CN107201537A - A kind of of the same race or different alloys connection methods - Google Patents
A kind of of the same race or different alloys connection methods Download PDFInfo
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- CN107201537A CN107201537A CN201710357714.1A CN201710357714A CN107201537A CN 107201537 A CN107201537 A CN 107201537A CN 201710357714 A CN201710357714 A CN 201710357714A CN 107201537 A CN107201537 A CN 107201537A
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- connection
- fused salt
- same race
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- different alloys
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/66—Electroplating: Baths therefor from melts
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
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Abstract
Connection method between a kind of of the same race or different alloys, belongs to Material Joining Technology field.Comprise the following steps that:1. pre-processed before connecting：First according to specific environment and connecting portion, connected piece and W materials are cut according to required shape, after polishing, polishing, oil removing, connected piece connecting portion is bundled with Ni and fixed.2. connection procedure is implemented：Using pulse plating power, with Pt connection negative electrode connected pieces and anode W, Na is put into2WO4、WO3In the fused salt of fusing, implement plate bonding link in the environment of 800~900 DEG C, electrodeposition time is determined with specific reference to the size and connecting portion of connected piece, generally higher than 30h.3. later processing stage：The sample connected is taken out from electrolyte, the NaOH aqueous solution, acetone and deionized water is respectively adopted and carefully washes the fused salt of attachment off, is dried up after washing with cold wind.Present invention process flow operations are simple, and compared to electric welding connection, connecting portion more even compact, flawless, join domain surface oxygen content is low.
Description
Technical field
The invention belongs to field of electroplating, it is related to the connection method of two kinds of metals of connection, it is particularly a kind of to be used for nuclear fusion stack
Interconnection technique between plasma facing material, of the same race or dissimilar metal.
Background technology
Copper and its alloy are main using molten during processing because of the description of materials of selection and the difference of structure type
Weldering, the method for Pressure Welding and soldering realize connection.The characteristics of due to copper and its alloy thermophysical property, normal melting welding and
Easily there is following subject matter in soldering：(1) welded post welding distortion is big.(2) weld seam and fusion area are also easy to produce stomata.
(3) weld seam Huo Jinfeng areas are also easy to produce crackle.To sum up told：Copper and copper alloy are connected with conventional connection methods, postwelding crystal grain becomes big,
Alloy is burnt during welding, and the eutectiferous presence of fragility and the presence of various defects result in weld metal zone plasticity and toughness in crystal boundary
Significantly reduce.The mechanical performance of its welding point can not be fully guaranteed, and welding cost is high.
The present invention uses fused salt electro-deposition techniques, and coating is linked together copper alloy using material W, and technique is simple, into
This is low, and practicality is stronger.Especially in Aero-Space and nuclear power field, for the connection of the less copper alloy of the bodily form, have well
Application prospect.And W is as the material of high atomic number, relative to candidate materials such as Be, C, B of low atomic number, with Gao Rong
Point, low sputtering etching speed, low tritium are detained and high from the advantages of sputtering threshold values, are chosen as in PFC (towards plasma source components)
Heat sink material, be to be connected to have important references meaning to the development of nuclear fusion material with W coatings on this heat sink material copper alloy.
In this context, expanded, such a connection method is not limited between a kind of material, the foreign material such as steel and molybdenum
Between, if can in this molten salt system electro-deposition W coatings, can be carried out the method connection, scope is very wide.
Patent CN 101494322A disclose a kind of tungsten copper connection method, first by copper metal in 1150~1200 DEG C of vacuum
Cladding is on tungsten waved surface, then stacks and be assembled into weldment, 850~900 DEG C of pressure diffusions weldering connections in vacuum chamber.This method
Avoid and welded using conventional solder or intermediate layer, but the party must be the connection material with copper as transition between connector
Material, relative to have limitation, the position entirely connected is confined to the contact area in face and face, can not realize and wrap up join domain
The function of getting up, and upper 1000 DEG C of high temperature melting and coating process, also there is very high requirement to equipment.
The content of the invention
The present invention is solved it is a key issue that connect the alloy materials such as copper, steel, molybdenum by using the mode of pulse plating,
The problem of connecting copper and alloy material, welding position poor performance with the mode of welding is made up, and under particular surroundings, it is impossible to use
It is welded to connect the methods such as copper, molybdenum part.
