Publication detail
Heat treatment of rails
HNÍZDIL, M. KOTRBÁČEK, P.
English title
Heat treatment of rails
Type
journal article in Web of Science
Language
en
Original abstract
Heat treatment is increasingly used in the heavy industry. The main advantage of this method is the achievement of the required material and mechanical properties. Heat treatment allows for a manufacturing process, which can improve product performance by increasing the steel strength, hardness and other desirable characteristics. The microstructure, grain size and chemical composition of steel affect its overall mechanical behavior. Heat treatment is an efficient way to manipulate the properties of a steel product by controlling the cooling rate. It can be expressed using the heat-transfer coefficient (HTC). The controllability of the cooling process is very important. Mist and water nozzles may provide good controllability of the HTC. An experimental stand was designed and built. The stand consists of a movable trolley with a test sample, which moves under a spray at a given velocity. Sensors record the temperature history of the tested material. This experimental stand enables simulations of a variety of cooling regimes and evaluations of the final structures of tested samples. The same experimental stand is also used for designing cooling sections in order to determine the required heat-treatment procedures and the final structures. This paper describes a cooling-section design procedure for obtaining the required structure and mechanical properties of rails.
English abstract
Heat treatment is increasingly used in the heavy industry. The main advantage of this method is the achievement of the required material and mechanical properties. Heat treatment allows for a manufacturing process, which can improve product performance by increasing the steel strength, hardness and other desirable characteristics. The microstructure, grain size and chemical composition of steel affect its overall mechanical behavior. Heat treatment is an efficient way to manipulate the properties of a steel product by controlling the cooling rate. It can be expressed using the heat-transfer coefficient (HTC). The controllability of the cooling process is very important. Mist and water nozzles may provide good controllability of the HTC. An experimental stand was designed and built. The stand consists of a movable trolley with a test sample, which moves under a spray at a given velocity. Sensors record the temperature history of the tested material. This experimental stand enables simulations of a variety of cooling regimes and evaluations of the final structures of tested samples. The same experimental stand is also used for designing cooling sections in order to determine the required heat-treatment procedures and the final structures. This paper describes a cooling-section design procedure for obtaining the required structure and mechanical properties of rails.
Keywords in English
Heat transfer; Heat treatment; Heat-transfer coefficient; Spray cooling
Released
01.04.2017
Publisher
Institute of Metals and Technology
Location
Ljubljana, Slovenia
ISSN
1580-2949
Volume
51
Number
2
Pages from–to
329–332
Pages count
4
BIBTEX
@article{BUT135211,
author="Milan {Hnízdil} and Petr {Kotrbáček},
title="Heat treatment of rails",
year="2017",
volume="51",
number="2",
month="April",
pages="329--332",
publisher="Institute of Metals and Technology",
address="Ljubljana, Slovenia",
issn="1580-2949"
}