Calcium silicon alloyyog ib qho tseem ceeb alloy cov khoom siv, feem ntau muaj ntawm silicon thiab calcium, feem ntau nrog cov ntsiab lus silicon ntawm 30% thiab 60%.
Kev lag luam steelmaking: Cov deoxidation, desulfurization, thiab kev ua tau zoo
Silicon calcium alloy yog cov khoom siv ua haujlwm zoo hauv cov khoom siv statmaking, muaj ntau lub zog suav nrog deoxidation, desulfurization, thiab receelsement:
Deagidation Function:
Raws li pre - deoxidizer lossis deoxidizer zaum kawg, ntxiv rau 0.3%} 0.8% ntawm cov steel loj. Calcium (Ca) muaj qhov muaj zog heev rau oxygen (tshuaj tiv thaiv dawb zog Δ / mol), nyiam ua ke nrog oxygen nyob rau hauv cov hlau los ua cao. Silicon (Si) ib txhij cov ntaub sio₂, thiab ob daim ntawv tsawg {}} me ntsis- me ntsis ntau dua li ntawd ntawm cov hlau (2.6g / cm³) .8g / cm³). Qhov no suav nrog sai floats mus rau saum npoo thiab raug tshem tawm nrog cov nplais, txo cov ntsiab lus oxygen ntawm cov hlau los ntawm 80-50ppm mus rau qhov tsis xws luag xws li porosity thiab suav nrog.
Desulfurization:
Calcium reacts nrog cov leej faj los tsim ua haujlwm ruaj khov (melting point 2450}}}}}} {} mus rau 0.009% -0.012%. Qhov no txhim kho cov hlau kub tawg thiab ua kev ua tau zoo, ua kom haum rau cov hlau zoo (xws li cov hlau thiab lub caij nplooj ntoo hlau).
Lis cov kws ua kom zoo thiab ua tiav txhim kho:
Cov tshuaj calcium txhawb nqa kev tsim ntawm carbonitrides xws li NB thiab ti thiab Ti hauv hlau, ua kom qoob loo loj (los ntawm 50-30μm). Qhov no nce lub tensile lub zog ntawm cov hlau los ntawm 15% -20% thiab qhov cuam tshuam nyuaj los ntawm 25%, thaum tseem tab tom txhim kho cov hlau weldability thiab corrosion tsis kam.
Foundry Kev Lag Luam: Inoculants thiab Casting Zoo Ua Kom Zoo
Nyob rau hauv cov hlau cam khwb cia thiab tsis {{0} ferrous alloy Casting, Casi alloy yog qhov tseem ceeb inoculant thiab kev ua tau zoo hloov kho:
Cam khwb cia hlau inoculation:
Ntxiv 0.2% -0.5% ntawm cov hlau loj, silicon txhawb nqa cov txheej txheem ntawm cov duab ntsej muag los ntawm cov duab plaub fab tawg, tiv thaiv kev tsim cov hlau dawb. Qhov no tuaj yeem ua rau cov kev cuam tshuam nyuaj ntawm Grey cam khwb cia hlau los ntawm 20%, ua rau nws haum cov khoom pov tseg xws li lub cav cav thiab tshuab cov cuab yeej txaj.
Tsis - ferrous alloy casting:
Ntxiv 0.1%- 0.3% silicon- calcium alloy nyob rau hauv Aluminoy ntau lawm tso cai rau newsning kub kev tawg, thaum silicon txhim kho alloy zog. Hauv cov hlau nplaum sib xyaw ua ke, nws tuaj yeem kho cov qoob loo loj (los ntawm 10050
Casting tsis zoo:
Los ntawm purifying hlau thiab txhim kho cov xim tsis zoo, qhov tsis taus muaj qhov tsis taus, nce ntxiv cov nqi los ntawm 10% thiab txo cov nqi tom ntej.
Tshwj xeeb alloks thiab cov ntaub ntawv tshiab: kev hloov kho tau thiab ua tau zoo dua
Tshwj Xeeb Hlau Ntau Lawm:
Adding SiCa alloys to stainless steel smelting optimizes chromium distribution, avoids chromium-depleted zones, and extends salt spray corrosion resistance from 200 hours to over 350 hours. Hauv tshav kub - tiv taus alloy ntau lawm, ua rau cov kab yees duab tuab ntawm 1000℃{}} kub cov khoom kub.
Cov Khoom Siv Hluav Taws Xob:
High - Purity Sawb Silicon Calcium alloys tsawg dua los yog sib npaug rau cov khoom siv raw rau cov khoom siv semiconductor npaj. Polycrystalline silicon yog tsim los ntawm kev tiv thaiv kev txo qis, nrog rau kev cuam tshuam hluav taws xob ntawm cov khoom siv hluav taws xob ntawm silicon wafers, ua rau nws haum rau chip manufacturing scenarios.
Hauv cov ntaub ntawv refractory teb:
Calcium silicon alloy hmoov tuaj yeem siv los ua kev sib ntxiv hauv cov ntaub ntawv sib txawv thiab kev ua haujlwm siab (txhim kho corrosion}
Lwm yam kev lag luam: Kev tiv thaiv ib puag ncig thiab cov ntaub ntawv ua haujlwm
Tshuaj Kev Lag Luam:
Raws li tus neeg sawv cev lossis cov catalyst, nws yog siv rau hauv cov khoom siv tawm tswv yim (xws li kev npaj cov khoom siv) kom ua kom nrawm txheej txheem cov tshuaj tiv thaiv; Nws tseem tuaj yeem tsim lub inoculants tsim nyog, haum rau qhov xav tau kev xav tau ntawm corrosion {} {reawant thiab hnav cov khoom siv tshuaj lom neeg.
Ib puag ncig zoo:
Siv Silicon Calcium alloys los hloov ib lub desoxidizers (xws li txhuas) muaj kev siv zog ua ntej ntawm 5%, sib dhos nrog cov qauv ntawm ntsuab metallurgy; Ntxiv mus, tus nqi ntawm casi alloys tsuas yog 1 / 3-1 / 2 ntawm qhov ntawd, ntsuas kev khwv nyiaj txiag ua haujlwm thiab ib puag ncig ua phooj ywg.
Cov ntawv thov tseem ceeb thiab xaiv cov hauv paus ntsiab lus
Daim Ntawv Thov:
Kev ua haujlwm puas haum (deoxidation + desulfurization + inoculation + alloying), tshem tawm qhov kev xav tau rau ntau yam ntxiv; Kev siv dav (steelmaking dav (steelmaking, casting, khoom siv hluav taws xob, thiab lwm yam teb); Siab tus nqi - ua tau zoo, ntsuas kev ua tau zoo thiab kev lag luam.
Xaiv cov ntsiab cai:
Rau steelmaking deoxidation thiab desulfurization, xaiv siab - calcium qib (piv txwv li, CA3SI55); Rau casting inoculation, xaiv siab - cov qib qib (piv txwv li CA28SI60); Rau cov ntaub ntawv hluav taws xob, xaiv siab- Cov qhab nia tsawg (tag nrho cov impurities tsawg dua los yog sib npaug rau 0.1%); Kho qhov ntxiv ntxiv raws li cov hom khoom thiab cov cuab yeej siv kom tsis txhob ua rau kev sib ntxiv ntawm kev tsim cov tawv thiab tawv.
