1. Tshuaj lom neeg sib xyaw
Cov ntsiab lus carbon: txhua 0.1% nce rau hauv cov ntsiab lus carbon cov ntsiab lus tsa cov ducter {}} brrely transitle hloov kub los ntawm kwv yees li 10 degree. Qhov zoo tshaj plaws yog 0.25% -0.45%.
Alloy cov ntsiab lus: txhua 0.1% nce hauv manganese (mn) cov ntsiab lus qis qis dua lub zas kom qis dua li ntawm 2-3 degree; Ntxiv 0.15% -0.25% molybdenum (mo) hloov kho cov noob loj.
Kabmob tswj: Sulfur (s) yuav tsum tsawg dua lossis sib npaug rau 0.02% thiab zoo rau 0.015% kom tsis txhob muaj cov qoob loo sib txig sib luag.
2. Kev Tsim Kho Cov Txheej Txheem
Kub Rolling / Txias Rolling: Txias {{k}}} {1} {1} zoo dua rau kub- rolled leeg.
Kev Kho Cua Sov: Siv kev kho cua sov tuaj yeem tshem tawm cov qauv sib dhos, thiab thermomechanical tswj (TMCP) rov qab cov mov loj rau Astm Qib 10 lossis siab dua.
Welding txheej: Tsawg {- hydrogen} hydrogen welding -}} cuam tshuam cheeb tsam.
3. Ib puag ncig thiab thauj khoom
Qhov kub thiab txias: hauv qab no hauv dai - bech brittle hloov ntawm Q345 cov hlau yuav txo los ntawm 50%.
Lub xeev kev ntxhov siab: Cov paib tuab (dav hlau sib zog) muaj kev ntxhov siab ntau dua li cov paib hlau (dav hlau v {} Cov kev cuam tshuam ntawm noch tsis tshua muaj kev ntsuas.
Corrosive Media: Kev ntxhov siab corrosion tawg tawm kev hais tawm sai dua ntawm cov kub kub; Corrosion -} Cov ntaub ntawv resistant (xws li 316L) yuav tsum tau xaiv.
4. Microstructure
Non-metallic inclusions: When the level of type D inclusions is >2, txoj kev pheej hmoo ntawm kev tawg nce ntau heev.
Banded qauv: ntau dua lossis sib luag rau cov qauv qib 4 lossis Widmanstt -Tten tsim muaj ntau dua lossis sib npaug rau cov kev txhawb nqa ntawm qib 3.
