Kub thiab lub sijhawm ntawm cov saw hlau: kev tshuaj xyuas cov txheej txheem tseem ceeb
Hauv thaj chaw ntawm kev sib kis tshuab,cov saw hlauyog ib qho tseem ceeb, thiab nws cov kev ua tau zoo cuam tshuam ncaj qha rau kev ua haujlwm zoo thiab kev ntseeg siab ntawm cov khoom siv kho tshuab. Kev quenching, ua cov txheej txheem kho cua sov tseem ceeb hauv kev tsim cov saw hlau, ua lub luag haujlwm tseem ceeb hauv kev txhim kho nws lub zog, qhov nyuaj, kev tiv thaiv kev hnav thiab lub neej qaug zog. Tsab xov xwm no yuav tshawb nrhiav tob txog cov ntsiab cai txiav txim siab ntawm cov saw hlau quenching kub thiab lub sijhawm, cov txheej txheem txheej txheem ntawm cov ntaub ntawv siv, kev tswj hwm txheej txheem thiab cov kev txhim kho tshiab, lub hom phiaj yog muab cov ntaub ntawv qhia txog kev siv tshuab rau cov tuam txhab tsim cov saw hlau thiab cov neeg yuav khoom lag luam thoob ntiaj teb, los pab lawv nkag siab tob txog qhov cuam tshuam ntawm cov txheej txheem quenching rau kev ua haujlwm ntawm cov saw hlau thiab txiav txim siab ntau ntxiv txog kev tsim khoom thiab kev yuav khoom.
1. Cov ntsiab lus tseem ceeb ntawm kev quenching cov saw hlau
Kev ua kom tsis kub yog ib qho txheej txheem kho cua sov uas ua rau cov saw hlau kub mus rau qee qhov kub thiab txias, ua kom nws sov rau ib lub sijhawm, thiab tom qab ntawd txias sai. Nws lub hom phiaj yog los txhim kho cov khoom siv kho tshuab ntawm cov saw hlau, xws li qhov nyuaj thiab lub zog, los ntawm kev hloov pauv cov qauv metallographic ntawm cov khoom. Kev txias sai hloov pauv austenite mus rau hauv martensite lossis bainite, muab cov saw hlau zoo heev.
2. Lub hauv paus rau kev txiav txim siab qhov kub thiab txias
Cov ntsiab lus tseem ceeb ntawm cov ntaub ntawv: Cov saw hlau ntawm cov ntaub ntawv sib txawv muaj cov ntsiab lus tseem ceeb sib txawv, xws li Ac1 thiab Ac3. Ac1 yog qhov kub siab tshaj plaws ntawm thaj chaw pearlite thiab ferrite ob-theem, thiab Ac3 yog qhov kub qis tshaj plaws rau kev ua kom tiav austenitization. Qhov kub quenching feem ntau yog xaiv saum toj no Ac3 lossis Ac1 kom ntseeg tau tias cov ntaub ntawv tau austenitized tag nrho. Piv txwv li, rau cov saw hlau ua los ntawm 45 hlau, Ac1 yog li 727 ℃, Ac3 yog li 780 ℃, thiab qhov kub quenching feem ntau yog xaiv ntawm li 800 ℃.
Cov khoom siv sib xyaw thiab kev ua tau zoo: Cov ntsiab lus ntawm cov khoom sib xyaw ua ke cuam tshuam rau qhov tawv thiab kev ua tau zoo ntawm cov saw hlau. Rau cov saw hlau uas muaj cov ntsiab lus ntau ntawm cov khoom sib xyaw, xws li cov saw hlau sib xyaw ua ke, qhov kub quenching tuaj yeem nce ntxiv kom tsim nyog kom ua rau qhov tawv thiab xyuas kom meej tias lub hauv paus kuj tuaj yeem tau txais qhov tawv thiab lub zog zoo. Rau cov saw hlau uas muaj cov pa roj carbon tsawg, qhov kub quenching yuav tsum tsis txhob siab dhau kom tsis txhob muaj kev oxidation hnyav thiab decarburization, uas cuam tshuam rau qhov zoo ntawm qhov chaw.
Kev tswj qhov loj ntawm cov noob austenite: cov noob austenite zoo tuaj yeem tau txais cov qauv martensite zoo tom qab quenching, yog li cov saw hlau muaj zog dua thiab tawv dua. Yog li ntawd, qhov kub quenching yuav tsum tau xaiv hauv qhov ntau uas tuaj yeem tau txais cov noob austenite zoo. Feem ntau hais lus, thaum qhov kub nce siab, cov noob austenite feem ntau loj hlob, tab sis kev nce qhov txias lossis kev siv cov txheej txheem ntsuas los ua kom cov noob zoo tuaj yeem tiv thaiv kev loj hlob ntawm cov noob mus rau qee qhov.
