Abstract
1. A decrease in cooling rate in the austenitic region during the quenching of steel R6M5, which results in the segregation of carbides from the supersaturated austenite, lowers its red hardness markedly and, consequently, exerts a negative influence on the cutting properties. 2. The method of quenching, which makes it possible to accelerate cooling in the austenite region on attaining the cooling rate in the interval of the martensitic transformation and which eliminates the formation of cracks in the high-speed steel, is promising.
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