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Reinforced aluminum alloy composite board and preparation method thereof

A technology of aluminum alloy sheet and composite sheet, which is applied in the field of aluminum alloy materials, can solve the problems of poor plasticity of eutectic aluminum-silicon alloy materials, inability to carry out large deformation amount, plasticity decline, etc., and achieve good fluidity, good diffusion and fusion effect, The effect of increasing hardness

Active Publication Date: 2019-11-15
龙泉市万嘉铝业型材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain a good interface composite effect and forming effect, the processing of composite plates requires multi-pass rolling. During multi-pass rolling, there are obvious undulations between layers, and even necking and fracture begin to appear. The manufacturing process requires that the cast aluminum alloy material has good plasticity and high elongation, but the eutectic aluminum-silicon alloy material with a silicon content greater than 7% has poor plasticity. Although the strength increases with the increase in the silicon content, the plasticity decreases significantly. Rolling with a large amount of deformation cannot be performed, so high-performance eutectic aluminum-silicon alloys cannot be used for the preparation of strengthened aluminum alloy composite plates

Method used

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  • Reinforced aluminum alloy composite board and preparation method thereof
  • Reinforced aluminum alloy composite board and preparation method thereof
  • Reinforced aluminum alloy composite board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Prepare the reinforced aluminum alloy composite plate as follows:

[0035] 1. Raw material preparation and prefabrication:

[0036] The upper and lower aluminum alloy plates are made of suction cast eutectic aluminum-silicon alloy plates with the same thickness, with a thickness of 6.5mm. The chemical composition of the aluminum-silicon alloy material is: 2wt% Si, 0.3wt% lanthanum, 0.4wt% Cu, 0.6wt% Cr, 2.5wt%Mg, 0.1wt%Ti, 0.04wt%B, the balance is Al; the eutectic aluminum-silicon alloy sheet melting and casting process uses 0.3wt% composite sodium salt of the melt as the modifier, and vacuum suction casting after conventional melting and modification treatment Got. Some rare earth elements can significantly improve the effect of refinement and deterioration, improve mechanical properties, and increase the plasticity of aluminum alloy materials.

[0037] The brazing filler metal is composed of the following mass fractions of raw materials: 6wt% BN, 8wt% Si 3 N 4 ,...

Embodiment 2

[0050] Example 2: Prepare the reinforced aluminum alloy composite plate as follows:

[0051] 1. Raw material preparation and prefabrication:

[0052] The upper and lower aluminum alloy plates are made of suction-cast eutectic aluminum-silicon alloy plates with the same thickness, with a thickness of 16mm. The chemical composition of the aluminum-silicon alloy material is: 23wt% Si, 0.5wt% erbium, 1.5wt% Cu, 0.9wt% Cr, 4.9 wt% Mg, 0.5 wt% Ti, 0.22 wt% B, the balance is Al; the eutectic aluminum-silicon alloy sheet melting and casting process uses 0.3wt% composite sodium salt of the melt as the modifier, and it is made by vacuum suction casting after conventional melting and modification treatment .

[0053] The brazing filler metal is composed of the following mass fractions of raw materials: 13wt% BN, 10wt% Si 3 N 4 , 5wt% AlN, 5wt% TiO 2 , 1wt% VC, 5.5wt% SiC, other elements are impurities, the content of individual elements in other elements ≤0.01wt%, the total amount of impuritie...

Embodiment 3

[0066] Example 3: Prepare the reinforced aluminum alloy composite plate as follows:

[0067] 1. Raw material preparation and prefabrication:

[0068] The upper and lower aluminum alloy sheets are made of suction-cast eutectic aluminum-silicon alloy sheets with the same thickness, with a thickness of 10mm. The chemical composition of the aluminum-silicon alloy material is: 12wt% Si, 0.4wt% neodymium, 1wt% Cu, 0.75wt% Cr, 3.7wt %Mg, 0.3wt%Ti, 0.13wt%B, and the balance is Al; the eutectic aluminum-silicon alloy plate melting and casting process adopts 0.3wt% composite sodium salt of the melt as the modifier, and is prepared by vacuum suction casting after conventional melting and modification treatment.

[0069] The brazing filler metal is composed of the following mass fractions of raw materials: 9.5wt% BN, 9wt% Si 3 N 4 , 3.5wt% AlN, 4wt% TiO 2 , 0.75wt% VC, 3.5wt% SiC, other elements are impurities, the content of a single element in other elements ≤0.01wt%, the total amount of impur...

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Abstract

The invention discloses a reinforced aluminum alloy composite board and a preparation method thereof. A suction cast 2-23wt% eutectic aluminum-silicon alloy board is fully utilized to cover aluminum-silicon alloy materials of the vast majority of marks, and the components of the aluminum alloy board have little influence on the overall tensile strength and yield strength of the composite board. Tough skeleton sintering embedment is carried out on the surfaces of both upper layer and lower layer eutectic aluminum-silicon alloy boards, and multiple parallel tough skeletons are formed on the surface, after welding of the upper and lower boards, the tough skeletons are in an included angle of 45-90 degrees, thus achieving complementation to improve the tensile strength and yield strength. A clip solder is employed for welding two boards by welding process without rolling, the component interface has good diffusion and fusion effect, and the overall integration degree is high. An Al-Ni cladding layer can improve the wear resistance and corrosion resistance of the composite board so as to protect the inner composite board substrate. Therefore, the reinforced aluminum alloy composite board can be applicable to various working conditions.

Description

Technical field [0001] The invention relates to the field of aluminum alloy materials, in particular to a reinforced aluminum alloy composite plate and a preparation method thereof. Background technique [0002] The performance of a single aluminum alloy material is single, and the improvement of its mechanical properties is limited by improving the casting process and post-casting processing technology. In order to further enhance the strength of aluminum alloy materials, laminated aluminum alloy composite materials have gradually developed into a high-performance, low-cost excellent aluminum alloy alternative material, which can reduce the amount of alloy used under the premise of meeting the strength of use, and can also be used in With the same amount of aluminum alloy used, the mechanical properties are greatly improved. The performance of the laminated aluminum alloy composite board has the superiority that any component can't compare, and it is a combination of multiple ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B3/08B32B37/00B32B33/00C22C21/02C22C21/08C22C21/00C22C32/00C22C29/02C23C4/06C23C4/129C22C30/00C22C19/05C23C4/18
CPCB32B15/016B32B3/08B32B37/00B32B33/00C22C21/02C22C21/08C22C21/003C22C32/0005C22C26/00C23C4/06C23C4/129C22C30/00C22C19/058C23C4/18C22C2026/005C22C2026/006C22C2026/008B32B2307/554B32B2307/714B32B2307/306B32B2307/54
Inventor 伍和龙孙道妹赵文娟吴辉
Owner 龙泉市万嘉铝业型材有限公司