【作者】 王子成；

【导师】 盛光敏；

【作者基本信息】 重庆大学 ， 材料学， 2003， 硕士

【摘要】 本文采用现场热处理工艺实验、奥氏体再结晶理论分析和淬火温度场数值分析相结合的方法，研究了PD3高碳耐磨钢球的生产工艺和性能，制定出了适应大批量生产的钢球热处理工艺，并最终获得了质量优异的PD3高碳耐磨钢球。为了寻求高碳耐磨钢球的理想生产工艺参数，优化耐磨钢球的生产工艺，本文设计了高碳钢在不同条件下的热处理工艺，并分别进行了现场生产实验与实验室实验。为此应用Gleeble－1500D热模拟机模拟高碳钢在不同条件下的高温形变热处理过程。测定各种工艺下的真应力－应变曲线，观察了奥氏体的动态再结晶情况,研究了变形温度与变形速率对奥氏体动态再结晶过程的影响，并结合再结晶动力学理论进行分析，得到了理想的热处理工艺，生产出了具有较高硬度和冲击韧性的钢球产品。为了控制和进一步提高钢球质量，作者编制了相关程序，对钢球淬火过程中温度场进行模拟，并给出了此软件的一些计算结果，模拟计算结果与实验数据吻合较好。更多还原

【Abstract】 In this paper, properties and production process of PD3 high carbon wearable steel ball have been studied by using a combination of experimental, theoretical and numerical analysis. A production process meeting the requirements of mass production has been designed; by this production technique high quality steel ball has been successfully produced. In order to obtain the best parameters of production process of steel ball and further optimize the production technique, the heat treatment of high carbon steel under different conditions has been carried out in both laboratory and production line. High-temperature thermomechanical treatment of high carbon steel under different conditions has been carried out on Gleeble-1500D. The true strain-stress curve of high carbon steel has been obtained. The dynamic recrystallization of Austenite has been investigated, and the effect of deformation temperature and deformation rate on the dynamic recrystallation has been also studied. The results show that the steel ball gets higher hardness and toughness when forged at 1050℃ at a high deformation rate. In order to further improve the quality of the steel ball, special software has been developed, to simulate the temperature field of the steel ball when it is being quenched; the results calculated by the software agreed well with the theoretical analysis. Finally some numerical examples about the software are presented.更多还原