论文部分内容阅读
为提高下向焊大口径管的焊接质量，针对下向焊大口径管的焊接工艺特点，选择适当的射线透照工艺和技术参数，对下向焊大口径管对接焊缝进行100％X射线探伤。通过所拍x光底片，分析焊接时生成缺陷的类型、位置以及产生原因。“,”In order to improve next to the large diameter of pipe welding quality and to aim at the welding process characteristics of next to the large-diameter welded pipe, the appropriate radiographic process and technical parameters were selected for 100% film r