Metal Science and Heat Treatment

, Volume 22, Issue 3, pp 192–194 | Cite as

Effect of postdeformation tempering on the microhardness of martensite in hydrostatically extruded steel 9KhS

  • G. É. Brainin
  • A. A. Dobrikov
  • E. I. Osyka
Tool Steels
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Conclusions

  1. 1.

    Hydrostatic extrusion of tool steel 9KhS increases the microhardness of martensite, which is highest after tempering at 500°C.

     
  2. 2.

    The main structural changes occurring in hydrostatically extruded steel 9KhS in the process of tempering at 500°C and favoring retention of high dislocation density during subsequent heating to austenitizing temperature are polygonization and pinning of dislocations by precipitates. Higher tempering temperatures induce recrystallization and thus reduce the effect from hydrostatic extrusion.

     

Keywords

Martensite Recrystallization Structural Change Dislocation Density Tool Steel 

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Literature cited

  1. 1.
    V. Z. Spuskanyuk, Yu. F. Chernyi, and A. A. Lyadskaya, "Structure and properties of high-speed steels in hydrostatically extruded bars," in: First All-Union Conference on Physics and Technology of High Pressures [in Russian], Donetsk (1973), p. 64.Google Scholar
  2. 2.
    V. S. Koviko and B. M. Orekhov, in: First Republican Scientific Seminar on the Effect of High Pressures on Substances [in Russian], Inst. Probl. Mater. Akad. Nauk Ukr. SSR, Kiev (1976), p. 108.Google Scholar
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    L. S. Davydova, Yu. N. Petrov, and B. I. Beresnev, "Effect of hydrostatic extrusion on the structure and properties of Armco iron and steel U8," Fiz. Met. Metalloved.,43, No. 2, 412 (1977).Google Scholar
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    M. L. Bernshtein, Thermomechanical Treatment of Metals and Alloys [in Russian], Metallurgiya, Moscow (1968).Google Scholar
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    O. I. Datsko et al., in: First All-Union Conference on Physics and Technology of High Pressures [in Russian], Donetsk (1973), p. 177.Google Scholar

Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • G. É. Brainin
  • A. A. Dobrikov
  • E. I. Osyka

There are no affiliations available

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