焊管Issue(5)：53-57,5.
长输管道自保护药芯焊丝半自动焊典型缺陷分析
Analysis of Typical Defects of Self-shielded Flux Cored Wire Semi-auto Welding for Long-distance Transporting Pipeline
何小东 1仝珂 2梁明华 1朱丽霞 2路彩虹1
作者信息
- 1. 中国石油集团石油管工程技术研究院，西安，710077
- 2. 国家石油管材质量监督检验中心，西安，710077
- 折叠
摘要
Abstract
The ratio of defects of self-shielded flux cored wire semi-auto welding (FCAW) was analyzed statistically on the base of welding procedure qualification of X80 girth welds. The morphology of typical defects was investigated by optical metallographic microscope (OM) and field emission scanning electron microscope (SEM). And the components of slag inclusion in the defects were tested by energy-dispersive spectrometry (EDS) analysis. The results showed that the probability of defects for FCAW is high. The defects that come into being at 6 o’clock and 12 o’clock are more than at 9 o’clock. The typical defects for FCAW are slag inclusions, incomplete fusion and porosity. And the appearances of these defects are cavity, in which the slag inclusions are found. In order to assure the safety of the pipeline running, the effective measures had be propsed.关键词
焊管/X80管线钢管/自保护药芯焊丝/缺陷Key words
welded pipe/X80 line-pipe/self-shielded flux cored wire/defect分类
矿业与冶金引用本文复制引用
何小东,仝珂,梁明华,朱丽霞,路彩虹..长输管道自保护药芯焊丝半自动焊典型缺陷分析[J].焊管,2014,(5):53-57,5.
