Abstract: The structure, phase, texture and magnetic properties of the samples of the finished grain oriented silicon steel with Si content of 3% were tested and analyzed after solid siliconizing and diffusion annealing by pack cementation. The results showed that: the silicon permeable layer with smooth surface, dense interior and good bonding with matrix can be prepared on the oriented silicon steel with Si content of 3 % in a short time (10 min) under the condition of 800 ℃ and silicon powder + (mass fraction 0.5 %) halide + filler, and Goss texture can be completely retained with high frequency iron loss reduced significantly (37 %~63 %) after diffusion annealing. It has been proved that solid silicon osmosis technology can prepare oriented high silicon steel with excellent magnetic properties.

Key words: grain oriented high silicon steel, solid siliconizing, diffusion annealing, preparation