ALUMINUM ALLOY SHEET FOR FORMING AND METHOD FOR PRODUCING THE SAME
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United States of America Patent
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Aug 22, 2024
app pub date -
Jun 7, 2022
filing date -
Aug 2, 2021
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Abstract
In an aluminum alloy sheet for forming, when hardness (Hv) is measured at intervals of 1/16 of a sheet thickness in a sheet thickness direction from a depth position at ½ the sheet thickness to a sheet surface, hardness distribution is plotted with the hardness (Hv) on a vertical axis and distance (mm) from the depth position at ½ the sheet thickness on a horizontal axis, a relation between the hardness (Hv) and the distance (mm) from the depth position at ½ the sheet thickness is approximated by a linear function based on the plotted hardness distribution, and a slope A of the linear function is determined by the least squares method, a product obtained by multiplying the slope A by the sheet thickness (mm) is 10 to 28. It is possible to provide an aluminum alloy sheet that can improve the effect of reducing the springback amount by bottoming.
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