| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a magnet material, a thin strip magnet material, powder magnet material, and a bond magnet for a magnet excellent in magnetic characteristics and reliability. SOLUTION: A quenching thin strip manufacturing device 1 comprises a tube 2, a heating coil 4, and a cooling roll 5. A nozzle 3 for injecting a melt 6 of magnet material is formed at a lower end of the tube 2. A peripheral surface 53 of the cooling roll 5 is provided with a venting means. A quenching thin strip 8 injects the melt 6 from the nozzle 3 in inactive gas (atmospheric gas) such as helium gas, so that it collides with the peripheral surface 53 of the cooling roll 5 before cooled and solidified. Here, the gas which intrudes in between the peripheral surface 53 of the cooling roll 5 and a paddle 7 is exhausted from between the peripheral surface 53 and the paddle 7 by the venting means. |