The technical scheme is that：
A kind of connection method between of the same race or different alloys part：
(1) pre-connection of connector
After at least two pieces of the same race or different alloys that needs are attached, shape needed for being processed into, removed using alkali lye
The grease of matrix surface, polishes and smooth flawless surface is obtained after polishing, the alloy after polishing is clear through deionized water
Wash, ultrasonic wave washes of absolute alcohol, then dry after being cleaned with acetone ultrasonic wave；According to required connecting portion by the alloy Ni
Silk is fixed, and is used as cathode material.
(2) anode prepares
The grease of matrix surface is removed after pure W plates are processed using alkali lye, successively with 240#, 500#, 800#,
1200#, 2000# sand paper are polished, and then using 2.5dum diamond polishings agent mechanical polishing, obtain smooth flawless surface,
Sample after polishing is cleaned through deionized water, ultrasonic wave washes of absolute alcohol, then is dried after being cleaned with acetone ultrasonic wave, is used as sun
It is extremely standby.
(3) preparation of fused salt is electroplated
Respectively to Na2WO4And WO3Drying and dewatering processing is carried out, after being weighed by preset ratio, is ground and well mixed conduct
Fused salt is electroplated, it is standby.
(4) connection procedure is implemented
The plating fused salt is put into crucible, high temperature resistance furnace is put into, is increased to 5 DEG C/min heating rate specified
800~900 DEG C of temperature, constant temperature 60min makes the abundant melting of fused salt, and composition is uniform；The negative electrode and anode are connected to Pt
On electroplating power supply, it is put into the plating fused salt of melting, according to the alloy species of connector, the thickness of required articulamentum, is adjusted to
Parameter preset, switches on power, and starts plating.
(5) later processing stage：After electro-deposition terminates, sample is taken out from electrolyte, 10mol%NaOH water is respectively adopted
Solution, acetone and deionized water carefully wash the ionic liquid of attachment off, are dried up after washing with cold wind.
Further, connected piece can be that same material can also be foreign material, for example：Copper and copper, copper and steel, steel
With steel, steel and molybdenum, zirconium and steel etc., as long as in this molten salt system, tungsten coating can be electroplated out, such a method can be passed through
It is attached.
Further, the cutting profile for being connected material can be block or tabular and strip etc., can be according to specific
Actual demand selected.
Further, it will be wrapped up around connector by pure W coatings, coating will be more than 260 μm with column crystals growth, thickness,
Two pieces turns into an entirety, naturally it is also possible to be the connection of three entirety.
The present invention is had the advantage that compared with prior art：
(1) present invention process flow is simple, workable, efficiency high.
(2) present invention while original component capabilities are kept, does not allow more to become connector relative to part is welded to connect
Shape, maintains original geomery of part.
(3) connecting portion coating of the present invention, surface even compact, flawless, the porosity are low.
(4) connector is fabricated to the shape of needs by the present invention according to the complex situations being likely to occur in actual use,
Plating is implemented at the position of connection member, and flexibility is strong.
(5) material that the present invention is connected is a variety of, can be of the same race or xenogenesis, and fused salt prepares simple repeat and utilized, cost
It is low.
(6) present invention is realized with tungsten coating and connected, and coating coats whole connecting material, connector is had good high temperature
Intensity, there is good corrosion resistance to molten alkali metal and steam.
