CN109402447A - One Albatra metal, copper pipe and preparation method thereof - Google Patents
One Albatra metal, copper pipe and preparation method thereof Download PDFInfo
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- CN109402447A CN109402447A CN201811543899.6A CN201811543899A CN109402447A CN 109402447 A CN109402447 A CN 109402447A CN 201811543899 A CN201811543899 A CN 201811543899A CN 109402447 A CN109402447 A CN 109402447A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/004—Copper alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The present invention provides an Albatra metals, copper pipe and preparation method thereof, the copper alloy by the gross mass of the copper alloy be very in terms of, include the following components'mass percentage: boron 0.001~0.01%, tin 0.3~0.4% and rare earth element 0.0036~0.01%, surplus are copper and impurity.The present invention can effectively refine the grain structure of copper alloy by addition boron, tin and rare earth element in Copper substrate, obtained copper alloy and copper pipe, tensile strength, compression strength and good corrosion resistance and heat resistance with higher.
Description
Technical field
The present invention relates to copper pipe processing technical fields, are specifically related to an Albatra metal, copper pipe and preparation method thereof.
Background technique
Copper pipe lighter in weight, thermal conductivity is good, and low temperature intensity is high, be usually used in water supply pipe, heat exchange equipment (such as evaporator and
Condenser etc.) and oxygen generating plant in assemble cryogenic pipe etc..
Traditional copper pipe generally mostly uses phosphorized copper to be prepared, and phosphorized copper has good heat-conductive characteristic, and
Plasticity is good, easy processing and easily welding；And the generally existing tensile strength of copper pipe and compression strength being prepared using phosphorized copper
Lower problem.
Summary of the invention
In view of this, an Albatra metal provided by the invention, copper pipe and preparation method thereof, preferably overcome above-mentioned existing
Technology there are the problem of and defect by adding boron, tin and rare earth element in Copper substrate can effectively refine the crystalline substance of copper alloy
Grain tissue, obtained copper alloy and copper pipe, tensile strength, compression strength and good corrosion resistance and heat resistance with higher
Energy.
One Albatra metal, by the gross mass of the copper alloy be very in terms of, include the following components'mass percentage: boron
0.001~0.01%, tin 0.3~0.4% and rare earth element 0.0036~0.01%, surplus are copper and impurity.
Further, the impurity includes sulphur and phosphorus, and the total content of the impurity is less than 0.15%.
Further, the rare earth element includes lanthanum and cerium, and the mass ratio of the lanthanum and cerium is 1:(0.4~0.5).
The present invention also provides a kind of preparation methods of copper pipe, comprising:
Copper substrate, Cu-B alloy, metallic tin and rare earth alloy are mixed, copper liquid is obtained through smelting furnace melting, makes the copper liquid
The mass fraction of middle boron is 0.001~0.01%, and the mass fraction of tin is 0.3~0.4% and the mass fraction of rare earth element is
0.0036~0.01%, surplus is copper and impurity；
It is passed through inert gas into the smelting furnace, is in then solid by the cooling condensation of crystallizer, and through continuous traction shape
At pipe；
The pipe is subjected to three-roll planetary rolling.
Further, the impurity includes sulphur and phosphorus, and the total content of the impurity is less than 0.15%.
Further, the Copper substrate is phosphorized copper；The rare earth element includes lanthanum and cerium, the quality of the lanthanum and cerium
Than for 1:(0.4~0.5).
Further, the smelting temperature is 1180~1200 DEG C；Before being passed through inert gas into the smelting furnace, in institute
It states copper liquid surface and spreads one layer of covering.
Further, the crystallizer is cooling using recirculated cooling water spacer, and the inflow temperature of cooling water is 25~28 DEG C,
Leaving water temperature is not higher than 60 DEG C；The traction temperature is 1140~1160 DEG C, and the hauling speed is 420~450mm/min.
Further, before the pipe is carried out three-roll planetary rolling, by the pipe first in the induction of argon gas protection
340~350 DEG C are preheated in heating furnace；The rolling temperature is 720~750 DEG C, and the mill speed is 20~25m/min.
