CN102363845A - Antibacterial corrosion-resisting heat exchanging plate - Google Patents
Antibacterial corrosion-resisting heat exchanging plate Download PDFInfo
- Publication number
- CN102363845A CN102363845A CN201110174931XA CN201110174931A CN102363845A CN 102363845 A CN102363845 A CN 102363845A CN 201110174931X A CN201110174931X A CN 201110174931XA CN 201110174931 A CN201110174931 A CN 201110174931A CN 102363845 A CN102363845 A CN 102363845A
- Authority
- CN
- China
- Prior art keywords
- heat exchanging
- heat exchanger
- exchanging plate
- alloy
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to an antibacterial corrosion-resisting heat exchanging plate. The heat exchanging plate is characterized in that: the heat exchanging plate comprises materials of, by weight: 0.3 to 1.2% of Sn, 0.05 to 0.10% of P, 1.2 to 2.5% of Zn, 8.2 to 13.5% of Al, 0.5 to 1.2% of Mg, 0.3 to 1.6% of Cr, and balance of Cu and inevitable impurities. The copper alloy material provided by the invention has good heat hardiness. When a prepared copper alloy heat exchanging plate is heated to a temperature of 750 DEG C, an excellent strength property is maintained. Also, the copper alloy material has good antibacterial property. When the prepared copper alloy material is processed through a JISZ2801-200 test, a result shows that: antibacterial rates of the heat exchanging plate provided by the invention against escherichia coli and staphylococcus aureus are higher than 99.8%.
Description
Technical field
The present invention relates to a kind of heat exchanger plate, the present invention relates to a kind of heat exchanger plate specifically, it has antibiotic anti-corrosion effect.
Background technology
Being generally used for fin tube heat exchanger is the U font copper pipe (perhaps copper alloy tube) that bending machining is become the hair(-)pin shape, and the communicating pores of the radiator element that is made up of the aluminum or aluminum alloy plate inserts expanding tool in the copper pipe said copper pipe is carried out expander; Copper pipe and aluminium radiator fin are connected airtight; In addition, expander is carried out in the open end of copper pipe, become the crooked copper pipe of U font to insert this expander open end bending machining; Crooked copper pipe is brazed in the expander open end of U font copper pipe with solders such as phosphor-coppers; Thus, connect a plurality of U font copper pipes, make heat exchanger through crooked copper pipe.
For this reason, the copper pipe that is used for heat exchanger requires thermal conductivity, bendability and solderability good.Therefore, these characteristics are good, and the deoxidized copper with suitable intensity is widely used.
At present; Be used for the heat-transfer pipe of aforementioned fin tube heat exchanger because U font bending machining and expander will be carried out; Therefore the soft material through adopting the annealing material or the annealing material having been carried out the light processing of drawing etc.; It has sufficient deformability in the face of these processing, and can process with very little power.Under the situation of phosphorized copper system heat-transfer pipe,,, need the wall thickness of extra strong pipe therefore for the increase of the running pressure of corresponding refrigeration agent because tensile strength is little.In addition; When the assembling of heat exchanger; Brazing portion is heated the several seconds to tens of second in the temperature more than 800 ℃, therefore brazing portion and near compare thickization of crystal grain with other parts because the softening state that becomes the intensity reduction; Therefore reduce in order to remedy the intensity that causes because of brazing, need further thicken wall thickness.So, as passing pipe heat if use phosphorized copper, then the quality of heat exchanger increases, and price rises, and therefore a kind of tensile strength of just strong expectation is high, excellent in workability, the heat-transfer pipe with good thermal conductivity.For even the wall thickness attenuation of the phosphorous deoxidize copper tube that is used in fin tube heat exchanger still can tolerate practicality; Plastic working through the phosphorous deoxidize copper tube after the annealing being carried out drawing processing etc. gets final product to improve its tensile strength; But because plastic working causes ductility to reduce, thereby can not carry out bending machining.
In order to adapt to such requirement; As 0.2% yield-point and the excellent copper alloy tube of fatigue strength; For example proposing has a kind of heat exchanger to use the non junction copper alloy tube; It contains Co:0.02～0.2 quality %, P:0.01～0.05 quality %, C:1～20ppm, and surplus is made up of Cu and unavoidable impurities, and the oxygen of impurity is below the 50ppm.In addition; A kind of copper alloy tube for heat exchanger is also proposed; It has following composition: contain below Sn:0.1～1.0 quality %, P:0.005～0.1 quality %, the O:0.005 quality % and below the H:0.0002 quality %; Surplus is made up of Cu and unavoidable impurities, and average crystal grain diameter is below the 30 μ m.
