Abstract
The selection of coolants for rail quenching at OAO Nizhnetagil’skii Metallurgicheskii Kombinat (NTMK) is considered. Thermohardening in aqueous polymer solution or hot water has been developed and tested. Economically alloyed steel may be used for rail manufacture after thermal hardening by compressedair cooling. The microstructure of disperse plastic pearlite is formed in three-stage quenching, with pearlite production in the surface layers of the rail during the first two stages.
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