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一、前言近年末,粉末冶金法广泛用于汽车、纺织机械、农业机械及其他机械零件的制造。粉末冶金机械零件最突出的优点是:原料粉末的利用率几乎为100％,制件的单件加工工时又少,费用低廉;用于滑动部分时,由于粉末合金的多孔性,能贮藏润滑油,所以又有良好的滑动性能;机械加工所不能制得的某些工件如凸轮和齿轮的组合件,用粉末冶金法可整体制出;压铸件等必须留有脱模斜度,而粉末冶金制件则不需要。
I. Introduction In recent years, the powder metallurgy method is widely used in automobile, textile machinery, agricultural machinery and other mechanical parts manufacturing. The most prominent advantages of powder metallurgy machinery parts are: the utilization rate of raw material powder is almost 100%, the working time of single piece of parts is small and the cost is low; when used for sliding part, the lubricating oil can be stored due to the porosity of powder alloy , So there are good sliding properties; Machining can not be made of some of the workpiece such as the cam and gear assembly, powder metallurgy can be made of the whole; Die Casting, etc. must have stripping slope, and powder metallurgy Parts do not need.