The Cerchar test is the most commonly used method for evaluating rock abrasivity and estimating tool wear. The conventional test results are reported based on the measured changes of the wear parts, and little attention is paid to what happens on the rock surface and scratching force. Since the cutting process is the interactive behavior between cutting tools and rock materials, the changes in both parts are important to represent rock-tool interaction and evaluate cutting efficiency. In the present study, the Cerchar tests have been carried out on eleven types of monomineralic rocks by using an improved West apparatus. The related abrasive parameters have been comprehensively and systematically analyzed, including stylus tip wear, rock material loss, applied horizontal force, and scratching energy. The variation characteristics of those abrasive parameters have been studied. The specific abrasivity ratio (SAR) and scratching specific energy (SSE), which represent the tool wear and energy consumption per unit of rock removal respectively, have been developed to evaluate the cutting efficiency of different rocks. The results show that the SAR and SSE values of the tested rocks have comparable data ranges and variation trends due to the same mathematical treatment of the indices. Under the given rock removal volume, the SAR and SSE could be used to compare and classify the relative cutting efficiency of different rocks. The lower the SAR and SSE values, the less stylus wear and lower energy consumption in the cutting process, indicating higher cutting efficiency. According to their values, the cutting efficiency of the tested rocks is divided into four categories: high cutting efficiency, medium cutting efficiency, low cutting efficiency, and very low cutting efficiency. The SAR-based and SSE-based classifications are consistent for most of the tested rocks, and the SAR-based classification is lower to higher abrasive rocks (pyroxene, hematite, and quartz) due to it considering the influence of stylus tip wear. Hence the SAR-based classification is more suitable for hard and highly abrasive rocks.

中文翻译：

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单矿岩 Cerchar 磨料参数研究及其在评价切削效率中的应用


Cerchar 检验是评估岩石磨损性和估计工具磨损的最常用方法。常规测试结果是根据测量的磨损部件的变化来报告的，很少关注岩石表面发生的情况和刮擦力。由于切削过程是切削工具和岩石材料之间的交互行为，因此这两个部分的变化对于表示岩石与工具的相互作用和评估切削效率非常重要。在本研究中，使用改进的 West 仪器对 11 种类型的单矿物岩进行了 Cerchar 测试。对相关的磨料参数进行了全面系统的分析，包括测针尖端磨损、岩石材料损失、施加的水平力和划痕能量。已经研究了这些磨料参数的变化特性。比磨损率 （SAR） 和划痕比能量 （SSE） 分别代表工具磨损和每单位岩石去除的能耗，用于评估不同岩石的切削效率。结果表明，由于指数的数学处理相同，测试岩石的 SAR 和 SSE 值具有可比的数据范围和变化趋势。在给定的岩石去除量下，SAR 和 SSE 可用于比较和分类不同岩石的相对切割效率。SAR 和 SSE 值越低，测针磨损越小，切割过程中的能耗越低，表明切割效率越高。根据它们的数值，被测岩石的切割效率分为四类：高切割效率、中等切割效率、低切割效率和极低切割效率。 对于大多数测试岩石，基于 SAR 和基于 SSE 的分类是一致的，并且基于 SAR 的分类较低到磨蚀性较高的岩石（辉石、赤铁矿和石英），因为它考虑了测针尖端磨损的影响。因此，基于 SAR 的分类更适用于坚硬和高磨蚀性的岩石。