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Strengthening Thermo-Cycling Heat Treatment Process of High-Speed Steels

[+] Author Affiliations
Alexander A. Shmatov

Belarussian National Technical University, Minsk, Belarus

Paper No. ESDA2006-95093, pp. 347-352; 6 pages
doi:10.1115/ESDA2006-95093
From:
  • ASME 8th Biennial Conference on Engineering Systems Design and Analysis
  • Volume 1: Advanced Energy Systems, Advanced Materials, Aerospace, Automation and Robotics, Noise Control and Acoustics, and Systems Engineering
  • Torino, Italy, July 4–7, 2006
  • ISBN: 0-7918-4248-7 | eISBN: 0-7918-3779-3
  • Copyright © 2006 by ASME

abstract

The results of the examination of structure and properties of high-speed steels S 6-5-2, P6M5 (6% W, 5% Mo), P18 (18% W), P6M5K5 (6% W, 5% Mo, 5% Co) subjected to a specific strengthening thermo-cycling heat treatment are presented. The newly developed process results in a fine-grained heterogeneous microstructure (primary and secondary carbides, martensite and residual austenite) with spatially uniform distribution of the carbide grains. This brings about a 10–20% increase in the bending strength with the impact strength increased by the factor of 1.5–2.5, improves surface hardness by HRC 1–3 and the wear resistance of tools by the factor of above 2 as compared with standard heat treatments.

Copyright © 2006 by ASME

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