Conclusions
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1.
Die-casting molds for copper-base alloys are put out of commission by cracks formed at the beginning of the process and developing mainly due to oxidation of the steel.
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2.
Failure of die-casting molds for casting aluminum-base alloys is due to low-cycle fatigue of the steel under the influence of thermal stress. Oxidation is not a major factor in the development of cracks in this case.
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3.
Alloying to increase the service life of die-casting molds for copper-base alloys should be directed toward increasing the scale resistance, and toward increasing the heat resistance for casting aluminum-base alloy.
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Literature cited
V. M. Vladimirov, Preparation of Dies, Die-Casting Molds, and Equipment [in Russian], Vysshaya Shkola, Moscow. (1974), p. 371.
Jacques Benard (editor), Oxidation of Metals [Russian translation], Vol. 2, Metallurgiya, Moscow (1969), p. 261.
H. Parkus, Irregular Thermal Stresses [in Russian], Izd. FML, Moscow (1968), p. 186.
W. Rostoker et al., Embrittlement Under the Influence of Liquid Metals [Russian translation], IL, Moscow (1962), p. 46.
Additional information
Moscow Automobile Factory. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 51–53, September, 1980.
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Kovrigin, V.A., Starokozhev, B.S. & Yurasov, S.A. Effect of oxidizing processes on crazing of die-casting molds. Met Sci Heat Treat 22, 688–690 (1980). https://doi.org/10.1007/BF00700700
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DOI: https://doi.org/10.1007/BF00700700