摘要
通过热模拟和热处理试验研究了欧标S355J2微合金结构钢奥氏体晶粒的长大规律。热模拟焊接的试验结果表明,当峰值加热温度低于1250℃时,S355J2钢焊接热影响区(HAZ)奥氏体晶粒较细小,并随着保温时间的延长而不断长大;当峰值加热温度高于1250℃时,奥氏体晶粒急剧长大,长大幅度随着保温时间的延长而减小。热处理试验结果为,在低于1050℃加热时,S355J2钢奥氏体晶粒较细小,并且随着保温时间的延长奥氏体晶粒长大不明显;当加热温度高于1200℃时,奥氏体晶粒急剧长大,并且随着保温时间的延长长大幅度较大。
Austenite grain growth behavior in European standard S355J2 microalloy structural steel was investigated through thermal simulation and heat treatment tests. The thermal simulating results of welding show that when heated at leak temperatures below 1250 ℃, the austenite grain in HAZ of S355J2 steel will be fine, and progressively grow with the prolongation of time at the temperature, and that when heated at peak temperatures above 1250 ℃, the austenite grain will severely grow, and growth amplitude progressively decreases with the prolongation of time at the temperature. The heat treatment results lie in that when heated at temperatures below 1050 ℃, the austenite grain in S355J2 steel will be fine, and will not appreciably grow with the prolongation of time at the temperature, and that when heated at temperatures above 1200℃, the austenite grain will severely grow Key , and will appreciably grow with the prolongation of time at the temperature
出处
《热处理》
CAS
2013年第1期41-46,共6页
Heat Treatment
关键词
微合金结构钢
热模拟
热处理
奥氏体晶粒
microalloy structural steel
thermal simulation
heat treatment
austenitic grain
