Tribological properties of hydrogenated nitrile rubber in confrontation with hard particles under different axial loads

The influence of different axial loads on the tribological properties of Hydrogenated Nitrile Rubber (HNBR) under oil-based mud containing hard particles is studied through experimental and theoretical approaches. Friction and wear tests were performed by using pin-on-disc friction pairs. The findings indicate that the tribological properties of HNBR vary with axial load and wear time. The total friction coefficient can be divided into an adhesion term, a hysteresis term and an abrasive term through the analysis of tribological mechanism. The hysteresis term is due to micro-strain on the HNBR surface and overall deformation of the HNBR specimen. The variation of tribological properties can be well explained through the above theory and the hysteresis term is the main influence factor.

Automated summary

The study investigated the influence of different axial loads on the tribological properties of HNBR in oil-based mud containing hard particles using experimental and theoretical methods. It was found that the tribological properties of HNBR vary with axial load and wear time, and the total friction coefficient can be separated into adhesion, hysteresis, and abrasive terms. The hysteresis term, caused by micro-strain on the HNBR surface and overall deformation, was identified as the main factor affecting the tribological properties.