CN104139250B - A kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method - Google Patents
A kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method Download PDFInfo
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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
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/3066—Fe as the principal constituent with Ni as next major constituent
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- 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
- B23K35/3603—Halide salts
- B23K35/3605—Fluorides
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- 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
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- 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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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The present invention provides a kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method, and the intensity of welding wire is 600MPa level, and taking SPCC-SD cold-rolled low carbon steel steel band as welding wire raw material, the formula of welding wire medicine core is by fluorochemical; Carbonate; Oxide compound; Iron alloy powder; Metal powder forms. Preparation method comprises baking, joins powder, cut out band, filling molding, drawing, layer is around, packaging and other steps. The positively effect of the present invention: the 600MPa grade high-strength high-tenacity electro-gas (enclosed) welding flux-cored wire of the present invention, weldprocedure is good, arc stability, splashing are little, easily de-slag, formation of weld be attractive in appearance ,-40 DEG C of low temperature impact properties excellences. It is mainly used in the welding of 100,000 cubes of petroleum storage tank longitudinal joints.
Description
Technical field
The invention belongs to welding material technology of preparing, especially relate to a kind of grade high-strength high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method, its intensity is 600MPa level.
Background technology
At present, China's economy is in the high speed development stage, and to the demand rapid development of the energy, country increases input for the construction of oil reserve, and China's oil storage tank just develops to maximization, clustered direction. The building technology of 100000 cubes of petroleum storage tanks also improves thereupon, automatic welding technique replaces manual welding gradually, it is widely used in petroleum storage tank welding, especially the successful Application of electro-gas (enclosed) welding technology in 100,000 cubes of petroleum storage tanks are built, substantially increase welding quality and welding efficiency, and reduce the labour intensity of welder.
At present, the high-strength hardened and tempered steel plate SPV490Q of the material of main part that China's 100,000 cubes of petroleum storage tanks use mainly Japan's import, electro-gas (enclosed) welding welding material supporting with it is Japan's import equally, and the electro-gas (enclosed) welding welding wire trade mark wherein having company of Nippon Steel to produce is the electro-gas (enclosed) welding welding wire trade mark that EG-60 or company of Kobe Steel produce is DW-S1LG. Japan welding material procurement cycle length, purchase cost height, make Chinese large-sized petroleum storage tank construction cost improve.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method, and this welding wire intensity reaches 600MPa level, and supporting steel plate SPV490Q uses, and meets the construction demand of 100,000 cubes of petroleum storage tanks.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire, welding wire medicine core is prepared from by the raw material of following weight part number: fluorochemical 30-60 part carbonate 10-30 part, silicon-dioxide 0-10 part, titanium dioxide 0-10 part, potassium oxide 0-10 part, sodium oxide 0-10 part, magnesium oxide 0-10 part, calcium oxide 0-10 part, silicomanganese 40-80 part, electrolytic manganese 10-40 part, ferrosilicon 10-40 part, aluminum magnesium alloy 5-10 part, magnesium powder 5-10 part, molybdenum-iron 10-20 part, nickel powder 50-100 part, ferrotianium 10-40, ferro-boron 1-5 part, iron powder 600-750 part.
Preferably, described fluorochemical is one or more mixtures in Calcium Fluoride (Fluorspan), Sodium Fluoride and barium fluoride.
Preferably, described carbonate is one or more mixtures in calcium carbonate, magnesiumcarbonate, barium carbonate.
Preferably, the model of described silicomanganese is FeMn64Si23 or FeMn62Si23; The model of described ferrosilicon is FeSi75; The aluminium magnesium ratio of described aluminum magnesium alloy is 1:1; The model of described molybdenum-iron is FeMo60; The model of described ferrotianium is FeTi30 or FeTi40; The model of described ferro-boron is FeB22 or FeB23. .
Preferably, the weight percent that this several material total amount of fluorochemical, carbonate, silicon-dioxide, titanium dioxide, potassium oxide, sodium oxide, magnesium oxide and calcium oxide accounts for medicinal powder total amount is 5%��15%.
