Welding procedure research and application of Q345 steel and 20 steel

Q345R与20钢焊接工艺研究及生产应用 Welding procedure research and application of Q345 steel and 20 steel 薛根奇 XUE Genqi 1 first-author 胡延伟 HU Yanwei 1 袁吉增 YUAN Jizeng 1 河南平高电气股份有限公司 河南平高电气股份有限公司 Henan Pinggao Electric Co., Ltd. Henan Pinggao Electric Co., Ltd. 分析Q345R与20钢的焊接性能,拟定TIG+MAG焊接工艺规程,确定最佳焊接规范参数,进行了焊接工艺试验及评定,并采用渗透检测、射线检测验等方法验证焊缝的表面及内部质量,通过机械性能试验验证焊接接头的性能。结合高压电极锅炉本体与支管焊接结构形式,将试验研究结果应用于高压电极锅炉本体与人孔等支管的焊接,按NB/T 47013.2、NB/T 47013.5的要求对焊缝进行超声检测及渗透检测,检测结果符合相应标准的Ⅰ级质量要求,焊接效果良好。 The weldability of Q345R steel and 20 steel is analyzed, welding procedure TIG+MAG is formulated, the optimum welding specification parameters are determined, welding procedure test and qualification are carried out, the surface and internal quality of weld are verified by penetration testing and radiographic testing, and the properties of welded joints are verified by mechanical properties tests. Combined with the welding structure of high pressure electrode boiler body and branch pipe,the experimental results are applied to the welding of high pressure electrode boiler body and branch pipe. Ultrasonic testing and penetrant testing are performed on the welds according to the requirements of NB/T 47013.2 and NB/T 47013.5, the test results meet the grade Ⅰ quality requirements of the corresponding standards, and good welding results are obtained. 异种钢焊接 Q345R钢 MAG焊 焊接工艺 生产应用 dissimilar steel welding Q345 steel metal active gas arc welding welding procedure welding application TG457.11 2022-03-08 12 51