Kev sib xyaw ua ke ntawm cov cuab yeej ua haujlwm siab heev thiab cov cuab yeej ua haujlwm siab CNC tuaj yeem muab kev ua si tag nrho rau nws qhov kev ua tau zoo thiab ua tiav cov txiaj ntsig zoo. Nrog rau kev txhim kho sai ntawm cov khoom siv txiav, ntau yam khoom siv cuab yeej tshiab tau txhim kho lawv lub cev, cov cuab yeej cuab tam thiab txiav kev ua tau zoo, thiab lawv daim ntawv thov ntau kuj tseem nthuav dav.
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1. Cov cuab yeej siv yuav tsum muaj cov khoom siv yooj yim
tus
Kev xaiv cov khoom siv muaj txiaj ntsig zoo rau lub neej ntawm cov cuab yeej, kev ua haujlwm zoo, kev ua haujlwm zoo thiab cov nqi ua haujlwm. Thaum lub cuab yeej txiav, nws yuav tsum dais cov teebmeem ntawm kev kub siab, kub siab, kev sib txhuam, kev poob siab thiab kev co. Yog li ntawd, cov cuab yeej siv yuav tsum muaj cov yam ntxwv hauv qab no:
(1) Hardness thiab hnav tsis kam. Lub hardness ntawm cov cuab yeej siv yuav tsum siab tshaj ntawm cov khoom siv ua haujlwm, feem ntau siab dua 60HRC. Qhov nyuaj ntawm cov khoom siv, qhov zoo dua qhov hnav tsis kam.
(2) Lub zog thiab toughness. Cov cuab yeej siv yuav tsum muaj lub zog siab thiab tawv kom tiv taus kev txiav quab yuam, kev poob siab thiab kev vibrations, thiab tiv thaiv kev tawg thiab tawg ntawm cov cuab yeej.
(3) Thaum tshav kub kub tsis kam. Lub tshav kub tsis kam ntawm cov cuab yeej siv tau zoo dua, nws tuaj yeem tiv taus qhov kub thiab txias, thiab nws muaj kev tiv thaiv oxidation zoo.
(4) Cov txheej txheem kev ua tau zoo thiab kev lag luam. Cov cuab yeej siv yuav tsum muaj kev ua haujlwm zoo forging, kev kho cua sov, kev ua haujlwm vuam, kev sib tsoo, thiab lwm yam, thiab yuav tsum ua raws li kev ua tau zoo-tus nqi piv.
2. Hom, khoom, yam ntxwv thiab kev siv ntawm cov khoom siv
1. Hom, cov khoom thiab cov yam ntxwv ntawm cov khoom siv pob zeb diamond thiab cov cuab yeej siv
Pob zeb diamond yog ib qho allotrope ntawm cov pa roj carbon monoxide, thiab nws yog cov khoom siv nyuaj tshaj plaws nyob rau hauv qhov xwm txheej. Pob zeb diamond cov cuab yeej muaj siab hardness, siab hnav tsis kam thiab siab thermal conductivity, thiab yog dav siv nyob rau hauv kev ua cov hlau tsis-ferrous thiab cov ntaub ntawv uas tsis yog-hlau. Tshwj xeeb tshaj yog nyob rau hauv high-ceev txiav ntawm aluminium thiab silicon-aluminium alloys, pob zeb diamond cov cuab yeej yog lub ntsiab ntawm cov cuab yeej txiav uas nyuaj los hloov. Cov cuab yeej pob zeb diamond uas tuaj yeem ua tiav kev ua haujlwm siab, ruaj khov, thiab lub neej ntev machining yog qhov tseem ceeb thiab cov cuab yeej tseem ceeb hauv CNC machining niaj hnub.
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⑴ Cov cuab yeej pob zeb diamond
① Cov cuab yeej pob zeb diamond: Ntuj pob zeb diamond tau siv los ua cov cuab yeej txiav rau ntau pua xyoo. Lub ntuj ib leeg siv lead ua pob zeb diamond cuab yeej tau zoo hauv av, thiab txiav ntug tuaj yeem ua hauv av tsis tshua muaj neeg ntse. Lub kaum sab xis txiav tuaj yeem ncav cuag 0.002μm, uas tuaj yeem paub txog kev txiav ultra-nyias thiab tuaj yeem lees paub, zoo tagnrho thiab irreplaceable ultra-precision machining cuab yeej rau kev ua haujlwm siab heev workpiece precision thiab tsis tshua muaj nto roughness.
② PCD pob zeb diamond cuab yeej: Ntuj pob zeb diamond yog kim, thiab polycrystalline pob zeb diamond (PCD) yog siv dav hauv kev txiav. Txij li thaum xyoo 1970s, pob zeb diamond polycrystalline (Polycrystauine pob zeb diamond, PCD luv luv) tau tsim Tom qab ua tiav, cov cuab yeej pob zeb diamond ntuj tau hloov los ntawm cov pob zeb diamond polycrystalline ntau zaus. PCD raw khoom yog nplua nuj nyob rau hauv qhov chaw, thiab nws cov nqi tsuas yog ob peb feem kaum rau ib feem kaum ntawm ntuj pob zeb diamond.
Cov cuab yeej PCD tsis tuaj yeem zom cov npoo ntse heev, thiab qhov zoo ntawm cov txheej txheem ua haujlwm tsis zoo li cov pob zeb diamond ntuj. Nws tsis yooj yim rau kev tsim PCD inserts nrog chip breakers hauv kev lag luam. Yog li ntawd, PCD tsuas yog siv tau rau kev txiav cov hlau tsis muaj hlau thiab cov hlau tsis muaj hlau, thiab nws nyuaj rau kev ua tiav ultra-precision iav txiav.
③ CVD pob zeb diamond cov cuab yeej: Los ntawm lig 1970s mus rau thaum ntxov 1980s, CVD pob zeb diamond technology tshwm nyob rau hauv Nyiv. CVD pob zeb diamond hais txog kev sib txuas ntawm pob zeb diamond zaj duab xis ntawm heterogeneous substrates (xws li cemented carbide, ceramics, thiab lwm yam) los ntawm cov tshuaj vapor deposition (CVD). CVD pob zeb diamond muaj cov qauv zoo ib yam thiab cov yam ntxwv zoo li pob zeb diamond ntuj.
Qhov kev ua tau zoo ntawm CVD pob zeb diamond yog ze heev rau cov pob zeb diamond ntuj, thiab nws muaj qhov zoo ntawm ib leeg siv lead ua pob zeb diamond thiab polycrystalline pob zeb diamond (PCD), thiab kov yeej lawv qhov tsis txaus rau qee yam.
