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

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

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

3 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 - Jan 1 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
CountryUnited States
CityLas Vegas, NV
Period12/2/1312/6/13

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Tsukiyama, K., Nakada, N., Tsuchiyma, T., Takaki, S., & Tomota, Y. (2014). Effect of cooling rate after high temperature nitriding on transformation microstructure in low carbon steel. In THERMEC 2013 Supplement (pp. 773-778). (Advanced Materials Research; Vol. 922). Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/AMR.922.773