| 摘要 |
PURPOSE:To obtain a semi-hard magnetic material having proper residual magnetic flux density and increased in coercive force without losing processability, by adding Mo and C to an Fe-Cu alloy containing Cu in a specific ratio. CONSTITUTION:A semi-hard magnetic material consists of, on the wt% basis, 3-25 Cu, 0.5-5 Mo, 0.09-0.8 C and the remainder Fe and has coercive force of 30-100 oersted and residual magnetic flux density of 12-18 kilogauss. In manufacturing this material, stock materials of Fe, Cu, Mo and C are melted by heating under vacuum or in the atomosphere at first to obtain a steel ingot containing Cu, Mo and C in the aforementioned ratio and this steel ingot is subjected to hot forging at about 800-1,000 deg.C and further hot rolled to be formed into a wire material with a diameter of about 9.5mm.. This wire material is annealed at about 600-900 deg.C and further subjected to cold drawing until the processing ratio thereof reaches about 90%. |
