1.1 本试验方法包括对材料偶的耐磨性进行分级的实验室试验。大多数磨损研究都是在裸金属和合金上进行的；然而，非金属材料、涂层和表面改性合金也可以通过该测试方法进行评估。 1.2 本试验方法不用于评估润滑条件下滑动的材料偶的磨损阻力，因为使用本试验方法在润滑滑动条件下通常不会发生磨损。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 5.1 该试验方法旨在对材料偶对磨损引起的失效模式的抵抗力进行分级，而不仅仅是对滑动表面的表面外观进行分类。 5.2 当损坏（磨损）的表面使部件无法使用时，应考虑此测试方法。经验表明，磨损在移动缓慢且间歇性运行的滑动系统中最为普遍。 螺纹部件的磨损和咬合是该测试方法最接近模拟的一个经典示例。 5.3 其他易磨损的例子包括:阀内件的密封表面可能因磨损而过度泄漏；以及可能由于磨损而失效的泵磨损环。 5.4 如果设备继续令人满意地运行并逐渐减小尺寸，则应通过不同的测试来评估机械磨损，如交叉圆柱测试方法（见测试方法 G83 )。链条皮带销和衬套就是此类问题的例子。 5.5 该试验方法不应用于定量或最终设计目的，因为许多环境因素会影响使用中材料的磨损性能。 润滑、对齐、刚度和几何形状只是影响材料性能的一些因素。事实证明，这种测试方法在筛选更接近实际使用条件的原型测试材料方面很有价值。

1.1 This test method covers a laboratory test which ranks the galling resistance of material couples. Most galling studies have been conducted on bare metals and alloys; however, non-metallics, coatings, and surface modified alloys may also be evaluated by this test method. 1.2 This test method is not designed for evaluating the galling resistance of material couples sliding under lubricated conditions because galling usually will not occur under lubricated sliding conditions using this test method. 1.3 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. 1.4 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 This test method is designed to rank material couples in their resistance to the failure mode caused by galling and not merely to classify the surface appearance of sliding surfaces. 5.2 This test method should be considered when damaged (galled) surfaces render components non-serviceable. Experience has shown that galling is most prevalent in sliding systems that are slow moving and operate intermittently. The galling and seizure of threaded components is a classic example which this test method most closely simulates. 5.3 Other galling-prone examples include: sealing surfaces of value trim which may leak excessively due to galling; and pump wear rings that may function ineffectively due to galling. 5.4 If the equipment continues to operate satisfactorily and loses dimension gradually, then mechanical wear should be evaluated by a different test such as the crossed cylinder Test Method (see Test Method G83 ). Chain belt pins and bushings are examples of this type of problem. 5.5 This test method should not be used for quantitative or final design purposes since many environmental factors influence the galling performance of materials in service. Lubrication, alignment, stiffness and geometry are only some of the factors that can affect how materials perform. This test method has proven valuable in screening materials for prototypical testing that more closely simulates actual service conditions.