PRODUCTION METHOD OF FERRITIC STAINLESS STEEL PRODUCT

PROBLEM TO BE SOLVED: To provide a production method of a ferritic stainless steel product excellent in corrosion resistance, and having high hardness.SOLUTION: A ferritic stainless steel product 1 is produced by performing at least a carburizing step and a nitriding step. In the carburizing step, a...

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1. Verfasser:	KITA TAKUYA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a production method of a ferritic stainless steel product excellent in corrosion resistance, and having high hardness.SOLUTION: A ferritic stainless steel product 1 is produced by performing at least a carburizing step and a nitriding step. In the carburizing step, a carburized layer 21 is formed on an object 2 to be processed made of a ferritic stainless steel. In the nitriding step, a nitrided layer 3 is formed on the surface of the object 2 to be processed by heating the object 2 to be processed at a temperature higher than a transformation point of the ferritic stainless steel in the atmosphere containing Ngas, after the carburizing step.SELECTED DRAWING: Figure 1 【課題】耐食性に優れると共に、硬度の高いフェライト系ステンレス鋼製品の製造方法を提供すること。【解決手段】少なくとも浸炭工程と窒化工程と行うことによりフェライト系ステンレス鋼製品１を製造する。浸炭工程においては、フェライト系ステンレス鋼製の被処理品２に浸炭層２１を形成する。窒化工程においては、浸炭工程後に、Ｎ2ガスを含む雰囲気中でフェライト系ステンレス鋼の変態点以上の温度で被処理品２を加熱することにより被処理品２の表面に窒化層３を形成する。【選択図】図１