7A52铝合金搅拌摩擦焊工艺优化  

Friction stir welding process parameter optimization of 7A52 aluminum alloy

作　　者：梁志芳[1,2] 史清宇[1] 康旭[1] 

机构地区：[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

出　　处：《焊接学报》2011年第2期17-20,114,共4页Transactions of The China Welding Institution

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.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.

关 键 词：搅拌摩擦焊 抗拉强度 焊接工艺参数 

分 类 号：TG453[金属学及工艺—焊接]