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Study of the hot deformability of microalloyed steels using torsion tests

C. O. RUSĂNESCU1, M. RUSĂNESCU2,* , F. V. ANGHELINA3

Affiliation

  1. University Polytechnic, Faculty of Biotechnical Systems Engineering Bucharest, Romania
  2. Valplast Industries Bucharest, Romania
  3. Faculty of Materials and Mechanical Engineering,18-24 Unirii Bld., 130082, Valahia University of Targoviste, Romania

Abstract

The present paper emphasized the results of experimental researches concerning the influence of microalloying elements on the 31 VMn 12 steel characteristics for oil pipes manufacturing. In order to characterize the hot deformability 31 VMn 12 steels, the torsion test was used for three strain rates. (constant on testing) 0,01; 0.05; 0.1 sec-1 at temperatures of 8000C, 9000C, 10000C; 11000C, with strain directly on temperature, in an protective natrium atmosphere, until the failure point is reached. Structural aspects of the material used in the experiments are determined by optical microscopy. By using the interception method the mean value of the conventional diameter, for each heat under the initial deformation temperature condition, was determined..

Keywords

The deformation resistance, Microstructural analyze, Torsion test, Microalloyed steels, Deformability steels.

Submitted at: March 25, 2013
Accepted at: July 11, 2013

Citation

C. O. RUSĂNESCU, M. RUSĂNESCU, F. V. ANGHELINA, Study of the hot deformability of microalloyed steels using torsion tests, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 7-8, pp. 724-729 (2013)