Method for preparing high-silicon steel sheet by powder compression sintering

The invention discloses a method for preparing a high-silicon steel sheet by powder compression sintering, and belongs to the technical field of powder metallurgy. According to the method, gas atomized Fe-6.5 wt.% Si powder is used as a raw material, the powder is in a compact state through powder presetting, the powder is placed in a vacuum sintering furnace to be metallurgically bonded through high-temperature sintering, multi-passes hot rolling are carried out to a certain thickness and then 1-4 times of cold rolling are carried out, and finally annealing is carried out at high temperatureto obtain the high-silicon steel sheet with excellent performance. Compared with adopting water atomized powder, gas atomized high-silicon steel powder is adopted and oxide inclusions of an alloy system are greatly reduced, meanwhile, the problem that spherical gas atomized powder is difficult to form is solved by adopting a direct compression sintering method, so that the process complexity and the subsequent problems of