CN108559895A - Corrosion-resistant ground connection alloy of one kind and preparation method thereof - Google Patents
Corrosion-resistant ground connection alloy of one kind and preparation method thereof Download PDFInfo
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- CN108559895A CN108559895A CN201810420323.4A CN201810420323A CN108559895A CN 108559895 A CN108559895 A CN 108559895A CN 201810420323 A CN201810420323 A CN 201810420323A CN 108559895 A CN108559895 A CN 108559895A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
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- 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
- C22C1/026—Alloys based on aluminium
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- 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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/02—Pretreatment of the material to be coated
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
- C23C8/12—Oxidising using elemental oxygen or ozone
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Abstract
The invention discloses a kind of corrosion-resistant ground connection alloys and preparation method thereof, are related to grounded metal technical field.A kind of ingredient of corrosion-resistant ground connection alloy of the present invention is Al:94% 96%, Cu:3% 5%, RE:0.05% 0.1% and inevitable impurity element；Preparation method includes the following steps：Step 1 requires to carry out dispensing according to ground connection alloy each component；Step 2, melting obtain alloy molten solution；Step 3 is poured into a mould in the interior of vacuum；Step 4 carries out homogenizing annealing to casting；Step 5, bead；Step 6 carries out pre-oxidation treatment to cast(ing) surface.The present invention by adding trace rare-earth element in the alloy; reach crystal grain thinning; improve each microcell elecrtonegativity of material surface; stablize protection film layer; increase corrosion resistance, replaces fine copper using aluminium alloy, reduce cost; reach identical electric conductivity, solves existing copper, zinc will produce heavy metal pollution problem to environment.
Description
Technical field
The invention belongs to grounded metal technical field, more particularly to a kind of corrosion-resistant ground connection alloy and one kind is corrosion-resistant connects
Ground alloy preparation method.
Background technology
Environment-friendly type alloy ground material full-time design is protruded than advantage, is solved current electric grid and is grounded etching problem.With it
The grounded screen useful life period can significantly be extended by substituting galvanized steel, improve operational reliability and energy utilization rate；It is substituted with it
Fine copper or copper clad steel can reduce the material and construction cost of earth work；For extending the service life of grounded screen, ensureing power grid
Safety, reduction ground mat construction and maintenance cost are of great significance.
Photovoltaic industry is as New Energy Industry, and development is swift and violent in recent years, and photovoltaic module ground connection is that quilt is easy in photovoltaic industry
Ignorance but a highly important ring are broadly divided into forceful electric power ground connection and light current ground connection, and forceful electric power ground connection refers to lightning protection, and light current, which is grounded, to be referred to
Working earthing and safety ground, being grounded currently on the market mainly according to the selection of safety and benefit has galvanized steel, fine copper, copper clad steel
Three types.
Galvanized steel：Do not have essential Long-effect corrosion-resistant characteristic in the soil, buries underground for a long time, the ground connection electricity in by soil
Stream, stray electrical current, chemistry and the multiple corrosiveness such as electrochemistry and lead to short term failure；There is heavy corrosion, ground resistance liter
Height cannot meet grounded screen electricity function index requirement, easily cause fault spread when power grid is by thunder and lightning or short circuit.
Fine copper, copper clad steel：Fine copper or copper clad steel have preferable ground connection electrical and corrosion resistance, long lifespan, stability
It is good, but material price is high, and construction cost is big, and copper product will produce heavy metal to the anodic attack problem of circumferential metal to environment
Pollution.
Reduce the underground embedment amount of the heavy metals such as copper, zinc, the weight of holding, particularly water head site for the following soil quality
The reduction of concentration of metal ions has environmental-protection function.
