TC4表面真空钎焊c-BN耐磨层的研究  

Research of c-BN Wear-resistant Layer on TC4 Surface by Vacuum Brazing

作　　者：高凯[1] 巨建辉[1,2] 马光[2] 操齐高[2] 李进[2] GAO Kai JU Jianhui MA Guang CAO Qigao LI Jin(School of Metallurgical Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055, China Northwest Institute For Non-ferrous Metal Research, Xi＇an 710016, China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西北有色金属研究院,陕西西安710016

出　　处：《热加工工艺》2016年第19期31-33,37,共4页Hot Working Technology

基　　金：陕西省自然科学基础研究计划-面上项目(2015JM5200)

摘　　要：采用AgCuInTi钎料在TC4表面真空钎焊c-BN耐磨层。研究了c-BN与AgCuInTi不同体积比的混合料与TC4钎焊后耐磨层的耐磨性,并对AgCuInTi钎料与c-BN的焊接性及界面微观结构进行了分析。结果表明:c-BN体积分数在50%左右时,钎焊工艺性较好,耐磨强度较高。AgCuInTi钎料对c-BN有较好的润湿性,两者界面结合紧密,并在界面处形成反应层。AgCuInTi钎料中的Ti元素向c-BN颗粒表面富集并与c-BN颗粒表面B和N元素发生反应,形成Ti B2和Ti N,实现了AgCuInTi钎料与c-BN颗粒的化学冶金结合。AgCuInTi filler was utilized to braze c-BN wear-resistant layer on TC4 surface by vacuum brazing. The wear resistance of the layers with different percentages of c-BN and AgCuinTi was studied. The weldability and microstructure of AgCuInTi active filler to braze c-BN were analyzed. The experimental results indicate that the brazability and the abrasion resistance are better when the percentage of the c-BN is 50%. AgCulnTi active filler exhibits a good wettability to brazing c-BN, the joint between filler and c-BN is compact, and a reaction layer is formed between them. During brazing, Ti element in AgCulnTi alloy transfers to the surface of the c-BN, and bonding behavior on c-BN surface by AgCulnTi alloy filler is realized through TiN and TiB2 which are produced by interaction between Ti element of AgCuinTi alloy and N or B elements ofc-BN surface. Thus, the chemical metallurgic bonding has been formed in the interface between AgCulnTi alloy and c-BN.

关 键 词：AgCuInTi C-BN TC4 真空钎焊 耐磨层 

分 类 号：TG454[金属学及工艺—焊接]