Ni-BASED ALLOY PRODUCTION METHOD

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PROBLEM TO BE SOLVED : To provide an Ni-based alloy production method for uniformly forming a chromium oxide. SOLUTION : The method Ni-based alloy production method is characterized in that an Ni-based alloy is heated in a heating treatment atmosphere composed of carbon dioxide or in a heating treatment atmosphere composed of carbon dioxide in an amount of ≥0.0001 Vol.% and at least one kind selected from hydrogen gas in an amount of ≤99.9999 Vol.% and rare gas in an amount of ≤99.9999 Vol.%, and an oxide film composed of a chromium oxide is formed on the surface of the Ni-based alloy. In the heating, the heating treatment atmosphere may includes oxygen gas in an amount of ≤5 Vol.%, and is desirably composed of carbon dioxide and hydrogen gas in particular. COPYRIGHT : (C)2006, JPO&NCIPI