补焊对30CrMnSiA高强钢焊接接头力学性能的影响  

Influence of Repair Welding on Mechanical Properties of 30CrMnSiA High Strength Steel Welded Joint

作　　者：张举麟 张华松[3] 李波涛[1] 童明波[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9期85-87,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30CrMnSiA高强钢原始焊接接头和一次补焊接头为研究对象,通过拉伸试验、疲劳试验及显微组织分析等方法研究了补焊对其焊接接头力学性能的影响。结果表明:经过补焊后,30CrMnSiA高强钢焊接接头的力学性能略微降低;热影响区是接头拉伸性能的薄弱部位,而焊趾处是接头疲劳性能的薄弱部位;补焊对焊缝附近的显微组织无明显影响。Using original welded joint and once-repair welded joint of 30 CrMnSiA high strength steel as research objects,the influence of repair welding on mechanical properties of the welded joint was studied by tensile test,fatigue test and microstructure analysis.The results show that the mechanical properties of the welded joint were slightly degraded after repair welding.The weak part of the welded joint in tensile property was heat affected zone while that in fatigue performance was welding toe.The repair welding had little influence on the microstructure around the welding seam.

关 键 词：30CrMnSiA高强钢 补焊 拉伸性能 疲劳性能 

分 类 号：TG457.11[金属学及工艺—焊接]