| 摘要 |
The invention relates to the field of welding, in particular to a method for diffusion bonding of metallic parts through the layer. A method includes the preliminary cleaning, mechanical grinding and polishing of welding surface of the parts, generation between the bond surfaces of layer from a composite material, which consists of metallic layers of clean heterogeneous components or alloys on their basis, joining parts into the matching, pressing, heating and holding in vacuum at the set temperature during the set time. Layers of the composite material, which alternate, create from components and/or alloys on their basis, which as a result of diffusive interfusion of components which enter in the composition of layers, forming an eutectic alloy, the temperature of melting of which is below the temperatures of melting of material of bond parts no less than by , at that separate layers create are formed of the thick of 10-100 nm, and the process of heating of the bonding region of the parts is carried out to the temperature which is not less than by below than the temperature of eutectic alloy melting. A layer can be formed in the form of coating or foil by successive deposition or and condensation in the vacuum of the layers which alternate, on the contacting surfaces of one or both bond parts. The invention provides intensification of diffusive processes between metallic parts in a layer and their impervious joint. |
