Rolled aluminum alloy material and method for producing same

Abstract

Provided is a rolled aluminum alloy material having excellent glossiness and workability. This rolled material has a chemical composition containing 0.02 to 0.08 mass% of Si, 0.02 to 0.08 mass% of Fe, 0.06 to 0.15 mass% of Cu, 0.0005 to 0.01 mass% of Mn, 0.42 to 0.75 mass% of Mg, 0.001 to 0.1 mass% of Ni, 0.001 to 0.1 mass% of Zn, 0.0005 to 0.04 mass% of Ti, 0.0002 to 0.01 mass% of Ga, and 0.0002 to 0.01 mass% of B, with the remainder comprising Al and unavoidable impurities, and has a tensile strength of 100 to 180 MPa (inclusive) and an electrical conductivity of 50% IACS or more. And the reflectance after a chemical polishing treatment at a liquid temperature of 90 DEG C for 120 seconds using a chemical polishing liquid comprising 70% by volume of phosphoric acid, 5% by volume of nitric acid, and the balance of water is 65% or more.

Description

technical field [0001] The present invention relates to an aluminum alloy rolled material suitable for use in cosmetic casings, caps, reflectors for automobiles or interior lighting, ornaments, and the like by applying chemical polishing and anodizing treatment after forming. Manufacturing method. Background technique [0002] JISA1085 and A1050 are often used for components that are used in cosmetic housings, caps, reflectors for automobiles or interior lighting, decorative items, etc. and require both glossiness and formability such as deep drawing and spinning. Such as JIS1000 series aluminum materials. In addition, for applications that require special strength, 5000 series aluminum materials such as A5052 are often used. [0003] The standard structure of the aluminum material used for this purpose is to perform electrolytic polishing or chemical polishing with an acid bath containing phosphoric acid as the main component after forming, and then perform anodizing trea...

AI Technical Summary

Problems solved by technology

[0005] For such applications, JIS 1000 series pure aluminum alloys such as JIS A 1085 and A 1050 mentioned above have excellent drawing workability and gloss after chemical polishing, but have low strength, so when used as a product, there may be scratches during handling or damage caused by dropping or impact. Distortion issues

On the other hand, Al-Mg-based alloys (5000-series alloys) such as JISA 5052 known as high-strength materials currently have high strength, but the load on the mold during forming and the springback after forming are large, which does not necessarily meet the requirements. Ease of processing for accurate product shape and dimensional accuracy

Images