⑵ Kev ua tau zoo ntawm cov cuab yeej pob zeb diamond
① Tsis tshua muaj siab hardness thiab hnav tsis kam: Ntuj pob zeb diamond yog cov khoom hnyav tshaj plaws nyob rau hauv qhov xwm txheej. Pob zeb diamond muaj qhov hnav tsis kam zoo heev. Thaum ua cov khoom siv hardness siab, lub neej ntawm cov cuab yeej pob zeb diamond yog 10 mus rau 100 npaug ntawm cov cuab yeej cemented carbide, lossis txawm ntau pua zaus.
② Nws muaj cov coefficient ntawm kev sib txhuam tsawg heev: cov coefficient ntawm kev sib txhuam ntawm cov pob zeb diamond thiab qee cov hlau tsis muaj hlau yog qis dua li ntawm lwm cov cuab yeej txiav, cov coefficient ntawm kev sib txhuam yog tsawg, deformation thaum lub sij hawm ua yog me me, thiab txiav quab yuam muaj peev xwm. txo.
③ Kev txiav ntug yog qhov ntse heev: lub txiav ntug ntawm cov cuab yeej pob zeb diamond tuaj yeem ua kom ntse, thiab cov cuab yeej siv lead ua pob zeb ntuj tuaj yeem siab li 0.002-0.008μm, uas tuaj yeem siv rau ultra -thin txiav thiab ultra-precision machining.
④ Muaj cov thermal conductivity siab: pob zeb diamond muaj thermal conductivity thiab thermal diffusivity, txiav cov cua sov yog yooj yim dissipated, thiab qhov kub ntawm qhov txiav ib feem ntawm lub cuab tam yog tsawg.
⑤ Tsawg thermal expansion coefficient: Lub thermal expansion coefficient ntawm pob zeb diamond yog ob peb zaug me dua li cov cemented carbide, thiab qhov kev hloov ntawm cov cuab yeej loj los ntawm kev txiav cov cua sov me me, uas yog tshwj xeeb tshaj yog rau precision thiab ultra-precision machining uas yuav tsum tau siab. qhov tseeb.
⑶ Kev siv cov cuab yeej pob zeb diamond
Cov cuab yeej pob zeb diamond feem ntau yog siv rau kev txiav npluav thiab tho txawv ntawm cov hlau tsis muaj hlau thiab cov khoom tsis yog hlau ntawm kev kub ceev. Nws yog tsim rau kev ua ntau yam hnav-resistant non-metals, xws li FRP hmoov metallurgy blanks, ceramic khoom, thiab lwm yam .; ntau yam hnav-resistant non-ferrous hlau, xws li ntau yam silicon-aluminium alloys; ntau yam uas tsis yog-ferrous hlau ua tiav.
Qhov tsis zoo ntawm cov cuab yeej pob zeb diamond yog tias lawv muaj qhov tsis zoo thermal stability. Thaum lub txiav kub siab tshaj 700 degree mus rau 800 degree, nws yuav plam tag nrho nws hardness; Tsis tas li ntawd, nws tsis haum rau kev txiav ferrous hlau, vim hais tias pob zeb diamond (carbon) yog ib qho yooj yim rau kev sib txuas nrog hlau ntawm qhov kub thiab txias. Qhov kev ua atomic hloov cov pa roj carbon atom rau hauv cov qauv graphite, thiab cov cuab yeej tau yooj yim puas.
2. Hom, cov khoom thiab cov yam ntxwv ntawm cov cuab yeej cubic boron nitride thiab cov cuab yeej siv
Cubic boron nitride (CBN), qhov thib ob superhard khoom tsim los ntawm txoj kev zoo ib yam li pob zeb diamond, tsuas yog thib ob rau pob zeb diamond hais txog hardness thiab thermal conductivity. Nws muaj thermal stability zoo heev thiab tuaj yeem ua kom sov li 10, 000 degree hauv huab cua. Oxidation tsis tshwm sim. CBN muaj cov tshuaj ruaj khov heev rau cov hlau ferrous thiab tuaj yeem siv dav hauv kev ua cov khoom steel.
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⑴ Hom cubic boron nitride tej cuab yeej
Cubic boron nitride (CBN) yog ib yam khoom uas tsis muaj nyob hauv cov xwm txheej. Nws tuaj yeem muab faib ua ib qho siv lead ua thiab polycrystalline, uas yog, CBN ib leeg siv lead ua thiab polycrystalline cubic boron nitride (Polycrystalline cubic bornnitride, hu ua PCBN). CBN yog ib qho ntawm cov isomers ntawm boron nitride (BN), thiab nws cov qauv zoo ib yam li pob zeb diamond.
PCBN (polycrystalline cubic boron nitride) yog cov khoom siv polycrystalline uas sinters cov khoom zoo CBN los ntawm kev sib koom ua ke (TiC, TiN, Al, Ti, thiab lwm yam) nyob rau hauv qhov kub thiab txias. Cov khoom siv pob zeb diamond, nws thiab pob zeb diamond sib sau ua ke hu ua cov cuab yeej superhard. PCBN feem ntau yog siv los ua riam lossis lwm yam cuab yeej.
PCBN cov cuab yeej tuaj yeem muab faib ua ib qho PCBN inserts thiab PCBN cov khoom sib xyaw sintered nrog cemented carbide.
PCBN composite inserts yog tsim los ntawm sintering ib txheej ntawm PCBN nrog ib tug tuab ntawm {{0}}.5 mus rau 1.0mm ntawm ib tug cemented carbide nrog zoo zog thiab toughness. Nws kev ua tau zoo muaj ob qho tib si zoo toughness thiab siab hardness thiab hnav tsis kam. Cov teeb meem ntawm qhov tsis muaj zog dabtsi yog khoov thiab vuam nyuaj ntawm CBN inserts raug daws.
⑵ Cov khoom tseem ceeb thiab cov yam ntxwv ntawm cubic boron nitride
Txawm hais tias lub hardness ntawm cubic boron nitride yog me ntsis qis dua pob zeb diamond, nws yog ntau dua li lwm cov ntaub ntawv siab hardness. Qhov zoo tshaj plaws ntawm CBN yog tias nws cov thermal stability ntau dua li cov pob zeb diamond, uas tuaj yeem ncav cuag 1200 degree (700-800 degree rau pob zeb diamond). tshuaj tiv thaiv. Cov yam ntxwv tseem ceeb ntawm cubic boron nitride yog raws li hauv qab no.
