Aluminum alloy forging material, aluminum alloy forged product, and method for manufacturing same
AssigneeResonac Corporation
InventorsTakuya ARAYAMA, Yoshifumi KIMURA
Life of this patent
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Abstract
This aluminum alloy forged product is composed of 0.25 mass % or more and 0.55 mass % or less of Cu, 0.60 mass % or more and 1.25 mass % or less of Mg, 0.90 mass % or more and 1.4 mass % or less of Si, 0.35 mass % or more and 0.60 mass % or less of Mn, 0.15 mass % or more and 0.30 mass % or less of Fe, 0.25 mass % or less of Zn, 0.050 mass % or more and 0.30 mass % or less of Cr, 0.01 mass % or more and 0.1 mass % or less of Ti, 0.0010 mass % or more and 0.030 mass % or less of B, 0.0010 mass % or more and 0.050 mass % or less of Zr with a remainder being made up of Al and unavoidable impurities.
Claims8
An aluminum alloy forging material being composed of an aluminum alloy having an alloy composition containing 0.25 mass % or more and 0.55 mass % or less of Cu, 0.60 mass % or more and 1.25 mass % or less of Mg, 0.90 mass % or more and 1.4 mass % or less of Si, 0.35 mass % or more and 0.60 mass % or less of Mn, 0.15 mass % or more and 0.30 mass % or less of Fe, 0.25 mass % or less of Zn, 0.050 mass % or more and 0.30 mass % or less of Cr, 0.01 mass % or more and 0.1 mass % or less of Ti, 0.0010 mass % or more and 0.030 mass % or less of B, 0.0010 mass % or more and 0.050 mass % or less of Zr with a remainder being made up of Al and unavoidable impurities, a ratio Fe/Mn of an amount of Fe to an amount of Mn in terms of a mass ratio being less than 1.4,
- wherein conductivity after casting is 25% IACS or higher and 35% IACS or lower, and Rockwell hardness HRF is 62 or higher and 82 or lower.
An aluminum alloy forging material being composed of an aluminum alloy having an alloy composition containing 0.25 mass % or more and 0.55 mass % or less of Cu, 0.60 mass % or more and 1.25 mass % or less of Mg, 0.90 mass % or more and 1.4 mass % or less of Si, 0.35 mass % or more and 0.60 mass % or less of Mn, 0.15 mass % or more and 0.30 mass % or less of Fe, 0.25 mass % or less of Zn, 0.050 mass % or more and 0.30 mass % or less of Cr, 0.01 mass % or more and 0.1 mass % or less of Ti, 0.0010 mass % or more and 0.030 mass % or less of B, 0.0010 mass % or more and 0.050 mass % or less of Zr with a remainder being made up of Al and unavoidable impurities, a ratio Fe/Mn of an amount of Fe to an amount of Mn in terms of a mass ratio being 0.3 or more and 1.2 or less,
- wherein conductivity after casting is 25% IACS or higher and 35% IACS or lower, and Rockwell hardness HRF is 62 or higher and 82 or lower.
An aluminum alloy forged product being composed of an aluminum alloy having an alloy composition containing 0.25 mass % or more and 0.55 mass % or less of Cu, 0.60 mass % or more and 1.25 mass % or less of Mg, 0.90 mass % or more and 1.4 mass % or less of Si, 0.35 mass % or more and 0.60 mass % or less of Mn, 0.15 mass % or more and 0.30 mass % or less of Fe, 0.25 mass % or less of Zn, 0.050 mass % or more and 0.30 mass % or less of Cr, 0.01 mass % or more and 0.1 mass % or less of Ti, 0.0010 mass % or more and 0.030 mass % or less of B, 0.0010 mass % or more and 0.050 mass % or less of Zr with a remainder being made up of Al and unavoidable impurities, a ratio Fe/Mn of an amount of Fe to an amount of Mn in terms of a mass ratio being less than 1.4,
- wherein a number density of precipitates containing Mn within 2.0 μm including a grain boundary is 4 precipitates/μm2 or more, the rate of high angle grain boundaries having a crystal orientation difference of 15° or more is 27% or less, and an impact value at normal temperature is 10 J/cm2 or more.
An aluminum alloy forged product being composed of an aluminum alloy having an alloy composition containing 0.25 mass % or more and 0.55 mass % or less of Cu, 0.60 mass % or more and 1.25 mass % or less of Mg, 0.90 mass % or more and 1.4 mass % or less of Si, 0.35 mass % or more and 0.60 mass % or less of Mn, 0.15 mass % or more and 0.30 mass % or less of Fe, 0.25 mass % or less of Zn, 0.050 mass % or more and 0.30 mass % or less of Cr, 0.01 mass % or more and 0.1 mass % or less of Ti, 0.0010 mass % or more and 0.030 mass % or less of B, 0.0010 mass % or more and 0.050 mass % or less of Zr with a remainder being made up of Al and unavoidable impurities, a ratio Fe/Mn of an amount of Fe to an amount of Mn in terms of a mass ratio being 0.3 or more and 1.2 or less,
- wherein a number density of precipitates containing Mn within 2.0 μm including a grain boundary is 4 precipitates/μm2 or more, the rate of high angle grain boundaries having a crystal orientation difference of 15° or more is 27% or less, and an impact value at normal temperature is 10 J/cm2 or more.
Dependencies are inferred from the claim text.