Aluminum alloy for die casting and die casting mold manufactured using the same

Patent metadata

Field	Value
Publication number	US-11318526-B2
Application number	US-201715843370-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Dec 16, 2016
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

The present disclosure relates to an aluminum alloy for die casting, more particularly, to an aluminum alloy for die casting which has high corrosion resistance, strength and castability.The embodiments of the present disclosure provide an aluminum alloy for die casting comprising a composition ratio having an aluminum (Al) content which occupies almost the composition ratio of the aluminum alloy; a magnesium (Mg) content of 2.5˜3.0%; a silicon (Si) content of 9.6˜0.5%; a zinc (Zn) content of 0.5% or less; and a copper (Cu) content of 0.15% or less.

First claim

What is claimed is:

1. An aluminum alloy for die casting comprising:
aluminum (Al), magnesium (Mg), silicon (Si), zinc (Zn), copper (Cu), beryllium (Be), iron (Fe), manganese (Mn), nickel (Ni), tin (Sn), lead (Pb), titanium (Ti), boron (B), and calcium (Ca), wherein the aluminum alloy comprises by weight:
2.6 to 3.0% magnesium (Mg);
9.9 to 10.5% silicon (Si);
0.5% or less zinc (Zn);
0.15% or less copper (Cu);
0.5 to 0.6% manganese (Mn);
0.03% or less nickel (Ni);
0.03% or less tin (Sn);
0.05% or less lead (Pb);
0.01 to 0.02% titanium (Ti);
0.002 to 0.004% boron (B);
0.01% or less calcium (Ca);
iron (Fe) greater than 0.65% and less than or equal to 0.7%;
0.005% to 0.008% beryllium (Be); and
a balance including aluminum (Al) and unavoidable impurities.

2. The aluminum alloy of claim 1 , wherein Fe is about 0.7% of the aluminum alloy by weight.

3. A die casting product manufactured by using the aluminum alloy of claim 1 .

4. The die casting product of claim 3 , wherein a temperature of a molten metal for manufacturing the die casting product corresponds to a temperature of a molten metal of an ALDC-3 alloy.

5. The die casting product of claim 4 , wherein the temperature of the molten metal of the ALDC-3 alloy is 650° C.

6. The die casting product of claim 3 , wherein the die casting product has a corrosion resistance property that corresponds to a corrosion resistance property of an ALDC-6 alloy, and a castability property that is greater than a castability property of an ALDC-3 alloy.

7. The die casting product of claim 3 , wherein the die casting product has a breaking strength in a range from 3600 to 4000 kgf/cm 2 .

8. The die casting product of claim 3 , wherein the die casting product includes a spider that is configured to couple to a rear wall or lower wall of a drum, the drum being configured to be mounted in a washing machine, and
wherein the spider is configured to transmit drive force of a motor to the drum.

Assignees

• Lg Electronics Inc

Inventors

• Kim Myeongdeok
• Bae Seongmo

Classifications

• B22D17/2209

  Selection of die materials (for permanent moulds B22C9/061) · CPC title

• C22C21/02 Primary

  with silicon as the next major constituent · CPC title

• B22D21/04

  Casting aluminium or magnesium {(no material; see B22D21/007)} · CPC title

• C22C21/04

  Modified aluminium-silicon alloys · CPC title

• D06F37/02

  Rotary receptacles, e.g. drums · CPC title