摘要
搅拌摩擦焊(FSW)技术已成功地应用于铝合金的薄板及中等厚度板的焊接,但是在焊接铝合金厚板时,被焊件焊缝深层容易出现组织疏松甚至空洞现象。为解决厚板焊接问题,扩大FSW的应用范围,提出导入超声振动能量到FSW的焊缝区。通过对2519铝合金进行对比焊接实验,并对焊缝的微观组织和力学性能进行分析比较。试验结果表明,超声振动能有效地促进焊缝底部金属材料的流动,减小流动阻力,提高焊缝力学性能,细化金相组织。
Friction stir welding was widely used in the aluminium alloy medium thickness plate and thin plate welding, but in the welding slab plate, the weld seam generates microstructure loose or empty welding defects. In order to solve the problem, the ultrasonic vibration energy was imported into the friction stir weld zone. By the comparison of 2519 alloy welding experiments, the weld microstructure and mechanical properties were analyzed. The test results show that the ultrasonic vibration can effectively promote the weld metal material flow of the bottom, reduce the resistance to flow, improve the welding mechanical properties and refine the metallographic microstructure.
出处
《热加工工艺》
CSCD
北大核心
2013年第1期212-214,共3页
Hot Working Technology
基金
湖南省教育厅自然科学研究项目(11C1290)
关键词
超声振动
搅拌摩擦焊
2519铝合金
力学性能
金相组织
ultrasonic vibration
Friction stir welding
2519 A1 alloy
mechanical property
metallographic microstructure
