Heat Treatment of Metals ›› 2024, Vol. 49 ›› Issue (6): 270-276.DOI: 10.13251/j.issn.0254-6051.2024.06.042

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Research progress on on-line heat treatment technology for U75V steel rail with 100-meter length

Zhanghui Zeying1, Gao Mingxin1,2, Song Hua1, Wang Yang2, Yang Jian1   

  1. 1. School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan Liaoning 114051, China;
    2. School of Innovation and Entrepreneurships, University of Science and Technology Liaoning, Anshan Liaoning 114051, China
  • Received:2023-11-08 Revised:2024-04-21 Online:2024-06-25 Published:2024-07-29

Abstract: Methods, characteristics and research progress of on-line heat treatment process for U75V steel rail with 100-meter length were summarized. Effects of heat treatment cooling process parameters and spray cooling process parameters on the production efficiency, microstructure and mechanical properties of the heat treated U75V steel rail with 100-meter length were introduced. Suggestions for future research on the heat treatment process of pearlite rail with 100-meter length were proposed. It is meaningful to study the effect of cooling process parameters on the microstructure and mechanical properties of the steel rails, with the goal of shortening the required heat treatment cooling time, and optimize them. Reducing the allowable fluctuation range of alloy composition content is beneficial for improving the properties of the U75V steel rail in combination with the optimization of heat treatment process. A nozzle or air spraying process that combines heat transfer capability and uniformity is beneficial for optimizing the heat treatment process of the steel rails and improving their properties.

Key words: U75V steel rail with 100-meter length, on-line heat treatment, cooling process, mechanical properties, research progress

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