Effects of arc-excited ultrasonic on microstructures and properties of weld

来源期刊：中国有色金属学报(英文版)2000年第6期

论文作者：张春雷 吴敏生 洪玉萍 李路明 张雁军

文章页码：712 - 716

Key words：arc-ultrasonic; refined grain; fusion zone; coarse grain zone; heat affected zone

Abstract: To control the solidification process of metal, a new method, arc-ultrasonic, was developed. A high-frequency exciting supply was electromagnetically coupled with conventional welding supply. An arc-excited ultrasonic emission was induced successfully in arc combustion process. Some signals with different frequencies and currents were used in submerged arc welding and CO₂ gas-shielded arc welding. The effects of arc-ultrasonic on the structures and properties of the weld (including the fusion zone, coarse grain zone and heat affected zone) were studied. The results show that more acicular ferrites form in the fusion zone, the toughness is improved under the arc-ultrasonic of different frequency, and the coarse microstructures in the partially melted zone is refined.