CN107570839A - A kind of copper tungsten dissimilar metal plate electric arc spot welding method - Google Patents
A kind of copper tungsten dissimilar metal plate electric arc spot welding method Download PDFInfo
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- CN107570839A CN107570839A CN201710969089.6A CN201710969089A CN107570839A CN 107570839 A CN107570839 A CN 107570839A CN 201710969089 A CN201710969089 A CN 201710969089A CN 107570839 A CN107570839 A CN 107570839A
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- tungsten
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Abstract
The invention belongs to dissimilar metal plate weld technical field, and in particular to a kind of copper tungsten dissimilar metal plate electric arc spot welding method.In order to solve that copper coin and tungsten plate are attached using prior art in the tungsten plate operation of rolling, the problem of complex operation and high technological requirement be present, the invention discloses a kind of copper tungsten dissimilar metal plate electric arc spot welding method.The copper tungsten dissimilar metal plate electric arc spot welding method includes, step S1, carries out removing surface to copper coin and tungsten plate respectively；Step S2, overlap joint fixation is carried out to tungsten plate and copper coin, and activating agent is coated on copper coin surface；Step S3, spot welding is carried out to tungsten plate and copper coin using TIG weld method and fixed.It using the copper tungsten dissimilar metal plate electric arc spot welding method of the present invention, can not only realize to being connected between copper coin and tungsten plate, and operation can be simplified and reduce technological requirement.
Description
Technical field
The invention belongs to dissimilar metal plate weld technical field, and in particular to a kind of copper-tungsten dissimilar metal plate electric arc spot welding
Method.
Background technology
Recent years, in the industrial production, in order to which tungsten plate is rolled into ultra thin plate, it is necessary to introduce traction in the operation of rolling
Plate, for providing the tractive force moved forward in the operation of rolling for tungsten plate.Wherein, due to copper coin it is moulding preferably, therefore quilt
The towing plate of the tungsten plate operation of rolling is done in choosing.However, because copper and tungsten are in the physical properties such as fusing point, thermal conductivity and thermal coefficient of expansion
Differ greatly, therefore the difficulty being directly welded to connect to tungsten plate and copper coin is very big.
At present, mainly there are diffusion welding (DW), soldering, active metal casting technique and plasma spray to the interconnection technique of copper-tungsten
Apply.Wherein, using during diffusion welding (DW), it is necessary to add the metallic intermediate layer that can be dissolved each other respectively with copper and tungsten between two kinds of mother metals,
Such as Ni, Cu-Mn alloy, Ti-Ni-Ti alloys, diffusion or interfacial reaction are occurred by metallic intermediate layer and mother metal, form solid solution
Body or interphase, so as to obtain the joint for reaching metallurgical binding after cooling down.Using during soldering, it is necessary to add between two kinds of mother metals
Add fusing point to be below the solder of copper and tungsten, such as Cu-Mn alloys or Ag-Cu alloys, the connection of copper and tungsten is realized by solder, its
In also need to apply certain pressure in brazing process, so as to ensure connection fastness.Using active metal casting technique
When, fine copper is cast in into tungsten surface first, then by electron beam welding, high temperature insostatic pressing (HIP) weldering or soldering, completes the company of copper and tungsten
Connect.During using plasma spraying, depositing materials are heated to fusing using plasma jet or made close to molten state, sprayed coating
The method that protective layer is formed on product surface, wherein the coating of high quality needs to control porosity in coating, oxygen contains in order to obtain
Thermal stress in amount and preparation process.
Due in above-mentioned welding method or need add intermediate layer or need apply pressure or need pair
Porosity, oxygen content and thermal stress are controlled, so in the tungsten plate operation of rolling, if carrying out copper coin and tungsten plate using the above method
Between connection, then the problem of complex operation and high technological requirement be present.
The content of the invention
In order to solve that copper coin and tungsten plate are attached using prior art in the tungsten plate operation of rolling, complex operation be present
With technological requirement it is high the problem of, the present invention proposes a kind of copper-tungsten dissimilar metal plate electric arc spot welding method.The copper-tungsten xenogenesis gold
Belong to plate electric arc spot welding method, specifically include following steps：
Step S1, removing surface is carried out respectively to copper coin to be connected and tungsten plate, it is showed metallic luster；
Step S2, the copper coin for completing removing surface and tungsten plate are subjected to overlap joint fixation, and on the Free Surface of copper coin
Coat one layer of activating agent；
Step S3, using TIG weld method, carry out putting solid welding between copper coin and tungsten plate in the Free Surface side of copper coin
It is fixed.
