Al-Mn pipe alloy of household air conditioner heat exchanger and preparation method of Al-Mn pipe alloy

A heat exchanger, al-mn technology, applied in the field of alloy and its preparation of Al-Mn alloy pipes for household air-conditioning heat exchangers, can solve the problems of pitting and perforation of pipes, poor processability and poor corrosion resistance of aluminum pipes, and achieve Improving mechanical properties, good surface quality, and improving product quality

Inactive Publication Date: 2020-06-05
河南誉金技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The aluminum alloy traditionally used to manufacture heat exchanger tubes is 3003 alloy, but the disadvantage of 3003 alloy tubes is that it has poor corrosion resistance in corrosive media, and the tubes are prone to pitting and perforation; on the other hand, the aluminum tube made of 3003 has poor processability , during the large-angle bending process of the heat exchanger, it is easy to appear orange peel at the "U" bend, and even crack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An Al-Mn pipe alloy for a household air conditioner heat exchanger, the composition of which is by weight percentage: Mn 0.7%, Mg 0.3%, Zn 0.2%, Fe 0.2%, Si 0.1%, Cu 0.04%, Ti 0.1%, Cr 0.1 %, Zr 0.08%, the balance is Al and impurities, of which the impurity content is ≤0.5%.

[0028] A preparation method of Al-Mn pipe material alloy for household air conditioner heat exchanger:

[0029] Prepare Al- 10Mn, Al- 25Zn, Al- 20Si, Al- 10Fe, Al- 50Cu, Al- 5Ti, Al- 2Cr, Al-10Zr master alloys, and preheat them in an oven at 80°C for 30 minutes;

[0030] Before smelting, put the mould, slag scraper and stirring rod into the resistance furnace, and preheat at 200°C. After preheating for 20 minutes, take out the above tools, and evenly brush a layer on the surface, and use H 3 PO 4 , Al(OH) 3 、Na 2 SiO 3 Dense coating mixed with deionized water to prevent sticking;

[0031] Put the aluminum ingot into the resistance furnace, heat it to 760°C and melt it into an aluminum melt, ...

Embodiment 2

[0037] A household air conditioner heat exchanger Al-Mn pipe alloy, the composition is by weight percentage: Mn 0.5%, Mg 0.2%, Zn 0.3%, Fe 0.3%, Si 0.4%, Cu 0.14%, Ti 0.15%, Cr 0.3 %, Zr 0.14%, the balance is Al and impurities, of which the impurity content is ≤0.5%.

[0038] A preparation method of Al-Mn pipe material alloy for household air conditioner heat exchanger:

[0039] Prepare Al- 10Mn, Al- 25Zn, Al- 20Si, Al- 10Fe, Al- 50Cu, Al- 5Ti, Al- 2Cr, Al-10Zr master alloys, and preheat them in an oven at 90°C for 50 minutes;

[0040] Before smelting, put the mould, slag-removing spoon and stirring rod into the resistance furnace, and preheat at 200°C. After preheating for 25 minutes, take out the above tools, and evenly brush a layer on the surface, and use H 3 PO 4 , Al(OH) 3 、Na 2 SiO 3 Dense coating mixed with deionized water to prevent sticking;

[0041] Put the aluminum ingot into the resistance furnace, heat it to 750°C to melt it into an aluminum melt, continue ...

Embodiment 3

[0047] A household air conditioner heat exchanger Al-Mn pipe alloy, the composition is by weight percentage: Mn 0.8%, Mg 0.4%, Zn 0.4%, Fe 0.35%, Si 0.3%, Cu 0.1%, Ti 0.25%, Cr 0.35 %, Zr 0.25%, the balance is Al and impurities, of which the impurity content is ≤0.5%.

[0048] A preparation method of an Al-Mn pipe alloy for a household air conditioner heat exchanger, comprising the following steps:

[0049] Prepare Al- 10Mn, Al- 25Zn, Al- 20Si, Al- 10Fe, Al- 50Cu, Al- 5Ti, Al- 2Cr, Al-10Zr master alloys, and preheat them in an oven at 100°C for 60 minutes;

[0050] Before smelting, put the mould, slag-removing spoon and stirring rod into the electric resistance furnace, preheat at 200°C, after preheating for 30 minutes, take out the above tools, and evenly brush a layer on the surface, and use H 3 PO 4 , Al(OH) 3 、Na 2 SiO 3 Dense coating mixed with deionized water to prevent sticking;

[0051] Put the aluminum ingot into the resistance furnace, heat it to 740°C and melt...

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Abstract

The invention belongs to the technical field of metal materials and metallurgy, and discloses an Al-Mn pipe alloy of a household air conditioner heat exchanger and a preparation method of the Al-Mn pipe alloy. The Al-Mn pipe alloy comprises, by weight: Mn: 0.5-1.0%, Mg: 0.1-0.5%, Zn: 0.1-0.4%, Fe: 0.1-0.4%, Si: 0.05-0.4%, Cu: 0.01-0.15%, Ti: 0.02-0.3%, Cr: 0.05-0.4%, Zr: 0.02-0.3%, and the balanceAl and impurities. The preparation method comprises the steps of melting an aluminum ingot into an aluminum melt; adding a magnesium ingot and an intermediate alloy into the aluminum melt; stirring to form an alloy melt; casting the alloy melt into a casting; and extruding, drawing and annealing the casting to obtain the Al-Mn pipe alloy of the household air conditioner heat exchanger. Accordingto the Al-Mn pipe alloy of the household air conditioner heat exchanger and the preparation method of the Al-Mn pipe alloy, the corrosion resistance, strength and toughness of the alloy is improved, and the product quality of the household air conditioner heat exchanger is favorably improved.

Description

technical field [0001] The invention belongs to the technical field of metal materials and metallurgy, and in particular relates to an alloy of an Al-Mn alloy pipe for a household air conditioner heat exchanger and a preparation method thereof. Background technique [0002] The air conditioner heat exchanger is a heat transfer device that exchanges heat through fluids of different temperatures. Due to copper's good thermal conductivity and corrosion resistance, copper heat exchangers have been widely used in air conditioners in the past. But copper is expensive, and my country is a copper-poor country, so it is necessary to replace copper heat exchangers with aluminum heat exchangers. [0003] Aluminum air conditioner heat exchanger refers to the use of aluminum tubes instead of copper tubes in the tube-fin heat exchanger as the transportation pipeline for refrigerant. Compared with traditional copper heat exchangers, aluminum heat exchangers have the advantages of light w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22F1/04
CPCC22C1/026C22C1/03C22C21/00C22F1/04
Inventor 王鹏谢贵娟连晓丽姜富园
Owner 河南誉金技术服务有限公司
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