DEFINITION OF COOLING RATE ALONG A HEAD SECTION OF RAILS AT THERMAL PROCESSING WITH AIR
https://doi.org/10.17073/0368-0797-2016-8-543-546
Abstract
Cooling rate is one of the major parameters of thermal processing. The experiments on the diff erentiated thermal processing by air of rails of R65 type are made on skilled installation to purpose an establishment of microstructure formation rules in a rails heads. In the course of thermal processing the temperature was measured in points characterizing the quality of rails training at acceptance tests at the depth of 10 mm and 22 mm from a surface of a head driving on the central line of symmetry axis of a rail. Metal cooling rate was calculated in the range of temperatures of pearlite transformations. Change dependence of cooling rate of rail metal on air pressure was established. The dependences received during the experiment possess high factor of reliability that allows applying them in forecasting of cooling rate at pressure increase by means of extrapolation.
About the Authors
E. V. Polevoi
JSC “EVRAZ - Joint West Siberian Metallurgical Plant”, Novokuznetsk, Russia
Russian Federation
Russian Federation
Head of the Bureau of Physical Metallurgy and Thermal Treatment of the Technical Department of Rail Area
M. V. Temlyantsev
Siberian State Industrial University, Novokuznetsk, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor, Vice-Rector for Research and Innovations
A. Y. Suysuykin
JSC “EVRAZ - Joint West Siberian Metallurgical Plant”, Novokuznetsk, Russia
Russian Federation
Russian Federation
Chief Specialist on Thermal Units of Rail and Beam Shop
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Review
For citations:
Polevoi E.V., Temlyantsev M.V., Suysuykin A.Y. DEFINITION OF COOLING RATE ALONG A HEAD SECTION OF RAILS AT THERMAL PROCESSING WITH AIR. Izvestiya. Ferrous Metallurgy. 2016;59(8):543-546. (In Russ.) https://doi.org/10.17073/0368-0797-2016-8-543-546
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