COMPOSITE BONDING MATERIAL OF BERYLLIUM, COPPER ALLOY AND STAINLESS STEEL AND COMPOSITE BONDING METHOD

摘要

PROBLEM TO BE SOLVED: To effectively join three of beryllium, copper alloy and stainless steel, without the sensitization problem of stainless steel, by using stainless steel as the base material and laminating copper alloy first and then beryllium on top of it, through one diffusion welding process. ;SOLUTION: An X-ray transmission window is joined with a stainless steel 3 as a structure and with a copper alloy 2 as a heat sink material. As a method of simultaneously joining the three, i.e., stainless steel 3, copper alloy 2 and beryllium 1, what is called glass coating HIP is adapted advantageously. in which the entire joining body is covered with glass powder 4 and then heated/ pressurized. In this case, between the beryllium 1 and the copper alloy 2, an insert material is interposed such as niobium which brings solid phase minimum temperature 870° or above for each alloy system, with the three simultaneously joined by one diffusion welding process under the conditions in which temperature is not less than 850°C but less than solidus line minimum temperature and in which pressure is 20-300MPa.;COPYRIGHT: (C)1998,JPO