超硬磨料套料钻水下钻削P110钢的磨损实验

Wear experiment on underwater drilling of P110 steel using superhard abrasive core drill

P110钢具有良好的综合力学性能,广泛用作油气井的套管,使用硬质合金工具对其进行水下钻削时工具磨损严重。实验研究3种不同超硬磨粒及结合剂的套料钻水下钻削P110钢的磨耗比,跟踪观察套料钻表面的磨粒形貌变化,并分析金刚石磨粒表面的石墨化情况。结果表明:在相同加工条件下,3种不同套料钻的端面磨耗大致相同,但使用金刚石磨粒的套料钻侧面磨损明显小于使用立方氮化硼(cBN)磨粒套料钻的;在水下加工条件下,端面金刚石磨粒会产生石墨化,但其仍保持一定的切削能力;结合剂硬度影响磨粒出露,从而导致套料钻在不同工作状态下的性能产生差异。

P110 steel,renowed for its good comprehensive mechanical properties,is widely used as casing in oil and gas wells.However,it is seriously worn when using cemented carbide tools to drill it underwater.The study delves into the experimental exploration of the wear ratio of P110 steel during underwater drilling using three different kinds of super-hard abrasive grains and binders.The investigation includes tracking and observing the morphological changes of abrasive grains on the core drill's surface,along with the analysis of graphitization on the surface of diamond abrasive grains.The results show that under the same processing conditions,the end wear of the three different core drills is roughly the same.However,the side wear of the core drill using diamond abrasive particles is significantly less than that using cubic Boron Nitride(cBN)abrasive particles.Under the condition of underwater machining,the end face diamond abrasive grains will produce graphitization.Despite this,the diamond abrasive grains still maintain a certain cutting ability.The hardness of the bonding agent affects the exposure of abrasive particles,which results in the difference in the performance of the core drill under different working conditions.