理化检验-物理分册2017，Vol.53Issue(6)：449-452,4.DOI:10.11973/lhjy-wl201706017
地铁钢轨轨腰开裂失效分析
Failure Analysis on Cracking of a Metro Rail Waist
李二勇 1王建 1张奕梁1
作者信息
- 1. 深圳市帆泰检测技术有限公司, 深圳 518055
- 折叠
摘要
Abstract
By means of chemical composition analysis, macro and micro fracture analysis, metallographic analysis, hardness test and so on, the cracking reasons of a metro rail at the rail waist were analyzed.The results show that the poor weld bead surface quality, the existence of net ferrite in the weld center and the excessive non-metallic inclusions in the base metal, caused brittle cracking of the rail at the rail waist under the action of external stress.Finally, the improvement measures were put forward according to the causes of the rail cracking.关键词
轨腰/焊缝缺陷/网状铁素体/夹杂物/脆性开裂Key words
rail waist/weld defect/reticular ferrite/inclusion/brittle cracking分类
交通工程引用本文复制引用
李二勇,王建,张奕梁..地铁钢轨轨腰开裂失效分析[J].理化检验-物理分册,2017,53(6):449-452,4.
