| 摘要 |
The invention relates to a novel alloy consisting essentially of 13-18% nickel, 7-11% aluminum, 0.5 to 10% cobalt, 0.1 to 2% silicon and the remainder substantially all iron, as is produced by heating the alloy composition to a temperature of about 1650 DEG C. or above to form a melt and then casting the melt in a suitable mold. After solidification, the casting is heated to approximately 1150 DEG C., held at that temperature for a sufficient time to insure that the whole mass is heated uniformly, and then cooled at the rate of about 300 DEG C. per minute. Parts are then given an aging for the purpose of producing uniform magnetic properties throughout the casting. Magnets thus cast, heat-treated and aged as aforesaid produce very stable magnetic properties with typical values of Br = 10,000, Hc = 150 and BH max = .85.
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