3. Cov yam tseem ceeb uas txiav txim siab lub sijhawm quenching
Qhov loj thiab cov duab ntawm cov saw hlau: cov saw hlau loj dua yuav tsum siv sijhawm ntev dua los ua kom sov tau mus rau sab hauv thiab tag nrho cov seem hla tau sib npaug. Piv txwv li, rau cov phaj saw hlau uas muaj cov kab uas loj dua, lub sijhawm ua kom sov tuaj yeem ntev dua.
Txoj kev thauj khoom thiab kev teeb tsa ntawm lub cub tawg: Kev thauj khoom ntau dhau ntawm lub cub tawg lossis kev teeb tsa tuab dhau yuav ua rau cov saw hlau kub tsis sib xws, ua rau muaj kev sib xyaw tsis sib xws. Yog li ntawd, thaum txiav txim siab lub sijhawm quenching, nws yog qhov tsim nyog los xav txog qhov cuam tshuam ntawm txoj kev thauj khoom thiab kev teeb tsa ntawm lub cub tawg rau kev hloov pauv cua sov, nce lub sijhawm tuav kom tsim nyog, thiab xyuas kom meej tias txhua txoj saw hlau tuaj yeem ua tiav qhov cuam tshuam zoo tshaj plaws.
Qhov kub thiab txias ntawm lub cub tawg sib npaug thiab qhov ceev ntawm cua sov: Cov khoom siv cua sov uas muaj qhov kub thiab txias zoo sib npaug tuaj yeem ua rau txhua qhov ntawm cov saw hlau dov kom sov sib npaug, thiab lub sijhawm xav tau kom ncav cuag tib qhov kub luv dua, thiab lub sijhawm tuav tuaj yeem txo qis raws li. Qhov ceev ntawm cua sov kuj tseem yuav cuam tshuam rau qib ntawm austenitization. Kev cua sov sai tuaj yeem luv lub sijhawm kom ncav cuag qhov kub thiab txias, tab sis lub sijhawm tuav yuav tsum xyuas kom meej tias austenite tau sib npaug tag nrho.
4. Kub thiab lub sijhawm quenching ntawm cov khoom siv sib txuas ntawm cov menyuam
Cov hlau carbon roller saw
45 hlau: Qhov kub quenching feem ntau yog 800 ℃ -850 ℃, thiab lub sijhawm tuav yog txiav txim siab raws li qhov loj ntawm cov saw hlau thiab lub cub tawg loading, feem ntau nyob ib ncig ntawm 30 feeb-60 feeb. Piv txwv li, rau cov saw hlau me me 45 hlau, qhov kub quenching tuaj yeem xaiv tau li 820 ℃, thiab lub sijhawm rwb thaiv tsev yog 30 feeb; rau cov saw hlau loj, qhov kub quenching tuaj yeem nce mus txog 840 ℃, thiab lub sijhawm rwb thaiv tsev yog 60 feeb.
T8 hlau: Qhov kub quenching yog li 780 ℃ -820 ℃, thiab lub sijhawm rwb thaiv tsev feem ntau yog 20 feeb - 50 feeb. T8 hlau roller saw hlau muaj qhov nyuaj dua tom qab quenching thiab tuaj yeem siv rau hauv cov xwm txheej kis nrog cov khoom thauj loj.
Cov hlau sib xyaw ua ke
20CrMnTi hlau: Qhov kub quenching feem ntau yog 860 ℃ -900 ℃, thiab lub sijhawm rwb thaiv tsev yog 40 feeb - 70 feeb. Cov khoom siv no muaj qhov tawv zoo thiab hnav tsis kam, thiab siv dav hauv cov saw hlau hauv tsheb, maus taus thiab lwm yam lag luam.
40Cr hlau: Qhov kub quenching yog 830 ℃ -860 ℃, thiab lub sijhawm rwb thaiv tsev yog 30 feeb - 60 feeb. 40Cr hlau roller saw hlau muaj lub zog siab thiab toughness, thiab dav siv hauv kev lag luam kis tau tus mob.
Cov saw hlau tsis xeb: Piv txwv li, siv 304 stainless hlau ua piv txwv, nws qhov kub thiab txias feem ntau yog 1050 ℃ -1150 ℃, thiab lub sijhawm rwb thaiv tsev yog 30 feeb - 60 feeb. Cov saw hlau tsis xeb muaj kev tiv thaiv xeb zoo thiab tsim nyog rau tshuaj lom neeg, khoom noj thiab lwm yam lag luam.
5. Kev tswj cov txheej txheem quenching
Kev tswj cov txheej txheem cua sov: Siv cov khoom siv cua sov siab heev, xws li lub cub tawg uas tswj tau huab cua, kom tswj tau qhov kub thiab huab cua hauv lub cub tawg kom raug kom txo tau qhov oxidation thiab decarburization. Thaum lub sijhawm ua kom sov, tswj qhov kub thiab txias ua ntu zus kom tsis txhob muaj kev hloov pauv ntawm cov saw hlau lossis kev ntxhov siab thermal los ntawm kev nce kub sai sai.
