| 摘要 |
PURPOSE:To suppress the rate of plastic deformation by the exposed clean joint surfaces and to join diffusively joining members consisting of Al (alloy) by putting said joining member and Mg powder isolated by a wire net for preventing scattering into a retort and sealing the inside thereof to a vacuum then heating the retort and reducing away an Al oxide film by the Mg vapor generated by said heating. CONSTITUTION:A joining materials 2a, 2a having an Al2O3 film 2b and Mg powder 2c isolated by a wire net 2d for preventing scattering are charged into a retort 1 installed in a heating furnace 2. The retort 1 is then subjected to electron beam welding alpha and at the same time the inside thereof is evacuated. The materials 2a, 2a are heated to a prescribed temp. by a heater 3 and the film 2b is reduced away by the evaporated Mg in the retort 1 to expose the clean joint surfaces and thereafter the materials are pressurized with a press 4. The materials are in succession pressurized and soaked to join diffusively the materials 2a, 2a, by which said materials are united to one body. The diffusion joining of the joining materials to each other is thus made possible without using an insert metal. |
