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Journal of Applied Metalworking

, Volume 2, Issue 4, pp 243–248 | Cite as

The influence of heat treatment and cold forging on machinability of low alloyed steels

  • S. Abeyama
  • A. Kimura
  • S. Nakamura
Article

Conclusions

The following conclusions summarize the above results.
  1. 1.

    In drilling the SCr420 series as heat treated, the maximum tool life occurs around Hvl70 to 190 in the ferrite plus pearlite structure and is considerably reduced with the coexistence of spherical cementite.

     
  2. 2.

    In drilling the SCr420 series after cold forging, tool life is shortened slightly, while the torque is suppressed. Free machining additives, S and Te, improve tool life even for heavily forged materials.

     
  3. 3.

    In the gear hobbing SCM420 series, the softer and more spheroidized steel exhibits the longer tool life. The Ca addition with S and Te increases the life of the TiN coated hob tool.

     

Keywords

Torque Ferrite Pearlite Tool Life Apply Metalworking 
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.

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References

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Copyright information

© American Society for Metals 1983

Authors and Affiliations

  • S. Abeyama
    • 1
  • A. Kimura
    • 1
  • S. Nakamura
    • 1
  1. 1.Daido Steel Company, Ltd.NagoyaJapan

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