Yet, though separate out intensity and tensile strength improved by what the phosphide of Co brought, not rising of withstand voltage strength at break in the ratio that intensity rises.In addition, the brazing heating when making owing to heat exchanger, said phosphide solid solution, the intensity of heat-transfer pipe reduces near brazing portion.Therefore, when it was used for heat-transfer pipe, existing not too can the attenuate wall thickness, thereby can not get the problem points of desired effects.
Summary of the invention
Above-mentioned purpose in view of the stainless heat exchanger that uses in the prior art exists the purpose of this invention is to provide a kind of heat exchanger plate, has sufficiently high corrosion resisting property, and has the antimicrobial effect.
To achieve these goals, the present invention has adopted following technical scheme:
A kind of antibiotic anti-corrosion heat exchanger plate is characterized in that it and is processed by the following material of forming; Sn:0.3-1.2 wt%, P:0.05-0.10 wt%, Zn:1.2-2.5 wt%, Al:8.2-13.5 wt%, Mg:0.5-1.2 wt%, Cr:0.3-1.6 wt%, surplus is that Cu and unavoidable impurities constitute.
The meaning and the qualification reason of the alloying constituent of Cu alloy material of the present invention are described below.
Sn：
In Cu alloy material of the present invention, Sn has tensile strength, unit elongation and the thermotolerance of raising, suppresses the effect of thickization of crystal grain; Also has certain sterilization antibacterial effect simultaneously.When the content of Sn surpasses 1.2 wt%, the conduction of Cu alloy material, thermal conductivity will significantly reduce; When the content of Sn was lower than 0.30 wt%, material can not obtain sufficient tensile strength and trickle crystal grain diameter after annealing and brazing heating.In the application's Cu alloy material, the content of Sn further is preferably: 0.5-0.9 wt%; Preferred its content is 0.6-0.9 wt%.
P：
Through in Cu alloy material, adding P, be used to prevent the oxidation of Sn, in alloy of the present invention,, then, hot pressing is prone to crack when going out if P content surpasses 0.10 wt%, and stress corrosion cracking susceptibility uprises.If P content is lower than 0.05 wt%, then because the deoxidation deficiency causes the oxygen amount to increase, with the oxidation that Sn inevitably takes place, as the bendability reduction of Cu alloy material.
Zn：
Through in Cu alloy material, adding Zn; Can increase and make and the flowability of weld period, can improve the workability of material, yet if the existence of the intermetallic phase that the further increase of the content of Zn will cause not expecting; Lure intergranular corrosion easily; And work as content at 1.2-2.5 wt%, when improving the material workability, the corrosion resisting property and the intensity of material there are not adverse influence.The preferred content of Zn is 1.5-2.2 wt%.
：
Through in Cu alloy material, adding Al, can the refinement alloying pellet, thus the erosion that produces to the grain boundary infiltration because of molten solder can be inhibited soldering the time.Preferably, the content range of Al is: 9.0-12.5 wt%.
Mg：
Through in Cu alloy material, adding Mg, the effect of the intensity that can be improved, the Al in alloy can work in coordination with the corrosion resisting property of improving material.If content surpasses 1.2 wt%, will significantly reduce brazing property, and addition is not remarkable to Cu alloy material intensity and corrosion proof raising during less than 0.5 wt%.The preferred content of Mg is 0.7-1.0 wt%.
Cr：
In copper alloy, add proper C r and help improving the resistance to elevated temperatures of alloy, and the Cr that adds helps forming the compound sull at alloy surface with other metal, and then improve corrosion resistance of alloy.The content range of Cr is in copper alloy of the present invention: 0.3-1.6 wt%.When the content of Cr the time greater than 1.6 wt%, with the hot workability that reduces copper alloy, because of rather than preferably.And when the content of Cr is lower than 0.3 wt%, not remarkable to the solidity to corrosion of alloy, stable on heating raising.Preferably, the content range of Cr is: 0.5-1.2wt%.
Ag
Ag is a kind of good sterilization antimicrobial element that has, and in copper alloy of the present invention, adds a spot of Ag and promptly can play good antibiotic and sterilizing effect with Cu one.Ag itself belongs to the ranks of precious metal, costs an arm and a leg, and based on the consideration on the price in the present invention, the content of Ag is no more than 0.02 wt%.In addition, when the content of Ag reached 0.02 wt%, its fungistatic effect basically reached capacity in Cu alloy of the present invention.Thereby in the present invention its content is defined as 0.01-0.02 wt%.
