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[1]何家胜,魏玉婷,余依伦,等.异径三通失效分析[J].武汉工程大学学报,2014,(09):59-65.[doi:103969/jissn1674286920140812]
　HE Jia sheng,WEI Yu ting,YU Yi lun,et al.Failure of reducer tee[J].Journal of Wuhan Institute of Technology,2014,(09):59-65.[doi:103969/jissn1674286920140812]
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异径三通失效分析(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2014年09期
页码:
59-65
栏目:
机电与信息工程
出版日期:
2014-09-30

文章信息/Info

Title:
Failure of reducer tee
文章编号:
16742869(2014)09005907
作者:
何家胜 ; 魏玉婷; 余依伦; 吴其 ; 胡洁文; 罗欢
武汉工程大学机电工程学院，湖北 武汉 430205
Author(s):
HE Jiasheng;  WEI Yuting;  YU Yilun;  WU Qi;  HU Jiewen;  LUO Huan
School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205 ,China
关键词:
断裂三通; 检测分析; 应力腐蚀
Keywords:
fracture tee;  test analysis;  stress corrosion
分类号:
TQ055.8
DOI:
103969/jissn1674286920140812
文献标志码:
A
摘要:
为探究武汉市某公司提供的三通断裂件失效原因，首先用三维制图软件绘制了三通的几何模型，导入有限元分析软件进行了应力分析.结果表明，断裂三通失效不是因载荷过大引起的，可能是材料性能不合格或者是材料存在严重缺陷导致的.然后对材料的化学成分、金相组织、材料硬度、断口形貌、微区元素进行了检测分析，发现三通材料镍质量分数少于1.05%，远低于国标镍质量分数大于8%的要求，使不锈钢材料防止电化学腐蚀的能力下降；断口处检测有氯离子存在，且三通存在应力腐蚀现象，有裂纹产生；裂纹扩展到一定尺寸，导致三通发生瞬时断裂.
Abstract:
To explore the failure of piping tee fracture provided by one company in Wuhan, firstly, the geometric model of tee joints was drawn and the stress of the tees with finite element analysis software was analyzed. The result shows that the failure of piping tee fracture is probably caused by disqualification of material properties or material defects rather than overload. Then, the chemical composition, metallographic structure, material rigidity, fracture appearance and micro region element with experimental methods were tested. The content of nickle in this tee material is 1.05%, which is couer than the international standard of 8%, and it affects the performance of materials, especially the ability to prevent electrochemical corrosion; the chloride ions at the point of fracture result in the stress corrosion of tees, thus causing flaws, and the instant fracture of piping tees happens as the flaws extend to a certain size.

参考文献/References:

［1］郭亚明.T型三通管多向挤压成形研究［D］.太原：中北大学，2013.GUO Yaming. Study on extrusion technology with multidirection loading of Tshaped tube ［D］. Taiyuan：North University of China, 2013.(in Chinese) ［2］宋晞明,马俊峰,孙中飞.基于ANSYS软件的钢制三通有限元应力分析［J］.燃气与热力,2012,32(3):B0106.SONG Ximing, MA Junfeng, SUN Zhongfei. ANSYSbased finite element stress analysis of steel tee fitting ［J］. Gas and Heat , 2012,32(3):B0106.(in Chinese)［3］任克强，浦荣春，沈大春，等.异径三通有限元强度分析［J］.石油机械，2007，35（7）：1418.REN Keqiang，PU Rongchun, SHEN Dachun,et al. Analysis of finiteelement strength of reducer tee CPM［J］, Petroleum Machinery, 2007, 35(7)：1418.(in Chinese)［4］李乐.三通管液压成形技术有限元模拟及工艺分析［D］.重庆：重庆大学,2004.LI Le. Finite element simulation and technique analysis of tube hydroforming process［D］. Chongqing：College of Mechanical Engineering Chongqing University ，2004.(in Chinese)［5］轩福贞，李培宁，刘长军，等.等径挤压三通强度分析工程方法［J］.压力容器，2000（5）:3033.XUAN Fuzhen, LI Peining,LIU Changjun, et al. An engineering analysis approach for squeeze equaldiameter tee branch pipe connection strength under internal pressure ［J］.Pressure Vessel , 2000（5）:3033.(in Chinese)

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备注/Memo

备注/Memo:
收稿日期：20140509作者简介：何家胜（1958）,男，湖北武汉人，教授，硕士.研究方向：化工设备、结构强度与失效分析.
更新日期/Last Update: 2014-10-10