The welding direction of electro-gas (enclosed) welding weldprocedure is vertically upward, and electric arc can act on above molten bath all the time, and the slag amount in molten bath is extremely important, and the welding slag that welding wire should be kept to generate slag amount and weld face formation keeps balance. It is too much that welding wire generates welding slag, weld pool surface welding slag can be made more long-pending more many, affect arc stability, and the defect such as lack of fusion, folder slag; It is very few that welding wire generates welding slag, weld face welding slag can be made to cover incomplete, affect formation of weld. Therefore, in electro-gas (enclosed) welding flux-cored wire, the concrete material selection of slag former and the total amount of slag former all have a great impact for weldprocedure and welding property, keep the balance of slag growing amount and output extremely important.
Preferably, taking SPCC-SD cold-rolled low carbon steel steel band as welding stick original material material.
Formulation analysis in the present invention: high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire provided by the invention, intensity is 600MPa level, is mainly used in the welding of 100,000 cubes of petroleum storage tank longitudinal joints. This welding wire uses steel band to be plain carbon stool steel band SPCC-SD. The effect adding various medicinal powder is as follows:
Fluorochemical is main slag former, and high-strength steel welding wire must add alloying element and improve intensity, and more alloying element can improve viscosity coefficient of dross, and fluorochemical can play shoddye effect, is conducive to welding slag to get rid of, covers weld face.
Carbonate is slag former, main improved effect viscosity coefficient of dross, decomposes the CO generated2Play the effect in protection molten bath.
Oxide compound is slag former, and main improved effect viscosity coefficient of dross, stablizes electric arc, and optimize welding line is shaped, and improves weld seam deslag performance.
Silicomanganese, ferrosilicon and electrolytic manganese, as major alloy agent to deposited metal transition alloy elements, it is to increase metal strength, and as reductor, play the effect of purification molten bath.
Aluminum magnesium alloy, magnesium powder are reductor, play the effect of purification molten bath, and protect effective alloying element to molten bath transition.
Molybdenum-iron, nickel powder, ferrotianium, ferro-boron acting in conjunction mainly play crystal grain thinning and improve low temperature impact properties.
Present invention also offers a kind of method preparing high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire as above, comprise following preparation process:
(1), toast: fluorochemical, carbonate, silicon-dioxide, titanium dioxide, potassium oxide, sodium oxide, magnesium oxide, calcium oxide are first toasted before powder is joined in mixing in high bake equipment;
(2), powder is joined: the medicine core powder handled well in above-mentioned steps (1) and other powder are mixed in mixed powder equipment;
(3), band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4), filling molding: joining in U-type groove by powder conveyer by medicinal powder, it is 22-26% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
Preferably, in step (1), storing temperature is 380��420 DEG C.
Preferably, in step (2), mixing time is 2��3 hours.
The advantage that the invention has and positively effect be: adopts the high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire that the formula of the present invention and preparation method obtain, employing CO2As shielding gas, weldprocedure is good, arc stability, splashing are little, easily de-slag, formation of weld be attractive in appearance ,-40 DEG C of low temperature impact properties excellences, it is possible to meet the welding of 100,000 cubes of petroleum storage tank longitudinal joints.
Embodiment
Below in conjunction with specific embodiment, the present invention will be described in detail.
Embodiment one
A preparation method for high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire, intensity is 600MPa level, comprises following processing step:
(1) toast: first the Calcium Fluoride (Fluorspan) 20 parts of Sodium Fluorides 10 parts taken, barium fluoride 5 parts, 10 parts, calcium carbonate, 7 parts, magnesiumcarbonate, barium carbonate 4 parts, silicon-dioxide 8 parts, potassium oxide 5 parts, titanium dioxide 4 parts, sodium oxide 2 parts, 2 parts, magnesium oxide, 8 parts, calcium oxide being toasted in high bake equipment, storing temperature is 420 DEG C;
(2) powder is joined: take silicomanganese 50 parts, its model is FeMn64Si23, electrolytic manganese 20 parts, ferrosilicon 30 parts, its model is FeSi75, aluminum magnesium alloy 5 parts, its aluminium magnesium ratio is 1:1,5 parts, magnesium powder, molybdenum-iron 20 parts, and its model is FeMo60, nickel powder 60 parts, ferrotianium 30 parts, and its model is FeTi30, ferro-boron 4 parts, its model is FeB22, iron powder 676 parts, mixes the above-mentioned medicine core powder prepared in mixed powder equipment, and mixing time is 2 hours;
(3) band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4) filling molding: medicinal powder is joined in U-type groove by powder conveyer, it is 22% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
Adopt the SPV490Q steel plate of long 500mm, wide 200mm, thick 20mm, groove angle 35 degree, root opening 5mm, the back side adopts electro-gas (enclosed) welding dedicated ceramic liner, carry out deposited metal test specimen welding, welding wire deposited metal composition detects, and its weight percent is carbon 0.06%, manganese 1.75%, silicon 0.32%, nickel 0.98%, molybdenum 0.19%, titanium 0.05%, boron 0.0035% surplus is iron. Tensile strength is 672MPa, unit elongation 23%, and-40 DEG C of impact properties are average 126J.
