Title:
HIGH STRENGTH AND DUCTILITY CASTED ALUMINUM-SILICON ALLOY, MANUFACTURING METHOD FOR SAME, AND APPLICATIONS THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/113713
Kind Code:
A1
Abstract:
Provided in the present invention are a high strength and ductility casted aluminum-silicon alloy, a manufacturing method for same, and applications thereof. The aluminum-silicon alloy consists of the following components in terms of mass percent: Si 7-8%, Mg 0.4-0.5%, Fe 0.1-0.2%, Ti 0.1-0.2%, Sr 0.01-0.02%, La 0.03-0.06%, Ce 0.02-0.04%, and the remainder is Al and unavoidable elemental impurities. The manufacturing method comprises the smelting of an aluminum-silicon alloy liquid, refinement and modification, refining for gas removal and impurity removal, casting, and a solution ageing treatment. The present invention, by optimizing the content of elemental Si and Mg, refining and modifying an α-Al crystallite, a β-Fe iron-rich phase, and an eutectic Si phase, allows the α-Al dendritic crystal to be converted into fine equiaxed crystallites, allows the acicular and flaky β-Fe iron-rich phase and the eutectic Si phase to be converted into a fine granular or short rod form, and eliminates the hazards posed by the acicular and flaky β-Fe iron-rich phase and the eutectic Si phase on the strength, plasticity, and fracture toughness of the aluminum-silicon alloy. The casted aluminum-silicon alloy of the present invention is provided with high strength, great plasticity, and excellent fracture toughness and is applicable in casting various force-bearing structural parts, such as vehicular lightweight structural parts.
Inventors:
WANG SHUNCHENG (CN)
SONG DONGFU (CN)
KANG YUEHUA (CN)
HUANG HUILAN (CN)
SONG DONGFU (CN)
KANG YUEHUA (CN)
HUANG HUILAN (CN)
Application Number:
PCT/CN2018/123578
Publication Date:
June 11, 2020
Filing Date:
December 25, 2018
Export Citation:
Assignee:
GUANGDONG INST MATERIALS & PROC (CN)
International Classes:
C22C21/04; C22C1/03; C22C1/06; C22F1/043
Foreign References:
| CN108467978A | 2018-08-31 | |||
| CN103938004A | 2014-07-23 | |||
| CN108193096A | 2018-06-22 | |||
| CN102146542A | 2011-08-10 | |||
| EP2112242A1 | 2009-10-28 |
Attorney, Agent or Firm:
BEIJING GAOWO LAW FIRM (CN)
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