Siliconplays lub luag haujlwm tseem ceeb hauv cam khwb cia hlau, feem ntau los ntawm kev txhawb nqa graphitisation los txhim kho cov khoom siv kho tshuab. Nws lub luag haujlwm sib txawv ntawm ob hom cam khwb cia hlau: cov hlau cam khwb cia hlau thiab grey cam khwb cia hlau. Nov yog li cassilicon hlauyog siv rau hauv cov ntawv thov no:
2.1 Ductile cam khwb cia hlau
Nyob rau hauv cov hlau cam khwb cia hlau, silicon hlau tsis tsuas yog ua raws li tus neeg sawv cev deoxidising tab sis kuj ua raws li cov khoom siv graphitising. Nws txhawb kev hloov pauv ntawm cov pa roj carbon monoxide los ntawm carburite (Fe₃C) daim ntawv rau spheroidal graphite, uas txhim kho cov khoom siv ntawm cov hlau cam khwb cia, xws li toughness thiab ductility. Spheroidal graphite yog muab faib rau hauv cov cam khwb cia hlau nyob rau hauv daim ntawv ntawm zoo kheej kheej duab, uas muab cov cam khwb cia hlau tsis tsuas yog siab zog thiab hardness, tab sis kuj khaws ib tug tej yam degree ntawm ductility. Hom spheroidal graphite cam khwb cia hlau muaj cov ntsiab lus silicon ntawm 2.2% thiab 2.8%
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Txhawb nqa spheroidal graphite tsim: Silicon hlaupab cov pa roj carbon monoxide los ua spheroidal graphite es tsis yog carburite, thiab cov qauv spheroidal no zoo txo cov kev ntxhov siab thiab txhim kho cov cam khwb cia hlau qhov cuam tshuam.
Txhim kho toughness thiab ductility: Qhov sib ntxiv ntawm cov hlau silicon ua rau cov hlau ductile muaj qhov zoo dua toughness thiab ductility thaum tuav lub zog siab, uas yog tsim rau cov khoom siv nrog lub zog siab.
2.2 Grey cam khwb cia hlau
Lub luag haujlwm tseem ceeb ntawmsilicon hlaunyob rau hauv grey cam khwb cia hlau yog los txhawb graphitization, yog li ntawd carbon yog precipitated nyob rau hauv daim ntawv ntawm flake graphite, uas txhim kho cov neeg kho tshuab zog ntawm cam khwb cia hlau. Flake graphite yog muab faib rau hauv cov matrix, tsim ib tug grey cam khwb cia hlau nrog zoo lubrication thiab vibration damping zog. Grey cam khwb cia hlau feem ntau yog siv rau hauv kev tsim cov cav cav, li qub thiab twj thiab lwm yam khoom siv. Cov ntsiab lus ntawm silicon hlau ntawm grey cam khwb cia hlau feem ntau yog li ntawm 1.5% mus rau 3.5%.
Txhawb nqa flake graphite nag lossis daus: Silicon hlautxhawb cov nag lossis daus ntawm carbon nyob rau hauv daim ntawv ntawm flake graphite, uas muab cov cam khwb cia hlau zoo lubrication, uas yog ib qho tseem ceeb rau txo hnav thiab prolonging lub neej ntawm qhov chaw.
Txhim kho kev co damping: Cov qauv flake graphite muab grey cam khwb cia hlau zoo vibration damping zog, ua rau nws haum rau siv nyob rau hauv qhov chaw uas yuav tsum tau nqus kev co thiab poob siab.
Cov ntsiab lus
Silicon hlauyog ib qho tseem ceeb hauv cam khwb cia hlau thiab txhim kho cov khoom ntawm ob qho tib si ductile thiab grey cam khwb cia hlau los ntawm kev txhawb nqa graphitisation. Cov ntsiab lus ntawm silicon hlau nyob rau hauv ductile cam khwb cia hlau ua rau cov pa roj carbon los precipitate li spheroidal graphite, uas txhim kho lub zog, toughness thiab ductility ntawm cov cam khwb cia hlau, thaum lub silicon cov ntsiab lus nyob rau hauv grey cam khwb cia hlau txhawb carbon kom precipitate li flake graphite, uas txhim khu lub lubrication thiab vibration damping zog ntawm cam khwb cia hlau. Cov luag haujlwm no ua rau silicon indispensable nyob rau hauv kev tsim cov cam khwb cia hlau, dav siv nyob rau hauv zus tau tej cov ntau yam mechanical qhov chaw.
