Importance

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Abstract

A clad product having predetermined closely-toleranced shape and dimensions. The product is made by first preforming a base material and a cladding of dissimilar material in dimensions substantially the same as the clad product, with at least the base or cladding being preformed with an additional dimensional profile. At least the cladding material is then heated to a solid-phase bonding temperature, achieved in one embodiment by laser-heating. The base material and cladding material are subsequently passed together through pressure rollers with application of a pressure for solid-phase bonding the cladding material against the base material to form the clad product. The bonding pressure of the rollers deforms the preformed additional dimensional profile to compensate for non-uniform material flow in the respective base or cladding material during solid-phase bonding for obtaining the predetermined closely-toleranced shape and dimensions of the clad product. For making a circular rod clad product of closely-toleranced concentricity, at least the core or cladding material is shaped to compensate for deformation during subsequent pressure rolling. Where the core material is so shaped, it is formed in a transverse oval cross-section, and where the cladding material is so shaped, it is comprised of a plurality of transverse crowns formed on one or more cladding strips.

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First Claim