In addition; The invention also discloses the preparation method of above-mentioned heat exchanger plate; It is characterized in that, will under nitrogen protection atmosphere, be heated to 1150-1280 ℃ of insulation 50-200 min by the alloy raw material of Sn, P, Zn, Al, Mg, Cr, Ag and the Cu of above-mentioned weight percent proportioning; Add the BaCl that accounts for alloy raw material gross weight 0.2-0.8wt%
2, stir 25-75 min; Afterwards with alloy liquid at 1080-1250 ℃ of casting; Then in 650-820 ℃ of insulation 2-10 h processings that homogenize, cool off and obtain described Cu alloy material.Described Cu alloy material is through cold working and/or hot-work and/or casting, and prior aries such as for example forging, hot pressing, clod wash processing are processed into heat exchanger plate.
Heat exchanger plate 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 copper alloy; 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, the probability that spot corrosion takes place is also very little; And the intensity of material is compared with common copper alloy significant raising has also been arranged; In addition, Cu alloy material resistance toheat of the present invention is good, and the copper alloy heat exchanger plate of preparation is heated to 750 ℃ high temperature, and it still can keep excellent strength property; And have good antibacterial property, test shows that heat exchanger plate of the present invention reaches more than 99.8 % the antibiotic rate of intestinal bacteria, streptococcus aureus through JIS Z2801-200 with the Cu alloy material for preparing.
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, press the shown mass percent of table 1, prepare Cu alloy material of the present invention.Concrete preparation process is: will under nitrogen protection atmosphere, be heated to 1200 ℃ of insulation 180 min by the alloy raw material of Sn, P, Zn, Al, Mg, Cr, Ag and the Cu of above-mentioned weight percent proportioning; Add the BaCl that accounts for alloy raw material gross weight 0.5wt%
2, stir 45 min; Afterwards with alloy liquid at 1150 ℃ of casting; Then in 720 ℃ of insulation 5 h processings that homogenize, cool off and obtain described Cu alloy material; Be processed into heat exchanger plate again.
Strength of materials test
In order to measure tensile strength, the materials processed that will pass through at normal temperatures after the cold working becomes standardized component, carries out the standard tensile test, the tensile strength of test material.Person between the tensile strength 320 MPa-450 MPa is evaluated as very, is lower than 320 MPa persons and is evaluated as badly, it is excellent to surpass being evaluated as of 450 MPa.
The chemical ingredients of table 1 mother metal (surplus is Cu and unavoidable impurities)
| Numbering | Sn | P | Zn | Al | Mg | Cr | Ag |
| 1 | 0.3 | 0.50 | 1.2 | 8.2 | 0.5 | 0.3 | 0.01 |
| 2 | 0.5 | 0.05 | 1.35 | 8.8 | 1.6 | 0.5 | 0.01 |
| 3 | 0.6 | 0.06 | 1.5 | 9.4 | 0.7 | 0.7 | 0.01 |
| 4 | 0.7 | 0.06 | 1.65 | 10.0 | 0.8 | 0.9 | 0.01 |
| 5 | 0.8 | 0.07 | 1.80 | 10.8 | 0.9 | 1.1 | 0.02 |
| 6 | 1.0 | 0.07 | 1.95 | 11.6 | 1.0 | 1.3 | 0.02 |
| 7 | 1.1 | 0.09 | 2.2 | 12.4 | 1.1 | 1.5 | 0.02 |
| 8 | 1.2 | 0.10 | 2.5 | 13.5 | 1.2 | 1.6 | 0.02 |
Corrosion-resistant and the antibacterial test of material
Size with 50 * 50 mm cuts out sample respectively, carries out the test of salt-fog test (SWAAT test) and JIS Z2801-2000 anti-microbial property.The corrosion test time set is 1000 hours, material surface do not have the degree of depth surpass 0.1 mm corrosion pit, be evaluated as very, it is poor to have the sample of the corrosion pit that surpasses 0.1 mm to be evaluated as corrodibility, no corrosion pit, be evaluated as excellent.
The test strain of antibacterial test is intestinal bacteria and streptococcus aureus.Detection method is:
(1) sample is cut into the big or small size of 50.0 * 50.0 mm, sterilization (in triplicate).
(2) on sample, drip some milliliters of bacterium liquid, make colony count maintain 10
5
(3) plastics film is covered specimen surface, put into aseptic plate then, in 36 ± 1 ℃ of constant incubators, cultivate after 24 hours, viable bacteria is counted.
(4) with the ferritic stainless steel of the not argentiferous same model of comparative example 1 as control sample, repeat aforesaid operations.
Antibiotic rate adopts by antibiotic rate=[(A-B)/A] * 100% and calculates, in the formula: the average viable count of control sample after A-24 hour; Antibiotic sample average viable count after B-24 hour.
