Arc characteristics and weld appearance in pulsed ultrasonic assisted GTAW process

被引：21

作者：

Chen, Chao ^{[1
]}

Fan, Chenglei ^{[1
]}

Cai, Xiaoyu ^{[1
]}

Liu, Zeng ^{[1
]}

Lin, Sanbao ^{[1
]}

Yang, Chunli ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, 92 Xidazhi St, Harbin 150001, Heilongjiang, Peoples R China

来源：

RESULTS IN PHYSICS | 2019年 / 15卷

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

GTAW; Pulsed ultrasound; Arc shape; Weld appearance; Melting energy; MICROSTRUCTURE; PARAMETERS; ALLOY; GMAW;

D O I：

10.1016/j.rinp.2019.102692

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new welding process was named as pulsed ultrasonic assisted GTAW (PU-GTAW). In low-frequency of 1-20 Hz, the arc shape went through from expansion to contraction and re-expansion with the change of pulsed frequency, which was defined as pulsed arc. When the pulsed frequency was excessed 20 Hz, the PU-GTAW arc shape was compressed compared with that of conventional GTAW, which was defined as compression arc. Compression degree of arc shape with the pulsed frequency of 20-50 Hz was less than that of 50 Hz-. When the compression degree of arc was a certain value, the PU-GTAW could obtain the arc shape with the less energy consumption compared with U-GTAW. The melting energy of PU-GTAW was increased by 10% compared to GTAW. The increase of melting energy was the fundamental reason for the increase of geometry parameters of weld appearance in the PU-GTAW.

引用

页数：6

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