铸造技术2023，Vol.44Issue(12)：1152-1156,5.DOI:10.16410/j.issn1000-8365.2023.2323
奥氏体不锈钢堆焊层焊接缺陷分析及改进措施
Analysis of Welding Defects of Austenitic Stainless Steel Surfacing Layers and Improvement Measures
摘要
Abstract
Taking the outer cylinder of a nuclear power plant produced by Kocel as an example,when welding an austenitic corrosion-resistant surfacing layer,the surfacing layer area was subjected to nondestructive testing,and the penetration test found that there were signs after welding was completed.Microcracks and slag defects are found after sampling and observation through a microscope.The microcrack defect is due to the deviation of the grain boundary caused by the NbC phase formed at high temperature,and the slag inclusion defect is caused by the material characteristics of austenitic welding consumables.Through"no preheating,small current,low heat input,layer temperature control ≤ 150 ℃,and narrow swing"mode combined with on-site verification welding process,the problems have been successfully solved,providing valuable experience for follow-up similar products.关键词
耐腐蚀堆焊层/过渡层/热裂纹/夹渣/焊接工艺Key words
corrosion-resistant surfacing layer/transition layer/hot crack/slag inclusion/welding process分类
金属材料引用本文复制引用
王龙虎,郭宁,陈得润,马进..奥氏体不锈钢堆焊层焊接缺陷分析及改进措施[J].铸造技术,2023,44(12):1152-1156,5.基金项目
宁夏回族自治区重点研发计划(2023BDE92003) （2023BDE92003）
