理化检验-物理分册2018，Vol.54Issue(5)：368-373,6.DOI:10.11973/lhjy-wl201805015
某超临界机组锅炉受热面异种钢焊口开裂原因分析
Cause Analysis on Cracking of Dissimilar Steel Welding Seam of Boiler Heating Surface of a Supercritical Unit
张志博 1马翼超 1范志东 1牛坤 1杨光锐 1马剑民1
作者信息
- 1. 西安热工研究院有限公司,西安710054
- 折叠
摘要
Abstract
Dissimilar steel welding seam of the secondary platen superheater of a supercritical unit cracked and leaked.The cracking reasons of the dissimilar steel welding seam were analyzed by using macroscopic observation,metallographic examination,hardness test,scanning electron microscope analysis and energy spectrum analysis and so on.The results show that the disharmony between the expansion and deformation of the two platen superheater on the same screen leads to the low-cycle fatigue cracking of the dissimilar steel welding seam.On the basis of the analysis of the causes of the cracking of the welding seam,the method of measuring the stress concentration level of the metal magnetic memory was put forward,which can effectively prevent the crack of the dissimilar steel welding seam.关键词
异种钢焊口/低周疲劳开裂/磁记忆检测/应力集中Key words
dissimilar steel welding seam/low-cycle fatigue cracking/metal magnetic memory testing/stress concentration分类
矿业与冶金引用本文复制引用
张志博,马翼超,范志东,牛坤,杨光锐,马剑民..某超临界机组锅炉受热面异种钢焊口开裂原因分析[J].理化检验-物理分册,2018,54(5):368-373,6.
