Research on intergranular corrosion susceptibility of Super304H austenitic stainless steel

Super304H奥氏体不锈钢晶间腐蚀敏感性研究 Research on intergranular corrosion susceptibility of Super304H austenitic stainless steel 陈浩 CHEN Hao 1 first-author 蒋奕锋 JIANG Yifeng 1 左敦桂 ZUO Dungui 2 李勇 LI Yong 1 王峰 WANG Feng 1 王演铭 WANG Yanming 1 陈器 CHEN Qi 1 神华国华寿光发电有限公司 神华国华寿光发电有限公司 Shenhua Guohua Shouguang Energy Group Co.,Lid Shenhua Guohua Shouguang Energy Group Co.,Lid 苏州热工研究院有限公司 苏州热工研究院有限公司 Suzhou Nuclear Power Research Institute Co.,Ltd. Suzhou Nuclear Power Research Institute Co.,Ltd. 针对Super304H钢管母材和焊接接头在高温运行过程中发生晶间腐蚀的问题,通过焊接试验、晶间腐蚀试验、金相检验等方法系统开展了Super304H钢管母材和焊接接头晶间腐蚀敏感性的研究。结果表明,随着C含量的减少和Nb/C比的增加,Super304H钢管晶间腐蚀敏感性越低;焊接接头晶间腐蚀敏感性随着焊接热输入量和层间温度的增加呈上升趋势。 Aiming at the intergranular corrosion of base metal and welded joint of Super304H steel pipe during high temperature operation, the intergranular corrosion sensitivity of base metal and welded joint of Super304H steel pipe was systematically studied by welding test, intergranular corrosion test,metallographic examination and other detection means.The results show that the intergranular corrosion susceptibility of Super304H steel pipe decreases when the C content reduces and the Nb/C ratio increases,and intergranular corrosion susceptibility of welded joint increases as the heat input and interpass temperature increase. Super304H钢 C含量和Nb/C比 晶间腐蚀敏感性 层间温度 Super304H steel C content and Nb/C ratio intergranular corrosion susceptibility interpass temperature TG142.71 2022-03-08 4 50