电工纯铁在真空扩散焊过程中的变形研究  

Study on Deformation of Electrical Pure Iron during Vacuum Diffusion Welding

作　　者：陈鑫 刘明举 尹凡 李忱 CHEN Xin;LIU Mingju;YIN Fan;LI Chen(Nanjing Electromechanical Hydraulic Engineering Research Center of Aviation Industry,Nanjing 211102,China)

机构地区：[1]中国航空工业集团公司金城南京机电液压工程研究中心,江苏南京211102

出　　处：《热加工工艺》2025年第3期60-64,共5页Hot Working Technology

基　　金：基础加强计划技术领域基金资助项目(2021-JCJQ-JJ-0181)。

摘　　要：扩散焊焊接的线圈骨架零件(电工纯铁+不锈钢)具有焊缝界面平整,尺寸精度高,焊接质量优良等优势,在液压舵机产品上得到了广泛应用。在某新型线圈骨架产品的研制过程中,发现毛坯零件扩散焊后高度超差太多,具体表现为零件中的电工纯铁材料发生了严重的镦粗变形导致无法使用。研究发现,电工纯铁的材料成分纯度差异是造成该问题的根本原因。在相同的扩散焊参数下,电工纯铁纯度越高,材料在扩散焊过程中表现出的刚性越差,变形也越厉害。通过添加BNi82CrSiBFe中间层并优化工艺参数,在保证焊后毛坯零件变形率的基础上,大幅提升了扩散焊缝的抗拉强度,达到320 MPa以上,满足了产品的使用要求。The coil skeleton parts(electrical pure iron+stainless steel)welded by diffusion welding have the advantages of flat weld interface,high dimensional accuracy and excellent welding quality,it is widely used in hydraulic steering gear products.During the development of a new coil skeleton product,it was found that the height of the blank parts after diffusion welding was too much out of tolerance,the electrical pure iron material in the parts had a serious upsetting deformation and could not be used.According to the research,the difference in the purity of electrical pure iron is the root cause of the problem.Under the same diffusion welding parameters,the higher the purity of electrical pure iron,the worse the rigidity of the material in the diffusion welding process,and the more severe the deformation.By adding BNi82CrSiBFe intermediate layer and optimizing the process parameters,the tensile strength of diffusion weld has been greatly improved on the basis of ensuring the deformation rate of the blank parts after welding,and it reaches more than 320 MPa,which meets the use requirements of the product.

关 键 词：电工纯铁 骨架 扩散焊 变形 

分 类 号：TG439.6[金属学及工艺—焊接] TG453.9