Aluminum-alloy sheet for bus bar and manufacturing method thereof
AssigneeUacj Corporation
InventorsHidetaka Nakanishi, Mineo Asano
Life of this patent
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Abstract
An aluminum-alloy sheet for a bus bar has a chemical composition containing Mg: 0.3%-0.9% (mass %, likewise below), Si: 0.2%-1.2%, Cu: 0.2% or less, and Fe: 0.5% or less, the remainder being Al and unavoidable impurities. In addition, acicular particles containing Mg and Si are present in the Al matrix at 900-4,000 particles/μm2. In addition, Fe-based particles present in the above-mentioned Al matrix have an average circle-equivalent diameter of 5 μm or less, and the number of particles having a circle-equivalent diameter of more than 2 μm is 10,000 particles/mm2 or less.
Claims20
An aluminum-alloy sheet for a bus bar produced by a process comprising:
- preparing a sheet material having a chemical composition containing Mg:
- 0.3%-0.9% (mass %, likewise below), Si:
- 0.2%-1.2%, Cu:
- 0.2% or less, and Fe:
- 0.5% or less, the remainder being Al and unavoidable impurities;
- subjecting the sheet material to a solution heat treatment;
- subsequently subjecting the sheet material to a skin pass with a rolling reduction of 1%-10%;
- and
- subsequently subjecting the sheet material to an artificial-aging treatment;
- wherein:
- acicular particles containing Mg and Si are present in the Al matrix at 900-4,000 particles/μm2;
- and
- Fe-based particles present in the Al matrix have an average circle-equivalent diameter of 5 μm or less, and the number of particles having a circle-equivalent diameter of more than 2 μm is 10,000 particles/mm2 or less.
A method of manufacturing an aluminum-alloy sheet, comprising:
- preparing a sheet material having a chemical composition containing Mg:
- 0.3%-0.9% (mass %, likewise below), Si:
- 0.2%-1.2%, Cu:
- 0.2% or less, and Fe:
- 0.5% or less, the remainder being Al and unavoidable impurities;
- subjecting the sheet material to a solution heat treatment;
- subsequently subjecting the sheet material to a skin pass with a rolling reduction of 1%-10%;
- and
- subsequently subjecting the sheet material to an artificial-aging treatment,
- wherein after the artificial-aging treatment:
- acicular particles containing Mg and Si are present in the Al matrix of the aluminum-alloy sheet at 900-4,000 particles/μm2;
- and
- Fe-based particles present in the Al matrix of the aluminum-alloy sheet have an average circle-equivalent diameter of 5 μm or less, and the number of particles having a circle-equivalent diameter of more than 2 μm is 10,000 particles/mm2 or less.
Dependencies are inferred from the claim text.