CN100445016C - Copper alloy electrode for resistance weld and its manufacturing method - Google Patents
Copper alloy electrode for resistance weld and its manufacturing method Download PDFInfo
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- CN100445016C CN100445016C CNB2005101227812A CN200510122781A CN100445016C CN 100445016 C CN100445016 C CN 100445016C CN B2005101227812 A CNB2005101227812 A CN B2005101227812A CN 200510122781 A CN200510122781 A CN 200510122781A CN 100445016 C CN100445016 C CN 100445016C
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Abstract
The present invention relates to a resistance welding copper alloy electrode and a manufacture method. In the resistance welding copper alloy electrode provided by the present invention, at least three layers of materials are distributed on the base body of the end part of the electrode, a metal alloy layer contacts the base body, a metal alloy composite material layer is arranged in the middle of the base body, and a metal alloy layer is arranged on the outermost surface. The manufacture method for the resistance welding copper alloy electrode, which is provided by the present invention, at least uses the following manufacture steps: in the first step, the metal alloy layer is plated on the surface of the end part of the electrode by using an electric cremation sediment method; in the second step, the metal alloy composite material layer is plated on the plated metal alloy layer by using the electric cremation sediment method; in the third step, the metal alloy layer is plated on the metal alloy composite material layer by using the electric cremation sediment method. Compared with the prior art, the service life of the resistance welding copper alloy electrode provided by the present invention is obviously extended; the provided manufacture method for the resistance welding copper alloy electrode uses simple mature technology, and three layers of uniform compact coats are plated on the end part of the electrode by using a stepwise electric cremation sediment method, so the high operational reliability and the long service life of the resistance welding copper alloy electrode are ensured.
Description
(1) technical field
The present invention relates to a kind of copper alloy electrode for resistance weld and manufacture method thereof.
(2) background technology
Because zinc-plated and zinc-plated aluminum steel plate (comprising plating, hot dip and evaporation plating) has fabulous decay resistance, in recent years at automobile, household electrical appliances, fields such as building have obtained application more and more widely.Especially automobile industry is used galvanized sheet to produce parts such as vehicle body in a large number and is adopted electric resistance welding to weld.But during the galvanized steel plain sheet electric resistance welding, obviously shorten during than welding non-coating steel plate the service life of resistance welding electrode (comprising electrode tip, electrode cap, battery lead plate and electrode wheel).During welding non-coating steel plate, the service life of resistance welding electrode (as the Cu-Cr-Zr alloy electrode) is usually at 10000 more than the solder joint, and during the welding galvanized steel plain sheet, service life of Cu-Cr-Zr alloy electrode even less than 250 solder joints.Except that generating heat in welding process and be out of shape under the high pressure effect, electrode causes the increase of electrode tip diameter, another main cause that significantly descend electrode life during the welding galvanized sheet is, zinc coat fusing when welding, adhere to electrode tip, and with copper alloy electrode generation alloying, form hard and crisp layer of brass.The poorly conductive of layer of brass causes electrode seriously to generate heat.Simultaneously, layer of brass very easily ftractures under welding pressure, and in welding process subsequently, be glued to surface of steel plate from electrode tip, the electrode tip diameter is increased rapidly, thereby current density is descended, cause the resistance heating deficiency between steel plate to be welded, can not form the weld nugget size that satisfies standard, cause electrode failure.When steel plate coating contained aluminium, aluminium and copper alloying formed low-melting alloy, make electrode failure faster.
Behind the electrode failure, the electrode that must more renew or carry out reconditioning.Replacing and reconditioning electrode have increased production cost, also greatly reduce the production efficiency of automatic welding production line simultaneously.For reducing the number of times that electrode is refaced, reduce welding cost, enhance productivity, people expect to develop a kind of copper alloy electrode material that is applicable to the galvanized steel plain sheet electric resistance welding always for a long time.For example, alumina dispersion-strenghtened copper alloy electrode has better elevated temperature strength, and when welding, can form one deck oxygen enrichment aluminium lamination on the electrode tip surface, thereby reduced the bonding between electrode and the zinc, helped to suppress the alloying of zinc and copper alloy, alumina dispersion-strenghtened copper alloy electrode service life surpasses the Cu-Cr-Zr alloy electrode when welding galvanized sheet according to reports, but the price of alumina dispersion-strenghtened copper alloy electrode is normally more than the twice of Cu-Cr-Zr alloy electrode.In addition, the tellurium copper alloy has reduced bonding between electrode and the zinc by what, also helps to improve electrode life.
