CN105364339B - A kind of full-argon gas shielded arc welding is connect with flux-cored wire and preparation method and application - Google Patents
A kind of full-argon gas shielded arc welding is connect with flux-cored wire and preparation method and application Download PDFInfo
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- CN105364339B CN105364339B CN201510980570.6A CN201510980570A CN105364339B CN 105364339 B CN105364339 B CN 105364339B CN 201510980570 A CN201510980570 A CN 201510980570A CN 105364339 B CN105364339 B CN 105364339B
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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
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
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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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- Nonmetallic Welding Materials (AREA)
Abstract
Use flux-cored wire and preparation method and application, including medicinal powder and the tube wall for wrapping up medicinal powder are connect the invention discloses a kind of full-argon gas shielded arc welding, medicinal powder includes following components by mass percentage：C content, which is not more than 0.12%, Si contents and is not more than 0.4%, Mn contents, is not more than 1.5%, and 0.35~0.6%Mo, S contents are no more than 0.035%, and P content is no more than 0.035%, 0~2.0%K2CO3Powder, 0.5~1.5% potassium permanganate powder, surplus is Fe and does not inevitably have influential impurity to flux-cored wire performance；The fusion penetration of the flux-cored wire of the present invention is deep, so mother metal can be without bevel, or only needs to out small groove, stays big root face so that filling amount of metal is reduced, and welding productivity is greatly improved.It is not easy to produce incomplete fusion weld defect simultaneously, improves welded security.
Description
Technical field
Connect the present invention relates to a kind of welding material, more particularly to a kind of full-argon gas shielded arc welding with flux-cored wire and its preparation
Method and application.
Background technology
With the fast development of industrial technology, welding structure develops to maximization, high parameter, high-strength tenacity direction.It is high
Application of the cut deal of obdurability in welding structure is more and more, and current submerged-arc welding, full-argon gas shielded arc welding are cut deal welderings
The main technique connect.The welding of cut deal needs bevel, multi-layer multi-pass welding, welding production complex procedures, welding production effect
Rate is low.Publication No. uses for CN103831541A patents of invention " high-strength steel banjo fixing butt jointing laser-MIG electric arc complex welding method "
Laser-MIG electric arc composite heat power supply improves fusion penetration, and this method equipment is complicated, and investment is big, very flexible, using being restricted.By spy
The activating agent for determining composition is tuned into pasty state with organic solution, is coated in the welding workpiece surface of cleaning, is welded after after organic solution volatilization
Connect, fusion penetration can be improved.It is related to the patent such as publication No. of activating agent " a kind of to be used for weathering steel for CN103962752A patent of invention
The activating agent and application method of MAG welding ", publication No. are " a kind of to be used for stainless steel MAG welderings for CN103962750A patent of invention
The activating agent and application method connect ", publication No. are " a kind of to be used for Titanium Alloy Argon Tungsten-arc for CN102626839A patent of invention
Activating agent " etc..Activating agent is currently used primarily in the materials such as stainless steel, titanium or titanium alloy, and the use of activating agent adds welding
Production process, have the shortcomings that in-convenience in use, and consumption is also not easy accurate control so that the stability of welding quality is slightly
Difference.Also it is rarely reported suitable for the activating agent of carbon steel.
Full-argon gas shielded arc welding connects conventional welding material for flux-cored wire and solid core welding wire.Flux-cored wire has electric arc steady
Fixed, the advantages of small, chemical composition adjustment is easy of splashing, but there is manufacturing process complexity, particularly cost height, Wire Performance not in it
Such as solid core welding wire, the shortcomings of long-distance wire stability is poor.The Wire Performance of solid core welding wire is good, but its composition adjustment is difficult, weldering
Connect that splashing is big, arc stability is poor, fusion penetration is shallower, and the fusion penetration that particularly MIG is welded is more shallow, in order to penetrate, generally requires Kai great Po
Mouthful, this allows for filling amount of metal increase, welding productivity reduction.
As what large welded structures were applied gradually increases, and the increasingly harsh of structure operating condition (such as low temperature, big carries
Lotus, high temperature etc.), the application of cut deal gradually increases, and welding job amount is increased considerably, and user is excellent to low cost, Wire Performance
Different, fusion penetration is big, the efficient welding material of steady quality, and the flux-cored wire demand for being especially suitable for automatic welding is also more urgent.
The content of the invention
The purpose of the present invention is shallow, it is necessary to which bevel, multilayer is more for existing flux-cored wire full-argon gas shielded arc welding fusion penetration
Road is welded, and the low drawback of welding productivity is connect with flux-cored wire and preparation method and application there is provided a kind of full-argon gas shielded arc welding.
In order to solve the above technical problems, the technical scheme is that：
A kind of medicinal powder of flux-cored wire, it includes fusion penetration activating agent, and the fusion penetration activating agent is potassium permanganate, in medicinal powder
Size distribution is 74-297 microns.