Embodiment two:
A kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method, intensity is 600MPa level, comprises following step:
(1) toast: first the Calcium Fluoride (Fluorspan) 10 parts of Sodium Fluorides 30 parts taken, barium fluoride 5 parts, 5 parts, calcium carbonate, 10 parts, magnesiumcarbonate, barium carbonate 5 parts, silicon-dioxide 3 parts, titanium dioxide 2 parts, potassium oxide 10 parts, sodium oxide 7 parts, 3 parts, magnesium oxide being toasted in high bake equipment, storing temperature is 380 DEG C;
(2) powder is joined: take silicomanganese 80 parts, its model is FeMn62Si23, electrolytic manganese 10 parts, ferrosilicon 10 parts, its model is FeSi75, aluminum magnesium alloy 15 parts, its aluminium magnesium ratio is 1:1,10 parts, magnesium powder, molybdenum-iron 10 parts, its model is FeMo60, nickel powder 50 parts, ferrotianium 10 parts, and its model is FeTi40, ferro-boron 1 part, and its model is FeB23, iron powder 724 parts, being mixed in mixed powder equipment by the above-mentioned medicine core powder prepared, mixing time is 3 hours;
(3) band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4) filling molding: medicinal powder is joined in U-type groove by powder conveyer, it is 22% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
Adopt the SPV490Q steel plate of long 500mm, wide 200mm, thick 20mm, groove angle 35 degree, root opening 5mm, the back side adopts electro-gas (enclosed) welding dedicated ceramic liner, carry out deposited metal test specimen welding, welding wire deposited metal composition detects, and its weight percent is carbon 0.09%, manganese 1.58%, silicon 0.22%, nickel 0.85%, molybdenum 0.11%, titanium 0.02%, boron 0.0008% surplus is iron. Tensile strength is 645MPa, unit elongation 25%, and-40 DEG C of impact properties are average 147J.
Embodiment three:
A kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method, intensity is 600MPa level, comprises following processing step:
(1) toast: first the Calcium Fluoride (Fluorspan) 30 parts of Sodium Fluorides 10 parts taken, 10 parts, calcium carbonate, 5 parts, magnesiumcarbonate, silicon-dioxide 5 parts, sodium oxide 3 parts, magnesium oxide 5,2 parts, calcium oxide being toasted in high bake equipment, storing temperature is 400 DEG C;
(2) powder is joined: take silicomanganese 60 parts, its model is FeMn64Si23, electrolytic manganese 30 parts, ferrosilicon 15 parts, its model is FeSi75, aluminum magnesium alloy 7 parts, its aluminium magnesium ratio is 1:1,8 parts, magnesium powder, molybdenum-iron 15 parts, and its model is FeMo60, nickel powder 80 parts, ferrotianium 25 parts, and its model is FeTi30, ferro-boron 3 parts, its model is FeB22, iron powder 687 parts, mixes the above-mentioned medicine core powder prepared in mixed powder equipment, and mixing time is 2.5 hours;
(3) band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4) filling molding: medicinal powder is joined in U-type groove by powder conveyer, it is 24% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
Adopt the SPV490Q steel plate of long 500mm, wide 200mm, thick 20mm, groove angle 35 degree, root opening 5mm, the back side adopts electro-gas (enclosed) welding dedicated ceramic liner, carry out deposited metal test specimen welding, welding wire deposited metal composition detects, and its weight percent is carbon 0.08%, manganese 1.63%, silicon 0.25%, nickel 1.30%, molybdenum 0.15%, titanium 0.04%, boron 0.0023% surplus is iron. Tensile strength is 658MPa, unit elongation 25%, and-40 DEG C of impact properties are average 143J.
