压力容器焊接缺陷磁记忆信号特点

详细信息

The MMM Characteristics of Weld Defects on Pressure Vessels

摘要: 基于磁记忆检测技术进行压力容器预制缺陷应力集中检测,依据预制缺陷位置磁记忆检测信号特点确定压力容器上未熔合、未焊透、局部减薄三种缺陷的磁记忆信号特点,并利用X射线检测结果验证磁记忆定性分析三种缺陷类型的有效性;对压力容器进行水压试验,试验后焊缝残余应力得到释放,焊缝及缺陷位置磁记忆检测信号有所减弱,但通过分析水压试验后压力容器缺陷位置的磁记忆检测信号,可判断部分焊缝缺陷位置出现宏观裂纹扩展缺陷,并利用打磨焊缝方法进行验证.
- 磁记忆检测 /
- 缺陷类型 /
- 压力容器
Abstract: Three types of weld defects of slag inclusion,the lacking of penetration and local thinning were defined by the MMM characteristics which were obtained by the magnetic memory testing of pressure vessels on the locations of prefabricated defects,and were verified by X ray examination,showing the effectiveness of MMM qualitative analysis on three types of defects.After hydrostatic test of pressure vessels,residual stress is released that is to cause magnetic memory testing signal to be weakened.Through analysis of these signals one can however find the macro expansion cracks appearing in some weld defects,which can be verified by polishing the welds.
- Magnetic memory testing /
- Types of defect /
- Pressure vessels

[1]	任吉林,林俊明,池永滨,等.金属磁记忆检测技术[M].北京:中国电力出版社,2000:5-20.
[2]	DOUBV A A.The express technique of welded jointse examination with use of metal magnetic memory[J].NDT&E lnternational,2000,3(6):351-362.
[3]	苏兰海,马祥华,陈工,等.铁磁材料零件疲劳损伤磁记忆检测方法的实验[J].测试技术学报,2009,23(2):145-150.
[4]	任吉林,林俊明,任文坚,等.金属磁记忆检测技术研究现状与发展前景[J].无损检测,2012,34(4):3-11.
[5]	孙玉江,樊建春,徐鹏谊.基于磁记忆检测的钻具螺纹修扣前后应力集中程度的评价[J].无损检测,2014,36(5):6-10.
[6]	刘红光,张卫民,王朝霞,等.基于磁记忆法的焊接缺陷检测技术研究[J].北京理工大学学报,2007,27(9):811-814.
[7]	杜波夫,考罗考利尼柯夫.焊接缺陷的金属磁记忆法检测[J].焊管,2008,31(2):44-48.
[8]	刘红光,张卫民,毛新颜.基于磁记忆检测技术的焊接缺陷多参数识别系统[J].制造业自动化,2009,31(2):7-10.
[9]	邸新杰,李午申.金属磁记忆在焊接缺陷检测领域的研究现状及发展[J].焊接技术,2009,38(2):2-4.
[10]	汪滨波,廖昌荣,骆静,等.金属磁记忆检测技术的研究现状及发展[J].无损检测,2010,32(6):467-474.