理化检验-物理分册2025，Vol.61Issue(11)：67-69,3.DOI:10.11973/lhjy-wl240199
42CrMo钢管接头断裂原因
Fracture reason of 42CrMo steel pipe joint
李英1
作者信息
- 1. 天津立林机械集团有限公司,天津 300352
- 折叠
摘要
Abstract
The fracture of 42CrMo steel functional joint produced by a company occurred during installation.The fracture reasons were analyzed by means of macroscopic observation and scanning electron microscope analysis,chemical composition analysis,metallographic examination and mechanical property test.The results show that the fracture property of the joint was brittle fracture,the segregation of the original structure of the material was serious,the quality and toughness of the material after heat treatment were not good,and the impact test results could not meet the design requirements.During the assembly process of the joint,the internal and external threads were not horizontally aligned,and they were subjected to abnormal loads during the installation process,and eventually broke.关键词
42CrMo钢/热处理/管接头/脆性断裂/螺纹Key words
42CrMo steel/heat treatment/pipe joint/brittle fracture/thread分类
通用工业技术引用本文复制引用
李英..42CrMo钢管接头断裂原因[J].理化检验-物理分册,2025,61(11):67-69,3.
