2024铝合金圆柱形组合的FHPP试验分析
Experimental analysis on friction hydro pillar processing of cylindrical coupling of 2024 aluminum alloy
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摘要: 在国内首台摩擦叠焊设备上实现了2024铝合金/2024铝合金摩擦液柱成形(FHPP)连接,金属棒消耗段的直径为14 mm,预钻孔深为25 mm,孔径为16 mm,主要研究了转速和保护气体对FHPP成形质量的影响,通过金相显微镜、显微硬度仪等测试手段分析了试样的微观组织性能.结果表明,转速过低导致母材和金属棒无法接合甚至出现马达不能正常工作现象,采用转速为5 000 r/min,进给速度为0.5 mm/s的组合,可得到较好的焊缝;施加保护气体能更进一步改善FHPP的成形质量,接合线较未加保护气体时明显细化,金属棒上端材料和母材达到了良好接合.Abstract: The cylindrical coupling of 2024 Aluminum alloy was welded by friction hydro pillar processing(FHPP) in the first domestic friction stitch welding machine.The diameter of the consumed metal stud is 14 mm, the depth and diameter of the pre-drilled hole are 25 mm and 16 mm respectively.The effects of rotational speed and shielding gas on the FHPP quality were mainly studied, and the microstructure and its properties of the sample were analyzed by means of some measuring apparatus such as optical microscope and microhardness tester etc.The results indicate that the low rotation can form the insufficient bonding, even result in the cease of the weld head motor during the welding.The quality of welded joint is better when the rotational speed is 5 000 r/min and the feeding rate is 0.5 mm/s.The shielding gas can improve the quality of FHPP with thinner fusion line, and the upper part of the metal stud is bonded to the base metal very well.
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期刊类型引用(9)
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