A method of producing a ni based alloy

Details A method of producing a ni based alloy A method of producing a ni based alloy

C - Chemistry, Metallurgy

22

F

C22F 1/10 (2006.01) C22C 19/05 (2006.01) C22F 1/02 (2006.01)

Patent

CA 2520700

A Ni-based alloy is subjected to a heat treatment in an atmosphere consisting of carbon dioxide gas or the atmosphere consisting of 0.0001 vol.% or more carbon dioxide gas and 99.9999 vol.% or less non-oxidizing gas in order to form an oxide film composed of chromium oxide on the surface of the alloy. The atmosphere is desirable to contain 5 vol.% or less oxygen gas. Especially, the atmosphere is desirable to consist of carbon dioxide gas and hydrogen gas.

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