摘要
12Cr2MoWVTiB钢管在使用过程中早期穿孔失效,穿孔处存在明显的壁厚减薄。为了弄清穿孔原因,通过宏观观察、扫描电镜分析、光学显微观察对试样进行了深入探讨,结果表明:钢管在较高温度高压下运行,长期受管内腐蚀性介质冲蚀,局部内壁不断减薄,同时减薄部位出现蠕变孔洞,当减薄及蠕变孔洞发展到一定阶段时,不足以承受管内压力,最终导致穿孔失效。
Observing early perforation failure of 12Cr2MoWVTiB steel pipe in the process of use,the researchers discovered obvious wall thickness decrease around the perforation area.In order to find out how the perforation happened,the sample was analyzed by means of macroscopic observation,Scanning Electronic Microscope and metallography microscope.It shows that failure is caused by continuous corrosion and thinning.The steel tube runs at high temperature and high pressure,after being eroded by corrosive medium in the tube for a long time,the inner wall is continuously thinned,and creep holes appear in the thinned part.When the thinning and creep holes develop to a certain stage,the thickness of the pipe is not enough to bear the pressure inside eventually leads to the tube failure.
作者
张彦文
苏明国
陶勇
Zhang Yanwen;Su Mingguo;Tao Yong(Technology Center of Wuhan Iron and Steel Company, Wuhan 430080, Hubei;Wuhan Dehua Test Engineering Co., LTD., Wuhan 430013, Hubei;Quality inspection Center of Wuhan Iron and Steel Company, Wuhan 430080, Hubei)
出处
《武汉工程职业技术学院学报》
2020年第2期32-35,共4页
Journal of Wuhan Engineering Institute
关键词
穿孔
腐蚀
减薄
蠕变
高温蠕变
失效分析
perforation
corrosion
thinning
creep
high temperature creep
failure analysis
