▎ 摘　　要

NOVELTY - Preparing composite amorphous or nano crystalline soft magnetic core comprises (i) winding prefabricated Amorphous strip material, placing into a vacuum furnace, at the same time, filling nitrogen for protection, (ii) heating the vacuum furnace to a first preset temperature, filling methane gas, and growing at least one layer of graphene layer on the surface of the amorphous or nano crystalline strip; (iii) cutting off the methane gas, and heating the vacuum furnace to a second preset temperature to heat the amorphous or nano crystalline strip to obtain the amorphous or nano crystalline soft magnetic core of composite graphene. USE - Preparation method of composite amorphous or nanocrystalline soft magnetic core. ADVANTAGE - The method improves the toughness of the amorphous or nano crystalline strip by carrying graphene, and improves the defect of easy brittle fracture and production yield. The thermal conductivity of the magnetic strip material is improved and widens the application field. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of the preparation method of the composite amorphous or nanocrystalline soft magnetic core (Drawing includes non-English language text).