基于汽车驱动桥壳再制造的堆焊可靠性研究  

Reliability of Welded Surfacing Layer for Remanufacture of Vehicle's Drive Axle Housing

作　　者：沈晔超[1] 宋守许[1] 王玉琳[1] 杜长春 

机构地区：[1]合肥工业大学,合肥230009 [2]合肥美桥汽车传动及底盘系统有限公司,合肥230051

出　　处：《中国机械工程》2013年第5期676-680,共5页China Mechanical Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB013406;2011CB013402);"十一五"国家科技支撑计划资助项目(2008BAC46B01)

摘　　要：为了研究汽车驱动桥壳表面损伤后的堆焊修复层能否满足再制造的要求,选用H13CrMoA和ER50-6焊丝并采用亚激光瞬间熔工艺,在汽车驱动桥壳片表面制备不同厚度的堆焊层。利用金属磁记忆检测仪和扫描电镜分析堆焊试样的应力分布和断面组织特征,同时测试堆焊试样的硬度并进行渗透、磁粉和X射线三种无损检测。结果表明:ER50-6堆焊试样的堆焊层与母材硬度相近,母材热影响区未发生局部软化,堆焊层与母材结合良好,不存在焊接缺陷和应力集中区,应力分布不均匀程度低于H13CrMoA堆焊试样。In order to discuss whether the welded surfacing layer can satisfy the remanufacture conditions when the surface of vehicle drive axle housing was damaged, the weld surfacing layers with different thicknesses were covered on the surface of drive axle housing shells by using H13CrMoA and ER50-6 with sub-melt laser instantaneous technology. The stress distribution of welding specimens was measured by magnetic memory testing device, the characteristics of this section was analyzed by SEM. The hardness was tested and nondestructive testing was made by osmosis, magnetic powder and X-ray. The testing results indicate that ER50-6 welding specimens has the similar hardness with base metal, the heat affected zone of base metal will not be softened partly. Welded surfacing layer is combined well with base metal. Welding defects and stress concentration do not appear. The uneven distribution of stress is less than the H13CrMoA surfacing specimens.

关 键 词：再制造 堆焊 无损检测 应力分布 

分 类 号：TH162[机械工程—机械制造及自动化]