Effect of Asymmetric Rolling with Cone-Shaped Rolls on Microstructure and Tensile Properties of Low-Carbon Steel

Abstract:

The effect of asymmetric rolling with cone-shaped rolls on ultra-fine grain evolution was investigated. To do this, low-carbon steel containing 0.15 % C (mass fraction) billet (h|b|l = 10|45|100 mm³) with the initial average grain size of 60 μm was deformed up to the thickness of 5mm in cone-shaped rolls with diameters ratio of 1.5, as well as in cylindrical rolls. Rolling was conducted at three different temperatures: 900 °C, 1000 °C and 1100 °C. Four passes of asymmetric rolling in cone-shaped rolls were given to gain thickness of 5 mm with total reduction of 61,7 %. It has been shown that during asymmetric rolling in cone-shaped rolls at low temperature of 900 °C grain size is smaller (0.092 μm – at the surface layer and 0.112 μm – at the middle layer) than that of 1000 °C and 1100 °C. Tensile properties of asymmetrically rolled specimen were much higher (580 MPa) in comparison to symmetrically rolled one (486 MPa).

• Periodical: Advanced Materials Research (Volume 1105)
• Pages: 149-153
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1105.149
• Online since: May 2015
• Authors: Toleu K. Balgabekov, Eldar M. Azbanbayev, Aristotel Z. Isagulov, Diana A. Isagulova, Nurlybek B. Zakariya, Nursultan Z. Yermaganbetov, Akbope R. Kenzhekeeva, Zhazira A. Konirova
• Keywords: Asymmetric Rolling, Cone-Shaped Rolls, Low-Carbon Steel, Microstructure, Properties

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