Effect of the Chemical Composition and Structure of EP682-Sh and R6M5 High-Speed Steels on Their Hardness and Impact Toughness

The hardness and impact toughness of high-speed steels EP682-Sh (R12FZK10M3-Sh) and R6M5 are studied, and methods for increasing their hardness are proposed. The optimum ratio of the carbon to vanadium content (C/V = 0.42) is determined; at this ratio, the hardness of the EP682-Sh steel of the modif...

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Bibliographic Details
Published inRussian metallurgy Metally Vol. 2022; no. 4; pp. 380 - 384
Main Authors Antipov, V. I., Vinogradov, L. V., Kolmakov, A. G., Bannykh, I. O., Mukhina, Yu. E., Baranov, E. E.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2022
Subjects
Applied Problems of Strength and Plasticity
Chemistry and Materials Science
Materials Science
Metallic Materials
hardness
heat treatment
radial-shear rolling
high-speed steel
impact toughness
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Summary:The hardness and impact toughness of high-speed steels EP682-Sh (R12FZK10M3-Sh) and R6M5 are studied, and methods for increasing their hardness are proposed. The optimum ratio of the carbon to vanadium content (C/V = 0.42) is determined; at this ratio, the hardness of the EP682-Sh steel of the modified composition after tempering at 520°C for 1 h performed six times is 71–72 HRC. After radial-shear rolling, high-speed steel is shown to be a precipitation-hardened composite material with uniformly distributed carbide particles, which increases the impact toughness and decreases the risk of cracking in rolling.
ISSN:0036-0295
1555-6255
DOI:10.1134/S0036029522040024