Aluminum alloy plate for dr tank body and manufacturing method thereof

Abstract

The present invention provides an aluminum alloy for DR can bodies that has a low selvage rate and is excellent in deep drawability even when a batch furnace is used, and a method for producing the same. An aluminum alloy plate for a DR tank body and a manufacturing method thereof, wherein the aluminum alloy plate for a DR tank body is an aluminum alloy composed of an aluminum alloy, and the aluminum alloy ingot is made into a finished plate through a hot-rolled plate and an intermediate annealed plate A plate wherein the aluminum alloy contains Si: 0.10 to 0.60% by mass (hereinafter referred to as "%"), Fe: 0.10 to 0.80%, Cu: 0.05 to 0.25%, Mn: 0.80 to 1.50%, Mg: 0.80 to 1.30% And the rest is composed of Al and unavoidable impurities, the Cube orientation density (CubeO) in the finished sheet is more than 2.00 times the random orientation density, and the ratio of CubeO to S orientation density (SO) (CubeO / SO) It is 0.40-1.00, and after blank firing, it has an elastic limit stress of 180-220 MPa and a tensile strength of 230 MPa or more.

Description

technical field [0001] The present invention relates to an aluminum alloy for DR can body which is excellent in deep drawability and has a low selvage rate, and a manufacturing method thereof. Background technique [0002] Aluminum alloys such as A3004 or A3104 in JIS standards are used as can body materials for aluminum cans because they have excellent formability and corrosion resistance. Aluminum can bodies include DR cans manufactured only by deep drawing and DI cans manufactured by deep drawing and iron forming. In these aluminum cans, selvedge rate is an important characteristic. Here, the selvage ratio will be described. Generally, in a deep-drawn cup, a high portion ("mountain") and a low portion ("valley") are formed at the upper end of the peripheral portion. The value obtained by dividing the difference between the average height of the mountains and the average height of the valleys by the average value of the valley heights is called the seizing rate. If the...

AI Technical Summary

Problems solved by technology

The ultra-hard material used has a high proof stress and is prone to wrinkling during deep drawing, making it unsuitable for DR tanks

In addition, since the hot-rolled sheet structure of Patent Document 5 is a partially recrystallized structure, the partially recrystallized structure cannot be obtained unless the temperature of the sheet is lowered.

Therefore, the rolling speed, which is one of the manufacturing conditions, has to be reduced, which leads to a reduction in production efficiency and a problem in that the manufacturing cost becomes high.

Images