1.1 本试验方法涵盖一个实验室程序，可用于开发数据，从中可以确定任何泥浆的相对耐磨性（米勒数）或不同材料对不同泥浆的耐磨性（SAR数）的响应。 1.2 通过该程序获得的试验数据用于计算与重复标准形状27的质量损失率相关的数字 % 在相关泥浆中运行一段时间时，铬铁磨损块（米勒数），或计算与任何相关材料的复制标准形状磨损试样在任何相关泥浆中运行一段时间时的质量损失率（转换为体积损失）相关的数字（SAR数）。 1.3 对于SAR数测试，要求试样上有一个加工平整的磨损表面，这可能会妨碍应用薄（0。 051 毫米至0.127 硬耐磨涂层不允许进行表面处理。6 h合成孔径雷达数测试的总持续时间可能不允许建立未完成表面的一致质量损失率。 1.4 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。 1.5 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 米勒数 5. 是泥浆相对耐磨性的指数。其主要目的是根据标准参考材料的磨损情况对泥浆的耐磨性进行排名。随着米勒数的增加，标准耐磨块上的磨损损坏更严重。 5.2 SAR数是在任何特定的相关泥浆中测试的材料的相对磨损响应指数。SAR数是Miller数的广义形式，适用于除用于测定Miller数的参考材料外的其他材料。主要目的是对用于特定泥浆的泵送和流体处理设备的系统中使用的建筑材料进行分级。它还可用于根据任何选定的建筑材料对各种泥浆的耐磨性进行排名，而不是为米勒数测定指定的参考材料。 随着合成孔径雷达数的增加，被测材料试样上的泥浆损伤更严重。 5.3 经验表明，Miller数或SAR数约为50或更低的泥浆可以泵送，对系统造成轻微磨损。超过50时，必须遵守预防措施，预计磨损会造成更大的损坏。因此，Miller数和SAR数提供了有关泥浆或材料的信息，这些信息可能有助于选择泵和其他设备，并预测所涉及泵的液体端部件的预期寿命。 5.4 SAR数可用于确定某些泥浆系统的最合适材料。

1.1 This test method covers a single laboratory procedure that can be used to develop data from which either the relative abrasivity of any slurry (Miller Number) or the response of different materials to the abrasivity of different slurries (SAR Number), can be determined. 1.2 The test data obtained by this procedure is used to calculate either a number related to the rate of mass loss of duplicate standard-shaped 27 % chromium iron wear blocks when run for a period of time in the slurry of interest (Miller Number), or to calculate a number related to the rate of mass loss (converted to volume loss) of duplicate standard-shaped wear specimens of any material of interest when run for a period of time in any slurry of interest (SAR Number). 1.3 The requirement for a finished flat wearing surface on the test specimen for a SAR Number test may preclude application of the procedure where thin (0.051 mm to 0.127 mm), hard, wear-resistant coatings will not allow for surface finishing. The 6 h total duration of the SAR Number Test may not allow establishment of a consistent rate-of-mass-loss of the unfinished surface. 1.4 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. 1.5 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 Miller Number 5 is an index of the relative abrasivity of slurries. Its primary purpose is to rank the abrasivity of slurries in terms of the wear of a standard reference material. The wear damage on the standard wear block is worse as the Miller Number gets higher. 5.2 The SAR Number is an index of the relative abrasion response of materials as tested in any particular slurry of interest. The SAR Number is a generalized form of the Miller Number applicable to materials other than the reference material used for the Miller Number determination. A major purpose is to rank construction materials for use in a system for pumping and fluid handling equipment for a particular slurry. It can also be used to rank the abrasivity of various slurries against any selected construction material other than the reference material specified for a Miller Number determination. The slurry damage on the specimen of material being tested is worse as the SAR Number gets higher. 5.3 Experience has shown that slurries with a Miller Number or a SAR Number of approximately 50 or lower can be pumped with minor abrasive damage to the system. Above a number of 50, precautions must be observed and greater damage from abrasion is to be expected. Accordingly, the Miller Number and the SAR Number provide information about the slurry or the material that may be useful in the selection of pumps and other equipment and to predict the life expectancy of liquid-end parts of the pumps involved. 5.4 The SAR Number can be used to determine the most suitable materials for certain slurry systems.