搅拌摩擦焊焊接速度对AZ31镁合金焊接接头性能的影响  

Effect of Friction Stir Welding Speed on Properties of AZ31 Magnesium Alloy Welding Joint

作　　者：吴智[1] WU Zhi(Siehuan Information Technology College, Guangyuan 628017, China)

机构地区：[1]四川信息职业技术学院,四川广元628017

出　　处：《铸造技术》2018年第6期1318-1320,共3页Foundry Technology

摘　　要：选用单板搅拌摩擦焊方法对AZ31镁合金进行焊接试验,利用光学显微分析、微观硬度分析、拉伸性能测试等方法,对焊接接头的微观组织和力学性能进行研究。结果表明,搅拌摩擦焊对AZ31镁合金焊接接头有明显的细化晶粒效果,且焊缝区硬度分布也随晶粒尺寸的降低而呈逐渐升高的趋势。经搅拌摩擦焊后,AZ31镁合金抗拉强度明显提高。The microstrueture and mechnical properties of AZ31 magnesium alloy weldihg joint, which was prepared by friction stir welding,were studied by optical microscope analysis, micro-hardness analysis and tensile test. The results show that the friction stir welding has obvions effect on fine grain of the welded joint. And the micro-hardness and tensile strength of the welded joint increase with the decrease of grain size due to fine-grain strengthening.

关 键 词：AZ31镁合金 搅拌摩擦焊 微观组织 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG457[金属学及工艺—金属材料]