The present invention also provides a kind of copper pipe, the copper pipe is prepared by the preparation method of above-mentioned copper pipe.
Compared with prior art, the beneficial effect an of Albatra metal provided by the invention, copper pipe and preparation method thereof is:
(1) present invention can effectively refine the crystal grain group of copper alloy by adding boron, tin and rare earth element in Copper substrate
It knits, obtained copper alloy and copper pipe, tensile strength, compression strength and good corrosion resistance and heat resistance with higher.
(2) the preparation method process of copper pipe of the invention is simple, and cost is relatively low.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, makees detailed
It is described as follows.
Specific embodiment
To facilitate the understanding of the present invention, it elaborates below with reference to the mode of embodiment to technical solution of the present invention,
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention.
But the invention can be embodied in many other ways as described herein, those skilled in the art can be with
Similar improvement is done without violating the connotation of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
Unless otherwise defined, all technologies used herein and scientific term have and the common skill of fields of the present invention
The normally understood identical meaning of art personnel.When there is a conflict, the definition in this specification shall prevail.
Term as used herein:
Term "comprising" used herein, " comprising ", " having ", " containing " or its any other deformation, it is intended that covering
Non-exclusionism includes.For example, composition, step, method, product or device comprising listed elements are not necessarily limited to those and want
Element, but may include not expressly listed other elements or such composition, step, method, product or device it is intrinsic
Element.
Dosage, temperature or other values or parameter are excellent with range, preferred scope or a series of upper limit preferred values and lower limit
When the Range Representation that choosing value limits, this should be understood as specifically disclosing by any range limit or preferred value and any range
Any pairing of lower limit or preferred value is formed by all ranges, regardless of whether the range separately discloses.For example, when open
When range " 1~5 ", described range should be interpreted as including range " 1~4 ", " 1~3 ", " 1~2 ", " 1~2 and 4~
5 ", " 1~3 and 5 " etc..When numberical range is described herein, unless otherwise stated, otherwise the range is intended to include its end
Value and all integers and score in the range.
"and/or" is used to indicate that one of illustrated situation or both may to occur, for example, A and/or B includes (A
And B) and (A or B).
An Albatra metal of the invention, by the gross mass of the copper alloy be very in terms of, including following mass percent
Component:
Boron 0.001~0.01% such as 0.001%, 0.003%, 0.005%, 0.008% or 0.01%；
Tin 0.3~0.4% such as 0.3%, 0.32%, 0.35%, 0.38% or 0.4%；
Rare earth element 0.0036~0.01% such as 0.0036%, 0.0045%, 0.0050%, 0.0065% or 0.008%
Or 0.01% etc.；
Surplus is copper and impurity.
Preferably, the impurity includes sulphur and phosphorus, and the total content of the impurity is less than 0.15%.
Preferably, the rare earth element includes lanthanum and cerium, and the mass ratio of the lanthanum and cerium is 1:(0.4~0.5) such as 1:
0.4,1:0.45 or 1:0.5 etc..
The present invention also provides a kind of preparation methods of copper pipe, comprising:
(1) Copper substrate, Cu-B alloy, metallic tin and rare earth alloy are mixed, obtains copper liquid through smelting furnace melting, makes the copper
The mass fraction of boron is 0.001~0.01% in liquid, and the mass fraction of tin is the mass fraction of 0.3~0.4% and rare earth element
It is 0.0036~0.01%, surplus is copper and impurity.
Preferably, the Copper substrate is phosphorized copper；The impurity includes sulphur and phosphorus, and the total content of the impurity is less than
0.15%.
Preferably, the rare earth element includes lanthanum and cerium, and the mass ratio of the lanthanum and cerium is 1:(0.4~0.5) such as 1:
0.4,1:0.45 or 1:0.5 etc..
Preferably, the smelting temperature is 1180~1200 DEG C such as 1280 DEG C, 1300 DEG C, 1500 DEG C, 1800 DEG C or 2000
DEG C etc..
Preferably, after above-mentioned smelting furnace melting, further including spreading one layer of covering on copper liquid surface, such as charcoal slag or
Charcoal slag and the compound of graphite flake etc., the purpose is to prevent copper liquid to be oxidized.The thickness of covering charcoal slag is preferably in copper liquid
200~250mm such as 200mm, 230mm or 250mm etc..
