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Metal Science and Heat Treatment

, Volume 18, Issue 3, pp 196–199 | Cite as

Effect of hydrostatic extrusion on mechanical properties of trip steels

  • B. I. Beresnev
  • I. Ya. Georgieva
  • V. G. Kozlov
  • G. A. Pigushina
  • V. P. Chernyshov
Structural Steels
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Conclusions

  1. 1.

    Hydrostatic extrusion increases the deformability of TRIP steels, which simplifies the treatment but retains the good combination of mechanical properties.

     
  2. 2.

    Good mechanical properties of TRIP steels are obtained by warm hydrostatic extrusion (250°), ensuring large reductions (75%): σ0.2=180 kg/mm2, σb=200 kg/mm2, δ=10%. Hydrostatic extrusion at room temperature permits reductions of only 44%, which leads to lower strength characteristics —σ0.2=150 kg/mm2, σb=174 kg/mm2 — although δ=34%.

     
  3. 3.

    Tempering of hydrostatically extruded TRIP steels leads to a substantial improvement in the strength and ductile characteristics. The best combination of properties is obtained with tempering at 550° after warm hydrostatic extrusion with 75% reduction: σ0.2=190 kg/mm2, σb=220 kg/mm2, δ=35%.

     
  4. 4.

    Stress—strain diagrams were analyzed and the effect of the martensitic transformation on the mechanical properties of TRIP steels was demonstrated.

     

Keywords

Mechanical Property Martensitic Transformation Substantial Improvement Large Reduction Good Combination 
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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Literature cited

  1. 1.
    V. Zackay et al., TASM,60, 252 (1967).Google Scholar
  2. 2.
    Yu. G. Virakhovskii et al., "Use of the martensitic transformation induced by deformation to improve the plasticity of austenitic steels strengthened by warm working", Fiz. Metal. Metalloved.,32, No. 2, 348 (1971).Google Scholar
  3. 3.
    B. I. Beresnev et al., Plasticity and Strength of Solids at High Pressures [in Russian], Nauka, Moscow (1970), p. 39.Google Scholar
  4. 4.
    V. G. Kozlov et al., First All-union Conference on Physics and Engineering of High Pressures [in Russian], Donetsk (1973), p. 174.Google Scholar

Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • B. I. Beresnev
  • I. Ya. Georgieva
  • V. G. Kozlov
  • G. A. Pigushina
  • V. P. Chernyshov

There are no affiliations available

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