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High-strength aluminum alloy fin material as well as preparation method and application thereof

An aluminum alloy, high-strength technology, which is applied in the field of ultra-thin, high-temperature-resistant and high-strength aluminum alloy fin materials containing light and heavy rare earths and its preparation, can solve the problem of not describing the disadvantages of magnesium and copper, disadvantageous brazing performance, and reduced corrosion resistance, etc. problem, to achieve the effect of improving corrosion resistance, heat resistance, good corrosion resistance and good electrical conductivity

Inactive Publication Date: 2015-12-30
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is a multi-layer composite product, and excessive magnesium is added to the core layer alloy, which has an adverse effect on the brazing performance. At the same time, this patent also adds copper, which seriously reduces the corrosion resistance.
This patent uses the lining material to block the volatilization and diffusion of magnesium elements, and at the same time overcomes the adverse effects of high copper with the lining, but this material is suitable for multi-layer composite materials, and single-layer fin materials cannot overcome magnesium and copper strips. adverse effects from magnesium and copper, and the patent does not describe how to overcome the adverse effects of magnesium and copper

Method used

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  • High-strength aluminum alloy fin material as well as preparation method and application thereof
  • High-strength aluminum alloy fin material as well as preparation method and application thereof
  • High-strength aluminum alloy fin material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8 and comparative example 9-10

[0032] According to the alloy composition of Examples 1-8 shown in Table 1, the specific steps for smelting using a common aluminum alloy smelting process are as follows:

[0033] (1) The alloy is smelted according to the proportioning ratio, and cast into an ingot by a direct quenching casting method;

[0034] (2) hot rolling the product of step (1) after heat treatment annealing, annealing, and then cold rolling;

[0035] (3) Annealing to obtain the used state of the fin material.

[0036] in:

[0037] In step (1), in Examples 1 to 4, the casting speed of the ingot is 55mm / min, and the water velocity at the head of the ingot is 800m 3 / h, the water velocity at the tail of the ingot is 2500m 3 / h, the water velocity at the tail of the ingot is 2000m 3 / h;

Embodiment 5～8

[0038] In Examples 5-8, the casting speed of the ingot is 40mm / min, and the water velocity at the head of the ingot is 800m 3 / h, the water velocity at the tail of the ingot is 3000m 3 / h;

[0039] In step (2), in Examples 1-4, heat treatment and annealing at 480°C for 2 hours, after annealing, enter the rolling mill for hot rolling at 480°C, the final rolling temperature is 310°C, and the final thickness of hot rolling is 3mm; annealing before cold rolling, annealing The temperature is 360°C, and the time is 1h;

[0040] Examples 5-8, heat treatment and annealing at 500°C for 4 hours, after annealing, enter the rolling mill for hot rolling at 500°C, the final rolling temperature is 340°C, and the final thickness of hot rolling is 5mm; the annealing before cold rolling, the annealing temperature is 380°C, the time 4h;

[0041] In step (3):

[0042] Examples 1-4, the annealing time at 200°C is 2.5h; the pass processing rate of the cold-rolled finished product is 40%, and th...

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Abstract

The invention discloses a high-strength aluminum alloy fin material and a preparation method thereof. The high-strength aluminum alloy fin material comprises components in percentage by weight as follows: 0.6%-1.5% of Si, 0.8%-1.5% of Fe, 1.0%-1.5% of Mn, 1.0%-1.5% of Zn, 0.05%-0.3% of Y, 0.05%-0.3% of Sm and the balance of inevitable impurities and Al, wherein the content of the impurities is lower than or equal to 0.05%, and the high-strength aluminum alloy fin material can be used for manufacturing a heat exchanger. The high-strength aluminum alloy fin material has very high tensile strength and very good electric conductivity after brazing, the electric conductivity is 4-45 IACS (international annealed copper standard), and the corrosion resistance of the alloy is remarkably improved; after brazing, the tensile strength of the material is higher than 145 MPa, the brazing yield strength is higher than 55 MPa, and the heat resistance and the corrosion resistance are good; the electric potential of the fin material after brazing is about -730 mV-780 mV.

Description

technical field [0001] The invention relates to an ultra-thin high-temperature-resistant high-strength aluminum alloy fin material containing light and heavy rare earths for heat exchangers and a preparation method thereof. Background technique [0002] For products made of aluminum brazed sheets, especially brazed sheets or fins for heat exchangers, especially automotive applications, there is an increasing demand to reduce weight and cost. The aluminum heat exchanger is composed of aluminum alloy fin material brazed on the aluminum alloy material forming the working fluid channel. In order to improve the performance characteristics of the heat exchanger, as the basic characteristic of the aluminum alloy fin material, it is required to have a sacrificial anode effect , and prevent corrosion of the material forming the working fluid passage. In addition, in order to avoid deformation due to high-temperature brazing heating and penetration of brazing material, it is required...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/00C22C21/10C22F1/043C22F1/04C22F1/053F28F21/08
Inventor 陈仁宗黄元伟高勇进饶小华唐定骧丁冬雁唐劲松尤小华
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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