Application publication number is that CN 104651677A disclose a kind of aluminium piston alloy, and chemical constituent includes：Copper Cu：
1.0%~1.5%, Mg：0.4%~1%, Si：11%~13%, Fe：0.6%~1%, Mn：0.3%~0.9%, Re：
0.8%~1.4%, Sn：0.001%~0.005%, Pb：0.001%~0.005%, Zn：0.01%~0.15%, Cr：
0.01%~0.09%, Ti：0.06%~0.18%, remaining is Al and inevitable impurity.
Invention content
The purpose of the present invention is to provide a kind of alloy ground structure, ground connection alloy and preparation methods, add in the alloy
Trace rare-earth element reaches crystal grain thinning, improves each microcell elecrtonegativity of material surface, stablizes protection film layer, increases corrosion resistance
Can, fine copper is replaced using aluminium alloy, cost is reduced, reaches identical electric conductivity, solve existing copper, zinc will produce environment
Heavy metal pollution problem.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
The present invention is a kind of corrosion-resistant ground connection alloy, and the ingredient of the ground connection alloy is Al:94%-96%, Cu:3%-
5%, RE:0.05%-0.1% and inevitable impurity element.
A kind of preparation method of corrosion-resistant ground connection alloy, includes the following steps：
Step 1, dispensing：It requires to carry out dispensing according to ground connection alloy each component；
The cathode copper of raw material selection 99.5%, 99.9% pure aluminum plate, rare earth element are added in the form of intermediate alloy；
Step 2, melting：Smelting furnace is warming up to 200 DEG C to preheat 20-30 minutes, is warming up to 400 DEG C of input raw material A l, and
Constant temperature 30 minutes is handled, then temperature is risen to 700-800 DEG C with the speed of 20 DEG C/min, wait for raw material A l be in fritting state with
40-50 DEG C/min speed is rapidly heated to 1100 DEG C of input raw material Cu and rare earth intermediate alloy, is warming up to 1200-1300 DEG C and perseverance
Warm melting is with alloy molten solution；
Step 3, casting：It is poured into a mould in the interior of vacuum, cast while carries out gas pressurized, and pressure is maintained at 0.5-
1.0MPa, casting complete rear demoulding；
Step 4, heat treatment：The casting that step 3 is obtained carries out homogenizing annealing；Homogenizing annealing process is in 600-
It constant temperature 6-8 hours at 650 DEG C, constant temperature 1-2 hours at 300-400 DEG C, is warming up under 450-500 DEG C of constant temperature 2-3 hours, cools down
It constant temperature 4-6 hours to 300-400 DEG C, takes out casting and is placed on cooling frame, cast(ing) surface is sprayed to liquid nitrogen spray or dry ice
It is cooled down；
Step 5, shot-peening：Thermally treated casting is warming up at 230-280 DEG C constant temperature 4-6 hours, 170- is being cooled to
Constant temperature 2-3 hours at 200 DEG C, to the carry out bead of casting；
Step 6, pre-oxidation treatment：Casting is put into using inert gas as in the environment of atmosphere, and is warming up to 200-500
DEG C, it blows to cast(ing) surface with the oxygen of 20%-50% purity and carries out pre-oxidation treatment.
Further, step 2 melting, need to be under vacuum or inert gas shielding to fine aluminium before putting into raw material A l
The surface of plate carries out polishing peeling processing；The depth of polishing peeling is 0.5-1mm, the inert gas select helium or neon and
Argon gas；On the surface of pure aluminum plate, brush covers one layer of grease to completely cut off air after polishing.
Further, step 2 melting need to carry out solution abundant before input raw material Cu and rare earth intermediate alloy
Deoxidation, degasification and slagging-off pretreatment.
Further, step 2 melting is that melting is carried out under vacuum or inert gas shielding；The inert gas choosing
With helium or neon and argon gas.
Further, it is 0.18MPa that pressure is sprayed during step 5 bead；The grain size of kirsite bullet is
0.075mm；The shot-peening time is 90 minutes.
Further, during step 3 casting, casting mould need to be cleaned in advance and brush covers one layer in casting mould
High temperature-resistant grease.
