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，在该程序中，断裂强度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。 1.3本试验方法是试验方法B 528的配套标准 这包括烧结粉末冶金试样横向断裂强度的测量。 1.4密度值除外，其g/cm 3. 单位是行业标准，质量测量用于计算密度，以英寸-磅单位表示的值将被视为标准。括号中所示的SI等效值已根据IEEE/ASTM标准SI 10进行了转换 ，可能是近似值，仅供参考。 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和健康实践，并确定监管限制的适用性。 ^参考: ASTM标准: B 215 金属粉末取样规程 B 243 粉末冶金术语 B 528 金属粉末试样横向断裂强度的试验方法 B 925 粉末冶金（PM）试样的生产和制备规程 B 962 用阿基米德原理测定压实或烧结粉末冶金产品密度的试验方法 E 691 进行实验室间研究以确定试验方法精度的实施规程 SI 10 使用国际单位制（SI）的美国国家标准:现代公制 ^关键词:^状态:Dn Cn Sn Nn Mn^批准:20090501^页码:6^委员会:B09^小组委员会:0200^ BOS:02.05^组织信息:ISO^行动:STDU修订版^ MISCPUB:^ PDESIG:B0312^ PYEAR:2009^类别:测试方法 ====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的影响，以及粉末在规定条件下的压实方式（i。 e、 ，压实后存在的颗粒间粘合），以及所使用的润滑系统。 5.2绿色强度值的知识有助于粉末冶金结构零件和轴承制造中金属粉末的生产、表征和利用。 压实金属粉末的生坯强度试验可用于: 将压坯的阻力与因搬运造成的破损或损坏联系起来。 比较不同批次的金属粉末或粉末混合物的质量。 确定向基础粉末中添加润滑剂或其他粉末的效果。 评估粉末混合或混合变量。 已知影响金属粉末生坯强度的因素是金属粉末的颗粒形状、粒度分布和压缩性。 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 B 528 that covers the measurement of the transverse rupture strength of sintered PM test specimens. 1.4 With the exception of density values, for which the g/cm 3 unit is the industry standard, and mass measurements used to calculate density, the values stated in inch-pound units are to be regarded as the standard. The SI equivalents shown in parentheses have been converted in accordance with IEEE/ASTM Standard SI 10 , may be approximate and are only included for information. 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 and health practices and determine the applicability of regulatory limitations prior to use. ^REFERENCE: ASTM Standards: B 215 Practices for Sampling Metal Powders B 243 Terminology of Powder Metallurgy B 528 Test Method for Transverse Rupture Strength of Metal Powder Specimens B 925 Practices for Production and Preparation of Powder Metallurgy (PM) Test Specimens B 962 Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes’ Principle E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method SI 10 American National Standard for Use of the International System of Units (SI): The Modern Metric System ^KEYWORDS: ^STATUS: Dn Cn Sn Nn Mn ^APPROVAL: 20090501 ^PAGES: 6 ^COMMITTEE: B09 ^SUBCOMMITTEE: 0200 ^BOS: 02.05 ^ORGINFO: ISO ^ACTION: STD_REVISION ^MISCPUB: ^PDESIG: B0312 ^PYEAR: 2009 ^CLASS: Test Method ====== 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 (i.e., 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. The test for green strength of a compacted metal powder can be used to: Relate the resistance of a pressed compact to breakage or damage due to handling. Compare the quality of a metal powder or powder mixture from lot to lot. Determine the effect of the addition of a lubricant or other powders to a base powder. Evaluate powder mixing or blending variables. 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.