Mud pulser is the most commonly used Measurement While Drilling(MWD) instrument for downhole data transmission to the surface. The rotor of the key component of the mud pulser is made of cemented carbide material. Under the action of high speed mud erosion containing solid phase, the rotor will produce erosion wear and reduce the quality of signal transmission. To explore the erosion wear mechanism of rotor carbide in mud containing solid phase particles, the influences of different erosion angles and different erosion abrasive sizes on the erosion wear properties of cemented carbides were studied by taking quartz sand as erosion abrasive. By means of surface profilometer, scanning electron microscope (SEM) and energy spectrum analysis (EDS), the erosion wear mechanism of cemented carbide was revealed. The experimental results show that the erosion wear rate increases gradually with the increase of erosion angle. When the erosion angle is 90°, the maximum average erosion rate of WC-5Co, WC-6Co and WC-10Co cemented carbides is 2.39%, 2.42% and 3.22%, respectively. With the increase of the abrasive particle size, the erosion wear rate of the material increases first and then decreases. When 100–200 um, the maximum average erosion rates of WC-5Co, WC-6Co and WC-10Co are 1.84%, 1.98% and 2.48%, showing a significant “particle size effect”. At low erosion angle, the wear mechanism is furrow and cutting mark, while at high erosion angle, the wear mechanism is pit. The erosion wear mechanism of small particle size abrasives is that a large area of surface layer falls off in the erosion area. The erosion wear mechanism of large particle size abrasive is the material loss in the erosion pit in the erosion area.

泥浆脉冲器是最常用的随钻测量 (MWD) 仪器，用于将井下数据传输到地面。泥浆脉冲发生器关键部件转子采用硬质合金材料。在含有固相的高速泥浆侵蚀作用下，转子会产生侵蚀磨损，降低信号传输质量。为探究转子碳化物在含固相颗粒泥浆中的冲刷磨损机理，以石英砂为冲刷磨料，研究了不同冲刷角度和不同冲刷磨料粒度对硬质合金冲刷磨损性能的影响。通过表面轮廓仪、扫描电镜(SEM)和能谱分析(EDS)揭示了硬质合金的冲蚀磨损机理。实验结果表明，随着侵蚀角的增加，侵蚀磨损率逐渐增加。当冲蚀角为90°时，WC-5Co、WC-6Co和WC-10Co硬质合金的最大平均冲蚀率分别为2.39%、2.42%和3.22%。随着磨料粒径的增大，材料的冲刷磨损率先增大后减小。100-200 um时，WC-5Co、WC-6Co和WC-10Co的最大平均侵蚀率为1.84%、1.98%和2.48%，表现出显着的“粒度效应”。低冲蚀角磨损机理为沟纹和切痕，高冲蚀角磨损机理为凹坑。小粒径磨料的冲蚀磨损机理是在冲蚀区内大面积表层脱落。