众所周知,在锅炉、压力容器、压力管道制造和安装过程中,焊接质量非常重要。焊接部位最容易产生焊裂、未熔合、未焊透、咬边、夹杂物和晶界开裂等缺陷,这些缺陷又可能是裂纹源。因此,正确地做好焊接缺陷等级评定工作不仅能保证产品质量,而且能保证产品的安全经济运行。但目前焊接缺陷等级评 As we all know, in the boiler, pressure vessel, pressure pipe manufacturing and installation process, welding quality is very important. The welding parts are most likely to produce defects such as welding crack, unfused, incomplete penetration, undercutting, inclusions and grain boundary cracking, which may be the source of cracks. Therefore, to do a good job of welding defect rating work not only to ensure product quality, but also to ensure the safe and economical operation of the product. But the current welding defect rating rating