Dry Sliding Wear Behavior of Boron-Doped AISI 1020 Steels

Abstract

In the present study, the wear properties of AISI 1020 steels produced by a casting process with different boron contents were investigated, using a pin-on-disc tribometer under dry sliding conditions. The friction coefficients of undoped AISI 1020 steel, 0.002 and 0.01 wt% boron-doped samples were 0.33, 0.27, and 0.32, respectively. The addition of boron into AISI 1020 steel led to a decrease in the friction coefficient, due to the lubricating effect of boron; X-ray diffraction showed that both Fe2B and FeB phases are present in the boron-doped samples, both of which cause this lubrication. The wear test results also showed that the wear rate of the 0.002 wt% boron-doped AISI 1020 sample decreased compared to the undoped AISI steel, and then increased in the 0.01 wt% boron sample. Therefore, the wear resistance of AISI 1020 steel is increased with the addition of small amounts of boron. Scanning electron microscopy results indicated that the characteristic wear mechanism for the boron-doped sample surfaces was plastic deformation and mild abrasive wear; for undoped AISI 1020 steel, cracking and spalling were observed instead.

Wear assessment of Cr2O3‐/TiAlN‐coated DAC‐10 tool steel against steel and Al2O3 counterbodies

“…The direction of the rippled surface was perpendicular to the sliding movement with valleys and edges. In other study, similar deformed surface was observed on the worn surface of boron dopped AISI 1020 and 205 manganese steel after sliding against high‐speed steel counterbody 58,59 …”

“…In other study, similar deformed surface was observed on the worn surface of boron dopped AISI 1020 and 205 manganese steel after sliding against high-speed steel counterbody. 58,59 As discussed previously, harder Al 2 O 3 counterbody forms wear debris and flaky pieces (see Figure 9B). The formation of wear debris was attributed to the low yield strength of Al atoms present in the coating as well as in the counterbody, causing to ease in breakage during leading to three-body wear mechanism.…”

Possibilities of Using the Duplex System Plasma Nitriding + CrN Coating for Special Components

“…Despite the deteriorated surface roughness after the plasma nitriding process, better tribological surface properties were achieved (lower coefficient of friction µ and wear coefficient K). Similar results were achieved at work [60,61].…”

Effect of pack-boriding on the tribological behavior of Hardox 450 and HiTuf Steels

“…Hence, these hard phases, such as Fe 2 B and FeB, are separated during the sliding with the applied load, and delamination finally occurs. The microcracks develop under the surface of the sample and eventually spalling occurs, owing to surface roughness and repetitive forces acting on wear debris [39,40].…”