Effect of the Chemical Composition and Structure of EP682-Sh and R6M5 High-Speed Steels on Their Hardness and Impact Toughness,Russian Metallurgy (Metally)

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Effect of the Chemical Composition and Structure of EP682-Sh and R6M5 High-Speed Steels on Their Hardness and Impact Toughness
Russian Metallurgy (Metally) ( IF 0.4 ) Pub Date : 2022-04-27 , DOI: 10.1134/s0036029522040024
V. I. Antipov ₁ , L. V. Vinogradov ₁ , A. G. Kolmakov ₁ , I. O. Bannykh ₁ , Yu. E. Mukhina ₁ , E. E. Baranov ₁

Affiliation

Abstract

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.

中文翻译：

EP682-Sh和R6M5高速钢的化学成分和结构对其硬度和冲击韧性的影响

摘要

研究了高速钢EP682-Sh（R12FZK10M3-Sh）和R6M5的硬度和冲击韧性，提出了提高其硬度的方法。确定了碳钒含量的最佳比例（C/V = 0.42）；在此比例下，EP682-Sh 钢在 520°C 回火 1 小时后执行 6 次后的硬度为 71-72 HRC。经径向剪切轧制后，高速钢是一种沉淀硬化复合材料，碳化物颗粒分布均匀，提高了冲击韧性，降低了轧制开裂的风险。

更新日期：2022-04-28

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