Cov yeeb nkab steel yog ib qho tseem ceeb khoom siv, siv dav siv hauv kev tsim kho, tshuab, petrochemicals, tsheb tsim khoom, thiab lwm daim teb. Nws qhov kev ua tau zoo nyob tsis yog tsuas yog ntawm nws cov kev siv tshuab tab sis kuj ntawm nws cov tshuaj lom neeg ua ke. Cov yeeb nkab steel yog feem ntau tsim ntawm cov hlau (FE), tab sis cov pa roj carbon monoxent xws li ua kom tiav cov khoom siv hluav taws xob (xov tooj)
Cov Txheej Txheem Yooj Yim: Hlau thiab Carbon
Hlau yog thawj feem ntawm cov yeeb nkab steel, txiav txim siab nws cov kev yooj yim me me ntawm cov khoom siv. Cov pa roj carbon yog qhov tseem ceeb cuam tshuam rau nws lub zog thiab hardness, nrog nws cov ntsiab lus feem ntau xws li 0.02% rau 2.11%. Tsawg -} cov ntsiab lus hlau (cov ntsiab lus carbon<0.25%) offers excellent ductility and weldability and is suitable for structural steel pipes. Medium-carbon steel (carbon content 0.25%-0.6%) offers higher strength and is commonly used in mechanical parts. High-carbon steel (carbon content >0.6%) Cov khoom ua pov thawj ua kom muaj zog ntxiv tab sis txo qis dua thiab yog qhov tsim nyog rau cov cuab yeej lossis txiav cov cuab yeej.
Lub luag haujlwm ntawm cov ntsiab lus alloy
Manganese (MN) yog ib qho kev sib dhos ua ke hauv cov kav dej steel, feem ntau tuaj yeem nyob rau hauv ntau ntawm 0.25% thiab 1.6%. Nws txhim kho cov hlau lub zog thiab hnav tsis kam, thaum tseem ne tsis muaj kev phom sij ntawm cov leej faj thiab txhim kho cov khoom siv kub kub.
Silicon (Si) feem ntau ntxiv ua deoxidizer, ntawm ntau qhov ntawm 0.15% thiab 0.5%. Nws nce cov hlau lub zog thiab qhov txwv ywj, tab sis ntau dhau ntawm cov neeg tuaj yeem txo qis.
Sulphurur (s) thiab phosphorus (p) yog cov phom sij hauv cov hlau. Sulphur tuaj yeem ua rau kub brittleness kub, thaum phosphorus tuaj yeem ua rau txias brittleness txias. Yog li ntawd, siab - Cov kav dej zoo steel kav feem ntau muaj cov khoom siv tsawg no (<0.05% sulfur and <0.045% phosphorus).
Cov ntsiab lus tseem ceeb hauv Almoy Hlau Kave
Ntxiv rau cov pa roj carbon hlau, ntau cov kav hlau muaj cov ntsiab lus los txhim kho cov khoom tshwj xeeb:
Chromium (CR) txhim kho corrosion tsis kam thiab siab - kev tivthaiv kub (xws li 304 thiab 316 kav dej stainless (xws li 304 thiab 316 kav dej stainless (xws li 304 thiab 316 kav dej stainless (xws li 304 thiab 316 kav dej stainless (xws li 304 thiab 316 kav dej stainless (xws li 304 thiab 316 kav hlau (xws li 304 Nickel (NI) txhim kho kev nruj thiab corrosion tsis kam thiab siv feem ntau siv nyob rau hauv qis {4} cov kav hlau kub lossis stainless hlau. Molybdenum (mo) txhim kho siab high- kub lub zog thiab corrosion lub zog thiab corrosion tsis kam thiab haum rau cov kav hlau siv hauv kev lag luam petrochemical.
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Cov kav hlau steel yog feem ntau tsim ntawm cov hlau thiab carbon, ntxiv los ntawm cov khoom siv xws li manganese thiab silicon. Los ntawm kev kho cov sib piv ntawm cov khoom siv, lub zog, tawv, thiab corrosion tsis zoo ntawm cov yeeb nkab steel tuaj yeem ua kom tau raws li cov kev xav tau ntawm cov kev siv sib txawv. To taub lub luag haujlwm ntawm cov khoom siv no tuaj yeem pab koj xaiv cov yeeb nkab ntawm cov yeeb nkab hlau thiab ua kom muaj kev nyab xeeb thiab tus nqi} ua hauj lwm zoo ntawm koj cov ntawv thov engineering.