304不锈钢密封垫片开裂原因分析
FAILURE ANALYSIS ON 304 STAINLESS STEEL WASHER
摘 要
采用化学成分分析、拉伸试验和断口分析等方法对304不锈钢裂解气压缩机出口法兰密封垫片的开裂原因进行了分析。结果表明：裂纹起源于螺栓槽处,氯离子的应力腐蚀开裂是造成垫片开裂的主要原因。含氯离子的沿海潮湿大气是导致垫片产生应力腐蚀的介质因素,装配不当造成螺栓槽处垫片过大的应力和应变是导致垫片出现应力腐蚀开裂的力学因素。
奥氏体不锈钢
应力腐蚀
沿海大气
washer
austenitic stainless steel
SCC
coastal atmosphere
Abstract
The cracks of 304 austenitic stainless steel washer were studied by means of chemical composition,tensile test and scanning electron spectroscope(SEM). The result showed that the cracks originated from bolt slot and stress corrosion cracks (SCC) were the main reasons of the crack. Chloride containing in the coastal atmosphere and overstress/over-deformation of the washer at the bolt slot caused by improper assembling were responsible for the SCC.
中图分类号 TG142.71
所属栏目 质量控制与失效分析
基金项目
收稿日期 2007/8/9
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备注尤兆宏(1965-),男,高级工程师。
引用该论文: YOU Zhao-hong. FAILURE ANALYSIS ON 304 STAINLESS STEEL WASHER[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2008, 44(11): 646～648
尤兆宏. 304不锈钢密封垫片开裂原因分析[J]. 理化检验－物理分册, 2008, 44(11): 646～648
被引情况:
【1】马小明,李靖, "乙烯裂解炉蒸汽过热器集合管凸缘失效分析",腐蚀与防护 32, 581-584(2011)
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