标准摘要
[中文适用范围]： 本部分ISO 18549描述了两种方法，用于测定基于铁或钢粉末的加热粉末混合物（用于温压成型）通过具有给定孔径的漏斗所需的时间（流速）。方法A使用孔径为2.5毫米的漏斗和50克试样，在很大程度上基于ISO 4490中标准化的方法。该方法仅适用于在加热条件下能自由通过2.5毫米孔径的粉末混合物。方法B使用孔径为5毫米的漏斗和150克试样。两种方法均覆盖60°C至180°C的测试温度范围，双方协商后可选择其中任何一种。 [外文原描述]： ISO 18549-2:2009 describes two methods for the determination of the time (flow rate) it takes for a given quantity of a heated powder mix, based on iron or steel powders and to be used for warm compaction, to pass through a funnel with a given orifice diameter. Method A uses a funnel with an orifice of 2,5 mm and a test portion of 50 g and is, to a large extent, based on the method standardized in ISO 4490:2008. The method can only be used for powder mixes that flow freely through the 2,5 mm orifice in the heated condition. Method B uses a funnel with an orifice of 5 mm and a test portion with a size of 150 g. Both methods cover a testing temperature range of 60 °C to 180 °C and either of them can be selected after agreement between the parties involved.
英文名称Metallic powders — Determination of apparent density and flow rate at elevated temperatures — Part 2: Determination of flow rate at elevated temperatures