Xaiv cov khoom siv quenching thiab kev tswj cov txheej txheem txias: Xaiv cov khoom siv quenching uas tsim nyog raws li cov khoom siv thiab qhov loj ntawm cov saw hlau, xws li dej, roj, polymer quenching kua, thiab lwm yam. Dej muaj qhov ceev txias sai thiab haum rau cov saw hlau me me; roj muaj qhov ceev txias qeeb thiab haum rau cov saw hlau loj dua lossis cov hlau alloy. Thaum lub sijhawm txias, tswj qhov kub, kev sib xyaw ceev thiab lwm yam ntawm cov khoom siv quenching kom ntseeg tau tias txias sib xws thiab zam kev tawg quenching.
Kev Kho Mob Tempering: Cov saw hlau tom qab quenching yuav tsum tau tempered raws sijhawm kom tshem tawm kev ntxhov siab quenching, ruaj khov cov qauv thiab txhim kho kev tawv. Qhov kub tempering feem ntau yog 150 ℃ -300 ℃, thiab lub sijhawm tuav yog 1 teev - 3 teev. Kev xaiv qhov kub tempering yuav tsum tau txiav txim siab raws li kev siv thiab qhov nyuaj ntawm cov saw hlau. Piv txwv li, rau cov saw hlau uas xav tau qhov nyuaj siab, qhov kub tempering tuaj yeem txo qis kom haum.
6. Kev tsim kho tshiab tshaj plaws ntawm kev siv tshuab quenching
Cov txheej txheem quenching isothermal: Los ntawm kev tswj qhov kub ntawm qhov nruab nrab quenching, cov saw hlau yog isothermally nyob hauv austenite thiab bainite transformation kub ntau yam kom tau txais cov qauv bainite. Isothermal quenching tuaj yeem txo qhov quenching deformation, txhim kho qhov tseeb ntawm qhov ntev thiab cov khoom siv kho tshuab ntawm cov saw hlau, thiab nws yog qhov tsim nyog rau kev tsim qee cov saw hlau siab-precision. Piv txwv li, cov txheej txheem isothermal quenching ntawm C55E steel saw hlau phaj yog quenching kub 850 ℃, isothermal kub 310 ℃, isothermal lub sijhawm 25 feeb. Tom qab quenching, qhov nyuaj ntawm cov saw hlau phaj ua tau raws li cov kev cai, thiab lub zog, qaug zog thiab lwm yam khoom ntawm cov saw hlau yog ze rau cov khoom ntawm 50CrV kho nrog tib cov txheej txheem.
Cov txheej txheem quenching qib: Cov saw hlau dov ua ntej txias hauv qhov nruab nrab ntawm qhov kub siab dua, thiab tom qab ntawd txias hauv qhov nruab nrab ntawm qhov kub qis dua, yog li cov qauv sab hauv thiab sab nraud ntawm cov saw hlau dov tau hloov pauv sib npaug. Maj mam quenching tuaj yeem txo qhov kev ntxhov siab quenching, txo cov qhov tsis zoo quenching, thiab txhim kho qhov zoo thiab kev ua tau zoo ntawm cov saw hlau dov.
Kev siv computer simulation thiab optimization technology: Siv computer simulation software, xws li JMatPro, los simulate cov txheej txheem quenching ntawm cov saw hlau, kwv yees cov kev hloov pauv hauv kev teeb tsa thiab kev ua tau zoo, thiab optimize cov txheej txheem quenching. Los ntawm kev simulation, qhov cuam tshuam ntawm cov kub thiab lub sijhawm quenching sib txawv rau kev ua tau zoo ntawm cov saw hlau tuaj yeem nkag siab ua ntej, tus lej ntawm kev sim tuaj yeem txo qis, thiab kev ua haujlwm ntawm kev tsim cov txheej txheem tuaj yeem txhim kho.
Hauv kev xaus, qhov kub thiab lub sijhawm quenching ntawm cov saw hlau yog cov txheej txheem tseem ceeb uas cuam tshuam rau nws qhov kev ua tau zoo. Hauv kev tsim khoom tiag tiag, nws yog qhov tsim nyog los xaiv qhov kub thiab lub sijhawm quenching raws li cov khoom siv, qhov loj me, kev siv thiab lwm yam ntawm cov saw hlau, thiab tswj hwm cov txheej txheem quenching kom tau txais cov khoom lag luam zoo thiab ua tau zoo. Tib lub sijhawm, nrog rau kev txhim kho tas mus li thiab kev tsim kho tshiab ntawm cov thev naus laus zis quenching, xws li isothermal quenching, graded quenching thiab kev siv cov thev naus laus zis computer simulation, qhov zoo ntawm kev tsim khoom thiab kev ua haujlwm ntawm cov saw hlau yuav raug txhim kho ntxiv kom tau raws li qhov kev thov ntawm kev lag luam.
Lub sijhawm tshaj tawm: Tsib Hlis-09-2025