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论文类型：期刊论文

发表时间：2010-06-01

发表刊物：China Welding (English Edition)

收录刊物：EI、Scopus

卷号：19

期号：2

页面范围：6-11

ISSN号：10045341

摘要：Double-sided arc welding with a single power source can effectively increase the weld penetration, diminish distortion, improve welding speed and save energy. Compared to conventional arc welding processes, double-sided arc welding can generate a penetrating electromagnetic field to help to form fine dendritic microstructure in the weld due to the symmetry of heating. Type 1Cr18Ni9Ti austenitic stainless steel was bead-on-plate welded with double-sided arc welding and conventional plasma arc welding processes, respectively, and microstructure in the weld, heat-affected zone and base metal were examined. After analyzing the black carbon-enriched band in the weld during plasma arc welding with electron probe microanalyzer (EPMA) and X-ray diffraction (XRD) technology, it was found that the black band was shaped from the aggregation of ferrite in the fusion boundary. Hardness measurement showed that this black band does not apparently affect the microhardness distribution in the weld. ? 2010 Editorial Board of CHINA WELDING.