[1]张彦文,王继辉,冀运东,等.电机配水环管焊缝裂纹原因分析[J].焊管,2007,30(6):36-38.[doi:1001-3938(2007)06-0036-03]
 ZHANG Yan-wen,WANG Ji-hui,JI Yun-dong,et al.Electric Machinery Water Distribution Ring Pipe Crack Analysis[J].,2007,30(6):36-38.[doi:1001-3938(2007)06-0036-03]
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电机配水环管焊缝裂纹原因分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
30
期数:
2007年第6期
页码:
36-38
栏目:
试验与研究
出版日期:
2007-11-28

文章信息/Info

Title:
Electric Machinery Water Distribution Ring Pipe Crack Analysis
文章编号:
1001-3938(2007)06-0036-03
作者:
张彦文12王继辉1冀运东1吴立新2
(1.武汉理工大学 材料科学与工程学院;2.武汉钢铁公司研究院)
Author(s):
ZHANG Yan-wenWANG Ji-huiJI Yun-dongWU Li-xin
关键词:
电机配水环管立缝消除应力热处理沿晶开裂再热裂纹
Keywords:
vertical welding fusion line for water distribution ring pipe of a electric machinerySR heat treatmentintergranular (IG) fracturereheat crack
分类号:
TG44
DOI:
1001-3938(2007)06-0036-03
文献标志码:
A
摘要:
某设备制造厂电机配水环管立缝在消除应力热处理后,熔合线附近出现裂纹。钻孔截取裂纹局部,肉眼可见裂纹表面呈暗褐色。通过扫描电镜、能谱仪及光学显微镜对裂纹产生原因进行了深入分析,认为该裂纹属高温形成的再热裂纹,可以通过改变预热、后热温度,提高焊接质量以降低应力集中等方法来防治。
Abstract:
A crack is found? after SR heat treatment in the vertical welding fusion line for water distribution ring pipe of a electric machinery.Part of the crack is cut by drill,the crack surface is dust-colour under naked eyes.Microcosmic appearance is intergranular(IG) fracture under SEM.Energy chart shows that more Mn and O is enrichment at craze grain boundary.Optical microscope photos shows the crack come of fusion line,then it enlarges along overheat area near fusion line.So the crack is reheat crack,it can be prevented and cured by changing warm-up and post heat temperature,improving weld quality to reduce stress concentration.

参考文献/References:

[1]陈伯蠡.焊接冶金原理[M].北京:清华大学出版社,1991.
[2]张文钺.焊接冶金学(基本原理)[M].北京:机械工业出版社,1996.

备注/Memo

备注/Memo:
张彦文(1972-),男,湖北孝感人,焊接工程师,在读博士生,研究方向为金属材料失效分析。
收稿日期:2007-04-26
更新日期/Last Update: