Removal mechanism of magnetic abrasive finishing on aluminum and magnesium alloys

Abstract

In this paper, the magnetic abrasive finishing (MAF) on AZ31B magnesium alloy and 7075-T6 aluminum alloy was carried out, using the spherical composite magnetic abrasive particles (MAPs) prepared by our research group independently. The finishing experiments were conducted by using the Al2O3/Fe-based MAPs and SiC/Fe-based MAPs, respectively. The results of our works show that there are disparities in the mutual suitability between the MAPs with different abrasive phase and the processed materials. After finishing, the surfaces of workpieces with the foggy mirror effect are obtained. The effects of MAF with different abrasive phase on the surface quality were investigated. The material removal mechanism and surface formation processing of workpieces in MAF were analyzed. The conclusion is as follows: in MAF processing, under the combined action of plastic deformation flow, skiving, extrusion, and chemical reaction, the surfaces of workpieces meet the requirements of surface quality.