CN110961825A - Copper-plating-free CO2+ Ar mixed gas shielded welding wire coating and its coated welding wire - Google Patents
Copper-plating-free CO2+ Ar mixed gas shielded welding wire coating and its coated welding wire Download PDFInfo
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- CN110961825A CN110961825A CN201911209393.6A CN201911209393A CN110961825A CN 110961825 A CN110961825 A CN 110961825A CN 201911209393 A CN201911209393 A CN 201911209393A CN 110961825 A CN110961825 A CN 110961825A
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- welding wire
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- carbonate
- copper
- mixed gas
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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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0272—Rods, electrodes, wires with more than one layer of coating or sheathing material
-
- 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
Abstract
The invention belongs to the technical field of welding wire coatings, and particularly relates to copper-plating-free CO2+ Ar mixed gas shielded welding wire coating and its coated welding wire. The main technical scheme is as follows: the surface coating comprises non-copper ion carbonic acid compound powder and an oily solvent; wherein the non-copper ion carbonate compound powder at least comprises one or more of strontium carbonate, barium carbonate and potassium carbonate, the non-copper ion carbonate compound powder is not less than 5% by mass, the coating is uniformly coated on the surface of the welding wire, and the coating amount is 0.1-0.3 g/m2Thus obtaining a novel coating welding wire. The copper-free CO2The + Ar mixed gas shielded welding wire coating and the coated welding wire thereof have the characteristics of remarkably stabilizing electric arcs, reducing welding spatters, obviously improving welding efficiency, having stable performance and being environment-friendly.
Description
Technical Field
The invention belongs to the technical field of welding wire coatings, and particularly relates to copper-plating-free CO2The + Ar mixed gas protection welding wire coating and the coating welding wire thereof are particularly suitable for welding high-strength steel.
Background
Gas shielded welding, in particular CO2The development of gas shielded welding has obvious effect on improving the welding efficiency, and has a dramatic progress in the aspect of welding. But because of CO2Gas shielded welding can spray more spatter during welding, and has adverse effects on welding work. CO 22The + Ar mixed gas shielded welding can solve the problem more perfectly, has an optimization effect on welding technology and quality, reduces the spattering rate to a certain degree, but has high strength during weldingThe application in steel is not ideal, and particularly, a copper-plated welding wire is used, a large amount of copper smoke is generated in welding, serious physical damage is caused to operators, and more problems exist in aspects of welding spatter, wire feeding and arc stability, abrasion and blockage of a contact tube, welding seam forming and the like. The more common and serious of these is weld cracking. Common weld cracks can be classified into hot cracks, cold cracks, and reheat cracks according to the temperature at which the weld cracks are generated. The cold cracks are most likely to occur in welding low and medium alloy high-strength steel, the mechanical property of a welding product is seriously influenced, and the serious loss is caused to industrial production.
Therefore, the copper-free welding wire is gradually accepted by the society and the general users due to the characteristics of environmental protection and no toxicity, and particularly, CO is used for high-strength steel welding operation2The application effect of the no-copper-plated welding wire for the Ar mixed gas shielded welding is outstanding, the high strength of the welding seam metal is ensured, the welding performance of the low-alloy high-strength welding wire is improved in a limited way, the occurrence of cold cracks is controlled, and the splashing rate is low. At present, a common welding wire without copper plating in China is understood as a special coating welding wire, but the coating components and the surface treatment modes of various manufacturers are different, so that the service performance of the final welding wire is influenced to be different.
Disclosure of Invention
The invention aims to provide an environment-friendly copper-plating-free CO which can obviously stabilize electric arc, reduce welding spatter, obviously improve welding quality, prevent welding seam crack and has stable performance2+ Ar mixed gas shielded welding wire coating and its coated welding wire.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
copper-plating-free CO2+ Ar mixed gas shielded welding wire coating comprising non-copper ion carbonate powder and oil solvent; wherein the non-copper ion carbonate compound powder at least comprises one or more of strontium carbonate, barium carbonate and potassium carbonate, and the non-copper ion carbonate compound powder is not less than 5% by mass.
Form the above copper plating-free CO2+ Ar mixed gas shielded welding wireAdditional technical features of the coating include:
-the non-cupric ion carbonate powder is in the mass ratio of 7.5% to 25%, and the oily solvent is vegetable oil or engine oil.
