| 摘要 |
PURPOSE:To provide an alloy for composite magnetic materials which is obtained by contg. a specific amt. of Al in an alloy consisting of specific ratios of Fe, Mn and C and which can transform a gamma phase easily to an alpha phase. CONSTITUTION:Al is contained at 0.1-4wt% in an alloy of the composition consisting of 2-20wt% Mn, 0.4-2wt% C and the balance Fe. The gamma phase of this alloy introduced at a room temp. can be easily transformed to an alpha phase by a heat treatment for a short time. It is possible to form the magnetic phase of arbitrary patterns at arbitrary depths on the surface of a non-magnetic material by annealing said alloy by using a laser beam or the like. |
