Manufacturing Technology 2019, 19(1):95-100 | DOI: 10.21062/ujep/250.2019/a/1213-2489/MT/19/1/95

Thermo-mechanical Treatment of 0.4C-0.6Mn-2Si Steel with Various Soaking and Annealing Hold Temperatures

Ludmila Kučerová, Martin Bystrianský, ©těpán Jeníček
Regional Technological Institute, University of West Bohemia in Pilsen, Univerzitní 8, 30614 Plzeň. Czech Republic

Middle carbon low alloyed steel 0.4C-0.6Mn-2Si was subjected to thermo-mechanical treatment typical for TRIP (transformation induced plasticity steels). The processing consisted from soaking at the temperatures of 850-1000 °C and cooling at 30 °C/s to various annealing holds in bainite transformation temperature interval of 350-500 °C. During the cooling from the soaking temperature, two compressive deformations were carried out, the second one always at 720 °C. Resulting microstructures were analysed using light and scanning electron microscopy. X-ray diffraction phase analysis was carried out to establish volume fraction of retained austenite and mechanical properties were measured by tensile test. Tensile strengths in the region of 847-963 MPa were obtained and very good total elongations of 30-40% were achieved at the same time. Multiphase microstructures were obtained with various amounts of ferrite, bainite, retained austenite and pearlite.

Keywords: Middle carbon steel, Thermo-mechanical treatment, Retained austenite, TRIP steel
Grants and funding:

Project LO1502 ‘Development of the Regional Technological Institute‘ under the auspices of the National Sustainability Programme I of the Ministry of Education, Youth and Sports of the Czech Republic.

Published: February 1, 2019  Show citation

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Kučerová L, Bystrianský M, Jeníček ©. Thermo-mechanical Treatment of 0.4C-0.6Mn-2Si Steel with Various Soaking and Annealing Hold Temperatures. Manufacturing Technology. 2019;19(1):95-100. doi: 10.21062/ujep/250.2019/a/1213-2489/MT/19/1/95.
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