1.1 本试验方法涵盖了一种金相程序，用于测定粉末锻造低合金钢材料中合金铁或非合金铁污染的百分比，以及粉末锻造铁和碳钢材料中合金铁污染的百分比。 1.2 单位- 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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 当合金钢粉末在与铁粉相同的设备中加工时，就会发生交叉污染。 5.2 非合金铁颗粒在热处理后可能不会硬化，因此是低合金钢零件中软点的潜在来源。 5.3 合金铁颗粒具有比铁或碳钢基体更高的淬透性，是硬点的潜在来源。 5.4 硬点或软点可能会导致维修或加工中出现问题。 5.5 试验结果可用于根据买方和制造商之间商定的指南对装运零件进行鉴定，或用于检查粉末锻造用混合物的适用性。

1.1 This test method covers a metallographic procedure for determining the percentage of alloyed or unalloyed iron contamination present in powder forged low-alloy steel materials and the percentage of alloyed iron contamination in powder forged iron and carbon steel materials. 1.2 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 Cross-product contamination occurs whenever alloy steel powders are processed in the same equipment as iron powders. 5.2 Unalloyed iron particles, because they may not harden upon heat treatment, are a potential source of soft spots in low-alloy steel parts. 5.3 Alloyed iron particles, having higher hardenability than an iron or carbon steel matrix, are a potential source of hard spots. 5.4 Hard or soft spots may cause problems in service or machining. 5.5 The results of the tests may be used to qualify parts for shipment in accordance with guidelines agreed between purchaser and manufacturer or to check the suitability of mixes for use in powder forging.