| 摘要 |
A molten alloy having an amorphous forming ability is pressure-solidified at a pressure exceeding one atmospheric pressure to eliminate casting defects. The cooling rate during the solidification is adjusted to disperse fine crystals having a mean crystal grain diameter of 1 nm to 50 mum and a volume percentage of 5 to 40% in an amorphous alloy ingot. In this way, a uniform residual compressive stress is imparted in the amorphous alloy ingot. Furthermore, the amorphous ingot produced by this method can be strengthened by heating it at a constant temperature rising rate to infiltrate at least one of boron, carbon, oxygen, nitrogen and fluorine from the surface of the amorphous alloy ingot in a supercooled liquid state before crystallization, to thereby precipitate a high melting point compound thereof with an element forming the amorphous alloy within the alloy ingot so as to strength the alloy.
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