Title:
ARTIFICIAL AGING PROCESS FOR ALUMINUM-SILICON ALLOYS FOR DIE CAST COMPONENTS
Document Type and Number:
WIPO Patent Application WO/2018/103065
Kind Code:
A1
Abstract:
Provided is a method of heat treating a die cast aluminum alloy component. A die cast component has at least one thin walled region with a thickness of ≤ 5 mm. The alloy has silicon at ≥ 6.5 mass ％ to ≤ 15.5 mass ％, copper at ≥ 0.1 mass ％ to ≤ 3.5 mass ％, magnesium at ≤ 0.5 mass ％, manganese at ≤ 0.6 mass ％, and chromium at ≤ 0.6 mass ％. The method includes quenching the die cast component at a cooling rate of ≥ about 100℃/second to a first temperature of less than 50℃ and age hardening by heating the die cast component to a second temperature of ≥ about 150℃ for a predetermined duration of time to facilitate formation of particles of Mg 2Si in an aluminum alloy matrix. The aluminum alloy treated by the method can form lightweight, high strength, high ductility components.
Inventors:
HU BIN (CN)
WANG PAN (CN)
WANG PAN (CN)
Application Number:
PCT/CN2016/109172
Publication Date:
June 14, 2018
Filing Date:
December 09, 2016
Export Citation:
Assignee:
GM GLOBAL TECH OPERATIONS LLC (US)
HU BIN (CN)
HU BIN (CN)
International Classes:
C22C21/02
Foreign References:
| CN1876867A | 2006-12-13 | |||
| CN100473735C | 2009-04-01 | |||
| CN102758155A | 2012-10-31 | |||
| CN101514409A | 2009-08-26 | |||
| CN101644203A | 2010-02-10 | |||
| US20060042727A1 | 2006-03-02 |
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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