It is preferred that, above-mentioned medicinal powder includes following components by mass percentage：C content is not more than 0.12%, Si contents
No more than 0.4%, Mn contents are not more than 1.5%, and 0.35~0.6%Mo, S contents are no more than 0.035%, and P content is no more than
0.035%, 0~2.0%K2CO3Powder, 0.5~1.5% potassium permanganate powder, surplus is Fe and inevitably medicine core is welded
Silk performance does not have influential impurity.
It is further preferred that the content that the content that C content is 0.05%~0.12%, Mn is 0.8~1.5%, Si is
0.2~0.4%.
In above-mentioned medicinal powder dusty material, the composition of potassium carbonate is with weight ratio meter K2CO3Content is not less than 95%；Potassium permanganate
With weight ratio meter KMnO4Content is not less than 99.3%.
Application of the above-mentioned medicinal powder in flux-cored wire is prepared.
A kind of full-argon gas shielded arc welding, which connects, uses flux-cored wire, including above-mentioned medicinal powder and the tube wall for wrapping up medicinal powder.
It is preferred that, a diameter of 1.2-1.6mm of the flux-cored wire.
It is preferred that, the cross sectional shape of the welding wire is annular.
It is preferred that, the tube wall is SPCC or H08A low-carbon steel materials.
The preparation method of above-mentioned flux-cored wire, comprises the following steps：
1) steel band for setting wall thickness and setting width is rolled, make its cross section is shaped as U-shaped；
2) medicinal powder is added into the U-lag of the steel band of rolling；
3) U-lag is healed up, medicinal powder is wrapped in U-lag, by drawing tube reducing, flux-cored wire is made.
It is preferred that, step 1) in, the wall thickness of the steel band is 0.8-1.0mm, and width is 12-16mm；Or the steel band is
SPCC steel bands.
It is preferred that, step 2) in, the filling rate of U-lag traditional Chinese medicine powder is 10-15%.Filling rate be medicinal powder quality and medicinal powder,
The ratio of steel band quality sum.
It is preferred that, step 3) in, a diameter of 1.2-1.6mm after drawing tube reducing.
Ar is 80%-95% in application of the above-mentioned flux-cored wire in full-argon gas shielded arc welding, argon-rich gas, and surplus is oxygen
Gas or carbon dioxide.
Alloys producing is as follows in above-mentioned flux-cored wire：
When C content is less than 0.05%, ratio of ferrite is higher in deposited metal, and low strength is unfavorable for acicular ferrite
Formation, and can make deposited metal intensity too high more than 0.12%, the increase of pearlite ratio is also unfavorable for ferritic a large amount of shapes
Into.It is mainly derived from iron alloy powder.
Si content control is below 0.4% in Si deposited metals, increases that Si is serious more than 0.4% weld seam, toughness to weld seam,
Plasticity is unfavorable, therefore should control the Si amounts in welding wire, and Si is mainly derived from ferrosilicon powder.
Mn is the effective element of weld seam reinforcing, and when Mn contents are less than 0.8% in weld seam, weld strength is relatively low, it is necessary to add
Plus the reinforcing of other alloying elements；When Mn contents are higher than 1.5% in weld seam, the low-temperature flexibility of weld metal is decreased obviously.Mn exists
Can be with deoxidation, desulfurization, reduction hot cracking tendency in welding process.Mn derives from manganese powder or ferromanganese powder.
S, P element Resistance of Weld Metal low-temperature flexibility have damaging effect, easily crack weld seam, and should try one's best reduction, it is desirable to
S, P content are no more than 0.035% respectively in flux-cored wire.
Arc stabilizer：The effect of main stabilization electric arc, from K2CO3Powder.
Fusion penetration activating agent：The oxidisability of potassium permanganate, increase electric arc and liquid metal is added, makes weld pool surface formation oxidation
Thing, by influenceing liquid state of molten pool metallic surface tension force, changes its flow direction, and arc heat is delivered into molten bath bottom increase fusion penetration.
The oxide of weld pool surface also reduces conductive area, arc constriction, increases fusion penetration.Addition be less than 0.5% when, oxidisability compared with
It is weak, increase the DeGrain of fusion penetration；When addition is more than 1.5%, oxidisability is excessive, and weld seam oxygenation, field trash increases, reduction
The toughness plasticity of weld metal.
The present invention advantageous effects be：
(1) fusion penetration of flux-cored wire of the invention is deep, so mother metal can be without bevel, or only needs to out small
Groove, stay big root face so that filling amount of metal is reduced, and welding productivity is greatly improved.It is not easy to produce incomplete fusion simultaneously
Weld defect, improves welded security.
(2) composition of deposited metal can be adjusted accordingly by changing the composition of flux-cored wire medicinal powder, it is possible to
By adjusting the medicinal powder component of flux-cored wire, the other steel of different intensity scale are welded, expand the application of flux-cored wire.
