(中国空气动力研究与发展中心,四川 绵阳 621000)
中图分类号:TJ765.4+1 文献标志码:A doi:10.3969/j.issn.1006-0316.2018.10.016
文章编号:1006-0316 (2018) 10-0073-04
Magnetic Particle Testing and Analysis of Q345R Rolled Pressure Pipe
MA Xuerong,YAO Li,ZUO Jifeng,YUE Kaibai,LU Jun
( China Aerodynamics Research and Development Center, Mianyang 621000, China )
Abstract:For crack welded specimens, the cross-magnetic conjugate method was used, and non-fluorescent black magnetic paste water suspensions, fluorescent magnetic suspensions, as well as the use of electric wire brush grinding treatment, the use of contrast enhancers and other means to the inner and outer surfaces of the weld joint magnetic powder detection, to verify the effectiveness of magnetic powder detection technology and defect detection rate, magnetic trace morphology characteristics, and the identification of defects. The results show that for the non-fluorescent black magnetic paste water suspension, after the electric steel wire brush is polished and the contrast is used, the magnetic marks show clear, the crack characteristics are obvious, it is very easy to distinguish, and the number of magnetic marks shows increases significantly. For fluorescence detection, in the degree of defect identification, no using contrast enhancers can more clearly show the characteristics and shape of the defect, and the contrast is higher.
Key words:pressure piping;magnetic particle testing;crack;detection sensitivity


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