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Semi-continuous casting method for in-situ particle reinforced aluminum-based composite

A particle-reinforced aluminum and composite material technology, applied in the field of composite material forming, can solve the problems of difficulty in preparing large-size ingots with fine grains, uniform particle distribution, and difficulty in popularization and application, so as to avoid ingot cracking, uniform distribution, and reduce The effect of temperature gradients

Active Publication Date: 2017-01-04
ALUMICS MATERIALS INSTIUTUTE ANHUI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent is based on KBF 4 、K 2 TiF 6 React with aluminum to prepare in-situ particle-reinforced aluminum-matrix composites. In this patent, the in-situ particle-reinforced aluminum-matrix composite is poured into a mold to obtain an aluminum-matrix composite ingot. Limited by the size of the mold and the cooling capacity of the mold, it is difficult to To prepare large-sized ingots with fine grains and uniform particle distribution, the technical solution disclosed in this patent application is difficult to popularize and apply in large-scale industrial production

Method used

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  • Semi-continuous casting method for in-situ particle reinforced aluminum-based composite

Examples

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Effect test

Embodiment 1

[0027] This example relates to a semi-continuous casting method for in-situ particle reinforced aluminum matrix composites, specifically to prepare 5% TiB with a diameter of 250mm 2 / 7075 in-situ particle reinforced aluminum matrix composite cast rod.

[0028] The method of this embodiment is a schematic diagram of the device structure used as figure 1 As shown in the figure, 1 is the ultrasonic processor, 2 is the composite material melt, 3 is the refractory material, 4 is the crystallizer, 5 is the graphite ring, 6 is the cooling water, 7 is the wiper board, 8 is the composite material casting Rod, 9 is a heating furnace, and 10 is a dummy head. The method for semi-continuous casting using the device comprises the steps:

[0029] 5% TiB 2 / 7075 in-situ particle reinforced aluminum matrix composite material is melted and kept at 720°C;

[0030] The composite material melt 2 is injected into the crystallizer 4, and at the same time, the ultrasonic processor 1 is used for u...

Embodiment 2

[0036] This example relates to a semi-continuous casting method for in-situ particle reinforced aluminum matrix composites, specifically to prepare 8% TiB with a diameter of 450mm 2 / 7050 in-situ particle reinforced aluminum matrix composite cast rod.

[0037] The method of the present embodiment comprises the steps:

[0038] 5% TiB 2 / 7075 in-situ particle reinforced aluminum matrix composite material is melted and kept at 785°C;

[0039] Inject the composite material melt into the crystallizer, and start the ultrasonic treatment at the same time, the ultrasonic frequency is 18kHz; the power is 1kW;

[0040] When the melt solidifies and crusts at the graphite ring, the dummy head descends at a speed of 40mm / min, and at the same time, the cooling water is turned on to cool the cast rod. The cooling water temperature is 32°C and the water pressure is 0.2MPa;

[0041] The wiper starts to contact the surface of the casting rod at 25mm below the graphite ring, scraping the cool...

Embodiment 3

[0045] This example relates to a semi-continuous casting method for in-situ particle reinforced aluminum matrix composites, specifically to prepare 10% TiB with a diameter of 800mm 2 / 7055 in-situ particle reinforced aluminum matrix composite cast rod.

[0046] The method of the present embodiment comprises the steps:

[0047] 10% TiB 2 / 7055 in-situ particle reinforced aluminum matrix composite material is melted and kept at 850°C;

[0048] Inject the composite material melt into the crystallizer, and start the ultrasonic treatment at the same time, the ultrasonic frequency is 23kHz, and the power is 1.5kW;

[0049] When the melt solidifies and crusts at the graphite ring, the dummy head descends at a speed of 60mm / min, and at the same time, the cooling water is turned on to cool the cast rod. The cooling water temperature is 40°C and the water pressure is 0.3MPa;

[0050] The wiper starts to contact the surface of the casting rod at 35mm below the graphite ring, scraping ...

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Abstract

The invention relates to a semi-continuous casting method for an in-situ particle reinforced aluminum-based composite and belongs to the technical field of composite forming. The method includes the following steps that an in-situ ceramic particle reinforced aluminum-based composite is taken, melted and subjected to heat preservation to obtain composite melt; the composite melt is injected into a crystallizer, and meanwhile ultrasonic treatment is carried out; when the melt is solidified at the position of a graphite annulus, a dummy bar head descends, and meanwhile cooling water is started to cool a cast rod; when the dummy bar head descends to the position of a scraper blade, the scraper blade starts to make contact with the surface of the cast rod, and the cooling water is scraped away from the surface of the cast rod; along with descending of the dummy bar head, the cast rod slowly enters a heating furnace to be annealed; and the cast rod is hoisted after casting is completed, and an aluminum-based composite semi-continuous cast rod is obtained. The method is simple in device, easy and convenient to operate and suitable for large-scale industrial production of the aluminum-based composite, and has good practical application value, and large-size in-situ particle reinforced aluminum-based composite cast ingots with fine crystal particles and evenly-distributed particles can be prepared.

Description

technical field [0001] The invention relates to the technical field of composite material forming, in particular to a semi-continuous casting method for in-situ particle reinforced aluminum-based composite materials. Background technique [0002] Aluminum matrix composites have high specific strength, high specific modulus and high specific stiffness, and are widely used in aerospace, national defense, industry and other fields. According to different processing techniques, particle reinforced aluminum matrix composites can be divided into particle reinforced cast aluminum matrix composites and particle reinforced deformed aluminum matrix composites. The strength and elongation of deformed aluminum matrix composites are obviously higher than those of cast aluminum matrix composites. The preparation process of the deformed aluminum matrix composite material is to first obtain the composite material ingot by casting, and then obtain the composite material profile, forging, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/114B22D11/049C22F1/04
Inventor 陈东李险峰张亦杰马乃恒王浩伟夏存娟
Owner ALUMICS MATERIALS INSTIUTUTE ANHUI CO LTD
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