PURPOSE: To form a joined part having the metallic texture and high temp. strength equivalent to those of a base material by interposing a layer of Zr or a Zr-Ni alloy in the joined part of a heat-resistant nickel alloy and pressurizing the joined part while heating the same in a specific temp. range.
CONSTITUTION: A layer of Zr or a Zr-Ni layer is interposed in the joined part of a heat-resistant nickel alloy. The compsn. of Ni in the alloy may be any compsn. as far as it is ≤20wt% in the case of using the Zr-Ni alloy. A pressure is applied to the base material, and the entire part of the material is heated and held in an inert atmosphere. The temp. is required to be higher than the melting point of the Zr-Ni alloy and lower than the m.p. of the heat resistant Ni alloy. The joined part is cooled to prevent oxidation upon ending of the diffusion of Zr, whereby the intended joined part is obtd.
TAKEDA HIROMITSU
YAMAZAKI TATSUO
