CN115555760A - Copper-free welding wire, coating thereof and preparation method - Google Patents
Copper-free welding wire, coating thereof and preparation method Download PDFInfo
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- CN115555760A CN115555760A CN202211320835.6A CN202211320835A CN115555760A CN 115555760 A CN115555760 A CN 115555760A CN 202211320835 A CN202211320835 A CN 202211320835A CN 115555760 A CN115555760 A CN 115555760A
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- 238000000576 coating method Methods 0.000 title claims abstract description 105
- 238000003466 welding Methods 0.000 title claims abstract description 97
- 239000011248 coating agent Substances 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 29
- 239000010439 graphite Substances 0.000 claims abstract description 29
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims abstract description 24
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 21
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 20
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 20
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 11
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 9
- 239000008116 calcium stearate Substances 0.000 claims description 9
- 235000013539 calcium stearate Nutrition 0.000 claims description 9
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 9
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 claims description 2
- 238000007788 roughening Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 230000001050 lubricating effect Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000035553 feeding performance Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
- Lubricants (AREA)
Abstract
The invention provides a copper-free welding wire, a coating thereof and a preparation method, and particularly relates to the field of welding materials. The copper-plating-free welding wire coating is characterized by comprising the following components in percentage by mass: 70-80% of stearate, 10-20% of molybdenum disulfide, 3-5% of colloidal graphite, 1-2% of polytetrafluoroethylene and 6-10% of titanium nitride. The coating of the copper-free welding wire is compact and not easy to fall off, has good wire feeding stability, has small abrasion of a contact tube, and has simple process production and greatly reduced cost.
Description
Technical Field
The invention relates to the field of welding materials, in particular to a copper-free welding wire, a coating thereof and a preparation method thereof.
Background
With the increasing application degree of the copper-free welding wires in the market in recent years, the copper-free welding wires gradually replace the copper-plated welding wires is the current development trend. The copper plating process is omitted in the production of the copper-free welding wire, the surface coating is used for replacing the original copper plating layer, so that the welding wire meets the requirements of the welding process in the aspects of conductivity, rust prevention, lubrication and the like, meanwhile, the copper-free welding wire is energy-saving and environment-friendly in the production and use processes, and the working environment is greatly improved. Compared with copper-plated welding wires, the domestic copper-plated welding wires have several problems, which are mainly shown in that: firstly, the coating process of the copper-free welding wire is complex and the cost is high; the surface coating of the copper-free welding wire is not compact and is easy to fall off, and the fallen coating not only ensures that the wire feeding is not smooth in the welding process, but also blocks a wire feeding system in welding equipment in the use process; and thirdly, the contact tip is seriously worn.
Disclosure of Invention
In view of the defects of the prior art, the invention provides a copper-free welding wire, a coating and a preparation method thereof, which aim to solve the problems of high preparation cost, non-compact coating and serious wear of a contact tip of the coated welding wire.
To achieve the above and other related objects, the present invention provides a copper-free welding wire coating, comprising the following components: 70-80% of stearate, 10-20% of molybdenum disulfide, 3-5% of colloidal graphite, 1-2% of polytetrafluoroethylene and 6-10% of titanium nitride.
In an example of the present invention, the stearate is either one or both of calcium stearate and sodium stearate.
In one example of the present invention, the particle size of the molybdenum disulfide is less than or equal to 0.5 μm, the particle size of the colloidal graphite is 1 to 10 μm, and the particle size of the titanium nitride is 1 to 10 μm.
The invention provides a copper-free welding wire which comprises a wire rod and a coating, wherein the coating comprises the following components in percentage by mass: 70-80% of stearate, 10-20% of molybdenum disulfide, 3-5% of colloidal graphite, 1-2% of polytetrafluoroethylene and 6-10% of titanium nitride.
In an example of the present invention, the weight of the coating layer in the copper-free welding wire is 0.01 to 0.05% of the total weight of the copper-free welding wire.
In one example of the invention, the wire rod is ER50-6 wire rod, and the diameter of the wire rod is 5.5-6.5 mm.
In an example of the present invention, the diameter of the copper-free welding wire is 0.8 to 1.6mm.
The invention provides a preparation method of a copper-plating-free welding wire, which comprises the following steps: providing a wire rod; uniformly mixing the components to prepare a coating; mechanically peeling the wire rod, and performing rust removal and rough texturing treatment; applying a prepared coating to the wire rod, compressing the applied coating; drawing for many times to obtain the welding wire without copper plating.
In one example of the invention, during the rust removal rough texturing treatment, the wire rod is subjected to the rust removal rough texturing treatment by sequentially using a first gauze belt and a second gauze belt, wherein the mesh number of the first gauze belt is 30-50 meshes, and the mesh number of the second gauze belt is 50-80 meshes.
