Ferrosilicon - yog qhov tseem ceeb ferrroalloy cov ntaub ntawv hauv ntau qhov kev lag luam, cov khoom siv hlau thiab tsis muaj hlau tsim hlau.
1. Kev lag luam hlau
(1) deoxidizer
Mechanism ntawm Kev Ua:
Silicon ua ke nrog oxygen (O₂) hauv cov av me me los ua kom muaj silicon dioxide (sitio), uas yog kev tiv thaiv tsis xws li xws li pores thiab suav nrog.
Qhov Zoo:
Lub deoxidation efficiency yog siab dua li ntawm txhuas, tus nqi yog qis dua, thiab yog siv dav hauv kev tsim cov qauv semi-quenched thiab tag nrho cov hlau npau npau.
Cov khoom siv uas siv: Kwv yees li3-5 kgFerrosilicon noj ib tev ntawm cov hlau (kho tau nyob ntawm hom hlau).
(2) additive rau alloying ntsiab
Lub hom phiaj:
Txhim kho lub zog, hardness thiab corrosion tsis kam ntawm cov hlau (piv txwv li cov hlau silicon, lub caij nplooj ntoo hlau, hlau stainless).
Txhim kho cov khoom siv hluav taws xob hluav taws xob ntawm cov hlau (piv txwv li cov hlau hluav taws xob nrog cov ntsiab lus silicon los ntawm3 txog 5%).
Cov Hom Hlau:
Silicon Hlau (Hlau Hlau): Siv hauv kev hloov pauv thiab cov cores muaj zog, silicon cov ntsiab lus nws txawv los ntawm2 txog 5%Cov.
Lub caij nplooj ntoo hlau (piv txwv li 60si2mn): Silicon txhim kho elasticity thiab qaug zog muaj zog.
(3) cov ntsiab lus silicon additive
Siv los tswj qhov kawg li silicon cov ntsiab lus ntawm Molten Steel kom ntseeg tau tias cov tshuaj lom neeg raws li cov qauv.
2. Nrhiav Kev Lag Luam Kev Lag Luam
(1) inoculant
Ua Haujlwm:
Ntxiv ua ntej nchuav cov hlau nplaum (xws li hlau nrum hlau thiab cov hlau nplaum) los txhawb cov kab thaiv cov duab nag lossis daus.
Nws txhim kho cov khoom siv tshuab (xws li lub zog tensile thiab ductility) ntawm cov hlau cam khwb cia.
Ntse:Feem ntaulos ntawm 0.2 mus rau 0.8%los ntawm qhov hnyav ntawm molten cam khwb cia hlau.
(2) Zas Cov Hlau Ntau Lawm
Ferrosilicon yog siv hauv kev sib xyaw nrog magnesium (mg) kom ruaj khov cov tshuaj tiv thaiv thiab muab cov qauv sib xws rau cov graphite.
NTAUAU LI QIB: Ferrosilicon nrog cov ntsiab lus tsawg (piv txwv li, fesi75-ib tsawg dua lossis sib npaug rau 0.5%) yog qhov tsim nyog kom tsis txhob cuam tshuam nrog cov nyhuv sib cav.
3. Cov txheej txheem hlau nplaum (Pidgeon txheej txheem)
Lub luag haujlwm ntawm tus neeg sawv cev:
Nyob rau hauv lub tshuab cua sov siab rauv rauv, ferrosilicon (feem ntauFesi75) reacts nrog calcined dolomite (Mgo - cau) kom txo cov hlau magnesium:
2mo + si → 2mg ↑ + SIO2
Yuav tsum muaj rau ferrosilicon: Cov ntsiab lus silicon siab (ntau dua lossis sib npaug nrog 75%), tsawg dua lossis sib npaug nrog 1%) txhawm rau txhim kho kev ua tau zoo.
Kev lag luam efficiency: Txhua tuj ntawm magnesium hlau tsim nyog yuav tsum tau noj ntawm kwv yees li1.1-1.2 Tons ntawm ferrosilicon, tus nqi twg rau30-40% ntawmTus nqi ntawm magnesium ntau lawm.
4. Kev tsim tawm ntawm lwm ferroalloys
Raw Khoom Siv Raw: Ferrosilicon yog siv los ua ib qho nruab nrab alloy rau kev tsim cov calcium {} {{} {{{{{{} mn), thiab lwm yam mn), thiab lwm yam mn.
Piv txwv
Calcium -} legicon alloy: Tsim los ntawm rerrosilicon thiab txiv qaub nyob rau hauv ib qho hluav taws xob rauv, siv rau cov hlau sib sib zog nqus thiab desulfurization ntawm Molten hlau.
5. Zus Tau Tej Cov Vuam Rods
lub hom phiaj:
Raws li txheej txheej sib xyaw ntawm cov lag luam vuam, nws txhim kho cov dej ntawm Weld pas thiab ua kom cov oxidation tsis kam thiab lub zog ntawm cov hlau weld.
Hom Xaiv: Fesi45lossisFesi65Feem ntau siv, nrog me me qhov loj me (0.1 ib hlis).