摘要
针对用户反映的25MnV矿用圆环链拉伸试验大量断在焊口处的问题，对断裂件的断口、化学成分、显微组织以及夹杂进行了检验分析。结果表明，闪光对焊产生的白斑缺陷是导致圆环链拉伸断在焊口处的根本原因。
According to the complaints from the clients on weld cracking of 25MnV round link mining chain while the tensile test. The fracture, chemical composition, microstructure and inclusion were analyzed and tested. The result showed that the white spot defect arising from the flash butt welding is the real cause of cracking.
出处
《南钢科技与管理》
2014年第4期38-41,共4页
NISCO Technology and Management
关键词
25MnV
圆环链
闪光对焊
断口
白斑
25MnV
round link chain
flash butt welding
fracture
white spot