In an example of the invention, the surface of the welding wire is coated with lubricating powder in the drawing process.
According to the coating welding wire, the stearate and the polytetrafluoroethylene are added into the coating, so that the smoothness of welding wire drawing can be improved, the production efficiency is improved, and the cost is reduced; the molybdenum disulfide has good metal surface adhesion, and the molybdenum disulfide and the colloidal graphite added into the coating can enhance the bonding strength of the coating and the wire rod, ensure that the coating is compact and is not easy to fall off; the molybdenum disulfide and the colloidal graphite have good conductivity and high temperature resistance, and the added molybdenum disulfide and the colloidal graphite can reduce the resistance value of the surface of the welding wire and reduce the temperature of a contact tip during welding; the titanium nitride is added to effectively reduce the abrasion of the contact tip.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram: the invention relates to a process flow chart of a preparation method of a copper-plating-free welding wire.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
It should be noted that "%" and "wt%" in the present specification each represent a mass percentage.
The invention provides a copper-free welding wire, a coating and a preparation method thereof.
The coating of the copper-free welding wire comprises the following components in percentage by mass: 70-80% of stearate, 10-20% of molybdenum disulfide, 3-5% of colloidal graphite, 1-2% of polytetrafluoroethylene and 6-10% of titanium nitride.
The functions of the components in the coating are as follows:
stearate salt: as a lubricating carrier, the smoothness of drawing of the coated welding wire can be improved, and the wire feeding stability and the arc stability of the welding wire can be improved. In the present invention, the mass percentage of the stearate is 70 to 80%, and for example, the mass percentage of the stearate may be any value within a range of 70 to 80%, such as 70%, 73%, 78%, or 80%. The stearate in the invention is one or two of calcium stearate and sodium stearate.
Molybdenum disulfide: the conductivity is improved, the surface resistance value of the welding wire is reduced, and the bonding strength of the coating and the welding wire substrate is enhanced. The mass percent of the molybdenum disulfide in the invention is 10-20%, for example, the mass percent of the molybdenum disulfide can be any value in the range of 10% -20%, such as 10%, 15% or 20%.
Colloidal graphite: the conductivity of the coating is improved, and the surface resistance value of the welding wire is reduced. The mass percentage of the colloidal graphite in the present invention is 3 to 5%, and the mass percentage of the colloidal graphite may be any value within a range of 3 to 5%, such as 3%, 4%, or 5%.
Polytetrafluoroethylene: lubrication, and reduction of drawing resistance and wire feed resistance during welding. In the present invention, the polytetrafluoroethylene content is 1 to 2% by mass, and for example, the polytetrafluoroethylene content may be any value in the range of 1 to 2%, such as 1%, 1.5%, or 2%.
Titanium nitride: the conductivity of the coating is improved, and the abrasion of the contact nozzle is reduced. In the present invention, the titanium nitride content is 6 to 10% by mass, and for example, the titanium nitride content may be any value within a range of 6 to 10%, such as 6%, 7.5%, 9%, or 10%.
In one embodiment, the particle size of the molybdenum disulfide is 0.5 μm or less, the particle size of the colloidal graphite is 1 to 10 μm, and the particle size of the titanium nitride is 1 to 10 μm, for example, the particle size of the colloidal graphite may be any value in the range of 1 to 10 μm, such as 1 μm, 5 μm, 8 μm, or 10 μm; the particle diameter of titanium nitride may be any value within the range of 1 to 10 μm, such as 1 μm, 3 μm, 8 μm, or 10 μm.
The copper-free welding wire comprises a wire rod and a coating, wherein the coating comprises the following components: 70-80% of stearate, 10-20% of molybdenum disulfide, 3-5% of colloidal graphite, 1-2% of polytetrafluoroethylene and 6-10% of titanium nitride.
In one embodiment, the coating rate of the coating layer in the coated welding wire, i.e., the weight of the coating layer, is 0.01 to 0.05% of the total weight of the coated welding wire, for example, the coating rate of the coating layer may be any value in the range of 0.01 to 0.05%, such as 0.01%, 0.02%, 0.04%, 0.05%, or the like.
In one embodiment, the ER50-6 wire rod is used as the wire rod of the coated welding wire, and the diameter of the wire rod is 5.5-6.5 mm, for example, the diameter of the wire rod can be any value in the range of 5.5-6.5 mm, such as 5.5mm, 6mm or 6.5mm.