(2) it is passed through inert gas in Xiang Suoshu smelting furnace, is in then solid by the cooling condensation of crystallizer, and continuously drawn
Form pipe.
It is understood that the above-mentioned inert gas that is passed through into smelting furnace is in order to drive the air in smelting furnace away, in indifferent gas
Under the protection of atmosphere, avoids copper liquid in subsequent cooling condensation and distraction procedure from being oxidized, influence the performance of final finished.It is above-mentioned lazy
Property gas can be for argon gas or helium etc..
Preferably, the crystallizer is cooling using recirculated cooling water spacer, and the inflow temperature of cooling water is 25~28 DEG C, out
Coolant-temperature gage is not higher than 60 DEG C.If copper liquid height (distance on copper liquid surface to copper liquid bottom) is 360~380mm, crystallizer is inserted
The depth for entering melt is 20~22mm.
Preferably, the traction temperature be 1140~1160 DEG C, the hauling speed be 420~450mm/min such as
420mm/min, 430mm/min, 440mm/min or 450mm/min etc..
(3) pipe is subjected to three-roll planetary rolling.
Preferably, before the pipe is carried out three-roll planetary rolling, after the pipe is first passed through sawing and milling face, so
340~350 DEG C such as 340 DEG C, 345 DEG C or 350 DEG C are preheated in the induction heater of argon gas protection afterwards, are convenient for subsequent progress
Rolling.
The rolling process use three-roll planetary rolling, the rolling temperature be 720~750 DEG C as 720 DEG C, 730 DEG C,
740 DEG C or 750 DEG C, the mill speed is 20~25m/min such as 20m/min, 23m/min or 25m/min etc..
By after three-roll planetary rolling, further include will rolling shell it is cooling after by plate drawing machine cold-drawn at
Type, the copper pipe made do not have the bad defect such as stomata, crackle, ear, burr；It is protected again in annealing furnace nitrogen or argon atmosphere
Under made annealing treatment, to eliminate stress.Wherein, annealing temperature is preferably 600~700 DEG C, annealing time 30-60min.
It should be noted that on the one hand boron can be used as a kind of grain refiner, the crystal grain of copper alloy can be effectively refined
Tissue keeps the tendentiousness that crackle is formed when subsequent solidification small, so that yield rate improves；On the other hand, the addition of boron element can mention
Rise the tensile strength of copper pipe.Boron, can be effective by the way that the copper pipe being prepared in phosphorized copper is added in the form of Cu-B alloy
It reduces copper pipe substance and improves its compression strength, and be added in the form of single metal boron and be then not enough to reduce copper pipe substance,
Improve its voltage endurance capability.
The addition of tin element is not only changed the ingredient of copper pipe, and it is brilliant more mainly to cause copper pipe tissue local
The distortion of body dot matrix.There are difference, localised crystal's dot matrix is distorted and causes the size of solute tin atom and matrix copper atom
Strain field will generate with the variations of dislocation interactions, finally play the deformation drag for increasing crystal, generate solution strengthening
Effect.Tin element is also copper pipe；The key factor that tensile strength improves, while yield strength is slightly promoted, and relative to tradition
Phosphorized copper preparation copper pipe, the compression strength of the copper pipe of the identical wall thickness of same outer diameter is obviously improved, if the two guarantee it is anti-
In the identical situation of Compressive Strength, the addition of tin element makes the wall thickness reduction of copper pipe, achievees the purpose that save material, and not to copper pipe
Other performance have an impact；And Theil indices between 0.3%~0.4% when tensile strength and compression strength it is optimal.
The addition of rare earth element is to play invigoration effect to alloy by purification matrix, to play raising alloy
The purpose of comprehensive mechanical performance, while rare earth element also plays the role of refining crystal grain.Further, research finds addition
0.0036%~0.01% lanthanum and the mixed rare earth alloy of cerium, hence it is evident that the microscopic structure for having refined copper pipe effectively increases copper
The tensile strength of pipe, and yield strength is reduced, copper pipe plastic degeneration in subsequent process is improved.