① High hardness thiab hnav tsis kam: Cov qauv siv lead ua ntawm CBN zoo ib yam li cov pob zeb diamond, thiab muaj zog zoo sib xws rau pob zeb diamond. PCBN tshwj xeeb tshaj yog tsim rau kev ua cov ntaub ntawv hardness uas tsuas yog hauv av ua ntej, thiab tuaj yeem tau txais qhov zoo ntawm qhov chaw ua haujlwm.
② Siab thermal stability: Lub tshav kub tsis kam ntawm CBN tuaj yeem ncav cuag 1400-1500 degree, uas yuav luag 1 npaug siab dua li ntawm pob zeb diamond (700-800 degree ). PCBN cov cuab yeej tuaj yeem txiav cov hlau kub kub thiab cov hlau tawv tawv ntawm qhov ceev 3 mus rau 5 npaug siab dua li cov cuab yeej cemented carbide.
③Kev ruaj ntseg zoo heev: Nws tsis muaj tshuaj lom neeg nrog cov khoom siv hlau ntawm 1200-1300 degree, thiab nws yuav tsis hnav zoo li pob zeb diamond, thiab nws tseem tuaj yeem tswj tau qhov hardness ntawm cemented carbide lub sijhawm no; PCBN cov cuab yeej tsim nyog rau kev txiav hardened steel Parts thiab chilled cam khwb cia hlau, yuav tau lug siv nyob rau hauv high-ceev txiav cam khwb cia hlau.
④ Cov thermal conductivity zoo: Txawm hais tias cov thermal conductivity ntawm CBN tsis zoo li cov pob zeb diamond, thermal conductivity ntawm PCBN tsuas yog thib ob rau pob zeb diamond ntawm ntau yam khoom siv, thiab ntau dua li cov hlau kub ceev thiab cemented carbide.
⑤ Tsawg coefficient ntawm kev sib txhuam: Ib qho coefficient ntawm kev sib txhuam tsis tshua muaj peev xwm txo tau lub zog txiav thaum txiav, txo qhov kub thiab txias, thiab txhim kho qhov zoo ntawm cov tshuab ua haujlwm.
⑶ Cubic boron nitride daim ntawv thov
Cubic boron nitride yog tsim rau kev ua tiav ntau yam nyuaj-rau-txiav cov ntaub ntawv xws li hardened steel, tawv cam khwb cia hlau, high-temperature alloy, hard alloy, thiab nto txau cov ntaub ntawv. Qhov tseeb machining tuaj yeem ncav cuag IT5 (lub qhov yog IT6), thiab qhov roughness ntawm qhov chaw tuaj yeem yog me me li Ra1.25-0.20μm.
Cubic boron nitride cov cuab yeej siv tsis zoo toughness thiab khoov lub zog. Yog li ntawd, cubic boron nitride tig cov cuab yeej tsis haum rau kev ntxhib machining nrog tsawg ceev thiab siab load; Cov ntug kev ua haujlwm hnyav yuav tshwm sim nyob rau hauv cov ntaub ntawv ntawm hlau, uas yuav deteriorate lub machined nto.
3. Hom, cov khoom thiab cov yam ntxwv ntawm cov khoom siv ceramic thiab cov cuab yeej siv
Ceramic tej cuab yeej muaj cov yam ntxwv ntawm siab hardness, zoo hnav tsis kam, zoo heev tshav kub tsis kam thiab tshuaj stability, thiab tsis yooj yim rau daim ntawv cog lus nrog hlau. Ceramic txiav cov cuab yeej tuav txoj haujlwm tseem ceeb hauv CNC machining. Ceramic txiav cov cuab yeej tau dhau los ua ib qho tseem ceeb ntawm cov cuab yeej txiav rau kev kub ceev txiav thiab ua cov ntaub ntawv nyuaj rau tshuab. Ceramic tej cuab yeej yog dav siv nyob rau hauv high-ceev txiav, txiav qhuav, txiav nyuaj thiab txiav cov ntaub ntawv nyuaj-rau-tshuab. Ceramic riam tuaj yeem ua cov ntaub ntawv nyuaj uas cov riam tsoos tsis tuaj yeem ua txhua yam, thiab paub tias "hloov kev sib tsoo nrog lub tsheb"; Qhov zoo tshaj plaws txiav ceev ntawm ceramic riam tuaj yeem yog 2 mus rau 10 npaug siab dua li ntawm cov cemented carbide riam, yog li kev txhim kho kev ua haujlwm ntawm kev txiav cov khoom tseem ceeb siv hauv cov cuab yeej ceramic yog cov khoom siv ntau tshaj plaws hauv lub ntiaj teb crust. Yog li ntawd, qhov nrov thiab kev siv cov cuab yeej ceramic yog qhov tseem ceeb los txhim kho cov khoom tsim tau, txo cov nqi ua haujlwm, thiab txuag cov tswv yim zoo hlau, thiab tseem yuav txhawb kev txhim kho cov cuab yeej txiav. kev vam meej.
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⑴ Hom khoom siv ceramic
Cov khoom siv ceramic feem ntau tuaj yeem muab faib ua peb pawg: alumina-based ceramics, silicon nitride-based ceramics, thiab cov khoom siv silicon nitride-alumina-based ceramics. Ntawm lawv, alumina-based thiab silicon nitride-raws li cov khoom siv ceramic yog cov khoom siv dav tshaj plaws. Kev ua tau zoo ntawm silicon nitride-raws li ceramics yog superior rau ntawm alumina-based ceramics.
⑵ Kev ua tau zoo thiab cov yam ntxwv ntawm cov cuab yeej ceramic
Cov yam ntxwv ntawm kev ua haujlwm ntawm cov cuab yeej ceramic yog raws li hauv qab no:
① High hardness thiab zoo hnav tsis kam: Txawm hais tias hardness ntawm cov cuab yeej ceramic tsis siab npaum li ntawm PCD thiab PCBN, nws yog ntau dua li cov cemented carbide thiab cov cuab yeej high-speed steel, ncav cuag 93-95HRA. Cov cuab yeej ceramic tuaj yeem ua cov ntaub ntawv hardness siab uas nyuaj rau txheej txheem nrog cov cuab yeej ib txwm siv, thiab tsim nyog rau kev txiav ceev ceev thiab txiav nyuaj.
