Brazing of casted K465 nickel-based superalloy and the related applications for repair

K465镍基铸造高温合金钎焊及其在修复中的应用 Brazing of casted K465 nickel-based superalloy and the related applications for repair 李思思 LI Sisi 1 first-author 静永娟 JING Yongjuan 1 程耀永 CHENG Yaoyong 1 裴冲 PEI Chong 1 毛唯 MAO Wei 1 中国航发北京航空材料研究院焊接与塑形成形研究所 中国航发北京航空材料研究院焊接与塑形成形研究所 Welding and Plastic Forming Research Institute,Beijing Institute of Aeronautical Materials Welding and Plastic Forming Research Institute,Beijing Institute of Aeronautical Materials 介绍了目前4种K465镍基铸造高温合金钎焊技术及其在修复中的应用。对于常规钎焊间隙,采用Co45NiCrWB、BNi82CrSiB、BNi57NbCoWCrAlSiMo和BNi73CrSiB-40Ni钎料皆适合钎焊K465高温合金,其中Co45NiCrWB钎料的钎焊接头性能最好;采用真空电弧钎焊方法和B-Ni65CoCrWBMoAlNb钎料,可实现K465合金与耐磨合金B-2合金的连接,钎焊缝连续、致密、无裂纹等未焊合缺陷,叶片组织未见晶粒长大现象;采用FGH95镍基合金粉为预填高熔点粉末的方法可实现0.5 mm大间隙的K465合金钎焊;真空电子束钎焊作为一种高质量、高效率、精确控制的制造技术,对各种精密、复杂部件连接制造具有非常重要的意义。 In this study,the brazing of casted K465 nickelbased superalloy with four different brazing methods and related brazing repair applications were introduced. For normal gap brazing,Co45NiCrWB,BNi82CrSiB,BNi57NbCoWCrAlSiMo and BNi73CrSiB-40Ni filler alloys were all suitable for the brazing of K465 superalloy,and the joint brazed with Co45NiCrWB filler alloy exhibited highest joint strength. The joining of K465 superalloy and B-2 wear-resistant alloy could be realized by vacuum arc brazing with B-Ni65CoCrWBMoAlNb filler alloy. Sound joints without cracks and coarse grains were obtained. Furthermore,the joining of K465 superalloy with the large brazing gap of 0.5 mm was studied by adding the mixed powders of FGH95 nickel-base alloy and brazing filler alloy. Additionally,due to its high quality, high efficiency and precise control characteristics,vacuum electron beam brazing technology could be widely applied in the joining of components with complex structures. K465镍基高温合金 钎焊 真空电弧钎焊 大间隙钎焊 真空电子束钎焊 K465 nickel-base cast superalloy brazing vacuum arc brazing large gap brazing vacuum electron beam brazing TG454 2022-03-08 11 50