The present invention can effectively refine the grain structure of copper alloy by addition boron, tin and rare earth element in Copper substrate,
Obtained copper alloy and copper pipe, tensile strength, compression strength and good corrosion resistance and heat resistance with higher；Separately
Outside, the wall thickness reduction of copper pipe can also be made in the case where guaranteeing compression strength, to reduce the weight of copper pipe.
It is understood that too high or too low can all reduce of the additional amount of above-mentioned boron, tin and rare earth element consolidates copper pipe
Molten reinforcing and thinning effect, to reduce the comprehensive mechanical performance of final copper pipe finished product.
To facilitate the understanding of the present invention, below with reference to embodiment to further illustrate the technical scheme of the present invention.Applicant
Statement, the present invention illustrate detailed process equipment and process flow of the invention by following embodiments, but the present invention not office
It is limited to following detailed process equipments and process flow, that is, does not mean that the present invention should rely on following detailed process equipments and technique stream
Cheng Caineng is implemented.It should be clear to those skilled in the art, any improvement in the present invention, to each original of product of the present invention
The equivalence replacement of material and addition, the selection of concrete mode of auxiliary element etc. all fall within protection scope of the present invention and open model
Within enclosing.
Embodiment 1
A kind of preparation method of copper pipe, comprising the following steps:
(1) phosphorized copper, Cu-B alloy, metallic tin and rare earth alloy are mixed, obtains copper liquid through smelting furnace melting, makes copper liquid
The mass fraction of middle boron is 0.001%, and the mass fraction of tin is 0.4% and the mass fraction of rare earth element is 0.0036%, remaining
Amount is copper and impurity, and less than 0.15%, rare earth alloy is made of content of impurities the lanthanum that mass ratio is 1:0.4 and cerium.
(2) the charcoal slag that a layer thickness is 250mm is spread on copper liquid surface, is passed through inert gas in Xiang Suoshu smelting furnace, then
The crystallizer of conticaster is protruded into copper liquid, it is cooling using recirculated cooling water spacer inside crystallizer, inflow temperature is 25~
28 DEG C, leaving water temperature is not higher than 60 DEG C, and copper liquid condenses into solid in crystallizer, and connects by the traction roller mechanism in conticaster
It is continuous to pull out to form pipe；Wherein, traction temperature setting is 1160 DEG C, and hauling speed is set as 420mm/min.
(3) after the pipe being first passed through sawing and milling face, 340 then are preheated in the induction heater of argon gas protection
℃；Then three-roll planetary rolling is carried out, shell is obtained；Wherein, rolling temperature is 720 DEG C, mill speed 20m/min.
(4) by plate drawing machine cold drawn forming after shell is cooling, the copper pipe made does not have stomata, crackle, ear, burr
Etc. bad defect；It is made annealing treatment under annealing furnace nitrogen or argon atmosphere protection again, to eliminate stress.Wherein, annealing temperature
Preferably 600 DEG C of degree, annealing time 60min.
Embodiment 2
A kind of preparation method of copper pipe, comprising the following steps:
(1) phosphorized copper, Cu-B alloy, metallic tin and rare earth alloy are mixed, obtains copper liquid through smelting furnace melting, makes copper liquid
The mass fraction of middle boron is 0.003%, and the mass fraction of tin is 0.38% and the mass fraction of rare earth element is 0.0045%, remaining
Amount is copper and impurity, and less than 0.15%, rare earth alloy is made of content of impurities the lanthanum that mass ratio is 1:0.45 and cerium.
(2) the charcoal slag that a layer thickness is 230mm is spread on copper liquid surface, is passed through inert gas in Xiang Suoshu smelting furnace, then
The crystallizer of conticaster is protruded into copper liquid, it is cooling using recirculated cooling water spacer inside crystallizer, inflow temperature is 25~
28 DEG C, leaving water temperature is not higher than 60 DEG C, and copper liquid condenses into solid in crystallizer, and connects by the traction roller mechanism in conticaster
It is continuous to pull out to form pipe；Wherein, traction temperature setting is 1150 DEG C, and hauling speed is set as 430mm/min.
