Abstract
In order to improve the surface quality and wear resistance of Mn13, increase its service life. Mn13 was strengthened by ultrasonic surface rolling (USRP). The effects of ultrasonic rolling parameters (rolling pressure and rolling times) on surface roughness and surface hardness were studied. A set of surface roughness instrument and micro Vickers hardness instrument were used to analyze the samples Moreover, the surface quality of Mn13 before and after ultrasonic rolling was compared and analyzed. The results show that increasing the rolling times can reduce the surface roughness significantly, but excessive rolling times are liable to produce microcracks. Increasing the static pressure, the surface hardness and the depth of strengthening layer will increase. And the roughness can be reduced below 0.06 μm after ultrasonic rolling. The surface hardness can reach up to 741 HV, and the depth of strengthening layer is 700 μm.
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