Aluminum alloy ingot and method for producing same

Patent metadata

Field	Value
Publication number	US-12594595-B2
Application number	US-202218688128-A
Country	US
Kind code	B2
Filing date	Aug 29, 2022
Priority date	Sep 3, 2021
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

An aluminum alloy ingot contains Cu: 0.15 mass % or more and 1.0 mass % or less, Mg: 0.6 mass % or more and 1.2 mass % or less, Si: 0.95 mass % or more and 1.35 mass % or less, Mn: 0.4 mass % or more and 0.6 mass % or less, Fe: 0.15 mass % or more and 0.70 mass % or less, Cr: 0.09 mass % or more and 0.25 mass % or less, and Ti: 0.012 mass % or more and 0.035 mass % or less, with the remainder being made up of Al and unavoidable impurities, and in the aluminum alloy ingot, a difference between a maximum value and a minimum value of secondary dendrite arm spacing in a cross section perpendicular to a casting direction of the aluminum alloy ingot is in a range of 5 μm or more and 20 μm or less.

First claim

The invention claimed is:

1 . An aluminum alloy ingot including Cu: 0.15 mass % or more and 1.0 mass % or less, Mg: 0.6 mass % or more and 1.2 mass % or less, Si: 0.95 mass % or more and 1.35 mass % or less, Mn: 0.4 mass % or more and 0.6 mass % or less, Fe: 0.15 mass % or more and 0.70 mass % or less, Cr: 0.09 mass % or more and 0.25 mass % or less, and Ti: 0.012 mass % or more and 0.035 mass % or less, with the remainder being made up of Al and unavoidable impurities,
wherein a difference between a maximum value and a minimum value of secondary dendrite arm spacing in a cross section perpendicular to a casting direction of the aluminum alloy ingot is in a range of 5 μm or more and 20 μm or less, and
a standard deviation of the secondary dendrite arm spacing is 5 μm or less.

2 . The aluminum alloy ingot according to claim 1 , further including B: 0.0001 mass % or more and 0.03 mass % or less.

3 . A method for producing the aluminum alloy ingot according to claim 1 , performed using a horizontal continuous casting apparatus configured to supply an aluminum alloy molten metal in a molten metal receiving part from one end side of a hollow mold that is arranged so that a central axis of a hollow part is in a horizontal direction to the hollow part of the mold and produce an aluminum alloy ingot, the method comprising:
continuously supplying the molten metal from one end side of the mold to the hollow part, and supplying cooling water to a cooling water cavity which is formed outside an inner circumferential surface of the hollow part and in which the cooling water that cools the inner circumferential surface is accommodated; and cooling and coagulating the molten metal under conditions in which a heat flux value per unit area in a cooling wall part of the mold between the inner circumferential surface and an inner bottom surface of the cooling water cavity that forms a surface parallel to the inner circumferential surface is 10×10 5 W/m 2 or more.

4 . The method for producing an aluminum alloy ingot according to claim 3 ,
wherein the cooling wall part of the mold is formed to have a thickness in a range of 0.5 mm or more and 3.0 mm or less.

Assignees

• Resonac Corp

Inventors

• Tomita Yuto
• Kimura Yoshifumi

Classifications

• C22C21/02

  with silicon as the next major constituent · CPC title

• C22C1/026

  Alloys based on aluminium · CPC title

• B22D11/1245

  using specific cooling agents · CPC title

• B22D11/055

  Cooling the moulds {(B22D11/04 takes precedence)} · CPC title

• B22D11/049

  for direct chill casting, e.g. electromagnetic casting · CPC title