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Preparation method of thin-wall tubular product of particle-reinforced aluminum-based composite material

A particle-reinforced aluminum and composite material technology, which is applied to pipes, rigid pipes, mechanical equipment, etc., can solve the problems of large diameter-to-wall-thickness ratio of thin-walled composite pipes, difficult processing methods, and high preparation costs. The effect of promotional value, good interface combination, and short preparation process

Active Publication Date: 2010-06-16
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The thin-walled composite pipes prepared by hot and strong spinning and warm and strong spinning methods have a large diameter-to-wall thickness ratio, which is difficult to achieve by single processing methods such as casting, extrusion, and rolling.
Thin-wall composite pipes can also be prepared by casting and powder metallurgy ingot + back extrusion + spinning, but the process is long and requires a large extruder, resulting in high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of Al by stirring casting method 2 o 3 / 6061 composite material tube billet: add 6061 aluminum alloy into the crucible, heat it under the protection of argon to melt the aluminum alloy ingot, raise the temperature to 680-1000°C, mix 6061 aluminum alloy with Al 2 o 3 The prefabricated block with a particle volume ratio of 5-2:1 is preheated to 500-700°C, added to the aluminum alloy solution, and mechanically stirred, and hexachloroethane is added to the melt to degas, and the pouring temperature is 650-650°C. 780°C, and then poured into the mold to form a tube blank; the specification of the tube blank is: Ф120mm×15mm×400mm. al 2 o 3 / 6061 composite material, reinforced particle Al 2 o 3 The volume fraction is 8%, and the average size is 7 μm. The tube blank is subjected to double-stage homogenization treatment at 420°C×6h+500°C×6h, turned and skinned, and then subjected to a thermal compression test. The Kumar model was used to establish the constit...

Embodiment 2

[0029] The preparation process of the composite material, the preparation of the tube blank, the uniform treatment, and the processing process of hot spinning are the same as in Example 1. The temperature of the warm spinning is 250°C, the working angle of the spinning is 25°, the tool and mold are preheated at 250°C, and the Oxygen-acetylene flame spray gun heat supplement, the feed ratio is 1mm / r, the pass thinning rate is 25%, and the spinning is 3 passes. The annealing temperature is 250°C, the temperature is kept for 60 minutes, and the furnace is cooled. In order to ensure the quality of the inner and outer surfaces, the spinning temperature is lowered to 150°C, the working angle of spinning is 25°, and the oxygen-acetylene flame spray gun is used to replenish heat intermittently for a short time, the feed ratio is 1.5mm / r, and the number of passes is reduced. Thinness rate is 30%; solid solution temperature is 510°C, heat preservation for 50min, water quenching at room ...

Embodiment 3

[0031] Al was prepared by powder metallurgy 2 o 3 / 2124 composite material tube blank, the specification of the tube blank is Ф300mm×40mm×200mm. al 2 o 3 / 2124 composite material, reinforced particles Al 2 o 3The volume fraction is 10%, and the average size is 0.5 μm. The tube blank is subjected to double-stage homogenization treatment at 480°C×6h+540°C×6h, turned and skinned, and then subjected to a thermal compression test. The temperature range suitable for thermal processing of composite materials is 400-550°C. The Kumar model was used to establish the constitutive relationship of composite materials, the temperature range was 300-550°C, the temperature interval was 50°C, and the strain rate range was 0.001-10s -1 , combined with the microstructure under different deformation conditions, the deformation conditions suitable for the processing of composite materials are obtained. Using finite element numerical simulation to optimize the spinning process parameters, th...

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Abstract

The invention relates to a preparation method of a thin-wall tubular product of a particle-reinforced aluminum-based composite material, which comprises the steps of: 1, preparing a tube blank by adopting a mixing and casting process and a powder metallurgy process; 2, homogenizing the tube blank, turning and stripping, carrying out a high-temperature compression deformation test to obtain a suitable processing deformation condition; 3, spinning the tube blank for finite element number value simulation, optimizing process parameters, and thermally spinning and warmly spinning; and 4, carrying out solution treatment on the obtained tubular product, and ageing after water hardening at room temperature. The tubular product prepared by the invention has larger diameter wall thickness ratio, smooth internal surface and outer surface without defects, uniform wall thickness and better interface combination between reinforced particles and a base body of the thin-wall tubular product. The method has short procedure, labor saving of the processing mode, energy saving and environmental protection, simple process, low raw material cost, suitability for large-scale production and better popularization value, and can be widely applied to the preparation of high-strength light tubular products in the fields of aerospace, vehicles, advanced weapons and the like.

Description

technical field [0001] The invention relates to a method for preparing thin-walled pipes of particle-reinforced aluminum-based composite materials, which belongs to the field of preparation of thin-walled pipes of difficult-to-form materials. Background technique [0002] Particle-reinforced aluminum matrix composites have the advantages of high specific strength, high specific modulus, good wear resistance and dimensional stability, and are widely used in aerospace, automobile manufacturing, advanced equipment and other fields. Particle-reinforced aluminum matrix composite pipe fittings are lightweight, high-strength, high-modulus components, which can further reduce the weight of aerospace equipment, and are urgently needed in advanced weapons. After searching the existing technical literature, it is found that Chinese patents have not yet publicly reported the preparation method of the particle-reinforced aluminum matrix composite thin-walled pipe. [0003] The thin-wall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/14
Inventor 郭胜利李德富
Owner 有研金属复材技术有限公司
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