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65 years of the Department of "Technology of Metals and Materials Science" Tver State Technical University
ArticleName Increasing the red hardness of the deposited layer of high-speed steel by thermomechanical effects
DOI 10.17580/chm.2023.06.05
ArticleAuthor A. M. Dozhdelev, A. Yu. Lavrentyev

Tver State Technical University, Tver, Russia:

A. M. Dozhdelev, Cand. Eng., Associate Prof., Dept. of Technology of Metals and Materials Science, e-mail:
A. Yu. Lavrentyev, Cand. Eng., Associate Prof., Dept. of Technology of Metals and Materials Science, e-mail:


Currently, domestic enterprises are in dire need of high-quality Russian-made metal cutting tools. As a material for the working part of the cutting tool, you can use high-speed steel, which has a decent level of performance, allowing it to be successfully used in a variety of technological operations. It is advisable to manufacture such a tool by surfacing tool material, which makes it possible to reduce the consumption of expensive high-speed steel and at the same time form a working part of the required shape, which can be extremely important in the manufacture of shaped or stamping tools. The article considers the issue of increasing the red hardness of the deposited high-speed steel. The key factors influencing this property of the material are identified. As part of the study, samples of deposited high-speed steel R2M8 were analyzed. It is proposed to use surfacing with dual control of the process of electrode metal transfer in the arc, followed by surface plastic deformation (SPD) and high-temperature tempering. The use of double-controlled surfacing makes it possible to provide a high cooling rate of the deposited high-speed steel during hardening from the liquid phase in order to retain a larger amount of alloying elements in the solid solution, which contributes to an increase in the red hardness of the deposited high-speed steel. It was also found that accelerated cooling contributed to the formation of a high-speed steel structure with a large grain number. The subsequent SPD makes it possible to ensure the transformation of the residual austenite of the deposited high-speed steel into deformation martensite, to relax internal stresses caused by surfacing, and to reduce the subsequent heat treatment from three times to a single high-temperature tempering.

keywords Red hardness, heat resistance, high speed steel, hardfacing, tool, surface plastic deformation

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