(3) after the pipe being first passed through sawing and milling face, 340 then are preheated in the induction heater of argon gas protection
℃；Then three-roll planetary rolling is carried out, shell is obtained；Wherein, rolling temperature is 730 DEG C, mill speed 23m/min.
(4) by plate drawing machine cold drawn forming after shell is cooling, the copper pipe made does not have stomata, crackle, ear, burr
Etc. bad defect；It is made annealing treatment under annealing furnace nitrogen or argon atmosphere protection again, to eliminate stress.Wherein, annealing temperature
Preferably 550 DEG C of degree, annealing time 50min.
Embodiment 3
A kind of preparation method of copper pipe, comprising the following steps:
(1) phosphorized copper, Cu-B alloy, metallic tin and rare earth alloy are mixed, obtains copper liquid through smelting furnace melting, makes copper liquid
The mass fraction of middle boron is 0.005%, and the mass fraction of tin is 0.32% and the mass fraction of rare earth element is 0.005%, remaining
Amount is copper and impurity, and less than 0.15%, rare earth alloy is made of content of impurities the lanthanum that mass ratio is 1:0.5 and cerium.
(2) the charcoal slag that a layer thickness is 200mm is spread on copper liquid surface, is passed through inert gas in Xiang Suoshu smelting furnace, then
The crystallizer of conticaster is protruded into copper liquid, it is cooling using recirculated cooling water spacer inside crystallizer, inflow temperature is 25~
28 DEG C, leaving water temperature is not higher than 60 DEG C, and copper liquid condenses into solid in crystallizer, and connects by the traction roller mechanism in conticaster
It is continuous to pull out to form pipe；Wherein, traction temperature setting is 1140 DEG C, and hauling speed is set as 440mm/min.
(3) after the pipe being first passed through sawing and milling face, 350 then are preheated in the induction heater of argon gas protection
℃；Then three-roll planetary rolling is carried out, shell is obtained；Wherein, rolling temperature is 740 DEG C, mill speed 20m/min.
(4) by plate drawing machine cold drawn forming after shell is cooling, the copper pipe made does not have stomata, crackle, ear, burr
Etc. bad defect；It is made annealing treatment under annealing furnace nitrogen or argon atmosphere protection again, to eliminate stress.Wherein, annealing temperature
Preferably 700 DEG C of degree, annealing time 30min.
Embodiment 4
A kind of preparation method of copper pipe, comprising the following steps:
(1) phosphorized copper, Cu-B alloy, metallic tin and rare earth alloy are mixed, obtains copper liquid through smelting furnace melting, makes copper liquid
The mass fraction of middle boron is 0.008%, and the mass fraction of tin is 0.32% and the mass fraction of rare earth element is 0.008%, remaining
Amount is copper and impurity, and less than 0.15%, rare earth alloy is made of content of impurities the lanthanum that mass ratio is 1:0.45 and cerium.
(2) the charcoal slag that a layer thickness is 250mm is spread on copper liquid surface, is passed through inert gas in Xiang Suoshu smelting furnace, then
The crystallizer of conticaster is protruded into copper liquid, it is cooling using recirculated cooling water spacer inside crystallizer, inflow temperature is 25~
28 DEG C, leaving water temperature is not higher than 60 DEG C, and copper liquid condenses into solid in crystallizer, and connects by the traction roller mechanism in conticaster
It is continuous to pull out to form pipe；Wherein, traction temperature setting is 1150 DEG C, and hauling speed is set as 420mm/min.
(3) after the pipe being first passed through sawing and milling face, 340 then are preheated in the induction heater of argon gas protection
℃；Then three-roll planetary rolling is carried out, shell is obtained；Wherein, rolling temperature is 720 DEG C, mill speed 25m/min.
(4) by plate drawing machine cold drawn forming after shell is cooling, the copper pipe made does not have stomata, crackle, ear, burr
Etc. bad defect；It is made annealing treatment under annealing furnace nitrogen or argon atmosphere protection again, to eliminate stress.Wherein, annealing temperature
Preferably 650 DEG C of degree, annealing time 40min.
