Hardness yuav tsum thiab kev kho cua sov ntawm kev sib tsoo nruab nrab steel hlau

Tus nqi ntawm lub pob zeb ntawm qhov sib tsoo steel hlau tuaj yeem nce mus rau qee lub sijhawm, tab sis tom qab lub sijhawm, qhov kev ua kom zis nce tsis pom tseeb thiab lub sijhawm ntev, kev ua haujlwm tau zoo tsawg tsawg, thiab qhov tawg thiab kev puas tsuaj pob npoo yog yooj yim tshwm sim. Qhov sib txawv ntawm pob thiab pob yog qhov zoo heev. Yog li ntawd, nws yog ib qhov tsim nyog los txo lub sij hawm txhawb ntxiv, thiab nyob hauv qhov tsim nyog ntawm txoj kev ua kom tsis muaj qhov sib txawv, qhov sib txawv ntawm cov ncej puab thiab lub ntiaj teb kev qis qis qis dua, thiab cov qauv ntawm cov hlau thiab lub pob zeb ntawm cov pob zeb tawg yog nyob hauv ib lub xeev qib siab.

Thaum pib ntawm kev ruaj khov nruab nrab ntawm pob zeb, lub zog ntawm cov hlau pob yuav nce ceev ceev, thiab lub hardness ntawm lub pob zeb steel yuav nce ceev nrawm ntawm pib ntawm lub strengthening theem. Lub uniformity ntawm lub npas thiab lub ntsej muag aberration ntawm uniformity feem ntau sawv, ncav lub ncov ntawm li 2 mus rau 4 xuab moos; tom qab ntawd pib poob, thiab qhov qis tshaj plaws tshwm rau ntawm 4 txog 6 teev.

Lub zog ntawm lub strengthening lub sij hawm ntawm kev sib tsoo steel pob ntawm lub qauv metallographic, tom qab kho cov cua sov, lub cev metallographic qauv yog martensite thiab khaws cia austenite. Martensite muaj hom dislocation hom thiab ntxaib siv lead ua. Lub hom dislocation yog lath-zoo li, heev tsis ncaj ncees. Nws tuaj yeem tsis hnyav tom qab txhim kho. Daim duab ntxaib siv ntxaib yog daim ntxoov ntxoo, zoo nkauj heev, thiab nws tau tawg tom qab kev txhim kho, uas yuav ntxias cov kab nrib pleb. Qhov ntau lawm.

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