Preparing method for aluminum-based nano composite material

A nano-composite material and aluminum-based technology, applied in the field of metal-based composite materials, can solve the problems of weakening the reinforcing body on the strengthening effect, shape, size and distribution of the composite material, and achieve fine matrix grains and low reinforcement composition. Uniform and efficient manufacturing effects

Inactive Publication Date: 2018-11-06
CENT SOUTH UNIV
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Problems solved by technology

[0004] In situ self-generated TiB 2 Reinforced aluminum matrix composites have obvious performance advantages and good application prospects, but due to the in-situ self-generated TiB 2 The particles are micro-nano scale, and the large surface energy of the particle surface can make the reinforcement particles in the material agglomerate obviously. This uneven distribution of particles will weaken the strengthening effect of the reinforcement on the composite material; and the matrix composition and preparation process, etc. autogenous TiB 2 The shape, size and distribution of particles have a great influence

Method used

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  • Preparing method for aluminum-based nano composite material

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preparation example Construction

[0024] see figure 1 , the invention provides a method for preparing an aluminum-based nanocomposite, comprising the steps of:

[0025] (1) Calculate the mass ratio of each element according to the composition of the composite material.

[0026] (2) Prepare mixed salt according to the mass ratio, and place it in a mixer for drying. Specifically, the mixed salt is put into a powder mixer and mixed for 6-12 hours, then placed in a resistance furnace, and kept at 240-260° C. for 3-6 hours.

[0027] (3) Smelting pure aluminum ingots. Specifically, a medium-frequency induction furnace is used for melting, and the melting temperature is 750-800°C.

[0028] (4) Add the mixed salt into the pure aluminum melt and stir to form in-situ reinforced particles. Specifically, the process of adding the mixed salt to the pure aluminum melt takes 10-15 minutes. During the addition process, electromagnetic and mechanical stirring are applied, the stirring speed is 600-900 rpm, and the reaction...

Embodiment 1

[0035] This example provides an A356 / TiB 2 A method for preparing an aluminum-based nanocomposite material, comprising the following steps:

[0036] (1) Using the mixed salt reaction method to produce in-situ TiB 2 A356 composite material melt for reinforcement, the specific process is: according to A356 / 6%TiB 2 Nominal chemical composition of aluminum matrix composites Al-7Si-0.3Mg-6%TiB 2 , calculate the alloy element mass ratio of the aluminum matrix composite; according to the calculated mass ratio, firstly carry out KBF 4 and K2 TiF 6 Mix the mixed salt on the powder mixer for 8 hours, and then put the mixed salt in a resistance furnace at 250°C for 12 hours; the pure aluminum ingot is melted in an intermediate frequency induction furnace at a melting temperature of 800°C; after the pure aluminum is completely melted, Raise the melting temperature to 950°C, slowly add the mixed salt into the pure aluminum melt, and react to form TiB 2 Particles, electromagnetic and m...

Embodiment 2

[0041] This example provides A356 / Al 3 The preparation method of Zr aluminum-based nanocomposite material, comprises the following steps:

[0042] (1) Using the molten salt reaction method to produce in-situ Al 3 A356 composite material melt of Zr reinforcement, the specific process is: according to A356 / 3%Al 3 Nominal Chemical Composition of Zr Aluminum Matrix Nanocomposites Al-7Si-0.3Mg-3%Al 3 Zr, calculate the alloy element mass ratio of the aluminum-based nanocomposite; according to the calculated mass ratio, first carry out K 2 ZrF 6 Weigh it, and then place it in a resistance furnace at 250°C for 3 hours; the pure aluminum ingot is melted in an intermediate frequency induction furnace at a melting temperature of 800°C; after the pure aluminum is completely melted, the K 2 ZrF 6 Slowly add to the pure aluminum melt, the reaction generates Al 3 Zr particles, electromagnetic and mechanical stirring are applied during the addition process, the stirring speed is 600rpm,...

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Abstract

The invention relates to a preparing method for an aluminum-based nano composite material. An in-situ synthesis method is adopted to generate enhanced body particles in aluminum melt, and after alloyelements are added, aluminum-based nano composite material melt is manufactured; an aluminum-based nano composite material ingot blank is manufactured through the aluminum-based nano composite material melt via the rapid solidification jetting deposition technology; and then, the hot isostatic pressing technology is adopted for conducting densifying treatment on the aluminum-based nano composite material ingot blank, and the aluminum-based nano composite material is obtained after heat treatment of the ingot blank. The aluminum-based nano composite material prepared through the preparing method has the characters that enhanced body components are uniform, base body grains are fine, and the interface bonding strength is high, and the aluminum-based nano composite material can be applied tothe fields of aerospace, transportation, electronic devices, the sport industry and the like; and meanwhile, in-situ synthesis and rapid setting are integrally formed, efficient manufacturing of the aluminum-based nano composite material is achieved, and the preparing method is suitable for industry production.

Description

technical field [0001] The invention relates to the field of metal-based composite materials, in particular to a preparation method of aluminum-based nano-composite materials. Background technique [0002] With the rapid increase in the demand for high-performance materials in the fields of national aerospace technology, electronic communications, and transportation, metal matrix composites with various excellent comprehensive properties have developed rapidly. Ceramic particles reinforced aluminum matrix composites have the advantages of plasticity and toughness of metals and high strength and high stiffness of reinforcements. They have light weight, high specific strength, high specific modulus, excellent wear resistance and high temperature performance, and Its rich raw materials can overcome the disadvantages of fiber reinforced composite materials such as expensive long fibers, complicated preparation process, fiber damage, and poor interface bonding strength, laying a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/115B22F3/15C22C1/05C22C1/04C22C21/02C22C32/00C22C21/00C22C21/10C22C21/16
CPCC22C1/058C22C1/0416C22C21/00C22C21/02C22C21/10C22C21/16C22C32/0036C22C32/0073B22F3/115B22F3/15B22F2998/10C22C1/047B22F2003/248
Inventor 蔡志勇王日初彭超群冯艳
Owner CENT SOUTH UNIV
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