Microstructure and Tribological Properties of Tool Steel AISI O2 After Thorough Cryogenic Heat Treatment

KAYA E., KILIÇAY K., ULUTAN M.

METAL SCIENCE AND HEAT TREATMENT, vol.62, pp.399-404, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 62
  • Publication Date: 2020
  • Doi Number: 10.1007/s11041-020-00574-5
  • Journal Name: METAL SCIENCE AND HEAT TREATMENT
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.399-404
  • Keywords: steel AISI O2, microstructure, heat treatment, cryogenic treatment, wear resistance, WEAR-RESISTANCE, MECHANICAL-PROPERTIES
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

Steel AISI O2 (type 9G2) for a cold-working tool after different quenching, tempering, and cryogenic treatment regimes is studied. It is established that after cryogenic treatment the amount of residual austenite decreases by a factor of 4.3 compared with a quenched condition. The highest hardness 69HRCis achieved after quenching and cryogenic treatment, and in this case wear resistance is higher by a factor of 2.36 than after quenching and tempering. After cryogenic treatment there is also a reduction in friction coefficient.