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1前言锅炉管板拼接焊缝扳边部位在冲压的变形过程中,承受着很大的应力,易在扳边部位出现开裂。尤其是在管板温度较低的情况下进行冲压,更是如此。为加强制造过程质量控制,《蒸汽锅炉安全技术监察规程》明确规定:管板的拼接焊缝的射线探伤应在加工成型后进行。由于扳边部位的曲率半径很小,在射
1 Foreword Boiler tube plate welding seam edge parts in the stamping deformation process, under great stress, easy to crack in the area of the edge of the pull. Especially in the case of lower tube temperature stamping, even more so. In order to strengthen the quality control of the manufacturing process, “Steam boiler safety technology supervision regulations” clearly stipulates that the ray flaw detection of the tube plate splicing weld should be carried out after processing and forming. As the radius of curvature of the mandrel is very small, the shot