1.1 本指南提供了粉末床添加剂制造（AM）-粉末床熔化和金属粘合剂喷射中使用的金属粉末原料的扩散行为或扩散性的定义。根据粉末床特性参数进行了定义，并提出了可用于测量这些参数的测量方法。 1.2 本标准适用于粉末床AM中使用的粉末原料的生产商和用户，以提供对可扩展性参数的共同理解。这些参数可作为制定粉末规范的基础，以确保适当的粉末铺展性。 1.3 本指南通过提供量化粉末床铺展性的可能技术，并强调可能影响该铺展性可能的工艺参数，为AM机器的制造商和用户提供指导。这些参数可作为制定工艺规范和制定措施的基础，以提高AM工艺中可扩展性的质量。 1.4 以SI单位表示的值应视为标准单位。本标准不包括其他测量单位。 1.5 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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 本指南的总体目的是提供关于粉末床AM的可扩展性的共同理解。 本指南概述了可扩展性参数和可用于测量这些参数的测量方法。这些参数可作为制定粉末床工艺规范的基础。

1.1 This guide provides definitions of the spreading behavior or spreadability of metal powder feedstock used in powder bed additive manufacturing (AM) – Powder Bed Fusion and Metal Binder Jetting. Definitions are made in terms of powder bed characteristic parameters, and suggests measurement methods that could be used to measure these parameters. 1.2 This standard is intended for the producers and users of powder feedstock used in powder bed AM to provide a common understanding of spreadability parameters. These parameters can be used as the basis for developing powder specifications that ensure proper powder spreadability. 1.3 This guide provides guidance to manufacturers and users of AM machines by providing possible techniques to quantify powder bed spreadability, and highlighting possible process parameters that may affect this spreadability. These parameters can be used as the basis for developing process specifications and for developing measures to improve the quality of spreadability in AM processes. 1.4 The values stated in SI units are to be regarded as the standard units. No other units of measurement are included in this standard. 1.5 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. 1.6 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 ====== 4.1 The overall aim of this guide is to provide a common understanding of spreadability in relation to powder bed AM. This guide provides an overview of spreadability parameters and measurement methods that could be used to measure these parameters. These parameters could be used as the basis to develop process specifications for the powder bed.