Preferably, in the step S1, using the surface by the cleaning fluid that the concentrated sulfuric acid, watery hydrochloric acid and water form to tungsten plate
Cleaned；The volume ratio of the concentrated sulfuric acid, watery hydrochloric acid and water is 10 in wherein described cleaning fluid:10:80.
It is further preferred that in the step S1, the surface of tungsten plate is carried out by the cleaning fluid first repeatedly clear
Wash, scavenging period 10min, then the surface of tungsten plate is finally rinsed using acetone.
Preferably, in the step S1, the surface of copper coin is polished first by coarse sandpaper, removes the oxygen on surface
Change film, the dilute sulfuric acid that then concentration is 10% is cleaned repeatedly to the surface of copper coin, while by clear water to copper coin
Surface is rinsed, and finally the surface of copper coin is finally rinsed using acetone.
Preferably, in the step S2, the activating agent selects SiO2。
Preferably, in the step S3, TIG weld parameter is：Between tungsten electrode and copper coin surface distance be 2mm~
4mm, welding current value are 140A~170A, and inert gas selects argon gas, and gas flow is 10~15L/min, and the spot welding time is
3s~5s.
It is further preferred that in the step S3, TIG weld parameter is：Distance is between tungsten electrode and copper coin surface
3mm, welding current value are 140A, and inert gas selects argon gas, gas flow 10L/min, and the spot welding time is 4s.
When connecing method using the automatic activating-tungsten inert gas welding of the present invention and be subjected to, have the advantages that：
1st, in the present invention, copper coin and the progress spot welding of tungsten plate are fixed by carrying out activating flux TIG welding in copper coin side
Connection, so as to realize to being quickly fixedly connected between copper coin and tungsten plate.So, not only eliminate to use and spread in the prior art
When weldering or soldering, the padding to filler is domestic so as to simplify welding operation, and reduces and poured using active metal
Casting technology and during using plasma spraying, the requirement to welding procedure, that is, eliminate requirement in welding process to pressure and
Requirement to porosity, oxygen content and thermal stress, so as to simplify operating procedure, improve operating efficiency.
The match settings of welding parameter when the 2nd, in the present invention, by carrying out active TIG spot-weldeds to tungsten plate and copper coin,
Such as by being selected to welding current value, tungsten plate is connected the pad obtained in welding point with copper coin and be provided with very
Good tensile strength, and the integrated connection fastness of welding point is ensure that, so as to meet copper coin in the tungsten plate operation of rolling
As requirement of the towing plate to tractive force.
Brief description of the drawings
Fig. 1 is the SEM image that copper tungsten joint is obtained in embodiment 1；
Fig. 2 is the SEM image that copper tungsten joint is obtained in embodiment 2；
Fig. 3 is the SEM image that copper tungsten joint is obtained in comparative example 1；
Fig. 4 is the SEM image that copper tungsten joint is obtained in comparative example 2；
Fig. 5 is the photo of copper tungsten joint after completing to weld in comparative example 3；
Fig. 6 is the photo that copper tungsten joint fracture position in tensile test is obtained in embodiment 1；
Fig. 7 is the photo that copper tungsten joint fracture position in tensile test is obtained in embodiment 2；
Fig. 8 is the photo that copper tungsten joint fracture position in tensile test is obtained in comparative example 1；
Fig. 9 is the photo that copper tungsten joint fracture position in tensile test is obtained in comparative example 2.
Embodiment
Technical scheme is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Using copper-tungsten dissimilar metal plate electric arc spot welding method of the present invention, the tool being fixedly connected to copper coin and tungsten plate
Body step is：
Step S1, removing surface is carried out respectively to copper coin to be connected and tungsten plate, it is showed metallic luster.
Preferably, in the present invention, the surface of tungsten plate is carried out using by the cleaning fluid that the concentrated sulfuric acid, watery hydrochloric acid and water form
Cleaning.Wherein, the concentration of the concentrated sulfuric acid is 95%-97% in cleaning fluid, and the concentration of watery hydrochloric acid is 37%-38%, and the concentrated sulfuric acid,
The volume ratio of watery hydrochloric acid and water is 10:10:80.
When carrying out removing surface to tungsten plate using cleaning fluid, the surface of tungsten plate is carried out repeatedly first by above-mentioned cleaning fluid
Cleaning, scavenging period 10min, oxide and its impurity to tungsten plate surface are cleared up.Then using acetone again to tungsten plate
Surface carry out final flushing, remove and remain remaining cleaning fluid.
