扩散处理对K403铸造高温合金大间隙钎焊接头组织和力学性能的影响  

Effect of Diffusion Treatment on Microstructures and Mechanical Properties of Wide-Gap Brazed Joints of Cast Superalloy K403

作　　者：李大斌[1] 梁海[2] 孙计生[2] 潘晖[2] 刘效方[2] 

机构地区：[1]中国人民解放军第四七二三工厂,河北永年057150 [2]北京航空材料研究院,北京100095

出　　处：《航空材料学报》2006年第3期107-110,共4页Journal of Aeronautical Materials

摘　　要：研究采用自制钎料加入FGH95高温合金粉末的K403铸造高温合金大间隙钎焊后扩散处理参数对接头组织和持久性能的影响。结果表明,钎焊后进行温度1180℃,32h的扩散处理,钎缝化学成分及组织均匀,钎缝基体组织为γ固溶体,占体积50%~53%的γ′相均匀分布。骨架状硼化物化合物消除,少量小块和粒状碳化物和硼化物分布在晶界上。钎焊接头975℃的持久强度较高。The effect of diffusion treatment parameters on microstructures and stress-rupture properties of wide-gap brazed joints of cast superalloy K403 using self-developed brazing filler metal with FGH95 filler powder addition into the gap was studied.The results showed that after post-braze diffusion treatment at 1180℃ for 32h,the chemical composition and microstructure of the brazing seam were uniform,and the matrix of the brazing seam structure consisted of γ solid solution with γ′ phases of 50～53 volume percen...

关 键 词：组织 性能 扩散处理 大间隙钎焊 铸造高温合金 

分 类 号：TG407[金属学及工艺—焊接]