ALUMINUM ALLOY PLATE EXCELLENT IN PRESS FORMABILITY AND CONTINUOUS RESISTANCE SPOT WELDABILITY AND METHOD FOR PRODUCTION THEREOF

Title:

ALUMINUM ALLOY PLATE EXCELLENT IN PRESS FORMABILITY AND CONTINUOUS RESISTANCE SPOT WELDABILITY AND METHOD FOR PRODUCTION THEREOF

Document Type and Number:

WIPO Patent Application WO/2004/092432

Kind Code:

A1

Abstract:

An aluminum alloy plate which has a chemical composition, in mass %: Mg: 0.3 to 1.0 %, Si: 0.3 to 1.2 %, Fe: 0.10 to 1.0 %, Mn: 0.05 to 0.5 %, provided that Fe + Mn ≥ 0.2 %, and the balance: Al and inevitable impurities, has an average re-crystallization grain diameter of 25 μm or less, and contains an intermetallic compound having a diameter of a corresponding circle of 1 to 6 μm in an amount of 5000 pieces/mm² or more; the aluminum alloy plate further comprising 0.5 to 1.0 % of Cu, 0.1 to 0.4 % of Zr, 0.05 % or less of Ti or 0.05 % or less of Ti and 0.01 % or less of B; and a method for producing the aluminum alloy plate which comprises pouring a molten alloy having the above composition in the inside of facing rotary belt casting molds being forcedly cooled, solidifying at a cooling rate at the time of solidification of 40 to 90&ring C/sec to form a slab having a thickness of 5 to 10 mm, drawing the slab from the side opposite to that for pouring, rolling the slab directly or after winding into a coil form, thereby subjecting the alloy to a solution heat treatment. The aluminum alloy plate is excellent in press formability and continuous resistance spot weldability.

Inventors:

ZHAO PIZHI (JP)
SHINOHARA MASARU (JP)

Application Number:

PCT/JP2004/005258

Publication Date:

October 28, 2004

Filing Date:

April 13, 2004

Export Citation:

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Assignee:

NIPPON LIGHT METAL CO (JP)
ZHAO PIZHI (JP)
SHINOHARA MASARU (JP)

International Classes:

B22D11/00; B22D11/06; B22D11/124; B23K11/18; C22C21/02; C22C21/06; C22C21/08; C22F1/00; C22F1/043; C22F1/05; B23K103/10; (IPC1-7): C22C21/02; B22D11/00; B22D11/06; B22D11/124; C22C21/06; C22F1/05

Foreign References:

JP2000144294A	2000-05-26
JP2001262264A	2001-09-26
JPH05261562A	1993-10-12

Other References: