管道埋弧自动焊合格率分析  

Analysis of qualified rate of pipeline submerged arc welding

作　　者：薛姣龙 陈晓勇 梁卓 Xue Jiaolong;Chen Xiaoyong;Liang Zhuo(China National Petroleum Corporation First Construction Co.,Ltd.,Luoyang 471000,Henan,China)

机构地区：[1]中国石油天然气第一建设有限公司,河南洛阳471000

出　　处：《机械制造文摘（焊接分册）》2021年第6期27-30,共4页Welding Digest of Machinery Manufacturing

基　　金：盛虹炼化一体化项目1600万吨/年常减压联合装置

摘　　要：采用钨极氩弧焊(GTAW)打底、埋弧焊(SAW)填充和盖面,即GTAW+SAW焊接方法对20钢、L245N钢、A335-P5钢、A335-P22钢及022Cr19Ni10钢的管道焊缝进行了焊接,并进行了RT无损检测,将该结果与传统氩电联焊(GTAW+SMAW)焊件的RT无损检测结果进行了对比分析。RT结果表明,GTAW+SAW不合格率比GTAW+SMAW的低0.75%。随后对GTAW+SAW和GTAW+SMAW的缺陷类型进行了统计分析。统计结果表明,GTAW+SAW对于缺陷的控制效果优于GTAW+SMAW;手工焊中人为因素对焊接合格率影响较大。该文为自动焊接技术在工业管道施工过程中的推广提供了依据。Welding method of backing weld by GTAW and filling weld and covering weld by SAW, namely GTAW+SAW, was used to join pipe welds of 20 steel, L245 N steel, A335-P5 steel, A335-P22 steel and 022 Cr19 Ni10 steel, and RT nondestructive testing was performed. RT result of GTAW+SAW weldments was compared and analyzed with that of GTAW+SMAW weldments. The RT result showed that the unqualified rate of GTAW+SAW was 0.75% lower than that of GTAW+SMAW. Then the defect types of GTAW+SAW and GTAW+SMAW were analyzed statistically. The statistic result showed that GTAW+SAW had better defect control effect than GTAW+SMAW. In manual welding, human factors had a greater influence on the welding qualification rate. This paper provided a basis for the popularization of automatic welding technology in the process of industrial pipeline construction.

关 键 词：埋弧自动焊 一次合格率 缺陷类型 

分 类 号：TG445[金属学及工艺—焊接]