A-TIG焊接技术在奥氏体不锈钢焊接中的应用研究

Study on A-TIG welding technology for austenitic stainless steel welding

简要介绍了A TIG焊接的工艺特点和国内外发展概况。研究了A TIG焊接技术中活化剂对0Cr18Ni9奥氏体不锈钢焊缝熔深的影响。分别考察对比了不锈钢A TIG焊及普通TIG焊焊接后所得两种焊缝的机械性能、化学成分、金相组织、铁素体含量及焊缝抗晶间腐蚀性能。结果表明:A TIG焊接具有与TIG焊同等优良的焊缝质量,并可大幅度地增加焊缝的熔透量,提高焊接效率。

Process characteristics of ATIG welding and development trend at home and abroad are introduced in this paper. The effect of active flux for ATIG welding on welding penetration of 0Cr18Ni9 austenitic stainless steels weld is investigated. Two kinds of welds made respectively by TIG welding and ATIG welding are compared and evaluated on the basis of tests, including their mechanical properties, chemical composition, metallographic microstructure, ferrite content and intercrystalline corrosion resistance, etc. The results indicate that ATIG welding can result in a significant increase in welding penetration of austenitic stainless, while its weld properties are as good as those by TIG welding. Thus ATIG welding can improve productivity of austenitic stainless steels welding.