On the other hand, existing abroad according to reports people adopts the method for electricity cremate deposition to plate the layer of metal pottery as TiC or TiB at electrode tip
2, can improve the use of electrode and receive a mandate.It is little that getting well of selecting that the electric spark method deposits is in the hot input quantity of what, and the copper alloy matrix temperature is low during deposition, can not cause copper alloy softening.But, studies show that, work as TiB
2Sneak into coating Deng the cermet electric spark deposition to the fusing of copper alloy electrode when surface part copper,, thereby reduced ceramic-metallic toughness concerning the what cermet because copper is not good binding agent.On the other hand, copper alloy and ceramic-metallic thermal coefficient of expansion differ greatly, and cause coating cracking also to separate with copper alloy matrix during cooling under the effect of tensile stress, have obviously reduced the ability of coating isolation zinc.In addition, the coating of cracking is easy to be stained with glue when resistance welded, and when being soldered to 400 solder joint left and right sides, the coating on surface almost all comes off.Therefore, to coated electrode, anxious following two problems to be solved: how (1) guarantees that coating is fine and close continuously, and does not ftracture in welding process; (2) how to reduce bonding between coating and the zinc to reduce the loss of coating.
(3) summary of the invention
One of purpose of the present invention just provides a kind of copper alloy electrode for resistance weld of long working life.
Another object of the present invention just provides a kind of copper alloy electrode for resistance weld manufacture method, adopts the electric cremate intermediate processing of substep to make electrode tip plate three layers of even compact coating at least, guarantees the high workload life-span of the copper alloy electrode for resistance weld of manufacturing.
Above-mentioned purpose of the present invention realizes by following technical measures:
A kind of copper alloy electrode for resistance weld is furnished with trilaminate material on the said electrode tip matrix at least, and contacted with matrix is metal alloy layer, and the centre is the metal alloy composite layer, and outmost surface is a metal alloy layer.
Said and the contacted metal alloy layer thickness of matrix is the 10-40 micron, and said metal alloy composite layer thickness is the 20-50 micron.
Contacted and metal alloy layer matrix outmost surface of said and matrix is a nickel, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten, cobalt.
The percentage by weight that other alloying element in the said metal alloy accounts for metal alloy is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, cobalt 0-40%.
Contacted and metal alloy layer matrix outmost surface of said and matrix is a cobalt, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten, nickel.
The percentage by weight that other alloying element in the said metal alloy accounts for metal alloy is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, nickel 0-40%.
Said metal alloy composite layer strengthens body by metal alloy, cermet and self-lubricating solid agent mixing is formed.
Alloy base in the said metal alloy composite is nickel or cobalt, and other alloying element in the alloy comprises boron, chromium, molybdenum, tungsten.
Cermet in the said metal alloy composite strengthens body by tungsten carbide (WC), titanium carbide (TiC), zirconium boride (ZrB
2), titanium boride (TiB
2), titanium nitride (TiN), molybdenum silicide (MoSi
2) boron carbide (B
4C) and a kind of material in the CNT or multiple material form, the diameter that said cermet strengthens the particle of body or fiber is 10 nanometers-10 micron, the percent by volume that accounts for the metal alloy composite is 30-60%.
In the said metal alloy composite the self-lubricating solid agent form by a kind of material in graphite, carbon fiber and the CNT or multiple material; the particle of said self-lubricating solid agent or the diameter of fiber are 10 nanometers-10 micron, and the percent by volume that accounts for the metal alloy composite is 5%-20%.The layer of metal alloy-layer that said outmost surface metal alloy layer has one deck to adopt chemical vapour deposition technique or physical vaporous deposition or high speed cold gas stream spraying WS2 method to form outward again.
A kind of copper alloy electrode for resistance weld manufacture method, adopt following manufacturing step at least: first step, adopt the method for electricity cremate deposition to plate metal alloy layer on the electrode tip surface; Second step adopts the method for electricity cremate deposition to plate metal alloy composite materials layer on the above-mentioned metal alloy layer that plates; Third step adopts the method for electricity cremate deposition to plate metal alloy layer on above-mentioned metal alloy composite layer.
In said first step and the third step, the metal alloy layer matrix is a nickel, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten, cobalt.
