单、双轴肩搅拌摩擦焊焊接接头性能对比与研究  

作　　者：刘赣华[1] 李可 

机构地区：[1]九江职业技术学院,江西九江332000

出　　处：《科技创新与应用》2020年第10期96-97,共2页Technology Innovation and Application

摘　　要：分别采用单、双轴肩搅拌摩擦焊工艺对6mm厚7A05铝合金板材进行焊接实验,对比分析两种焊缝接头的金相组织、力学性能及显微硬度。实验结果表明,双轴肩搅拌摩擦焊能有效消除焊缝根部薄弱及未焊透等焊接缺陷,但双轴肩焊缝产生了非常明显的脆性倾向。双轴肩焊缝接头的抗拉强度可以达到母材的78%,达到单轴肩接头强度的84%。两种焊缝接头区域的显微硬度都低于母材,说明焊缝都发生了软化现象。The welding experiments of 6-mm-thick 7A05 aluminum alloy plates were carried out by single and double shoulder friction stir welding respectively,and the metallographic structure,mechanical properties and microhardness of the two kinds of weld joints were compared and analyzed.The experimental results show that the double-shoulder friction stir welding can effectively eliminate the welding defects such as weak weld root and lack of penetration,but the double-shoulder weld has a very obvious brittleness tendency.The tensile strength of the biaxial shoulder weld joint can reach 78%of the base metal and 84%of the single shoulder joint strength.The microhardness of the joint area of the two kinds of welds is lower than that of the base metal,indicating that the welds have been softened.

关 键 词：搅拌摩擦焊 双轴肩搅拌摩擦焊 金相分析 力学性能 

分 类 号：TG453.9[金属学及工艺—焊接]