汽车后桥差速器电子束焊焊缝显微组织及齿轮焊接变形的研究  

Research on Microstructure of Electron Beam Welding Seam and Deformation of gear in Rear Axle Differential of Automobile

作　　者：钟永丽 于长江 孙超 全军 张学选 黄芝刚 王万儒 朱志赓 封余贤 卢珊珊 

机构地区：[1]广西产研院新型功能材料研究所有限公司,广西南宁530200 [2]方盛车桥(柳州)有限公司,广西柳州545000 [3]中国科技开发院广西分院,广西南宁530015

出　　处：《大众科技》2023年第8期95-99,142,共6页Popular Science & Technology

基　　金：广西科技重大专项(桂科AA21077014)。

摘　　要：针对20CrMnTi材质低碳合金钢差速器壳与被动齿轮的电子束焊接,研究不同电子束流工艺参数对焊缝成形、金相组织、硬度等性能的影响。结果表明,在其他焊接参数不变的情况下,熔深随着电子束流的增大而增大,结合面的焊宽与电子束流成正相关,被动齿轮焊接变形量增加,焊缝组织为粗大的板条状马氏体,热影响区组织分布不均,性能下降。综合焊接质量及齿轮焊接变形量,在其他参数确定的情况下,电子束流45 mA为该种合金钢差速器壳与被动齿轮电子束焊接较优的工艺参数。Aiming at the electron beam welding of differential housing and passive gear of 20CrMnTi mild steel alloy steel,the influence of different electron beam current parameters on the weld forming,microstructure,hardness and other properties of the welding joints was studied.The results show that in the case of other welding parameters remain unchanged,the welding depth increases with the increasing of electron beam current,the welding width of the bonding surface is positively correlated with the electron beam current,the welding deformation of the passive gear increases,and the microstructure of welding seam turns into coarse Slab martensite,the distribution of grain structure in heat-affected zones is unevenand,the performance decreases.Considering the welding quality and the deformation of gear,while other parameters are determined,the 45 mA of electron beam current is the excellent process parameter for electron beam welding of this kind of alloy steel differential housing and passive gear.

关 键 词：差速器 电子束流 显微组织 硬度 变形 

分 类 号：TG457[金属学及工艺—焊接]