NITRIDING METHOD FOR STEEL MEMBER
    6.
    发明公开

    公开(公告)号:EP4296383A1

    公开(公告)日:2023-12-27

    申请号:EP22756196.6

    申请日:2022-02-16

    发明人: HIRAOKA, Yasushi

    摘要: The invention is a nitriding treatment method for a steel component including at least two nitriding treatment steps, i.e., a first nitriding treatment step in which a nitriding treatment is performed to a steel component under a nitriding gas atmosphere of a first nitriding potential, and a second nitriding treatment step in which another nitriding treatment is performed to the steel component under another nitriding gas atmosphere of a second nitriding potential lower than the first nitriding potential, after the first nitriding treatment step. The first nitriding treatment step and the second nitriding treatment step is performed at a temperature within a range of 500 °C to 590 °C. The first nitriding potential is a value within a range of 0.300 to 10.000. The second nitriding potential is a value within a range of 0.253 to 0.600.