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A kind of high elastic modulus and high plasticity aluminum-silicon casting alloy and its preparation method and application

A casting alloy and high plasticity technology, applied in the field of casting aluminum alloy, can solve the problems such as the elastic modulus is only 72.4GPa, it is difficult to achieve elastic modulus and plasticity, and the elastic modulus is reduced, so as to achieve high strength, good plasticity, high The effect of the modulus of elasticity

Active Publication Date: 2022-07-12
SHANGHAI WANTAI AUTO PARTS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, measures to increase the elastic modulus of the alloy will reduce the plasticity of the alloy, and measures to increase the plasticity of the alloy will reduce the elastic modulus, and it is difficult to increase the elastic modulus and plasticity at the same time
For example, the widely used A356 alloy has a tensile strength of 260MPa and an elongation of 5% in the T6 state, but the elastic modulus is only 72.4GPa; while alloy A390, in the T6 state, has an elastic modulus as high as 81.2GPa, but the elongation is as low as 1% (The data comes from "Handbook of Aluminum and Alloy Materials", edited by Wu Gong, Yao Liangjun, Li Zhenxia, ​​Peng Ruqing, Zhao Zude, etc., Science Press, 1994.03)

Method used

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  • A kind of high elastic modulus and high plasticity aluminum-silicon casting alloy and its preparation method and application
  • A kind of high elastic modulus and high plasticity aluminum-silicon casting alloy and its preparation method and application
  • A kind of high elastic modulus and high plasticity aluminum-silicon casting alloy and its preparation method and application

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Embodiment 1

[0034] A high elastic modulus and high plasticity aluminum-silicon cast alloy, the composition and the mass percentage of each composition are shown in Table 1.

[0035] A preparation method of high elastic modulus and high plasticity aluminum-silicon casting alloy, comprising the following steps:

[0036] Prepare aluminum ingots and alloy raw materials. The aluminum ingots are selected from the Al99.70 aluminum ingots in the national standard GB / T 1196-2008 "Aluminum Ingots for Remelting", and the Al99.70 aluminum ingots are heated and melted to obtain an aluminum melt. The temperature is controlled at 680-800 ℃; other raw materials except Mg and P are added to the aluminum melt, and after the raw materials are melted, the Mg raw materials are added, and after the Mg raw materials are completely melted, stir evenly to obtain an alloy melt;

[0037]Add RJ-1 refining agent to the alloy melt, and carry out refining treatment. The refining temperature is 750°C and the refining ti...

Embodiment 2-5

[0041] Embodiment 2-5 is identical with embodiment 1, and the difference is:

[0042] The alloy composition is different. The alloy composition and the room temperature tensile properties of the prepared castings are shown in Table 1.

[0043] In addition, Comparative Example 1 is provided, and its alloy composition and preparation method are the same as those of Example 3. The difference is finally metamorphic processing link. This Comparative Example 1 did not use P modification, but used Sr modification. After the modification treatment, the residual amount of Sr in the alloy was 0.036%. The room temperature tensile properties are shown in Table 1. P is a modifier of hypereutectic Al-Si alloy, which has a good modification effect on primary silicon. But it has no metamorphic effect on eutectic silicon. Sr is a modifier of hypoeutectic Al-Si alloy, which has excellent modification effect on eutectic silicon, but has no modification effect on primary silicon. In this co...

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Abstract

The invention discloses a high elastic modulus and high plasticity aluminum-silicon casting alloy, a preparation method and application, and belongs to the field of casting aluminum alloys. The high elastic modulus and high plasticity aluminum-silicon casting alloy includes components and their mass percentages as follows: Si is 14-18%, Cu is 0-0.4%, Mg is 0.2-0.5%, and Mn is 0-0.5% , Cr is 0.1-0.5%, Zr is 0-0.25%, Zn is 0-0.5%, Ti is 0.05-0.25%, Re is 0-0.5%, and the balance is Al and inevitable impurities. The high elastic modulus and high plasticity aluminum-silicon casting alloy utilizes P to effectively transform primary Si, and has the characteristics of light weight, good casting performance, high elastic modulus and high elongation, and high tensile strength strength. The high elastic modulus and high plasticity aluminum-silicon cast alloy can be applied to automobile parts with special requirements for elastic modulus and plasticity.

Description

technical field [0001] The invention relates to an aluminum-silicon casting alloy with high elastic modulus and high plasticity, a preparation method and application, and belongs to the field of casting aluminum alloy. Background technique [0002] Aluminum alloys are used more and more in the automotive field. Due to its low density, high specific strength and specific stiffness, good corrosion resistance, excellent electrical and thermal conductivity, and easy recycling, aluminum alloys have played an important role in realizing the lightweight of automobiles. Cast aluminum alloy has good fluidity and filling ability, and moderate mechanical properties. Cast aluminum alloy accounts for up to 80% of aluminum alloy applications for automobiles. It is widely used to replace cast iron materials for the manufacture of engine parts, cylinder heads, On structural parts such as wheels and bumpers. Aluminum alloys also have application potential in automotive braking systems. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/03C22F1/043
CPCC22C21/02C22C1/03C22C1/026C22F1/043Y02P10/20
Inventor 刘玉林张志应伟勇李道源孙福荣周术仁宁健
Owner SHANGHAI WANTAI AUTO PARTS
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