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1、安徽工程大学机电学院毕业设计（论文）I齿轮用钢的热处理工艺设计齿轮用钢的热处理工艺设计摘摘 要要 热处理工艺是金属材料工程的重要组成部分。通过热处理可以改变材料的加工工 艺性能，充分发挥材料的潜力，提高工件的使用寿命。热处理不仅对锻造机械加工的 顺利进行和保证加工效果起着重要作用， 而且在改善或消除加工后缺陷，提高工件的 使用寿命等方面起着重要作用。 该课题是根据齿轮使用条件和性能要求，选择不同的材料，进行相应的热处理工 艺设计，包括加热温度、保温时间、冷却方式和冷却介质等。并通过退火、调质、渗 碳、等热处理，分析组织和性能的变化，在实验基础上，验证所设计热处理工艺的正 确性。最终得到的结论是
2、，分别选择 45 钢和 Q235 钢作为齿轮材料，45 钢采用退火和 调质处理，Q235 钢采用退火、渗碳、淬火和低温回火处理。 实践证明要想获得理想的组织与性能，保证零件在生产过程中的质量稳定性和使 用寿命，就必须从工件的特点 要求和技术条件，认真分析产品在使用过程中的受力 状况和可能失效形式，正确选择材料；再根据生产规模现场条件热处理设备提出 几种可行的热处理方案，最后根据其经济性方便性质量稳定性和便于管理降低 成本等因素，确定出一种最佳方案。 关键词：关键词：退火；调质；渗碳；组织；性能余康达：齿轮用钢的热处理工艺设计IIHeat Treatment Process Design of
3、Steel Used for gearAbstractThe heat treatment process is an important part of the metal materials engineering. Processing performance of the material can be changed by heat treatment, give full play to the potential of materials to improve the life of the workpiece. The heat treatment not only for t
4、he processing of forging machinery is carried out smoothly and to ensure that processing effects play an important role, and plays an important role in the improvement or elimination of processing defects and improve the life of the workpiece. In this subject,I chose different materials according to
5、 the gear conditions of use and performance requirements,and carried on the corresponding heat treatment process design, including the heating temperature, holding time, cooling mode and cooling medium, etc. And through the annealing, coating, such as carburizing, heat treatment, the analysis organi
6、zation and the change of the performance, on the basis of experiment, verify the correctness of design by heat treatment process. The final conclusion is that, select the 45 steel and Q235 steel as a gear material, 45 steel by annealing and quenching and tempering treatment, Q235 steel by annealing,
7、 carburizing, quenching and low tempering. Practice has proved that in order to obtain the desired microstructure and properties, to ensure the quality stability and service life of parts in the production process, from the characteristics of the workpiece, requirements and technical conditions, a c
8、areful analysis of the force status of the product during use and mayfailure modes, the correct choice of materials; several possible heat treatment program according to the scale of production, site conditions, the heat treatment equipment, and last based on the stability of its economy, convenienc
9、e, quality and ease of management, reduce costs and other factors to determine athe best solution. Key words: annealing；hardening and tempering；carburization； organization；property安徽工程大学机电学院毕业设计（论文）III目录目录引引 言言 1 第第 1 章章 绪绪 论论 2 1.1 齿轮热处理的理论基 础2 1.1.1 热处理的定 义2 1.1.2 热处理的分 类2 1.2 齿轮热处理的研究现状与发展趋 势3 1.2.1 研究现 状 3 1.2.2 发展趋 势 4 1.3 本论文研究的主要内容及意 义4 1.3.1 主要内 容 4 1.3.2 研究意 义 5 第第 2 章章 热处理工艺设热处理工艺设 计计6 2.1 零件的结构与工作条 件6 2.1.1 机床齿轮的结 构6 2.1.2 齿轮的服役条件和失效形 式6 2.2 零件材料的选 择7 2.2.1 热处理零件的选材原 则7余康达：齿轮用钢的热处理工艺设计IV2.2.2 选材应注意的问 题8 2.3 热处理工艺方案的制 定8 2.3.1 零件的技术要 求
