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论文类型：期刊论文

发表时间：2016-12-01

发表刊物：MATERIALS AND MANUFACTURING PROCESSES

收录刊物：SCIE、EI、Scopus

卷号：31

期号：16

页面范围：2136-2142

ISSN号：1042-6914

关键字：Arc; Fusion; Heating; Indirect; Narrow-gap; Sidewall; Triple; Welding

摘要：A new narrow-gap welding process is proposed by applying triple-wire gas indirect arc (TW-GIA). There are double power supplies and triple wires in this system. Power supplies are only connected between electrode wires and base materials are not linked to power supplies. Since there are different wire arrangements with TW-GIA, this article studies these wire arrangements and their effects on sidewall fusion for narrow-gap welding. Results show that different wire arrangements lead to variant arc behaviors and metal transfer, and consequently they lead to different situation of sidewall fusion. The heat to melt sidewalls is mainly from the indirect arc column and metal transfer with narrow-gap TW-GIA. When side wires deviate from the main wire to opposite directions, heat from arc columns and metal transfer can concentrate toward groove sidewalls. When the whole weld torch is lowered, heat from the indirect arc column and metal transfer increases at the weld bead root.