Zam tximTom qab quenching, martensite thiab khaws cia tsis ruaj khov, lawv muaj cov kev hloov pauv ntawm cov pa roj teeb kom ua rau lub zog ua haujlwm kom tsis txhob ua haujlwm kom sib npaug ntawm lub koom haum cov txheej txheem, tus txheej txheem no yog nyob ntawm cov kev tso cai atomic thiab diffusation ua ke, nrog kev nce siab ntawm kev tsis quav ntsej tias yuav tsis quav ntsej yauv ua kev hloov pauv. Raws li cov xwm txheej ntawm microstructure kev hloov pauv, ntsuas kub feem ntau muab faib ua plaub ntu, kev sib tw ntawm carbide tsub kev loj hlob thiab ferrite recrystallization.
Thawj theem (200)
(1) kev zamTempering martension decompose nyob rau hauv 80 kub tempering, martensing kev hloov pauv, tsis muaj hnub pib ua ntu zus, ua nag tsis tshua muaj neeg saib xyuas Pawg Martensite hauv Carbon Forgings Nyob rau hauv cov theem no, vim tias cov pa roj cua tsis txaus, yog li nws tseem muaj nag los nag lossis daus ntawm martensite. Cov qauv sib xyaw ntawm cov khoom muaj peev xwm qis martensite thiab carbide zoo heev yog hu ua tempered martensite.

(2)kev zamTempering hauv theem thib ob (200-300), cov seem ntawm kev hloov pauv mus txog xyoo 200-300, qhov kev txiav txim siab tseem ceeb ntawm cov khoom seem ntawm kev nthuav dav tau dhau los ntawm kev nthuav dav ntawm cov pa roj carbon atoms Txhawm rau ua ib feem ib nrab, thiab tom qab ntawd decomposed rau hauv alpha theem thiab sib tov ntawm lub koom haum carbide, uas yog tsim ntawm bainite steel hardness tsis yog obvious txo nyob rau theem no
(3)Qeb peb (250-400) kev hloov pauv carbide ntawm forging npau taws yog nyob rau hauv qhov ntsuas kub no. Vim yog cov ntsuas kub siab, carbon at diffusion muaj zog, martstitual muaj peev xwm rov qab los ua kev hloov pauv thiab kev hloov pauv ntawm carbides, qhov qis dua ntawm martensite nyob rau hauv carbon matal feem, martensite lattice distortion, tau txais ferritic mranular, tau txais kev hloov pauv me me, hartension cov kev ntxhov siab, hardness, kev nruj me ntsis tau txhim kho

(4)Lub Plaub Theem ntawm Forging Tempering (& GT; 400) muaj peev xwm ua kom muaj zog heev, cov theem thib peb ntawm kev ua kom khov kho yuav txuas ntxiv mus ntxiv thiab loj hlob nce nyob rau hauv ntau dua 500-600, alpha recrystallization tshwm sim maj mam faib rau hauv lub koom haum ua ib pawg peel ntxaij, cov pab pawg hu ua ferritic sorbite temple nrog cov neeg siv tshuab zoo heev Cov yam ntxwv ntawm theem thiab Lattice distortion tshem tawm sab hauv kev ntxhov siab.

(Txij 168 Forging Net)