Microstructure and tensile properties of TRIP-aided steel sheet subjected to hot-rolling and austempering

Junya Kobayashi, Hiroto Sawayama, Naoya Kakefuda, Goroh Itoh, Shigeru Kuraoto, Tomohiko Hojo

研究成果: Conference contribution

抄録

Various high strength steel sheets for weight reduction and safety improvement of vehicles have been developed. TRIP-aided steel with transformation induced plasticity of the retained austenite has high strength and ductility. Conventional TRIP-aided steels are subjected to austempering process after austenitizing. Generally, elongation and formability of TRIP-aided steel are improved by finely dispersed retained austenite in BCC phase matrix. The finely dispersed retained austenite and grain refinement of TRIP-aided steel can be achieved by hot rolling with heat treatment. Therefore, the improvement of mechanical properties of TRIP-aided steel is expected from the manufacturing process with hot rolling and then isothermal transformation process. In this study, thermomechanical heat treatment is performed by combining hot rolling and isothermal holding as the manufacturing process of TRIP-aided steel sheets. The complex phase matrix is obtained by hot rolling and then isothermal holding. Although the hardness of the hot rolled and isothermal held TRIP-aided steel is decreased, the volume fraction of retained austenite is increased.

本文言語English
ホスト出版物のタイトルTHERMEC 2021 - International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications
編集者Mihail Ionescu, Christof Sommitsch, Cecilia Poletti, Ernst Kozeschnik, Tara Chandra
出版社Trans Tech Publications Ltd
ページ732-737
ページ数6
ISBN(印刷版)9783035736304
DOI
出版ステータスPublished - 2021
イベントInternational Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications, THERMEC 2021 - Vienna, Austria
継続期間: 2021 5 102021 5 14

出版物シリーズ

名前Materials Science Forum
1016 MSF
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Conference

ConferenceInternational Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications, THERMEC 2021
国/地域Austria
CityVienna
Period21/5/1021/5/14

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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