The invention has the advantages that：
1, the present invention adds trace rare-earth element in the alloy, reaches crystal grain thinning, improves each microcell negative electricity of material surface
Property, stablize protection film layer, increase corrosion resistance, fine copper is replaced using aluminium alloy, reduce cost, reaches identical electric conductivity,
Solves existing copper, zinc will produce heavy metal pollution problem to environment.
2, the present invention effectively raises ground connection alloy by carrying out shot-peening and surface preoxidizing processing to ground connection alloy
Hardness, and by forming a protective layer of alumina in ground connection alloy surface, improve the corrosion resistance of ground connection alloy.
3, ground connection alloy of the invention has high-corrosion resistance, low cost, the good advantage of electric conductivity.
4, the density of alloy material of the invention is the 1/3 of galvanized steel, and carrying, construction are more convenient.
5, present invention ground connection alloy is consistent with welding point material, and the ingredient of welding material and ground connection net materials is close, no
It will produce electrochemical corrosion.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Specific implementation mode
Embodiment 1
A kind of corrosion-resistant ground connection alloy, the ingredient for being grounded alloy are Al:95%, Cu:4%, RE:It 0.1% and can not keep away
The impurity element exempted from.
A kind of preparation method of corrosion-resistant ground connection alloy, includes the following steps：
Step 1, dispensing：It requires to carry out dispensing according to ground connection alloy each component；
The cathode copper of raw material selection 99.5%, 99.9% pure aluminum plate, rare earth element are added in the form of intermediate alloy；
Step 2, melting：Smelting furnace is warming up to 200 DEG C to preheat 20-30 minutes, is warming up to 400 DEG C of input raw material A l, and
Constant temperature 30 minutes is handled, then temperature is risen to 700-800 DEG C with the speed of 20 DEG C/min, wait for raw material A l be in fritting state with
40-50 DEG C/min speed is rapidly heated to 1100 DEG C of input raw material Cu and rare earth intermediate alloy, is warming up to 1200-1300 DEG C and perseverance
Warm melting is with alloy molten solution；
Step 3, casting：It is poured into a mould in the interior of vacuum, cast while carries out gas pressurized, and pressure is maintained at 0.5-
1.0MPa, casting complete rear demoulding；
Step 4, heat treatment：The casting that step 3 is obtained carries out homogenizing annealing；Homogenizing annealing process is in 600-
It constant temperature 6-8 hours at 650 DEG C, constant temperature 1-2 hours at 300-400 DEG C, is warming up under 450-500 DEG C of constant temperature 2-3 hours, cools down
It constant temperature 4-6 hours to 300-400 DEG C, takes out casting and is placed on cooling frame, cast(ing) surface is sprayed to liquid nitrogen spray or dry ice
It is cooled down；
Step 5, shot-peening：Thermally treated casting is warming up at 230-280 DEG C constant temperature 4-6 hours, 170- is being cooled to
Constant temperature 2-3 hours at 200 DEG C, to the carry out bead of casting；
Step 6, pre-oxidation treatment：Casting is put into using inert gas as in the environment of atmosphere, and is warming up to 200-500
DEG C, it blows to cast(ing) surface with the gas of the oxygen of 20%-50% purity and carries out pre-oxidation treatment.
Wherein, step 2 melting, need to be under vacuum or inert gas shielding to the surface of pure aluminum plate before putting into raw material A l
Carry out polishing peeling processing；The depth of polishing peeling is 0.5-1mm, and inert gas selects helium or neon and argon gas, after polishing
On the surface of pure aluminum plate, brush covers one layer of grease to completely cut off air, prevents the surface of pure aluminum plate from being generated aluminum oxide film by air oxidation
And influence pure aluminum plate melting.
Wherein, 400 DEG C of input raw material A l are warming up in step 2, and constant temperature is convenient for the surface coated in aluminium sheet in 30 minutes
Grease volatilization is removed generates the impurity particles such as charcoal influence alloy purity without burning.
