摘要
为解决水电工程钢闸门焊接中存在的变形大、裂纹敏感性高及接头韧性不足等问题,提出水电工程钢闸门焊接工艺优化方案。采用脉冲气体保护焊工艺,通过优化焊接参数、严格控制预热与层间温度,并实施规范化的焊后热处理,形成了一套完整的工艺优化方案。试验结果表明,优化工艺的Q355B钢焊接接头的抗拉强度达565 MPa,-40℃冲击功提高至78 J,无损检测合格率达到99.8%,显著优于传统焊接方法。
To address the problems such as large deformation,high crack sensitivity and insufficient joint toughness existing in the welding of steel gates for hydropower projects,an optimized welding process scheme for steel gates in hydropower projects is proposed.By adopting the pulse gas shielded welding process,optimizing the welding parameters,strictly controlling the preheating and interlayer temperatures,and implementing standardized post-weld heat treatment,a complete process optimization plan has been formed.The experimental results show that the tensile strength of the Q355B steel welded joint with the optimized process reaches 565 MPa,the impact energy at-40℃increases to 78 J,and the non-destructive testing pass rate reaches 99.8%,which is significantly better than the traditional welding method.
作者
刘墨馨
LIU Moxin(Sinohydro Jiajiang Hydraulic Machinery Co.,Ltd.,Leshan 614100)
出处
《现代制造技术与装备》
2026年第1期153-155,共3页
Modern Manufacturing Technology and Equipment
关键词
焊接工艺
工艺优化
钢闸门
脉冲气体保护焊
水电工程
welding process
process optimization
steel gate
pulse gas shielded welding
hydropower project
