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Study of Metal Forming in the Mashy State 2nd Report: Extrusion of Tube, Bar and Wire of Alloys in Mashy State

  • M. Kiuchi
  • S. Sugiyama
  • K. Arai

Summary

In order to investigate the general aspect of the mashy state extrusion, the authors made extrusion tests of Pb-alloy and Al-alloys, and uniaxial tensile tests and observation of the micro-structures of the extruded products were carried out. Results were as follows. (1) Bar, wire and tube were successfully extruded at high reduction with small force. (2) As the solid component decreased from 100% to 80~70% the extrusion pressure dropped to 1/4~1/5 of that for conventional hot extrusion. (3) When the solid fraction was lower than 80%, the effect of frictional force between billet and container or die was found to be almost negligible. (4) In order to attain the stable extrusion the residual solid fraction of product shuld be higher than 90~95%. (5) Depending on the decrease of solid fraction of billet, the tensile strength of the extruded product decreased, but the elongation was not affected seriously. (6) The micro-structure of the extruded product was generally fine and the fiber structure was hardly observed.

Keywords

Flow Stress Solid Fraction Extrusion Process Uniaxial Tensile Test Liquidus Component 
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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Reference

  1. (1).
    S. Fukuoka and M. Kiuchi, “ A STUDY ON PLASTIC WORKING OF ALLOYS IN THEIR MASHY STATE ”, Proceedings of The 14th Int. MTDR Conference (1974).Google Scholar
  2. (2).
    S. Fukuoka, M. Kiuchi and K. Arai, “ A STUDY ON PLASTIC WORKING OF ALLOYS IN THEIR MASHY STATE 2nd Report ”, Proceedings of The 15th Int. MTDR Conference (1975).Google Scholar
  3. (3).
    M. Kiuchi, S. Fukuoka and K. Arai, “ EXTRUSION OF METAL (ALLOY) IN MASHY STATE ” Journal of JSTP, Vol. 18, no. 199 (1977–8).Google Scholar
  4. (4).
    M. Kiuchi, S. Sugiyama and K. Arai, “STUDY OF METAL FORMING IN MASHY STATE 1st Report ”, Proceedings of The 20th Int. MTDR Conference (1971).Google Scholar

Copyright information

© The Department of Mechanical Engineering, University of Birmingham 1980

Authors and Affiliations

  • M. Kiuchi
    • 1
  • S. Sugiyama
    • 1
  • K. Arai
    • 1
  1. 1.Institute of Industrial ScienceUniversity of TokyoMinato-Ku, TokyoJapan

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