Embodiment four
A kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method, intensity is 600MPa level, comprises following processing step:
(1) toast: first the Calcium Fluoride (Fluorspan) 40 parts of Sodium Fluorides 15 parts taken, barium fluoride 5 parts, 5 parts, calcium carbonate, 10 parts, magnesiumcarbonate, silica 10 part, titanium dioxide 10 parts, potassium oxide 5 parts, sodium oxide 10 parts, 10 parts, magnesium oxide being toasted in high bake equipment, storing temperature is 380 DEG C;
(2) powder is joined: take silicomanganese 40 parts, its model is FeMn62Si23, electrolytic manganese 40 parts, ferrosilicon 30 parts, its model is FeSi75, aluminum magnesium alloy 10 parts, its aluminium magnesium ratio is 1:1,5 parts, magnesium powder, molybdenum-iron 10 parts, its model is FeMo60, nickel powder 100 parts, ferrotianium 40 parts, and its model is FeTi40, ferro-boron 2 parts, and its model is FeB23, iron powder 603 parts, being mixed in mixed powder equipment by the above-mentioned medicine core powder prepared, mixing time is 3 hours;
(3) band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4) filling molding: medicinal powder is joined in U-type groove by powder conveyer, it is 24% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
Adopt the SPV490Q steel plate of long 500mm, wide 200mm, thick 20mm, groove angle 35 degree, root opening 5mm, the back side adopts electro-gas (enclosed) welding dedicated ceramic liner, carry out deposited metal test specimen welding, welding wire deposited metal composition detects, and its weight percent is carbon 0.05%, manganese 1.61%, silicon 0.23%, nickel 1.63%, molybdenum 0.09%, titanium 0.06%, boron 0.0019% surplus is iron. Tensile strength is 667MPa, unit elongation 26%, and-40 DEG C of impact properties are average 156J.
Embodiment five
A kind of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire and preparation method, intensity is 600MPa level, comprises following processing step:
(1) toast: first the Calcium Fluoride (Fluorspan) 20 parts of Sodium Fluorides 30 parts taken, 20 parts, calcium carbonate, 5 parts, magnesiumcarbonate, barium carbonate 5 parts, silicon-dioxide 2 parts, potassium oxide 3 parts, sodium oxide 5 parts, calcium oxide 10 being toasted in high bake equipment, storing temperature is 420 DEG C;
(2) powder is joined: take silicomanganese 70 parts, its model is FeMn64Si23, electrolytic manganese 20 parts, ferrosilicon 10 parts, its model is FeSi75, aluminum magnesium alloy 5 parts, its aluminium magnesium ratio is 1:1,10 parts, magnesium powder, molybdenum-iron 20 parts, and its model is FeMo60, nickel powder 90 parts, ferrotianium 20 parts, and its model is FeTi30, ferro-boron 5 parts, its model is FeB22, iron powder 650 parts, mixes the above-mentioned medicine core powder prepared in mixed powder equipment, and mixing time is 2 hours;
(3) band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4) filling molding: medicinal powder is joined in U-type groove by powder conveyer, it is 26% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
Adopt the SPV490Q steel plate of long 500mm, wide 200mm, thick 20mm, groove angle 35 degree, root opening 5mm, the back side adopts electro-gas (enclosed) welding dedicated ceramic liner, carry out deposited metal test specimen welding, welding wire deposited metal composition detects, and its weight percent is carbon 0.09%, manganese 1.66%, silicon 0.27%, nickel 1.48%, molybdenum 0.22%, titanium 0.03%, boron 0.0042% surplus is iron. Tensile strength is 673MPa, unit elongation 24%, and-40 DEG C of impact properties are average 151J.
