45 # Hlau: "Lub Hnub Qub Tub Kawm" ntawm Cov Khoom Siv Hluav Taws Xob
Lub "45" nyob rau hauv lub npe 45 # steel hais txog cov ntsiab lus carbon ntawm kwv yees li 0.45%. Tsis txhob kwv yees qhov feem ntawm ib feem ntawm cov pa roj carbon; nws ncaj qha txiav txim siab steel lub hardness thiab lub zog.
45# Steel Gallery_360 Encyclopedia
Tom qab quenching thiab siab -kub tempering (tus txheej txheem hu ua "quenching thiab tempering"), 45 # steel tuaj yeem ua tiav qhov hardness ntawm HB 220-280. Nws lub zog tensile siab tshaj 600 MPa, thiab nws cov yield zog tshaj 355 MPa. Qhov no txhais li cas? Nws txhais tau hais tias rau cov ncej ntawm tib lub thickness, 45 # steel tuaj yeem tiv taus qhov hnyav dua thiab tsis tshua muaj kev khoov lossis tawg.
Yog vim li cas 45 # steel yog qhov kev xaiv saum toj kawg nkaus hauv kev tsim kho tshuab rau kev thauj khoom -cov kabmob xws li cov ncej, lub zog, thiab bolts.
Txawm li cas los xij, 45 # steel muaj qhov tsis muaj zog txaus: nws yog qhov ua rau xeb.
Qhov no yog qhov xwm ntawm carbon steel; nws xeb sai sai thaum raug huab cua los yog ya raws. Txawm hais tias ib qho tshuaj tiv thaiv - xeb xim yog siv rau saum npoo, nws tsuas yog ncua cov txheej txheem es tsis txhob tiv thaiv nws tag nrho. Nyob rau hauv ib puag ncig kev cob qhia, thaum txheej txheej puas lawm, xeb pib nkag mus rau cov hlau ntawm qhov chaw ntawd.
304 Stainless Hlau: "Lub Hnub Qub Cov Tub Kawm Ntawv" ntawm xeb kuj
304 yog austenitic stainless hlau uas muaj tshaj 18% chromium thiab tshaj 8% npib tsib xee. Chromium tsim ib qho ultra-thin oxide zaj duab xis rau ntawm qhov chaw uas thaiv cov pa thiab dej- ua rau nws tsis muaj xeb- tiv taus.
Dab tsi yog qhov txawv ntawm 200, 300, thiab 400 series stainless hlau?
304 tuav cov chaw ntub dej, dej pos huab, thiab cov kua qaub me me lossis alkalis tau yooj yim. Nws yuav tsum tsis muaj roj, tsis muaj plating, thiab kev saib xyuas tsawg.
Txawm li cas los xij, cov khoom siv kho tshuab ntawm 304 poob qis ntawm 45 # steel.
304 muaj cov ntsiab lus carbon tsuas yog kwv yees li 0.12%, qis dua li ntawm 45 # hlau. Nws hardness tsawg dua los yog sib npaug rau HB 187, tensile lub zog yog ntau dua los yog sib npaug rau 520 MPa, thiab yield zog ntau dua los yog sib npaug rau 205 MPa.
Cov naj npawb qhia ib zaj dab neeg meej: nws poob qis hauv qhov tawv, lub zog, thiab hnav tsis kam. 304 stainless hlau muaj lwm qhov teeb meem zais: nws yog qhov ua rau "galling" (seizing).
Vim nws cov ductility siab, 304 yog qhov ua rau cov vuam txias, cov khoom siv adhesion, thiab ntes thaum ua ke nrog cov bearings lossis bushings thaum lub sijhawm ua haujlwm ntev -ua rau disassembly nyuaj heev. Qhov no ua rau muaj teeb meem loj rau cov khoom siv uas yuav tsum tau saib xyuas tsis tu ncua lossis disassembly.
[Duab]
Yog li, vim li cas lub tuam txhab xaiv 304?
Cia peb rov mus saib qhov xwm txheej thawj zaug: lub feeder ncej-thawj yog ua los ntawm 45# steel- yog xeb, yog li nws tau hloov nrog 304.
Los ntawm ib qho kev pom, lub tuam txhab yuav ua tau cov kev lag luam hauv qab no -offs:
Ua ntej, cov kev ua haujlwm ua haujlwm ua rau kev tiv thaiv xeb yog qhov kev txhawj xeeb tseem ceeb. Lub feeder ua haujlwm hauv qhov chaw ntub dej; ncej xeb tsis tsuas yog shortens kev pab cuam lub neej tab sis kuj tuaj yeem kis cov khoom ua tiav. Tsis tas li siv roj rau kev saib xyuas tas li, nws ua rau muaj kev nkag siab zoo dua los hloov mus rau "teeb" -nws-thiab-tsis nco qab- nws" cov khoom.
Qhov thib ob, cov neeg kho tshuab load ntawm lub ncej yuav tsawg. Yog hais tias tus ncej tsuas yog xa cov lus tsa suab hauv qab lub teeb, lub zog ntawm 304 yog ntau tshaj qhov tsim nyog. Tsis tas yuav tau them nqi ntxiv rau kev kho saum npoo kom ua tiav qib siab uas tsis xav tau tiag tiag.
Thib peb, nws simplifies tus txheej txheem. Kev yuav khoom tsuas yog yuav 304 round bar Tshuag, tshuab nws, sib sau ua ke, thiab txoj haujlwm tiav. Tsis tas yuav tsum muaj kev kho cua sov, ua kom tiav, lossis kev txhawj xeeb txog kev saib xyuas tsis tu ncua.
Tau kawg, muaj lwm txoj kev xaiv.
Yog tias ob qho tib si xeb thiab hnav tsis kam, 2Cr13 yog qhov kev xaiv zoo dua. Raws li martensitic stainless hlau, nws tuaj yeem ua tiav qhov hardness ntawm HRC 45-50 tom qab quenching, muab qhov sib npaug ntawm lub zog, hnav tsis kam, thiab xeb kuj. Nws yog qhov tsim nyog tshaj 304 rau kev thauj khoom -cov kabmob shafts.
Yog tias ua raws li 45 # steel, kev sib xyaw ua ke ntawm quench - thiab - kev kho kub thiab tawv chrome plating kuj tseem tuaj yeem daws qhov teeb meem xeb- feem ntau ntawm tus nqi qis dua 304. Txoj hauv kev no khaws cov khoom hardness, lub zog, thiab hnav tsis kam thaum muab kev tiv thaiv xeb zoo heev.
Thaum kawg, xaiv 304 tsis yog qhov kev daws teeb meem "zoo tshaj"; nws yog ib qho kev xaiv raws li qhov kev ntsuam xyuas sib npaug - muab qhov tseem ceeb rau kev daws teeb meem uas tsuas yog "zoo txaus."
Qhov siab tshaj plaws xeb tsis kam, lub zog txaus, thiab qhov cuam tshuam tsawg kawg nkaus - uas yog cov lus teb.
