Si yog ib qho tseem ceeb txo tus neeg sawv cev thiab deoxidizer hauv cov txheej txheem steelmaking: ntau cov ntaub ntawv hauv carbon steel muaj tsawg dua 0.5% Si. Qhov Si no feem ntau coj los ua tus neeg sawv cev txo qis thiab deoxidizer thaum lub sijhawm ua cov txheej txheem steel. ntawm.
Silicon tuaj yeem yaj hauv ferrite thiab austenite los txhim kho qhov nyuaj thiab lub zog ntawm cov hlau. Nws cov nyhuv yog qhov thib ob rau phosphorus thiab muaj zog dua li cov ntsiab lus xws li manganese, nickel, chromium, tungsten, molybdenum, thiab vanadium. Txawm li cas los xij, thaum cov ntsiab lus silicon ntau dua 3%, cov yas thiab tawv ntawm cov hlau yuav raug txo kom tsawg. Silicon tuaj yeem txhim kho qhov kev txwv elastic, lub zog tawm los thiab qhov sib piv (σs / σb) ntawm cov hlau, nrog rau kev qaug zog thiab qaug zog piv (σ-1 / σb), thiab lwm yam. Qhov no yog vim li cas silicon lossis silicon- manganese steel tuaj yeem siv ua lub caij nplooj ntoos hlav steel.
Silicon tuaj yeem txo qhov ntom ntom, thermal conductivity thiab hluav taws xob conductivity ntawm hlau. Nws tuaj yeem txhawb cov coarsening ntawm ferrite nplej thiab txo cov quab yuam. Nws muaj lub siab nyiam txo cov anisotropy ntawm cov siv lead ua, ua kom cov hlau nplaum yooj yim dua thiab txo cov hlau nplaum tiv thaiv. Nws tuaj yeem siv los tsim hluav taws xob hlau, yog li qhov sib nqus hysteresis poob ntawm silicon steel los xij yog tsawg. Silicon tuaj yeem nce qhov sib nqus permeability ntawm ferrite, ua rau cov ntawv hlau muaj zog sib nqus induction ntau dua hauv cov hlau nplaum tsis muaj zog. Txawm li cas los xij, silicon txo qhov sib nqus induction ntawm cov hlau nyob rau hauv cov hlau nplaum muaj zog. Silicon muaj zog deoxidizing zog, yog li txo qhov kev laus ntawm cov hlau nplaum.
Thaum cov hlau uas muaj silicon yog rhuab nyob rau hauv ib qho chaw oxidizing, ib txheej ntawm SiO2 zaj duab xis yuav raug tsim nyob rau saum npoo, yog li txhim kho cov oxidation tsis kam ntawm cov hlau ntawm qhov kub thiab txias.
Silicon tuaj yeem txhawb kev loj hlob ntawm columnar crystals hauv cam khwb cia hlau thiab txo cov yas. Yog tias silicon steel txias sai sai thaum rhuab, vim tsis muaj thermal conductivity, qhov kub ntawm qhov sib txawv ntawm sab hauv thiab sab nraud ntawm cov hlau yuav loj, ua rau nws tawg.
Silicon tuaj yeem txo qhov weldability ntawm steel. Vim tias silicon muaj peev xwm ua ke nrog cov pa oxygen ntau dua li cov hlau, nws yog ib qho yooj yim los tsim cov ntsiab lus qis-melting-silicates thaum lub sij hawm vuam, uas ua rau kom cov fluidity ntawm slag thiab molten hlau, ua rau splashing thiab cuam tshuam rau vuam zoo. Silicon yog ib qho zoo deoxidizer. Thaum deoxidizing aluminium, ntxiv qee qhov nyiaj ntawm silicon raws li qhov tsim nyog tuaj yeem txhim kho cov khoom deoxidizing ntawm txhuas. Muaj qee qhov nyiaj ntawm silicon tshuav nyob rau hauv steel, uas yog coj los ua raw khoom thaum lub sij hawm hlau thiab hlau ua. Hauv boiling steel, silicon yog txwv rau<0.07%, and when added intentionally, ferrosilicon alloys are added during steelmaking.