Cam khwb cia hlau yog ib hom casting alloy. Tam sim no, cam khwb cia hlau feem ntau yog siv los tsim qee qhov chaw nrog cov duab nyuaj, nyuaj rau forge lossis txiav, thiab xav tau lub zog siab thiab plasticity.
Cam khwb cia hlau tau muab faib ua carbon cam khwb cia hlau thiab alloy cam khwb cia hlau raws li tshuaj muaj pes tsawg leeg. Carbon cam khwb cia hlau yog muab faib ua: tsawg carbon cam khwb cia hlau nrog C ≤ 0.20%; C0.2 ~ 0.5% yog nruab nrab carbon steel; C ≥ 0.5% yog cov pa roj carbon siab.
cam khwb cia hlau yog muab faib ua cov hlau tsis tshua muaj hlau (tag nrho cov ntsiab lus ntawm cov ntsiab lus dav dav yog tsawg dua 8%) thiab cov hlau alloy siab (tag nrho cov ntsiab lus ntawm cov ntsiab lus alloy yog ntau dua 8%).
Cam khwb cia hlau tuaj yeem muab faib ua cov qauv cam khwb cia hlau, hnav-tiv taus cam khwb cia hlau, stainless cam khwb cia hlau, kub-resistant cam khwb cia hlau thiab cuab yeej cam khwb cia hlau.
Cam khwb cia hlau tuaj yeem muab faib ua pearlitic cam khwb cia hlau, ferritic cam khwb cia hlau, martensitic cam khwb cia hlau thiab austenitic cam khwb cia hlau.
Cam khwb cia hlau yog ib hom casting. Yog li ntawd, forging tsim workpieces tuaj yeem txhim kho cov txheej txheem sab hauv ntawm lub koom haum, nrog cov khoom siv zoo thiab cov khoom zoo sib xws. Cov khoom tseem ceeb thiab ua haujlwm hnyav yuav tsum tau forged. Kuv ntseeg tias ntau tus casters yuav tsum tau them sai sai rau cov ntsiab lus tseem ceeb ntawm kev kho cua sov ntawm steel castings.
Cov txheej txheem tseem ceeb ntawm kev kho cua sov ntawm steel castings:
1. Qhov kub ntawm cov hlau castings muaj peb theem: cua sov, rwb thaiv tsev thiab cua txias. Kev txiav txim siab ntawm cov txheej txheem tsis yog raws li kev ua kom cov khoom zoo thiab txuag nqi.
2. Cov txheej txheem kev kho cua sov ntawm steel castings txawv raws li cov cua sov thiab cua txias. Lub ntsiab kev kho cua sov ntawm steel castings yog: annealing normalizing, homogenization kev kho mob, quenching, tempering, khoom tov kho, nag lossis daus hardening, kev kho mob kev nyuaj siab thiab dehydrogenation kev kho mob.
3. Annealing yog txheej txheem kev kho cua sov ntawm cov cua sov steel castings mus rau qhov kub thiab txias, tuav rau qee lub sijhawm thiab txias. Lub hom phiaj ntawm annealing yog tshem tawm columnar siv lead ua, coarse equiaxed siv lead ua, widmanstatten qauv thiab dendritic cais nyob rau hauv lub casting qauv, thiaj li mus txhim kho lub mechanical zog ntawm cam khwb cia hlau.
4. Microstructure ntawm carbon steel tom qab annealing: hypoeutectoid cam khwb cia hlau yog ferrite thiab pearlite, eutectoid cam khwb cia hlau yog pearlite, thiab hypereutectoid cam khwb cia hlau yog pearlite thiab carbide. Nws muaj feem xyuam rau txhua qib ntawm steel castings.
