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Change in carbide heterogeneity during hot extrusion of cutting tools for high-speed steels

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Conclusions

  1. 1.

    The larger the deformation and the higher the grade of the carbide heterogeneity of the original blank, the larger the change in the carbide heterogeneity during hot extrusion of tools made of high-speed steels.

  2. 2.

    Along the length and section of extruded tools the carbide heterogeneity changes in relation to the local deformation, which in turn depends on the total deformation, the shape of the tool, and other factors.

  3. 3.

    The largest changes in carbide heterogeneity are observed after hot extrusion of cast blanks and also blanks with a high original CH (larger than 5).

  4. 4.

    During hot extrusion of steel R18 in the range of deformations tested the size of the carbides remains basically unchanged, although large carbides (">15–20 μ) are broken up in sections with high local deformation.

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Literature Cited

  1. Yu. A. Geller, Tool Steels [in Russian], Metallurgiya, Moscow (1975), p. 161.

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  2. V. P. Severdenko, V. S. Muras, and É. Sh. Sukhodrev, Hot Hydrodynamic Extrusion of Cutting Tools [in Russian], Nauka, Moscow (1976).

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  3. V. P. Severdenko et al., "Effect of hot hydrodynamic extrusion in HTMT on the properties of complex-alloy high-speed steels," Kuznechno-Shtampovochnoe Proizvod., No. 6, 7 (1974).

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  4. O. A. Samokhvalova and A. P. Myskova, "Metallographic analysis of high-speed steels after hot hydrodynamic extrusion," in: Reports of the Scientific — Technical Conference on the Use of Hot Hydrodynamic Extrusion for Manufacturing Cutting Tools [in Russian], NTo Mashprom, Kuibyshiev (1976), p. 21.

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  5. S. I. Gubkin, Theory of Treating Metals Under Pressure [in Russian], Metallurgizdat, Moscow (1947), p. 293.

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Authors
  1. É. O. Maizel's
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  2. V. G. Kantin
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  3. I. K. Danil'chik
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Additional information

Physicotechnical Institute, Academy of Sciences of the Belorussian SSR. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 49–52, September, 1978.

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Maizel's, É.O., Kantin, V.G. & Danil'chik, I.K. Change in carbide heterogeneity during hot extrusion of cutting tools for high-speed steels. Met Sci Heat Treat 20, 742–746 (1978). https://doi.org/10.1007/BF00703756

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  • DOI: https://doi.org/10.1007/BF00703756

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