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一前言亚筛粉末指的是所有颗粒都能通过325目标准筛(44μ)的粉末. 粉末粒度、粒度分布、比表面、颗粒形状都属于粉末物性范围.由于它们直接关系到粉体的力学性能、物理性能及化学性能,因此它们是粉末体的重要性能指标.在粉末冶金中,粉末的上述物性不仅对生产工艺而且对产品质量都有极大的影响.在某种情况下这些物性关系到粉末流动性,充填压模的能力和压制密度.特别是硬质合金生产,由于制品不同对粒度要求亦不一样.硬质合金刀具,目前是依据刀具种类和
Introduction Sub-sieve powder refers to a powder that passes through a 325-mesh sieve (44 μ) for all particles. Particle size, particle size distribution, specific surface area and particle shape all fall within the physical properties of the powder. Since they are directly related to the mechanical properties of the powder , Physical properties and chemical properties, so they are important performance indicators of powders. In powder metallurgy, the above physical properties of powders have a great influence not only on the production process but also on the quality of the product. In some cases these properties relate to Powder flowability, the ability to fill the stamper and the density of the press. In particular, the production of cemented carbide, due to different products on the particle size requirements are not the same. Carbide cutting tools, is currently based on tool type and