AMORPHOUS ALLOY HAVING EXCELLENT BENDING STRENGTH AND IMPACT STRENGTH, AND METHOD FOR PRODUCING THE SAME

Title:

AMORPHOUS ALLOY HAVING EXCELLENT BENDING STRENGTH AND IMPACT STRENGTH, AND METHOD FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2000/003051

Kind Code:

A1

Abstract:

A molten alloy capable of forming an amorphous alloy is subjected to solidification under a pressure of more than 1 atm. to form an alloy having no defect, and also the cooling rate during the solidification is controlled so as to disperse fine crystals having a mean crystal grain diameter of 1 nm to 50 $g(m)m in a crystal volume percentage of 5 to 40 %, to thereby impart a uniform residual compression stress over the whole resultant amorphous alloy ingot. Further, an amorphous alloy ingot produced by this method can be strengthened by heating the alloy ingot at a specific temperature rising rate and rendering, in a supercooled liquid state before crystallization, at least one of boron, carbon, oxygen, nitrogen and fluorine to penetrate from its surface, to thereby precipitate a high melting point compound thereof with an element forming the amorphous alloy within the alloy ingot.

Inventors:

ZHANG TAU (JP)
NISHIYAMA NOBUYUKI (JP)
INOUE AKIHISA (JP)

Application Number:

PCT/JP1999/003385

Publication Date:

January 20, 2000

Filing Date:

June 24, 1999

Export Citation:

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Assignee:

JAPAN SCIENCE & TECH CORP (JP)
ZHANG TAU (JP)
NISHIYAMA NOBUYUKI (JP)
INOE AKIHISA (JP)

International Classes:

B22D27/09; B22D18/00; C22C1/00; C22C1/02; C22C33/00; C22C45/10; (IPC1-7): C22C45/00; B22D18/02; C22C1/02; C22C45/10

Foreign References:

JPS50222491A
JPH05331586A	1993-12-14
JPH10296424A	1998-11-10
JPH0119741A
JPH1171660A	1999-03-16

Other References: