超高锰钢耐磨性及其冲击磨料磨损行为的研究

通过动载荷冲击磨料磨损试验及磨损后磨面硬度测量,利用SEM和TEM观察磨损表面形貌和磨损亚表层组织,研究了超高锰钢的耐磨性和冲击磨料磨损行为.结果表明,冲击功为0.5 J和1.0 J时,碳含量较低的超高锰钢耐磨性与普通Mn13相当,碳含量较高的超高锰钢耐磨性高于普通Mn13;冲击功为2.0 J时,超高锰钢具有好的耐磨性,是普通Mn13的1.21倍,磨面硬度较高.超高锰钢冲击磨料磨损后磨损亚表层的变形组织主要由高密度位错和变形带组成,磨损亚表层的变形带相互交叉、截割.依据实际工况条件,加工硬化和冲击韧度适当配合的超高锰钢耐磨性良好.

Study of Wear Resistance and Impact Abrasive Wear of Super-high Manganese Steel

The wear resistance and impact abrasive wear behaviors of super-high manganese steel were investigated through dynamic impact abrasion test and hardness measurement of the abrasion surface, and the worn surface morphology and microstructure of abrasion subsurface was observed by SEM and TEM. The results show that the wear resistance of the super-high manganese steel with the lower carbon content is similar to as that of ZGMn13, but the wear resistance of the steel with higher carbon content is higher than that of ZGMn13 when the impact energies is 0.5 and. 1.0 J. However, when impact energy reachs up to 2.0 J, the wear resistance of super-high manganese steel is 1.21 times than that of ZGMn13, and the hardness of abrasion surface is higher than that of ZGMn13 as well. Deformed microstructure of the worn subsurface mainly consists of high density dislocation and deformation bands, and the bands intercross and cut mutually. Based on the practical operating condition, the appropriate matching between work hardening and impact toughness has good wear resistance for super-high manganese steel.