| 摘要 |
PROBLEM TO BE SOLVED: To provide a producing method of a magnetic material with high magnetic characteristic and excellent corrosion resistance, and magnetic material and a bond magnet. SOLUTION: A quenched strip producing apparatus 1 is provided with a cylindrical body 2, a coil 4 for heating and a cooling roll 5 to rotate against the cylindrical body 2. At the lower end of the cylindrical body 2, a nozzle 3 for injecting molten metal 6 of magnetic material is formed. The molten metal 6 is injected from the nozzle 3 in inert gas (atmospheric gas) such as helium gas, and is made to collide against the circumferential surface 53 of the rotating cooling roll 5 and quenched to be a quenched strip 8. In such a case, flow of atmospheric gas caused by rotation of the cooling roll 5 is developed. This quenched strip 8 is produced under such condition that Reynold's number becomes <=1000 at a position near a paddle 7 of the gas flow. |
