压力容器2024，Vol.41Issue(11)：19-25,7.DOI:10.3969/j.issn.1001-4837.2024.11.003
焊后热处理对Alloy33堆焊层耐蚀性的影响
Influence on corrosion resistance of Alloy33 corrosion-resistant layer by PWHT
摘要
Abstract
To investigate the effect of post-weld heat treatment(PWHT)on the corrosion resistance of the Alloy33 overlay,automatic tungsten inert gas welding(TIG)was used to weld the corrosion-resistant layer of Alloy33 onto a 2.25Cr-1Mo base material.The microstructure and mechanical properties of the weld layer were analyzed,revealing that the microstructure of the corrosion-resistant layer in the as-welded state is austenite with a small amount of carbides,while the heat-treated state contains more carbides.The corrosion performance of the corrosion-resistant layer was evaluated using four corrosion standards:ASTM G28-2024 A,ASTM A262-2015 C,ASTM A262-2015 E and GB/T 15260-2016 C.The results indicate that Alloy33 exhibits excellent corrosion resistance in weakly oxidizing media under both as-welded and heat-treated conditions.However,when used in containers with strong oxidizing media,the heat treatment state of the Alloy33 corrosion-resistant layer should be carefully selected according to specific operating conditions.For containers in strongly reducing media,Alloy33 should be avoided.This study provides strong references for improving the design of Alloy33 welding processes and mitigating intergranular corrosion on the inner walls of containers.关键词
2.25Cr-1Mo母材/Alloy33耐蚀层/焊后热处理/腐蚀性能Key words
2.25Cr-1Mo base metal/Alloy33 corrosion-resistant layer/post-weld heat treatment/corrosion properties分类
机械制造引用本文复制引用
张蕾,张雪,刘宝剑,王军杰,类成龙,杨斌,王天先,武靖伟,邵光娟,孔凡红..焊后热处理对Alloy33堆焊层耐蚀性的影响[J].压力容器,2024,41(11):19-25,7.基金项目
国家重点研发计划"严苛环境下典型承压类特种设备结构安全性评价及失效预防技术"(2018YFC0808800) （2018YFC0808800）
泰山学者建设工程"基于结构完整性的高效能源装备制造"(ts201511018) （ts201511018）