② Qhov kub thiab txias tsis kam: Cov cuab yeej ceramic tseem tuaj yeem txiav ntawm qhov kub siab tshaj 1200 degree. Ceramic riam muaj qhov kub thiab txias txhua yam khoom, thiab oxidation tsis kam ntawm A12O3 ceramic riam yog qhov zoo tshwj xeeb. Txawm hais tias qhov txiav ntug yog nyob rau hauv lub xeev kub kub, nws tuaj yeem siv tsis tu ncua. Yog li ntawd, cov cuab yeej ceramic tuaj yeem ua tiav kev txiav qhuav, uas tuaj yeem txuag cov dej txiav.
③ Kev ruaj ntseg tshuaj zoo: cov cuab yeej txiav ceramic tsis yooj yim rau kev cog lus nrog cov hlau, thiab muaj corrosion-resistant thiab chemically ruaj khov, uas tuaj yeem txo cov kev sib txuas ntawm cov cuab yeej txiav.
④ Tsawg coefficient ntawm kev sib txhuam: Lub affinity ntawm ceramic txiav cov cuab yeej thiab hlau yog me me, thiab cov coefficient ntawm kev sib txhuam yog tsawg, uas yuav txo tau txiav quab yuam thiab txiav kub.
⑶ Kev siv cov riam ceramic
Ceramics yog ib qho ntawm cov cuab yeej siv feem ntau siv rau kev ua tiav high-speed thiab semi-tiav. Ceramic txiav cov cuab yeej tsim nyog rau kev txiav txhua yam cam khwb cia hlau (grey cam khwb cia hlau, ductile hlau, malleable cam khwb cia hlau, chilled cam khwb cia hlau, siab alloy hnav-resistant cam khwb cia hlau) thiab hlau (carbon structural steel, alloy structural steel, siab zog steel. , siab manganese steel, quenched steel thiab lwm yam), kuj tuaj yeem siv los txiav tooj liab alloys, graphite, engineering plastics thiab cov ntaub ntawv sib xyaw.
Muaj teeb meem ntawm qhov tsis muaj zog dabtsi yog khoov tsis zoo thiab tsis zoo cuam tshuam rau kev ua haujlwm ntawm cov khoom siv ceramic, uas tsis haum rau kev txiav hauv qis qis thiab cuam tshuam.
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4. Cov cuab yeej thiab cov yam ntxwv ntawm cov cuab yeej txiav coated thiab siv cov cuab yeej txiav
Txheej cov cuab yeej yog ib txoj hauv kev tseem ceeb los txhim kho kev ua haujlwm ntawm lub cuab yeej. Qhov tshwm sim ntawm cov cuab yeej coated txiav tau ua ib qho tseem ceeb hauv kev txiav cov cuab yeej txiav. Cov cuab yeej coated yog coated nrog ib los yog ntau txheej ntawm refractory compound nrog zoo hnav tsis kam ntawm cov cuab yeej tougher lub cev, uas sib txuas cov cuab yeej substrate nrog cov txheej tawv tawv, kom cov kev ua tau zoo ntawm cov cuab yeej zoo heev. Coated txiav cov cuab yeej tuaj yeem txhim kho kev ua tau zoo, txhim kho kev ua tiav, ua kom lub neej ntev thiab txo cov nqi ua haujlwm.
Kwv yees li 80 feem pua ntawm cov cuab yeej txiav siv hauv cov cuab yeej siv tshuab CNC tshiab siv cov cuab yeej coated. Coated txiav cov cuab yeej yuav yog cov cuab yeej tseem ceeb tshaj plaws hauv kev ua haujlwm ntawm CNC machining yav tom ntej.
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⑴ Cov cuab yeej coated
Raws li cov txheej txheem sib txawv, cov cuab yeej coated tuaj yeem muab faib ua cov cuab yeej siv tshuaj vapor deposition (CVD) coated thiab lub cev vapor deposition (PVD) coated cov cuab yeej. Coated carbide cov cuab yeej feem ntau siv cov tshuaj vapor deposition, thiab qhov kub ntawm deposition yog nyob ib ncig ntawm 1000 degree. Coated high-speed steel cov cuab yeej feem ntau siv lub cev vapor deposition, thiab cov deposition kub yog hais txog 500 degree;
Raws li cov khoom siv sib txawv ntawm cov khoom siv coated, cov cuab yeej coated tuaj yeem muab faib ua cov cuab yeej carbide coated, cov cuab yeej siv high-speed steel coated, thiab cov cuab yeej coated ntawm ceramics thiab superhard cov ntaub ntawv (pob zeb diamond thiab cubic boron nitride).
Raws li qhov xwm txheej ntawm cov khoom siv txheej txheej, cov cuab yeej coated tuaj yeem muab faib ua ob pawg, uas yog "nyuaj" coated cov cuab yeej thiab 'mos' coated cov cuab yeej. Lub hom phiaj tseem ceeb ua raws li "nyuaj" coated cov cuab yeej yog siab hardness thiab hnav tsis kam Nws lub ntsiab zoo yog siab hardness thiab zoo hnav tsis kam, feem ntau yog TiC thiab TiN txheej. Lub hom phiaj ua raws li cov cuab yeej "soft" txheej yog cov coefficient tsawg ntawm kev sib txhuam, tseem hu ua cov cuab yeej lubricating tus kheej, thiab nws cov kev sib txhuam nrog cov khoom siv ua haujlwm Cov coefficient tsawg heev, tsuas yog hais txog 0.1, uas tuaj yeem txo kev sib txuas, txo kev sib txhuam, txo kev txiav quab yuam thiab txiav kub.
Tsis ntev los no tau tsim cov cuab yeej nano-coating (Nanoeoating). Cov cuab yeej coated no tuaj yeem siv cov khoom sib txawv ntawm ntau cov ntaub ntawv txheej (xws li hlau / hlau, hlau / ceramic, ceramic / ceramic, thiab lwm yam) kom ua tau raws li qhov sib txawv ntawm kev ua haujlwm thiab kev ua haujlwm. Cov txheej txheem nano-txheej txheem tsim tau zoo tuaj yeem ua rau cov cuab yeej siv tau zoo heev los tiv thaiv kev sib txhuam thiab tiv thaiv kev ua haujlwm thiab nws tus kheej lubricating zog, uas yog tsim rau high-speed qhuav txiav.
⑵ Cov yam ntxwv ntawm cov cuab yeej coated
Cov yam ntxwv ua haujlwm ntawm cov cuab yeej coated yog raws li hauv qab no:
① Zoo txhua yam thiab kev ua haujlwm zoo: Cov cuab yeej coated muab cov khoom zoo ntawm cov khoom siv hauv paus thiab cov khoom siv txheej, uas tsis tsuas yog tswj xyuas qhov zoo toughness thiab siab zog ntawm lub hauv paus.
