Al-Si-Cu-Ni-Mg系活塞铝合金摩擦焊接头性能分析  

Performance Analysis of Friction Welding Joint of Al-Si-Cu-Ni-Mg Piston Aluminum Alloy

作　　者：吴玮[1,2] 张广川 戚浩杰 黄宏 邓展鹰 殷相杰 WU Wei;ZHANG Guangchuan;QI Haojie;HUANG Hong;DENG Zhanying;YIN Xiangjie(College of Materials science and Engineering,Chongqing University of Technology,Chongqing 400054,China;Chongqing Municipal Engineering Research Center of Institutions of Higher Education for Special W elding Materials and Technology,Chongqing 400054,China;Shaanxi Hande Axle Co.,Ltd.,Baoji 722408,China)

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054 [2]重庆市特种焊接材料与技术高校工程研究中心,重庆400054 [3]陕西汉德车桥有限公司,陕西宝鸡722408

出　　处：《重庆理工大学学报（自然科学）》2020年第9期167-173,208,共8页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆理工大学研究生科研创新项目(ycx20192035)。

摘　　要：高性能Al-Si-Cu-Ni-Mg系活塞铝合金在活塞材料中占据重要地位。采用摩擦焊接技术制造此类材料的复合型活塞,具有不可忽视的技术优势。针对Al-Si-Cu-Ni-Mg系活塞铝合金,进行了一系列的惯性摩擦焊接研究,并采用二次电子扫描、能谱分析、抗拉强度测试等方法对焊接接头进行了表征。研究结果表明:较低摩擦转速下接头存在明显缺口,随着摩擦转速的增加,接头外观形貌逐渐改善,当转速升高到1500 r/min时,仅存在很小的孔状缺陷;摩擦焊接转速1200 r/min时,接头的抗拉强度为105.4 MPa,断裂发生在焊缝处;转速增大到1300 r/min时,接头强度为146.3 MPa,断裂发生在热机影响区;转速达到1500 r/min时,接头强度升高到177.9 MPa,断裂同样发生在热机影响区。High performance al-Si-Cu-Ni-Mg piston aluminum alloy occupies an important position in piston materials.The composite piston made of this material by friction welding technology has the technical advantage that cannot be ignored.Aiming at al-Si-Cu-Ni-Mg piston aluminum alloy,the project team carried out a series of inertial friction welding research,and characterized the welded joint with certain scientific method.The results show that there was an obvious defect in the joint at a low friction speed.With the increase of friction speed,the appearance of the joint was gradually improved.When the speed increased to 1500 r/min,only small pore defects existed.When the friction welding speed was 1200 r/min,the tensile strength of the joint was 105.4 mpa,and the fracture occurred at the weld.When the rotating speed increased to 1300 r/min,the strength of the joint was 146.3 mpa.The fracture occurred in the thermo-mechanical affected area,and when the speed reached 1500 r/min,the strength of the joint increased to 177.9 MPa and the fracture also occurred in the thermo-mechanical affected area.

关 键 词：活塞 铝合金 惯性摩擦焊 

分 类 号：TG453[金属学及工艺—焊接]