Wherein, step 2 melting is before input raw material Cu and rare earth intermediate alloy, solution need to be carried out sufficient deoxidation,
Degasification and slagging-off pre-process.
Wherein, step 2 melting is that melting is carried out under vacuum or inert gas shielding；Inert gas selects helium or neon
And argon gas.
Wherein, it is 0.18MPa that pressure is sprayed during step 5 bead；The grain size of kirsite bullet is 0.075mm；
The shot-peening time is 90 minutes.
Wherein, during step 3 casting, casting mould need to be cleaned in advance and brush covers one layer of oil resistant in casting mould
Fat avoids casting and mold adhesion, facilitates and carries out later stage demoulding.
Wherein, in step 6 pre-oxidation treatment, in the gas of the oxygen of 20%-50% purity except for oxygen, remaining component is
Nitrogen and inevitably other magazine gases；Including elder generation with the gas flow rate of 0.15-0.25m/s, with 20-30% purity
Oxygen treatments applied 10-20 minutes, with the gas flow rate of 0.25-0.5m/s, with oxygen treatments applied 10-20 minutes of 30-50% purity；
Cast(ing) surface is blowed to using the gas slowly of low-purity oxygen, and is carried out at a high temperature of 200-500 DEG C simultaneously, it is convenient in casting
Surface quickly forms the uniform moderate dense oxide aluminium film of a layer thickness to improve the oxidation and corrosion performance of casting.
Embodiment 2
Corrosion resistance, resistivity and the density of galvanized steel, fine copper and ground connection alloy are tested respectively；Simultaneously to ground connection
Alloy switching performance is tested, and test result see the table below one and table two：
Table one：Corrosion resistance, resistivity, density measurement Comparative result：
| Corrosion rate (mm/a) | Resistivity (10-8Ω·m) | Density (10g/cm3) | |
| Galvanized steel | 0.065 | 17 | 7.8 |
| Fine copper | 0.008 | 2 | 8.9 |
| It is grounded alloy | 0.01 | 3.7 | 2.95 |
As shown in Table 1, the corrosion resistance of alloy is grounded compared with galvanized steel, and corrosion-resistant speed is 6-7 times of galvanized steel；It connects
Ground alloy conductive rate is 4 times of galvanized steel；It is copper and zinc-plated 1/3 to be grounded alloy same volume weight, and volume cost is low.
Table two：It is grounded alloy switching performance test result：
As shown in Table 2, ground connection alloy material has excellent switching performance and thermal stability.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the present invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the present invention
Principle and practical application, to enable skilled artisan to be best understood by and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (6)
1. a kind of corrosion-resistant ground connection alloy, which is characterized in that the ingredient of the ground connection alloy is Al:94%-96%, Cu:3%-
5%, RE:0.05%-0.1% and inevitable impurity element.
2. a kind of preparation method of corrosion-resistant ground connection alloy as described in claim 1, which is characterized in that include the following steps：
Step 1, dispensing：It requires to carry out dispensing according to ground connection alloy each component；
The cathode copper of raw material selection 99.5%, 99.9% pure aluminum plate, rare earth element are added in the form of intermediate alloy；
Step 2, melting：Smelting furnace is warming up to 200 DEG C to preheat 20-30 minutes, is warming up to 400 DEG C of input raw material A l, and constant temperature
It handles, then temperature is risen to 700-800 DEG C with the speed of 20 DEG C/min within 30 minutes, wait for that raw material A l is in fritting state with 40-50
DEG C/min speed is rapidly heated to 1100 DEG C of input raw material Cu and rare earth intermediate alloy, it is warming up to 1200-1300 DEG C and constant temperature is molten
Refining is with alloy molten solution；
Step 3, casting：It is poured into a mould in the interior of vacuum, cast while carries out gas pressurized, and pressure is maintained at 0.5-
1.0MPa, casting complete rear demoulding；
Step 4, heat treatment：The casting that step 3 is obtained carries out homogenizing annealing；Homogenizing annealing process is at 600-650 DEG C
Lower constant temperature 6-8 hours is warming up under 450-500 DEG C of constant temperature 2-3 hours, is cooled to constant temperature 1-2 hours at 300-400 DEG C
Constant temperature 4-6 hours at 300-400 DEG C, take out casting simultaneously be placed on cooling frame, with liquid nitrogen spray or dry ice spray to cast(ing) surface into
Row cooling；
Step 5, shot-peening：Thermally treated casting is warming up at 230-280 DEG C constant temperature 4-6 hours, is being cooled to 170-200 DEG C
Lower constant temperature 2-3 hours, to the carry out bead of casting；
Step 6, pre-oxidation treatment：Casting is put into using inert gas as in the environment of atmosphere, and is warming up to 200-500 DEG C, is used
The oxygen of 20%-50% purity blows to cast(ing) surface and carries out pre-oxidation treatment.