Table 2: sample tensile strength, solidity to corrosion and antibacterial effect
| Numbering | Tensile strength | SWAAT test 1000 hours | Antimicrobial efficiency |
| 1 | Very | Very | >99.8 % |
| 2 | Very | Very | >99.8 % |
| 3 | Excellent | Excellent | >99.8 % |
| 4 | Excellent | Excellent | >99.8 % |
| 5 | Excellent | Excellent | >99.8 % |
| 6 | Excellent | Very | >99.8 % |
| 7 | Excellent | Very | >99.8 % |
| 8 | Very | Very | >99.8 % |
Claims (6)
1. an antibiotic anti-corrosion heat exchanger plate is characterized in that it and is processed by the following material of forming; Sn:0.3-1.2 wt%, P:0.05-0.10 wt%, Zn:1.2-2.5 wt%, Al:8.2-13.5 wt%, Mg:0.5-1.2 wt%, Cr:0.3-1.6 wt%, surplus is that Cu and unavoidable impurities constitute.
2. the described heat exchanger plate of claim 1 is characterized in that the content of Sn is: 0.6-0.9 wt%.
3. the described heat exchanger plate of claim 1 is characterized in that the content of Zn is: 1.5-2.2 wt%.
4. the described heat exchanger plate of claim 1 is characterized in that the content of Al is: 9.0-12.5 wt%.
5. the described heat exchanger plate of claim 1 is characterized in that the content of Mg is: 0.7-1.0 wt%.
6. the described heat exchanger plate of claim 1 is characterized in that the content of Cr is: 0.5-1.2 wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110174931XA CN102363845A (en) | 2011-06-27 | 2011-06-27 | Antibacterial corrosion-resisting heat exchanging plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110174931XA CN102363845A (en) | 2011-06-27 | 2011-06-27 | Antibacterial corrosion-resisting heat exchanging plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102363845A true CN102363845A (en) | 2012-02-29 |
Family
ID=45690438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110174931XA Pending CN102363845A (en) | 2011-06-27 | 2011-06-27 | Antibacterial corrosion-resisting heat exchanging plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102363845A (en) |
-
2011
- 2011-06-27 CN CN201110174931XA patent/CN102363845A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11028464B2 (en) | Lead-free easy-to-cut corrosion-resistant brass alloy with good thermoforming performance | |
| CN103154284B (en) | Pressure-resistant and corrosion-resistant copper alloy, brazed structure, and method for producing brazed structure | |
| CN103540808B (en) | A kind of automobile radiators complete processing of 3003 aluminum alloy materials | |
| US8580191B2 (en) | Brass alloys having superior stress corrosion resistance and manufacturing method thereof | |
| CN103866157A (en) | High-strength corrosion-resistant micro-alloying copper pipe and manufacturing method thereof | |
| CN101701304B (en) | Manufacturing method of low-cost corrosion-resistant lead-free easy-cutting brass | |
| CN102330005A (en) | Aluminium alloy material for radiator fin | |
| CN100366772C (en) | Seamless copper alloy pipe with excellent anti-corrosion performance for heat exchanger and preparation method thereof | |
| CN108699637A (en) | Aluminium alloy brazing piece and its manufacturing method and the manufacturing method for using the automobile heat exchanger for working as the soldering lug | |
| CN101161836A (en) | Leadless easy-cutting magnesium brass alloy and method for preparing same | |
| CN102345030A (en) | Antibacterial and corrosion resistant heat exchanger copper pipe | |
| CN108857138A (en) | A kind of dissimilar metal connection low silver-colored cadmium-free silver-base solder and preparation method thereof | |
| CN102367532A (en) | Antibacterial and corrosion resistant aluminum alloy flat cooling tube of heat exchanger | |
| CN102363845A (en) | Antibacterial corrosion-resisting heat exchanging plate | |
| CN102329996A (en) | Antibiotic corrosion resistant aluminum alloy heat exchange plate | |
| CN102363846A (en) | Antibacterial and corrosion-resistant heat exchanger cooling flat tube | |
| CN102329987A (en) | Antibacterial and anticorrosive radiator aluminum alloy fin | |
| CN102346001A (en) | Antibacterial corrosion resistant radiator cooling fin | |
| CN102330001A (en) | Antibiosis anti-corrosion aluminium alloy radiator cooling fin | |
| CN111004941B (en) | Corrosion-resistant copper alloy material for plate heat exchanger and preparation method thereof | |
| CN103540807A (en) | 3003 aluminum alloy material for automobile water tank pipe and processing process for 3003 aluminum alloy material | |
| CN102363847A (en) | Copper alloy material of radiating fin of radiator | |
| CN102330000A (en) | Antibiotic corrosion resistant heat exchanger aluminum pipe | |
| CN102345029A (en) | Copper alloy material for radiator fins | |
| CN102345032A (en) | Copper alloy material of heat exchanger copper pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120229 |