Effect of Thermo-Mechanical Treatment with Various Annealing Hold Conditions on Al Alloyed TRIP Steel

Kučerová, Ludmila; Jandová, Andrea; Jeníček, Štěpán

doi:10.21062/ujep/174.2018/a/1213-2489/mt/18/5/764

Manufacturing Technology

2018

DOI: 10.21062/ujep/174.2018/a/1213-2489/mt/18/5/764

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Effect of Thermo-Mechanical Treatment with Various Annealing Hold Conditions on Al Alloyed TRIP Steel

Ludmila Kučerová¹,

Andrea Jandová²,

Štěpán Jeníček³

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Cited by 2 publications

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Effect of soaking temperature on the microstructure and mechanical properties of heat-treated Al-Si-Nb TRIP steel

Kučerová¹,

Burdová²,

Stehlík³

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Two-step heat treatment with bainitic hold at 425 °C was applied to low alloyed high strength steel with partial substitution of silicon by aluminium. The steel was further micro-alloyed by niobium. Various soaking temperatures in the range of 750-1250 °C were used to analyse the effect of soaking on mechanical properties and microstructure of the steel. According to calculations in JMatPro, the temperatures below 900 °C should lie in an intercritical (tow phase) region, while the temperature of 900 °C should be the first one to ensure full austenitization of this steel. To dissolve different portion of niobium into solid solution, higher soaking temperatures were also used. Tensile strengths of 780-1069 MPa and total elongation of 22-46 % were achieved.

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Effect of soaking temperature on the microstructure and mechanical properties of heat-treated Al-Si-Nb TRIP steel

Kučerová¹,

Burdová²,

Stehlík³

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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

Kučerová¹,

Bystrianský²,

Jeníček³

2019

Manufacturing Technology

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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.

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Effect of Thermo-Mechanical Treatment with Various Annealing Hold Conditions on Al Alloyed TRIP Steel

Cited by 2 publications

References 12 publications

Effect of soaking temperature on the microstructure and mechanical properties of heat-treated Al-Si-Nb TRIP steel

Effect of soaking temperature on the microstructure and mechanical properties of heat-treated Al-Si-Nb TRIP steel

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

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