论文部分内容阅读
以7075铝合金为研究对象,采用自设计的2.5°内凹轴肩三斜面圆锥搅拌头进行搅拌摩擦焊接试验,研究了下压量,搅拌头旋转速度,焊接速度等不同焊接工艺参数对接头质量的影响。通过分析焊接参数、摩擦产热以及材料塑性流动之间的相互影响,揭示缺陷的形成机理及其对焊接接头性能的影响,并提出了相关的预防与工艺优化方案,以降低7075铝合金搅拌摩擦焊接缺陷的形成机率。
Taking 7075 aluminum alloy as the research object, the self-designed 2.5 ° concave shoulders and tricohedron conical stir head was used to carry out the friction stir welding experiment. The effects of different welding parameters such as the amount of pressure, rotation speed of the stirrer and welding speed on the joint quality Impact. By analyzing the influence of welding parameters, frictional heat generation and material plastic flow, the formation mechanism of defect and its effect on the performance of welded joints are revealed. The related prevention and process optimization schemes are proposed to reduce the friction stir friction of 7075 aluminum alloy Solder defects formation probability.