On the correlation between the earing and the orange peel in deep drawing of aluminium sheet (1st Report)
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概要
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Besides the "earing, " a problem in deep drawing of aluminium sheet is the "orange-peel" of surface, which grows as the result of the grain-growth under recrystallization. It is important, therefore, to find out the conditions under which the aluminium sheet with no "orange-peel" and less "earing" could be produced.For the purpose of finding out the correlation between the "earing" and "orange-peel, " the large type tests of deep-drawing have been made, under the below-mentioned conditions, by use of the sheets having the different Fe:Si ratio, which is considered to be an important factor of the directionality of sheet:1. Materials: 2S aluminium sheets with the Fe:Si ratio of 1:1, 1.6:1 and 2.6:1 respectively.2. Soaking: 2-8 hours under 535°C3. Cold-rolling: 92% and 90% reduction in one way as well as cross way rolling.The findings from the above-mentioned tests are summed up as follows: With the increase in the Fe: Si ratio, the "ear" grows more in the 45°-direction against the rolling direction than in the 0°-or 90°-direction, and as the 0°-or 90°-earing increases, the "orange-peel" becomes more remarkable. The soaking conditions, rolling direction and annealing temperature must be controlled so that the 45°-earing may not grow much and also the "orange-peel" may not appear.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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