钼粉物理性能对其压坯挠曲强度的影响

摘要

The flexural strength of molybdenum compacts is one of the important properties of molybdenum powder. The effects of particle size distribution, fisher particle size, bulk density, tap density and particle morphologies of molybdenum powder on the flexural strength of molybdenum compacts are analyzed. The flexural strength of molybdenum compacts depends on the particle morphologies and size distribution of molybdenum powder. The larger bulk density and tap density of molybdenum powder, the smaller particle aggregation. The particle size distribution is close to the standard normal distribution with high valued flexural strength compacts.%钼压坯的挠曲强度是衡量钼粉质量的重要指标之一。通过对钼粉的粒度分布、费氏粒度、松装密度、振实密度以及颗粒形貌等对钼压坯挠曲强度的影响研究，探讨其相互关系，有利于产品质量管理前置。研究结果表明，钼压坯的挠曲强度值的大小取决于钼粉的颗粒团聚状况和粒度分布；钼粉的松装密度和振实密度越大，钼粉中小颗粒聚集和颗粒熔融形成的“硬”团聚越少，粒度分布越接近标准正态分布，所得压坯的挠曲强度值则高。