1.1 本试验方法包括测定粉末锻造低合金钢材料中合金或非合金铁污染百分比以及粉末锻造铁和碳钢材料中合金铁污染百分比的金相方法。 1.2 单位- 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.4 本国际标准是根据世界贸易组织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的标准化原则制定的加州贸易壁垒委员会。 ======意义和用途====== 5.1 每当合金钢粉末与铁粉末在同一设备中加工时，就会发生交叉产品污染。 5.2 非合金铁颗粒，因为它们在热处理时可能不会硬化，是低合金钢零件中软点的潜在来源。 5.3 具有比铁或碳钢基体更高淬透性的合金铁颗粒是硬点的潜在来源。 5.4 硬点或软点可能会导致维修或加工中的问题。 5.5 测试结果可用于根据买方和制造商之间商定的指南确定零件的装运资格，或检查粉末锻造中使用的混合物的适用性。

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.