Brief description of the drawings：
Fig. 1 is junction section SEM
Embodiment:
Example 1：Copper billet body is connected
1：It is 15mm × 10mm × 3mm CuCrZr blocks as working electrode to use size, quantity be 2,15mm ×
10mm × 5mm pure W blocks (purity is 99.95%) carry out plate bonding as to electrode, and two kinds of materials are all provided with the small of Φ 1mm
Hole, facilitates connecting wire.The sample of well cutting is first carried out to an oil removing, with acetone ultrasound 30min, then deionized water is used
Dried up after cleaning.CuCrZr blocks use 240#, 500#, 800#, 1200#, 2000# sand paper polishing, then using 2.5dum gold successively
Hard rock polishing agent is mechanically polished, and obtains smooth flawless surface, and the sample after polishing is cleaned through deionized water, uses Na2CO3=
2g, Na3PO4.12H2O=2g, Na2SiO3=0.5g pours into 500mL beakers, and configuration removes oil solution, is heated to through magnetic stirring apparatus
After 50 DEG C, CuCrZr materials are put into solution, after oil removing 5min, ultrasonic wave washes of absolute alcohol are used after taking out, then spend from
Dried after sub- water ultrasound.W is after 240# polishes, with alcohol ultrasound 30min, then is dried up with after deionized water ultrasound 30min.Connect
Get off and pass through Φ 1mm apertures with Pt, two blocks of CuCrZr alloys are connected, bottom binding one is enclosed with Ni, fixed work is played
With.W material Φ 1mm apertures are passed through with Pt simultaneously, it is standby after pack.
2：According to Na2WO4:WO3=2.5~3.5:0.5~1.5 (mol ratio) weighs proportioning, by load weighted Na2WO4=
791.48g is put into crucible, places into and drying and dewatering is carried out in firing equipment Muffle furnace, and temperature is 450~550 DEG C, and the time is
20~28h.Equally by load weighted WO3=277.44g is put into crucible, places into progress drying in firing equipment Muffle furnace de-
Water, temperature is 150~250 DEG C, and the time is 10~16h.By the Na of drying2WO4And WO3Grind and electricity is obtained after being well mixed and sink
The required salt of product, packs and waits the use of next step.
3：It is alumina crucible 80mm × 80mm × 60mm from crucible, is heated using crucible electrical resistance furnace.First will be mixed
Close uniform Na2WO4=791.48g and WO3=277.44g is put into crucible, then crucible is put into resistance furnace, with 5 DEG C/min
Speed be heated to 900 DEG C, proceed by electro-deposition after insulation 60min.Electro-deposition uses Double-pulse Plating Power Source, current density
For 20mAcm-2(empirical parameter), electrodeposition time is 50h, frequency 1000Z, dutycycle 30%.After electro-deposition terminates, by sample
Product take out from fused salt, are cooled down in atmosphere, are then cleaned successively with 10mol%NaOH solution and deionized water,
Each 30min, to remove the fused salt and impurity that are attached to coating surface.
Example 2：Copper coin material is connected
Example 2 from unlike example 1：When CuCrZr alloy materials area expand 100mm × 100mm sheet materials, now
In first step processing, electrochemical process polishing is finished to.The crucible that next step is used when electroplating is silicon carbide crucible, size
160mm × 160mm × 200mm, now because CuCrZr alloys are larger heavier, is put into before fused salt, it is necessary to connect quartz holder,
(double-deck quartz holder, surrounding is quartz column, is hollow design) is by it is anticipated that the position of connection is fixed on quartz with Ni
On support, while W is also secured on quartz holder, it is advisable with W above CuCrZr alloys.Other techniques are identical with example 1.
Example 3：Bloom body is connected
Example 3 is identical with the process of example 1, simply by connected piece, changes Steel material into.In 1st step, the oil removing of steel is molten
Liquid is：NaOH=5g, Na2CO3=5g, Na3PO4.12H2O=5g, Na2SiO3=1g, OP emulsifying agent 0.5ml, pour into 500ml burnings
In cup.In 3rd step, electroplating temperature is transferred to 850 DEG C and implements plating, the time is 60h.
(1) it is last, in addition it is also necessary to it is noted that listed above is only specific embodiment of the invention, it is clear that the present invention
Above embodiment is not limited to, there can also be many deformations such as：Copper, steel, molybdenum etc. are local with shapes such as block, plate, rod, piece, rings
Or whole plating W coatings, as being protection scope of the present invention for the purpose of connection.One of ordinary skill in the art can be from
All deformations that present disclosure is directly exported or associated, are considered as protection scope of the present invention.
