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High corrosion resistant aluminum alloy for condensation fuel gas aluminum casting boiler heat exchanger

A heat exchanger and aluminum alloy technology, applied in the field of high corrosion-resistant aluminum alloys, can solve the problems of poor wear resistance, poor corrosion resistance, low silicon, etc., and achieve the effect of high mechanical properties and good mechanical properties

Active Publication Date: 2017-09-15
ZHEJIANG INOVISEN THERMAL ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has certain corrosion resistance and high tensile strength properties, but because of its relatively low silicon content, the overall corrosion resistance is relatively poor; and it is mainly used in air conditioners and automotive heat exchangers , compared with the heat exchanger on the gas wall-hung boiler, it has higher requirements on anti-corrosion performance and poor wear resistance

Method used

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  • High corrosion resistant aluminum alloy for condensation fuel gas aluminum casting boiler heat exchanger
  • High corrosion resistant aluminum alloy for condensation fuel gas aluminum casting boiler heat exchanger

Examples

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Effect test

Embodiment 1

[0018] In this embodiment, the high corrosion-resistant aluminum alloy used for the heat exchanger of the wall-hung boiler condensing gas cast aluminum boiler includes the following components in mass percentage:

[0019] Si: 9.0wt%; Mg: 0.45wt%; Fe: 0.55wt%; Cu: 0.03wt%; Mn: 0.45wt%; Ni: ≤0.05wt%; Ti: ≤0.05wt%; the balance is aluminum; Contains unavoidable impurities.

[0020] The aluminum alloy can be directly processed into materials such as wall-hung boiler heat exchangers or subsequent connecting pipes (such as flue gas or loop pipes of wall-hung boilers).

[0021] The aluminum alloy can be processed by the following methods:

[0022] Select materials according to the mass ratio of the above raw materials, preheat pure Al, pure Fe, pure Si, pure copper, pure magnesium, pure silver, pure Ni, Al-Mn master alloy, the preheating temperature is 130 ℃ ~ 150 ℃, after preheating, break the pure silicon into small pieces of about 10mm, then wrap it in aluminum foil and preheat a...

Embodiment 2

[0025] In this embodiment, the high corrosion-resistant aluminum alloy used for the heat exchanger of the wall-hung boiler condensing gas cast aluminum boiler includes the following components in mass percentage:

[0026] Si: 12wt%; Mg: 0.20wt%; Fe: 0.25wt%; Cu: 0.05wt%; Mn: 0.15wt%; Ni: 0.03wt%; Ti: 0.02wt%; of impurities.

[0027] The specific preparation method of the aluminum alloy in this embodiment is the same as that in Embodiment 1, and will not be repeated here.

Embodiment 3

[0029] In this embodiment, the high corrosion-resistant aluminum alloy used for the heat exchanger of the wall-hung boiler condensing gas cast aluminum boiler includes the following components in mass percentage:

[0030] Si: 10wt%; Mg: 0.305wt%; Fe: 0.35wt%; Cu: 0.04wt%; Mn: 0.20wt%; Ni: 0.04wt%; Ti: 0.03wt%; Impurities.

[0031] The specific preparation method of the aluminum alloy in this embodiment is the same as that in Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a high corrosion resistant aluminum alloy for a condensation fuel gas aluminum casting boiler heat exchanger and belongs to the technical field of heat exchange materials. The problem of the short service life due to the fact that an existing aluminum alloy for the condensation fuel gas aluminum casting boiler heat exchanger cannot have both corrosion resistance and abrasion resistance simultaneously is solved. The high corrosion resistant aluminum alloy for the wall-mounted boiler condensation fuel gas aluminum casting boiler heat exchanger comprises the components, by weight, of 9.0%-12% of Si, 0.20%-0.45% of Mg, 0.25%-0.55% of Fe, 0.03%-0.05% of Cu, 0.15%-0.45% of Mn, no more than 0.05% of Ni, no more than 0.05% of Ti and the balance aluminum. By adding elements of the copper, the nickel and the like into the aluminum alloy, good flowability and airtightness are achieved; the corrosion resistance of the alloy can be further improved by adding the silicon with the high content; and by adding the manganese element, monocrystal Si in the alloy can be modified in the solidification process, and the high abrasion resistance can be achieved.

Description

technical field [0001] The invention relates to a high corrosion-resistant aluminum alloy used for a heat exchanger of a condensing gas cast aluminum boiler, belonging to the technical field of heat exchange materials. Background technique [0002] The heat exchanger of the core component of the condensing gas wall-hung boiler is cast aluminum material, which integrates the combustion chamber, the flue, and the water channel. Although the heat-absorbing column in the cast state has a large heat exchange area, the quality and thickness of the material used in the manufacture of the wall and the assembly method of various components must be satisfied, so that during a reasonable life and normal installation and Under the conditions of use, there will be no significant changes in the structure and operating characteristics; in particular, the heat exchanger, the core component of the wall-hung boiler, and all components of the combustion (flue gas) circuit should withstand the ...

Claims

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Application Information

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IPC IPC(8): C22C21/02
CPCC22C21/02
Inventor 姜宇光
Owner ZHEJIANG INOVISEN THERMAL ENERGY TECH CO LTD
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