Effect of load and temperature on the abrasion behavior of the 20CrMnTi alloy steel

ObjectiveThe drill power head of the drilling rig often needs to withstand large torque in the working process, and the construction conditions are harsh. The gear material of the power head is often selected 20CrMnTi alloy steel, because the material has excellent hardness and wear resistance. It is also widely used in the preparation of key parts in various transmission devices, such as gears, bearings and drive shafts. However, concerning the power head of the drilling rig often needs to withstand large torque during the working process, the construction conditions are harsh, and the service conditions are complex and harsh, which usually result in a variety of complex abrasive behaviors during use. These will inevitably affect its service performance over time. It is very important to master the failure mechanism of surface abrasion damage of 20CrMnTi alloy steel during actual service.MethodsBased on the wear test device and electrochemical corrosion workstation, the damage behavior and corrosion kinetics of the 20CrMnTi alloy steel at different temperatures (25 ℃/100 ℃) and loads (35 N/55 N/75 N) were studied.ResultsThe test results show that the increase of wear temperature and normal load will aggravate the wear of the material, and then reduce the electrochemical corrosion resistance of the surface. In addition, the abrasion damage mechanism of the 20CrMnTi alloy steel is mainly manifested as abrasive wear and fatigue spalling.