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空心车轴是高速列车的核心部件,其成形方法与质量直接决定着高铁装备的技术水平。采用多楔轧制空心车轴,建立了材料的微观组织模型,获得了多楔同步轧制空心车轴的热、力和微观组织相互耦合的有限元模型;通过对多楔同步轧制空心车轴的模拟,对轧制初始温度、成形角以及展宽角对晶粒平均尺寸的影响规律进行了系统研究,结果能保证轧件具有均匀细小的晶粒尺寸及良好的力学性能。
Hollow axle is the core of high-speed train components, the forming method and quality directly determines the technical level of high-speed rail equipment. The multi-wedge hollow shaft was used to build the microstructure model of the material, and the finite element model of the multi-wedge synchronous hollow shaft was obtained. By simulating the multi-wedge synchronous rolling hollow shaft, The effects of initial rolling temperature, forming angle and broadening angle on the average grain size have been studied systematically. The results show that the rolling grain size can be uniformly and finely distributed with good mechanical properties.