1.1 本试验方法涵盖了定量测定特定体积自由流动金属粉末或润滑粉末混合物流速的实验室程序。 1.2 单位- 除了质量、体积和密度的值外，使用克和立方厘米单位是长期的行业惯例，以英寸-磅单位表示的值应视为标准值。括号中给出的值是数学转换为SI单位，仅供参考，不被视为标准单位。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 体积流量是金属粉末流动特性的测量值。与单位质量流量相比，按体积测量流量消除了粉末密度的变化，并与按体积填充模具的生产实践相关。 5.2 粉末流动和堆积的能力是颗粒间摩擦的函数。随着表面积的增加，粉末质量中的摩擦量也增加。因此，颗粒之间的摩擦力增加，导致流动和填料效率降低。 5.3 了解体积流率后，零件生产商可以估算每小时可压实的零件数量。 5.4 该测试可能是金属粉末生产商和粉末冶金（PM）零件生产商之间采购协议的一部分，也可能是任何使用金属粉末的公司的内部质量控制测试。

1.1 This test method covers a laboratory procedure for the quantitative determination of the flow rate of a specific volume of a free-flowing metal powder or lubricated powder mixture. 1.2 Units— With the exception of the values for mass, volume, and density, for which the use of the gram and the cubic centimetre unit is long-standing industry practice, the values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The volumetric flow rate is a measure of the flow characteristics of a metal powder. Measuring flow by volume compared with flow per unit mass eliminates the variable of the powder density and relates to the production practice of die filling by volume. 5.2 The ability of a powder to flow and pack is a function of interparticle friction. As the surface area increases, the amount of friction in a powder mass also increases. Consequently, the friction between particles increases, giving less efficient flow and packing. 5.3 Knowledge of the volumetric flow rate permits the part producer to estimate the number of parts that can be compacted per hour. 5.4 This test may be part of the purchase agreement between metal powder producers and powder metallurgy (PM) part producers, or it can be an internal quality control test for any company using metal powders.