Failure Analysis of the Gray Cast Iron Drain Valve of the Converter Gas Pipe
The valve cover of a gray cast iron drain valve,used by a chemical company,cracked during its operation.The cracking reasons of the valve cover were investigated by fracture appearance observation of the valve cover,metallographic observation,SEM observation,chemical composition analysis of the corrosion products,finite element analysis of the valve cover by ABAQUS and tensile tests and impact tests of the cover sample at normal temperature and -12℃.After these investigation jobs,it was concluded that there was no significant cast defect or original defect in the fracture of the valve cover,the stress was much lower than the strength of valve cover material,and the cracking of the valve cover was caused by the expansion of the ice which was changed from the seeper between the valve cover and valve body when the weather temperature was lower than -12℃.At the end of this article,some proposals were put forward to the company in order to avoid similar accidents.
cracking analysis drain valve gray cast iron converter gas pipe
Guoxin Zhang Junnan Niu Tairui Zhang Yan Liu Weiqiang Wang
School of Mechanical Engineering,Shandong University,Jinan,250061,China;Engineering and Technology Research Center for Special Equipment Safety of Shandong Province,Jinan,250061,China
国际会议
2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)
天津
英文
468-472
2016-05-26（万方平台首次上网日期，不代表论文的发表时间）