| 摘要 |
PURPOSE:To increase the permeability and to reduce the iron loss of an amorphous iron alloy by a method wherein the iron is incorporated with a limited amount of boron and carbon, and is annealed under the action of magnetic field and stress. CONSTITUTION:The iron alloy containing 11-17 atomic % of boron and 3-8% of carbon with the sum being 18-21% is annealed in magnetic field and non-oxidation atmosphere or vacuum at a range of temperatures below crystallization temprature (preferably, a temprature about 50 deg.C below crystallization temperature). Or, in this alloy, silicon is used to replace 5% or less of boron and less than 8% of carbon, and where necessary one of cobalt or nickel is added in 15% or less, with the total being 18-36%. This provides the amorphous alloy having a high permeability, low iron loss, and high flux densisty of 16,000 gauss or more, and as such capable of replacing silicon steel plate as magnetic core material. Also, magnetic properties are greatly improved by annealing treatment in this process. |
