CN102329986A - Aluminum alloy material for heat exchanger plate - Google Patents
Aluminum alloy material for heat exchanger plate Download PDFInfo
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- CN102329986A CN102329986A CN201110171130A CN201110171130A CN102329986A CN 102329986 A CN102329986 A CN 102329986A CN 201110171130 A CN201110171130 A CN 201110171130A CN 201110171130 A CN201110171130 A CN 201110171130A CN 102329986 A CN102329986 A CN 102329986A
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Abstract
The invention relates to an aluminum alloy material for a heat exchanger plate, which is characterized by comprising the following ingredients with the following contents: 0.3 to 0.85 weight percent of B, 0.5 to 1.8 weight percent of Mn, 0.5 to 1.6 weight percent of Ti, 0.20 to 0.60 weight percent of Cu and the balance Al and inevitable impurities. The aluminum alloy material disclosed by the invention has the advantages of higher strength characteristic, good solderability, excellent corrosion resistance and good processability and is particularly suitable for being used as the heat exchanger plate.
Description
Technical field
The present invention relates to a kind of aluminum alloy materials, the present invention relates to a kind of aluminum alloy materials that is suitable for heat exchanger plate specifically, it has excellent erosion resistance, and its processability is good.
Background technology
In interchanger such as vaporizer, condensing surface, use the good duraluminum of light weight and thermal conductivity always.Usually, the manufacturing of these interchanger is to carry out according to following method: for example through with sheet bending, or in addition range upon range of by the sheet material of press working moulding, thereby form the cooling flat tube as working fluid.
With regard to erosion resistance, because from outside surface and inner corrosion, when producing break-through prematurely in the refrigerant path pipe; Leakage of refrigerant can't play the function as interchanger, therefore; Implement anti-corrosive treatment at the outside surface of refrigerant path pipe always, prolong the life-span of interchanger thus.In the past, to adopt Al-Ti be alloy was coated on the outside surface of sheet material as sacrificial anode material, and with this plate forming for equalling the method that tubulose uses partially; Or the method for extruding perforated tube as the refrigerant path pipe use.Yet the structure of most interchanger is the structures that engage fin at the outside surface of refrigerant path pipe, because there is not solder in the outside surface of refrigerant path pipe in the method, therefore, must use the fin material that has coated solder.At this moment, owing to receive the influence of the solder that residues in fin surface, self corrosion resistance nature of fin material reduces, and the manufacturing cost that coats the fin material in addition is higher than naked fin, therefore causes the rising of interchanger manufacturing cost.
In the fin that the outside surface of refrigerant path pipe engages, use under the situation of naked material, can improve self erosion resistance of fin, and through using the high conduction material; Can also improve the performance of interchanger; Compare with coating the fin material, also can reduce cost, but need give solder this moment at the outside surface of refrigerant path pipe; Therefore; Will be the pulverous solder of surface-coated of alloy at above-mentioned Al-Ti, perhaps, will use outside surface to be coated with at Al-B be the sheet material that has added the material of Ti in the solder alloy.Under the former situation,, therefore cause the increase of interchanger manufacturing cost because the cost of powder brazing alloy is high; In the latter case, owing to flowing of the molten solder that contains Ti in the soldering, therefore; Do not reach as the needed Ti amount of sacrificial anode material in the residual Ti amount of refrigerant passage tube outer surface after causing soldering, cause to obtain enough anticorrosion abilities of refrigerant path pipe, perhaps; Flow to the junction surface owing to contain the molten solder of Ti, cause the preferential corrosion at junction surface.
In the prior art, application number is 02828286.8 patent report relates to a kind of brazed heat exchanger superpower, durable, that erosion resistance improves and uses aluminium fin.This alloy is based on the regenerated material.This alloy demonstrates the corrosive nature of raising, excellent anti-performance and the back soldering strength of hanging down of high temperature for pitting corrosion.Through optimizing the combination of materials of radiator element, pipe, end plate and side plate, can be manufactured on the interchanger that has enough corrosive natures among the SWAAT.
Application number is 02806584.0 patent report, and a kind of corrosion resistant aluminum alloy has iron, manganese, chromium and the titanium of manipulated variable, and the zinc that contains copper, silicon, nickel and be no more than impurity level.Adjust the chemical constitution of said alloy,, thereby reduce intergranular corrosion so that the electropotential of grain boundary and alloy substrate be complementary.Said alloy is particularly suitable for adopting extruding and soldering tech to make the tubing in the heat exchanger.
Summary of the invention
The aluminum alloy materials that the purpose of this invention is to provide a kind of heat exchanger plate; Still can not satisfy the requirement of the abominable working conditions of heat exchanger plate to aluminum alloy heat exchanger of the prior art at intensity, corrosion resistance nature, processability, a kind of higher strength characteristics, solderability, corrosion resistance excellent is provided and have the aluminum alloy materials of the cooling flat tube of good processability.