The percentage by weight that other alloying element in the said metal alloy accounts for metal alloy is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, cobalt 0-40%.
In said first step and the third step, the metal alloy layer matrix is a cobalt, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten, nickel.
The percentage by weight that other alloying element in the said metal alloy accounts for metal alloy is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, nickel 0-40%.
In said first step and the third step, at first, be prepared into the metal alloy rod by powder metallurgy method, diameter is the 1-5 millimeter, and then plating metal alloy layer with the method for electric spark deposition. the metal alloy rod is as anode in the deposition process, the copper alloy electrode matrix is as negative electrode, and anode material melts in the spark discharge process and is delivered to cathode surface and forms metal alloy layer.
In said second step, the metal alloy composite layer strengthens body by metal alloy, cermet and self-lubricating solid agent mixing is formed.
Alloy base in the said metal alloy composite is nickel or cobalt, and other alloying element in the alloy comprises boron, chromium, molybdenum, tungsten.
Cermet in the said metal alloy composite strengthens body by tungsten carbide (WC), titanium carbide (TiC), zirconium boride (ZrB
2), titanium boride (TiB
2), titanium nitride (TiN), molybdenum silicide (MoSi
2) boron carbide (B
4C) and a kind of material in the CNT or multiple material form, the diameter that said cermet strengthens the particle of body or fiber is 10 nanometers-10 micron, the percent by volume that accounts for the metal alloy composite is 30-60%.
Self-lubricating solid agent in the said metal alloy composite is made up of a kind of material in graphite, carbon fiber and the CNT or multiple material; the particle of said self-lubricating solid agent or the diameter of fiber are 10 nanometers-10 micron, and the percent by volume that accounts for the metal alloy composite is 5%-20%.In said second step, the electric spark deposition technological parameter is voltage 20-40 volt, and electric capacity 50-1000 microfarad, atmosphere are air or argon gas, time 30-75 second, thickness 30-50 micron.
In said second step, at first, be prepared into the metal alloy composite stick by powder metallurgy method, diameter is the 2-5 millimeter, and then plating metal alloy composite materials layer with the method for electric spark deposition. the metal alloy composite stick is as anode in the deposition process, the copper alloy electrode matrix is as negative electrode, and anode material melts in the spark discharge process and is delivered to cathode surface and forms the metal alloy composite layer.
The 4th step is poly-, the layer of metal alloy-layer that adopts chemical vapour deposition technique or physical vaporous deposition or high speed cold gas stream spraying WS2 method to form on above-mentioned metal alloy layer.
Compared with prior art, copper alloy electrode for resistance weld provided by the invention greatly reduces the bonding phenomenon of electrode and workpiece, has reduced coefficient of friction, and the working life of electrode is obviously improved; The copper alloy electrode for resistance weld manufacture method is provided, adopted the technology of simple maturation, the substep electricity cremate intermediate processing that adopts makes electrode tip plate the coating of three layers of even compact, guarantees the high workload reliability and the long service live of the copper alloy electrode for resistance weld made.
(4) description of drawings
Accompanying drawing 1 is a copper alloy electrode for resistance weld structural representation provided by the invention.
(5) specific embodiment
Copper alloy electrode for resistance weld provided by the present invention is distributed with trilaminate material earlier on the electrode tip matrix 1, contacted with matrix is metal alloy layer 2, and the centre is a metal alloy composite layer 3, and outmost surface is a metal alloy layer 4.With the contacted metal alloy layer thickness of matrix be the 10-40 micron, middle metal alloy composite layer thickness is the 20-50 micron.For preventing the bonding of electrode better, one deck compact metal alloy-layer that adopts chemical vapour deposition technique or physical vaporous deposition or high speed cold gas stream spraying WS2 method to form outside the outmost surface metal alloy layer again, the thickness of this metal alloy layer is about 0.5 micron.
