摘要
临氢环境下金属压力容器的焊接质量直接影响其安全可靠性,而氢环境会显著恶化材料焊接性能。针对传统焊接工艺热输入控制不精确的问题,提出一种临氢工况下金属压力容器焊接改进工艺,采用脉冲电流气体保护焊替代传统电弧焊,优化焊前预热、焊接参数匹配及焊后热处理3个环节。实验研究表明,改进工艺获得的接头抗拉强度达562 MPa,晶粒尺寸仅为8.7 μm,内部缺陷等级达Ⅰ级,各项性能指标均优于传统埋弧焊工艺。
The welding quality of metal pressure vessels in hydrogen environments directly affects their safety and reliability,and the hydrogen environment significantly deteriorates the welding performance of materials.Aiming at the problem of inaccurate heat input control in traditional welding processes,an improved welding process for metal pressure vessels under hydrogen exposure conditions is proposed.Pulsed current gas shielded welding is used to replace traditional arc welding,and three steps are optimized:pre-heating,welding parameter matching and heat treatment after welding.Experimental studies show that the tensile strength of joints produced by the improved process reaches 562 MPa,with a grain size of only 8.7μm and internal defect levels reaching GradeⅠ,and the performance indicators are better than those of the traditional submerged arc welding process.
作者
李家
LI Jia(Tianjin Tiexin Environmental Protection Equipment Co.,Ltd.,Tianjin 300000)
出处
《现代制造技术与装备》
2025年第7期150-152,共3页
Modern Manufacturing Technology and Equipment
关键词
压力容器
临氢工况
脉冲电流气体保护焊
pressure vessel
hydrogen exposure condition
pulsed current gas shielded welding
