【作者】 沈晓辉； 阎军； 章静； 江波；

【Author】 SHEN Xiaohui~(1,2),YAN Jun~2,ZHANG Jing~2,JIANG Bo~3 (1 College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;2.School of Material Science and Engineering,Anhui University of Technology,Ma’anshan 243002,Anhui,China;3.Maanshan Iron and Steel Co.,Ltd., Ma’anshan 243002,Anhui,China.)

【机构】 南京航空航天大学机电学院； 安徽工业大学材料科学与工程学院； 马鞍山钢铁股份有限公司；

【摘要】 研究火车轮成形过程的组织演变对预测和控制火车轮的晶粒度,进而提高火车轮的强韧性能具有重要意义。本文给出了一种车轮钢的动态再结晶和亚动态再结晶模型,对火车预成形过程的组织演变进行了模拟。得到了火车轮预成形结束后的晶粒尺寸分布情况:轮辋为50～60μm,辐极为30～50μm,轮毂内侧为30～45μm,轮毂外侧为50～1 80μm。由于亚动态再结晶和晶粒长大,轧制前晶粒尺寸分布为:轮辋为50～120μm,辐板为50～60μm,轮毂内侧为60～100μm,轮毂外侧为60～190μm。更多还原

【Abstract】 Study on the microstructure evolution in railway wheel forming has play active role in prediction and controlling grain size of microstructure,and further promotion the strength and toughness of wheel.In this research,microstructure evolution on preforming process of railway wheel is simulated by FEM based on the models of dynamic and metadynamic recrystallization prescribed.The results on grain size distribution of the preforming of railway wheel are obtained. The grain sizes are 50～60μm for wheel rim,30～50μm for wheel plate,30～45μm for inside part of hub and 50～180μm for outside part of hub when preforming finish.Due to the metadynamic recrystallization and grain grow,the grain sizes are 50～120μm for rim,50～60μm for plate, 60～100μm for inside part of hub and 60～100μm for outside part of hub.更多还原