Claims (4)
1. the connection method between a kind of of the same race or different alloys, it is characterised in that by the way of fused salt electro-deposition by two pieces it
Between connect, coating will wrap up and connection alloy；Method processing step is as follows：
(1) pre-connection of connector
After at least two pieces of the same race or different alloys that needs are attached, shape needed for being processed into, matrix is removed using alkali lye
The grease on surface, polishes and smooth flawless surface is obtained after polishing, the alloy after polishing is cleaned through deionized water, surpasses
Sound wave washes of absolute alcohol, then dry after being cleaned with acetone ultrasonic wave；The alloy is entered with Ni according to required connecting portion
Row is fixed, and is used as cathode material；
(2) anode prepares
The grease of matrix surface is removed after pure W plates are processed using alkali lye, successively with 240#, 500#, 800#, 1200#,
2000# sand paper is polished, and then using 2.5dum diamond polishings agent mechanical polishing, smooth flawless surface is obtained, after polishing
Sample cleaned through deionized water, ultrasonic wave washes of absolute alcohol, then dry after being cleaned with acetone ultrasonic wave is standby as anode
With；
(3) preparation of fused salt is electroplated
Respectively to Na2WO4And WO3Drying and dewatering processing is carried out, after being weighed by preset ratio, is ground and well mixed as plating
Fused salt, it is standby；
(4) connection procedure is implemented
The plating fused salt is put into crucible, high temperature resistance furnace is put into, assigned temperature is increased to 5 DEG C/min heating rate
800~900 DEG C, constant temperature 60min makes the abundant melting of fused salt, and composition is uniform；The negative electrode and anode are connected to plating with Pt
On power supply, it is put into the plating fused salt of melting, according to the alloy species of connector, the thickness of required articulamentum, is adjusted to default
Parameter, switches on power, and starts plating；
(5) later processing stage：After electro-deposition terminates, sample is taken out from electrolyte, 10mol%NaOH is respectively adopted water-soluble
Liquid, acetone and deionized water carefully wash the ionic liquid of attachment off, are dried up after washing with cold wind.
2. according to the connection method between the of the same race or different alloys described in claim 1, it is characterised in that described in step (1)
Connected piece is same material or for foreign material, as long as in Na2WO4And WO3In molten salt system, tungsten coating can be electroplated out,
Claim 1 methods described is can be transferred through to be attached.
3. according to the connection method between the of the same race or different alloys described in claim 1, it is characterised in that step (1) described quilt
The cutting profile of connecting material is block or tabular and strip, is selected according to specific actual demand.
4. according to the connection method between the of the same race or different alloys described in claim 1, it is characterised in that step (3) is described,
It will be wrapped up around connector by pure W coatings, coating will be with column crystals growth, and thickness is more than 260 μm, two connectors or three companies
Fitting turns into an integrated connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710357714.1A CN107201537B (en) | 2017-05-19 | 2017-05-19 | A kind of of the same race or different alloys connection methods |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710357714.1A CN107201537B (en) | 2017-05-19 | 2017-05-19 | A kind of of the same race or different alloys connection methods |
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| CN107201537A true CN107201537A (en) | 2017-09-26 |
| CN107201537B CN107201537B (en) | 2019-11-12 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002743A (en) * | 2010-12-01 | 2011-04-06 | 北京科技大学 | Preparation method for electroplating thick tungsten coating on pure copper or copper alloy substrate with molten salt |
| CN106048667A (en) * | 2016-07-19 | 2016-10-26 | 哈尔滨工业大学深圳研究生院 | Connecting method based on electroplating and applied to same metal or dissimilar metal |
-
2017
- 2017-05-19 CN CN201710357714.1A patent/CN107201537B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002743A (en) * | 2010-12-01 | 2011-04-06 | 北京科技大学 | Preparation method for electroplating thick tungsten coating on pure copper or copper alloy substrate with molten salt |
| CN106048667A (en) * | 2016-07-19 | 2016-10-26 | 哈尔滨工业大学深圳研究生院 | Connecting method based on electroplating and applied to same metal or dissimilar metal |
Non-Patent Citations (2)
| Title |
|---|
| 张友寿等: "45号钢、不锈钢、铝合金的电镀连接", 《材料导报》 * |
| 张友寿等: "特种材料的电化学连接技术", 《材料导报》 * |
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| CN107201537B (en) | 2019-11-12 |
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