The composition of above-mentioned three first layers material: and metal alloy layer matrix outmost surface contacted with matrix is nickel or cobalt, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten.Adopt when Ni-based, percentage by weight is boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, cobalt 0-40%; When adopting cobalt-based, percentage by weight is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, nickel 0-40%.Middle metal alloy composite layer strengthens body by metal alloy, cermet and self-lubricating solid agent mixing is formed; Alloy base is nickel or cobalt, and other alloying element in the alloy comprises boron, chromium, molybdenum, tungsten; Cermet strengthens body by tungsten carbide (WC), titanium carbide (TiC), zirconium boride (ZrB
2), titanium boride (TiB
2), titanium nitride (TiN), molybdenum silicide (MoSi
2) boron carbide (B
1C) and a kind of material in the CNT or multiple material form, the diameter that cermet strengthens the particle of body or fiber is 10 nanometers-10 micron, the percent by volume that accounts for the metal alloy composite is 30-60%; The self-lubricating solid agent is made up of a kind of material in graphite, carbon fiber and the CNT or multiple material, and the particle of self-lubricating solid agent or the diameter of fiber are 10 nanometers-10 micron, and the percent by volume that accounts for the metal alloy composite is 5%-20%.
Copper alloy electrode for resistance weld manufacture method provided by the present invention is as follows:
1. the preparation method of ground floor metal alloy layer
1.1 the composition of metal alloy: alloy base is selected nickel or cobalt, this is because nickel and cobalt all are the ceramic-metallic bonds well agent of preparation, and with copper between combine well, its resistance only is respectively 4 times and 3.7 times of fine copper, because coating is very thin, does not influence the electric resistance welding process fully.In addition, little by the diffusion coefficient of what zinc in nickel and cobalt alloy, so can also play the effect of good isolation zinc.Alloying element in the alloy comprises: boron (B), chromium (Cr), molybdenum (Mo), tungsten (W), nickel (Ni) (when cobalt is matrix), cobalt (Co) (when nickel is matrix); Alloying element plays the effect that strengthens matrix strength and hardness.The content of alloying element (percentage by weight) is as shown in the table in the metal alloy:
| Metal alloy | Boron (B) | Chromium (Cr) | Molybdenum (Mo) | Tungsten (W) | Cobalt (Co) | Nickel (Ni) |
| Nickel-base alloy | 0-5 | 1-20 | 5-10 | 2-6 | 0-40 | |
| Cobalt-base alloys | 0-5 | 1-20 | 5-10 | 2-6 | 0-40 |
1.2 the preparation method of metal alloy layer: at first, be prepared into the metal alloy rod by mentioned component with powder metallurgy method, diameter is the 1-5 millimeter.And then preparing metal alloy layer with the method for electric spark deposition. the metal alloy rod is as anode in the deposition process, copper alloy electrode is as negative electrode, and anode material (plasma heating) in the spark discharge process melts and is delivered to cathode surface and forms metal alloy coating; The ground floor metal alloy layer can significantly reduce the mixed volume of copper in the second layer metal based composites as separation layer, also helps stoping zinc and the alloying of copper alloy electrode when welding simultaneously.Shown in the metal alloy electric spark deposition technological parameter following table:
| Voltage (volt) | Electric capacity (microfarad) | Atmosphere | Time (second) | Thickness (micron) |
| 3-7 | 50-1000 | Argon gas | 2-5 | 10-40 |
2. the preparation method of second layer metal alloy composite materials
2.1. the composition of composite is Ji Group one-tenth:
Composite is to add in above-mentioned metal alloy that cermet strengthens body and the self-lubricating solid agent is made.Strengthen body and can select to have the cermet particles and the fiber of better electric conductivity.Add pottery enhancing body and can further improve the high temperature hardness and the elevated temperature strength of coating, and reduce the bonding of coating and zinc simultaneously.Strengthening body comprises: tungsten carbide (WC), titanium carbide (TiC), zirconium boride (ZrB
2), titanium boride (TiB
2), titanium nitride (TiN), molybdenum silicide (MoSi
2) boron carbide (B
4C) and CNT; The diameter that strengthens body particle or fiber is 10 nanometers-10 micron.It can be a kind of that the cermet that adds strengthens body, also can be multiple; Total volume fraction is 30-60%; Add a certain amount of self-lubricating solid agent can reduce greatly between coating and the zinc be stained with sticking.The self-lubricating solid agent comprises graphite, carbon fiber and CNT.The diameter of self-lubricating solid agent particle or fiber is 10 nanometers-10 micron.The self-lubricating solid agent that adds can be a kind of, also can be multiple; Total volume fraction is 5%-20%;
2.2 the preparation method of composite layer
Composite coating adopts the method preparation of electric spark deposition.At first, be prepared into composite stick, diameter 2-5 millimeter with powder metallurgy method; And then prepare composite coating with the method for electric spark deposition.Composite stick is as anode in the deposition process, and the copper alloy electrode that is coated with metal alloy layer is as negative electrode, and anode material melts in the spark discharge process and is delivered to cathode surface and forms composite coating; Composite electric spark deposition technological parameter is as shown in the table:
| Voltage (volt) | Electric capacity (microfarad) | Atmosphere | Time (second) | Thickness (micron) |
| 20-40 | 50-1000 | Air or argon gas | 30-75 | 30-50 |
3. the preparation method of three-layer metal alloy-layer
3.1 the composition of three-layer metal alloy-layer is identical with the composition of ground floor metal alloy layer.
