CN105397342A - Gas shielded flux-cored wire, preparation method thereof and gas shielded welding method - Google Patents
Gas shielded flux-cored wire, preparation method thereof and gas shielded welding method Download PDFInfo
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- CN105397342A CN105397342A CN201510964108.7A CN201510964108A CN105397342A CN 105397342 A CN105397342 A CN 105397342A CN 201510964108 A CN201510964108 A CN 201510964108A CN 105397342 A CN105397342 A CN 105397342A
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- Prior art keywords
- flux
- cored wire
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- powder
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Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention provides a gas shielded flux-cored wire. By regulating the components and content of the components in the flux-cored wire, phenomenon of smoke dust and sputtering generated during a welding process of a welding wire can be effectively controlled, and the welding quality can be improved. Meanwhile, the invention also provides a preparation method of the flux-cored wire. By fully mixing all raw materials in flux-cored powder, a welding wire in which the flux-cored powder is dispersed more uniformly can be obtained. Equally, the invention also provides a welding method; in the welding method, by using the flux-cored wire provided by the invention, smoke dust and sputtering generated during welding can be effectively inhibited, and the welding quality can be improved.
Description
Technical field
The present invention relates to welding wire FIELD OF THE INVENTIONThe, in particular to a kind of gas-shielded flux-cored wire, preparation method and the gas protective welding method using this welding wire.
Background technology
The while that flux-cored wire being by the circular steel pipe of thin steel coil strip or chapped pipe, fill up a kind of welding wire through drawing after the medicine core powder of certain ingredients.Medicine core powder role is similar with the coating of coated electrode, has: stable arc, deoxidation, denitrogenation, desulfurization, protection molten drop and molten bath from air oxidation, nitrogenize, interpolation alloying element, improve the effect such as joint mechanical property and auxiliary appearance of weld.
Generally speaking, the cross sectional shape of flux-cored wire is more complicated, more symmetrical, the metallurgical reaction of medicine core powder and protective effect more abundant, deposited metal is hydrogeneous, nitrogen quantity is fewer.But along with the reduction of flux-cored wire diameter, these difference will reduce gradually.When diameter is reduced to 1.6mm, the metallurgical performance of different cross section shape flux-cored wire and arc stability performance etc., reach unanimity substantially.So the welding wire of current below diameter 2.0mm generally adopts simply " O " type cross section.
Flux-cored wire almost has all advantages of other fusion material, and its excellent comprehensive serviceability and deposited metal mechanical property are that other soldering material is difficult to be equal to.Research and result of use show, flux-cored wire has the following advantages: (1) has good welding technological properties; (2) have good chemical metallurgy performance, deposited metal mechanical property is high, and anti-pore, cracking resistance line ability are strong; (3) automatic welding degree is realized good; (4) various types of welding material of metal can be modulated into more easily; (5) purposes is wide, not only for connecting, also can be used for surfacecti proteon, can also be used for the packing material etc. of various metal Quick-forming.
Flux-cored wire has fairly obvious advantage compared with stick electrode.First, interrupted welding process is become the continuous print mode of production, it does not need when welding to change welding rod, thus decreases joint number, saves the aided process times such as changing welding rod, striking and receipts arc, can carry out automated and semi-automatic operation; Secondly, flux-cored wire deposition efficiency is high, and it is little to splash, and improves weldquality and production efficiency; In addition, because flux-cored wire welding current density is large, electric arc penetration power is strong, and labor hour takes low, and thus power consumption also reduces many than stick electrode.
