45 # steel hardness tom qab quenching thiab tempering

Lub hardness ntawm 45 # steel quenched thiab tempered qhov chaw tom qab quenching yuav tsum ncav cuag HRC56 ~ 59, thiab muaj peev xwm ntawm loj cross-section yog qis dua, tab sis nws tsis tuaj yeem qis dua HRC48.

Quenched thiab tempered ntawm 45 # steel 45 # steel yog nruab nrab-carbon structural steel nrog zoo txias thiab kub workability, zoo mechanical zog, tsis tshua muaj nqi thiab dav qhov chaw, yog li nws yog dav siv. Nws qhov tsis muaj zog loj tshaj plaws yog tias nws muaj qhov hardenability tsawg, qhov loj hla ntu qhov ntev thiab cov kev xav tau siab rau cov khoom siv uas tsis haum rau kev siv.

Yuav

Lub quenching kub ntawm 45 # steel yog A3 + (30 ~ 50) ℃. Hauv kev ua haujlwm tiag tiag, qhov kev txwv sab saud feem ntau yog coj. Qhov kub quenching ntau dua tuaj yeem ua kom cov cua sov ntawm qhov chaw ua haujlwm, txo qhov oxidation ntawm qhov chaw, thiab txhim kho kev ua haujlwm. Yuav kom homogenize lub austenite ntawm lub workpiece, txaus tuav lub sij hawm yuav tsum tau. Yog tias qhov tseeb ntawm qhov cub ntsia tau loj, lub sijhawm tuav yuav tsum tau txuas ntxiv kom tsim nyog. Txwv tsis pub, tej zaum yuav tsis txaus hardness vim cua sov tsis sib xws. Txawm li cas los xij, yog tias lub sijhawm tuav ntev dhau lawm, cov nplej ntxhib thiab hnyav oxidative decarburization tseem yuav tshwm sim.

Yuav

quenching thiab tempering: quenching thiab tempering yog ob qho kev kho cua sov ntawm quenching thiab kub tempering, thiab nws lub hom phiaj yog ua kom lub workpiece muaj cov khoom zoo txhua yam. Quenched thiab tempered steel muaj ob pawg: carbon quenched thiab tempered steel thiab alloy quenched thiab tempered steel. Txawm hais tias nws yog carbon hlau los yog hlau alloy, nws cov ntsiab lus carbon yog tswj nruj me ntsis. Yog tias cov ntsiab lus carbon siab dhau lawm, lub zog ntawm lub workpiece tom qab quenching thiab tempering yog siab, tab sis lub toughness tsis txaus. Yog tias cov ntsiab lus carbon tsawg dhau, qhov toughness yuav nce thiab lub zog yuav tsis txaus.