Yuav ua li cas carburize thiab kub kho camshafts?

1. Direct quenching tom qab carburizing muaj qhov zoo ntawm kev ua haujlwm siab, tus nqi qis, thiab oxidative decarburization. Txawm li cas los xij, vim qhov kub siab carburizing, cov nplej austenite loj hlob, lub martensite yog coarser tom qab quenching, thiab cov austenite khaws cia tseem muaj ntau lub cev, yog li hnav tsis kam thiab toughness tsis zoo. Tsuas yog tsim rau intrinsically fine-grained steel thiab qhov chaw uas tsis muaj hnav tsis kam yuav tsum los yog tsawg load-bearing qhov chaw

2. Ib zaug quenching yog tom qab carburizing maj mam txias, thiab ces reheated rau ib tug kub siab tshaj qhov tseem ceeb kub thiab ces quenched. Piv nrog rau quenching ncaj qha, ib zaug quenching tuaj yeem kho cov qauv steel rau qee yam. Thaum cov kev xav tau ntawm cov txheej txheem tseem ceeb yog siab, cov cua kub ntawm lub quenching yog me ntsis siab dua Ac3. Rau qhov chaw uas tsis hnyav hnyav tab sis muaj kev hnav tsis kam thiab siab dua hardness kev ua tau zoo ntawm qhov chaw. Lub quenching kub yuav tsum yog 30 ℃ ~ 50 ℃ saum Ac1, yog li ntawd cov txheej saum npoo ntawm cov nplej yuav ua kom zoo dua qub, tab sis cov txheej txheem tseem ceeb yuav tsis raug kho kom zoo, thiab kev ua haujlwm yuav tsis zoo dua.

3. Secondary quenching Rau cov hlau uas muaj cov cuab yeej siv siab lossis cov hlau tseem ceeb, cov quenching thib ob yuav tsum tau siv. Lub hom phiaj ntawm thawj quenching yog los txhim kho cov txheej txheem tseem ceeb, thiab cov cua kub kub yog 30 ℃ ~ 50 ℃ saum Ac3. Lub hom phiaj ntawm qhov thib ob quenching yog los kho cov txheej txheem txheej txheej kom tau txais cov martensite zoo thiab sib npaug faib granular theem nrab cementite. Cov cua kub kub yog 30 ℃ ~ 50 ℃ saum Ac1.

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