| 发明名称 |
Al-base alloys containing lithium, copper and magnesium and method |
| 摘要 |
The present invention relates to Al-base alloys essentially containing Li, Cu and Mg, and having high specific characteristics and a high degree of ductility. Their composition is as follows (% by weight): -Li 1.7 to 2.9 -Cu 1.5 to 3.4 - <IMAGE> -Mg 1.2 to 2.7 -Fe </= 0.20 -Si </= 0.06 -Cr 0 to 0.3 -Mn 0 to 1.0 -Zr 0 to 0.2 -Ti 0 to 0.1 -Be 0 to 0.01 -Other elements (impurities) -each </= 0.05 -total </= 0.15 -balance: Al - The heat treatment comprises a homogenization step at about theta ( DEG C.)=535-5 (% Mg) which practically dissolves the compounds Al-Cu (Li-Mg); a solution treatment at between theta +10 DEG C.; a quenching step; and a tempering step at from 170 DEG to 220 DEG C. for a period ranging from 8 to 48 hours. The mechanical strength and ductility characteristics obtained are equivalent to those of conventional alloys 2000 or 7000.
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| 申请公布号 |
US4752343(A) |
申请公布日期 |
1988.06.21 |
| 申请号 |
US19850710691 |
申请日期 |
1985.03.11 |
| 申请人 |
CEGEDUR SOCIETE DE TRANSFORMATION DE L'ALUMINUM PERCHINEY |
发明人 |
DUBOST, BRUNO;MEYER, PHILIPPE |
| 分类号 |
C22C21/00;C22C21/06;C22C21/16;C22F1/00;C22F1/04;C22F1/057;(IPC1-7):C22F1/04 |
主分类号 |
C22C21/00 |
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