Study of the structure and mechanical properties of corrosion-resistant steel with a high concentration of boron at elevated temperatures

• Published in: Physics of metals and metallography Vol. 115; no. 8; pp. 809 - 813
• Main Authors: Churyumov, A. Yu, Khomutov, M. G., Tsar’kov, A. A., Pozdnyakov, A. V., Solonin, A. N., Efimov, V. M., Mukhanov, E. L.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.08.2014; Springer; Springer Nature B.V
• Subjects: Borides; Boron; Chemistry and Materials Science; Corrosion; Corrosion resistant steels; High temperature; Materials Science; Mathematical models; Metallic Materials; Optimization; Plastic deformation; Spheroidizing; Steel; Strength and Plasticity; yield stress; steel; borides; microstructure
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X14080031

Because of the high cost of corrosion-resistant steels, a necessary condition for their production is reducing rejection at all stages of processing, including hot forming, by optimizing process parameters. In this work, the mechanical characteristics of a corrosion-resistant steel with high content of boron have been studied at elevated temperatures. Using a special complex for the physical simulation of thermomechanical processes, it has been shown that the optimum temperature range of hot compressive plastic deformation is 950–1100°C. A mathematical model has been constructed, which relates the yield stress to the parameters of the process of hot plastic deformation. During deformation in the range of 850–1150°C, the boride particles present in the steel become oriented perpendicular to the compression axis; at high temperatures, the spheroidization of titanium diborides occurs, which reduces their size.