丰宁抽水蓄能电站蜗壳WDB620D钢GMAW工艺评定及生产应用

GMAW procedure qualification and production application of WDB620D steel for spiral case of Fengning Pumped Storage Power Station

采用熔化极气体保护焊(GMAW)对WDB620D钢进行了焊接工艺评定,对其焊缝进行了NDT无损检测,并对焊接接头进行了拉伸、弯曲、冲击等力学性能试验。试验结果表明,焊接工艺评定的各项力学性能和焊接性能指标都达到了图纸设计和ASMEⅨ标准的各项要求,该GMAW工艺在丰宁抽水蓄能电站的蜗壳制造中进行了应用和验证,并取得了良好的效果。

Welding procedure qualification of WDB620D steel was evaluated by gas metal arc welding(GMAW).Non-destructive testing was carried out on welds of WDB620D steel,and mechanical properties tests of tensile,bending and impact were carried out on welded joints.Test results showed that mechanical properties and weldability indexes of welding procedure qualification met requirements of drawings and ASMEⅨstandard.GMAW process was applied and verified in the volutes manufacturing of Fengning Pumped Storage Power Station,and good results were obtained.