东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (10): 1457-1461.DOI: -

• 论著 • 上一篇    下一篇

高速列车用6005A铝合金厚板的焊接工艺

季凯;祖国胤;姚广春;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-10-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50774021);;

Welding parameters of 6005A aluminum alloy for new high-speed train

Ji, Kai (1); Zu, Guo-Yin (1); Yao, Guang-Chun (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-10-15 Published:2013-06-20
  • Contact: Ji, K.
  • About author:-
  • Supported by:
    -

RichHTML

0

PDF (PC)

1908

摘要： 采用半自动MIG焊完成了厚度为12mm的6005A-T6铝合金板材的连接,通过正交试验研究了焊接工艺参数对焊接接头抗拉强度及焊缝表面质量的影响.结果表明,各工艺参数对焊接接头抗拉强度影响显著性从大到小依次为:焊接电流,焊接电压,焊接速度和预热温度.考虑焊缝表面质量因素,各工艺参数影响显著性从大到小依次为焊接速度、预热温度和焊接电流.本研究条件下最佳MIG焊接6005A-T6板材的工艺参数为:预热温度200℃,焊接电流180A,焊接电压18.0V,焊接速度12mm/s.焊接后试样接头热影响区内晶粒平均尺寸小于5μm,且无过分长大现象.焊接后板材拉断时为韧性断裂.

关键词: 6005A铝合金, MIG焊, 抗拉强度, 焊缝表面成形

Abstract: The 12 mm-thick 6005A-T6 aluminum alloy was welded with ER5356 wire by semi-automatic MIG welding, and the effects of main welding parameters on the tensile strength of weld joints and surface quality of welds were investigated by orthogonal tests. The result showed that the influencing factors on the tensile strength of weld joints can be ranked with the significance of difference considered, as follows: welding current, welding voltage, welding speed and preheating temperature, while the rankings of the influencing factors on the surface quality of welds are: welding speed, preheating temperature and welding current. The optimal MIG welding parameters for the 6005A-T6 plates are: welding current 180 A, welding voltage 18.0 V, welding speed 12 mm/s and preheating temperature 200°C. After welding, there is no overgrown grain founded in the heat affected zone (HAZ) of the alloy specimens, where the average grain size is less than 5 μm. Typically the welded plates show ductile fracture pattern if being pulled apart.

中图分类号: