CN112404789A - Formula and process of self-shielded flux-cored wire - Google Patents
Formula and process of self-shielded flux-cored wire Download PDFInfo
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- CN112404789A CN112404789A CN202011266180.XA CN202011266180A CN112404789A CN 112404789 A CN112404789 A CN 112404789A CN 202011266180 A CN202011266180 A CN 202011266180A CN 112404789 A CN112404789 A CN 112404789A
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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
- B23K35/0266—Rods, electrodes, wires flux-cored
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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
- B23K35/3601—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 with inorganic compounds as principal constituents
- B23K35/3608—Titania or titanates
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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
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
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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
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
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Abstract
The invention discloses a self-protection flux-cored wire formula and a process, which comprises a flux-cored wire body, wherein the flux-cored wire body is made of an aluminum strip, a flux-cored layer, a wrapping layer, an isolation layer and an external steel coil layer, the aluminum strip, the flux-cored layer, the wrapping layer, the isolation layer and the external steel coil layer are coaxially distributed, and the aluminum strip, the flux-cored layer, the wrapping layer, the isolation layer and the external steel coil layer are sequentially wrapped from inside to outside. The invention improves the overall welding performance of the welding wire by the formula, ensures that the welding process performance reaches the optimum, adopts the nested structure of the aluminum strip, the flux core layer, the wrapping layer, the isolating layer and the external coil steel layer for the flux-cored wire body, and is matched with the processing technology of the self-protection flux-cored wire, so that the flux-cored compactness of the welding wire can be improved during production, the uniform distribution of flux cores is ensured, the cold-rolled coil steel rolls a U-shaped groove and is subjected to isothermal quenching treatment, the ductility and toughness of the external coil steel layer are improved, and the tensile property and yield strength of the flux-cored wire body are improved by matching with the aluminum.
Description
Technical Field
The invention relates to the technical field of welding wire preparation, in particular to a formula and a process of a self-protection flux-cored wire.
Background
Self-shielded flux cored wires represent the direction of welding material development in the world today. The self-shielded flux-cored wire can realize the dual purposes of on-site welding and automatic welding production, and is widely applied to the field of welding of steel products with different positions and different strength grades at home and abroad as a novel welding material which is efficient and suitable for outdoor operation. The method is applied to the industrial departments of shipbuilding, chemical engineering, metallurgical building and mechanical manufacturing, and the fields of drilling platforms, petroleum pipelines, container welding and the like.
The difference between the flux-cored wire and the solid-cored wire is that the flux core is arranged in the flux-cored wire. The flux core acts similar to the electrode coating: such as arc stabilization, operation performance improvement, protection, alloy component addition, joint mechanical property improvement and the like, and the solid welding wire has high production efficiency compared with the flux-cored wire and can be continuously and automatically produced; (2) the deposition speed is high; (3) the section of the welding seam is large, the angle of the groove can be reduced, and deposited metal is saved; (4) has obvious metallurgical improvement effect on welding lines, and the welding lines have good technological properties and mechanical properties. The flux-cored wire integrates the advantages of a welding rod and a solid wire. And the productivity of the self-shielded flux-cored wire is improved by 3 to 5 times compared with that of a manual welding rod. The metal of the discarded welding rod is saved by about 12 percent, the electric energy is saved by 40 percent, and the construction period can be shortened.
The existing protection flux-cored wire is directly filled with flux-cored materials in preparation, isolation protection is lacked, the toughness and the drawing performance of the overall structure are poor, the wire is easy to damage and leak, the inner flux core is easy to oxidize after being placed for a long time, and the welding is not convenient to stably carry out.
Therefore, it is necessary to invent a self-shielded flux-cored wire formula and a process to solve the above problems.
Disclosure of Invention
The invention aims to provide a formula and a process of a self-protection flux-cored wire, which are used for improving the overall welding performance of the wire, reducing the number of air holes on the surface of a welding layer, ensuring strong fusion among mixed alloys, improving the welding strength and ensuring the optimal welding process performance.
