冷凝塔地脚螺栓断裂失效分析  

Failure Analysis on Barb Bolt of a Condensing Tower

作　　者：谷志刚[1] 杜宏建 李伟航 由向群[1] 

机构地区：[1]辽宁工学院材料与化学工程学院,辽宁锦州121001 [2]锦州石油化学公司,辽宁锦州121001

出　　处：《机械工程材料》2007年第2期59-61,共3页Materials For Mechanical Engineering

摘　　要：通过宏观、化学成分、金相、断口与能谱分析等方法,对冷凝塔地脚螺栓的断裂进行了失效分析。结果表明:螺栓在服役2 a后就发生了断裂,主要是因为螺栓加工不良和钢中存在严重的偏析与夹杂物等冶金缺陷;在交变拉应力作用下,使得螺栓在螺纹沟处发生脆性疲劳断裂。The failure of the barb bolts in a condensing tower was studied by means of macrostructure,composition,metallography,fractography,EDS etc.The bolts was fractured after used for two years,resulting from bad working and serious metallurgical defects,such as segregation and inclusion.The cracks are originated in the bottom of the screw thread due to fatigue fracture.

关 键 词：地脚螺栓 断口 冶金缺陷 疲劳断裂 

分 类 号：TG146.1[一般工业技术—材料科学与工程]