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 degumming and carbon residue caused by adding a forming agent are avoided, and the method has the advantages of being simple to operate, high in production efficiency, high in product precision, short in process flow, free of
pollution and inclusions, excellent in performance and the like.