In order to achieve the above purpose, the invention provides the following technical scheme: a self-protection flux-cored wire formula comprises a flux-cored wire body, wherein the flux-cored wire body is made of an aluminum strip, a flux-cored layer, a wrapping layer, an isolation layer and an external steel rolling layer, the aluminum strip, the flux-cored layer, the wrapping layer, the isolation layer and the external steel rolling layer are coaxially distributed, and the aluminum strip, the flux-cored layer, the wrapping layer, the isolation layer and the external steel rolling layer are sequentially wrapped from inside to outside;
the medicine core layer comprises the following main materials in parts by weight: 10-20 parts of rutile powder, 8-15 parts of anorthite powder, 5-7 parts of dolomite powder, 6-10 parts of aluminum magnesium alloy powder, 3-4 parts of fluoride, 3-4 parts of molybdenum powder, 1-2 parts of zirconium powder, 4-7 parts of silicon nitride, 5-8 parts of electrolytic manganese, 4-8 parts of iron powder, 2-5 parts of rare earth and 2-5 parts of rare metal;
the diameter ratio between the aluminum strip and the medicine core layer is set to be 1: 8-10, the thickness of the outer coil steel layer is set to be 0.02-0.04mm, and the thickness of the spacer is set to be 0.5-1 mm.
Preferably, the wrapping is made of a tin foil material.
Preferably, the outer steel coil layer is made of cold rolled steel, and the initial cross-sectional shape of the cold rolled steel is provided in a U-shape.
Preferably, the separation layer is made of zeolite powder, and the average particle diameter of the zeolite powder is set to 80 mesh.
A processing technology of a self-protection flux-cored wire comprises the following specific operation steps:
the method comprises the following steps: preparing and pretreating raw materials, preparing rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal according to a proportion, respectively drying, and preparing tin foil, cold-rolled coil steel and zeolite powder;
step two: preparing a medicine core layer, mixing dried rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal, screening large-particle impurities, adding the mixture into a stirrer, heating and stirring, introducing nitrogen during heating, uniformly stirring, taking out, and performing vacuum cooling;
step three: pre-forming a flux-cored wire body, paving the medicine core layer prepared in the step two on the surface of an aluminum foil, axially placing an aluminum strip on the medicine core layer, and then winding the aluminum foil into a cylindrical shape to enable a wrapping layer to tightly wrap the medicine core layer;
step four: preparing an external coil steel layer, namely firstly, removing oil, dust and water from cold-rolled coil steel, performing brightening treatment on the surface of the cold-rolled coil steel, and then rolling a U-shaped groove on the cold-rolled coil steel;
step five: placing the preformed semi-finished product of the flux-cored wire body in the third step inside a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer and the external coil steel, and then rolling and seaming the external coil steel to prepare a flux-cored wire rough blank with an O-shaped section;
step six: placing the preformed semi-finished product of the flux-cored wire body in the third step inside a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer and the external coil steel, and then rolling and seaming the external coil steel to prepare a cylindrical rough blank;
step seven: and drawing the cylindrical rough blank prepared in the sixth step into wires, preparing a finished product of the flux-cored wire body, and packaging and warehousing the finished product.
Preferably, the heating temperature in the second step is set to be 100-110 ℃, and the stirring time is set to be 30-45 min.
Preferably, the specific process for rolling the U-shaped groove by cold rolling the coil steel in the fourth step is as follows:
s1: rolling the cold-rolled coil steel sheet into a U-shaped groove with the front side facing upwards;
s2: the front side of the cold-rolled coil steel sheet faces downwards, and the cold-rolled coil steel sheet is rolled by using flat rolling equipment again;
s3: the cold rolled steel sheet is rolled into a U-shaped groove with the reverse side facing upwards;
s4: and (4) rolling the reverse side of the steel plate towards the U-shaped groove, and then carrying out isothermal quenching treatment on the steel plate.
Preferably, the finished product of the flux-cored wire body drawn into the wire in the seventh step is quickly introduced into anti-rust oil to hang oil, and the finished product is wiped when being led out.
In the technical scheme, the invention provides the following technical effects and advantages:
1. the integral welding performance of the welding wire is improved through the formula, the number of air holes on the surface of the welding layer is reduced, the interfusion among mixed alloys is strong, the welding strength is improved, and the optimal welding process performance is ensured;
2. by the processing technology of the self-protection flux-cored wire provided by the invention, all processes can be combined after being prefabricated and carried out by labor, the production efficiency can be greatly improved, the production cost is reduced, the produced self-protection flux-cored wire can be normally used after being placed for a long time, unnecessary resource waste is avoided, and the processing technology is convenient to popularize and use.
