Aluminum alloy and vehicle part using the same

Patent metadata

Field	Value
Publication number	US-10266931-B2
Application number	US-201414328006-A
Country	US
Kind code	B2
Filing date	Jul 10, 2014
Priority date	Dec 18, 2013
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

An aluminum alloy is provided that includes magnesium (Mg) of about 8.0 wt % to 10.5 wt %, silicon (Si) of about 1.9 wt % to 3.4 wt %, copper (Cu) of about 0.4 wt % to 2.0 wt %, and a balance of Al. In addition, a vehicle part is manufactured using the same aluminum alloy.

First claim

What is claimed is:

1. An aluminum alloy comprising:
magnesium (Mg) of 9.5 wt % to 10.5 wt %;
silicon (Si) of 1.9 wt % to 3.4 wt %;
copper (Cu) of 0.4 wt % to 2.0 wt %; and
a balance of aluminum (Al),
wherein a ratio of Mg to Si is from 3.1 to 4.3,
wherein the aluminum alloy has a structure including both primary crystal particles of Mg 2 Si and Al—Cu—Mg-based intermetallic compound particles,
wherein the aluminum alloy has produced amount of Al—Mg—Cu-based intermetallic compound of 9.5 wt % to 12.0 wt %,
wherein the aluminum alloy has tensile strength of 310 MPa to 335 MPa, and
wherein the aluminum alloy has yield strength of 175 MPa to 220 MPa.

2. A vehicle part manufactured by casting and performing heat treatment using the aluminum alloy of claim 1 ,
wherein the aluminum alloy has a structure including both primary crystal particles of Mg 2 Si and Al—Cu—Mg-based intermetallic compound particles.

3. The vehicle part of claim 2 , wherein the heat treatment is performed at a temperature between about 200° C. and about 250° C. for a time period between about 1.5 hours and about 4.5 hours.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kang Hee Sam
• Hong Eun Ji

Classifications

• C22C21/08 Primary

  with silicon · CPC title

• C22F1/047 Primary

  of alloys with magnesium as the next major constituent · CPC title

• C22C32/0078

  only silicides · CPC title

• B22D21/04

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