Method of producing clad metal tubes.

摘要

A method of producing clad metal comprises the steps of forming a cladding on the surface of a metal substrate (1) by subjecting powder (2) of a metal which is of a different type from that of the metal substrate (1) and is selected from among Ni-base alloys, Co-base alloys, Ti-base alloys, Fe-base superalloys and stainless steels to hot isostatic pressing under a gas pressure load of not less than 300 kg/cm<2> at a temperature not higher than the solidus thereof, thereby to obtain a composite material, and elongating the composite material by hot working. Optionally the composite material is subjected to soaking or solution treatment before being subjected to hot working.