Ntau tshaj 1.5 billion tons ntawm hlau yog tsim txhua xyoo, uas yog siv los ua ntau yam khoom, xws li xaws koob thiab cov qauv kab teeb rau skyscrapers.Cov pa roj carbon steel yog feem ntau siv alloy steel, suav txog li 85% ntawm tag nrho cov khoom hauv Teb Chaws Asmeskas.Cov ntsiab lus carbon ntawm cov khoom yog nyob rau hauv 0-2%.Cov pa roj carbon no cuam tshuam rau microstructure ntawm hlau, muab nws cov lus dab neeg lub zog thiab toughness.Cov alloys no kuj muaj me me ntawm manganese, silicon thiab tooj liab.Cov hlau me me yog cov lus lag luam rau cov hlau me me nrog cov ntsiab lus carbon hauv thaj tsam ntawm 0.04-0.3%.
Cov pa roj carbon steel tuaj yeem raug cais raws li cov tshuaj muaj pes tsawg leeg thiab cov khoom ntawm cov khoom.Cov hlau me me kuj poob rau hauv cov hlau me me vim tias nws muaj cov ntsiab lus carbon zoo sib xws.Ordinary carbon steel tsis muaj alloys thiab tuaj yeem muab faib ua plaub pawg:
1. Tsawg carbon steel
Cov hlau me me muaj cov ntsiab lus carbon ntawm 0.04-0.3% thiab yog qib siab tshaj plaws ntawm cov hlau.Cov hlau me kuj tseem suav tias yog cov hlau me me raws li nws txhais tau tias muaj cov ntsiab lus carbon tsawg ntawm 0.05-0.25%.Cov hlau me me yog ductile, zoo heev malleable thiab tuaj yeem siv rau hauv tsheb lub cev, daim ntawv thiab cov khoom siv hlau.Ntawm qhov kawg ntawm cov ntsiab lus qis carbon tsawg, ntxiv txog li 1.5% manganese, cov khoom siv kho tshuab tsim nyog rau stampings, forgings, seamless hlab thiab boiler daim hlau.
2. Cov pa roj carbon steel nruab nrab
Cov pa roj carbon nruab nrab muaj cov ntsiab lus carbon hauv thaj tsam ntawm 0.31-0.6% thiab cov ntsiab lus manganese nyob rau hauv thaj tsam ntawm 0.6-1.65%.Cov hlau no tuaj yeem raug kho kom sov thiab quenched kom txuas ntxiv kho qhov microstructure thiab mechanical zog.Cov ntawv thov nrov muaj xws li axles, axles, gears, rails thiab railroad wheels.
3. High carbon steel
High carbon steel muaj cov ntsiab lus carbon ntawm 0.6-1% thiab manganese cov ntsiab lus ntawm 0.3-0.9%.Cov khoom ntawm high carbon steel ua rau nws haum rau siv raws li springs thiab siab zog hlau.Cov khoom no tsis tuaj yeem welded tshwj tsis yog tias muaj cov txheej txheem kev kho cua sov kom ntxaws nrog rau cov txheej txheem vuam.High carbon steel yog siv rau kev txiav cov cuab yeej, siab zog hlau thiab springs.
4. Ultra-siab carbon steel
Ultra-high carbon steels muaj cov ntsiab lus carbon ntawm 1.25-2% thiab paub tias yog kev sim alloys.Tempering tsim cov hlau tawv heev, uas yog qhov tseem ceeb rau kev siv xws li riam, axles lossis xuas nrig ntaus.
Post lub sij hawm: Lub Xya hli ntuj-31-2022