3.2 the preparation method of the three-layer metal alloy coat also preparation method with the ground floor metal alloy coating is identical: by the metallic matrix composite coating hardness height of what electric spark deposition, toughness is low, under the residual-tensile stress effect, still be difficult to avoid fully cracking sometimes, cause that motlten metal zinc penetrates coating from these crackles in welding process, so on the second layer metal matrix composite coating, deposit the face crack that the three-layer metal alloy coat can thoroughly be eliminated coating again.
4. the preparation method of the 4th layer of metal alloy layer
This layer metal alloy layer is for the coefficient of friction that further reduces electrode tip, prevents that bonding phenomenon from taking, be a kind of of most preferred embodiment.This metal alloy layer can adopt chemical vapour deposition technique or physical vaporous deposition or high speed cold gas stream spraying WS2 method to form, and the thickness after the formation is about 0.5 micron.
5, result of the test
Under similarity condition, there are the contrast soldering test of coated electrode and no coated electrode, result to show that be more than 2 times of no coated electrode service life the service life that coated electrode is arranged of adopting aforesaid way formation at least according to the U.S. ' resistance welding electrode test method in service life ' (AWS D8.9-97).Resistance welded experimental condition and result are as shown in the table:
| Welding current (ampere) | Electrode pressure (thousand newton) | Weld interval (cycle) | Hold time (cycle) | Speed of welding (solder joint/minute) | Current (rise/minute) | Life-span (solder joint) | |
| No coated electrode | 9200 | 1.94 | 11 | 5 | 25 | 2 | ＜600 |
| Coated electrode is arranged | 9200 | 1.94 | 11 | 5 | 25 | 2 | ＞1200 |
Claims (20)
1, a kind of copper alloy electrode for resistance weld, it is characterized in that: be furnished with trilaminate material at least on the said electrode tip matrix, contacted with matrix is metal alloy layer, the centre is the metal alloy composite layer, outmost surface is a metal alloy layer, and said metal alloy composite layer strengthens body by metal alloy, cermet and self-lubricating solid agent mixing is formed.
2, according to the said copper alloy electrode for resistance weld of claim 1, it is characterized in that: the said and contacted metal alloy layer thickness of matrix is the 10-40 micron, and said metal alloy composite layer thickness is the 20-50 micron.
3, according to the said copper alloy electrode for resistance weld of claim 1, it is characterized by: contacted and metal alloy layer matrix outmost surface of said and matrix is a nickel, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten, cobalt.
4, according to the said copper alloy electrode for resistance weld of claim 3, it is characterized by: the percentage by weight that other alloying element in the said metal alloy accounts for metal alloy is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, cobalt 0-40%.
5, according to the said copper alloy electrode for resistance weld of claim 1, it is characterized by: contacted and metal alloy layer matrix outmost surface of said and matrix is a cobalt, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten, nickel.
6, according to the said copper alloy electrode for resistance weld of claim 5, it is characterized by: the percentage by weight that other alloying element in the said metal alloy accounts for metal alloy is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, nickel 0-40%.
7, according to the said copper alloy electrode for resistance weld of claim 1, it is characterized by: the alloy base in the said metal alloy composite is nickel or cobalt, and other alloying element in the alloy comprises boron, chromium, molybdenum, tungsten.
8, according to the said copper alloy electrode for resistance weld of claim 1, it is characterized by: the cermet in the said metal alloy composite strengthens body by tungsten carbide (WC), titanium carbide (TiC), zirconium boride (ZrB
2), titanium boride (TiB
2), titanium nitride (TiN), molybdenum silicide (MoSi
2) boron carbide (B
4C) and a kind of material in the CNT or multiple material form, the diameter that said cermet strengthens the particle of body or fiber is 10 nanometers-10 micron, the percent by volume that accounts for the metal alloy composite is 30-60%.