3. a kind of preparation method of corrosion-resistant ground connection alloy according to claim 2, which is characterized in that the step 2 is molten
Refining need to carry out polishing peeling processing under vacuum or inert gas shielding before putting into raw material A l to the surface of pure aluminum plate；It beats
The depth for grinding off skin is 0.5-1mm, and the inert gas selects helium or neon and argon gas；It is brushed on the surface of pure aluminum plate after polishing
One layer of grease is covered to completely cut off air.
4. a kind of preparation method of corrosion-resistant ground connection alloy according to claim 2, which is characterized in that the step 2 is molten
Refining need to carry out solution sufficient deoxidation, degasification and slagging-off and pre-process before input raw material Cu and rare earth intermediate alloy.
5. a kind of preparation method of corrosion-resistant ground connection alloy according to claim 2, which is characterized in that the step 2 is molten
Refining is that melting is carried out under vacuum or inert gas shielding；The inert gas selects helium or neon and argon gas.
6. a kind of preparation method of corrosion-resistant ground connection alloy according to claim 2, which is characterized in that step 5 spray
It is 0.18MPa that pressure is sprayed in ball processing procedure；The grain size of kirsite bullet is 0.075mm；The shot-peening time is 90 minutes.
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| CN110029253A (en) * | 2019-06-01 | 2019-07-19 | 合肥磊科机电科技有限公司 | A kind of environmental protection highly corrosion resistant electric power copper Al rare earth alloy material and preparation method thereof |
| CN110252959A (en) * | 2019-06-25 | 2019-09-20 | 巢湖市聚源机械有限公司 | A kind of press machine lower and upper cross-member casting technique |
| CN110265801A (en) * | 2019-07-18 | 2019-09-20 | 国网山东省电力公司电力科学研究院 | A kind of environment-friendly type aluminum bronze rare earth alloy vertical grounding electrode and preparation method thereof |
| CN111424198A (en) * | 2020-04-09 | 2020-07-17 | 北京国网弘泰科技有限公司 | Corrosion-resistant aluminum alloy grounding material and manufacturing method thereof |
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| CN110252959A (en) * | 2019-06-25 | 2019-09-20 | 巢湖市聚源机械有限公司 | A kind of press machine lower and upper cross-member casting technique |
| CN110265801A (en) * | 2019-07-18 | 2019-09-20 | 国网山东省电力公司电力科学研究院 | A kind of environment-friendly type aluminum bronze rare earth alloy vertical grounding electrode and preparation method thereof |
| CN110265801B (en) * | 2019-07-18 | 2024-05-31 | 国网山东省电力公司电力科学研究院 | Environment-friendly aluminum-copper-rare earth alloy vertical grounding electrode and preparation method thereof |
| CN111424198A (en) * | 2020-04-09 | 2020-07-17 | 北京国网弘泰科技有限公司 | Corrosion-resistant aluminum alloy grounding material and manufacturing method thereof |
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