Flux-cored wire its advantage compared with solid core welding wire mainly contains: the first, and operating procedure performance is excellent.Flux-cored wire adds arc stabilizer, slag former, alloying constituent etc. in medicine core component, and therefore arc burning is stable, and the droplet transfer steadily, splashes and greatly reduces, and overcomes the intrinsic disadvantage that solid core welding wire splashes greatly, shaping is poor.The second, flux-cored wire appearance of weld is attractive in appearance.Flux-cored wire welding process has the booster action of slag, and motlten metal relies on the surface tension of slag to generate a soft casting mold, is conducive to the shaping of weld metal.And solid core welding wire cannot rely on the effect of slag, only rely on the viscosity of motlten metal self, weight and surface tension form weld seam, and historical facts or anecdotes core welding wire ripple is comparatively thick, and reinforcement is larger.3rd, flux-cored wire weld properties is good, and especially impact flexibility is high, can be used for many important Welding Structures.Flux-cored wire welding process Shi Qi – slag Combined Protection, the high purity of weld seam, S, P, N, H, O content is low; flux-cored wire is by sheetmetal and medicine core two kinds of approach transition alloy elements simultaneously; alloy system is easy to adjust, can make full use of existing Welding Metallurgy theoretical, obtain excellent mechanical property.4th, flux-cored wire kind is more.At present, the kind of flux-cored wire has included various conventional metal material, and as low-carbon low-alloy steel series, stainless steel is serial, heat resisting steel is serial, hardfacing alloy is serial.
Although in prior art, to the research of the component formula of flux-cored wire and production oneself through there being certain achievement, but prior art, in raising welding quality, reduces weld fumes and less spatter aspect is still not enough to some extent.
In view of this, special proposition the present invention.
Summary of the invention
The first object of the present invention is to provide a kind of gas-shielded flux-cored wire; in described flux-cored wire; by to the selection of component and the adjustment of content in welding wire medicine core; effectively can control the phenomenon of flue dust that welding wire occurs in welding process and splashing, the quality of welding can also be improved simultaneously.
The second object of the present invention is the preparation method providing a kind of described flux-cored wire, in method described in the present application, using flux for flux-cored wire powder described in the application as raw material, and the abundant oven dry passed through each raw material in medicine core powder and mixing, thus the more uniform welding wire of medicine core powder dispersion can be obtained.
3rd object of the present invention is to provide a kind of welding method, in the method, owing to employing flux-cored wire described in the application, thus effectively can suppress flue dust and the splash phenomena of generation in welding, and can improve welding quality.
In order to realize above-mentioned purpose of the present invention, spy by the following technical solutions:
In gas-shielded flux-cored wire described in the present patent application, medicine core powder component is: MgO, CaF
2, SiO
2, TiO
2, Fe
3o
4, K
2cO
3, Na
2cO
3, almag, Cr and iron powder.Wherein, in described flux-cored wire, each constituent mass percentage of medicine core powder is respectively MgO5%-10%, CaF
25%-10%, SiO
25%-10%, TiO
230%-40%, Fe
3o
41%-5%, K
2cO
31%-2%, Na
2cO
31%-6%, almag 5%-10%, Cr2%-3%, surplus is iron powder.
In the present application, by the control to MgO addition, effectively reduce the generation of splash phenomena in welding process.Meanwhile, by adding K
2cO
3with Na
2cO
3,the effect of described flux-cored wire stable arc can be improved.Same, in the present application, by adding tri-iron tetroxide, can the removability of slag be improved; Meanwhile, tri-iron tetroxide also can improve arc energy, improves welding quality.Further, in the present application, by adding Cr, intensity and the low-temperature flexibility of deposited metal can be improved.
Optionally, in the present application, described K
2cO
3with Na
2cO
3mass ratio be 1:1-1:3; Preferably, in the present application, described K
2cO
3with Na
2cO
3mass ratio be 1:2.
In the present application, by K in medicine core powder
2cO
3with Na
2cO
3the adjustment of ratio, further increases the effect of flux-cored wire stable arc of the present invention.Optionally, in the present application, the crust of described flux-cored wire is mild-carbon steel strip, and wherein, described mild-carbon steel strip is titaniferous steel band; Wherein, Ti and Al is contained in described mild-carbon steel strip.
