1.1 本标准涵盖了一种测试方法，该方法可用于测量由润滑或非润滑金属粉末或粉末混合物制成的压实但未烧结（绿色）试样的横向断裂强度。 1.2 绿色强度通过定量实验室程序测量，其中断裂强度是根据在受控条件下承受均匀增加的三点横向载荷时，支撑为简支梁的未烧结试样断裂所需的力计算得出的。 1. 3. 本试验方法是试验方法的配套标准 B528 这包括烧结粉末冶金试样横向断裂强度的测量。 1.4 单位- 除用于确定密度的密度和质量值外，使用克每立方厘米（g/cm 3. )而克（g）单位是长期的行业惯例，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。 1.5 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。 1.6 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《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 在本试验方法规定的条件下确定的生坯强度值受粉末特性、粉末在规定条件下的压实方式（即压实后存在的颗粒间粘合）和所用润滑系统的影响。 5.2 绿色强度值的知识有助于金属粉末的生产、表征和利用，以制造粉末冶金结构零件和轴承。 5.3 压实金属粉末的生坯强度试验可用于: 5.3.1 将压坯的阻力与因搬运造成的破损或损坏联系起来。 5.3.2 比较不同批次的金属粉末或粉末混合物的质量。 5.3.3 确定向基础粉末中添加润滑剂或其他粉末的效果。 5.3.4 评估粉末混合或混合变量。 5.4 已知影响金属粉末生坯强度的因素有颗粒形状、粒度分布和金属粉末的可压缩性。 5.5 润滑剂或其他添加剂的数量和类型以及混合程序对由金属粉末混合物制成的试样的生坯强度有很大影响。

1.1 This standard covers a test method that may be used to measure the transverse rupture strength of a compacted but unsintered (green) test specimen produced from lubricated or unlubricated metal powders or powder mixtures. 1.2 Green strength is measured by a quantitative laboratory procedure in which the fracture strength is calculated from the force required to break an unsintered test specimen supported as a simple beam while subjected to a uniformly increasing three-point transverse load under controlled conditions. 1.3 This test method is a companion standard to Test Method B528 that covers the measurement of the transverse rupture strength of sintered PM test specimens. 1.4 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 centimeter (g/cm 3 ) and gram (g) units is the longstanding 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. 1.5 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 ====== 5.1 The green strength value determined under the conditions specified by this test method is influenced by the characteristics of the powder, how it compacts under the specified conditions (that is, the particle to particle bonding that exists following compacting), and the lubrication system used. 5.2 Knowledge of the green strength value is useful to the production, characterization, and utilization of metal powders in the manufacture of PM structural parts and bearings. 5.3 The test for green strength of a compacted metal powder can be used to: 5.3.1 Relate the resistance of a pressed compact to breakage or damage due to handling. 5.3.2 Compare the quality of a metal powder or powder mixture from lot to lot. 5.3.3 Determine the effect of the addition of a lubricant or other powders to a base powder. 5.3.4 Evaluate powder mixing or blending variables. 5.4 Factors that are known to influence the green strength of a metal powder are particle shape, particle size distribution, and compressibility of the metal powder. 5.5 The amount and type of lubricant or other additives and the mixing procedures have a strong effect on the green strength of specimens produced from metal powder mixtures.