金属加工（热加工）Issue(5)：56-62,7.
SiN奥氏体不锈钢配套焊接材料抗热裂敏感性与焊接接头性能研究
Research of hot cracking sensitivity and welded joints performance for matching weld materials of SiN austenitic stainless steel
摘要
Abstract
By controlling the Ni and Cr equivalents,six types of matching welding materials for SiN austenitic stainless steel were designed and prepared.The hot cracking resistance of the fillers was evaluated using a circular block welding test,and the optimal filler composition was determined.Furthermore,the mechanical properties and nitric acid corrosion resistance of the welded joints were tested.The results indicate that no welding hot cracks occur when the δ-ferrite content in the weld metal reaches 8.2％.Compared with 304L stainless steel,the welded joints of SiN stainless steel exhibit higher tensile strength.In a simulated spent fuel reprocessing solution(6M nitric acid containing a certain concentration of oxidizing cations)at 95℃,the corrosion rate of the SiN stainless steel welded joint is approximately 0.1 mm/a,only one-fourth of the corrosion rate of the 304L stainless steel welded joint.关键词
SiN奥氏体不锈钢/焊接材料/δ-铁素体/耐硝酸腐蚀Key words
SiN austenitic stainless steel/welding materials/δ-ferrite content/nitric acid corrosion resistance引用本文复制引用
白林,陆善平,董文超,郭城湘,陈锋,徐磊,王宇欣..SiN奥氏体不锈钢配套焊接材料抗热裂敏感性与焊接接头性能研究[J].金属加工（热加工）,2026,(5):56-62,7.基金项目
乏燃料溶解器技术第三阶段研究(KY22002). （KY22002）