Drawings
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
FIG. 1 is an overall cross-sectional view of the body of the flux-cored welding wire of the present invention;
FIG. 2 is a cross-sectional view of the O-shaped flux-cored wire rough blank of the present invention before seaming.
Description of reference numerals:
1 flux-cored wire body, 2 aluminum strips, 3 flux-cored layers, 4 wrapping layers, 5 isolating layers and 6 external steel rolling layers.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
Example 1:
the invention provides a self-protection flux-cored wire formula shown in figures 1-2, which comprises a flux-cored wire body 1, wherein the flux-cored wire body 1 is made of an aluminum strip 2, a flux-cored layer 3, a wrapping layer 4, an isolating layer 5 and an external steel rolling layer 6, the aluminum strip 2, the flux-cored layer 3, the wrapping layer 4, the isolating layer 5 and the external steel rolling layer 6 are coaxially distributed, and the aluminum strip 2, the flux-cored layer 3, the wrapping layer 4, the isolating layer 5 and the external steel rolling layer 6 are sequentially wrapped from inside to outside;
the medicine core layer 3 comprises the following main materials in parts by weight: 10 parts of rutile powder, 8 parts of anorthite powder, 5 parts of dolomite powder, 6 parts of aluminum magnesium alloy powder, 3 parts of fluoride, 3 parts of molybdenum powder, 1 part of zirconium powder, 4 parts of silicon nitride, 5 parts of electrolytic manganese, 4 parts of iron powder, 2 parts of rare earth and 2 parts of rare metal;
the diameter ratio between the aluminum strip 2 and the medicine core layer 3 is set as 1: 8, the thickness of the outer steel coil layer 6 is set to be 0.02mm, and the thickness of the spacer is set to be 0.5 mm.
Further, in the above technical solution, the wrapping layer 4 is made of a tin foil material.
Further, in the above technical solution, the outer steel coil layer 6 is made of cold rolled steel coil, and the cold rolled steel coil is initially provided with a U-shaped cross section.
Further, in the above technical solution, the isolation layer 5 is made of zeolite powder, and the average particle size of the zeolite powder is set to 80 mesh.
A processing technology of a self-protection flux-cored wire comprises the following specific operation steps:
the method comprises the following steps: preparing and pretreating raw materials, preparing rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal according to a proportion, respectively drying, and preparing tin foil, cold-rolled coil steel and zeolite powder;
step two: preparing a medicine core layer 3, mixing dried rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal, screening large-particle impurities, adding the mixture into a stirrer, heating and stirring, introducing nitrogen in the heating process, uniformly stirring, taking out, carrying out vacuum cooling, setting the heating temperature at 100 ℃, and setting the stirring time at 30 min;
step three: pre-forming a flux-cored wire body 1, paving the medicine core layer 3 prepared in the step two on the surface of an aluminum foil, axially placing an aluminum strip 2 on the medicine core layer 3, and then winding the aluminum foil into a cylindrical shape to enable a wrapping layer 4 to tightly wrap the medicine core layer 3;
step four: preparing an external coil steel layer 6, firstly, removing oil, dust and water from cold-rolled coil steel, performing brightening treatment on the surface of the cold-rolled coil steel, and then rolling a U-shaped groove on the cold-rolled coil steel;
the specific process for rolling the U-shaped groove is as follows:
s1: rolling the cold-rolled coil steel sheet into a U-shaped groove with the front side facing upwards;
s2: the front side of the cold-rolled coil steel sheet faces downwards, and the cold-rolled coil steel sheet is rolled by using flat rolling equipment again;
s3: the cold rolled steel sheet is rolled into a U-shaped groove with the reverse side facing upwards;
s4: the reverse side is rolled towards the U-shaped groove and then is subjected to isothermal quenching treatment;
step five: placing the semi-finished product of the flux-cored wire body 1 preformed in the third step inside a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer 4 and the external coil steel, and then rolling and seaming the external coil steel to prepare a flux-cored wire rough blank with an O-shaped section;
step six: placing the preformed semi-finished product of the flux-cored wire body 1 in the third step inside a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer 4 and the external coil steel, and then rolling and seaming the external coil steel to prepare a cylindrical rough blank;
step seven: drawing the cylindrical rough blank prepared in the sixth step into a wire, quickly introducing the finished product of the flux-cored wire body 1 drawn into the rust preventive oil for internal oil hanging, wiping the finished product when the finished product is led out, preparing the finished product of the flux-cored wire body 1, and packaging and warehousing the finished product.