In the present application, due to containing Ti, Al in the mild-carbon steel strip of the crust of described flux-cored wire, thus the generation of carbon monoxide and carbon dioxide in welding process can be suppressed.Because carbon monoxide and carbon dioxide play an important role to the generation of flue dust in welding process, thus, the mild-carbon steel strip containing Ti, Al just effectively can suppress the generation of flue dust in welding process.
Optionally, in the present application, in described mild-carbon steel strip, Ti content is 0.04-0.2%.
Optionally, in the present application, in described mild-carbon steel strip, Al content is 0.04-0.1%.
In the present application, in described mild-carbon steel strip, Ti content and Al content ratio are 1:2-3:1.
In the present application, by the adjustment to Ti, Al ratio in mild-carbon steel strip, can improve further and suppress the effect that in welding process, flue dust produces.
Optionally, in the present application, the filling rate of described flux-cored wire Chinese medicine core is 10%-20%; Preferably, in the present application, the filling rate of described flux-cored wire Chinese medicine core is 15%-18%.
In the present application, by the adjustment of flux-cored wire Chinese medicine core filling rate and optimization, make the present application welding wire can either realize the abundant covering of slag butt welded seam in welding, the weld seam that too much can not cause due to slag again unsightly.
Optionally, in the present application, the diameter of described flux-cored wire is 1.2-2.0mm; Preferably, in the present application, the diameter of described flux-cored wire is 1.3-1.8mm; Preferred, in the present application, the diameter of described flux-cored wire is 1.6-1.7mm.
Meanwhile, additionally provide a kind of preparation method of gas-shielded flux-cored wire in the present application, it comprises the steps: first, steel band to be processed into U-lag; Then in U-lag steel band, insert medicine core powder, the U-shaped steel band loading medicine core powder is rolled into flux cored wire by closed moulding roll; Finally, flux cored wire is admitted to drawing machine, obtains target gas-shielded flux-cored wire by the processing of drawing tube reducing.
In the present application method, by the abundant oven dry of each raw material in medicine core powder and mixing, thus the more uniform welding wire of medicine core powder dispersion can be obtained.
Optionally, in the present application method, described oven dry is carried out in two steps, and the first step is dried 3 hours at 160 DEG C respectively by each raw material; Second step is dried 5 hours under 240 DEG C of conditions more respectively by each raw material.Further, also comprise in method described in the application and raw material after oven dry is put into the step of stove inside holding, described holding temperature is 80 DEG C.
Optionally, in method described in the present application, the described mixed powder time is 40-60 minute; Preferably, method described in the present application, the described mixed powder time is 45-55 minute.
Optionally, join in powder step described in the present application, comprise the step that bulk drug core powder is screened further.
In the present application method, by further screening medicine core powder, making institute's medication core powder uniform particle diameter, being beneficial to mixing.
Optionally, in the present application, described sifting step is sieved through 80 mesh standard sieves respectively by each raw material of medicine core powder, and take according to actual needs.Further, in method described in the present application, also comprise the step medicine core powder after sieving being put into stove inside holding further.
Further, the present application additionally provides a kind of welding method, uses welding wire as described in any one of claim 1-4 in described method.
In welding method described in the present application, by using flux-cored wire described in the application, thus effectively can suppress flue dust and the splash phenomena of generation in welding, and can welding quality be improved.
Optionally, in welding described in the present application, protection gas is pure carbon dioxide or 75% carbon dioxide and 25% ar mixture; Preferably, in the present application, protection gas is pure carbon dioxide.
Compared with prior art, beneficial effect of the present invention is:
(1) flux-cored wire described in the present application, by the selection of each component and the adjustment of content in welding wire medicine core, effectively can control the phenomenon of flue dust that welding wire occurs in welding process and splashing, also can improve the quality of welding simultaneously.
(2) preparation method of flux-cored wire described in the application is by the abundant mixing to each raw material in medicine core powder, thus obtains the more uniform welding wire of medicine core powder dispersion.
(3) welding method described in the present application, by employing flux-cored wire described in the application, thus effectively can suppress flue dust and the splash phenomena of generation in welding, and can improve welding quality.
