汽车驱动系统的重要安全保障部件都力求其具有高强度、耐磨损及尺寸精度高等高质量。其中在AT组件中的离合器衬套、卷筒以及CVT组件的油压部件中就有很多的厚度差精密、形状复杂的零部件。这些零部件通常都是经过铸造、锻造后分别成型,然后经过表面硬化处理后再组装到一起制成的。近年来为降低制造成本,采取使用高碳素钢除 The key safety components of automotive drive systems are all seeking high quality with high strength, wear resistance and dimensional accuracy. Among them, there are a lot of precision and complicated parts in the hydraulic pressure components of the clutch bush, the reel and the CVT component in the AT component. These parts are usually cast, forged, respectively, after forming, and then after hardening the surface and then assembled together. In recent years to reduce manufacturing costs, the use of high carbon steel addition