To provide a warm-formed article which has excellent formability and can exhibit excellent bake hardenability as well, and to provide its production method.
The warm-formed article is obtained by subjecting a sheet stock 1 composed of an Al-Mg-Si based aluminum alloy sheet comprising, by mass, 0.5 to 2.0% Si and 0.2 to 1.5% Mg, and subjected to T4 treatment to warm forming. The production method uses the same. In the production method, a holding stage and a forming stage are performed. In the holding stage, the edge parts of the sheet stock 1 are held by dies 22 and wrinkle pressers 23 in a forming apparatus 2. In the forming stage, a punch 21 in the forming apparatus 2 relatively advances with respect to the dies 22, so as to form the sheet stock 1. In the holding stage and the forming stage, the temperatures of the flange parts 15 held by the dies 22 and the wrinkle pressers 23 and the punch 21, and time are controlled.
NAGAI YASUNORI
| JPH11350058A | 1999-12-21 | |||
| JP2004124175A | 2004-04-22 |
Tamiwa Iwakura
Takahashi Shoki
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