最近二十年间,曾经提出了几种可供选择的普通不润滑的正挤压方法,以获得较高的生产率和更均匀的组织。它们对于硬铝合金来说是非常重要的。为了很好地进行评价,铝加工厂需要了解用其中每种普通挤压方法能生产什么种类,在毛坯制备、润滑、工具和设备上所需的额外费用以及整个过程最终增加的情况。有些资料不易获得,因此,需要在这些方面作更多的研究。 In the last two decades, several general non-lubricated positive extrusion methods have been proposed for higher productivity and more uniform organization. They are very important for hard aluminum alloys. For a good evaluation, the aluminum plant needs to know what kind of crush can be produced with each of these common crush methods, the additional costs required in stock preparation, lubrication, tools and equipment, and the eventual increase in the overall process. Some information is not readily available and therefore more research is needed in these areas.