齿轮轴承钢坯模锻过程晶粒尺寸演变模拟

发布时间：2018-05-25 08:03

本文选题：齿轮轴承钢 + 模锻　；参考：《钢铁》2015年09期

【摘要】：齿轮轴承钢坯模锻过程中不同部位的形变参数变化极不均匀,晶粒尺寸演变规律复杂多变。通过Gleeble等温热压缩试验获得材料物性参数,利用YLJ再结晶模型对有限元软件DEFORM-3D进行二次开发,进而模拟出模锻过程中齿轮轴承钢坯的晶粒尺寸演变规律。研究发现:齿轮轴承钢坯晶粒尺寸在锻造期呈脉冲变化,不同部位的晶粒在再结晶期增长幅值不一样,底部边缘和中下部晶粒尺寸易粗化,中心和中上部晶粒尺寸比较小;将锻件心部和底部边缘的晶粒形貌和晶粒尺寸与模拟结果进行对比,模拟与实际结果对应良好。提出的晶粒演变模拟方法能很好预测模锻过程复杂的晶粒尺寸演变规律。
[Abstract]:The deformation parameters of different parts in the forging process of gear bearing billet are extremely uneven and the grain size evolution law is complex and changeable. The physical parameters of the material were obtained by Gleeble isothermal compression test. The finite element software DEFORM-3D was redeveloped by using YLJ recrystallization model, and then the grain size evolution law of gear bearing billet during die forging was simulated. The results show that the grain size of gear bearing billet varies with pulse during forging period, the increasing amplitude of grain in different parts is different during recrystallization period, the grain size of bottom edge and middle and lower part is easy to coarsening, and the grain size of center and middle upper part is smaller. The grain morphology and grain size at the center and bottom edge of the forgings are compared with the simulation results, and the simulation results correspond well with the actual results. The simulation method of grain evolution can well predict the complex grain size evolution in die forging process.
【作者单位】：北京科技大学冶金与生态工程学院;钢铁研究总院特殊钢研究所;
【基金】：国家高技术研究发展(863)计划资助项目(2012AA03A503)
【分类号】：TG316.3

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