1.1 本试验方法是为评定硬质合金的高应力耐磨性而开发的，但已成功用于硬度超过55洛氏硬度C标度（HRC）的陶瓷、金属陶瓷和金属基体硬质合金表面。该试验方法区别于其他磨损试验的特点是，用钢轮将磨料压在试样上，施加的力足以导致磨料颗粒破裂。一些磨损试验使用橡胶轮对试验表面施加磨料（试验方法 G65 和 G105 ). 橡胶轮产生低应力磨损，而钢轮产生高应力磨损。 1.2 总之，这是一项针对硬质材料的高应力实验室磨损试验，使用氧化铝颗粒的水泥浆作为研磨介质，并使用旋转钢轮迫使磨料穿过与浸入泥浆中的旋转轮直线接触的平面试样。 1.3 以国际单位制表示的数值应视为标准值。 1.3.1 例外情况- 小节 4.4 表1使用磨料粒度名称。括号中给出的值是基于筛网名称（规格）的标称尺寸，单位为微米 E11 )仅供参考。小节 6.2 使用洛氏硬度B标尺（HRB）作为硬度的标准测量单位。在里面 6.4 , 7.6 , 7.7 ，表1中，rpm是转速的标准测量单位。 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 从地壳中提取矿物通常需要使用金属制成的工具对岩石进行压裂，金属以某种方式被高硬度或耐磨材料包覆、覆盖或涂层，或两者兼有。钻孔、破碎和移动岩石涉及接触岩石表面的高应力磨损。应力高到足以压碎或破裂岩石。 该测试方法模拟了这种情况，并用于筛选适用于这些类型应用的新材料。它还可以用作高应力磨损应用材料的质量控制工具:泥浆泵、粉碎设备、回收切碎器、拆除设备等。 5.2 大多数磨损试验使用低应力磨损。磨料在测试期间保持相对完整。高应力磨损模拟磨料物质和工具/部件之间的力足以压碎磨料的应用。如果这描述了正在研究的应用，那么这可能是一种合适的测试方法。

1.1 This test method was developed for ranking the high-stress abrasion resistance of cemented carbides, but it has been successfully used on ceramics, cermets, and metal matrix hardfacings with a hardness over 55 Rockwell hardness, C scale (HRC). The feature of this test method that discriminates it from other abrasion tests is that the abrasive is forced against the test specimen with a steel wheel with sufficient force to cause fracture of the abrasive particles. Some abrasion tests use rubber wheels to force abrasive against test surfaces (Test Methods G65 and G105 ). A rubber wheel produces low-stress abrasion while a steel wheel produces high-stress abrasion. 1.2 In summary, this is a high-stress laboratory abrasion test for hard materials using a water slurry of aluminum oxide particles as the abrasive medium and a rotating steel wheel to force the abrasive across a flat test specimen in line contact with the rotating wheel immersed in the slurry. 1.3 The values stated in SI units are to be regarded as standard. 1.3.1 Exceptions— Subsection 4.4 and Table 1 use abrasive grit designations for particle size. The value given in parentheses is nominal dimension in micrometers based on sieve designation (Specification E11 ) and provided for information only. Subsection 6.2 uses the Rockwell hardness, B scale (HRB) as the standard unit of measure for hardness. In 6.4 , 7.6 , 7.7 , and Table 1, rpm is the standard unit of measure for rotational speed. 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 extraction of minerals from the Earth’s crust usually requires fracturing rock with tools made from metals, which have been clad, overlaid, or coated in some fashion with high hardness or wear-resistant materials, or both. Drilling, crushing, and moving rock involves high-stress abrasion on the surfaces that contact the rock. The stresses are high enough to crush or fracture the rock. This test method simulates this condition, and it is used to screen new materials for these types of applications. It can also be used as a quality control tool for materials destined for high-stress abrasion applications: slurry pumps, comminution equipment, recycling choppers, demolition equipment, etc. 5.2 Most abrasion tests use low-stress abrasion. The abrasive stays relatively intact during testing. High-stress abrasion simulates applications where the force between an abrasive substance and a tool/component will be high enough to crush the abrasive. If this describes an application under study, then this may be an appropriate test method to use.