Influence of Heat Treatment of High-Speed Steel on its Microstructure, Hardness and Fracture Toughness

Abstract:

The correlation between fracture toughness, hardness and microstructure of vacuum heat-treated high-speed steel AISI M2 was investigated. Our intention was to investigate the influence of microstructural parameters such as the volume fraction of undissolved eutectic carbides, their mean diameter, the mean distance between the carbides, as well as the volume fraction of retained austenite in the matrix, on the above mentioned mechanical and fracture properties. The experimental investigations were performed on the high-speed steel. This steel had the following chemical composition (mass content in %): 0.89% C, 0.20% Si, 0.26% Mn, 0.027% P, 0.001% S, 3.91% Cr, 4.74% Mo, 1.74% V and 6.10% W.

• Periodical: Key Engineering Materials (Volumes 592-593)
• Pages: 680-683
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.592-593.680
• Online since: November 2013
• Authors: Franjo Cajner, Vojteh Leskovšek, Dragan Pustaić
• Keywords: Correlation between Hardness and Fracture Toughness, High-Speed Steel, Microstructure, Vacuum Heat Treatment, Volume Fraction of Retained Austenite, Volume Fraction of Undissolved Eutectic Carbides

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