The Oxidation of Steel at High Temperatures and Its Effect on Die Surface Temperatures in Hot Forging

  • M. A. Kellow
  • T. A. Dean
  • F. K. Bannister
Chapter

Synopsis

Experiments to determine the effect of the heating time in air on the surface oxidation of 080 M40 (En8) steel billets are described. Subsequent simple upsetting tests, both on a high speed Petro-Forge and a low speed hydraulic press*, show how the degree of surface oxidation affects die surface temperatures.

Theoretical analyses of the transient die surface temperatures during these forging operations give a reasonable correlation with experimental results obtained from the low speed forging tests. An elaboration of the theory to describe the high speed forging was less successful due to inadequate knowledge of the thermal properties of the oxides under the forging conditions and to the sensitiveness of the results to the values used,

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Copyright information

© The Department of Mechanical Engineering, University of Birmingham 1977

Authors and Affiliations

  • M. A. Kellow
    • 1
  • T. A. Dean
    • 1
  • F. K. Bannister
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of BirminghamUK

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