Detailed description of the invention
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but it will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting the scope of the invention.Unreceipted actual conditions person in embodiment, the condition of conveniently conditioned disjunction manufacturer suggestion is carried out.Agents useful for same or the unreceipted production firm person of instrument, be and can buy by commercially available the conventional products obtained.
Embodiment 1
The preparation of medicine core compound powder: respectively according to material rate described in embodiment 1 in such as following table 1 and comparative example 1-4, take raw material MgO, CaF
2, SiO
2, TiO
2, Fe
3o
4, K
2cO
3, Na
2cO
3, almag, Cr and iron powder.Then, each raw material is put into Muffle furnace in batches and carries out heating, drying, described oven dry is carried out in two steps: it is dried 3 hours at 160 DEG C respectively by each raw material that the first step is dried; Second step is dried, and is to be dried 5 hours under 240 DEG C of conditions more respectively by each raw material, then the raw material after oven dry is put into stove and is incubated under 80 DEG C of conditions.The raw material of drying insulation is sieved respectively by 80 mesh standard sieves, and takes suitable raw material respectively according to being described in table 1 below raw material components ratio, then, rear raw material will be taken and put into stove inside holding.Next, rear insulation raw material will be taken and mix powder 50min, obtain the medicine core compound powder with material rate described in embodiment 1-3 and comparative example 1-4.
Table 1 embodiment 1-3 and each component raw material percentage composition of comparative example 1-4 medicine core powder
The preparation of flux-cored wire: first, will containing Ti, Al, and the mild-carbon steel strip that Ti, Al ratio is 1:2 is processed into U-lag, then in U-lag steel band, insert the medicine core compound powder of material rate described in appropriate embodiment 1 and comparative example 1-4, the U-shaped steel band loading medicine core powder is rolled into flux cored wire by closed moulding roll; Finally, flux cored wire is admitted to drawing machine, obtains that diameter is 1.6mm, the filling rate of medicine core is the embodiment 1-3 of 16% and the flux-cored wire of comparative example 1-4 by the processing of drawing tube reducing.
Obtained embodiment 1 and comparative example 1-4 are obtained flux-cored wire and carry out splashing test respectively, result is as shown in table 2 below:
Table 2 embodiment 1-3 and comparative example 1-4 flux-cored wire spatter loss coefficient test data
With X70 steel plate for deposited metal test piece for welding; carbon dioxide is protective gas; and under the condition of welding current 240A, arc voltage 26V, speed of welding 28-30cm/min and carbon-dioxide protecting gas flow 20L/min; carry out Welding experiment to flux-cored wire described in embodiment 1-3 and comparative example 1-4, result is as shown in table 3 below:
Table 3 embodiment 1-3 and comparative example 1-4 flux-cored wire welding test data
Embodiment 2
According to the configuration of material rate shown in embodiment 1 medicine core compound powder, and respectively not contain Ti, Al, only containing Ti, only containing Al's, and Ti, Al content ratio be the mild-carbon steel strip of 2:1 is flux-cored wire crust, and prepare according to method described in embodiment 1 that diameter is 1.6mm, the filling rate of medicine core is the flux-cored wire of the comparative example 5-8 of 16%, and carries out Welding experiment according to condition described in embodiment 1, and the powder amount testing welding wire respectively measures, result is as shown in table 4 below:
Flux-cored wire described in the present application, effectively can control the phenomenon of flue dust that welding wire occurs in welding process and splashing, further increase the quality of welding
Although illustrate and describe the present invention with specific embodiment, however it will be appreciated that can to make when not deviating from the spirit and scope of the present invention many other change and amendment.Therefore, this means to comprise all such changes and modifications belonged in the scope of the invention in the following claims.
