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Multilayer composite belt for brazing type heat exchanger and manufacturing method thereof

A multi-layer composite and heat exchanger technology, applied in the direction of chemical instruments and methods, layered products, metal layered products, etc., can solve the problem of affecting the service life of heat exchangers, and heat exchangers whose anti-corrosion performance cannot reach high quality and other problems, to achieve the effect of ensuring service life, improving service life and improving corrosion resistance

Active Publication Date: 2011-02-16
YINBANG CLAD MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Heat exchangers include radiators, intercoolers, condensers, evaporators and oil coolers, etc., see figure 1 At present, most of the raw materials used in heat exchangers include three-layer composite brazing aluminum strips, a core layer 2, a layer of anti-corrosion layer 3, and a layer of brazing alloy layer 1. Due to the increasing requirements for heat exchangers, exposed The anti-corrosion performance on the outside or refrigerant side does not meet the requirements of high-quality heat exchangers, thus affecting the service life of heat exchangers

Method used

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  • Multilayer composite belt for brazing type heat exchanger and manufacturing method thereof
  • Multilayer composite belt for brazing type heat exchanger and manufacturing method thereof
  • Multilayer composite belt for brazing type heat exchanger and manufacturing method thereof

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Embodiment Construction

[0018] See figure 2 , a multilayer composite strip for a brazed heat exchanger, which includes a core alloy layer 2, and is covered with an anti-corrosion layer alloy layer 3 and a brazing alloy layer 1 on both sides of the core layer alloy layer 2, and on the anti-corrosion layer The outer side of the alloy layer 3 covers the brazing alloy layer 4 . See Table 1, the ratio of core layer alloy is 45%-70% (thickness composite ratio), the ratio of anti-corrosion layer alloy is 10%-35% (thickness composite ratio), and the ratio of brazing alloy is 5%-10% ( Thickness composite ratio); the core layer alloy is Al-Mn or Al-Mn-Mg alloy; the anti-corrosion layer alloy is pure aluminum alloy AA1050, AA1145 or AA7072 alloy; the brazing alloy is Al-Si alloy.

[0019] Table 1

[0020] alloy layer

Alloy (AA)

Composite ratio (%)

Brazing Layer Alloy Layer

4045 or 4343

5-10%

Anti-corrosion layer alloy layer

1145 or 7072

20-35%

core alloy la...

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Abstract

The invention provides a multilayer composite belt for a brazing type heat exchanger and a manufacturing method thereof. The multilayer composite belt for a brazing type heat exchanger manufactured by the method has greater anticorrosion performance, improves the service life of the heat exchanger and meets the requirement of high quality heat exchanger. The multilayer composite belt for a brazing type heat exchanger comprises a core alloy layer, wherein two sides of the core alloy layer are respectively coated with an anticorrosive alloy layer and a brazing alloy layer. The invention is characterized in that a brazing alloy layer is coated on the external side of the anticorrosive alloy layer is coated with a brazing alloy layer. The manufacturing method comprises the following steps of: preparing the core alloy, anticorrosive alloy and brazing alloy panel veneers by smelting, casting, face-milling, heating, hot rolling and rolling; combining the panel veneers, heating the combined panel veneers to 450-550 DEG C in a heat furnace, hot-rolling - compositing and cutting to obtain the multilayer composite belt.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a multilayer composite strip for a brazed heat exchanger and a manufacturing method thereof. Background technique [0002] Heat exchangers include radiators, intercoolers, condensers, evaporators and oil coolers, etc., see figure 1 At present, most of the raw materials used in heat exchangers include three-layer composite brazing aluminum strips, a core layer 2, a layer of anti-corrosion layer 3, and a layer of brazing alloy layer 1. Due to the increasing requirements for heat exchangers, exposed The anti-corrosion performance on the outside or on the refrigerant side cannot meet the requirements of high-quality heat exchangers, thus affecting the service life of the heat exchangers. Contents of the invention [0003] In view of the above problems, the present invention provides a multi-layer composite strip for an aluminum brazed heat exchanger and a manufacturing me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/26B32B15/01
Inventor 沈健生
Owner YINBANG CLAD MATERIAL
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