Conclusions
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1.
Changes in the crystal structure leading to an increase of hardness occur in the surface layers of steel KhVG under the influence of dynamic and static interactions with polyethylene.
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2.
The heat treatment of forming equipment used in manufacturing polyethylene parts should not produce the maximum hardness, since it leads to premature embrittlement and failure of the working surfaces.
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3.
To obtain forming equipment with a long service life it is necessary to create a permanent barrier to prevent contact of polyethylene with the surface of the metal.
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Literature cited
A. A. Berlin and V. E. Basin, Fundamentals of Adhesion of Polymers [in Russian], Khimiya, Moscow (1974), p. 297.
G. A. Gorokhovskii, Surface Dispersion of Dynamically Contacting Polymers and Metals [in Russian], Naukova Dumka, Kiev (1972), p. 132.
V. A. Belyi, N. I. Egorenkov, and Yu. M. Pleskachevskii, Adhesion of Polymers to Metals [in Russian], Nauka i Tekhnika, Minsk (1977), p. 202.
E. Bernhardt, Forming of Thermoplastic Materials [Russian translation], Mir, Moscow (1960), p. 23.
E. N. Demin, Design of Die-Casting Molds for Plastics [in Russian], Leningrad (1960), p. 87.
Additional information
Kurgansk Machine Construction Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No 12, p. 50, December, 1979.
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Yanko, V.M., Sivkov, S.I. Effect of forming conditions on polyethylene-forming equipment made of steel KhVG. Met Sci Heat Treat 21, 954–955 (1979). https://doi.org/10.1007/BF00706639
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DOI: https://doi.org/10.1007/BF00706639