The self-protection flux-cored wire prepared in the embodiment has the advantages of good tensile resistance, strong ductility and good joint sealing performance, is not easy to damage in a wire drawing process, and is better stored compared with the existing like products, in addition, the finished product of the flux-cored wire body 1 prepared in the embodiment is tested for the tensile resistance and the welding effect, and the result shows that: the yield strength of the self-protection flux-cored wire is 415Mpa, the elongation is 50%, the welding slag detachability of the solder is good during welding, the molten drop of the solder is small, the welding is uniform, the welding strength can be ensured, and the solder is slightly splashed during welding.
Example 2:
the invention provides a self-protection flux-cored wire formula shown in figures 1-2, which comprises a flux-cored wire body 1, wherein the flux-cored wire body 1 is made of an aluminum strip 2, a flux-cored layer 3, a wrapping layer 4, an isolating layer 5 and an external steel rolling layer 6, the aluminum strip 2, the flux-cored layer 3, the wrapping layer 4, the isolating layer 5 and the external steel rolling layer 6 are coaxially distributed, and the aluminum strip 2, the flux-cored layer 3, the wrapping layer 4, the isolating layer 5 and the external steel rolling layer 6 are sequentially wrapped from inside to outside;
the medicine core layer 3 comprises the following main materials in parts by weight: 15 parts of rutile powder, 12 parts of calcium feldspar powder, 6 parts of dolomite powder, 8 parts of aluminum magnesium alloy powder, 3.5 parts of fluoride, 3.5 parts of molybdenum powder, 1.5 parts of zirconium powder, 5 parts of silicon nitride, 6 parts of electrolytic manganese, 6 parts of iron powder, 4 parts of rare earth and 3 parts of rare metal;
the diameter ratio between the aluminum strip 2 and the medicine core layer 3 is set as 1: 9, the thickness of the outer coil steel layer 6 is set to be 0.03mm, and the thickness of the spacer is set to be 0.8 mm.
Further, in the above technical solution, the wrapping layer 4 is made of a tin foil material.
Further, in the above technical solution, the outer steel coil layer 6 is made of cold rolled steel coil, and the cold rolled steel coil is initially provided with a U-shaped cross section.
Further, in the above technical solution, the isolation layer 5 is made of zeolite powder, and the average particle size of the zeolite powder is set to 80 mesh.
A processing technology of a self-protection flux-cored wire comprises the following specific operation steps:
the method comprises the following steps: preparing and pretreating raw materials, preparing rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal according to a proportion, respectively drying, and preparing tin foil, cold-rolled coil steel and zeolite powder;
step two: preparing a medicine core layer 3, mixing dried rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal, screening large-particle impurities, adding the mixture into a stirrer, heating and stirring, introducing nitrogen in the heating process, uniformly stirring, taking out, carrying out vacuum cooling, setting the heating temperature to be 105 ℃, and setting the stirring time to be 40 min;
step three: pre-forming a flux-cored wire body 1, paving the medicine core layer 3 prepared in the step two on the surface of an aluminum foil, axially placing an aluminum strip 2 on the medicine core layer 3, and then winding the aluminum foil into a cylindrical shape to enable a wrapping layer 4 to tightly wrap the medicine core layer 3;
step four: preparing an external coil steel layer 6, firstly, removing oil, dust and water from cold-rolled coil steel, performing brightening treatment on the surface of the cold-rolled coil steel, and then rolling a U-shaped groove on the cold-rolled coil steel;
the specific process for rolling the U-shaped groove is as follows:
s1: rolling the cold-rolled coil steel sheet into a U-shaped groove with the front side facing upwards;
s2: the front side of the cold-rolled coil steel sheet faces downwards, and the cold-rolled coil steel sheet is rolled by using flat rolling equipment again;
s3: the cold rolled steel sheet is rolled into a U-shaped groove with the reverse side facing upwards;
s4: the reverse side is rolled towards the U-shaped groove and then is subjected to isothermal quenching treatment;
step five: placing the semi-finished product of the flux-cored wire body 1 preformed in the third step inside a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer 4 and the external coil steel, and then rolling and seaming the external coil steel to prepare a flux-cored wire rough blank with an O-shaped section;
step six: placing the preformed semi-finished product of the flux-cored wire body 1 in the third step inside a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer 4 and the external coil steel, and then rolling and seaming the external coil steel to prepare a cylindrical rough blank;
step seven: drawing the cylindrical rough blank prepared in the sixth step into a wire, quickly introducing the finished product of the flux-cored wire body 1 drawn into the rust preventive oil for internal oil hanging, wiping the finished product when the finished product is led out, preparing the finished product of the flux-cored wire body 1, and packaging and warehousing the finished product.
