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 nickel-base cast superalloybrazingvacuum arc brazinglarge gap brazingvacuum electron beam brazing