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Abstract <p>Steels with controlled austenitic transformation during operation (CATO-type steels) are a new class of tool steels intended for operation at temperatures up to 800°C. In CATO-type steels, the effect of α →&#xa0;γ-transformation by heating of the deformed metal during tool heating is realized, providing the effect of austenite hardening from deformation forces. Steel EP930 is the first of the CATO-type steels, introduced into production, but its insufficiently high strength at test temperatures of 600–800°C necessitated the search for methods of hardening treatment. To obtain the maximum high-temperature strength of steel EP930, methods of hardening treatment are tested according to modes ensuring high tool resistance during pressing of difficult-to-deform copper alloys. Analysis shows that the method of hardening steel EP930 in the austenitic state under plastic deformation turned out to be the most promising.</p>

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Development of Hardening Treatment Methods of New Class EP930 Die Steel in Austenitic State

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • A. A. Kruglyakov

摘要

Abstract

Steels with controlled austenitic transformation during operation (CATO-type steels) are a new class of tool steels intended for operation at temperatures up to 800°C. In CATO-type steels, the effect of α → γ-transformation by heating of the deformed metal during tool heating is realized, providing the effect of austenite hardening from deformation forces. Steel EP930 is the first of the CATO-type steels, introduced into production, but its insufficiently high strength at test temperatures of 600–800°C necessitated the search for methods of hardening treatment. To obtain the maximum high-temperature strength of steel EP930, methods of hardening treatment are tested according to modes ensuring high tool resistance during pressing of difficult-to-deform copper alloys. Analysis shows that the method of hardening steel EP930 in the austenitic state under plastic deformation turned out to be the most promising.