Embodiment 5
A kind of preparation method of copper pipe, comprising the following steps:
(1) phosphorized copper, Cu-B alloy, metallic tin and rare earth alloy are mixed, obtains copper liquid through smelting furnace melting, makes copper liquid
The mass fraction of middle boron is 0.01%, and the mass fraction of tin is 0.3% and the mass fraction of rare earth element is 0.01%, and surplus is
Copper and impurity, less than 0.15%, rare earth alloy is made of content of impurities the lanthanum that mass ratio is 1:0.4 and cerium.
(2) the charcoal slag that a layer thickness is 230mm is spread on copper liquid surface, is passed through inert gas in Xiang Suoshu smelting furnace, then
The crystallizer of conticaster is protruded into copper liquid, it is cooling using recirculated cooling water spacer inside crystallizer, inflow temperature is 25~
28 DEG C, leaving water temperature is not higher than 60 DEG C, and copper liquid condenses into solid in crystallizer, and connects by the traction roller mechanism in conticaster
It is continuous to pull out to form pipe；Wherein, traction temperature setting is 1140 DEG C, and hauling speed is set as 450mm/min.
(3) after the pipe being first passed through sawing and milling face, 340 then are preheated in the induction heater of argon gas protection
℃；Then three-roll planetary rolling is carried out, shell is obtained；Wherein, rolling temperature is 750 DEG C, mill speed 25m/min.
(4) by plate drawing machine cold drawn forming after shell is cooling, the copper pipe made does not have stomata, crackle, ear, burr
Etc. bad defect；It is made annealing treatment under annealing furnace nitrogen or argon atmosphere protection again, to eliminate stress；Wherein, annealing temperature
Preferably 600 DEG C of degree, annealing time 50min.
Comparative example 1
The difference from embodiment 1 is that: in step (1), the mass fraction of tin is replaced with 0.5%；Other same embodiments
1。
Comparative example 2
The difference from embodiment 1 is that: in step (1), the mass fraction of tin is replaced with 0.2%；Other same embodiments
1。
Comparative example 3
The difference from embodiment 1 is that: in step (1), the mass fraction of rare earth element is replaced with 0.003%；It is other
With embodiment 1.
Comparative example 4
The difference from embodiment 1 is that: in step (1), the mass fraction of rare earth element is replaced with 0.02%；It is other same
Embodiment 1.
Comparative example 5
The difference from embodiment 1 is that: in step (1), phosphorized copper is directly obtained into copper liquid through smelting furnace melting；It is other same
Embodiment 1.
Tensile strength, compression strength, yield strength, anti-corrosion is carried out to copper pipe prepared by Examples 1 to 5 and comparative example 1~5
Property and heat resistance are tested, and test result is as follows shown in table 1.
Wherein, it tensile strength: is measured according to GBT228-2002 standard.
Compression strength: it is measured according to GBT18033-2007 standard.
Yield strength: it is measured according to GBT18033-2007 standard
Corrosion resistance: it is measured according to GBT10125-1997 standard.
Table 1
| Project | Tensile strength | Compression strength | Yield strength | Corrosion resistance |
| Embodiment 1 | 300Mpa | 170Mpa | 250Mpa | Well |
| Embodiment 2 | 290Mpa | 190Mpa | 260Mpa | Well |
| Embodiment 3 | 350Mpa | 200Mpa | 280Mpa | Well |
| Embodiment 4 | 320Mpa | 200Mpa | 270Mpa | Well |
| Embodiment 5 | 310Mpa | 180Mpa | 270Mpa | Well |
| Comparative example 1 | 150Mpa | 90Mpa | 240Mpa | It is poor |
| Comparative example 2 | 190Mpa | 100Mpa | 230Mpa | It is poor |
| Comparative example 3 | 160Mpa | 90Mpa | 250Mpa | It is poor |
| Comparative example 4 | 200Mpa | 110Mpa | 250Mpa | It is poor |
| Comparative example 5 | 180Mpa | 120Mpa | 260Mpa | It is poor |
By upper table 1 it is found that copper pipe prepared by the present invention tensile strength with higher, advantages of higher compressive strength and good
Corrosion resistance.
