补焊对5A06铝合金焊接接头力学性能的影响  

Influence of Repair Welding on Mechanical Properties of 5A06 Aluminum Alloy Welded Joint

作　　者：张举麟 李波涛[1] 张华松[3] 童明波(指导)[1] 

机构地区：[1]南京航空航天大学,飞行器先进设计技术国防重点学科实验室,南京210016 [2]中国航发商用航空发动机有限责任公司,上海200241 [3]中国电子科技集团公司第五十五研究所,南京210016

出　　处：《机械工程材料》2017年第8期84-86,共3页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(11302105);航空基金资助项目(2014ZF52074)

摘　　要：以5A06铝合金焊接模拟件的一次焊接接头和二次焊接(补焊)接头为研究对象,通过拉伸试验、疲劳试验,以及对疲劳断口形貌观察,研究了补焊对该焊接接头力学性能的影响。结果表明:补焊会造成焊接接头力学性能的下降,其中静强度和中值疲劳强度下降明显;焊缝是接头拉伸强度与疲劳性能的薄弱部位,补焊会造成焊缝附近金属晶粒粗大。With the initial welded joint and second（ropair welding）welded joint of the simulated welded part of 5A06 aluminum alloy as research objects,the influence of repair welding on the mechanical properties of the welded joint was studied by tensile test,fatigue test and fatigue fracture morphology observation.The results show that the repair welding decreased the mechanical properties of the welded joint,especially decreased the static strength and median fatigue strength significantly.The weld seam was the weak part of the welded joint in tensile strength and fatigue performance,and the repair welding gave rise to the coarse grains of the metal near weld seam.

关 键 词：5A06铝合金 焊接模拟件 补焊 疲劳性能 

分 类 号：TG457.14[金属学及工艺—焊接]