Transactions of Materials and Heat Treatment

Title：Forging process and heat transfer coefficient calculation during heat treatment for railway wheel

Authors： Zhou Yu An Tao Shen Xiaohui Wang Kesheng Li Benben Ju Wenwie

Unit： Chaohu University Tyre and Wheel Company Ma′anshan Iron & Steel Co. Ltd. Anhui University of Technology

KeyWords： railway wheel die forging quench heating tread quenching heat transfer coefficient

ClassificationCode：TG161

year,vol(issue):pagenumber：2020,45(3):146-151

Abstract：

In order to study the internal metal flow during die forging and the heat transfer coefficient and the temperature change in quench heating and tread quenching process for railway wheel, the processes of die forging and heat treatment were simulated by the finite element method, and combined with the golden section optimization method, the inverse heat transfer calculation was performed on the comprehensive heat transfer coefficient. The results show that during the die forging process, the maximum equivalent strain appears in the contact area between the spoke and the upper die, the deformation on the outside of rim is relatively small, and the deformation in area near tread is uniform. However, the heat transfer coefficient increases with the increasing of the surface temperature during quench heating process. When the temperature is below 500 ℃, the heat transfer coefficient increases quickly with increasing temperature, after 500 ℃, the growth rate is slow, and at 800 ℃, the heat transfer coefficient reaches 0.15 kW·（m2·℃）-1. When the tread is quenched, the heat transfer coefficient increases rapidly with the decrease of temperature below 700 ℃, and it reaches a peak of 3.1 kW·（m2·℃）-1 at 300 ℃. However, below 250 ℃, the heat transfer coefficient decreases slightly, and it reaches 2.5 kW·（m2·℃）-1 at 100 ℃.

Funds：

安徽高校自然科学研究重大项目（KJ2019ZD47）；巢湖学院校级科研项目（XLY-201807）

周玉（1990-），女，硕士，讲师 E-mail：18315593012@163.com

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