The non-copper ion carbonic acid compound powder is formed by mixing strontium carbonate, barium carbonate and potassium carbonate in the same mass ratio, the mass ratio of the mixture is 10-20%, and the vegetable oil forming the oily dissolving agent is palm oil, rapeseed oil or castor oil.
-the mass ratio of each component in the non-copper ionic carbonate powder consisting of strontium carbonate, barium carbonate and potassium carbonate mixed is 5%.
The coating also comprises 2-5% of wear-resisting agent and 5-10% of antirust agent.
The wear-resisting agent is one or more of sulfurized isobutylene, chlorinated paraffin, dibutyl phosphite and sodium chloride; the antirust agent is one or more of calcium oxide wax, barium petroleum sulfonate and sodium petroleum sulfonate.
The invention also provides copper plating-free CO2The + Ar mixed gas protection welding wire is provided with the coating on the surface, wherein the coating amount of the coating on the surface of the welding wire is 0.1 to 0.3g/m2。
The invention provides copper-plating-free CO2Compared with the prior art, the + Ar mixed gas welding wire coating and the coating welding wire thereof have the following advantages: first, the copper plating free CO2The Ar mixed gas welding wire solves the problem of environmental pollution caused in the copper plating process of the copper-plated welding wire, greatly saves the production cost of the welding wire, and has lower content of copper smoke dust in welding smoke dust and less harm to welding personnel; secondly, the non-copper ion carbonate compound powder and the oil solvent in the welding wire coating form stable colloid, so that the adhesion between the coating and the welding wire substrate is improved, and the coating has uniform components and stable structure; thirdly, the non-copper ion carbonate powder at least comprises one or more of strontium carbonate, barium carbonate and potassium carbonate, the non-copper ion carbonate powder is not less than 5% by mass, and the carbonate generates CO in the welding process2Protection ofThe gas improves the stability of electric arc, reduces splashing, forms beautiful welding seam formation, reduces the appearance of high-strength steel welding seam cracks, has an activating effect on non-copper ions, has low coating falling rate during welding, fundamentally solves the problem that the coating falls off to block a conductive nozzle, and improves the welding efficiency and the welding quality.
Drawings
FIG. 1 shows the copper plating free CO of the present invention2+ Ar mixed gas protective coating welding wire welding molten metal mechanical and chemical property experiment data;
FIG. 2 shows the Cu-free CO2+ Ar mixed gas protective coating welding wire is in the welding process and wire feeding motor voltage and welding voltage fluctuation schematic diagram;
FIG. 3 shows the Cu-free CO2Schematic diagram of current fluctuation of the + Ar mixed gas protective coating welding wire in the welding process.
Detailed Description
The following is a copper plating-free CO provided by the invention2The structure and the working principle of the + Ar mixed gas shielded welding wire coating and the coated welding wire thereof are further explained in detail.
The invention provides copper-plating-free CO2The + Ar mixed gas protection welding wire coating comprises non-copper ion carbonic compound powder and an oily solvent, wherein the non-copper ion carbonic compound powder at least comprises one or more of strontium carbonate, barium carbonate and potassium carbonate, and the non-copper ion carbonic compound powder is not less than 5% by mass ratio.
The working principle is as follows: one or more of non-copper ion carbonate powder such as strontium carbonate, barium carbonate and potassium carbonate is/are placed in an oil-based dissolving agent and mixed uniformly to form a coating carrier, the coating carrier is placed in a powder box, the coating carrier penetrates through the powder box in the process that a welding wire substrate is mechanically drawn through a wire drawing die, so that the surface of a welding wire is coated with a coating liquid, and as the mass ratio of the non-copper ion carbonate powder in the coating is not less than 5%, metal ions improve the welding activity, electric arc is more stable, and CO is generated by carbonate2The welding protective gas content is increased, the welding efficiency and quality are improved, the occurrence of welding seam cracks is prevented, and meanwhile, the welding efficiency is reducedThe spattering rate is low.
