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前言粉末冶金是一种新兴的技术,是经过制粉、压型和烧牿而做成各种制品的一种工艺。其优点如下:1.不经熔炼和铸造,可以少切削或不切削做成制品,从而提高劳动生产率。节省工时,节约大量原材料。2.可控制的金属材料孔隙度。一般金属材料是緻密无孔隙的,密度是个常数,如 Fe 为7.8克/厘米~3,Cu 为8.9克/厘米~3,其性能只取决于成份和金相组织。粉末冶金制品,可按人为需要做成不同的孔隙度,孔隙度可大可小,甚至没有。3.可以解决一般熔炼方法所难以办到的特殊材料制造问题,如工程机械上离合器片,刹车带等摩擦材
Preface Powder metallurgy is an emerging technology that is a process of making a variety of products through milling, press molding, and burning. The advantages are as follows: 1. Without melting and casting, can be less or no cutting made of products, thereby enhancing labor productivity. Save working hours, save a lot of raw materials. 2. Controllable metal porosity. The general metal material is dense and non-porous, the density is a constant, such as Fe 7.8 g / cm ~ 3, Cu 8.9 g / cm ~ 3, its performance depends only on the composition and microstructure. Powder metallurgy products, according to human needs can be made of different porosity, porosity can be large or small, or even not. 3. Can solve the general melting methods difficult to handle the manufacture of special materials, such as construction machinery on the clutch plate, brake pads and other friction materials