Claims (10)
1. a gas-shielded flux-cored wire, is characterized in that, the medicine core powder component of this flux-cored wire is: MgO, CaF
2, SiO
2, TiO
2, Fe
3o
4, K
2cO
3, Na
2cO
3, almag, Cr and iron powder;
Wherein, each constituent mass percentage is respectively MgO5%-10%, CaF
25%-10%, SiO
25%-10%, TiO
230%-40%, Fe
3o
41%-5%, K
2cO
31%-2%, Na
2cO
31%-6%, almag 5%-10%, Cr2%-3%, surplus is iron powder.
2. gas-shielded flux-cored wire according to claim 1, is characterized in that, described K
2cO
3with Na
2cO
3mass ratio be 1:1-1:3.
3. gas-shielded flux-cored wire according to claim 1, is characterized in that, described flux-cored wire crust is mild-carbon steel strip, wherein, containing Ti, Al in described mild-carbon steel strip.
4. gas-shielded flux-cored wire according to claim 3, is characterized in that, in described mild-carbon steel strip, the ratio of Ti, Al content is 1:2-3:1.
5. gas-shielded flux-cored wire according to claim 1, is characterized in that, the filling rate of described flux-cored wire Chinese medicine core is 10%-20%.
6. a preparation method for gas-shielded flux-cored wire according to any one of claim 1-5, is characterized in that, it comprises the steps: first, steel band to be processed into U-lag; Then in U-lag steel band, insert medicine core powder according to any one of claim 1-5; Then, the U-shaped steel band loading medicine core powder is rolled into flux cored wire by closed moulding roll; Finally, flux cored wire is admitted to drawing machine, obtains target gas-shielded flux-cored wire by the processing of drawing tube reducing.
7. preparation method according to claim 6, is characterized in that, described method comprises further and takes each component of medicine core powder according to part by weight, and after then each component being carried out respectively drying, joining powder, more mixed powder is to prepare the step of medicine core powder.
8. preparation method according to claim 7, is characterized in that, described in join in powder step, comprise the step that bulk drug core powder is screened further.
9. a gas protective welding method, is characterized in that, uses gas-shielded flux-cored wire as described in any one of claim 1-5 in described method.
10. welding method according to claim 9, is characterized in that, in described method, protective gas is the mist of carbon dioxide or carbon dioxide and argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510964108.7A CN105397342A (en) | 2015-12-18 | 2015-12-18 | Gas shielded flux-cored wire, preparation method thereof and gas shielded welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510964108.7A CN105397342A (en) | 2015-12-18 | 2015-12-18 | Gas shielded flux-cored wire, preparation method thereof and gas shielded welding method |
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|---|---|
| CN105397342A true CN105397342A (en) | 2016-03-16 |
Family
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|---|---|---|---|
| CN201510964108.7A Pending CN105397342A (en) | 2015-12-18 | 2015-12-18 | Gas shielded flux-cored wire, preparation method thereof and gas shielded welding method |
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|---|---|
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Cited By (3)
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|---|---|---|---|---|
| CN109128573A (en) * | 2017-06-27 | 2019-01-04 | 宝山钢铁股份有限公司 | A kind of high heat-input electro-gas (enclosed) welding gas shielded flux cored wire based on grain refinement mechanism |
| CN109604867A (en) * | 2018-12-30 | 2019-04-12 | 柳州凯通新材料科技有限公司 | A kind of highly wear-resisting alloy steel welding wire medicine core |
| CN110167712A (en) * | 2017-01-16 | 2019-08-23 | 株式会社神户制钢所 | Low hydrogen system coated electrode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110167712A (en) * | 2017-01-16 | 2019-08-23 | 株式会社神户制钢所 | Low hydrogen system coated electrode |
| CN109128573A (en) * | 2017-06-27 | 2019-01-04 | 宝山钢铁股份有限公司 | A kind of high heat-input electro-gas (enclosed) welding gas shielded flux cored wire based on grain refinement mechanism |
| CN109604867A (en) * | 2018-12-30 | 2019-04-12 | 柳州凯通新材料科技有限公司 | A kind of highly wear-resisting alloy steel welding wire medicine core |
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