| 摘要 |
PROBLEM TO BE SOLVED: To toughen an Al alloy or an Fe alloy in a short time. SOLUTION: While supersonic waves are applied to the Al alloy in which quasi-crystals are precipitately dispersed, or an the alloy or the Fe alloy having age-hardenability, aging treatment is performed at about a nose temperature of a TTT (time temperature transformation) curve. COPYRIGHT: (C)2003,JPO
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