Kev sib xyaw ua ke ntawm cov cuab yeej ua haujlwm siab heev thiab cov cuab yeej ua haujlwm siab CNC tuaj yeem muab kev ua si tag nrho rau nws qhov kev ua tau zoo thiab ua tiav cov txiaj ntsig zoo. Nrog rau kev txhim kho sai ntawm cov khoom siv txiav, ntau yam khoom siv cuab yeej tshiab tau txhim kho lawv lub cev, cov cuab yeej cuab tam thiab txiav kev ua tau zoo, thiab lawv daim ntawv thov ntau kuj tseem nthuav dav.
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1. Cov cuab yeej siv yuav tsum muaj cov khoom siv yooj yim
tus
Kev xaiv cov khoom siv muaj txiaj ntsig zoo rau lub neej ntawm cov cuab yeej, kev ua haujlwm zoo, kev ua haujlwm zoo thiab cov nqi ua haujlwm. Thaum lub cuab yeej txiav, nws yuav tsum dais cov teebmeem ntawm kev kub siab, kub siab, kev sib txhuam, kev poob siab thiab kev co. Yog li ntawd, cov cuab yeej siv yuav tsum muaj cov yam ntxwv hauv qab no:
(1) Hardness thiab hnav tsis kam. Lub hardness ntawm cov cuab yeej siv yuav tsum siab tshaj ntawm cov khoom siv ua haujlwm, feem ntau siab dua 60HRC. Qhov nyuaj ntawm cov khoom siv, qhov zoo dua qhov hnav tsis kam.
(2) Lub zog thiab toughness. Cov cuab yeej siv yuav tsum muaj lub zog siab thiab tawv kom tiv taus kev txiav quab yuam, kev poob siab thiab kev vibrations, thiab tiv thaiv kev tawg thiab tawg ntawm cov cuab yeej.
(3) Thaum tshav kub kub tsis kam. Lub tshav kub tsis kam ntawm cov cuab yeej siv tau zoo dua, nws tuaj yeem tiv taus qhov kub thiab txias, thiab nws muaj kev tiv thaiv oxidation zoo.
(4) Cov txheej txheem kev ua tau zoo thiab kev lag luam. Cov cuab yeej siv yuav tsum muaj kev ua haujlwm zoo forging, kev kho cua sov, kev ua haujlwm vuam, kev sib tsoo, thiab lwm yam, thiab yuav tsum ua raws li kev ua tau zoo-tus nqi piv.
2. Hom, khoom, yam ntxwv thiab kev siv ntawm cov khoom siv
1. Hom, cov khoom thiab cov yam ntxwv ntawm cov khoom siv pob zeb diamond thiab cov cuab yeej siv
Pob zeb diamond yog ib qho allotrope ntawm cov pa roj carbon monoxide, thiab nws yog cov khoom siv nyuaj tshaj plaws nyob rau hauv qhov xwm txheej. Pob zeb diamond cov cuab yeej muaj siab hardness, siab hnav tsis kam thiab siab thermal conductivity, thiab yog dav siv nyob rau hauv kev ua cov hlau tsis-ferrous thiab cov ntaub ntawv uas tsis yog-hlau. Tshwj xeeb tshaj yog nyob rau hauv high-ceev txiav ntawm aluminium thiab silicon-aluminium alloys, pob zeb diamond cov cuab yeej yog lub ntsiab ntawm cov cuab yeej txiav uas nyuaj los hloov. Cov cuab yeej pob zeb diamond uas tuaj yeem ua tiav kev ua haujlwm siab, ruaj khov, thiab lub neej ntev machining yog qhov tseem ceeb thiab cov cuab yeej tseem ceeb hauv CNC machining niaj hnub.
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⑴ Cov cuab yeej pob zeb diamond
① Cov cuab yeej pob zeb diamond: Ntuj pob zeb diamond tau siv los ua cov cuab yeej txiav rau ntau pua xyoo. Lub ntuj ib leeg siv lead ua pob zeb diamond cuab yeej tau zoo hauv av, thiab txiav ntug tuaj yeem ua hauv av tsis tshua muaj neeg ntse. Lub kaum sab xis txiav tuaj yeem ncav cuag 0.002μm, uas tuaj yeem paub txog kev txiav ultra-nyias thiab tuaj yeem lees paub, zoo tagnrho thiab irreplaceable ultra-precision machining cuab yeej rau kev ua haujlwm siab heev workpiece precision thiab tsis tshua muaj nto roughness.
② PCD pob zeb diamond cuab yeej: Ntuj pob zeb diamond yog kim, thiab polycrystalline pob zeb diamond (PCD) yog siv dav hauv kev txiav. Txij li thaum xyoo 1970s, pob zeb diamond polycrystalline (Polycrystauine pob zeb diamond, PCD luv luv) tau tsim Tom qab ua tiav, cov cuab yeej pob zeb diamond ntuj tau hloov los ntawm cov pob zeb diamond polycrystalline ntau zaus. PCD raw khoom yog nplua nuj nyob rau hauv qhov chaw, thiab nws cov nqi tsuas yog ob peb feem kaum rau ib feem kaum ntawm ntuj pob zeb diamond.
Cov cuab yeej PCD tsis tuaj yeem zom cov npoo ntse heev, thiab qhov zoo ntawm cov txheej txheem ua haujlwm tsis zoo li cov pob zeb diamond ntuj. Nws tsis yooj yim rau kev tsim PCD inserts nrog chip breakers hauv kev lag luam. Yog li ntawd, PCD tsuas yog siv tau rau kev txiav cov hlau tsis muaj hlau thiab cov hlau tsis muaj hlau, thiab nws nyuaj rau kev ua tiav ultra-precision iav txiav.
③ CVD pob zeb diamond cov cuab yeej: Los ntawm lig 1970s mus rau thaum ntxov 1980s, CVD pob zeb diamond technology tshwm nyob rau hauv Nyiv. CVD pob zeb diamond hais txog kev sib txuas ntawm pob zeb diamond zaj duab xis ntawm heterogeneous substrates (xws li cemented carbide, ceramics, thiab lwm yam) los ntawm cov tshuaj vapor deposition (CVD). CVD pob zeb diamond muaj cov qauv zoo ib yam thiab cov yam ntxwv zoo li pob zeb diamond ntuj.
Qhov kev ua tau zoo ntawm CVD pob zeb diamond yog ze heev rau cov pob zeb diamond ntuj, thiab nws muaj qhov zoo ntawm ib leeg siv lead ua pob zeb diamond thiab polycrystalline pob zeb diamond (PCD), thiab kov yeej lawv qhov tsis txaus rau qee yam.
