DN50不锈钢波纹软管开裂失效分析
Failure Analysis on Cracking of DN50 Stainless Steel Bellows
摘 要
通过宏观检验、扫描电镜观察以及X射线能谱分析等手段,对某304奥氏体不锈钢DN50波纹软管开裂原因进行了分析.结果表明:软管开裂是由于腐蚀疲劳所致,软管的管壁内、外表面在腐蚀介质和外界应力的综合作用下产生沿晶微裂纹和蜂窝状腐蚀形貌,并受到交变应力作用,因而发生双向多源疲劳开裂失效.
波纹软管
腐蚀
疲劳
失效分析
austenite stainless steel
bellows
corrosion
fatigue
failure analysis
Abstract
The cracking reasons of 304 austenite stainless steel DN50 bellows were analyzed by means of macroscopic examination,scanning electron microscope inspection and X-ray energy dispersive spectrum analysis.The results indicate that the cracking of the bellows was induced by corrosion fatigue.Under the comprehensive effect of corrosive mediums and external stress,intergranular corrosion micro cracks and honeycomb shaped corrosive patterns occurred on outer and inner surfaces of the bellows.Under the action of alternating stress,multi-source fatigue fracture failure took place on both sides of the bellows.
中图分类号 TG172.3+2 TG142.71
所属栏目 质量控制与失效分析
基金项目
收稿日期 2013/12/19
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备注苗蓉(1978-),女,讲师,硕士.
引用该论文: MIAO Rong,LIN Jing-na. Failure Analysis on Cracking of DN50 Stainless Steel Bellows[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2015, 51(2): 135～138
苗蓉,林京娜. DN50不锈钢波纹软管开裂失效分析[J]. 理化检验－物理分册, 2015, 51(2): 135～138
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参考文献
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【3】胡世炎.机械失效分析手册[M].成都:四川科学技术出版社,1999.
【4】YUSUKE T,ATSUSHI N,TOORU T.Pitting corrosion mechanism of type 304 stainless steel under a droplet of chloride solutions[J].Corrosion Science,2007,49:1394-1407.
【5】ABD EL MEGUID E A,MAHMOUD N A,ABD EL REHIM S S.The effect of some sulphur compounds on the pitting corrosion of type 304 stainless steel[J].Materials Chemistry and Physics,2000,63:67-74.
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