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High-plasticity high-strength cast aluminum alloy containing nickel and copper and preparation method of high-plasticity high-strength cast aluminum alloy

A technology of casting aluminum alloy and high plasticity, applied in the field of metallurgy, can solve problems such as low strength, and achieve the effect of increasing strength

Active Publication Date: 2022-02-18
长三角先进材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Tesla Motors applied for the Al-Ni-based high-performance die-casting aluminum alloy "High performance aluminum alloys with enhanced castability for die casting" (WO2020028730) in 2020. Low, yield strength and tensile strength are 90MPa and 150MPa respectively

Method used

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  • High-plasticity high-strength cast aluminum alloy containing nickel and copper and preparation method of high-plasticity high-strength cast aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] For the alloy of Example 1, the yield strength at room temperature is 153MPa, the tensile strength is 264MPa, and the elongation is 15.8%. After heat treatment (T6), the mechanical properties yield strength can reach 213MPa, the tensile strength can reach 326MPa, and the plasticity can reach 11.7%. .

Embodiment 2

[0023] Example 2 alloy, the yield strength at room temperature is 128MPa, the tensile strength is 224MPa, and the elongation is 16.3%. After heat treatment (T6), the mechanical properties yield strength can reach 178MPa, the tensile strength can reach 286MPa, and the plasticity can reach 12.8%.

Embodiment 3

[0024] In Example 3 alloy, the room temperature yield strength is 158MPa, the tensile strength is 276MPa, and the elongation is 11.7%. After heat treatment (T6), the mechanical properties yield strength can reach 235MPa, the tensile strength can reach 357MPa, and the plasticity can reach 8.3%.

[0025] It can be seen from the properties of the alloys of the above three groups of examples that the strength of the alloy prepared by the present invention is significantly improved compared with the existing Al-Ni-based aluminum alloys. This is because the addition of the alloying element Ce can further refine the Al 3 The Ni phase has the effect of dispersion strengthening; at the same time, Ce can combine with Cu to form nanoscale precipitates, which can effectively pin dislocations and improve the strength of the alloy.

[0026] In addition, the present application also proposes a method for preparing a high-plastic and high-strength cast aluminum alloy containing nickel and copp...

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Abstract

The invention discloses a high-plasticity high-strength cast aluminum alloy containing nickel and copper and a preparation method of the high-plasticity high-strength cast aluminum alloy. The alloy comprises the following components in percentage by weight: 3.0%-6.0% of Ni, 0.01%-2% of Cu, 0.2%-1.0% of Ce, 0.2%-0.7% of Mn, 0.01%-0.04% of Ti and less than 0.2% of Fe, with the balance being Al and other inevitable impurities. According to the preparation method, nickel is added, so a fine and dispersed columnar Al3Ni phase can be formed on a matrix, and dispersion strengthening effect is achieved; a second phase can be refined by adding Ce; and meanwhile, Ce and Cu can be combined in a matrix to form fine precipitated phases which are distributed in a dispersed mode, so dislocation is effectively pinned, and strength is improved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a high-plasticity and high-strength casting aluminum alloy containing nickel and copper and a preparation method thereof. Background technique [0002] The lightweight research of automobiles is more and more favored by researchers, and aluminum alloy, as the most widely used light alloy, will be more widely used in the automobile industry. In the structural parts of automobiles, more and more parts are replaced by cast aluminum alloys. [0003] With the development of the automobile industry, the performance requirements for cast aluminum alloys are getting higher and higher, but the commonly used cast aluminum alloys can no longer meet the requirements of automobile process performance, especially the requirements of strong plasticity matching. For automotive structural parts, Ji concluded in the paper "Development of a super ductile diecast Al-Mg-Si alloy" (Materials Sci...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03
CPCC22C21/00C22C1/026C22C1/03
Inventor 黄诗尧赵海龙黄理陈秋任包祖国郑江韩维建
Owner 长三角先进材料研究院
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