EFFECT OF LOW TEMPERATURE TEMPERING CONDITIONS ON STRENGTH AND TOUGHNESS OF HARDENED HIGH CARBON STEELS

The effect of low temperature tempering conditions on strength, yield stress, plasticity and toughness of hardened carbon steels and low alloy steels was investigated in relation to microstructural changes. From the viewpoint of hardness as well as strength and toughness of most hardened high carbon steels, it is ascertained that optimum tempering temperature range is from 180 deg C to 200 deg C, and optimum tempering time range is from 10 hr to 15 hr at 180 deg C or from 2 hr to 3 hr at 200 deg C. And when this condition is exceeded, so-called low temperature tempering embrittlement may be caused, which is supposed to be in a close relationship with microstructural changes such as decomposition of austenite to bainite or precipitation of cementite. Besides, it is also ascertained that martempering markedly improves strength and toughness of hardened high carbon steels.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3127232
• Corporate Authors:

  Ken-yusha, Incorporated

  1-45-6 Hikari-cho, Kokubunji-shi
  Tokyo,   Japan 
• Authors:
  • Iijima, K
• Publication Date: 1974

Media Info

• Pagination: p. 111-117
• Serial:
  • Railway Technical Research Institute, Quarterly Reports
  • Volume: 15
  • Issue Number: 2
  • Publisher: Railway Technical Research Institute/Tetsudo Gijutsu Kenkyujo
  • ISSN: 0033-9008
  • Serial URL: http://www.rtri.or.jp/eng/

Subject/Index Terms

• TRT Terms: High strength steel; Low temperature; Metallurgy; Steel
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00057863
• Record Type: Publication
• Source Agency: Railway Technical Research Institute
• Report/Paper Numbers: Quart. Rpt
• Files: TRIS
• Created Date: Nov 12 1974 12:00AM