Preferably, in the present invention, when being cleaned to copper coin, mechanical grinding is carried out to the surface of copper coin first, removed
The oxide-film on copper coin surface.Copper coin surface is polished repeatedly for example with coarse sandpaper, so is ensureing to remove oxide film dissolving
In the case of, the influence to copper plate thickness size and surface form and position tolerance can be reduced.Then concentration is 10% dilute sulfuric acid
The surface of copper coin is cleaned repeatedly, while the surface of copper coin is rinsed by clear water, is completed to copper coin remained on surface
The removal of oxide and other impurities.Finally the surface of copper coin is finally rinsed using acetone, removal remains in copper coin table
The dilute sulfuric acid in face.
Step S2, the copper coin for completing removing surface and tungsten plate are subjected to overlap joint fixation, and copper coin is placed upward, in copper
One layer of activating agent is coated on the Free Surface of plate.
Preferably, in the present invention, activating agent selects SiO2, and coat one on the Free Surface of copper coin by hairbrush
Layer active agent layer in uniform thickness.Wherein, the thickness of active agent coating is advisable with hiding the metallic luster on copper coin surface just.
In addition, before carrying out the overlap joint between copper coin and tungsten plate and fixing, it is ensured that surface is mutually overlapped between copper coin and tungsten plate
Flatness, ensure to complete between copper coin and tungsten plate overlap joint it is fixed after, full contact state be between both contact surfaces, with guarantor
The fastness connected between card copper coin and tungsten plate.
Step S3, using TIG weld method, carry out putting solid welding between copper coin and tungsten plate in the Free Surface side of copper coin
It is fixed.
Preferably, in the present invention, welding parameter during spot-welded is carried out to copper coin and tungsten plate using TIG weld method
For：Distance is 2mm~4mm between tungsten electrode and copper coin surface, and welding current value is 140A~170A, and inert gas selects argon
Gas, gas flow are 10~15L/min, and the spot welding time is 3s~5s.
Embodiment 1, using the present invention copper-tungsten dissimilar metal plate electric arc spot welding method, to thickness be 1mm fine copper plate and
The pure tungsten plate that thickness is 0.5mm, which carries out overlapped points solid welding, to be determined.
Wherein, the trade mark of copper coin is T1, and appearance and size is 100mm × 25mm；The trade mark of tungsten plate is W1, and appearance and size is
100mm×25mm.From by the concentrated sulfuric acid, watery hydrochloric acid and water by volume 10:10:The cleaning fluid and third that 80 proportional arrangement forms
Ketone is cleared up tungsten plate surface；Copper coin surface is cleared up from coarse sandpaper, watery hydrochloric acid, clear water and acetone.Copper coin with
Amount of lap between tungsten plate is 25mm, and activating agent selects SiO2And coating surface product is 12 × 12mm2.TIG weld parameter is,
Welding current value is 140A, and the distance between the tungsten electrode of welding gun and copper coin surface are 3mm, and inert gas selects argon gas, indifferent gas
The throughput of body is 10L/min, and the spot welding time is 4s.Complete welding and in atmosphere after natural cooling, obtain as shown in Figure 1
The SEM image of copper tungsten joint.
Embodiment 2, use the pure tungsten that method same as Example 1 is 0.5mm for 1mm fine copper plate and thickness to thickness
Plate, which carries out overlapped points solid welding, to be determined.It is differed only in, and welding current value is 170A, and after the completion of welding, is obtained as shown in Figure 2
Copper tungsten joint SEM image.
Comparative example 1, use the pure tungsten that method same as Example 1 is 0.5mm for 1mm fine copper plate and thickness to thickness
Plate, which carries out overlapped points solid welding, to be determined.It is differed only in, and activating agent is not coated on copper coin surface, and after the completion of welding, is obtained
The SEM image of copper tungsten joint as shown in Figure 3.
Comparative example 2, use the pure tungsten that method same as Example 1 is 0.5mm for 1mm fine copper plate and thickness to thickness
Plate, which carries out overlapped points solid welding, to be determined.It is differed only in, and welding current value is 110A, and after the completion of welding, is obtained as shown in Figure 4
Copper tungsten joint SEM image.
Comparative example 3, use the pure tungsten for being 0.5mm for 1mm fine copper plate and thickness to thickness with the identical method of comparative example 2
Plate, which carries out overlapped points solid welding, to be determined.It is differed only in, and activating agent is not coated on copper coin surface.With reference to shown in Fig. 5, welding is completed
Afterwards, it is not carried out connecting at all between copper coin and tungsten plate, i.e., in the case of low current (110A), at all can not by activating agent
Realize being welded to connect between copper coin and tungsten plate.
Next, carry out pull test to obtaining copper tungsten joint in above-described embodiment and comparative example.Wherein, to break copper tungsten
Joint is standard, records the bonding strength of each copper tungsten joint.