In one embodiment, the diameter of the coated welding wire is 0.8mm to 1.6mm, for example, the diameter of the coated welding wire may be any value in the range of 0.8mm to 1.6mm, such as 0.8mm, 1.1mm, 1.3mm, or 1.6mm.
Referring to fig. 1, the present invention provides a method for preparing a copper-free welding wire, comprising the following steps:
s1, providing a wire rod;
s2, uniformly mixing the components of the coating according to the proportion;
s3, mechanically peeling the wire rod, and performing rust removal and rough texturing treatment;
s4, coating the prepared coating on the wire rod, and compressing the coating;
and S5, drawing for multiple times to obtain the copper-free welding wire.
In step S1, the wire rod is an ER50-6 wire rod, the diameter of the wire rod is 5.5 to 6.5mm, and the diameter of the wire rod may be any value in the range of 5.5 to 6.5mm, such as 5.5mm, 6mm, or 6.5mm.
In step S2, the components in the coating are as follows: 70 to 80 percent of stearate, 10 to 20 percent of molybdenum disulfide, 3 to 5 percent of colloidal graphite, 1 to 2 percent of polytetrafluoroethylene and 6 to 10 percent of titanium nitride are mixed and stirred evenly.
In step S3, the wire rod is mechanically peeled, and then the peeled wire rod is subjected to rust removal and rough texturing treatment. The wire rod is sequentially treated by a first gauze belt and a second gauze belt during rough texturing treatment, the mesh number of the first gauze belt is 30-50 meshes, the mesh number of the second gauze belt is 50-80 meshes, for example, the mesh number of the first gauze belt can be any value within the range of 30-50 meshes such as 30 meshes, 40 meshes or 50 meshes, and the mesh number of the second gauze belt can be any value within the range of 50-80 meshes such as 50 meshes, 60 meshes, 70 meshes or 80 meshes. The wire rod is subjected to rough texturing treatment, so that the roughness of the wire rod can be improved, the bonding strength of the coating and the wire rod is enhanced, and the coating is compact and is not easy to fall off.
And S4, coating the prepared coating on the surface of the wire rod, putting the wire rod coated with the coating into a die for drawing, and extruding the coating on the surface of the wire rod to be firm in the drawing process.
In step S5, the lubricant powder can be used to increase the lubricity during drawing, so that the drawing is smoother.
According to the preparation method of the copper-free welding wire, the coating is coated on the surface of the wire rod before the first drawing, then the wire rod is drawn, and then the wire rod coated with the coating is drawn by coating lubricating powder so as to improve the drawing smoothness. Because the components such as molybdenum disulfide, colloidal graphite and the like are added into the coating, the coating can form a compact and uniform film on the surface of the wire rod, the wire rod is isolated from the lubricating powder, the lubricating powder can be easily wiped off after the wire rod is drawn, and the smooth, compact and low-falling-off rate of the surface of the welding wire coating is ensured.
The invention is described in detail below with reference to specific examples. The drugs used in the following examples are all available by general commercial means.
Example 1
The copper-free welding wire comprises a wire rod and a coating coated on the surface of the wire rod, wherein the coating comprises the following components in percentage by mass: 70% of calcium stearate, 20% of molybdenum disulfide, 3% of colloidal graphite, 1% of polytetrafluoroethylene and 6% of titanium nitride. The wire rod is made of 6.5mm ER50-6 wire rods, rough texturing treatment is carried out on the wire rod through a first gauze belt of 30 meshes and a second gauze belt of 50 meshes in sequence, the coating is uniformly mixed and coated on the surface of the wire rod, the coating is compressed and coated, and the welding wire is obtained after drawing for multiple times. The coating rate of the coating was 0.049%, and the diameter of the wire was 1.6mm.
Example 2
The copper-free welding wire comprises a wire rod and a coating coated on the surface of the wire rod, wherein the coating comprises the following components in percentage by mass: 80% of sodium stearate, 10% of molybdenum disulfide, 3% of colloidal graphite, 1% of polytetrafluoroethylene and 6% of titanium nitride. The wire rod is made of 6.5mm ER50-6 wire rods, after rough texturing treatment is conducted on the wire rod through a 40-mesh first gauze belt and a 60-mesh second gauze belt in sequence, the coatings are evenly mixed and coated on the surface of the wire rod, the coatings are coated in a compressed mode, and the welding wire is obtained after drawing for multiple times. The coating rate of the coating was 0.035%, and the diameter of the wire was 1.2mm.
