⑴ Nto Queenenching:
Yog cov hlau ntawm cov hlau los ntawm cov cua kub sai rau qhov kub tseem ceeb tshaj plaws, yog li txheej ua ntej txias, yog li txheej nrawm dua hauv Martensitic cov ntaub so ntswg, thiab cov tub ntxhais tsis tau dhau los Phase hloov pauv, uas paub txog saum npoo tawv thiab cov tub ntxhais tsis hloov pauv. Haum rau nruab nrab cov pa roj carbon hlau.

⑵ Kev Kho Tshuaj Kub: Kho:
Hais txog cov tshuaj lom neeg atoms, nrog lub peev xwm ntawm cov tshuaj dog dig thiab cov qauv txheej txheem ntawm cov txheej txheem saum npoo av, yog li kom ua tiav txheej txheej saum npoo hlau Nrog rau kev cai tshwj xeeb ntawm lub koom haum thiab kev ua tau zoo ntawm kev kho vaj kub. Raws li cov hom infiltration ntsiab, tshuaj kho cov tshuaj cua sov tuaj yeem faib ua carburizing, Nitriving, Cyanidation txoj cai lij choj.
Carburizing: carburizing yog txheej txheem los ntawm cov pa roj carbon atoms nkag mus rau saum npoo hlau. Kuj yog ua kom cov roj av qis carbon steel ua haujlwm nrog cov roj carbon hlau nyob hauv lub zog ua haujlwm, yog li ntawd cov txheej txheem saum npoo av muaj siab, thiab nruab nrab ntawm cov haujlwm ua haujlwm tseem tuav Tougness thiab cov yees siv ntawm cov hlau tsis muaj roj.
Nitriving, los yog Nitriving, yog tus txheej txheem los ntawm cov txheej txheej saum npoo hlau ntawm cov hlau genetrates nitrogen atoms. Lub hom phiaj yog txhawm rau txhim kho lub hardness thiab hnav tsis kam ntawm cov txheej saum npoo thiab txhim kho lub zog qaug zog thiab corrosion tsis kam. Tam sim no, cov roj nitriving txoj kev siv nyob rau hauv kev tsim khoom.
CyanIDation, kuj paub tias yog carbonitriving, yog ib txhij infiltration carbon thiab nitrogen atoms rau hauv steel. Nws ua rau saum npoo hlau carburizing thiab nitriding yam ntxwv.
Hlau nkag mus: yog hais txog kev nkag mus ntawm cov hlau atoms rau hauv txheej txheem ntawm cov hlau. Nws yog kom ua rau txheej txheej saum hlau ntawm kev sib cais hlau, txhawm rau ua kom cov kab mob sib txawv, cov hlau sib txawv, oxidation tsis kam, thiab lwm yam. Siv ntau lawm hauv kev tsim cov Aluminic, chromizing, boronizing, silicon thiab lwm yam.