采用BNi68CrWB钎料钎焊GH783的接头组织与性能  

Microstructure and Property of the GH783 Joint Brazed with BNi68CrWB Filler Metal

作　　者：刘文慧[1] 郭绍庆[1] 叶雷[1] 毛唯[1] 周标[1] 

机构地区：[1]北京航空材料研究院焊接及锻压工艺研究室,北京100095

出　　处：《材料工程》2010年第6期73-77,83,共6页Journal of Materials Engineering

摘　　要：选用BNi68CrWB钎料,对低膨胀高温合金GH783的钎焊工艺及接头组织性能进行研究。研究表明,采取BNi68CrWB钎料、钎焊规范为1180℃/10min,钎焊试样焊后进行完全热处理,获得钎焊接头室温拉伸强度最高达到701MPa,接头650℃拉伸强度最高达到了696MPa;钎焊接头的组织由镍-钴基γ固溶体、共晶及其他脆性化合物相构成;钎焊间隙不同,接头中固溶体所占比例不同,0.05mm间隙中元素扩散较充分,接头以固溶体为主,共晶及其他脆性化合物相较少。钎焊间隙对接头性能影响较大,0.05mm钎焊间隙的接头强度明显高于0.1mm间隙接头。The vacuum brazing test of GH783 was carried out by using BNi68CrWB filler.Microstructure and property of the brazed GH783 joint were investigated.The tensile strength of the joint was quite high under the heating condition of 1180℃/10min.All of the brazed joints were subjected to heat treatment.The maximum joint tensile strength at room temperature reaches 701MPa,and at 650℃ the maximum joint tensile strength reaches 696MPa.Microstructure of the brazed joint consists of nickel-cobalt based γ solution,eutectic and other brittle phases.The ratio of the solution in the joint was different when the joint clearance was changed.Elements in the joint with 0.05mm joint clearance diffuse more adequately,resulting in a lower content of eutectic and other brittle phases and higher content of solution.The joint clearance has an influence on the joint strength.Compared with 0.1mm joint clearance,the tensile strength of the joint with 0.05mm joint clearance is remarkably higher.

关 键 词：镍基高温合金 GH783 钎焊 接头 力学性能 

分 类 号：TG454[金属学及工艺—焊接]