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High-strength corrosion-resistant rare earth aluminum alloy with high copper content and its preparation method and application

An aluminum alloy and content technology, which is applied to high-strength corrosion-resistant rare-earth aluminum alloys with high copper content and the fields of preparation and application thereof, can solve the problem that the alloy strength and corrosion resistance of heat transfer products cannot meet the increasing requirements, and the corrosion resistance performance is not stable. Carry out related researches, unsuitable for heat transfer materials and other issues, to achieve the effect of inhibiting galvanic corrosion, good corrosion resistance and high solubility

Active Publication Date: 2018-05-01
HUAFON NIKKEI ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the strength and corrosion resistance of the products of aluminum foil alloy manufacturers at home and abroad are poor after brazing, and most of them still use AA3003 aluminum alloy to produce heat transmission materials, and the yield strength value after brazing is only about 45MPa.
[0004] Patent CN 104271289A discloses a new HT aluminum alloy body and its preparation method. This aluminum alloy contains high Mg content. During brazing, the high Mg content is easy to diffuse and cause blackening of the material, which is not suitable for heat transmission materials. Moreover, the corrosion resistance performance has not been studied, and it cannot meet the increasing requirements of heat transmission products for alloy strength and corrosion resistance.

Method used

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  • High-strength corrosion-resistant rare earth aluminum alloy with high copper content and its preparation method and application
  • High-strength corrosion-resistant rare earth aluminum alloy with high copper content and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation:

[0031] (1) Proportioning the alloy according to the composition of Example 1 in Table 1, smelting by a common aluminum alloy smelting process, and casting into a plate-shaped ingot;

[0032] (2) Then the ingot is homogenized and annealed at 500°C for 14 hours;

[0033] (3) cutting and milling the ingot to remove the riser and the skin;

[0034] (4) After face milling, heat to 470°C in an annealing furnace, keep warm for 3h, and carry out hot rolling. The final rolling temperature is 310°C, and the rolling thickness is 4mm;

[0035] (5) Cold rolling, the processing rate of the finished product is 30%, and the rolling thickness is 50 μm;

[0036] (6) Then anneal at 360°C for 2h.

Embodiment 2

[0038] (1) Proportioning the alloy according to the composition of Example 2 in Table 1, smelting by a common aluminum alloy smelting process, and casting into a plate-shaped ingot;

[0039] (2) Then the ingot is homogenized and annealed at 550°C for 12 hours;

[0040] (3) cutting and milling the ingot to remove the riser and the skin;

[0041] (4) After face milling, heat to 500°C in an annealing furnace, keep warm for 2h, and carry out hot rolling. The final rolling temperature is 340°C, and the rolling thickness is 3mm;

[0042] (5) Cold rolling, the processing rate of the finished product is 40%, and the rolling thickness is 80 μm;

[0043] (6) Then anneal at 380°C for 1h.

Embodiment 3

[0045] (1) The alloy is proportioned according to the composition of Example 3 in Table 1, melted by a common aluminum alloy melting process, and cast into a plate-shaped ingot;

[0046] (2) Then the ingot is homogenized and annealed at 530°C for 13 hours;

[0047] (3) cutting and milling the ingot to remove the riser and the skin;

[0048] (4) After face milling, heat to 480°C in an annealing furnace, hold for 2 hours, and carry out hot rolling. The final rolling temperature is 320°C, and the rolling thickness is 3.5mm;

[0049] (5) Cold rolling, the processing rate of the finished product is 40%, and the rolling thickness is 60 μm;

[0050] (6) Then anneal at 370°C for 1.5h.

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Abstract

The invention discloses a high-copper-content high-corrosion-resistance rare earth aluminum alloy and a preparation method and application thereof. The aluminum alloy is prepared from, by weight, 0.3-1.5% of Si, smaller than 0.7% of Fe, 0.8-1.2% of Cu, 0.8-1.8% of Mn, 0.1-0.3% of Zn, one or two of 0.15-0.3% of Sm or 0.15-0.3% of Y, and the balance unavoidable impurities and Al. According to the high-copper-content high-corrosion-resistance rare earth aluminum alloy, the number of needle holes in aluminum foil materials can be significantly reduced, the yield of the heat exchanger aluminum foil materials is improved, and the tensile strength, yield strength and droop resistance of the alloy are improved.

Description

technical field [0001] The invention relates to an aluminum alloy containing rare earth elements and a manufacturing method thereof. Background technique [0002] In recent years, transportation systems, engineering cooling systems, and domestic and commercial refrigeration equipment have increasingly pursued emission reduction, consumption reduction, and environmental protection, and their related products and components have also increasingly pursued light weight, high efficiency, and low cost. Especially for brazing thin plates or fins used in automotive heat exchangers, most manufacturers are developing narrower (width), shorter (height), and thinner (wall thickness) porous flat tube designs. In order to realize the compactness and high efficiency of the heat exchanger. However, lighter weight, higher efficiency, and lower cost put forward higher requirements for the mechanical properties and corrosion resistance of brazed sheets and fins. Aluminum alloys with high stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/18C22C21/02C22C21/00C22C1/02C22F1/057C22F1/043C22F1/04
CPCC22C1/026C22C21/00C22C21/02C22C21/14C22C21/18C22F1/04C22F1/043C22F1/057
Inventor 饶小华陈仁宗高勇进黄元伟丁冬雁唐劲松尤小华
Owner HUAFON NIKKEI ALUMINUM
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