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In-situ grain reinforced anticorrosive cast composite aluminium-base material

An aluminum-based composite material and particle-reinforced technology, applied in the field of aluminum-based composite materials, can solve the problems of low specific strength and specific modulus, and achieve low cost, good specific strength, and good aging stability

Inactive Publication Date: 2007-04-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] After searching the literature of the prior art, it was found that Zhang Linhe and Zhou Hua published "Research on the Corrosion Performance of New Ship Aluminum Alloy Casting" in "Aluminum Processing" 2002, 25(2): 38-40. The materials are ZL101, ZL305 and Al-Mg-Si alloy (1.32% Mg, 1.8% Si, 0.35% Mn, 0.16% Cr), these materials have certain corrosion resistance, but the specific strength and specific modulus of these materials are relatively lower, limiting its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In-situ particle-reinforced corrosion-resistant cast aluminum-based composite material weight percent: 9.5% Mg, 1.0% Zn, 0.1% Be, 0.2% Ti, 1% TiB 2 , and the rest are Al.

[0015] Preparation of composite materials: aluminum is melted in a crucible, KFB 4 、KTiF 6 The reaction salt is added into the melt and stirred, the by-products are taken out, and Al-Be, Al-Ti, Mg, Al-Zn are added, stirred evenly and then formed under low pressure.

[0016] TiB in composite 2 The size of the particles is 25-250nm, the shape of the particles is mainly hexagonal and cuboid, and the particles are evenly distributed in the matrix. TiB 2 The interface with the substrate is clean, there is no interface reaction, and the combination is good.

[0017] Material T4 state room temperature mechanical properties:

[0018] σ b =335MPa, σ 0.2 =266MPa, δ=4.8%, E=77.2GPa,

[0019] After 18 months of natural aging:

[0020] σ b =349MPa, σ 0.2 =274MPa, δ=4.7%, E=78.1GPa.

Embodiment 2

[0022] In-situ particle-reinforced corrosion-resistant cast aluminum-based composite material weight percent: 7.5% Mg, 1.5% Zn, 0.03% Be, 0.1% Ti, 20% TiB 2 , and the rest are Al.

[0023] Preparation of composite materials: aluminum is melted in a crucible, KFB 4 、KTiF 6 The reaction salt is added into the melt and stirred, the by-products are taken out, and Al-Be, Al-Ti, Mg, Al-Zn are added, stirred evenly and then formed under low pressure.

[0024] TiB in composite 2 The size of the particles is 25-250nm, the shape of the particles is mainly hexagonal and cuboid, and the particles are evenly distributed in the matrix. TiB 2 The interface with the substrate is clean, there is no interface reaction, and the combination is good.

[0025] Material T4 state room temperature mechanical properties:

[0026] σ b =362MPa, σ 0.2 =289MPa, δ=1.9%, E=92.5GPa,

[0027] After 18 months of natural aging:

[0028] σ b =373MPa, σ 0.2 =297MPa, δ=1.9%, E=92.3GPa.

Embodiment 3

[0030] In-situ particle-reinforced corrosion-resistant cast aluminum-based composite material composition weight percent: 8.9% Mg, 1.2% Zn, 0.02% Be, 0.1% Ti, 10% TiB 2 , and the rest are Al.

[0031] Preparation of composite materials: aluminum is melted in a crucible, KFB 4 、KTiF 6 The reaction salt is added into the melt and stirred, the by-products are taken out, and Al-Be, Al-Ti, Mg, Al-Zn are added, stirred evenly and then formed under low pressure.

[0032] TiB in composite 2 The size of the particles is 25-250nm, the shape of the particles is mainly hexagonal and cuboid, and the particles are evenly distributed in the matrix. TiB 2 The interface with the substrate is clean, there is no interface reaction, and the combination is good.

[0033] Material T4 state room temperature mechanical properties:

[0034] σ b =353MPa, σ 0.2 =277MPa, δ=2.9%, E=83.8GPa,

[0035] After 18 months of natural aging:

[0036] σ b =366MPa, σ 0.2 =283MPa, δ=2.8%, E=84.1GPa.

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Abstract

The present invention relates to material technology, and 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 composite material of the present invention has reinforcing TiB2 grains with size of 50-250 nm and in hexagon and rectangle mainly. The composite material has clean interface and excellent combination between the matrix and the TiB2 grains, tensile strength of 335-362 MPa and modulus of 77.2-92.5 GPa in the initial stage after preparation, and tensile strength of 349-373 MPa and modulus of 78.1-92.3 GPa after ageing for 18 months. The composite material has simple preparation process and low cost, is suitable for industrial production, and may find its wide application in ship structure members.

Description

technical field [0001] The invention relates to an aluminum-based composite material in the field of materials, in particular to an in-situ particle-reinforced corrosion-resistant casting aluminum-based composite material. Background technique [0002] Cast aluminum alloy is corrosion-resistant, low 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, are made of cast alloys to reduce the weight of the ship. Increased 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. [0003] After searching the literature of the prior art, it w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06
Inventor 易宏展王浩伟马乃恒李险峰陈东
Owner SHANGHAI JIAO TONG UNIV
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