To achieve these goals, the present invention has adopted following technical scheme:
A kind of aluminum alloy materials of heat exchanger plate is characterized in that it has following component and content: B:0.3-0.85 wt%, Mn:0.5-1.8 wt%, and Ti:0.5-1.6 wt%, Cu:0.20-0.60 wt%, surplus is that Al and unavoidable impurities constitute.
The meaning and the qualification reason of the alloying constituent of aluminum alloy materials of the present invention are described below.
B：
Through in duraluminum, adding can the be improved effect of intensity of B.Preferred content is B:0.3-0.85 wt%; When if the content of B is lower than 0.3wt%, the effect that improves intensity is not remarkable, and the adding of B is beneficial to the wettability of improving alloy again; Help improving the processing characteristics of duraluminum, particularly significantly improved the cold-forming property of alloy.The content of B surpasses the upper limit, and then the solidity to corrosion to duraluminum produces adverse influence.Preferably, the content range of B is: 0.45-0.75 wt%.
：
Through in duraluminum, adding Mn, can the refinement aluminum alloy granule, improve the intensity of alloy and don't reduce the solidity to corrosion of alloy.When the content of Mn was lower than 0.5 wt%, its raising to intensity of aluminum alloy was not remarkable; And when the content of Mn was higher than 1.8wt%, its solubleness in alloy reached capacity, and continued to increase the content of Mn, will cause in hot worked process, reducing the processing characteristics of extruding of alloy.Thereby, in the present invention its content is limited in the scope of 0.5wt%-1.5wt%.Preferably, the content range of Mn is: 0.8-1.5 wt%.Preferred its content range is 0.9-1.2 wt%.
Ti：
Through in duraluminum, adding Ti, can increase the flowability of manufacturing and weld period, can improve the workability of material, and in the framework of the present definition, when improving the material workability, the corrosion resisting property of material not had the influence of significant adverse.But when the content of Ti is higher than 1.6 wt%, will form a large amount of intermetallic compounds, cause selective corrosion easily.Preferably, the content of Ti is 0.8-1.3 wt%.
Cu：
Through in duraluminum, adding Cu, the effect of the intensity that can be improved, and in alloy of the present invention, add the Cu of an amount of content, and can also improve the spontaneous potential of alloy, more or less can improve the solidity to corrosion of alloy.The preferred content of Cu is 0.20-0.60wt%, if but the content of Cu surpasses 0.60 wt%, the compound that contains Cu will optionally be deposited on crystal boundary around, cause the solidity to corrosion of alloy to reduce and will reduce the extrusion performance of alloy.The content range of preferred Cu is 0.20-0.45 wt%.
In addition; The invention also discloses the preparation method of the aluminum alloy materials of above-mentioned heat exchanger plate; It is characterized in that, will under nitrogen protection atmosphere, be heated to 620-720 ℃ of insulation 40-90 min by the alloy raw material of B, Mn, Ti, Cu and the Al of above-mentioned weight percent proportioning; Add the BaCl that accounts for alloy raw material gross weight 0.2-0.6 wt%
2, stir 30-50 min; Afterwards with alloy liquid casting; Pouring temperature is 550-650 ℃; Then in 400-480 ℃ of insulation 2-8 h processings that homogenize, and cool off the aluminum alloy materials that obtains heat exchanger plate.
Aluminum alloy materials of the present invention behind homogenizing annealing, is observed its metallographic structure, and crystal grain is tiny and evenly beneficial to the solidity to corrosion that improves duraluminum; And do not find to exist in a large number the heterogeneous phase of galvanic corrosion in its tissue, alleviated the tendency that intergranular corrosion takes place greatly; Adopt the SWAAT experiment that the corrosion behavior of alloy material is tested, show that duraluminum solidity to corrosion of the present invention is significantly increased; And the intensity of material and common aluminium alloys also had significant raising, and the aluminum alloy materials that the present invention describes is suitable for being processed into heat exchanger plate.
Embodiment
Following the present invention will combine concrete embodiment that the present invention is done further explanation and explanation.
Press the shown mass percent of table 1, prepare aluminum alloy materials of the present invention.Concrete preparation process is: will under nitrogen protection atmosphere, be heated to 690 ℃ of insulation 70 min by the alloy raw material of B, Mn, Ti, Cu and the Al of the shown per-cent proportioning of table 1; Add the BaCl that accounts for alloy raw material gross weight 0.5 wt%
2, stir 50 min; Afterwards with alloy liquid casting; Pouring temperature is 630 ℃; Then in 450 ℃ of insulation 3 h processings that homogenize, and cool off the aluminum alloy materials that obtains heat exchanger plate.
