摘要
研究了直接淬火回火调质钢ＤＱＴＨＴ８０多层焊热影响区的ＣＴＯＤ断裂韧性。焊态和焊后热处理状态下的试验结果表明：焊态下热影响区断裂韧性高于焊后热处理态。焊后热处理降低了该钢热影响区的断裂韧性。焊态下断口呈韧窝状，而焊后热处理断口呈解理状。模拟焊接热影响区粗晶区试验结果进一步证实了焊后热处理对韧性的不利影响。
In this paper, the fracture toughness properties of thick weldment on a quenched and tempered DQTHT80 steel was investigated. The testing results show that the post weld heat treatment (PWHT) deteriorates the toughnees of HAZ of the studied steel.Ductile fructure and cleavage fracture were observed respectively in HAZ for as-welede and post weld heat treated specimens.Moreover,the toughness drop after PWHT was proved by simulation tests on coarse grain zone.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1998年第1期37-41,共5页
Transactions of The China Welding Institution
关键词
热影响区
断裂韧性
焊后热处理
调质钢
directly quenched and tempered steel,fracture toughness,HAZ,post weld heat treatment
