Effect of cooling rate after high temperature nitriding on transformation microstructure in low carbon steel

Kuniaki Tsukiyama, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki, Yo Tomota

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    4 Citations (Scopus)

    Abstract

    High temperature nitriding was applied to a low carbon steel, and then the transformation microstructure formed from the high nitrogen austenite was observed. The microstructure was greatly influenced by cooling rate after the nitriding. The austenite transformed to martensite when the cooling rate was fast (water-cooling) though a certain amount of austenite was retained in the martensite. On the other hand, a diffusional transformation product such as (ferrite + Fe4N) eutectoid structure was formed when the cooling rate was slow (gas- or furnace-cooling). The hardness profile obtained in these specimen were related with microstructure depending on the nitrogen concentration profile and cooling rate.

    Original languageEnglish
    Title of host publicationTHERMEC 2013 Supplement
    PublisherTrans Tech Publications
    Pages773-778
    Number of pages6
    ISBN (Print)9783038350743
    DOIs
    Publication statusPublished - 2014
    Event8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013 - Las Vegas, NV, United States
    Duration: Dec 2 2013Dec 6 2013

    Publication series

    NameAdvanced Materials Research
    Volume922
    ISSN (Print)1022-6680

    Other

    Other8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013
    Country/TerritoryUnited States
    CityLas Vegas, NV
    Period12/2/1312/6/13

    All Science Journal Classification (ASJC) codes

    • General Engineering

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