Dry Sliding Wear Behavior of Boron-Doped 205 Manganese Steels

In the present study, the wear properties of 205 manganese steels produced by a casting process with different boron contents (0.0023-0.0182 wt.%) were investigated, using a pin-on-disc tribometer under dry sliding conditions. The friction coefficient of 205 manganese steel by boron addition (at 0.0076 wt.%) reduced from 0.28 to 0.18. The addition of boron to 205 manganese steel led to a decrease in the friction coefficient due to the lubricating effect of boron. X-ray diffraction showed that the boron addition to 205 manganese steel increased lattice parameters of the samples. The wear test results at 5 and 10 N loads showed that the wear amount of 205 manganese steels decreased with boron addition. Thus, the wear results showed that the wear resistance of 205 manganese steel is increased with the addition of small amounts of boron. Furthermore, scanning electron microscopy images indicated that the characteristic wear mechanisms for the boron-doped samples on the worn surfaces were abrasive, and it was plastic deformation, mild abrasive, and adhesive wear mechanism in the undoped 205 manganese steel.