Prepn process of in-situ grain reinforced anticorrosive cast alumium-base composite material

An aluminum-based composite material and particle-reinforced technology, which is applied to the preparation field in the field of material technology, can solve the problems of low specific strength and specific modulus, restricted use, etc., and achieves low cost, specific strength and specific stiffness, and simple preparation process Effect

Inactive Publication Date: 2006-03-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation method of the material is simple, and the material has certain corrosion resistance and good casting performance, the specific strength and specific modulus of the material are relatively low, which limits its use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The mass percentage composition of the prepared ingredients is 9.5% Mg, 1.0% Zn, 0.1% Be, 0.2% Ti, 1% TiB 2 , and the rest are corrosion-resistant cast aluminum matrix composites of Al.

[0016] The preparation process is as follows:

[0017] Put the industrial pure aluminum ingot into the crucible, raise the temperature to 680°C, add a covering agent to cover the melt, remove the covering agent after melting, and dry the KFB with a mass ratio of 1:1.5 4 、KTiF 6 Mix evenly and add to the melt, stir, stirring speed 200rpm, stirring time 30min, take out by-products, add Al-Be master alloy, Al-Ti master alloy, cover, pass in protective gas CO 2 , lower the temperature to 680°C, add industrial pure Mg, Al-Zn intermediate alloy, cover, stir for 10 minutes, vacuumize and stand at 680°C for 15 minutes, break the vacuum, continue to pass the protective gas, remove slag, and assemble The middle partition, liquid riser, mold, metal mold temperature is 25°C, low-pressure formin...

Embodiment 2

[0022] The mass percentage composition of the prepared ingredients is 7.5% Mg, 1.5% Zn, 0.03% Be, 0.1% Ti, 20% TiB 2 , and the rest are corrosion-resistant cast aluminum matrix composites of Al.

[0023] The preparation process is as follows:

[0024] Put the industrial pure aluminum ingot into the crucible, raise the temperature to 800°C, add a covering agent to cover the melt, remove the covering agent after melting, and dry the KFB with a mass ratio of 1:1.5 4 、KTiF 6 Mix evenly and add to the melt, stir, stirring speed 500rpm, stirring time 20min, take out by-products, add Al-Be master alloy, Al-Ti master alloy, cover, pass in protective gas N 2 , lower the temperature to 730°C, add industrial pure Mg, Al-Zn master alloy, cover, stir for 20 minutes, vacuumize and stand at 730°C for 5 minutes, break the vacuum, continue to pass the protective gas, remove slag, and assemble The middle partition, liquid riser, and mould, the metal mold temperature is 400°C, and the low-pre...

Embodiment 3

[0030] The mass percentage composition of the prepared ingredients is 8.9% Mg, 1.2% Zn, 0.02% Be, 0.1% Ti, 10% TiB 2 , and the rest are corrosion-resistant cast aluminum matrix composites of Al.

[0031] The preparation process is as follows:

[0032] Put the industrial pure aluminum ingot into the crucible, raise the temperature to 780°C, add a covering agent to cover the melt, remove the covering agent after melting, and dry the KFB with a mass ratio of 1:1.5 4 、KTiF 6 Mix evenly and add to the melt, stir, stirring speed 300rpm, stirring time 20min, take out the by-products, add Al-Be master alloy, Al-Ti master alloy, cover, pass in protective gas Ar 2, lower the temperature to 720°C, add industrial pure Mg, Al-Zn intermediate alloy, cover, stir for 15 minutes, vacuumize and stand at 720°C for 10 minutes, break the vacuum, continue to pass the protective gas, remove slag, and assemble The middle partition, liquid riser, mold, metal mold temperature is 200°C, low-pressure ...

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Abstract

The in-situ grain reinforced anticorrosive cast aluminum-base composite material consists of Mg 7.5-9.5 wt%, Zn 1.0-1.5 wt%, Be 0.03-0.1 wt%, Ti 0.1-0.2 wt% and TiB2 1-20 wt% except Al. The preparation process includes the following steps: 1. smelting industrial pure aluminum in crucible inside a resistive furnace, heating and covering with covering agent; 2. mixing KFB4 and KTiF6, stoving and adding into the melt via stirring; 3. taking out the side product after reaction, adding Al-Be intermediate alloy and Al-Ti intermediate alloy, and covering; 4. leading protecting gas to over the crucible liquid; 5. lowering the temperature of the molten alloy, adding industrial pure Mg and Al-Zn intermediate alloy, stirring, scumming, pumping vacuum and letting stand; and 6. low pressure casting formation. The composite material of the present invention has excellent anticorrosive strength, high plasticity and high modulus, and the present invention is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method in the technical field of materials, in particular to a preparation method of an in-situ particle reinforced corrosion-resistant cast aluminum-based composite material. Background technique [0002] Cast aluminum alloy is corrosion-resistant, low in density, and has certain specific strength and specific stiffness. Some important structures on the ship, such as radar bases, boxes, portholes, handles, engines and electrical components, etc., use cast alloys to reduce the weight of the ship to improve speed and stability. At present, there are two main types of cast aluminum alloys widely used on ships: one is Al-Si series cast aluminum alloys (such as ZL101) with good casting process performance and good corrosion resistance; Al-Mg cast aluminum alloys (ZL301, ZL305) that are resistant to seawater corrosion but have relatively poor casting process performance. These materials generally have certain corrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/10C22C21/06
Inventor 王浩伟马乃恒易宏展李险峰张亦杰
Owner SHANGHAI JIAO TONG UNIV
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