压力容器2024，Vol.41Issue(7)：6-16,11.DOI:10.3969/j.issn.1001-4837.2024.07.002
焊接方法对奥氏体不锈钢焊接接头低温冲击性能的影响
Effect of welding methods on low temperature impact properties of austenitic stainless steel welded joints
摘要
Abstract
To investigate the impact of low temperature impact performance of austenitic stainless steel welded joint on the safety of low temperature pressure vessels.The effects of three welding methods,GTAW,GMAW and SAW,on the low temperature impact performance of S30408 and S31608 austenitic stainless steel joints were studied by low temperature impact test at-196℃.For S30408 welded joint,the low temperature impact performance parameter of the heat affected zone is smaller than that of the base metal and weld zone,which becomes the weak position.Among the three welding methods,the impact performance parameters of welded joint obtained by GTAW are at the optimal level in the heat affected zone.For the low temperature impact performance of S31608 welded joint,the difference between weld,heat affected zone and base metal is small.Among the three welding methods,the result of the welded joint by SAW is similar to that of the base metal in terms of impact absorption energy,and better comprehensive impact performance of the welded joint can be obtained.The comparison of fracture morphologies of welded joints under different welding processes shows that the impact fracture morphologies of welded joints in different regions are consistent with the results of low temperature impact parameters.The research work provides a reference for the selection of welding method of low temperature austenitic stainless steel pressure vessel.关键词
奥氏体不锈钢/焊接接头/低温冲击/冲击韧性Key words
austenitic stainless steel/welded joint/low temperature impact/impact toughness分类
机械制造引用本文复制引用
苏文娟,管凌峰,方俊,王康帅,彭剑..焊接方法对奥氏体不锈钢焊接接头低温冲击性能的影响[J].压力容器,2024,41(7):6-16,11.基金项目
国家自然科学基金项目(52075050) （52075050）
江苏省高等学校基础科学(自然科学)研究重大项目(23KJA460002) （自然科学）
江苏省特种设备安全监督检验研究院科技项目(KJ(Y)2023002) （KJ(Y）
