摘要
以不同焊接热循环分别联合不同拘束应变循环两模拟试验结果,证明在同一热循环作用下,随着拘束应变量的增大使15MnMoVNRe钢CCT图中的B_?和M_?点逐次向左上方移动,从而对其显微组织和其精细结构发生了显著的作用,导致其韧性各异。当有该应变存在时所获得的韧性均高于无拘束应变的,并且该应变ε_max为1%时韧性最高。
The influence of restraint strain strain in welding on transformation behavior in CGHAZ for
15MnMoVNRe steel have been studied by using simulator Gleeble simulator Gleeble 1 500.It was found that the trans-
formation behavior in CGHAZ was not only a function of thermal cycle but aaso of restraimt strain cy-
cle.Both B. and M. temperatures were elevated resulting from the strain during cooling stage of thermal
Cycle.
The.contrlbution of the Strain the improvement of charpy energy was: the impact energy of
CGHAZ in the case of thermal cycle(t_(?/=9s)combined with strain cycle((?)=1%)was increased
over 30% as compared with that in the case of the. same thermal cycle without any strain cycle.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1992年第3期33-40,共8页
Journal of Xi'an Jiaotong University
关键词
焊接近缝区
韧性
应变
相变
Phase transformation
strain
toughness