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within of the invention
Within protection scope and the open scope.
Claims (10)
1. an Albatra metal, it is characterised in that: by the gross mass of the copper alloy be very in terms of, including following mass percent
Component: boron 0.001~0.01%, tin 0.3~0.4% and rare earth element 0.0036~0.01%, surplus be copper and impurity.
2. copper alloy according to claim 1, it is characterised in that: the impurity includes sulphur and phosphorus, and the impurity always contains
Amount is less than 0.15%.
3. copper alloy according to claim 1, it is characterised in that: the rare earth element includes lanthanum and cerium, the lanthanum and cerium
Mass ratio be 1:(0.4~0.5).
4. a kind of preparation method of copper pipe, it is characterised in that: include:
Copper substrate, Cu-B alloy, metallic tin and rare earth alloy are mixed, copper liquid is obtained through smelting furnace melting, makes boron in the copper liquid
Mass fraction be 0.001~0.01%, the mass fraction of tin is 0.3~0.4% and the mass fraction of rare earth element is
0.0036~0.01%, surplus is copper and impurity；
It is passed through inert gas into the smelting furnace, is in then solid by the cooling condensation of crystallizer, and form pipe through continuous traction
Base；
The pipe is subjected to three-roll planetary rolling.
5. the preparation method of copper pipe according to claim 4, it is characterised in that: the impurity includes sulphur and phosphorus, described miscellaneous
The total content of matter is less than 0.15%.
6. the preparation method of copper pipe according to claim 4, it is characterised in that: the Copper substrate is phosphorized copper；It is described
Rare earth element includes lanthanum and cerium, and the mass ratio of the lanthanum and cerium is 1:(0.4~0.5).
7. the preparation method of copper pipe according to claim 4, it is characterised in that: the smelting temperature is 1180~1200
℃；Before being passed through inert gas into the smelting furnace, one layer of covering is spread on the copper liquid surface.
8. the preparation method of copper pipe according to claim 4, it is characterised in that: the crystallizer using recirculated cooling water every
Set cooling, the inflow temperature of cooling water are 25~28 DEG C, and leaving water temperature is not higher than 60 DEG C；The traction temperature is 1140~1160
DEG C, the hauling speed is 420~450mm/min.
9. the preparation method of copper pipe according to claim 4, it is characterised in that: rolled by pipe progress three-roller planetary
Before system, the pipe is first preheated to 340~350 DEG C in the induction heater of argon gas protection；The rolling temperature be 720~
750 DEG C, the mill speed is 20~25m/min.
10. a kind of copper pipe, it is characterised in that: the copper pipe by the described in any item copper pipes of claim 4~9 preparation method system
It is standby to obtain.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111500890A (en) * | 2020-04-27 | 2020-08-07 | 美的集团股份有限公司 | Copper pipe and manufacturing method thereof, heat exchanger, air conditioner and refrigeration equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071335A (en) * | 2011-01-31 | 2011-05-25 | 金龙精密铜管集团股份有限公司 | Novel copper alloy and copper alloy pipe |
| CN103343258A (en) * | 2013-06-18 | 2013-10-09 | 山东亨圆铜业有限公司 | Preparation method of high-strength corrosion-resistant copper pipe for heat exchanger |
-
2018
- 2018-12-17 CN CN201811543899.6A patent/CN109402447B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071335A (en) * | 2011-01-31 | 2011-05-25 | 金龙精密铜管集团股份有限公司 | Novel copper alloy and copper alloy pipe |
| CN103343258A (en) * | 2013-06-18 | 2013-10-09 | 山东亨圆铜业有限公司 | Preparation method of high-strength corrosion-resistant copper pipe for heat exchanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111500890A (en) * | 2020-04-27 | 2020-08-07 | 美的集团股份有限公司 | Copper pipe and manufacturing method thereof, heat exchanger, air conditioner and refrigeration equipment |
| WO2021218737A1 (en) * | 2020-04-27 | 2021-11-04 | 美的集团股份有限公司 | Copper pipe and manufacturing method therefor, heat exchanger, air conditioner and refrigeration device |
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