Pull test is carried out to obtaining copper tungsten joint in embodiment 1, obtains copper tungsten joint breaking position as shown in Figure 6
Photo, and value of thrust during copper tungsten joint breaking is 2.86KN.
Pull test is carried out to obtaining copper tungsten joint in embodiment 2, obtains copper tungsten joint breaking position as shown in Figure 7
Photo, and value of thrust during copper tungsten joint breaking is 2.48KN.
Pull test is carried out to obtaining copper tungsten joint in comparative example 1, obtains copper tungsten joint breaking position as shown in Figure 8
Photo, and value of thrust during copper tungsten joint breaking is 0.95KN.
Pull test is carried out to obtaining copper tungsten joint in comparative example 2, obtains copper tungsten joint breaking position as shown in Figure 9
Photo, and value of thrust during copper tungsten joint breaking is 0.87KN.
It is identical with the copper tungsten joint performance that is obtained in embodiment 2 in embodiment 1 with reference to shown in Fig. 1 and Fig. 2, not only in copper
The junction at tungsten interface all has preferable compactness and low defect.With reference to shown in Fig. 6 and Fig. 7, embodiment 1 and embodiment 2
Position occurs for the middle fracture for obtaining copper tungsten joint all in the tungsten plate side at pad, illustrates that embodiment 1 and embodiment 2 obtain
The pad of copper tungsten joint all has preferable connectivity robustness.
Meanwhile the tensile fracture value of copper tungsten joint is 2.87KN in embodiment 1, copper tungsten joint is disconnected in example 2
Value of thrust 2.48KN is split, both tensile fracture values have reached more than 2KN, and the copper coin and thickness for being 1.0mm for thickness are
There is very high tensile strength for 0.5mm tungsten plate.Therefore, using embodiment 1 and the method for embodiment 2, can obtain
The good copper tungsten joint of pad connectivity robustness, and the integrated connection fastness of copper tungsten joint is also fine, has good
Tensile property.
Shown in comparison diagram 1 and Fig. 3, in the copper tungsten joint obtained in embodiment 1, the junction at copper tungsten interface has preferable
Compactness and low defect；In the copper tungsten joint obtained in comparative example 1, there is more lack in the junction at copper tungsten interface
Fall into.Illustrate in SiO2Under the booster action of activating agent, TIG electric weldings are carried out to tungsten plate and copper coin, more preferable weldering can be obtained
Connect quality.
The fracture of copper tungsten joint is obtained shown in comparison diagram 6 and Fig. 8, in embodiment 1, and position occurs is at pad
Tungsten plate side, and it is directly at pad that position, which occurs, for the fracture that copper tungsten joint is obtained in comparative example 1, i.e., embodiment 1 obtains copper tungsten
Pad in joint has good connectivity robustness.Meanwhile the tensile fracture value of copper tungsten joint is in embodiment 1
2.87KN, it is 3 times of copper tungsten joint breaking value of thrust 0.95KN in comparative example 1.Therefore, the copper obtained using the method for embodiment 1
Tungsten joint not only has good pad connectivity robustness, and the integrated connection fastness of copper tungsten joint is also very high.
Shown in comparison diagram 1 and Fig. 4, although obtaining the copper tungsten interface of copper tungsten joint in comparative example 2 with obtaining copper in embodiment 1
The copper tungsten interface of tungsten joint all has preferable compactness and low defect in junction, but copper tungsten joint in comparative example 2
Tensile fracture value there was only 0.87KN, the tensile fracture value 2.87KN of copper tungsten joint far smaller than in embodiment 1, illustrate using pair
The integrated connection fastness for the copper tungsten joint that the method for ratio 2 obtains is very poor.
In addition, with reference to shown in Fig. 9, in comparative example 2 fracture of copper tungsten joint occur directly in weld locations, i.e. pad
Fastness it is very low.Therefore, when the welding current value (110A) used in comparative example 2 is less than the welding electricity used in embodiment 1
During flow valuve (140A), the connectivity robustness of pad in copper tungsten joint is obtained by TIG spot-weldeds to be reduced, and overall company
Fastness is connect also to be greatly lowered.
Claims (7)
1. a kind of copper-tungsten dissimilar metal plate electric arc spot welding method, it is characterised in that the welding method specifically includes following steps：
Step S1, removing surface is carried out respectively to copper coin to be connected and tungsten plate, it is showed metallic luster；
Step S2, the copper coin for completing removing surface and tungsten plate are subjected to overlap joint fixation, and coated on the Free Surface of copper coin
One layer of activating agent；
Step S3, using TIG weld method, spot welding between copper coin and tungsten plate is carried out in the Free Surface side of copper coin and is fixed.
