HSLA (High Strength Low Alloy) steel feem ntau yog cais raws li cov pa roj carbon steel, tsuas yog ib qho me me ntawm cov khoom sib txuas ntxiv los ua kom lub zog ntawm cov hlau. Qhov sib txawv ntawm cov pa roj carbon ntshiab thiab cov hlau tsis tshua muaj hlau yog qhov tsis tshua muaj hlau ua rau cov hlau muaj zog dua thiab kev kho cua sov ntau dua, thiab muaj kev tiv thaiv corrosion zoo dua.
High Strength Low Alloy Steel Phaj Manufacturing Txheej txheem:
Cov khoom siv raw (hlau ore thiab thee) raug xa mus rau qhov cub kom smelted, tom qab cov ntsiab lus tsis huv raug tshem tawm, ntxiv cov ntsiab lus alloy ntawm qee qhov ntau raws li cov lus qhia ntawm qib steel. Tom qab ntawd ua cov kauj ruam los txo cov khoom tsis xav tau xws li S, P kom xav tau feem pua, thaum kawg tsim cov hlau cam khwb cia rau hauv cov duab plaub. Tom qab ntawd koj tuaj yeem ua lwm txoj hauv kev lossis mus rau lwm yam kev kho mob.
Alloying element thiab mechanical zog ntawm steel
Tungsten, vanadium, silicon, npib tsib xee, molybdenum, thiab manganese tau pom tias ua kom muaj zog thiab hardness ntawm carbon hlau. Nickel yog ntxiv rau lub hom phiaj ntawm kev ua kom tawv nqaij.
tooj liab, npib tsib xee thiab chromium muaj peev xwm ua kom muaj kev tiv thaiv corrosion ntawm hlau. Rau cov ntsiab lus no muaj zog ntau dua rau xeb dua hlau, yog li cov hlau tiv thaiv los ntawm xeb.
HSLA Steel Phaj Qib
Muaj ntau ntau qib sib txawv ntawm HSLA steel muaj vim muaj ntau yam kev sib xyaw ua ke uas tuaj yeem siv tau. Cov tshuaj lom neeg muaj pes tsawg leeg thiab qib yuav tsum nyob ntawm qhov kev thov ntawm HSLA steel. Vim muaj cov zaub mov txawv ntawm cov ntsiab lus alloying ntxiv, HSLA Steels tau tsim rau ntau qib steel rau ntau yam kev siv. Muaj qee cov qib steel uas paub zoo: ASTM A36, ASTM A242 thiab ASTM A588, ASTM A573, thiab lwm yam.
ASTM A36: Feem ntau cov qauv steel qib, muaj lub zog zoo thiab yog weldable, machinable, thiab pheej yig dua lwm cov hlau alloy. ASTM A36 yog ib qho ntawm cov qib steel nrov tshaj plaws siv hauv kev tsim vaj tsev txog tam sim no.
Huab cua Resistant Steel (ASTM A242 / ASTM A588): Uas yog tsim los rau sab nrauv steel qauv raug rau cov cua. Nws tsim cov txheej txheem tiv thaiv oxidized, uas tuaj yeem siv tau ntau xyoo, nws tsis xav tau cov xim tshwj xeeb kom tiv taus corrosion. Huab cua resistant steel yog nrov rau tsis muaj kev saib xyuas ua haujlwm.
Hlau Phaj / Piping Pressure Vessel: API 5L Qib X70 yog ib qho ntawm cov khoom siv feem ntau siv rau cov roj thiab cov kav dej. Lwm cov hlau siv hauv kev lag luam roj thiab roj yog ASTM A573. ASTM A573 feem ntau yog siv rau kev tsim cov roj thiab roj cia tank.
