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同步器齿毂正在向形状较复杂与较高使用性能发展,同时在生产成本上也受到很大压力。当今许多高性能同步器齿毂都是由各种,诸如Distaloy AE与Distaloy HP之类扩散粘结粉末生产的。新的要求是希望材料与制造工艺具有好的性价比。这意味着不使用价格不稳定,而且高的纯镍与钼,最好改用以铬为基的,不用或添加少量纯镍的预合金化粉末。Astaloy CrA与Astaloy LH都是适用于烧结硬化的预合金化粉末。通过添加数量不同的铜或镍及含碳量可制得所需要的不同强度。利用CCT(连续冷却转变)-图,可利用冷却速率来选择最佳组成。
Synchronizer tooth hub is to the shape of the more complex and high performance development, while the production costs are also under great pressure. Many of today’s high-performance synchronizer hubs are made from a wide variety of diffusion bonded powders such as Distaloy AE and Distaloy HP. The new requirement is that materials and manufacturing processes have a good price / performance ratio. This means that instead of price-stable, high pure nickel and molybdenum, it is best to switch to chromium-based rather than or with a small amount of pre-alloyed powder of pure nickel. Both Astaloy CrA and Astaloy LH are pre-alloyed powders for sinter hardening. By adding a different amount of copper or nickel and carbon content can be obtained by the different intensity. With CCT (Continuous Cooling Transformation) - graph, the cooling rate can be used to select the optimum composition.