Nitrided steel member and manufacturing method thereof

摘要

The present invention provides a nitrided steel member and manufacturing method thereof. the nitrided steel member including: an iron nitride compound layer formed on a surface of a steel member made of carbon steel for machine structural use or alloy steel for machine structural use, in which with regard to X-ray diffraction peak intensity IFe4N (111) of the (111) crystal plane of Fe4N and X-ray diffraction peak intensity IFe3N (111) of the (111) crystal plane of Fe3N obtained by measuring a surface of the nitrided steel member by X-ray diffraction, an intensity ratio represented by IFe4N(111)/{IFe4N (111)+IFe3N (111)} is 0.5 or more, and a thickness of the iron nitride compound layer is 2 to 17 μm.

主权项

1. A nitrided steel member comprising:
an iron nitride compound layer including a γ′ phase as a main component and an ε phase and formed on a surface of a steel member made of carbon steel for machine structural use or alloy steel for machine structural use, wherein with regard to X-ray diffraction peak intensity IFe4N (111) of the (111) crystal plane of Fe4N and X-ray diffraction peak intensity IFe3N (111) of the (111) crystal plane of Fe3N obtained by measuring a surface of the nitrided steel member by X-ray diffraction, an intensity ratio represented by IFe4N (111)/{IFe4N (111)+IFe3N (111)} is 0.5 or more, and a thickness of the iron nitride compound layer is 2 to 17 μm.