1.1 该试验方法涵盖了使用扭转压缩试验（TCT）测定材料在平面滑动下的摩擦系数（COF）和粘附阻力的实验室程序。该测试方法根据COF及其附着力对材料对、表面处理、涂层和润滑剂组合进行排名。 1.2 报告材料在试验条件下粘附的时间，并用于量化摩擦副的粘附阻力和对磨损或擦伤的易感性。具有更高附着力的系统将提供更长的时间直到失效。 1.3 记录在达到全试验压力的试验和开始粘附的时间或在预定时间段内运行的试验结束之间的平均摩擦系数值。 系统是根据它们在粘附发生之前的平均摩擦系数进行排名的。 1.4 单位- 以国际单位制表示的数值应视为标准。除表1中的磅/平方英寸和磅外，本标准中不包括其他计量单位。 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。 1.6 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 该试验方法旨在通过CFT对材料偶、表面处理和润滑剂进行评级，并对其耐粘着磨损性进行评级。由于粘着磨损是一种复杂的现象，本质上是随机的，因此必须对表面进行评估，以确认是否存在粘着。 5.2 在评估易发生粘着磨损的工艺或应用变化的影响时，应考虑该测试方法，包括刻痕、擦伤和犁削的任何组合。这些失效模式通常发生在滑动接触下、高接触应力下，以及在适用的情况下，在润滑剂不足的情况下。 5.3 TCT通常用于评估材料偶、表面处理、涂层和润滑剂在金属加工操作（包括深冲、挤压和管道弯曲）中防止或减少粘合剂磨损的能力。 测试可能有效的其他应用包括装载机铲斗衬套、启动时的齿轮齿和低间隙泵。 5.4 此测试方法最好用作比较筛选工具。TCT产生的性能排名与许多应用中的排名密切相关。 3. 然而，由于该试验是台架试验，而不是直接再现任何特定应用，因此TCT结果应仅用作粘合剂磨损趋势的指标。TCT是一种有用的筛选测试，用于在工艺测试和现场试验之前比较材料偶、表面处理、涂层和润滑剂配方的有效性。

1.1 This test method covers laboratory procedures for determining the coefficient of friction (COF) and resistance of materials to adhesion under flat sliding using the twist compression test (TCT). This test method ranks material couples, surface treatments, coatings, and lubricant combinations by COF and their resistance to adhesion. 1.2 The time until adhesion for the materials under the test conditions are reported and used to quantify the tribocouple’s adhesion resistance and susceptibility to galling or scuffing. Systems of higher adhesion resistance will give longer time until failure. 1.3 The coefficient of friction values averaged between the test reaching full test pressure and the time of the onset of adhesion or the end of tests run for a predetermined time period are recorded. Systems are ranked by their average coefficients of friction before adhesion occurs. 1.4 Units— The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard except psi and pounds in Table 1. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 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, surface treatments, and lubricants by CFT and in their resistance to adhesive wear. Since adhesive wear is a complex phenomenon and stochastic in nature, it is essential to evaluate surfaces to confirm the presence of adhesion. 5.2 This test method should be considered when evaluating the impact of changes in a process or application that is prone to adhesive wear, including any combination of scoring, galling, and plowing. These modes of failure commonly occur under sliding contact, at high contact stress, and, when applicable, at lubricant starvation. 5.3 The TCT is often used to evaluate the ability of material couples, surface treatments, coatings, and lubricants to prevent or reduce adhesive wear in metalworking operations including deep drawing, extrusion, and pipe bending. Other applications in which the test may be effective are loader bucket bushings, gear teeth at startup, and low-clearance pumps. 5.4 This test method is best used as a comparative screening tool. The ranking of performance produced by the TCT correlates well with the ranking in many applications. 3 However, since the test is a bench test and not directly reproducing any specific application, TCT results should be only used as an indicator of the tendency for adhesive wear to occur. TCT is a useful screening test for comparing the effectiveness of material couples, surface treatments, coatings, and lubricant formulations before process testing and field trials.