Investigation on abrasive wear behavior of FeB alloys containing various molybdenum contents. (July 2019) - Yi, Yanliang
Abstract: Two-body abrasive wear behavior and mechanism of FeB alloys with different Mo contents have been systematically investigated. The results show that the Mo addition can promote the formation of Mo-rich and Cr-rich M2 B in FeB alloys, and the Mo-rich and Cr-rich M2 B possess the higher H (hardness) and δ A (plasticity factor) compared to the Fe-rich M2 B. Meanwhile, with the increase of Mo content, the V Mo+Cr / V Fe increases slightly firstly and then increases rapidly (Where the V Mo, V Cr and V Fe represents the volume fractions of Mo-rich, Cr-rich and Fe-rich M2 B, respectively, and the V Mo+Cr shows the volume fractions of V Mo and V Cr ). The wear results reveal that the wear rate decreases greatly with the increasing V Mo+Cr / V Fe, especially when the V Mo+Cr / V Fe < 0.42. During the two-body wear process, the main wear mechanism is microcutting, and the Mo-rich and Cr-rich M2 B provide better resistance to the SiC abrasive relative to the Fe-rich M2 B. In this case, the increasing V Mo+Cr / V Fe induced by the Mo addition contributes to the improvement of the abrasion resistance of FeB alloys effectively. Highlights: The Mo addition results in the formation of Mo-rich and Cr-rich M2 B in Fe-B alloy. The Mo-rich and Cr-rich M2 B possess higher H and δA compared to the Fe-rich M2 B. The Mo-rich and Cr-rich M2 B can provide better resistance to the SiC abrasive compared to the Fe-rich M2 B. The increasing V Mo+Cr / V Fe induced by the Mo addition facilitates the improvement of the abrasion resistance of Fe-B alloy effectively.