论文部分内容阅读
钢铁零件的性能主要决定于所采用的热处理工艺。钢的淬透性决定于合金元素含量,而淬火烈度确定了整个零件中不同部位的温度随时间变化过程。总的来说,零件最终的组织、力学性能、残余应力状态和服役性能均取决于钢的淬透性和淬火工艺。残余应力状态,特别是表面应力状态,是影响零件疲劳寿命的重要因素,可通过控制钢的淬透性和淬火工艺来提高零件的表面压应力,从而提高疲劳寿命。热处理工艺的计算机模拟,包括加热和冷却过程中的相变的计算,提供了一种科学地进行热处理工艺设计、钢种选择以优化某一特定产品性能的方法。本文采用热处理模拟软件DANTE来论证这种设计方法在正齿轮上的应用。
The performance of steel parts depends mainly on the heat treatment process used. The hardenability of steel depends on the content of alloying elements, while the quenching severity determines the temperature over time for different parts of the entire part. In general, the final organization of parts, mechanical properties, residual stress state and service performance are dependent on the hardenability of steel and quenching process. Residual stress state, especially the surface stress state, is an important factor that affects the fatigue life of parts. It can improve the fatigue life by controlling the hardenability of steel and quenching process to improve the surface compressive stress. Computer simulations of heat treatment processes, including the calculation of phase transitions during heating and cooling, provide a scientific method of heat treatment process design, steel selection to optimize the performance of a particular product. In this paper, heat treatment simulation software DANTE to demonstrate this design method in the spur gear applications.