Example 3
The copper-free welding wire comprises a wire rod and a coating coated on the surface of the wire rod, wherein the coating comprises the following components in percentage by mass: 75% of stearate (15% of calcium stearate and 60% of sodium stearate), 15% of molybdenum disulfide, 3% of colloidal graphite, 1% of polytetrafluoroethylene and 6% of titanium nitride. The wire rod is made of 6.5mm ER50-6 wire rods, after rough texturing treatment is carried out on the wire rod through a 50-mesh first gauze belt and an 80-mesh second gauze belt in sequence, the coating is uniformly mixed and coated on the surface of the wire rod, the coating is compressed and coated, and the welding wire is obtained after drawing for multiple times. The coating rate of the coating was 0.021%, and the diameter of the wire was 1.2mm.
Example 4
The copper-free welding wire comprises a wire rod and a coating coated on the surface of the wire rod, wherein the coating comprises the following components in percentage by mass: 70% of stearate (10% of calcium stearate, 60% of sodium stearate), 14% of molybdenum disulfide, 5% of colloidal graphite, 1% of polytetrafluoroethylene and 10% of titanium nitride. The wire rod is made of 6.5mm ER50-6 wire rods, after rough texturing treatment is conducted on the wire rod through a first gauze belt of 50 meshes and a second gauze belt of 70 meshes in sequence, coatings are evenly mixed and coated on the surface of the wire rod, the coatings are coated in a compressed mode, and the welding wire is obtained after drawing for multiple times. The coating rate of the coating was 0.022%, and the diameter of the wire was 1.2mm.
Example 5
The copper-free welding wire comprises a wire rod and a coating coated on the surface of the wire rod, wherein the coating comprises the following components in percentage by mass: 70% of stearate (wherein the calcium stearate accounts for 20%, and the sodium stearate accounts for 50%), 18% of molybdenum disulfide, 4% of colloidal graphite, 2% of polytetrafluoroethylene and 6% of titanium nitride. The wire rod is made of 6.5mm ER50-6 wire rods, rough texturing treatment is carried out on the wire rod through a 40-mesh first gauze belt and an 80-mesh second gauze belt in sequence, the coatings are uniformly mixed and coated on the surface of the wire rod, the coatings are coated in a compression mode, and the welding wire is obtained after drawing for multiple times. The coating rate of the coating was 0.048%, and the diameter of the wire was 1.2mm.
Example 6
The copper-free welding wire comprises a wire rod and a coating coated on the surface of the wire rod, wherein the coating comprises the following components in percentage by mass: 75% of stearate (wherein the calcium stearate is 20%, the sodium stearate is 55%), 11% of molybdenum disulfide, 4% of colloidal graphite, 2% of polytetrafluoroethylene and 8% of titanium nitride. The wire rod is made of 5.5mm ER50-6 wire rods, after rough texturing treatment is conducted on the wire rod through a 50-mesh first gauze belt and an 80-mesh second gauze belt in sequence, the coatings are uniformly mixed and coated on the surface of the wire rod, the coatings are compressed and coated, and the welding wire is obtained after drawing for multiple times. The coating rate of the coating was 0.01%, and the diameter of the wire was 0.8mm.
Example 7
The copper-free welding wire comprises a wire rod and a coating coated on the surface of the wire rod, wherein the coating comprises the following components in percentage by mass: 72% of stearate (wherein the calcium stearate is 36% and the sodium stearate is 36%), 14% of molybdenum disulfide, 4% of colloidal graphite, 2% of polytetrafluoroethylene and 8% of titanium nitride. The wire rod is made of 5.5mm ER50-6 wire rods, rough texturing treatment is carried out on the wire rod through a 40-mesh first gauze belt and an 80-mesh second gauze belt in sequence, the coatings are uniformly mixed and coated on the surface of the wire rod, the coatings are coated in a compression mode, and the welding wire is obtained after drawing for multiple times. The coating rate of the coating was 0.015% and the diameter of the wire was 1.0mm.
The welding tests were carried out according to the relevant standard specifications for the copper-free welding wires of examples 1 to 7. The welding process parameters are as in table 1 below, and the welding properties are as in table 2 below.
TABLE 1 welding Process parameters
TABLE 2 welding Process Properties
The test results of examples 1 to 7 show that the welding wire without copper plating has the advantages of small wear rate of a contact tip during welding, good wire feeding performance and arc stability, and better comprehensive performance than the welding wire without copper plating and the welding wire with copper plating on the market.
