20钢吊环螺钉断裂分析  

Fracture Analysis of 20 Steel Lifting Eye Bolt

作　　者：王建奇[1] 李海霞[1] 王梅英[1] 张小伍[1] 

机构地区：[1]哈尔滨汽轮机厂有限责任公司,黑龙江150046

出　　处：《大型铸锻件》2016年第4期34-36,共3页Heavy Casting and Forging

摘　　要：通过对20钢吊环螺钉的宏观检查、化学成分、金相显微组织、断口形貌以及断口微区成分等进行分析,确定了吊环螺钉的断裂原因。结果表明:吊环螺钉断裂的性质为脆性断裂,吊环螺钉装卡不当、螺纹处加工质量不高以及材质上的不足是吊环螺钉断裂的主要原因。By analyzing the macroscopic test, chemical composition, metallographic structure, fracture appearance and micro-area composition of fracture, the fracture reason of lifting eye bolt has been determined. The results show that the property of faeture for lifting eye bolt is the brittle fracture. Meanwhile, the main reason of fracture is due to the incorrect assembling of lifting eye bolt, the poor machining quality of screw thread, and the shortage of material.

关 键 词：20钢 吊环螺栓 断裂 

分 类 号：TG115[金属学及工艺—物理冶金]