The master reason is the harder rigidity of the formation rock, and the badder drill ability of rock, and the better rock abrasiveness. Drill string receives the complicated stress which is tension-compression stress, torsion stress, bending stress, etc.
其主要原因是：地层岩石的硬度高、可钻性差以及研磨性强；在长期工作中，钻具承受拉伸、压缩、弯曲和扭转等复杂应力。
参考来源 - 山前推覆带钻具失效的动力学机理研究The results of the measurement of the hardness has shown:the abrasiveness will improved largely. At last,the indication was verified by the wear experiments.
硬度测量结果表明:其耐磨性将大幅提高,这一点通过试样的磨损试验最终得以证实。
参考来源 - 激光强化改善半钢材料耐磨性的实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： harshness scratchiness
以上来源于: WordNet
The abrasiveness of white cast iron with low alloy content was studied through abrasion test.
通过磨损试验研究了变形对低合金耐磨铸铁耐磨性的影响。
The negative effect of this reinforcement is usually a decrease in impact strength and an increase in abrasiveness.
这种加强的负作用通常是抗冲击强度降低及磨损性增加。
The research results show that the steel fiber can improve remarkably the strength of the phosphate cement mortar, reduce its shrinkage and enhance its abrasiveness.
研究结果表明，掺入钢纤维可显著提高磷酸镁水泥砂浆的强度，降低砂浆的收缩率及提高砂浆的耐磨性能；
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