Comparative example 1, the self-shielded flux-cored wire prepared in this embodiment, tensile resistance is good, ductility is strong, and the joint close nature is good, in the technology of drawing a wire, is difficult damaged, and compares in the better storage of present like product, and the flux-cored wire body 1 finished product of preparing in this embodiment carries out tensile resistance and welding effect test in addition, and the result shows: the yield strength of the self-protection flux-cored wire is 420Mpa, the elongation is 52%, the welding slag detachability of the solder during welding is good, the molten drop of the solder is small, the welding is uniform, the welding strength can be ensured, the solder splash is small during welding, and the overall welding effect is better than that of the embodiment 1.
Example 3:
the invention provides a self-protection flux-cored wire formula shown in figures 1-2, which comprises a flux-cored wire body 1, wherein the flux-cored wire body 1 is made of an aluminum strip 2, a flux-cored layer 3, a wrapping layer 4, an isolating layer 5 and an external steel rolling layer 6, the aluminum strip 2, the flux-cored layer 3, the wrapping layer 4, the isolating layer 5 and the external steel rolling layer 6 are coaxially distributed, and the aluminum strip 2, the flux-cored layer 3, the wrapping layer 4, the isolating layer 5 and the external steel rolling layer 6 are sequentially wrapped from inside to outside;
the medicine core layer 3 comprises the following main materials in parts by weight: 20 parts of rutile powder, 15 parts of anorthite powder, 7 parts of dolomite powder, 10 parts of aluminum magnesium alloy powder, 4 parts of fluoride, 4 parts of molybdenum powder, 2 parts of zirconium powder, 7 parts of silicon nitride, 8 parts of electrolytic manganese, 8 parts of iron powder, 5 parts of rare earth and 5 parts of rare metal;
the diameter ratio between the aluminum strip 2 and the medicine core layer 3 is set as 1: 10, the thickness of the outer steel coil layer 6 is set to be 0.04mm, and the thickness of the spacer is set to be 1 mm.
Further, in the above technical solution, the wrapping layer 4 is made of a tin foil material.
Further, in the above technical solution, the outer steel coil layer 6 is made of cold rolled steel coil, and the cold rolled steel coil is initially provided with a U-shaped cross section.
Further, in the above technical solution, the isolation layer 5 is made of zeolite powder, and the average particle size of the zeolite powder is set to 80 mesh.
