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Process for preparing Al-base composite material

A technology for aluminum-based composite materials and mixtures, which is applied in the field of preparation of aluminum-based composite materials, can solve problems such as unsatisfactory mechanical properties of products, and achieve the effects of improving elastic modulus, elongation at break and good mechanical properties.

Inactive Publication Date: 2009-09-09
江苏德翔化工机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to overcome the defects of the unsatisfactory mechanical properties of the product obtained by die-casting the aluminum-based composite material obtained by the existing preparation method, and to provide an aluminum-based composite material that makes the product obtained by die-casting have good mechanical properties. Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example illustrates the preparation method of the aluminum matrix composite material and product provided by the present invention.

[0034] At 720°C, add 80 grams of industrial pure aluminum to the resistance furnace to melt the aluminum, then, under the protection of nitrogen, and at a stirring speed of 600 rpm, add 4 grams of KBF 4 , 4 grams K 2 TiF 6 and 12 grams of TiO 2 The powder is evenly sprayed into the molten aluminum, mixed with the molten aluminum, then, the temperature is lowered to 565°C, under the protection of nitrogen, and the stirring speed is 650 rpm, the reaction is stopped for 30 minutes, and then the temperature is raised to dissolve the above mixture To the molten state (1300°C), react for 8 minutes, then add 2 grams of scouring agent NaSiF 6 , and stirring to remove by-products to obtain the aluminum matrix composite material precursor, continue to maintain the aluminum matrix composite material precursor in a molten state (1300 ° C), an...

Embodiment 2

[0037] This example illustrates the preparation method of the aluminum matrix composite material and product provided by the present invention.

[0038] At 720 ° C, add 80 grams of industrial pure aluminum to the resistance furnace to melt the aluminum, then, under the protection of nitrogen, and at a stirring speed of 650 rpm, 14 grams of KBF 4 , 12 grams K 2 TiF 6 and 16 grams of TiO 2 The powder is evenly sprayed into the molten aluminum, mixed with the molten aluminum, then cooled to 565°C, under the protection of nitrogen, and reacted at a stirring speed of 650 rpm for 40 minutes, then the stirring is stopped, and then the temperature is raised to bring the above mixture to Molten state (1350 ℃), after reacting for 5 minutes, then add 1.7 grams of KCl scouring agent, and stir to obtain aluminum-based composite material precursor after removing by-product, this aluminum-based composite material precursor continues to maintain in molten state (1350 ℃ ), and add 1.6 grams...

Embodiment 3

[0041] This example illustrates the preparation method of the aluminum matrix composite material and product provided by the present invention.

[0042] At 720°C, add 80 grams of industrial pure aluminum to the resistance furnace to melt the aluminum, then, under the protection of argon, and at a stirring speed of 650 rpm, add 30 grams of KBF 4 , 35 grams K 2 TiF 6 and 24 g TiO 2 The powder is evenly sprayed into the molten aluminum, mixed with the molten aluminum, then cooled to 565°C, under the protection of helium, and reacted at a stirring speed of 650 rpm for 50 minutes, then the stirring is stopped, and the above mixture is heated again Heat up to a molten state (1550°C), react for 7 minutes, then add 3 grams of NaSiF 6 and 2 grams of KCl scouring agent, and continuously feed nitrogen into the mixed melt, and stir to remove by-products to obtain the precursor of the aluminum-based composite material, and continue to maintain the precursor of the aluminum-based composi...

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Abstract

A method for preparing an aluminum-based composite material, wherein the method comprises uniformly mixing molten aluminum with KBF4, K2TiF6 and TiO2, then lowering the temperature to 500-600°C for reaction, and then raising the temperature to continue the reaction of the above-mentioned mixture to a molten state, removing The by-product is to obtain an aluminum-based composite material precursor, which is maintained in a molten state, and the molten aluminum-based composite material precursor is mixed with magnesium and copper. The parameters such as the tensile strength, yield strength, elongation at break and modulus of elasticity of the product triangular bracket obtained by adopting the method provided by the invention are all significantly improved, indicating that the method obtained by the method of the invention is adopted. The mechanical properties of the products made of aluminum-based composite materials are good, especially the mechanical properties of the products obtained after high-pressure die-casting are even more excellent.

Description

technical field [0001] The invention relates to a preparation method of a composite material, more specifically, to a preparation method of an aluminum-based composite material. Background technique [0002] Aluminum matrix composites have excellent physical and mechanical properties such as high specific strength, high specific modulus, high temperature resistance, wear resistance, small thermal expansion coefficient, and stable size. They are used in aerospace, military defense, automobiles, electronic instruments and other industries Has a wide range of applications. According to the different states of the two reaction components participating in the synthesis of the reinforcing phase, the preparation method of the aluminum matrix composite mainly includes three reaction modes: gas-liquid, solid-liquid, and solid-solid. [0003] Gas-liquid reaction method, also known as VIS method. The principle of this process is to use inert gas as a carrier, pass the gas containing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C21/00
Inventor 肖美群
Owner 江苏德翔化工机械有限公司