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AssigneeResonac Corporation
InventorsHiroshi SHIMIZU, Hiroaki MURAKAMI, Yoshifumi KIMURA, Takuya ARAYAMA
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A suspension arm of an aluminum alloy containing 0.25 mass % or more and 0.37 mass % or less of Cu, 0.95 mass % or more and 1.25 mass % or less of Mg, 0.6 mass % or more and 0.75 mass % or less of Si, 0.05 mass % or more and 0.12 mass % or less of Mn, 0.15 mass % or more and 0.35 mass % or less of Fe, 0.25 mass % or less of Zn, 0.050 mass % or more and 0.26 mass % or less of Cr, 0.01 mass % or more and 0.1 mass % or less of Ti, 0.001 mass % or more and 0.03 mass % or less of B, and 0.0010 mass % or more and 0.050 mass % or less of Zr, and the remainder being Al and unavoidable impurities, the suspension arm having a tensile strength ratio of a part with the minimum equivalent strain to a part with the maximum equivalent strain is 0.84 to 1.
A suspension arm made from an aluminum alloy having an alloy composition containing Cu in a range of 0.25 mass % or more and 0.37 mass % or less, Mg in a range of 0.95 mass % or more and 1.25 mass % or less, Si in a range of 0.6 mass % or more and 0.75 mass % or less, Mn in a range of 0.05 mass % or more and 0.12 mass % or less, Fe in a range of 0.15 mass % or more and 0.35 mass % or less, Zn in a range of 0.25 mass % or less, Cr in a range of 0.050 mass % or more and 0.26 mass % or less, Ti in a range of 0.01 mass % or more and 0.1 mass % or less, B in a range of 0.001 mass % or more and 0.03 mass % or less, and Zr in a range of 0.0010 mass % or more and 0.050 mass % or less, with the remainder being made up of Al and unavoidable impurities, which is a forged product in which the ratio of the tensile strength of a part (T1) with the minimum equivalent strain to the tensile strength of a part (T4) with the maximum equivalent strain is 0.84 or more and 1 or less.
A suspension arm made from an aluminum alloy having an alloy composition containing Cu in a range of 0.25 mass % or more and 0.37 mass % or less, Mg in a range of 0.95 mass % or more and 1.25 mass % or less, Si in a range of 0.6 mass % or more and 0.75 mass % or less, Mn in a range of 0.05 mass % or more and 0.12 mass % or less, Fe in a range of 0.15 mass % or more and 0.35 mass % or less, Zn in a range of 0.25 mass % or less, Cr in a range of 0.050 mass % or more and 0.26 mass % or less, Ti in a range of 0.01 mass % or more and 0.1 mass % or less, B in a range of 0.001 mass % or more and 0.03 mass % or less, and Zr in a range of 0.0010 mass % or more and 0.050 mass % or less, with the remainder being made up of Al and unavoidable impurities, composed of
A suspension arm made from an aluminum alloy having an alloy composition containing Cu in a range of 0.25 mass % or more and 0.37 mass % or less, Mg in a range of 0.95 mass % or more and 1.25 mass % or less, Si in a range of 0.6 mass % or more and 0.75 mass % or less, Mn in a range of 0.05 mass % or more and 0.12 mass % or less, Fe in a range of 0.15 mass % or more and 0.35 mass % or less, Zn in a range of 0.25 mass % or less, Cr in a range of 0.050 mass % or more and 0.26 mass % or less, Ti in a range of 0.01 mass % or more and 0.1 mass % or less, B in a range of 0.001 mass % or more and 0.03 mass % or less, and Zr in a range of 0.0010 mass % or more and 0.050 mass % or less, with the remainder being made up of Al and unavoidable impurities, which is a forged product in which the ratio of the tensile strength of a part with the largest proportion of large-angle grain boundaries with a crystal orientation difference of 15° or higher to the tensile strength of a part with the smallest proportion of large-angle grain boundaries with a crystal orientation difference of 15° or higher is 0.84 or more and 1 or less.
Dependencies are inferred from the claim text.