Abstract

The wear behaviors of 4145H drilling tool steel in water-based slurries were investigated under the conditions of various concentrations of SiO₂, Al₂O₃, and SiC sands using a modified ASTM B611 rubber ring wet grinding test system. Under identical conditions, the measured wear loss was positively correlated with the sliding distance, abrasive hardness, and sand concentration. However, the wear rate fluctuated within a very small range during the whole grinding process when the same abrasive with a certain mass fraction was used. Examination of the wear surface revealed that the 4145H steel specimens underwent plastic deformation but the main wear mechanism of the specimens was microcutting.

摘要

使用改进的 ASTM B611 橡胶环湿磨试验系统研究了 4145H 钻具钢在不同浓度 SiO ₂、Al ₂ O ₃和 SiC 砂条件下在水基泥浆中的磨损行为。在相同条件下，测得的磨损量与滑动距离、磨料硬度和砂浓度呈正相关。然而，当使用一定质量分数的相同磨料时，整个磨削过程中磨损率在很小的范围内波动。磨损表面的检查表明，4145H 钢试样发生塑性变形，但试样的主要磨损机制是微切削。