A processing technology of a self-protection flux-cored wire comprises the following specific operation steps:
the method comprises the following steps: preparing and pretreating raw materials, preparing rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal according to a proportion, respectively drying, and preparing tin foil, cold-rolled coil steel and zeolite powder;
step two: preparing a medicine core layer 3, mixing dried rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal, screening large-particle impurities, adding the mixture into a stirrer, heating and stirring, introducing nitrogen in the heating process, uniformly stirring, taking out, vacuum-cooling, setting the heating temperature at 110 ℃, and setting the stirring time at 45 min;
step three: pre-forming a flux-cored wire body 1, paving the medicine core layer 3 prepared in the step two on the surface of an aluminum foil, axially placing an aluminum strip 2 on the medicine core layer 3, and then winding the aluminum foil into a cylindrical shape to enable a wrapping layer 4 to tightly wrap the medicine core layer 3;
step four: preparing an external coil steel layer 6, firstly, removing oil, dust and water from cold-rolled coil steel, performing brightening treatment on the surface of the cold-rolled coil steel, and then rolling a U-shaped groove on the cold-rolled coil steel;
the specific process for rolling the U-shaped groove is as follows:
s1: rolling the cold-rolled coil steel sheet into a U-shaped groove with the front side facing upwards;
s2: the front side of the cold-rolled coil steel sheet faces downwards, and the cold-rolled coil steel sheet is rolled by using flat rolling equipment again;
s3: the cold rolled steel sheet is rolled into a U-shaped groove with the reverse side facing upwards;
s4: the reverse side is rolled towards the U-shaped groove and then is subjected to isothermal quenching treatment;
step five: placing the semi-finished product of the flux-cored wire body 1 preformed in the third step inside a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer 4 and the external coil steel, and then rolling and seaming the external coil steel to prepare a flux-cored wire rough blank with an O-shaped section;
step six: placing the preformed semi-finished product of the flux-cored wire body 1 in the third step inside a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer 4 and the external coil steel, and then rolling and seaming the external coil steel to prepare a cylindrical rough blank;
step seven: drawing the cylindrical rough blank prepared in the sixth step into a wire, quickly introducing the finished product of the flux-cored wire body 1 drawn into the rust preventive oil for internal oil hanging, wiping the finished product when the finished product is led out, preparing the finished product of the flux-cored wire body 1, and packaging and warehousing the finished product.
Comparing embodiment 1 and 2, the self-protection flux-cored wire of preparation in this embodiment, stretch-proofing ability is good, and ductility is strong, and the seam closure is good, in the technology of drawing a wire, is difficult damaged, and compares in the better storage of current like product, and stretch-proofing ability and welding effect test are carried out to the flux-cored wire body 1 finished product of preparation in this embodiment in addition, and the result shows: the yield strength of the self-shielded flux-cored wire is 416Mpa, the elongation is 51%, the welding slag detachability of the solder during welding is good, the molten drop of the solder is slightly large, the welding is uniform, the welding strength can be ensured, the solder splash is small during welding, and the overall welding effect is better than that of the embodiment 1 and slightly worse than that of the embodiment 2.
The following table is obtained according to examples 1 to 3:
from the above, it can be seen that in example 2, the raw material proportion is moderate, the processing temperature is moderate, and the processing and preparation are easy to be most suitable for the processing and popularization of the self-shielded flux-cored wire, and the process of this example can make the whole wire reach the optimum level, in this technical scheme, the chemical core layer 3 is prepared by combining rutile powder, calamine powder, dolomite powder, aluminum-magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal, the number of pores on the surface of the welding layer is reduced, the fusibility between the mixed alloys is strong, the welding strength is improved, the welding process performance is guaranteed to be optimum, the embedded and sleeved structure of the aluminum strip, the chemical core layer, the wrapping layer, the isolation layer and the outer coil steel layer of the flux-cored wire body 1 is arranged, the processing process of the self-shielded flux-cored wire is matched, the flux-cored wire, the cold-rolled coil steel rolls a U-shaped groove and is subjected to isothermal quenching treatment, the ductility and toughness of the external coil steel layer 6 are improved, the tensile property and yield strength of the flux-cored wire body (1) are improved by matching with the aluminum strips 2, the flux-cored wire is not damaged, the zeolite powder is used as an isolation layer, the oxidation resistance and the dryness of the flux-cored layer 3 are improved by the aid of the wrapping layer 4 of the tin foil while heat conduction is facilitated, normal use after long-time placement is guaranteed, and unnecessary resource waste is avoided.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive, and any modifications, equivalents, improvements and the like that come within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. A self-protection flux-cored wire formula comprises a flux-cored wire body (1) and is characterized in that: the flux-cored wire body (1) is made of an aluminum strip (2), a flux core layer (3), a wrapping layer (4), an isolation layer (5) and an external steel rolling layer (6), wherein the aluminum strip (2), the flux core layer (3), the wrapping layer (4), the isolation layer (5) and the external steel rolling layer (6) are coaxially distributed, and the aluminum strip (2), the flux core layer (3), the wrapping layer (4), the isolation layer (5) and the external steel rolling layer (6) are sequentially wrapped from inside to outside;
the medicine core layer (3) comprises the following main materials in parts by weight: 10-20 parts of rutile powder, 8-15 parts of anorthite powder, 5-7 parts of dolomite powder, 6-10 parts of aluminum magnesium alloy powder, 3-4 parts of fluoride, 3-4 parts of molybdenum powder, 1-2 parts of zirconium powder, 4-7 parts of silicon nitride, 5-8 parts of electrolytic manganese, 4-8 parts of iron powder, 2-5 parts of rare earth and 2-5 parts of rare metal;
the diameter ratio between the aluminum strip (2) and the medicine core layer (3) is set as 1: 8-10, the thickness of the outer steel coil layer (6) is set to be 0.02-0.04mm, and the thickness of the separator is set to be 0.5-1 mm.
