Advertisement

Metal Science and Heat Treatment

, Volume 18, Issue 11, pp 930–932 | Cite as

Effect of hot deformation conditions and preliminary heat treatment on the properties of tungsten-molybdenum high-speed steels

  • A. N. Popandopulo
  • S. D. Popova
  • O. V. Kondrat'eva
Tool Steels and Alloys

Conclusions

  1. 1.

    The initial rolling temperature (1000\2-1200\dg) and preliminary heat treatment have a large effect on the consistency of the properties of tungsten-molybdenum steels.

    An initial rolling temperature of 1000° ensures consistent properties of all 20 heats investigated after annealing and tempering. Initial rolling temperatures of 1100–1200° increase the susceptibility of tungsten-molybdenum steels to grain growth during quenching.

    Steels rolled at 1000–1200° and not subjected to preliminary softening heat treatment have a tendency to grain growth, unevenness of grain size, and brittleness of the fracture (with rolling at 1200°).

     
  2. 2.

    Initial rolling temperatures from 1000 to 1200\dg have no essential effect on the red hardness after tempering and annealing. Among the heats tested, the red hardness of 30% tended to decrease when the initial rolling temperature was raised to 1200\dg after tempering and after annealing.

     

Keywords

Grain Size Heat Treatment Brittleness Deformation Condition Rolling Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. 1.
    V. D. Sadovskii, Structural Inheritance in Steel [in Russian], Metallurgiya, Moscow (1973), p. 208.Google Scholar
  2. 2.
    V. N. Lomakin, “The consistency of the properties of commercial heats of high-speed steel R6M5”, Metallorezhushchii i Kontrol'no-Izmeritel'nyi Instrument, No. 9, 7 (1972).Google Scholar
  3. 3.
    V. N. Lomakin, “Melting characteristics of high-speed steel R6M5”, Metallorezhuschii i Kontrol'no-Izmeritel'nyi Instrument, No. 9, 3 (1974).Google Scholar
  4. 4.
    A. M. Adaskin, P. A. Andzhyus and V. I. Buzelis, “Reasons for inconsistency of the properties of steel R6M5”, Stal', No. 7, 649 (1975).Google Scholar
  5. 5.
    Yu. A. Geller, Tool Steels [in Russian], Metallurgiya, Moscow (1975), p. 584.Google Scholar
  6. 6.
    E. I. Malinkina and M. N. Fadyushina, “Permissible grain size of high-speed steel”, Metalloved. Term. Obra. Met., No. 2, 55 (1966).Google Scholar
  7. 7.
    K. A. Malinina, “Recrystallization of austenite in high-speed steel after hot plastic deformation”, Metalloved. Term. Obrab. Met., No. 5, 15 (1964).Google Scholar
  8. 8.
    A. P. Gulyaev and R. P. Leshchinskaya, “Intercrystalline fracture of high-speed steel”, Metalloved. Term. Obrab. Met., No. 9, 22 (1963).Google Scholar
  9. 9.
    A. N. Popandopulo, “Kinetics and activation energy of grain growth in high-speed steels”, Metalloved. Term. Obrab. Met., No. 7, 71 (1974).Google Scholar

Copyright information

© Consultants Bureau 1977

Authors and Affiliations

  • A. N. Popandopulo
  • S. D. Popova
  • O. V. Kondrat'eva

There are no affiliations available

Personalised recommendations