| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite magnetic material which is low cost and high performance together with its manufacturing method, wherein a ferro-magnetic part and a non-magnetic part are continuously formed as one body. SOLUTION: An assembly wherein a ferrite group stainless steel and an austenite group stainless steel are alternately laminated, which is inserted in a sheath, is worked by hot-extrusion to form a rod. It is worked by cold-drawing in the direction reversal to that for hot-extrusion and then annealed to obtain a sleeve material for an electromagnetic coil, wherein a ferrite group stainless steel part (ferro-magnetic metal 3) and an austenite group stainless steel part (non-magnetic metal 4) are alternately laminated for an integral joint. |