2. The formulation of a self-shielding flux-cored wire of claim 1, wherein: the wrapping layer (4) is made of tin foil materials.
3. The formulation of a self-shielding flux-cored wire of claim 1, wherein: the outer steel coil layer (6) is made of cold rolled coil steel, and the initial section of the cold rolled coil steel is U-shaped.
4. The formulation of a self-shielding flux-cored wire of claim 1, wherein: the isolation layer (5) is made of zeolite powder, and the average particle size of the zeolite powder is set to be 80 meshes.
5. The process for manufacturing a self-shielded flux-cored welding wire according to any one of claims 1 to 4, wherein: the specific operation steps are as follows:
the method comprises the following steps: preparing and pretreating raw materials, preparing rutile powder, anorthite powder, dolomite powder, aluminum magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal according to a proportion, respectively drying, and preparing tin foil, cold-rolled coil steel and zeolite powder;
step two: preparing a medicine core layer (3), mixing dried rutile powder, anorthite powder, dolomite powder, aluminum-magnesium alloy powder, fluoride, molybdenum powder, zirconium powder, silicon nitride, electrolytic manganese, iron powder, rare earth and rare metal, screening large-particle impurities, adding the mixture into a stirrer, heating and stirring, introducing nitrogen during heating, uniformly stirring, taking out, and performing vacuum cooling;
step three: pre-forming a flux-cored wire body (1), paving the flux-cored layer (3) prepared in the step two on the surface of an aluminum foil, axially placing an aluminum strip (2) on the flux-cored layer (3), and then winding the aluminum foil into a cylindrical shape to enable a wrapping layer (4) to tightly wrap the flux-cored layer (3);
step four: preparing an external coil steel layer (6), firstly removing oil, dust and water from cold-rolled coil steel, performing brightening treatment on the surface of the cold-rolled coil steel, and then rolling a U-shaped groove on the cold-rolled coil steel;
step five: placing the semi-finished product of the flux-cored wire body (1) preformed in the third step into a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer (4) and the external coil steel, and then rolling and seaming the external coil steel to prepare a flux-cored wire rough blank with an O-shaped section;
step six: placing the semi-finished product of the flux-cored wire body (1) preformed in the third step into a U-shaped groove, slowly adding zeolite powder to uniformly fill the zeolite powder between the wrapping layer (4) and the external coil steel, and then rolling and seaming the external coil steel to prepare a cylindrical rough blank;
step seven: drawing the cylindrical rough blank prepared in the sixth step into wires, preparing a finished product of the flux-cored wire body (1), and packaging and warehousing the finished product.
6. The process of claim 5, wherein the self-shielded flux-cored wire comprises: in the second step, the heating temperature is set to be 100-110 ℃, and the stirring time is set to be 30-45 min.
7. The process of claim 5, wherein the self-shielded flux-cored wire comprises: the specific process for rolling the U-shaped groove by cold rolling the coil steel in the fourth step is as follows:
s1: rolling the cold-rolled coil steel sheet into a U-shaped groove with the front side facing upwards;
s2: the front side of the cold-rolled coil steel sheet faces downwards, and the cold-rolled coil steel sheet is rolled by using flat rolling equipment again;
s3: the cold rolled steel sheet is rolled into a U-shaped groove with the reverse side facing upwards;
s4: and (4) rolling the reverse side of the steel plate towards the U-shaped groove, and then carrying out isothermal quenching treatment on the steel plate.
8. The process of claim 5, wherein the self-shielded flux-cored wire comprises: and seventhly, rapidly introducing rust preventive oil into the finished product of the flux-cored wire body (1) drawn into the wire in the step seven, and wiping the finished product when the finished product is led out.
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