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以合金钢齿轮18Cr Ni Mo7为设计原型,通过合金渗碳建模、渗碳淬火过程的计算机模拟得到了合金齿轮不同区域的渗碳变化规律,并采用有效硬化层法、金相法和化学剥层法得到了实际渗碳过程中的渗碳层深度与碳浓度分布特征。结果表明,随着距离合金齿轮表面距离的增加,碳含量逐渐降低;采用化学分析法测得的不同部位的碳含量分布与计算机模拟结果吻合。可以通过计算机模拟的方法预测渗碳工艺条件下最终热处理完成后有效硬化层的深度,这样就可以增加生产效率。
Taking 18Cr Ni Mo7 alloy steel as prototype, the carburizing rules of different regions of alloy gears were obtained by computer simulation of carburizing and carburizing quenching. The hardened layer method, metallographic method and chemical peel-off method The carburizing depth and carbon concentration distribution in the actual carburizing process were obtained. The results show that the carbon content gradually decreases with the increase of the distance from the surface of the alloy gear. The distribution of carbon content at different sites measured by chemical analysis agrees well with the computer simulation results. The depth of the effective hardened layer after the final heat treatment at the carburizing process condition can be predicted by computer simulation to increase the production efficiency.