Conclusions
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1.
The hardness of dies after heat treatment does not determine the susceptibility to brittle fracture. The check on the tempering process in terms of hardness, as is done at present, is incomplete.
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2.
The strength of dies manufactured from high-alloy steels and quenched from low temperatures can be increased by aging.
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3.
If die steels are subjected to quenching from standard temperatures then tempering should be conducted at the highest temperatures at which the first-order stresses do not reduce the overall strength of the die.
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Physicotechnical Institute of the Academy of Sciences of the Belorussian SSR. Translated from Metallovedenie i Termicheksaya Obrabotka Metallov, No. 1, pp. 72–73, January, 1972.
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Dovnar, S.A., Butkevich, N.N. Effect of double tempering on work of fracture of die steels. Met Sci Heat Treat 14, 83–85 (1972). https://doi.org/10.1007/BF00658360
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DOI: https://doi.org/10.1007/BF00658360