Cov laj thawj tseem ceeb rau kev xav tau ferrosilicon hauv steelmaking yog raws li hauv qab no:
1. Alloying Elements
Raws li cov khoom siv hlau uas muaj silicon thiab hlau, ntxiv ferrosilicon qhia cov ntsiab lus alloying rau hauv cov hlau molten. Silicon ua hauj lwm zoo li deoxidizer, reacting nrog oxygen los tsim silicon dioxide thiab yog li tshem tawm oxygen los ntawm cov hlau molten. Qhov no txo cov ntsiab lus oxygen thiab txo cov qib ntawm cov hlau oxidation. Tsis tas li ntawd, silicon txhim khu lub fluidity thiab wettability ntawm molten steel, yooj yim rau nws pouring thiab solidification txheej txheem.
2. Tshem tawm cov oxides
Thaum lub sij hawm steelmaking, molten steel generates loj npaum li cas ntawm oxides. Ferro-silicon ua haujlwm ua tus neeg sawv cev kom tshem tawm cov oxides. Oxides cuam tshuam steel zoo los ntawm inducing brittleness thiab txo cov neeg kho tshuab lub zog. Ferro-silicon kuj reacts nrog oxides los ua silicates, uas tuaj yeem lim tau yooj yim.
3. Txhim kho hlau zoo
Ferrosilicon muaj cov silicon siab thiab cov pa roj carbon tsawg, uas txhim kho cov hlau zoo thaum tsim khoom. Raws li cov khoom siv alloying, nws boosts mechanical zog, hnav tsis kam, corrosion kuj, thiab qaug zog kuj. Qhov no yog qhov tshwj xeeb tshaj yog rau kev tsim khoom txias-rolled steel, hluav taws xob motors, thiab transformers.
4. Kho cov hlau sib xyaw
Ferrosilicon ua haujlwm raws li kev hloov kho steel los tswj kev muaj pes tsawg leeg. Nws nce silicon cov ntsiab lus thaum txo cov qib carbon hauv cov hlau. Qhov kev hloov kho no yog qhov tseem ceeb rau kev ua kom tau raws li cov qib steel tshwj xeeb thiab cov ntawv thov.
5.提高钢的硬度和耐腐蚀性能
硅铁能够增加钢中的硅含量和铁含量,这能够提高钢的硬度和耐腐蚀性能.同时,硅铁还能够降低钢中的碳含量,使钢的强度变高,从而增强了钢的机械性能.
6.改善钢的铸造性能
硅铁可以使钢液的流动性更好,降低钢液的表面张力,从而改善了钢的铸造性能.此外,硅铁还能够提高钢液的温度,有利于钢的连铸.
7.促进钢的晶粒细化
硅铁中的硅能够在钢液中形成固相颗粒,这些颗粒可以在晶界上起到化学弥散的作用,促进晶粒的形成,从而提高钢的机械性能.
