Nizhniy Tagil Iron and Steel Works – “EVRAZ NTMK” JSC (Nizhniy Tagil, Russia):

Kushnarev A. V., Dr. Eng., Managing Director, e-mail: director@ntmk.ru
Kirichkov A. A., Cand Eng., Advisor of managing Director on Scientific and Technical Development
Petrenko Yu. P., Cand. Eng., Head of the Central Quality Laboratory

Ural State Federal University (Ekaterinburg, Russia):

Bogatov A. A., Dr. Eng., Prof., Head of the Chair of Metal Forming

The paper presents the results of investigations of the effect of rate cooling of samples on forming the structure and hardness for three wheel steel grades (2, T and C). T and C steel grades are already developed and mastered in production conditions. The results have been received using Gleeble 3500 complex and thermal kinetic diagrams of decomposition of overcooled austenite have been built; they allowed to reveal the rational quenching conditions for railroad wheels and to develop construction of quenching tables. The cooling procedure for different wheel rim parts have been determined for each steel grade. It is mentioned that high accuracy of heating temperature (±5 °C) for wheels during their quenching and tempering has been achieved. The new equipment for wheel heating and cooling during heat treatment has been developed and put into operation. The automatized wheel cooling system during quenching has been suggested and tested. In general, the new technology for wheel production with increased hardness and wear resistance has been mastered.

1. Kushnarev A. V., Kirichkov A. A., Koptseva N. V. et al. Strukturnofazovye prevrashcheniya pri nepreryvnom okhlazhdenii staley dlya tselnokatanykh zheleznodorozhnykh koles (Structural-phase transformations during continuous cooling of steels for onepiece rolled railway wheels). Stal = Steel. 2014. No. 4. pp. 78–83.
2. Poschmann I. Materials, Heat Treatment Process and Heat Treatment Facilities for Modern Railway Wheels. I. Poschmann, E. Tschapowetz, M. Herriger, S. Groene. Sovremennye tekhnologii proizvodstva transportnogo metalla: materialy tretey Mezhdunarodnoy konferentsii «Transmet-2007» (Modern technologies of transport metal production: materials of the third International conference “Transmet-2007”). Under the scientific editorship of A. V. Kushnarev and A. A. Bogatov. Ekaterinburg : Ural State Technical University – Ural Polytechnic Institute, 2008. pp. 129–132.
3. A. V. Kushnarev, N. V. Telyashov, S. V. Khlyst et al. Sovremennyy kompleks termoobrabotki zheleznodorozhnykh koles (Modern complex of thermal treatment of railway wheels). Chernaya metallurgiya. Byulleten nauchno-tekhnicheskoy i ekonomicheskoy informatsii = Ferrous metallurgy. Bulletin of scientific-technical and economic information. 2010. No. 4. pp. 38–39.
4. Poschmann I. Heat treatment process and facility for railway wheels. I. Poschmann, E. Tschapowetz, H. Rinnhofer. HTM – Haerterei-Technische Mitteilungen. 2007. 62 (1). pp. 19–21.
5. A. V. Kushnarev, M. S. Fomichev, A. A. Kirichkov et al. Sposob termicheskoy obrabotki zheleznodorozhnykh koles (Method of thermal treatment of railway wheels). Patent RF, No. 2451093, IPC С 21 D 9/34. No. 2010112161/02. Published: May 20, 2012.
6. Opredelenie vliyaniya skorosti okhlazhdeniya na prevrashcheniya pereokhlazhdennogo austenita v stalyakh: tekhnicheskiy otchet (Definition of cooling rate influence on transformations of supercooled austenite in steels: technical report). Work DGNTZ-00-7408/2013/ G. I. Nosov Magnitogorsk State Technical University. (in Russian).