Welding Procedure &amp; Residual Stress of 6082 6082-T6 Aluminum Alloy Medium Plate Butt Welded Joint by High-frequency Pulse MIG Welding Process

ZHANG Ya; DAI Zhongchen; LI Dongfeng; QU Zongqing; LIU Yuyang; WANG Wenchao; DING Chenggang; FENG Han

doi:10.7512/j.issn.1001-2303.2023.12.12

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Welding Procedure & Residual Stress of 6082 6082-T6 Aluminum Alloy Medium Plate Butt Welded Joint by High-frequency Pulse MIG Welding Process
Vol. 53, Issue 12, Pages: 76-80(2023)
Received：05 October 2023，

Revised：2023-11-12，

Published：25 December 2023
DOI： 10.7512/j.issn.1001-2303.2023.12.12
稿件说明：

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张亚，戴忠晨，李东风，等.6082铝合金中厚板高频脉冲MIG对接焊工艺及接头的残余应力［J］.电焊机，2023，53（12）：76-80. DOI： 10.7512/j.issn.1001-2303.2023.12.12.

ZHANG Ya, DAI Zhongchen, LI Dongfeng, et al.Welding Procedure & Residual Stress of 6082 6082-T6 Aluminum Alloy Medium Plate Butt Welded Joint by High-frequency Pulse MIG Welding Process[J].Electric Welding Machine, 2023, 53(12): 76-80. DOI： 10.7512/j.issn.1001-2303.2023.12.12.

摘要

采用高频脉冲MIG焊和常规脉冲MIG焊进行了6082-T6铝合金8 mm厚板的对接焊工艺试验（焊接接头条件：焊接间隙1 mm，钝边为0.5 mm、坡口角度分别为50°和60°），对比分析了焊缝成形规律及焊后焊趾处的残余应力值。研究结果表明：两种焊接方法的焊缝成形质量良好，与常规脉冲MIG焊相比，高频脉冲MIG焊根部熔深较大，坡口角度为50°时，在相同的热输入（10.7 kJ/cm）条件下，根部熔宽增加约20%，坡口角度60°时，根部熔宽增加约16%；与常规脉冲MIG焊相比，高频脉冲MIG焊的气孔敏感性较小，焊接残余应力较小。坡口角度为60°时，横向残余应力（

）降低约为18.5%，纵向残余应力（

）下降约为8.3%；坡口角度为50°，横向残余应力（

）降低约为18%，纵向残余应力（

）下降约为7%；坡口角度由60°减小为50°，高频脉冲焊焊趾处的残余应力下降约6%。

Abstract

In this paper

welding procerure test of 6082 aluminum alloy medium plate butt joint were done using high-frequency pulse MIG welding and conventional pulse MIG welding processes with a 1 mm gap

plate thickness 8 mm

and a groove angle of 50° and 60° respectively; The macroscopic morphology of welded joints(welding appearance)and the residual stress at welding toe after welding were studied. The experimental results showed that welding appearance were better for two welding processes

compared with conventional pulse MIG welding process

high-frequency pulse MIG welding process possessed deeper penetration

wider fusion width

lower porosity sensitivity and welding residual stress. Compared with conventional pulse MIG welding process

when groove angle was 50°

at the same welding heat imput(10.7 kJ/cm)

root fusion width increased about 20% by high-frequency pulse MIG welding process

about 16% when 60° groove angle.Transverse residual stress(

) at welding toe decreased about 18.5% when groove angle was 60° by high-frequency pulse MIG welding process

about 8.5% for longitudinal residual stress(

).When groove angle was 50°

transverse residual stress(

) at welding toe decreased about 18%

7% for longitudinal residual stress(

) by high-frequency pulse MIG welding process.Decreased from 60° to 50° for groove angle

residual stress at welding toe decreased about 6% by high-frequency pulse MIG welding.

关键词

Keywords

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