The novel copper-free CO2In the structure of the + Ar mixed gas shielded welding wire coating,
further, the mass ratio of the non-copper ion carbonic acid compound powder is controlled between 7.5% and 25%, and vegetable oil or engine oil is selected as the oily dissolving agent;
preferably, the non-copper ion carbonic acid compound powder is formed by mixing strontium carbonate, barium carbonate and potassium carbonate in the same mass ratio, the mass ratio of the mixture is 10-20%, the vegetable oil forming the oily solvent is palm oil or castor oil, various additive components and carrier grease form stable colloid, so that the coating is uniform in components and stable in structure, the corrosion resistance of the coating welding wire is improved, the coating falling rate is low during welding, the problem that the coating falls off to block the contact tube is fundamentally solved, the arc stability is improved, the splashing rate is reduced, and the welding quality is ensured;
as a preferred embodiment, the mass ratio of each component in the non-copper ion carbonate powder formed by mixing strontium carbonate, barium carbonate and potassium carbonate is 5%, and the metal ions have excellent activation effect, so that the metal inclusions in the welding seam grow up in a short time in the welding process, the growth of acicular ferrite is promoted, a chain structure is formed, the expansion of cracks can be well prevented, the strength and toughness of the welding seam are enhanced, and the components in the coating are cheap, so that the production cost of the coating is reduced, and the economic benefit is better;
in order to enhance the comprehensive use performance of the coating welding wire, preferably, the coating components also comprise 2-5% of a wear-resisting agent and 5-10% of a rust-resisting agent;
further, the wear-resisting agent is one or more of sulfurized isobutylene, chlorinated paraffin, dibutyl phosphite and sodium chloride, and the antirust agent is one or more of calcium oxide wax, barium petroleum sulfonate and sodium petroleum sulfonate.
The invention also provides copper plating-free CO2The + Ar mixed gas protection welding wire is provided with the coating on the surface, wherein the coating on the surface of the welding wireIn an amount of 0.1 to 0.3g/m2。
Weighing raw materials of the surface coating of the welding wire according to the mass ratio, namely non-copper ion carbonate compound powder with the mass ratio of not less than 5 percent, such as one or more of strontium carbonate, barium carbonate and potassium carbonate and other powder, uniformly mixing, grinding, sieving and drying; pretreating a welding wire substrate, including mechanical polishing, acid washing and alkali washing, soaking in a borax solution, drying and roughening the surface; and mechanically drawing the pretreated welding wire substrate, and coating the surface coating powder on the surface of the pretreated welding wire substrate in the mechanical drawing process to obtain the coated welding wire.
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
According to the mass ratio, 85% of palm oil is used as a coating carrier, 5% of strontium carbonate, 5% of barium carbonate and 5% of potassium carbonate are respectively added into the palm oil and stirred uniformly to form a coating liquid, and the pretreated welding wire substrate is immersed into the coating liquid and stays for 3 seconds.
Example 2
According to the mass ratio, 85% of palm oil is used as a coating carrier, 2% of strontium carbonate, 5.5% of barium carbonate and 7.5% of potassium carbonate are respectively added into the palm oil and stirred uniformly to form a coating liquid, and the pretreated welding wire substrate is immersed into the coating liquid and stays for 2 seconds.
Example 3
According to the mass ratio, 70% of palm oil is used as a coating carrier, 2% of strontium carbonate, 5.5% of barium carbonate, 7.5% of potassium carbonate, 5% of sodium chloride and 10% of calcium wax oxide are respectively added into the palm oil and uniformly stirred to form a coating liquid, the pretreated welding wire substrate is subjected to welding wire surface coating treatment at the temperature of 80 ℃, and the welding wire is immersed into the coating liquid and stays for 3 seconds.
Example 4
According to the mass ratio, 75% of palm oil is used as a coating carrier, 5% of strontium carbonate, 5% of barium carbonate and 5% of potassium carbonate are respectively added into the coating carrier, 2% of sodium chloride, 4% of barium petroleum sulfonate and 4% of sodium petroleum sulfonate are uniformly stirred to form a coating liquid, the pretreated welding wire substrate is subjected to welding wire surface coating treatment at the temperature of 80 ℃, and the welding wire is immersed into the coating liquid and stays for 2 seconds.
The welding wire coatings in the above embodiments are respectively coated outside the Xinyu GHS-80 type welding wire substrate, and the high-strength steel welding performance test is carried out (protective gas: 80% Ar +20% CO)2) The experimental data are as follows:
the chemical components (wt%) of the gold melting: c =0.07, Si =0.5, Mn =1.52, P =0.008, S = 0.005.
The mechanical and chemical properties of the molten metal are shown in figure 1, wherein comparative example 1 is a common coating welding wire without copper plating, and comparative example 2 is a common copper plating welding wire.
