冷丝辅助旋转/摇动电弧窄间隙MAG焊缝成形特性及接头组织性能演变机制

李红, 姜玉清, 曹玉鹏, 王加友, 刘澍彬

Weld Formation Characteristics and the Evolution Mechanisms of Joint Microstructure and Mechanical Properties for Rotating/Swing Arc Narrow Gap MAG Welding Assisted by Cold Wire

LI Hong, JIANG Yuqing, CAO Yupeng, WANG Jiayou, LIU Shubin

表2 焊接参数

Table 2 Welding parameters

Parameter Value Unit Average of Ia ~330 A Average of arc voltage Ua ~32 V Vw 4.25 mm·s-1 Arc swing frequency fS 4 Hz r1 7.36 mm Arc swing amplitude darc 8 mm Arc at-sidewall staying time ts 60 ms Arc rotating frequency fR 25-100 Hz r2 3.6 mm Cold wire swaying amplitude daw 0-4 mm Cold wire feeding rate Vf2 0-5 m·min-1