⑵ Kev ua tau zoo ntawm cov cuab yeej pob zeb diamond
① Tsis tshua muaj siab hardness thiab hnav tsis kam: Ntuj pob zeb diamond yog cov khoom hnyav tshaj plaws nyob rau hauv qhov xwm txheej. Pob zeb diamond muaj qhov hnav tsis kam zoo heev. Thaum ua cov khoom siv hardness siab, lub neej ntawm cov cuab yeej pob zeb diamond yog 10 mus rau 100 npaug ntawm cov cuab yeej cemented carbide, lossis txawm ntau pua zaus.
② Nws muaj cov coefficient ntawm kev sib txhuam tsawg heev: cov coefficient ntawm kev sib txhuam ntawm cov pob zeb diamond thiab qee cov hlau tsis muaj hlau yog qis dua li ntawm lwm cov cuab yeej txiav, cov coefficient ntawm kev sib txhuam yog tsawg, deformation thaum lub sij hawm ua yog me me, thiab txiav quab yuam muaj peev xwm. txo.
③ Kev txiav ntug yog qhov ntse heev: lub txiav ntug ntawm cov cuab yeej pob zeb diamond tuaj yeem ua kom ntse, thiab cov cuab yeej siv lead ua pob zeb ntuj tuaj yeem siab li 0.002-0.008μm, uas tuaj yeem siv rau ultra -thin txiav thiab ultra-precision machining.
④ Muaj cov thermal conductivity siab: pob zeb diamond muaj thermal conductivity thiab thermal diffusivity, txiav cov cua sov yog yooj yim dissipated, thiab qhov kub ntawm qhov txiav ib feem ntawm lub cuab tam yog tsawg.
⑤ Tsawg thermal expansion coefficient: Lub thermal expansion coefficient ntawm pob zeb diamond yog ob peb zaug me dua li cov cemented carbide, thiab qhov kev hloov ntawm cov cuab yeej loj los ntawm kev txiav cov cua sov me me, uas yog tshwj xeeb tshaj yog rau precision thiab ultra-precision machining uas yuav tsum tau siab. qhov tseeb.
⑶ Kev siv cov cuab yeej pob zeb diamond
Cov cuab yeej pob zeb diamond feem ntau yog siv rau kev txiav npluav thiab tho txawv ntawm cov hlau tsis muaj hlau thiab cov khoom tsis yog hlau ntawm kev kub ceev. Nws yog tsim rau kev ua ntau yam hnav-resistant non-metals, xws li FRP hmoov metallurgy blanks, ceramic khoom, thiab lwm yam .; ntau yam hnav-resistant non-ferrous hlau, xws li ntau yam silicon-aluminium alloys; ntau yam uas tsis yog-ferrous hlau ua tiav.
Qhov tsis zoo ntawm cov cuab yeej pob zeb diamond yog tias lawv muaj qhov tsis zoo thermal stability. Thaum lub txiav kub siab tshaj 700 degree mus rau 800 degree, nws yuav plam tag nrho nws hardness; Tsis tas li ntawd, nws tsis haum rau kev txiav ferrous hlau, vim hais tias pob zeb diamond (carbon) yog ib qho yooj yim rau kev sib txuas nrog hlau ntawm qhov kub thiab txias. Qhov kev ua atomic hloov cov pa roj carbon atom rau hauv cov qauv graphite, thiab cov cuab yeej tau yooj yim puas.
2. Hom, cov khoom thiab cov yam ntxwv ntawm cov cuab yeej cubic boron nitride thiab cov cuab yeej siv
Cubic boron nitride (CBN), qhov thib ob superhard khoom tsim los ntawm txoj kev zoo ib yam li pob zeb diamond, tsuas yog thib ob rau pob zeb diamond hais txog hardness thiab thermal conductivity. Nws muaj thermal stability zoo heev thiab tuaj yeem ua kom sov li 10, 000 degree hauv huab cua. Oxidation tsis tshwm sim. CBN muaj cov tshuaj ruaj khov heev rau cov hlau ferrous thiab tuaj yeem siv dav hauv kev ua cov khoom steel.
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⑴ Hom cubic boron nitride tej cuab yeej
Cubic boron nitride (CBN) yog ib yam khoom uas tsis muaj nyob hauv cov xwm txheej. Nws tuaj yeem muab faib ua ib qho siv lead ua thiab polycrystalline, uas yog, CBN ib leeg siv lead ua thiab polycrystalline cubic boron nitride (Polycrystalline cubic bornnitride, hu ua PCBN). CBN yog ib qho ntawm cov isomers ntawm boron nitride (BN), thiab nws cov qauv zoo ib yam li pob zeb diamond.
PCBN (polycrystalline cubic boron nitride) yog cov khoom siv polycrystalline uas sinters cov khoom zoo CBN los ntawm kev sib koom ua ke (TiC, TiN, Al, Ti, thiab lwm yam) nyob rau hauv qhov kub thiab txias. Cov khoom siv pob zeb diamond, nws thiab pob zeb diamond sib sau ua ke hu ua cov cuab yeej superhard. PCBN feem ntau yog siv los ua riam lossis lwm yam cuab yeej.
PCBN cov cuab yeej tuaj yeem muab faib ua ib qho PCBN inserts thiab PCBN cov khoom sib xyaw sintered nrog cemented carbide.
PCBN composite inserts yog tsim los ntawm sintering ib txheej ntawm PCBN nrog ib tug tuab ntawm {{0}}.5 mus rau 1.0mm ntawm ib tug cemented carbide nrog zoo zog thiab toughness. Nws kev ua tau zoo muaj ob qho tib si zoo toughness thiab siab hardness thiab hnav tsis kam. Cov teeb meem ntawm qhov tsis muaj zog dabtsi yog khoov thiab vuam nyuaj ntawm CBN inserts raug daws.
⑵ Cov khoom tseem ceeb thiab cov yam ntxwv ntawm cubic boron nitride
Txawm hais tias lub hardness ntawm cubic boron nitride yog me ntsis qis dua pob zeb diamond, nws yog ntau dua li lwm cov ntaub ntawv siab hardness. Qhov zoo tshaj plaws ntawm CBN yog tias nws cov thermal stability ntau dua li cov pob zeb diamond, uas tuaj yeem ncav cuag 1200 degree (700-800 degree rau pob zeb diamond). tshuaj tiv thaiv. Cov yam ntxwv tseem ceeb ntawm cubic boron nitride yog raws li hauv qab no.