The chemical ingredients of table 1 mother metal duraluminum
| Numbering | B | Mn | Ti | Cu | Al |
| 1 | 0.3 | 0.5 | 0.5 | 0.2 | Surplus |
| 2 | 0.35 | 0.7 | 0.7 | 0.25 | Surplus |
| 3 | 0.5 | 0.9 | 0.9 | 0.3 | Surplus |
| 4 | 0.55 | 1.1 | 1.0 | 0.35 | Surplus |
| 5 | 0.65 | 1.3 | 1.2 | 0.4 | Surplus |
| 6 | 0.70 | 1.5 | 1.35 | 0.47 | Surplus |
| 7 | 0.75 | 1.7 | 1.50 | 0.55 | Surplus |
| 8 | 0.85 | 1.8 | 1.60 | 0.6 | Surplus |
The aluminum alloy materials that obtains is carried out following Performance Detection
Strength of materials test
In order to measure tensile strength, carry out the standard tensile test at normal temperatures, the tensile strength of test material.The above person of tensile strength 150MPa is evaluated as well (zero), will be lower than 150MPa person and be evaluated as bad (*).
The material corrosion resistance test
Size with 50 * 50 mm cuts out sample respectively, carries out salt-fog test.The corrosion test time set is 800 hours, material surface do not have the degree of depth surpass 0.1 mm corrosion pit, be evaluated as good (zero), will have the sample of the corrosion pit that surpasses 0.1 mm to be evaluated as corrodibility poor (*).Test result is presented in the table 2.
Table 2: sample tensile strength and salt-fog test result
| Specimen coding | Tensile strength | SWAAT test 800 hours |
| 1 | ○ | ○ |
| 2 | ○ | ○ |
| 3 | ○ | ○ |
| 4 | ○ | ○ |
| 5 | ○ | ○ |
| 6 | ○ | ○ |
| 7 | ○ | ○ |
| 8 | ○ | ○ |
Claims (8)
1. the aluminum alloy materials of a heat exchanger plate is characterized in that it has following component and content: B:0.3-0.85 wt%, Mn:0.5-1.8 wt%, and Ti:0.5-1.6 wt%, Cu:0.20-0.60 wt%, surplus is that Al and unavoidable impurities constitute.
2. the described aluminum alloy materials of claim 1 is characterized in that the content range of described B is: 0.45-0.75 wt%.
3. the described aluminum alloy materials of claim 1 is characterized in that the content range of described Mn is: 0.8-1.5 wt%.
4. the described aluminum alloy materials of claim 1, the content that it is characterized in that described Mn is 0.9-1.2 wt%.
5. the described aluminum alloy materials of claim 3, the content that it is characterized in that described Ti is 0.8-1.3 wt%.
6. the described aluminum alloy materials of claim 1, the content range that it is characterized in that described Cu is 0.20-0.45 wt%.
7. the preparation method of each described aluminum alloy materials of claim 1-6 is characterized in that the alloy raw material by B, Mn, Ti, Cu and the Al of aluminum alloy materials proportioning is heated to 620-720 ℃ of insulation 40-90 min under nitrogen protection atmosphere; Add the BaCl that accounts for alloy raw material gross weight 0.2-0.6 wt%
2, stir 30-50 min; Afterwards with alloy liquid casting; Pouring temperature is 550-650 ℃; Then in 400-480 ℃ of insulation 2-8 h processings that homogenize, and cool off the aluminum alloy materials that obtains heat exchanger plate.
8. a heat exchanger plate is characterized in that being processed by each described aluminum alloy materials of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110171130A CN102329986A (en) | 2011-06-23 | 2011-06-23 | Aluminum alloy material for heat exchanger plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110171130A CN102329986A (en) | 2011-06-23 | 2011-06-23 | Aluminum alloy material for heat exchanger plate |
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| CN102329986A true CN102329986A (en) | 2012-01-25 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000303133A (en) * | 1999-04-15 | 2000-10-31 | Toyota Central Res & Dev Lab Inc | Aluminum alloy for pressure casting, excellent in fatigue strength |
| CN1752248A (en) * | 2005-09-29 | 2006-03-29 | 郑州大学 | Deformed Al-Mn series alloy and preparing process thereof |
| CN101072673A (en) * | 2004-10-19 | 2007-11-14 | 阿勒里斯铝业科布伦茨有限公司 | Method of producing an aluminium alloy brazing sheet and light brazed heat exchanger assemblies |
-
2011
- 2011-06-23 CN CN201110171130A patent/CN102329986A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000303133A (en) * | 1999-04-15 | 2000-10-31 | Toyota Central Res & Dev Lab Inc | Aluminum alloy for pressure casting, excellent in fatigue strength |
| CN101072673A (en) * | 2004-10-19 | 2007-11-14 | 阿勒里斯铝业科布伦茨有限公司 | Method of producing an aluminium alloy brazing sheet and light brazed heat exchanger assemblies |
| CN1752248A (en) * | 2005-09-29 | 2006-03-29 | 郑州大学 | Deformed Al-Mn series alloy and preparing process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 罗启全: "《铝合金熔炼与铸造》", 30 September 2002, article "《铝合金熔炼与铸造》" * |
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Application publication date: 20120125 |