1.1 本试验方法包括通过试验机测定摩擦接触中自润滑材料的磨损率和摩擦系数 2. 采用止推垫圈样本配置。 注1: 该机器也可用于测量摩擦系数。 1.2 以国际单位制为单位的数值将被视为标准。如果材料、产品或设备仅以英寸-磅为单位，则括号中的国际单位制数值仅供参考。 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。 1.4 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====== 4.1 该试验方法用于确定在有用的操作条件下，即压力和速度组合低于 光伏 （压力 × 速度）试验材料的极限。本试验方法的使用者应自行确定本试验程序的结果是否与现场性能或其他台架试验机相关。如果试验条件改变，磨损率可能会改变，一种材料相对于另一种材料的相对值也可能会改变。 4.2 测试条件可从中选择 表1 . （A） 对于许多应用，磨损率超过1.0 × 10 − 5. 在中/h（2.5 × 10 − 7. m/h）被认为过高。一些常用材料在不同温度下的典型磨损率 光伏 级别为: 缩醛均聚物 光伏 1. : 5. × 10 − 6. 在中/h到1 × 10 − 5. 在中/h（1.3 × 10 − 7. 米/小时至2.5 × 10 − 7. 米/小时） 缩醛均聚物 光伏 2. : 1. × 10 − 5. 在中/h到3 × 10 − 5. 在中/h（2.5 × 10 − 7. 米/小时至7.5 × 10 − 7. 米/小时） 22 % PTFE填充的缩醛均聚物 光伏 2. : 3. × 10 − 6. 在中/h至6 × 10 − 6. 在中/h（7.5 × 10 − 8. 米/小时至1.5 × 10 − 7. 米/小时） 聚酰胺（6-6型） 光伏 2. : 1. × 10 − 5. 在中/h至5 × 10 − 5. 在中/h（2.5 × 10 − 7. 米/小时至1.3 × 10 − 6. 米/小时） 15 % 石墨填充聚酰亚胺树脂 光伏 3. : 1. × 10 − 5. 在中/h到2 × 10 − 5. 在中/h（2.5 × 10 − 7. 米/小时至5 × 10 − 7. 米/小时） 4.3 磨损测量的精度与试验持续时间或磨损量相对独立，但磨损率（计算）的精度随试验持续时间和磨损量的增加而提高。一般认为，有用的磨损率精度要求选择足以产生0.1的试验持续时间 毫米（0.004 英寸。）磨损。测试持续时间通常为50 h至4000 h范围。

1.1 This test method covers the determination of wear rate and coefficient of friction for self-lubricated materials in rubbing contact by a testing machine 2 that utilizes a thrust washer specimen configuration. Note 1: This machine may also be used to measure coefficient of friction. 1.2 The values in SI units are to be regarded as the standard. In cases where materials, products, or equipment are available only in inch-pound units, SI values in parentheses are for information only. 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 ====== 4.1 This test method is used to determine the equilibrium rate of wear and coefficient of friction of materials in rubbing contact under useful operating conditions, that is, combinations of pressure and velocity that fall below the PV (pressure × velocity) limit of the test material. The user of this test method should determine to his own satisfaction whether the results of this test procedure correlate with field performance or other bench test machines. If the test conditions are changed, the wear rates may change and the relative value of one material with respect to another may also change. 4.2 Test conditions may be selected from Table 1 . (A) For many applications a wear rate exceeding 1.0 × 10 − 5 in./h (2.5 × 10 − 7 m/h) is considered excessive. Typical wear rates for some commonly used materials at different PV levels are: Acetal homopolymer at PV 1 : 5 × 10 − 6 in./h to 1 × 10 − 5 in./h (1.3 × 10 − 7 m/h to 2.5 × 10 − 7 m/h) Acetal homopolymer at PV 2 : 1 × 10 − 5 in./h to 3 × 10 − 5 in./h (2.5 × 10 − 7 m/h to 7.5 × 10 − 7 m/h) 22 % PTFE-filled acetal homopolymer at PV 2 : 3 × 10 − 6 in./h to 6 × 10 − 6 in./h (7.5 × 10 − 8 m/h to 1.5 × 10 − 7 m/h) Polyamide (Type 6-6) at PV 2 : 1 × 10 − 5 in./h to 5 × 10 − 5 in./h (2.5 × 10 − 7 m/h to 1.3 × 10 − 6 m/h) 15 % graphite filled polyimide restin at PV 3 : 1 × 10 − 5 in./h to 2 × 10 − 5 in./h (2.5 × 10 − 7 m/h to 5 × 10 − 7 m/h) 4.3 The precision of wear measurement is relatively independent of test duration or amount of wear, but the precision of wear rate (calculation) improves with test duration and amount of wear. It is generally believed that useful wear rate precision requires the selection of a test duration sufficient to produce 0.1 mm (0.004 in.) of wear. Test durations will often be in the 50 h to 4000 h range.