粉末冶金零件需要的高性能润滑剂

High Performance lubricants for demanding pm applications

目前粉末冶金零件产业要解决的主要问题是：在合理降低成本的情况下生产高密度零件。生产高密度零件的工艺方法有很多种，其中包括零件的成形工艺和烧结技术。特别是，像温压与模壁润滑之类的一次压制工艺。这种工艺依据粉末的组成，生坯密度可达到的范围为7．2～7．5g·cm^-3。尽管如此，和传统压制工艺相比，这些压制工艺一般都需要严密控制，费用也相对较高，还有可能减小生产率。为了能让冷压制或控制温度的阴模压制达到较高的生坯密度，最近开发了一些新的高性能润滑剂。本文介绍了这些新开发的高性能润滑剂在试验室与大量生产中得出的生坯与烧结件特性。特别对这些新润滑剂和其他常规润滑剂的压制与脱出特性进行了对比。

The achievermnt of high density at reasonable cost is without a doubt one of the major ques of the P/M industry. Hish density can be achieved through various processing mutes involving the shaping of the part and/or the sintering. In particular, single pressing methods such as warm compaction and die wall lubrication are known to give green density in the range of 7.2 to 7.5 g · cm-3 depening on the powder formulation. Nevertheless, these pressing techniques normally require tighter control, are costly and may reduce productivity compared to conventional pressing method. More recently, new high perfonmnce lubricants were developed to achieve higher green density than conventional lubricant by cold compaction or temperature - controlled die compaction. This paper presents the green and sintered characteristics ofthese newly developed high performance lubricants in a laboratory and production scale. In particular,the compaction and ejection characteristics of these new lubricants ale compared to that obtained with other conventional lubricants.