16MnD5钢板焊接件热影响区开裂原因分析  

Cause Analysis on Heat Affected Zone Cracking of Weldments of 16MnD5 Steel

作　　者：王新娟[1] 王莹[1] 夏从鑫[1] 

机构地区：[1]哈电集团(秦皇岛)重型装备有限公司,秦皇岛066206

出　　处：《理化检验（物理分册）》2011年第12期796-798,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用化学成分分析、低倍检验、金相检验、显微硬度测试等方法对16MnD5低合金高强度钢板焊接件热影响区开裂的原因进行了分析。结果表明:裂纹起始于热影响区粗晶区,裂纹以沿晶和穿晶混合方式扩展,为以残余应力和母材淬硬倾向为主因的冷裂纹。Cause analysis was conducted on the heat affected zone（HAZ） cracking of a high strength low alloy 16MnD5 steel plate weldment by the methods of chemical compositions analysis,macroscopic examination,metallographic examination and microhardness test.The results show that the crack began from the coarse grain zone of the HAZ,and extended in the mixed manner of intergranular and transgranular.The crack was cold crack which was mainly caused by residual stress and the base metal＇s tendentiousness of harden quenching.

关 键 词：16MnD5钢板焊接件 焊接热影响区 冷裂纹 残余应力 淬硬倾向 

分 类 号：TG457.11[金属学及工艺—焊接]