Comparative example one
A kind of electro-gas (enclosed) welding flux-cored wire and preparation method, comprise following processing step:
(1) toast: first the Calcium Fluoride (Fluorspan) 50 parts of Sodium Fluorides 20 parts taken, barium fluoride 10 parts, 20 parts, calcium carbonate, 10 parts, magnesiumcarbonate, barium carbonate 10 parts, silica 15 parts, titanium dioxide 5 parts, potassium oxide 5 parts, sodium oxide 10 parts, 15 parts, magnesium oxide, calcium oxide 10 being toasted in high bake equipment, storing temperature is 400 DEG C;
(2) powder is joined: take silicomanganese 50 parts, its model is FeMn64Si23, electrolytic manganese 30 parts, ferrosilicon 20 parts, its model is FeSi75, aluminum magnesium alloy 5 parts, its aluminium magnesium ratio is 1:1,10 parts, magnesium powder, molybdenum-iron 10 parts, and its model is FeMo60, nickel powder 60 parts, ferrotianium 20 parts, and its model is FeTi30, ferro-boron 2 parts, its model is FeB23, iron powder 613 parts, mixes the above-mentioned medicine core powder prepared in mixed powder equipment, and mixing time is 2.5 hours;
(3) band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4) filling molding: medicinal powder is joined in U-type groove by powder conveyer, it is 24% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
Adopt the SPV490Q steel plate of long 500mm, wide 200mm, thick 20mm, groove angle 35 degree, root opening 5mm, the back side adopts electro-gas (enclosed) welding dedicated ceramic liner, carry out deposited metal test specimen welding, welding wire deposited metal composition detects, and its weight percent is carbon 0.07%, manganese 1.55%, silicon 0.29%, nickel 1.01%, molybdenum 0.11%, titanium 0.03%, boron 0.0018% surplus is iron. Tensile strength is 647MPa, unit elongation 18%, and-40 DEG C of impact properties are average 65J.
Comparative example two
A kind of electro-gas (enclosed) welding flux-cored wire and preparation method, comprise following processing step:
(1) toast: first 5 parts, the Calcium Fluoride (Fluorspan) 20 parts of calcium carbonate taken, silicon-dioxide 5 parts, sodium oxide 5 parts, 5 parts, magnesium oxide being toasted in high bake equipment, storing temperature is 380 DEG C;
(2) powder is joined: take silicomanganese 100 parts, its model is FeMn64Si23, electrolytic manganese 40 parts, ferrosilicon 20 parts, its model is FeSi75, aluminum magnesium alloy 10 parts, the ratio of its aluminium magnesium is 1:1,10 parts, magnesium powder, molybdenum-iron 20 parts, and its model is FeMo60, nickel powder 60 parts, ferrotianium 20 parts, and its model is FeTi40, ferro-boron 5 parts, its model is FeB22, iron powder 675 parts, mixes the above-mentioned medicine core powder prepared in mixed powder equipment, and mixing time is 3 hours;
(3) band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4) filling molding: medicinal powder is joined in U-type groove by powder conveyer, it is 22% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
Adopt the SPV490Q steel plate of long 500mm, wide 200mm, thick 20mm, groove angle 35 degree, root opening 5mm, the back side adopts electro-gas (enclosed) welding dedicated ceramic liner, carry out deposited metal test specimen welding, welding wire deposited metal composition detects, and its weight percent is carbon 0.12%, manganese 2.42%, silicon 0.38%, nickel 1.05%, molybdenum 0.23%, titanium 0.04%, boron 0.0038% surplus is iron. Tensile strength is 762MPa, unit elongation 15%, and-40 DEG C of impact properties are average 28J.
Comparative example 1��2 contrasts with constituent content and the mechanical property of embodiment 1��5:
Experimental analysis:
Comparative example 1 slag former total amount accounts for the 18% of medicinal powder gross weight, owing to slag former is too much, along with the carrying out of welding, slag in molten bath is more long-pending more many, cause electric arc unstable, deposited metal has occurred inclusion, seriously have impact on the unit elongation of deposited metal and impelling strength.
Comparative example 2 slag former total amount accounts for the 4% of medicinal powder gross weight, and owing to slag former is very few, weld face occurs the situation that big area does not have welding slag to cover affecting formation of weld.
Therefore slag former preferable range is that medicinal powder gross weight is 7%��12%.
The 2-in-1 gold element amount of comparative example adds too much, causes tensile strength too high, and beyond the strength range of 600MPa level steel plate, unit elongation and impelling strength to deposited metal make a big impact.
Experimental result: the mechanical performance index of the welding wire in embodiments of the invention 1��5 is all better than comparative example 1��2.
Above the embodiment of the invention is described in detail, but described content is only the better embodiment of the invention, the practical range for limiting the present invention can not be considered to. All equalizations done according to the invention scope change and improvement etc., all should still belong within this patent covering scope.
Claims (8)
1. a high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire, it is characterized in that: welding wire medicine core is prepared from by the raw material of following weight part number: fluorochemical 30-60 part carbonate 10-30 part, silicon-dioxide 0-10 part, titanium dioxide 0-10 part, potassium oxide 0-10 part, sodium oxide 0-10 part, magnesium oxide 0-10 part, calcium oxide 0-10 part, silicomanganese 40-80 part, electrolytic manganese 10-40 part, ferrosilicon 10-40 part, aluminum magnesium alloy 5-10 part, magnesium powder 5-10 part, molybdenum-iron 10-20 part, nickel powder 50-100 part, ferrotianium 10-40, ferro-boron 1-5 part, iron powder 600-750 part, described carbonate is calcium carbonate, magnesiumcarbonate, one or more mixtures in barium carbonate.
2. high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire according to claim 1, it is characterised in that: described fluorochemical is one or more mixtures in Calcium Fluoride (Fluorspan), Sodium Fluoride and barium fluoride.
3. high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire according to claim 1 and 2, it is characterised in that: the model of described silicomanganese is FeMn64Si23 or FeMn62Si23; The model of described ferrosilicon is FeSi75; The aluminium magnesium ratio of described aluminum magnesium alloy is 1:1; The model of described molybdenum-iron is FeMo60; The model of described ferrotianium is FeTi30 or FeTi40; The model of described ferro-boron is FeB22 or FeB23.
4. high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire according to claim 3, it is characterized in that: this several material of fluorochemical, carbonate, silicon-dioxide, titanium dioxide, potassium oxide, sodium oxide, magnesium oxide and calcium oxide composition slag former, it is 5%��15% that the amount of slag former accounts for the weight percent of medicinal powder total amount.
5. high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire according to claim 4, it is characterised in that: taking SPCC-SD cold-rolled low carbon steel steel band as welding stick original material material.
6. prepare the method for the high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire as described in claim 1,2,4 or 5 for one kind, it is characterised in that: comprise following preparation process:
(1), toast: fluorochemical, carbonate, silicon-dioxide, titanium dioxide, potassium oxide, sodium oxide, magnesium oxide, calcium oxide are first toasted before powder is joined in mixing in high bake equipment;
(2), powder is joined: the medicine core powder handled well in above-mentioned steps (1) and other powder are mixed in mixed powder equipment;
(3), band is cut out: select SPCC-SD cold-rolled low carbon steel steel band, cut applicable size, be rolled into " U " type through milling train format roll;
(4), filling molding: joining in U-type groove by powder conveyer by medicinal powder, it is 22-26% that medicinal powder accounts for the mass percent of welding wire;
(5) drawing, layer around, packaging.
7. the preparation method of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire according to claim 6, it is characterised in that: in step (1), storing temperature is 380��420 DEG C.
8. the preparation method of high-intensity high-tenacity electro-gas (enclosed) welding flux-cored wire according to claim 6 or 7, it is characterised in that: in step (2), mixing time is 2��3 hours.
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Effective date of registration: 20210923 Address after: No.1, Liujing Road, development zone, Dongli District, Tianjin Patentee after: Tianjin Jinqiao Welding Materials Group Co.,Ltd. Address before: 300300 No. 6, six Jing Road, Dongli District, Tianjin Patentee before: TIANJIN YONGCHANG WELDING WIRES Co.,Ltd. |