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Aluminium alloy semi-solid preform body and preparation method thereof

A semi-solid, aluminum alloy technology, which is applied in the field of preparation of aluminum alloy semi-solid blanks, can solve the problems of low mechanical properties and poor corrosion resistance of semi-solid blanks, and achieve high tensile strength, good corrosion resistance, and technological conditions. low effect

Inactive Publication Date: 2012-08-22
CSIC NO 12 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an aluminum alloy semi-solid billet with good corrosion resistance and high tensile strength, so as to solve the problems of low mechanical properties and poor corrosion resistance of the semi-solid billet in the prior art

Method used

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  • Aluminium alloy semi-solid preform body and preparation method thereof
  • Aluminium alloy semi-solid preform body and preparation method thereof
  • Aluminium alloy semi-solid preform body and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] Example 1, an aluminum alloy semi-solid billet, which is LC4 deformed aluminum alloy, consists of the following components: Zn: 5.58wt%, Mg: 2.40wt%, Cu: 1.58wt%, Cr0.21wt%, Si: 0.3wt% %, Fe: 0.35wt%, Mn: 0.2wt%, and the balance is Al. The liquidus temperature of the alloy is 620°C. After melting the alloy in an intermediate frequency induction furnace, the temperature of the alloy melt is 690-710°C. The melt is transferred to a standing furnace for refining and slag removal. After refining, it is melted The body temperature is 680-690°C, and then the molten metal is transferred into the tundish for ultrasonic vibration semi-continuous casting. The tundish temperature is controlled at 690-700°C, the ultrasonic vibration frequency is 30000HZ, the metal mold preheating temperature is controlled at 395-405°C (ultrasonic treatment time is 12s), the ultrasonic power is 300W, and the ultrasonic wave is introduced for stirring to obtain a semi-solid Blank, its metallographic ...

Embodiment 2

[0021] Example 2, an aluminum alloy semi-solid billet, which is LC9 deformed aluminum alloy, consists of the following components, Zn: 5.64wt%, Mg: 2.57wt%, Cu: 1.63wt%, Cr0.16wt%, Si: 0.2wt% %, Fe: 0.25wt%, Al balance. First melt the alloy in a resistance furnace, refine it at 690°C and let it stand for 10 minutes to remove slag, then put it into an ultrasonic vibration head for vibration, the ultrasonic vibration frequency is 20000HZ, the ultrasonic power is 200W, and the vibration temperature of the aluminum liquid is controlled at 675 -685°C, mold preheating temperature is 195-205°C. The tensile properties of the thus obtained semi-solid material are as follows: Rm=310MPa, Rs=220MPa, A=2%.

[0022] The semi-solid material is heat treated. The heat treatment process is 480°C×4h solid solution, 175°C×5h aging. After heat treatment, dissection, rough grinding, fine grinding and polishing, the metallographic sample was prepared and etched with 0.5% HF aqueous solution. The ...

Embodiment 3-23

[0023] Example 3-23, an aluminum alloy semi-solid billet, is LC9 deformed aluminum alloy, see Table 1 for composition, see Table 2 for process conditions, and the rest are the same as Example 1.

[0024] The composition of table 1 embodiment 3-23

[0025]

[0026] The process condition of table 2 embodiment 3-23

[0027]

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PUM

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Abstract

The invention discloses an aluminium alloy semi-solid preform body and a preparation method thereof, and is characterized in that: the preform body is deformed aluminium alloy and comprises components as following: Mg, Zn, Cu, Al and component A, the component A is selected from at least two ingredients of Cr, Si, Fe or Mn. By the adoption of the deformed aluminium alloy according to the aluminium alloy semi-solid preform body, the corrosion resistance is good, and the requirement on proportioning precision between components is lower, i.e. an obvious fluctuation on rheological, thixotropy and mechanical behavior of aluminium is not caused by a tiny fluctuation of the component. The alloy semi-solid preform body is prepared by the method of ultrasonic vibration according to the invention, the tensile strength is as high as 480MPa, the crystalline particles are small, with average diameters smaller than 40mum, the forming property is good, the requirement on process condition is lower, and the method is convenient to control and operate.

Description

technical field [0001] The invention relates to an aluminum alloy semi-solid blank, and also relates to a preparation method of the aluminum alloy semi-solid blank. Background technique [0002] As a new metal solidification forming process, semi-solid forming technology can obtain various metal materials and composite material formed parts with excellent performance. It is one of the most promising near-net shape technologies in this century. Since the semi-solid forming technology breaks the traditional dendrite solidification mode, it has unique advantages in terms of composition and structure uniformity, improving the comprehensive performance of the formed part and reducing the internal defects of the workpiece, and has received more and more attention. Research on semi-solid solidification forming technology has become a field of metal materials at home and abroad in recent years, especially the semi-solid forming technology of wrought aluminum alloys is a research hot...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C21/10C22C21/08B22D11/114
Inventor 黄引平马敏团李高锋张怀章刘春溪王泽
Owner CSIC NO 12 RES INST
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