发明授权
- 专利标题: Process for manufacturing aluminum alloy material having excellent shape fixability and bake hardenability
- 专利标题(中): 具有优异的定形性和烘烤淬透性的铝合金材料的制造方法
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申请号: US930726申请日: 1992-08-14
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公开(公告)号: US5266130A公开(公告)日: 1993-11-30
- 发明人: Hidetoshi Uchida , Hideo Yoshida
- 申请人: Hidetoshi Uchida , Hideo Yoshida
- 申请人地址: JPX Tokyo
- 专利权人: Sumitomo Light Metal Industries, Ltd.
- 当前专利权人: Sumitomo Light Metal Industries, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX4-172780 19920630
- 主分类号: C22C21/02
- IPC分类号: C22C21/02 ; C22F1/00 ; C22F1/043 ; C22F1/047 ; C22F1/05 ; C22F1/04
摘要:
A process for manufacturing an aluminum alloy material having excellent shape fixability and bake hardenability, the process comprising: conducting semicontinuous casting of an aluminum alloy comprising 0.4 to 1.7% (wt.%) Si and 0.2 to 1.4% Mg, optionally further comprising 0.05% or less Ti and 100 pm or less B and optionally further comprising at least one member selected from the group of 1.00% or less Cu, 0.50% or less Mn, 0.20% or less Cr and 0.20% or less V, with the balance consisting of Al and unavoidable impurities, subjecting the cast alloy to conventional hot rolling; conducting solution heat treatment by holding the hot-rolled alloy at a temperature of from 450 to 580.degree. C. for 10 minutes or less; conducting first-stage cooling of the alloy at a cooling rate of 200.degree. C./min or more to a quenched temperature in the range of from 60 to 250.degree. C.; and subjecting the alloy to second-stage cooling at a cooling rate selected within the zone ABCD shown in the attached FIG. 2.