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| 5052/6061异种铝合金薄板搅拌摩擦焊接工艺研究 |
| Friction Stir Welding Process of 5052/6061 Dissimilar Aluminum Alloy Sheet |
| Received:June 10, 2021 |
| DOI：10.3969/j.issn.1674-6457.2022.04.015 |
| 中文关键词: 异种铝合金 搅拌摩擦焊 接头力学性能 正交实验 |
| 英文关键词: dissimilar aluminum alloy friction stir welding mechanical properties of joints orthogonal experiment |
| 基金项目:山东省重点研发计划(2019GGX102023) |
| Author Name | Affiliation | | WANG Yong-qiang | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266000, China | | WANG Jin | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266000, China | | WANG Meng-ting | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266000, China | | LI Bao-ge | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266000, China | | ZHANG Hui | School of Mechanical and Automotive Engineering, Qingdao University of Technology, Shandong Qingdao 266000, China |
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| 中文摘要: |
| 目的 研究焊接速度、搅拌头旋转速度和下压量对异种铝合金搅拌摩擦焊接头力学性能的影响，找出最佳工艺参数，从而进一步提高接头的力学性能。方法 采用正交实验法对1.5 mm厚5052/6061异种铝合金搅拌摩擦焊接进行实验设计，焊接完成后，观察焊缝宏观形貌，然后将试件制成标准拉伸试样进行拉伸实验，拉伸实验完成后用扫描电镜观察焊接接头的断口形貌，最后运用极差分析法和方差分析法分别对实验结果进行分析。结果 在选取的工艺参数范围内，搅拌头旋转速度影响最大，其次是焊接速度，下压量影响最小。当焊接速度为120 mm/min、转速为1 400 r/min、下压量为1.5 mm时，接头抗拉强度达到了最大值194 MPa，伸长率也达到了最大值9.62%。结论 在一定工艺参数范围内，提高焊接速度或搅拌头的旋转速度能显著提高接头的力学性能，而下压量对接头力学性能影响不显著。 |
| 英文摘要: |
| The work aims to study the effects of welding speed, stirring head rotation speed and reduction amount on mechanical properties of friction stir welding joint of dissimilar aluminum alloy and find out the best process parameters, so as to further improve the mechanical properties of the joint. The orthogonal experiment method was used to design the friction stir welding of 5052/6061 dissimilar aluminum alloy with a thickness of 1.5 mm. After the welding was completed, the macroscopic morphology of the weld was observed, and then the specimens were made into standard tensile specimens for tensile test. After the tensile test was completed, the fracture morphology of the welded joint was observed by scanning electron microscope. Finally, range analysis and variance analysis were used to analyze the experimental results. Within the range of selected process parameters, the rotation speed of the stirring head had the greatest effect, followed by the welding speed, and the effect of the reduction amount was the least. When the welding speed was 120 mm/min, the rotating speed was 1 400 r/min, and the reduction amount was 1.5 mm, the tensile strength of the joint reached the maximum of 194 MPa, and the elongation also reached the maximum of 9.62%. In a certain range of process parameters, increasing the welding speed or the rotating speed of the stirring head can significantly improve the mechanical properties of the joint, while the reduction amount has no significant effect on the mechanical properties of the joint. |
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