① High hardness thiab hnav tsis kam: Cov qauv siv lead ua ntawm CBN zoo ib yam li cov pob zeb diamond, thiab muaj zog zoo sib xws rau pob zeb diamond. PCBN tshwj xeeb tshaj yog tsim rau kev ua cov ntaub ntawv hardness uas tsuas yog hauv av ua ntej, thiab tuaj yeem tau txais qhov zoo ntawm qhov chaw ua haujlwm.
② Siab thermal stability: Lub tshav kub tsis kam ntawm CBN tuaj yeem ncav cuag 1400-1500 degree, uas yuav luag 1 npaug siab dua li ntawm pob zeb diamond (700-800 degree ). PCBN cov cuab yeej tuaj yeem txiav cov hlau kub kub thiab cov hlau tawv tawv ntawm qhov ceev 3 mus rau 5 npaug siab dua li cov cuab yeej cemented carbide.
③Kev ruaj ntseg zoo heev: Nws tsis muaj tshuaj lom neeg nrog cov khoom siv hlau ntawm 1200-1300 degree, thiab nws yuav tsis hnav zoo li pob zeb diamond, thiab nws tseem tuaj yeem tswj tau qhov hardness ntawm cemented carbide lub sijhawm no; PCBN cov cuab yeej tsim nyog rau kev txiav hardened steel Parts thiab chilled cam khwb cia hlau, yuav tau lug siv nyob rau hauv high-ceev txiav cam khwb cia hlau.
④ Cov thermal conductivity zoo: Txawm hais tias cov thermal conductivity ntawm CBN tsis zoo li cov pob zeb diamond, thermal conductivity ntawm PCBN tsuas yog thib ob rau pob zeb diamond ntawm ntau yam khoom siv, thiab ntau dua li cov hlau kub ceev thiab cemented carbide.
⑤ Tsawg coefficient ntawm kev sib txhuam: Ib qho coefficient ntawm kev sib txhuam tsis tshua muaj peev xwm txo tau lub zog txiav thaum txiav, txo qhov kub thiab txias, thiab txhim kho qhov zoo ntawm cov tshuab ua haujlwm.
⑶ Cubic boron nitride daim ntawv thov
Cubic boron nitride yog tsim rau kev ua tiav ntau yam nyuaj-rau-txiav cov ntaub ntawv xws li hardened steel, tawv cam khwb cia hlau, high-temperature alloy, hard alloy, thiab nto txau cov ntaub ntawv. Qhov tseeb machining tuaj yeem ncav cuag IT5 (lub qhov yog IT6), thiab qhov roughness ntawm qhov chaw tuaj yeem yog me me li Ra1.25-0.20μm.
Cubic boron nitride cov cuab yeej siv tsis zoo toughness thiab khoov lub zog. Yog li ntawd, cubic boron nitride tig cov cuab yeej tsis haum rau kev ntxhib machining nrog tsawg ceev thiab siab load; Cov ntug kev ua haujlwm hnyav yuav tshwm sim nyob rau hauv cov ntaub ntawv ntawm hlau, uas yuav deteriorate lub machined nto.
3. Hom, cov khoom thiab cov yam ntxwv ntawm cov khoom siv ceramic thiab cov cuab yeej siv
Ceramic tej cuab yeej muaj cov yam ntxwv ntawm siab hardness, zoo hnav tsis kam, zoo heev tshav kub tsis kam thiab tshuaj stability, thiab tsis yooj yim rau daim ntawv cog lus nrog hlau. Ceramic txiav cov cuab yeej tuav txoj haujlwm tseem ceeb hauv CNC machining. Ceramic txiav cov cuab yeej tau dhau los ua ib qho tseem ceeb ntawm cov cuab yeej txiav rau kev kub ceev txiav thiab ua cov ntaub ntawv nyuaj rau tshuab. Ceramic tej cuab yeej yog dav siv nyob rau hauv high-ceev txiav, txiav qhuav, txiav nyuaj thiab txiav cov ntaub ntawv nyuaj-rau-tshuab. Ceramic riam tuaj yeem ua cov ntaub ntawv nyuaj uas cov riam tsoos tsis tuaj yeem ua txhua yam, thiab paub tias "hloov kev sib tsoo nrog lub tsheb"; Qhov zoo tshaj plaws txiav ceev ntawm ceramic riam tuaj yeem yog 2 mus rau 10 npaug siab dua li ntawm cov cemented carbide riam, yog li kev txhim kho kev ua haujlwm ntawm kev txiav cov khoom tseem ceeb siv hauv cov cuab yeej ceramic yog cov khoom siv ntau tshaj plaws hauv lub ntiaj teb crust. Yog li ntawd, qhov nrov thiab kev siv cov cuab yeej ceramic yog qhov tseem ceeb los txhim kho cov khoom tsim tau, txo cov nqi ua haujlwm, thiab txuag cov tswv yim zoo hlau, thiab tseem yuav txhawb kev txhim kho cov cuab yeej txiav. kev vam meej.
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⑴ Hom khoom siv ceramic
Cov khoom siv ceramic feem ntau tuaj yeem muab faib ua peb pawg: alumina-based ceramics, silicon nitride-based ceramics, thiab cov khoom siv silicon nitride-alumina-based ceramics. Ntawm lawv, alumina-based thiab silicon nitride-raws li cov khoom siv ceramic yog cov khoom siv dav tshaj plaws. Kev ua tau zoo ntawm silicon nitride-raws li ceramics yog superior rau ntawm alumina-based ceramics.
⑵ Kev ua tau zoo thiab cov yam ntxwv ntawm cov cuab yeej ceramic
Cov yam ntxwv ntawm kev ua haujlwm ntawm cov cuab yeej ceramic yog raws li hauv qab no:
① High hardness thiab zoo hnav tsis kam: Txawm hais tias hardness ntawm cov cuab yeej ceramic tsis siab npaum li ntawm PCD thiab PCBN, nws yog ntau dua li cov cemented carbide thiab cov cuab yeej high-speed steel, ncav cuag 93-95HRA. Cov cuab yeej ceramic tuaj yeem ua cov ntaub ntawv hardness siab uas nyuaj rau txheej txheem nrog cov cuab yeej ib txwm siv, thiab tsim nyog rau kev txiav ceev ceev thiab txiav nyuaj.
