Method for continuous preparation of aluminum-base in-situ composite material

A technology of in-situ composite materials and aluminum-based composite materials, which is applied in the field of aluminum-based composite materials, can solve the problems of overall quality degradation of aluminum-based in-situ composite materials, severe gas absorption of aluminum and aluminum alloy melts, and increased maintenance costs and difficulties and other issues, to achieve the effect of easy industrial application, mature core technology and continuous preparation

Active Publication Date: 2014-04-09
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of the in-situ reaction of the melt is too high, which not only increases the cost and difficulty of equipment maintenance, but also seriously absorbs gas from the aluminum and aluminum alloy melt, which reduces the overall quality of the aluminum-based in-situ composite material.

Method used

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  • Method for continuous preparation of aluminum-base in-situ composite material
  • Method for continuous preparation of aluminum-base in-situ composite material

Examples

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Effect test

Embodiment 1

[0020] This example specifically implements a method for continuously preparing alumina particle-reinforced aluminum-based in-situ composite materials. 2 Powder and ZL101A alloy at a temperature of 630°C are added to a helical rheological extrusion device for mixing; among them, SiO 2 The amount of powder added accounts for 20% of the mass of the ZL101A alloy melt. The helical rheological extrusion device is made of hot-work die steel, and the part in contact with the aluminum melt is treated with plasma sprayed silicon nitride ceramics. It adopts a double helix form with a helix pitch of 2mm, inner cavity diameter 20mm, during use, the inner cavity temperature of the device is maintained at 630°C, and the screw rotation speed is 100r / min; the extruded mixture undergoes a chemical reaction in the tube connected to the outlet of the screw extrusion device, and the temperature of the high-temperature heating tube is The temperature is 900℃, made of silicon nitride ceramic materi...

Embodiment 2

[0023] This example specifically implements a method for continuously preparing TiC particle-reinforced aluminum-based in-situ composite materials. The specific process is: titanium powder with an average size of 30 μm and graphite powder with an average size of 10 μm that have been preheated at 350 ° C for 30 minutes The mixture and the ZL102 alloy at a temperature of 635 ° C are added to the helical rheological extrusion device for mixing; wherein, the mass ratio of titanium powder and graphite powder is 4:1, and the amount of the mixture powder accounts for 25% of the mass of the ZL102 alloy melt. The helical rheological extrusion device is made of hot work die steel, and the part in contact with the aluminum melt is treated with plasma sprayed silicon nitride ceramics. It adopts a double helix form with a helix pitch of 5mm and an inner cavity diameter of 40mm. During use, the inner cavity of the device The temperature is maintained at 635°C, and the screw rotation speed is...

Embodiment 3

[0026] This embodiment specifically implements a continuous preparation of TiB 2 The method of particle reinforced aluminum-based in-situ composite materials, the specific process is: the titanium powder with an average size of 30 μm and the B 2 o 3 The mixture of powder and ZL105 alloy at a temperature of 625°C is added to the helical rheological extrusion device for mixing; among them, titanium powder and B 2 o 3The mass ratio of the powder is 2:3, and the amount of the mixture powder accounts for 30% of the mass of the ZL105 alloy melt. The spiral rheological extrusion device is made of hot-working die steel, and the part in contact with the aluminum melt is made of plasma sprayed silicon nitride ceramics. The treatment adopts double helix form, the helix pitch is 4mm, and the inner cavity diameter is 30mm. During use, the inner cavity temperature of the device is maintained at 625°C, and the screw rotation speed is 200r / min; the extruded mixture is connected to the outle...

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Abstract

The invention relates to an aluminum-base composite material, and in particular relates to a method for continuous preparation of an aluminum-base in-situ composite material. The method is characterized by comprising the steps of mixing a pre-heated solid reactant with an aluminum alloy at near-liquidus temperature through a spiral rheological extrusion device, implementing chemical reaction in a high-temperature area after extrusion, continuously feeding a high-temperature aluminum-base composite material obtained from the reaction into a composite material melting bath; simultaneously, introducing an aluminum alloy melt which is at a relatively low temperature to the melting bath, electromagnetically stirring to mix the melt, reducing temperature of slurry of an aluminum-base in-situ composite material to normal pouring temperature of the base alloy so as to guarantee uniformity, molding through a conventional pouring method, and cooling to obtain an aluminum-base in-situ composite material ingot or casting. The method disclosed by the invention, which effectively integrates advantages of the prior art, is mature in core technology, easy to implement and convenient for industrial application.

Description

technical field [0001] The invention relates to aluminum-based composite materials, in particular to a method for continuously preparing aluminum-based in-situ composite materials. Background technique [0002] Compared with the traditional aluminum-based composites reinforced with external particles, the aluminum-based in-situ composites have the advantages of high thermodynamic stability of the reinforcement, good bonding between the reinforcement and the aluminum or aluminum alloy matrix interface, and clean surface of the reinforcement without brittle products. Broad application prospects. At present, the main preparation methods of aluminum-based in-situ composite materials include melt reaction method, gas-liquid reaction method, self-propagating high-temperature synthesis method, reaction sintering method, etc. Among them, the melt reaction method has received more and more attention because of its advantages such as controllable reaction process, easy molding of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/02C22C21/00C22C32/00
Inventor 陈刚赵玉涛杨睿陈誉元
Owner JIANGSU UNIV
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