梁国俐,武会宾,杨善武,侯敏

• 1:唐山学院机电工程系
• 2:北京科技大学冶金工程研究院
• 3:北京科技大学材料科学与工程学院

摘要(Abstract)：

以加入微量锆船板钢为研究对象,采用Gleeble 3500并结合SEM,TEM等实验方法研究了F40船板钢在大热输入焊接条件下焊接热输入对粗晶热影响区(CGHAZ)微观组织形态的影响。结果表明,从800℃冷却到500℃的时间即t8/5=60 s时,组织转变产物为大尺寸、具有尖锐棱边的M-A(马氏体-奥氏体)组元,成为裂纹源和裂纹扩展的通道,对材料的低温韧性造成损害;随T8/5的增大,位错组态由高密度缠结变化为小角度排列和位错网格;析出相粒子存在明显的溶解和长大现象,对位错的钉扎作用减弱。

关键词(KeyWords)： 焊接热输入;F40船板钢;CGHAZ组织形态

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划(2011BAE25B01)

作者(Author): 梁国俐,武会宾,杨善武,侯敏

DOI: 10.13289/j.issn.1009-6264.2013.05.016

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