中文摘要：

通过有限元方法,探讨材料成分波动对齿轮渗碳淬火工艺性能的影响。以20CrMnTi半轴齿轮作为研究对象,利用JMATPRO软件,根据材料的化学元素波动的最大值与最小值分别建立2组材料性能数据库;基于DEFORM-HT软件,建立适用于渗碳淬火工艺的仿真数学模型,并对这2组材料性能数据库下的半轴齿轮分别进行渗碳淬火工艺仿真,对比分析齿轮渗碳淬火仿真后的各项参数。研究结果表明：材料成分波动对齿轮渗碳层影响较小,对淬火后相组织分布和齿轮变形量有较大影响。

英文摘要：

The discussion about the effect of 20CrMnTi material compositions fluctuation on gear carburizing-quenching performance was done using FEM. Taking 20CrMnTi side gear as the research object, two groups of material properties databases were set up according to the maximum and the minimum values of chemical elements fluctuation by JMATPRO software. Simulation mathematical model was built for carburizing-quenching process based on DEFORM-HT software. Some simulations were done for gear carburizing-quenching process with two material databases. Simulation results were compared. The results show that material compositions fluctuation has little impact on carburized layer, and has great impact on distribution of quenching phases and deformation of gear.