Keyhole thermal behavior in GTAW welding process

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• 作者：ZuMing Liu^a ; ^b ; ^{zuming.liu@tju.edu.cn} ; YueXiao Fang^a ; ^{fangyuexiao@tju.edu.cn} ; ShuangLin Cui^a ; ^{cuisl@tju.edu.cn} ; Song Yi^a ; ^{rainbowsong@tju.edu.cn} ; JiaYu Qiu^a ; ^{18222030253@163.com} ; Qu Jiang^a ; ^{Jiangqu@tju.edu.cn} ; WeiDong Liu^a ; ^{liuweidongtju@163.com} ; Zhen Luo^a ; ^{lz@tju.edu.cn}
• 关键词：Vision-based measurement ; GTAW ; Keyhole ; Welding process parameters ; K-TIG ; Thermal behavior
• 刊名：International Journal of Thermal Sciences
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：114
• 期：Complete
• 页码：352-362
• 全文大小：2383 K
• 卷排序：114

文摘

The influence of the welding current and welding speed to the keyhole exit behavior in GTAW welding process is visualized by a vision system. A contrast between the GTAW keyhole and the PAW keyhole is drawn. GTAW welding has larger current range to produce stable keyhole welding process because the free-burning arc has much smaller ratio of arc pressure to current than in PAW process. Keyhole exit diameter grows at a comparable speed with the keyhole deviation distance in GTAW because the free-burning arc efficient diameter is more sensitive to the welding current than in PAW.