kev kub ceev steel
Kev kub ceev steel (HSS) yog cov cuab yeej hlau uas muaj qhov tawv tawv, siab hnav tsis kam thiab kub kub ua haujlwm, tseem hu ua cua hlau lossis hlau ntse, uas txhais tau hais tias nws tuaj yeem ua kom tawv txawm tias txias hauv huab cua thaum quenching, thiab nws yog heev. ntse. Nws tseem hu ua dawb hlau.
High-speed steel yog cov hlau alloy nrog complex muaj pes tsawg leeg, muaj carbide-forming ntsiab xws li tungsten, molybdenum, chromium, vanadium, thiab cobalt. Tag nrho cov ntsiab lus ntawm alloying yog li ntawm 10 mus rau 25%. Nws tseem muaj peev xwm tuav tau siab hardness nyob rau hauv siab kub generated los ntawm high-speed txiav (kwv yees li 500 degree), thiab HRC tuaj yeem siab tshaj 60. Qhov no yog cov yam ntxwv tseem ceeb tshaj plaws ntawm high-speed steel - liab hardness. Tom qab quenching thiab low-temperature tempering, carbon tool steel muaj hardness heev nyob rau hauv chav tsev kub, tab sis thaum kub siab tshaj 200 degree, hardness poob sharply. Ntawm 500 degree, lub hardness tau poob mus rau theem zoo ib yam li lub xeev annealed. , tag nrho poob peev xwm txiav hlau, uas txwv tsis pub siv cov cuab yeej carbon steel hauv kev txiav cov cuab yeej. High-speed steel ua rau tuag tsis txaus ntawm cov cuab yeej carbon steel vim nws qhov zoo liab hardness.
High-speed steel yog tsuas yog siv los tsim cov txheej txheem nyias-edged thiab cuam tshuam-resistant hlau txiav cov cuab yeej. Nws tseem tuaj yeem siv los tsim cov kabmob kub thiab txias extrusion pwm, xws li cov cuab yeej tig, laum khoom, hobs, tshuab pom hniav thiab xav tau pwm.
tungsten hlau
Tungsten steel (tungsten carbide) muaj cov khoom zoo heev xws li siab hardness, hnav tsis kam, zoo zog thiab toughness, kub tsis kam, corrosion kuj, thiab lwm yam., tshwj xeeb tshaj yog nws siab hardness thiab hnav tsis kam, txawm nyob rau hauv kub ntawm 500 degree. Nws tseem tsis tau hloov pauv thiab tseem muaj qhov nyuaj siab ntawm 1000 degree.
Cov khoom tseem ceeb ntawm tungsten steel yog tungsten carbide thiab cobalt, uas suav txog 99% ntawm tag nrho cov khoom xyaw, thiab 1% yog lwm yam hlau, yog li nws yog hu ua tungsten steel, tseem hu ua cemented carbide, thiab suav tias yog cov hniav ntawm kev lag luam niaj hnub no.
Tungsten steel yog sintered composite khoom uas muaj tsawg kawg yog ib tug hlau carbide. Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, thiab tantalum carbide yog cov feem ntau ntawm tungsten steel. Cov carbide tivthaiv (los yog theem) muaj ib tug grain loj feem ntau ntawm 0.2 thiab 10 microns, thiab cov carbide nplej yog tuav ua ke siv ib tug hlau binder. Cov hlau sib txuas yog feem ntau yog ib pawg hlau hlau, thiab cobalt thiab npib tsib xee feem ntau yog siv. Yog li ntawd, muaj tungsten-cobalt alloys, tungsten-nickel alloys thiab tungsten-titanium-cobalt alloys.
Tungsten steel sintering molding yog nias cov hmoov rau hauv ib lub billet, ces nkag mus rau hauv lub qhov cub sintering kom sov mus rau qhov kub thiab txias (sintering kub), khaws cia rau ib lub sij hawm (sub tuav lub sij hawm), thiab tom qab ntawd txias nws kom tau tungsten. steel khoom nrog cov khoom yuav tsum tau.
①Tungsten-cobalt carbide
Cov khoom tseem ceeb yog tungsten carbide (WC) thiab binder cobalt (Co). Nws lub npe yog tsim los ntawm "YG" (thawj Suav pinyin ntawm "nyuaj, cobalt") thiab feem pua ntawm cov ntsiab lus cobalt nruab nrab. Piv txwv li, YG8 txhais tau hais tias qhov nruab nrab WCo=8%, thiab tus so yog tungsten carbide tungsten cobalt carbide.
②Tungsten titanium cobalt carbide
Cov khoom tseem ceeb yog tungsten carbide, titanium carbide (TiC) thiab cobalt. Nws lub npe muaj "YT" (lub npe ntawm Suav pinyin ntawm "nyuaj thiab titanium") thiab cov ntsiab lus nruab nrab ntawm titanium carbide. Piv txwv li, YT15 txhais tau tias nruab nrab TiC=15%, thiab tus so yog tungsten titanium cobalt cemented carbide nrog tungsten carbide thiab cobalt cov ntsiab lus.
③Tungsten titanium tantalum (niobium) carbide
Cov khoom tseem ceeb yog tungsten carbide, titanium carbide, tantalum carbide (los yog niobium carbide) thiab cobalt. Hom cemented carbide no tseem hu ua universal cemented carbide lossis universal cemented carbide. Nws lub npe muaj xws li "YW" (tus suav pinyin ua ntej ntawm "nyuaj" thiab "wan") ntxiv rau tus lej, xws li YW1.
Tungsten steel muaj cov khoom zoo heev xws li siab hardness, hnav tsis kam, zoo zog thiab toughness, kub tsis kam, thiab corrosion kuj. Tshwj xeeb, nws cov hardness siab thiab hnav tsis kam tseem nyob twj ywm tsis hloov txawm nyob rau ntawm qhov kub ntawm 500 degree. Nws tseem muaj siab hardness ntawm 1000 degree. Carbide yog dav siv los ua cov ntaub ntawv, xws li cov cuab yeej tig, milling cutters, laum cov khoom, cov cuab yeej tho txawv, thiab lwm yam. Qhov kev txiav ceev ntawm cov cemented carbide tshiab yog ntau pua zaus ntawm cov pa roj carbon steel.