② Qhov kub thiab txias tsis kam: Cov cuab yeej ceramic tseem tuaj yeem txiav ntawm qhov kub siab tshaj 1200 degree. Ceramic riam muaj qhov kub thiab txias txhua yam khoom, thiab oxidation tsis kam ntawm A12O3 ceramic riam yog qhov zoo tshwj xeeb. Txawm hais tias qhov txiav ntug yog nyob rau hauv lub xeev kub kub, nws tuaj yeem siv tsis tu ncua. Yog li ntawd, cov cuab yeej ceramic tuaj yeem ua tiav kev txiav qhuav, uas tuaj yeem txuag cov dej txiav.
③ Kev ruaj ntseg tshuaj zoo: cov cuab yeej txiav ceramic tsis yooj yim rau kev cog lus nrog cov hlau, thiab muaj corrosion-resistant thiab chemically ruaj khov, uas tuaj yeem txo cov kev sib txuas ntawm cov cuab yeej txiav.
④ Tsawg coefficient ntawm kev sib txhuam: Lub affinity ntawm ceramic txiav cov cuab yeej thiab hlau yog me me, thiab cov coefficient ntawm kev sib txhuam yog tsawg, uas yuav txo tau txiav quab yuam thiab txiav kub.
⑶ Kev siv cov riam ceramic
Ceramics yog ib qho ntawm cov cuab yeej siv feem ntau siv rau kev ua tiav high-speed thiab semi-tiav. Ceramic txiav cov cuab yeej tsim nyog rau kev txiav txhua yam cam khwb cia hlau (grey cam khwb cia hlau, ductile hlau, malleable cam khwb cia hlau, chilled cam khwb cia hlau, siab alloy hnav-resistant cam khwb cia hlau) thiab hlau (carbon structural steel, alloy structural steel, siab zog steel. , siab manganese steel, quenched steel thiab lwm yam), kuj tuaj yeem siv los txiav tooj liab alloys, graphite, engineering plastics thiab cov ntaub ntawv sib xyaw.
Muaj teeb meem ntawm qhov tsis muaj zog dabtsi yog khoov tsis zoo thiab tsis zoo cuam tshuam rau kev ua haujlwm ntawm cov khoom siv ceramic, uas tsis haum rau kev txiav hauv qis qis thiab cuam tshuam.
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4. Cov cuab yeej thiab cov yam ntxwv ntawm cov cuab yeej txiav coated thiab siv cov cuab yeej txiav
Txheej cov cuab yeej yog ib txoj hauv kev tseem ceeb los txhim kho kev ua haujlwm ntawm lub cuab yeej. Qhov tshwm sim ntawm cov cuab yeej coated txiav tau ua ib qho tseem ceeb hauv kev txiav cov cuab yeej txiav. Cov cuab yeej coated yog coated nrog ib los yog ntau txheej ntawm refractory compound nrog zoo hnav tsis kam ntawm cov cuab yeej tougher lub cev, uas sib txuas cov cuab yeej substrate nrog cov txheej tawv tawv, kom cov kev ua tau zoo ntawm cov cuab yeej zoo heev. Coated txiav cov cuab yeej tuaj yeem txhim kho kev ua tau zoo, txhim kho kev ua tiav, ua kom lub neej ntev thiab txo cov nqi ua haujlwm.
Kwv yees li 80 feem pua ntawm cov cuab yeej txiav siv hauv cov cuab yeej siv tshuab CNC tshiab siv cov cuab yeej coated. Coated txiav cov cuab yeej yuav yog cov cuab yeej tseem ceeb tshaj plaws hauv kev ua haujlwm ntawm CNC machining yav tom ntej.
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⑴ Cov cuab yeej coated
Raws li cov txheej txheem sib txawv, cov cuab yeej coated tuaj yeem muab faib ua cov cuab yeej siv tshuaj vapor deposition (CVD) coated thiab lub cev vapor deposition (PVD) coated cov cuab yeej. Coated carbide cov cuab yeej feem ntau siv cov tshuaj vapor deposition, thiab qhov kub ntawm deposition yog nyob ib ncig ntawm 1000 degree. Coated high-speed steel cov cuab yeej feem ntau siv lub cev vapor deposition, thiab cov deposition kub yog hais txog 500 degree;
Raws li cov khoom siv sib txawv ntawm cov khoom siv coated, cov cuab yeej coated tuaj yeem muab faib ua cov cuab yeej carbide coated, cov cuab yeej siv high-speed steel coated, thiab cov cuab yeej coated ntawm ceramics thiab superhard cov ntaub ntawv (pob zeb diamond thiab cubic boron nitride).
Raws li qhov xwm txheej ntawm cov khoom siv txheej txheej, cov cuab yeej coated tuaj yeem muab faib ua ob pawg, uas yog "nyuaj" coated cov cuab yeej thiab 'mos' coated cov cuab yeej. Lub hom phiaj tseem ceeb ua raws li "nyuaj" coated cov cuab yeej yog siab hardness thiab hnav tsis kam Nws lub ntsiab zoo yog siab hardness thiab zoo hnav tsis kam, feem ntau yog TiC thiab TiN txheej. Lub hom phiaj ua raws li cov cuab yeej "soft" txheej yog cov coefficient tsawg ntawm kev sib txhuam, tseem hu ua cov cuab yeej lubricating tus kheej, thiab nws cov kev sib txhuam nrog cov khoom siv ua haujlwm Cov coefficient tsawg heev, tsuas yog hais txog 0.1, uas tuaj yeem txo kev sib txuas, txo kev sib txhuam, txo kev txiav quab yuam thiab txiav kub.
Tsis ntev los no tau tsim cov cuab yeej nano-coating (Nanoeoating). Cov cuab yeej coated no tuaj yeem siv cov khoom sib txawv ntawm ntau cov ntaub ntawv txheej (xws li hlau / hlau, hlau / ceramic, ceramic / ceramic, thiab lwm yam) kom ua tau raws li qhov sib txawv ntawm kev ua haujlwm thiab kev ua haujlwm. Cov txheej txheem nano-txheej txheem tsim tau zoo tuaj yeem ua rau cov cuab yeej siv tau zoo heev los tiv thaiv kev sib txhuam thiab tiv thaiv kev ua haujlwm thiab nws tus kheej lubricating zog, uas yog tsim rau high-speed qhuav txiav.
⑵ Cov yam ntxwv ntawm cov cuab yeej coated
Cov yam ntxwv ua haujlwm ntawm cov cuab yeej coated yog raws li hauv qab no:
① Zoo txhua yam thiab kev ua haujlwm zoo: Cov cuab yeej coated muab cov khoom zoo ntawm cov khoom siv hauv paus thiab cov khoom siv txheej, uas tsis tsuas yog tswj xyuas qhov zoo toughness thiab siab zog ntawm lub hauv paus.