As can be seen from FIG. 1, the welding wire prepared by controlling the proper proportion of strontium carbonate, barium carbonate and potassium carbonate has good tensile strength, the welding joint has good toughness, and the low-temperature impact toughness of the welding seam is further improved; the coating powder is coated on the surface of the welding wire, so that the stability of electric arc in the welding process is good, molten drops are refined, the splashing rate is greatly reduced, and the performance requirement of practical application on the welding wire is met.
The voltage and current of the embodiments 1 to 4 of the patent are detected to be stable by a waveform tester, as shown in fig. 2, the voltage variation range of the wire feeding motor is within a range of +/-1.2 v, the welding voltage is kept constant and is in a linear shape, as shown in fig. 3, the current variation range is within a range of +/-4.5A, and the conditions that the welding wire feeding is smooth, the electric arc is stable and the using effect is better are shown.
Claims (7)
1. Copper-plating-free CO2+ Ar mixed gas shielded welding wire coating, its characterized in that: comprises non-copper ion carbonic acid compound powder and an oily solvent; wherein the non-copper ion carbonate compound powder at least comprises one or more of strontium carbonate, barium carbonate and potassium carbonate, and the non-copper ion carbonate compound powder is not less than 5% by mass.
2. The copper plating free CO composition according to claim 12+ Ar mixed gas shielded welding wire coating, its characterized in that: the mass ratio of the non-copper ion carbonic acid compound powder is between 7.5 and 25 percent, and the oily solventIs vegetable oil or engine oil.
3. The copper plating free CO composition according to claim 22+ Ar mixed gas shielded welding wire coating, its characterized in that: the non-copper ion carbonic acid compound powder is formed by mixing strontium carbonate, barium carbonate and potassium carbonate in the same mass ratio, the mass ratio of the mixture is 10-20%, and the vegetable oil forming the oily solvent is palm oil, rapeseed oil or castor oil.
4. The Cu plating-free CO composition according to claim 32+ Ar mixed gas shielded welding wire coating, its characterized in that: the mass ratio of each component in the non-copper ion carbonate powder formed by mixing strontium carbonate, barium carbonate and potassium carbonate was 5%.
5. The copper plating free CO composition according to claim 12+ Ar mixed gas shielded welding wire coating, its characterized in that: the coating also comprises 2-5% of wear-resisting agent and 5-10% of antirust agent.
6. The Cu plating-free CO composition according to claim 52+ Ar mixed gas shielded welding wire coating, its characterized in that: the wear-resisting agent is one or more of sulfurized isobutylene, chlorinated paraffin, dibutyl phosphite and sodium chloride; the antirust agent is one or more of calcium oxide wax, barium petroleum sulfonate and sodium petroleum sulfonate.
7. Copper-plating-free CO2+ Ar mixed gas shielded welding wire, its characterized in that: the surface of the welding wire is provided with the coating layer as claimed in claims 1 to 6, wherein the coating amount of the surface coating layer is 0.1 to 0.3g/m2。
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| CN201911209393.6A CN110961825A (en) | 2019-12-01 | 2019-12-01 | Copper-plating-free CO2+ Ar mixed gas shielded welding wire coating and its coated welding wire |
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Citations (6)
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| JPS63108996A (en) * | 1986-10-27 | 1988-05-13 | Kobe Steel Ltd | Steel wire for welding and its manufacture |
| US4871898A (en) * | 1988-08-17 | 1989-10-03 | Union Carbide Corporation | Constant arc voltage gas metal arc welding process |
| CN101633083A (en) * | 2009-07-31 | 2010-01-27 | 天津大学 | Coating welding wire for carbon dioxide arc welding and preparation method thereof |
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2019
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| JPS63108996A (en) * | 1986-10-27 | 1988-05-13 | Kobe Steel Ltd | Steel wire for welding and its manufacture |
| US4871898A (en) * | 1988-08-17 | 1989-10-03 | Union Carbide Corporation | Constant arc voltage gas metal arc welding process |
| CN101745749A (en) * | 2008-12-19 | 2010-06-23 | 中冶焊接科技有限公司 | Coating welding wire and preparation method thereof |
| CN101633083A (en) * | 2009-07-31 | 2010-01-27 | 天津大学 | Coating welding wire for carbon dioxide arc welding and preparation method thereof |
| CN106086975A (en) * | 2016-08-29 | 2016-11-09 | 宁波江东甬风工业设计有限公司 | A kind of preparation method of environmentally friendly stainless steel welding stick without copper facing |
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Application publication date: 20200407 |