2. copper according to claim 1-tungsten dissimilar metal plate electric arc spot welding method, it is characterised in that in the step S1
In, the surface of tungsten plate is cleaned using by the cleaning fluid that the concentrated sulfuric acid, watery hydrochloric acid and water form；It is dense in wherein described cleaning fluid
The volume ratio of sulfuric acid, watery hydrochloric acid and water is 10:10:80.
3. copper according to claim 2-tungsten dissimilar metal plate electric arc spot welding method, it is characterised in that in the step S1
In, the surface of tungsten plate is cleaned repeatedly by the cleaning fluid first, scavenging period 10min, then using acetone pair
The surface of tungsten plate is finally rinsed.
4. copper according to claim 1-tungsten dissimilar metal plate electric arc spot welding method, it is characterised in that in the step S1
In, the surface of copper coin is polished first by coarse sandpaper, removes the oxide-film on surface, then concentration be 10% it is dilute
Sulfuric acid is cleaned repeatedly to the surface of copper coin, while the surface of copper coin is rinsed by clear water, finally using acetone pair
The surface of copper coin is finally rinsed.
5. copper-tungsten dissimilar metal plate electric arc spot welding method according to any one in claim 1-4, it is characterised in that
In the step S2, the activating agent selects SiO2。
6. copper-tungsten dissimilar metal plate electric arc spot welding method according to any one in claim 1-4, it is characterised in that
In the step S3, TIG weld parameter is：Distance is 2mm~4mm between tungsten electrode and copper coin surface, and welding current value is
140A~170A, inert gas select argon gas, and gas flow is 10~15L/min, and the spot welding time is 3s~5s.
7. copper according to claim 6-tungsten dissimilar metal plate electric arc spot welding method, it is characterised in that in the step S3
In, TIG weld parameter is：Distance is 3mm between tungsten electrode and copper coin surface, and welding current value is 140A, and inert gas is selected
Argon gas, gas flow 10L/min, spot welding time are 4s.
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| CN1210048A (en) * | 1997-09-04 | 1999-03-10 | 国营五二三厂 | Argon arc welding spot welding method for cadmium plate with thickness of 0.5 mm |
| US20070181550A1 (en) * | 2006-02-08 | 2007-08-09 | Siemens Power Generation, Inc. | A-TIG welding of copper alloys for generator components |
| CN101745709A (en) * | 2009-12-21 | 2010-06-23 | 哈尔滨工业大学 | Assistant coating TIG fusing-brazing method suitable for aluminum/steel dissimilar alloy butting |
| CN103128429A (en) * | 2013-03-08 | 2013-06-05 | 兰州理工大学 | Titanium/copper dissimilar metal and cold metal transitional connecting method |
| CN103521898A (en) * | 2013-10-08 | 2014-01-22 | 俞亮亮 | Unequal-diameter welding butt joint aluminum alloy pipe |
| CN103521897A (en) * | 2013-09-27 | 2014-01-22 | 兰州理工大学 | Method for butt joint of stainless steel plate with thickness of 12mm |
| CN104400194A (en) * | 2014-10-24 | 2015-03-11 | 山东省科学院新材料研究所 | Active welding method for dissimilar magnesium alloy plates |
-
2017
- 2017-10-18 CN CN201710969089.6A patent/CN107570839B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210048A (en) * | 1997-09-04 | 1999-03-10 | 国营五二三厂 | Argon arc welding spot welding method for cadmium plate with thickness of 0.5 mm |
| US20070181550A1 (en) * | 2006-02-08 | 2007-08-09 | Siemens Power Generation, Inc. | A-TIG welding of copper alloys for generator components |
| CN101745709A (en) * | 2009-12-21 | 2010-06-23 | 哈尔滨工业大学 | Assistant coating TIG fusing-brazing method suitable for aluminum/steel dissimilar alloy butting |
| CN103128429A (en) * | 2013-03-08 | 2013-06-05 | 兰州理工大学 | Titanium/copper dissimilar metal and cold metal transitional connecting method |
| CN103521897A (en) * | 2013-09-27 | 2014-01-22 | 兰州理工大学 | Method for butt joint of stainless steel plate with thickness of 12mm |
| CN103521898A (en) * | 2013-10-08 | 2014-01-22 | 俞亮亮 | Unequal-diameter welding butt joint aluminum alloy pipe |
| CN104400194A (en) * | 2014-10-24 | 2015-03-11 | 山东省科学院新材料研究所 | Active welding method for dissimilar magnesium alloy plates |
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