用温压制造汽车变速器输出轴毂

汽车中应用的铁基粉末冶金零件在不断增加,这主要是由于密度的增高和动态性能的改进。粉末冶金零件的新应用还必须通过不断采用新工艺的最终形成形能力及减少制造工序,降低生产成本。用于制造某些新零件的生产工艺,还必须能生产出几何形状复杂的薄壁零件。采用温压工艺(ANCORDENSETM),用一次压制可达到较高密度水平。这种工艺还能增高生坯强度与减小脱模力。汽车变速器输出轴毂在20世纪90年代以前,是用二次压制/二次烧结工艺大量生产的一个重要粉末冶金零件。1995年前后,用温压工艺进行了制造这种零件的试验,并和用二次压制/二次烧结工艺生产的零件进行了对比。

PROUCTION OF THE AUTOMOTIVE TRANSMISSION OUTPUT SHAFT HUB BY WARM COWPACTION PROCESS

The continued growth of ferrous powder metallurgy in automotive applications is dependent on the development of higher density and improved dynamic properties.New powder metallurgy applications also must be cost effective through the continued use of the process’s,net shape forming capabilities and a reduced number of manufacturing steps.The processes utilized to manufacture some of these new parts also must provide the ability to produce thin walled parts with complex geometries.The use of the warm compaction process(ANCORDENSETM) will be shown to develop high density levels with a single compaction process.The process also provides increased green strength and reduced ejection forces.The dependence of mechanical properties on density will be demonstrated.An example of a potential application of the warm compaction technology is an outputshaft.The capability of manufacturing this part with the warm compaction process is outlined and compared with the same part made by the double press/double sinter(DPDS) process.Part density and performance from both processes are compared.