20CrMnTi钢齿轮渗碳淬火的数值模拟与实验验证

Numerical Simulation and Experimental Verification of Carburizing⁃Quenching of Gear Made of 20CrMnTi Steel

赵爱彬 张园园 李荣华

Aibin Zhao Yuanyuan Zhang Ronghua Li

辽宁石油化工大学 机械工程学院，辽宁 抚顺 113001

School of Mechanical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

采用DEFORM?HT软件，对20CrMnTi钢齿轮的渗碳、淬火热处理工艺过程进行模拟，得出其渗碳后表层到心部碳质量分数变化。分析淬火后马氏体组织变化，并分析淬火后残余应力，选择适当的淬火冷却介质，通过试验测定其金相组织及表面至心部的洛氏硬度。结果表明，金相组织、洛氏硬度与模拟预测结果较吻合，对生产具有一定的指导意义。

In this paper, the heat treatment process of carburizing and quenching of 20CrMnTi steel gear was simulated by DEFORM?HT software, and the carbon mass fraction change from the surface layer to the core after carburization was obtained. The changes in the martensite structure after quenching were analyzed, the residual stress after quenching was analyzed, the appropriate quenching cooling medium was selected, and the metallographic structure and the Rockwell hardness from the surface to the core were measured through experiments. The results show that the metallographic structure and Rockwell hardness are in good agreement with the simulation results, which have certain guiding significance for production.

国家自然科学基金青年科学基金项目(52001153)

10.3969/j.issn.1672-6952.2022.01.011