Abstract This work investigated the effects of sliding speed on tribological behavior of AA 7075 petroleum casing in simulated drilling environment by pin-on-disc wear test. The main wear mechanism of AA 7075 disc at low sliding speed (0.0628 m/s and 0.157 m/s) was abrasive wear and oxidative wear at middle sliding speed (0.314 m/s). As sliding speed increases to higher sliding speed (0.471 m/s and 0.628 m/s), adhesive delamination wear dominated the wear process. The tribo oxides layer can efficiently protected the alloy substrate only at sliding speed of 0.314 m/s. At higher sliding speeds, tribo oxides layer were removed quickly once it was formed due to its internal fractures of tribo oxides and lower bonging strength with substrate.

中文翻译：

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模拟钻井环境下滑动速度对AA 7075石油套管摩擦学行为的影响

摘要 本文通过销盘磨损试验研究了模拟钻井环境下滑动速度对AA 7075石油套管摩擦学行为的影响。AA 7075碟片在低滑动速度（0.0628 m/s和0.157 m/s）下的主要磨损机制是中等滑动速度（0.314 m/s）下的磨粒磨损和氧化磨损。随着滑动速度增加到更高的滑动速度（0.471 m/s 和 0.628 m/s），粘附分层磨损在磨损过程中占主导地位。摩擦氧化物层仅在 0.314 m/s 的滑动速度下才能有效保护合金基体。在较高的滑动速度下，摩擦氧化物层一旦形成，由于摩擦氧化物的内部断裂和与基材的结合强度较低，摩擦氧化物层很快被去除。