Aluminum alloy forging and method of producing the same
AssigneeShowa Denko K. K.
InventorTakuya ARAYAMA
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Abstract
An aluminum alloy forging of the present invention includes 0.15 wt % to 1.0 wt % of Cu, 0.6 wt % to 1.3 wt % of Mg, 0.60 w t% to 1.45 wt % of Si, 0.03 wt % to 1.0 wt % of Mn, 0.2 wt % to 0.4 wt % of Fe, 0.03 wt % to 0.4 wt % of Cr, 0.012 wt % to 0.035 wt % of Ti, 0.0001 wt % to 0.03 wt % of B, 0.25 wt % or less of Zn, 0.05 wt % or less of Zr, the balance being Al and inevitable impurities. When integrated intensity of a diffraction peak of an AlFeMnSi phase in an X-ray diffraction pattern obtained by an X-ray diffraction measurement of a cross-section of the forging is “Q1” (cpd·deg) and integrated intensity of a diffraction peak of a (200) plane of an Al phase is “Q2” (cps·deg), a value of Q1/Q2 is 6×10−2 or less.
Claims6
(canceled)
A method of producing the aluminum alloy forging consisting of:
- 0.15 to 1.0 mass % of Cu;
- 0.6 mass % to 1.3 mass % of Mg;
- 0.60 mass % to 1.45 mass % of Si;
- 0.03 mass % to 1.0 mass % of Mn;
- 0.2 mass % to 0.4 mass % of Fe;
- 0.03 mass % to 0.4 mass % of Cr;
- 0.012 mass % to 0.035 mass % of Ti;
- 0.0001 mass % to 0.03 mass % of B;
- 0.25 mass % or less of Zn;
- 0.05 mass % or less of Zr;
- and the balance being Al and inevitable imporities,
- wherein, when integrated intensity of a diffraction peak of an AlFeMnSi phase in an X-ray diffraction pattern obtained by an X-ray diffraction measurement of a cross-section of the forging is “Q1” (cps·deg) and integrated intensity of a diffraction peak of a (200) plane of an Al phase is “Q2” (csp·deg),
- a value of Q1/Q2 is 6×10−2 or less,
- the method comprising:
- a molten metal forming step of obtaining a molten metal;
- a casting step of obtaining a casting by subjecting the molten metal obtained in the molten metal forming step to a casting process;
- a homogenization heat treatment step of subjecting the casting obtained in the casting step to a homogenization heat treatment;
- a forging step of obtaining a forging by subjecting the casting after the homogenization heat treatment step to a forging process;
- a solution treatment step of subjecting the forging obtained in the forging step to a solution treatment;
- a quenching treatment step of quenching the forging after the solution treatment step;
- and
- an aging treatment step of subjecting the forging after the quenching treatment step to an aging treatment,
- wherein the quenching treatment step performs a quenching treatment of bringing an entire surface of the forging into contact with quenching water within 5 to 60 seconds after the solution treatment step in a water bath for more than 5 minutes and 40 minutes or less.
Dependencies are inferred from the claim text.