摘要
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 CO 2 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. [
To control the solidification process of metal, a new method, are-ultrasonic, was developed. A high-frequency exciting supply was electromagnetically coupled with conventional welding supply. An are-excited ultrasonic emission was induced successfully in are combustion process. Some signals with different frequencies and currents were used in submerged are welding and CO2 gas-shielded are welding. The effects of are-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 are-ultrasonic of different frequency, and the coarse microstructures in the partially melted zone is refined.
出处
《中国有色金属学会会刊：英文版》
CSCD
2000年第6期712-716,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(59775061)supported by the National Natural Science Foundation of China
