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7A52铝合金搅拌摩擦焊工艺优化
梁志芳1,2, 史清宇1, 康旭1
1.清华大学机械工程系, 北京 100084;2.华北科技学院机电工程系, 北京 101601
摘要:
接头强度是搅拌摩擦焊接头性能的一个重要指标,通过搅拌头旋转频率、焊接速度和轴肩下压量等焊接工艺参数的不同组合制备了35个7A52焊接试板,对试板进行拉伸试验检测了接头的抗拉强度,建立并分析了焊接接头抗拉强度与焊接工艺参数之间的回归模型,搅拌头旋转频率n,焊接速度v和轴肩下压量deta单独变化时,接头抗拉强度都有峰值存在,并且搅拌头旋转频率和焊接速度对接头抗拉强度的影响存在交互作用n/v.结果表明,通过优化焊接参数可以使得接头抗拉强度达到384.06 MPa.
关键词:  搅拌摩擦焊  抗拉强度  焊接工艺参数
DOI:
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基金项目:
Friction stir welding process parameter optimization of 7A52 aluminum alloy
LIANG Zhifang1,2, SHI Qingyu1, KANG Xu1
1.Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;2.Department of Mechanical & Electrical Engineering, North China Institute of Science & Technology, Beijing 101601, China
Abstract:
The joint strength of friction stir welding is an important indicator of performance.Through different combinations of welding parameters such as tool rotation rate,tool traverse speed and target depth,35 friction stir welded test plates of 7A52 aluminum alloy are prepared.The tensile strength of welded joints of the test plates is detected by tensile test.The regression model between the tensile strength of welded joints and welding process parameters is established.When the tool rotation rate n,the tool traverse speed v or the target depth deta individually changes,there is a peak of joint tensile strength.The tool rotation rate and the tool traverse speed interactively impact the tensile strength by means of n/v.It is proved that the optimized welding parameters can make joint tensile strength be up to 384.06 MPa.
Key words:  friction stir welding  tensile strength  welding process parameter