Temperature field calculation of rail flash welding

High-speed Railway Pub Date : 2024-06-01 DOI:10.1016/j.hspr.2024.03.001

Rui Xu , Min Zhang , Zhenkun Gao , Guo Zhao , Wei Ding , Shouming Wang , Peng Zhang , Xiang Liu , Jingjing Li

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Abstract

The forging stage of rail flash welding has a decisive influence on joint strength, and the study of the temperature distribution in the process has an important role in further improving joint strength. In this paper, three calculation methods for the temperature field are given. First, the finite element model of the temperature field before forging rail flash welding is established by using the transient heat module of Ansys software and verified by infrared temperature measurement. Second, the temperature distribution of different parts of the rail before flash welding is obtained by using infrared thermal imaging equipment. Third, Matlab software is used to calculate the temperature of the non-measured part. Finally, the temperature distribution function along the rail axis is fitted through the temperature measurement data. The temperature distribution before the top forging of the rail flash welding can be used to analyze the joint and heat-affected zone organization and properties effectively and to guide the parameter setting and industrial production.

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轨道闪光焊接的温度场计算

钢轨闪光焊接的锻造阶段对接头强度有着决定性的影响，研究锻造过程中的温度分布对进一步提高接头强度有着重要作用。本文给出了三种温度场的计算方法。首先，利用 Ansys 软件的瞬态热模块建立了锻造轨道闪光焊接前温度场的有限元模型，并通过红外测温进行了验证。其次，利用红外热成像设备获取钢轨闪焊前不同部位的温度分布。第三，使用 Matlab 软件计算未测量部分的温度。最后，通过温度测量数据拟合出沿钢轨轴线的温度分布函数。利用钢轨闪光焊接顶锻前的温度分布，可以有效分析接头和热影响区的组织和性能，指导参数设置和工业生产。

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High-speed Railway

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