| 摘要: |
| 基于回归分析对20mm厚7050-T7451铝合金搅拌摩擦焊工艺进行研究。建立并分析了接头抗拉强度与焊接工艺参数之间的回归模型，重点考察搅拌头旋转速度、焊接速度和轴肩下压量对接头抗拉强度的影响规律。结果表明，在试验设定的工艺参数范围内，随着搅拌头旋转速度的增加，接头抗拉强度降低；随着焊接速度的增加，接头抗拉强度先升高后降低，存在峰值；随着轴肩下压量的增加，接头抗拉强度升高。通过优化焊接工艺参数可以使接头抗拉强度达到430MPa。 |
| 关键词: 搅拌摩擦焊 焊接工艺 抗拉强度 |
| 基金项目: |
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| Study on Friction Stir Welding of 7050-T7451 Aluminum Alloy Based on Regression Analysis |
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Zhang Xin Han Dong Wu Jun Yin Kai
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Xi’an Aerospace Power Machine Factory, Xi’an 710025
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| Abstract: |
| The effect of friction stir welding process parameters on tensile strength of 7050-T7451 aluminum alloy plate with 20mm thickness was studied through regression analysis. The regression model between tensile strength of welded joint and welding process parameters (tool rotational speed, welding speed and plunge depth of shoulder) is established and analyzed. The results show that the tensile strength decrease with the increase of tool rotational speed; the relationship between tensile strength and welding speed first goes up and then falls down; the tensile strength increase with the increase of plunge depth of shoulder. Under the optimum parameters, the tensile strength of the joint can reach 430MPa. |
| Key words: friction stir welding welding process parameters tensile strength |
