| 摘要 |
PROBLEM TO BE SOLVED: To provide an amorphous alloy excellent in bending strength and impact strength by avoiding stress concentration by means of the structure gradient from the surface layer part toward the inner part and allowing internal stress to remain in the surface of the alloy. SOLUTION: A high melting point compound of at least one or more elements among boron, carbon, oxygen, nitrogen, and fluorine, which are allowed to penetrate through the surface of an amorphous alloy ingot, with an amorphous- alloy-forming element is precipitated and a structure gradient is formed from the surface layer part toward the inner part, by which a compressive stress layer is formed in the surface part of the alloy. This alloy can be produced by heating an amorphous alloy ingot at a prescribed temperature-rise rate and allowing, in a state of supercooled liquid before crystallization, at least one or more elements among boron, carbon, oxygen, nitrogen, and fluorine to penetrate through the surface to precipitate a high melting point compound with an amorphous-alloy-forming element in the inner part of the alloy and resultantly strengthen the alloy.
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