5E83铝合金GMAW焊接工艺研究  

Study on GMAW welding process of 5E83 aluminum alloy

作　　者：韩颖[1] HAN Ying(Northeast Light Alloy Co.,Ltd.,Harbin 150060,China)

机构地区：[1]东北轻合金有限责任公司,哈尔滨150060

出　　处：《轻合金加工技术》2023年第1期46-52,共7页Light Alloy Fabrication Technology

基　　金：国家重点研发计划2021YFB3704201。

摘　　要：对8 mm厚5E83铝合金进行单面单道熔化极惰性气体保护焊(GMAW)试验,研究焊接工艺参数对5E83铝合金焊缝成型的影响,观察5E83铝合金焊接接头不同区域的微观组织,确定合适的焊接电流和电弧电压的范围。结果表明:8 mm厚5E83铝合金优化后的焊接工艺参数为焊接电流240~260 A,电弧电压22~26 V。当焊接电流为250 A,电弧电压为22 V时,能取得焊缝熔宽较小且完全焊透、无明显缺陷的焊接接头。焊接接头抗拉强度最高达301 MPa,强度系数为0.82。提高焊接热输入使5E83铝合金GMAW接头显微硬度和抗拉强度降低。The single-side and single-pass GMAW test was conducted on 8 mm thick 5E83.aluminum alloy to study the influence of welding process parameters on the weld formation of 5E83 aluminum alloy,observe the microstructure of different areas of 5E83 aluminum alloy welding joint,and determine the appropriate range of welding current and arc voltage.The results show that the improved welding process parameters of 8 mm thick 5E83 aluminum alloy are 240~260 A welding current and 22~26 V arc voltage.When the welding current is 250 A and the arc voltage is 22 V,the welding joint with small weld fusion width,complete penetration and no obvious defects can be obtained.The maximum tensile strength of welded joint is 301 MPa,and the strength coefficient is 0.82.Increasing the welding heat input reduces the microhardness and tensile strength of the GMAW joint of 5E83 aluminum alloy.

关 键 词：5E83铝合金 GMAW Al3Er粒子 微观组织 性能 

分 类 号：TG166.3[金属学及工艺—热处理]