According to the copper-free welding wire, the stearate and the polytetrafluoroethylene are added into the coating, so that the smoothness of the welding wire drawing can be improved, and the production efficiency is improved; the molybdenum disulfide has good metal surface adhesion, and the molybdenum disulfide and the colloidal graphite added into the coating can enhance the bonding strength of the coating and the wire rod, so that the coating is compact and is not easy to fall off; the molybdenum disulfide and the colloidal graphite have good conductivity and high temperature resistance, and the added molybdenum disulfide and the colloidal graphite can reduce the resistance value of the surface of the welding wire and reduce the temperature of a contact tip during welding; the wear of the contact tube can be effectively reduced by adding the titanium nitride; and the preparation process is simple, the cost can be greatly reduced, and the method is favorable for industrial production. Therefore, the invention effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The coating of the copper-free welding wire is characterized by comprising the following components in percentage by mass: 70-80% of stearate, 10-20% of molybdenum disulfide, 3-5% of colloidal graphite, 1-2% of polytetrafluoroethylene and 6-10% of titanium nitride.
2. The coating for a copper-free welding wire according to claim 1, wherein the stearate is one or both of calcium stearate and sodium stearate.
3. The copper-free welding wire coating according to claim 1, wherein the particle size of the molybdenum disulfide is less than or equal to 0.5 μm, the particle size of the colloidal graphite is 1 to 10 μm, and the particle size of the titanium nitride is 1 to 10 μm.
4. The copper-free welding wire is characterized by comprising a wire rod and a coating, wherein the coating comprises the following components in percentage by mass: 70-80% of stearate, 10-20% of molybdenum disulfide, 3-5% of colloidal graphite, 1-2% of polytetrafluoroethylene and 6-10% of titanium nitride.
5. The copper-free welding wire according to claim 4, wherein the weight of the coating in the copper-free welding wire is 0.01 to 0.05% of the total weight of the copper-free welding wire.
6. The copper-free welding wire according to claim 4, wherein the wire rod is an ER50-6 wire rod, and the diameter of the wire rod is 5.5 to 6.5mm.
7. The copper-free welding wire according to claim 4, wherein the diameter of the copper-free welding wire is 0.8 to 1.6mm.
8. The preparation method of the copper-free welding wire is characterized by comprising the following steps:
providing a wire rod;
mixing the components of claim 1 to form a coating;
mechanically peeling the wire rod, and performing rust removal, rough texturing treatment;
applying the prepared coating to the wire rod, and compressing the applied coating;
drawing for many times to obtain the welding wire without copper plating.
9. The method for preparing the copper-free welding wire according to claim 8, wherein the wire rod is subjected to the rust removal rough roughening treatment by sequentially using a first gauze belt and a second gauze belt, the mesh number of the first gauze belt is 30-50 meshes, and the mesh number of the second gauze belt is 50-80 meshes.
10. The method for preparing a copper-free welding wire according to claim 8, wherein a lubricant is applied to the surface of the welding wire during the drawing process.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005059614A1 (en) * | 2005-12-12 | 2007-06-14 | Nano-X Gmbh | Anti-corrosion and/or anti-scaling coating for metals (especially steel) is applied by wet methods and heat treated to give a weldable coating |
| CN102844149A (en) * | 2010-04-02 | 2012-12-26 | 林肯环球股份有限公司 | Feeding lubricant for cored welding electrode, cored welding electrode and gmaw process |
| CN108941979A (en) * | 2018-09-05 | 2018-12-07 | 天津市永昌焊丝有限公司 | A kind of no copper facing ER50-6 gas shielded solid welding wire |
| CN109836855A (en) * | 2017-09-28 | 2019-06-04 | 南京龙贞自控科技发展有限公司 | A kind of anticorrosive hydraulic pressure vulcanizing machine |
| CN114769944A (en) * | 2022-01-17 | 2022-07-22 | 许毅 | Copper-plating-free nano-coating welding wire and processing technology thereof |
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2022
- 2022-10-26 CN CN202211320835.6A patent/CN115555760A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005059614A1 (en) * | 2005-12-12 | 2007-06-14 | Nano-X Gmbh | Anti-corrosion and/or anti-scaling coating for metals (especially steel) is applied by wet methods and heat treated to give a weldable coating |
| CN102844149A (en) * | 2010-04-02 | 2012-12-26 | 林肯环球股份有限公司 | Feeding lubricant for cored welding electrode, cored welding electrode and gmaw process |
| CN109836855A (en) * | 2017-09-28 | 2019-06-04 | 南京龙贞自控科技发展有限公司 | A kind of anticorrosive hydraulic pressure vulcanizing machine |
| CN108941979A (en) * | 2018-09-05 | 2018-12-07 | 天津市永昌焊丝有限公司 | A kind of no copper facing ER50-6 gas shielded solid welding wire |
| CN114769944A (en) * | 2022-01-17 | 2022-07-22 | 许毅 | Copper-plating-free nano-coating welding wire and processing technology thereof |
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