1.1 本试验方法包括使用霍尔流量计漏斗测定金属粉末和粉末混合物的流速。它仅适用于无需借助霍尔流量计漏斗流动的粉末。 1.2 单位- 除用于确定密度的密度值和质量值外，使用克每立方厘米（g/cm 3. )而克（g）单位是长期存在的行业惯例，英寸-磅单位的数值应视为标准。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户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 模腔填充的速率和均匀性与流动特性有关，从而影响压实零件的生产率和均匀性。 5.2 粉末的流动能力是粒子间摩擦的函数。 随着粒子间摩擦的增加，流动速度减慢。细粉末可能不流动。一些粉末，通常是细粉末和润滑粉末混合物，可能不会流过霍尔流量计漏斗。然而，如果提供了更大的孔口，例如在试验方法的卡尼流量计漏斗中 B964 ，可以确定有意义的流速，为某些应用提供特定信息。 5.3 试验方法 B213页 使用霍尔流量计漏斗是测定金属粉末和粉末混合物流动性的首选方法。卡尼流量计试验方法漏斗 B964 应仅在粉末不会流过霍尔流量计漏斗时使用。 5.4 湿度和含水量影响流速。潮湿或潮湿的粉末可能不会流动。 5.5 这些测试方法基于规定质量粉末的流量。如果首选特定体积的粉末流动，则试验方法 B855 可用于容易流过霍尔流量计漏斗的粉末。 5.6 该测试方法可以是粉末制造商和粉末冶金（PM）零件制造商之间采购协议的一部分，也可以是制造商或最终用户进行的内部质量控制测试。

1.1 This test method covers the determination of a flow rate, by the use of the Hall Flowmeter funnel of metal powders and powder mixtures. It is suitable only for those powders that will flow unaided through the Hall Flowmeter funnel. 1.2 Units— With the exception of the values for density and the mass used to determine density, for which the use of the gram per cubic centimetre (g/cm 3 ) and gram (g) units is the long-standing industry practice, the values 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 rate and uniformity of die cavity filling are related to flow properties, which thus influence production rates and uniformity of compacted parts. 5.2 The ability of a powder to flow is a function of interparticle friction. As interparticle friction increases, flow is slowed. Fine powders may not flow. Some powders, often fine powders and lubricated powder mixtures, may not flow through the Hall Flowmeter funnel. Nevertheless, if a larger orifice is provided, such as in the Carney Flowmeter funnel of Test Methods B964 , a meaningful flow rate may be determined, providing specific information for certain applications. 5.3 Test Methods B213 , using the Hall Flowmeter funnel, are the preferred methods for determining the flowability of metal powders and powder mixtures. The Carney Flowmeter funnel of Test Methods B964 should only be used when powder will not flow through the Hall Flowmeter funnel. 5.4 Humidity and moisture content influence flow rate. Wet or moist powders may not flow. 5.5 These test methods are based on flow of a specified mass of powder. If flow of a specific volume of powder is preferred, Test Method B855 may be used for powders that flow readily through the Hall Flowmeter funnel. 5.6 This test method may be part of the purchase agreement between powder manufacturers and powder metallurgy (PM) part producers, or it can be an internal quality control test by either the producer or the end user.