9, according to the said copper alloy electrode for resistance weld of claim 1; it is characterized by: in the said metal alloy composite the self-lubricating solid agent form by a kind of material in graphite, carbon fiber and the CNT or multiple material; the particle of said self-lubricating solid agent or the diameter of fiber are 10 nanometers-10 micron, and the percent by volume that accounts for the metal alloy composite is 5%-20%.
10, according to the said copper alloy electrode for resistance weld of claim 1, it is characterized by: the layer of metal alloy-layer that said outmost surface metal alloy layer has one deck to adopt chemical vapour deposition technique or physical vaporous deposition or high speed cold gas stream spraying WS2 method to form outward again.
11, a kind of copper alloy electrode for resistance weld manufacture method, adopt following manufacturing step at least: first step, adopt the method for electric spark deposition to plate metal alloy layer on the electrode tip surface; Second step adopts the method for electric spark deposition to plate metal alloy composite materials layer on the above-mentioned metal alloy layer that plates; Third step adopts the method for electric spark deposition to plate metal alloy layer on above-mentioned metal alloy composite layer, and in said second step, the metal alloy composite layer strengthens body by metal alloy, cermet and self-lubricating solid agent mixing is formed.
12, according to the said copper alloy electrode for resistance weld manufacture method of claim 11, it is characterized by: in said first step and the third step, the metal alloy layer matrix is a nickel, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten, cobalt.
13, according to the said copper alloy electrode for resistance weld manufacture method of claim 12, it is characterized by: the percentage by weight that other alloying element in the said metal alloy accounts for metal alloy is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, cobalt 0-40%.
14, according to the said copper alloy electrode for resistance weld manufacture method of claim 11, it is characterized by: in said first step and the third step, the metal alloy layer matrix is a cobalt, and other alloying element in the metal alloy comprises boron, chromium, molybdenum, tungsten, nickel.
15, according to the said copper alloy electrode for resistance weld manufacture method of claim 14, it is characterized by: the percentage by weight that other alloying element in the said metal alloy accounts for metal alloy is respectively boron 0-5%, chromium 1-20%, molybdenum 5-10%, tungsten 2-6%, nickel 0-40%.
16, according to the said copper alloy electrode for resistance weld manufacture method of claim 11, it is characterized by: the alloy base in the said metal alloy composite is nickel or cobalt, and other alloying element in the alloy comprises boron, chromium, molybdenum, tungsten.
17, according to claim 1
Said copper alloy electrode for resistance weld manufacture method is characterized by: the cermet in the said metal alloy composite strengthens body by tungsten carbide (WC), titanium carbide (TiC), zirconium boride (ZrB
2), titanium boride (TiB
2), titanium nitride (TiN), molybdenum silicide (MoSi
2) boron carbide (B
4C) and a kind of material in the CNT or multiple material form, the diameter that said cermet strengthens the particle of body or fiber is 10 nanometers-10 micron, the percent by volume that accounts for the metal alloy composite is 30-60%.
18, according to the said copper alloy electrode for resistance weld manufacture method of claim 11; it is characterized by: the self-lubricating solid agent in the said metal alloy composite is made up of a kind of material in graphite, carbon fiber and the CNT or multiple material; the particle of said self-lubricating solid agent or the diameter of fiber are 10 nanometers-10 micron, and the percent by volume that accounts for the metal alloy composite is 5%-20%.
19, according to the said copper alloy electrode for resistance weld manufacture method of claim 11, it is characterized by: in said second step, the electric spark deposition technological parameter is voltage 20-40 volt, electric capacity 50-1000 microfarad, atmosphere is air or argon gas, time 30-75 second, thickness 30-50 micron.
20, according to the said copper alloy electrode for resistance weld manufacture method of claim 11, it is characterized by: the 4th step is poly-, the layer of metal alloy-layer that adopts chemical vapour deposition technique or physical vaporous deposition or high speed cold gas stream spraying WS2 method to form on above-mentioned metal alloy layer.
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| CN117564544B (en) * | 2024-01-15 | 2024-03-26 | 长春三友汽车部件制造有限公司 | Tungsten copper cobalt molybdenum resistance spot welding electrode material and preparation method thereof |
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