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A method of joining together component parts of a solid, preferably metallic, material into a composite element by hot isostatic pressing involves forming the parts so that good contact is obtained between surfaces at a joint where the surfaces are to be joined together. The joint is covered by a la

A method of joining together component parts of a solid, preferably metallic, material into a composite element by hot isostatic pressing involves forming the parts so that good contact is obtained between surfaces at a joint where the surfaces are to be joined together. The joint is covered by a layer of a powder or a mixture of powder with substantially the same composition as the material in the different component parts. This powder layer is covered by one or more layers of glass powder, which upon heating forms a gas-impermeable layer. Between the powder layer covering the joint and a glass powder layer nearest to said layer there may be applied an intermediate layer of a powder having a melting point which is above the temperature to be used for the isostatic pressing. The assembly of parts and layers is pressed isostatically in a known manner at such a temperature that diffusion bonding is achieved at the contact surfaces.

대표청구항 ▼

A method of joining together component parts of a composite element by hot isostatic pressing (HIP), which is characterised in that the component parts are assembled so that surfaces thereof to be joined together are in contact at at least one joint, in that a first layer of powder having substantia

A method of joining together component parts of a composite element by hot isostatic pressing (HIP), which is characterised in that the component parts are assembled so that surfaces thereof to be joined together are in contact at at least one joint, in that a first layer of powder having substantially the same composition as the material of at least one of said component parts is applied over the said at least one joint, in that a second layer of a glass powder is applied over the first powder layer in that the assembled component parts and layers are heated so that the second layer of glass powder forms a gas-impermeable barrier over the first layer, and in that the component parts and layers are subjected to an all-sided gas pressure at such an elevated temperature that diffusion bonding occurs at the said at least one joint between the component parts.