Firstly, the mathematical model and numerical simulation for temperature field of spinel modified by HCPEB is carried out. The optimized modification parameters for spinel remelting are obtained: the irradiation energy density is 2J/cm2 and the irradiation time is 5μs. Then, the spinel is modified on the high-current pulsed electron beam equipment by using those parameters. The change of infrared transmittance is examined on a high resolution spectrometer before and after modification. The modified spinel is polished on magnetorheological finishing machine. The surface morphology and roughness of modified layer is observed on the Zygo white light interferometer after polishing. It is found that the grain is refined and the surface roughness is reduced from Ra 13.28nm to Ra 8.86nm.
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