quenching thiab tempering kub kho ntawm 40Cr steel?

Dab tsi yog quenching thiab tempering tshav kub kho ntawm40 Cr steel hlau?

40Cr txhim kho lub hardenability ntawm hlau, txhim khu nws lub zog thiab tempering stability, thiab muaj zoo heev mechanical zog.Cov khoom ua haujlwm nrog qhov loj me me lossis kev hloov kho tseem ceeb yuav tsum siv Cr steel, tab sis Cr steel muaj ob hom temper brittleness.

Peb yuav ua li cas thiaj li muaj kev kub ntxhov thiab kev kho cua sov ntawm 40Cr workpieces thiab ntau yam txheej txheem daim npav cov cai hauv kev ua haujlwm?

(1) Tom qab quenching thiab tempering kub kho ntawm 40Cr workpieces, roj txias yuav tsum tau siv.40Cr steel muaj cov khoom zoo quenching, tuaj yeem ua kom txias los ntawm cov roj, thiab qhov nyiam ntawm workpieces rau deform thiab tawg yog me me.Txawm li cas los xij, cov lag luam me thiab nruab nrab tuaj yeem cuam tshuam tsis zoo li cov khoom ua haujlwm hauv dej thaum refueling nruj, tab sis tsis pom muaj kab nrib pleb.Txawm li cas los xij, cov neeg ua haujlwm yuav tsum nruj me ntsis tswj cov dej thiab nws qhov kub thiab txias raws li kev paub dhau los.

(2) Tom qab tempering, lub hardness ntawm 40Cr workpiece yog tseem kuj siab, thiab lub thib ob tempering kub yuav tsum tau nce los ntawm 20-50.Txwv tsis pub, nws yog ib qho nyuaj rau txo cov hardness.

(3) Tom qab qhov kub thiab txias ntawm 40Cr workpieces, cov duab nyuaj yog txias hauv cov roj thiab yooj yim hauv dej kom tsis txhob muaj kev cuam tshuam ntawm ob hom tempering brittleness.Lub workpiece tom qab tempering sai thiab txias yuav tsum tau kho nrog kev ntxhov siab yog tias tsim nyog.Muaj peb yam uas cuam tshuam rau qhov zoo ntawm qhov hloov kho workpiece, thiab theem ntawm tus neeg teb xov tooj yog qhov tseem ceeb.Kuj tseem muaj ntau yam laj thawj xws li cov khoom siv, cov khoom siv, thiab kev hloov kho ua ntej.Peb ntseeg hais tias (1) qhov ceev ntawm lub workpiece txav los ntawm lub cub tawg mus rau lub tank txias yog qeeb, thiab qhov kub ntawm workpiece nkag mus rau hauv dej tau poob qis dua qhov tseem ceeb point ntawm Ar3, uas ua rau ib nrab decomposition thiab tsis tiav microstructure ntawm lub workpiece. , uas tsis tau raws li qhov yuav tsum tau hardness.Yog li ntawd, lub coolant rau qhov me me yuav tsum tau them sai sai rau kev ceev, thaum lub workpieces loj kom txias, nws yog tsim nyog los tuav lub sij hawm.(2) Tus nqi ntawm cov khoom ua haujlwm melting rauv yuav tsum tsim nyog, nrog 1-2 txheej tsim nyog.Thaum lub workpiece overlaps nrog ib leeg, cov cua sov yog tsis sib xws thiab hardness yog uneven.(3) Kev npaj cov dej nkag mus rau hauv qhov chaw ua haujlwm yuav tsum tau khaws cia ntawm qhov deb.Vim yog nruj heev, lub vapor zaj duab xis nyob ze ntawm lub workpiece yog tawg thiab hindered, uas ua rau ib tug qis deg hardness ntawm workpiece.(4) Qhib lub qhov cub rau quenching tsis tuaj yeem quenched ib zaug.Nws yog ib qho tsim nyog yuav tsum tua lub cub tawg nruab nrab thiab rov ua kom sov raws li qhov ntsuas kub ntawm qhov cub.Lub hardness ntawm lub hauv ntej thiab nram qab workpieces tom qab quenching yuav tsum zoo ib yam.(5) Ua tib zoo saib xyuas qhov kub ntawm cov dej txias.10% ntawm cov dej ntsev tshaj 60 tsis tuaj yeem siv.Cov dej txias yuav tsum tsis muaj impurities xws li roj thiab av nkos.Txwv tsis pub, tsis txaus lossis tsis sib xws yuav tshwm sim.(6) Kev hloov kho tsis sib xws ntawm cov khoom tsis ua tiav.Yuav kom ua tiav qhov kev hloov kho zoo, cov khoom siv raw yuav tsum yog cov tshuaj yej ntxhib, thiab cov puav yuav tsum tau siv zog.(7) Tom qab kev tswj hwm nruj, qhov hardness txo qis los ntawm 1-3 units tom qab quenching, thiab tempering kub tuaj yeem hloov kho kom tau raws li qhov yuav tsum tau ua.Txawm li cas los xij, tom qab qhov hluav taws kub, qhov hardness ntawm lub workpiece yog tsawg heev, thiab tsuas yog HRC250000 mus rau 350000 tuaj yeem ignited dua.Nws tsis tuaj yeem tsuas yog ntxiv qhov nruab nrab lossis qis qis kom ua tau raws li qhov xav tau ntawm kev kos duab.Txwv tsis pub, qhov tseem ceeb ntawm tus tswj hwm yuav ploj mus, ua rau muaj kev cuam tshuam loj heev.