| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooling roll, a strip-like magnet material, magnet powder and a bond magnet with which the magnet excellent in the magnetic characteristic and the reliability can be provided. <P>SOLUTION: A rapidly cooled strip producing apparatus 1 is provided with a cylindrical body 2, a coil 4 for heating and the cooling roll 5. At the lower end part of the cylindrical body 2, a nozzle 3 for injecting molten metal 6 of the magnet material is formed. On the peripheral surface 53 of the cooling roll 5, and dimple correcting means is arranged. The rapidly cooled strip 8 is produced by injecting the molten metal 6 from the nozzle 3 into inert gas (atmospheric gas) such as helium gas, and colliding to the peripheral surface 53 of the cooling roll 5, cooling and solidifying. In this case, the dimple generated on the contacting surface with the peripheral surface 53 is divided by arranging the dimple correcting means on the peripheral surface 53 of the cooling roll 5, and the generation of the big dimple is prevented. <P>COPYRIGHT: (C)2003,JPO |
