Study on Vacuum Brazing of 25Cr3MoA/YG6 Using Cu-based Microcrystalline Brazing Alloy
QiuYa Zhai;Cunkun Liang;Junping LIU;Qunsheng XUE
西安理工大学材料学院
Cite this article:
QiuYa Zhai; Cunkun Liang; Junping LIU; Qunsheng XUE. Study on Vacuum Brazing of 25Cr3MoA/YG6 Using Cu-based Microcrystalline Brazing Alloy. Acta Metall Sin, 2008, 44(9): 1136-1140 .
Abstract The vacuum brazing of cemented carbide YG6 and 25Cr3MoA steel was conducted by using a Cu-11%Sn-2%Ni microcrystalline brazing alloy. The microstructure of joint, behavior of atom mutual diffusion and distributions of alloy elements within the joint were analysed. The shearing strength of joints was tested using a special tester. The experimental results show that the Cu-based microcrystalline braze performs an excellent wettability and spreadability during vacuum brazing of 25Cr3MoA/YG6, and the brazing seam obtained is permeated soundly, thus the joint has a higher welding-on rate; the microstructure of brazing seam consists mainly of Cu-rich Cu13.7Sn phase and Ni-rich Cu9NiSn3 phase distributing within the Cu-rich phase. The diffusion range of Cu atoms from brazing seam to base metals reaches to 2.5μm. Therefore, the diffusion brazing of 25Cr3MoA and YG6 has be realized and the shearing strength of joint is high up to 169MPa.
[1]Kang S J,Chen X G,Lii Z Y,Yang L J.Trans Chin Weld Inst,2005;26(2):77 (亢世江，陈学广，吕志勇，杨立军．焊接学报，2005；26(2)：77) [2]Zhou X,Wang Y,Zhou J Y,Qu G H,Bao Z Y.Acta Metall Sin,2007;43:433 (周霞，王越，周继扬，曲国辉，鲍志勇．金属学报，2007；43：433) [3]Kuang T C,Bai X J,Cheng X L,Xue X M,Liu Z Y,Qiu W Q.Acta Metall Sin,1999;35:643 (匡同春，白晓军，成晓玲，薛新民，刘正义，邱万奇．金属学报，1999；35：643) [4]Gimenez S,Huang S G.Appl Surf Sci,2007;253:3547 [5]Xu P Q,Yang D X,Zhao X J,Lu F G,Yao S.J Shanghai Jiaotong Univ,2005;39:1050 (徐培全，杨德新，赵秀娟，芦凤桂，姚舜．上海交通大学学报，2005；39：1050) [6]Nowacki J,Kawiak M.Mater Process Technol,2004;157: 584 [7]Basu S N,Sarin V K.Mater Sci Eng,1996;A209:206 [8]Xu C,Sun F L,Qin Y Q,Meng G G.Trans Chin Weld Inst,2003;24(2):47 (徐超，孙凤莲，秦优琼，孟工戈．焊接学报，2003；24(2)：47) [9]Zhai Q Y,Yang Y,Xun J F,Guo X F.Chin J Non]errous Met Soc,2006;16:1374 (翟秋亚，杨扬，徐锦锋，郭学锋．中国有色金属学报，2006；16：1374) [10]Llamazares J L S,Sanchez T,Santos J D,Perez M J, Sanchez M L,Hernando B,Escoda L,Sunol J J,Varga R. Appl Phys Left,2008;92:012513 [11]Zou J S,Xu Z R,Chu Y J,Chen G.Mater Rev,2004;18: 17 (邹家生，许志荣，初雅杰，陈光．材料导报，2004；18(4)：17) [12]Huang J H.Di~usions Within Metals and Alloys.Beijing: Metallurgical Industry Press,1996:29 (黄继华．金属及合金中的扩散．北京：冶金工业出版社，1996：29)
