Method for nitriding-processing iron group series alloy substrate
AssigneeCemm Co., Ltd.
InventorsShigeaki Kanbe, Hironori Hukuta, Kousuke Katou
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Abstract
A processing method for nitriding an iron group series alloy substrate, or processing subject, containing an alloy element for forming nitride by plasma nitriding treatment including a passivated membrane removing treatment step. The passivated membrane removing treatment is performed by hydrogen sputtering under reduced pressure. It is desirable that this hydrogen sputtering is initiated from a normal temperature in a process of raising a temperature of a processing subject for plasma nitriding.
Claims10
A processing method for nitriding an iron group series alloy substrate, which comprises:
- subjecting said substrate to a plasma nitriding treatment after a passivated membrane is removed by a reduction action,
- wherein said passivated membrane removing treatment is performed by hydrogen sputtering in an atmosphere below about 350° C.
A processing method for nitriding an iron group series alloy substrate, which comprises:
- subjecting said substrate to a plasma nitriding treatment after a passivated membrane is removed by a reduction action,
- wherein a nitrided layer is at least initially formed by the plasma nitriding treatment in an temperature at 350 to 450° C., and said passivated membrane removing treatment is performed by hydrogen sputtering.
Dependencies are inferred from the claim text.