(3) argon-rich gas shielded increase fusion penetration flux-cored wire of the invention can with coiling disc forming, can also barrelling, suitable for even
Continuous automatic welding, particularly robot welding.
(4) during flux-cored wire of the invention welding, using argon-rich gas shielded, welding arc stablility, splash small, weld matter
Amount is high, meanwhile, the argon-rich gas shielded welding for being further adapted for high-strength structure part.
Embodiment
Technical scheme is described further with reference to embodiment.
Embodiment 1
(1) it is 0.9mm from wall thickness, width is 16mm commercially available SPCC steel bands, sharp after being cleaned with ultrasonic cleaning apparatus
Existing flux-cored wire production line is used, cross section is rolled into for U-shaped along steel band length direction (longitudinal direction).
The chemical composition (quality %) of SPCC steel bands is, 0.06%C, 0.02%Si, 0.43%Mn, 0.012%S,
0.023%P.
(2) medicinal powder is added into above-mentioned U-shaped grain, filling rate is that 15% (filling rate is medicinal powder quality and medicinal powder, steel band quality
The ratio of sum), wherein：The medicinal powder is the dusty material that granularity is -297 microns+74 microns (i.e. the mesh of -50 mesh+200).
Above-mentioned powder chemistry composition by mass percentage containing 0.05%C, 0.38%Si, 1.35%Mn, 0.02%S,
0.025%P, 1.0%K2CO3Powder, 1.3% potassium permanganate powder, surplus are Fe and not had to flux-cored wire performance inevitably
Influential impurity.
(3) U-lag is healed up, makes alloyed powder parcel wherein, the position that heals up is using docking connected mode；Touched by wire drawing,
By road drawing, tube reducing, its diameter is finally set to reach 1.6mm.
(4) by the flux-cored wire coiling disc forming obtained by step (3), flux-cored wire product is produced.
The flux-cored wire of diameter 1.6mm produced above increase fusion penetration, using 80%Ar+20%CO2Argon-rich gas are protected
Shield weldering, welding current 320A, arc voltage 35V, shield gas flow rate 25L/min, wire speed is 520mm/min.Deposition gold
The mechanical property of category meets E49C-B2L (GB/T17493-2008《Low-alloy steel flux-cored wire》), fusion penetration is commercial metals powder type
1.79 times of welding wire E49C-B2L.
Embodiment 2
(1) it is 0.8mm from wall thickness, width is 12mm commercially available SPCC steel bands, sharp after being cleaned with ultrasonic cleaning apparatus
Existing flux-cored wire production line is used, cross section is rolled into for U-shaped along steel band length direction (longitudinal direction).
The chemical composition (quality %) of SPCC steel bands is, 0.08%C, 0.03%Si, 0.48%Mn, 0.015%S,
0.025%P.
(2) medicinal powder is added into above-mentioned U-shaped grain, filling rate is that 10% (filling rate is medicinal powder quality and medicinal powder, steel band quality
The ratio of sum), wherein：The medicinal powder is the dusty material that granularity is -297 microns+74 microns (i.e. the mesh of -50 mesh+200).
Above-mentioned powder chemistry composition by mass percentage containing 0.10%C, 0.28%Si, 1.50%Mn, 0.025%S,
0.03%P, 1.5% potassium permanganate powder, surplus are Fe and inevitably do not have influential impurity to flux-cored wire performance.
(3) U-lag is healed up, makes alloyed powder parcel wherein, the position that heals up is using docking connected mode；Touched by wire drawing,
By road drawing, tube reducing, its diameter is finally set to reach 1.2mm.
(4) by the flux-cored wire coiling disc forming obtained by step (3), flux-cored wire product is produced.
The flux-cored wire of diameter 1.2mm produced above increase fusion penetration, using 95%Ar+5%O2It is argon-rich gas shielded
Weldering, welding current 260A, arc voltage 27V, shield gas flow rate 25L/min, wire speed is 500mm/min.Deposited metal
Mechanical property meet E49C-B2L (GB/T17493-2008《Low-alloy steel flux-cored wire》), fusion penetration is the weldering of commercial metals powder type
1.65 times of silk E49C-B2L.
Embodiment 3
(1) it is 1.0mm from wall thickness, width is 14mm commercially available SPCC steel bands, sharp after being cleaned with ultrasonic cleaning apparatus
Existing flux-cored wire production line is used, cross section is rolled into for U-shaped along steel band length direction (longitudinal direction).
The chemical composition (quality %) of SPCC steel bands is, 0.10%C, 0.05%Si, 0.50%Mn, 0.025%S,
0.029%P.
(2) medicinal powder is added into above-mentioned U-shaped grain, filling rate is that 13% (filling rate is medicinal powder quality and medicinal powder, steel band quality
The ratio of sum), wherein：The medicinal powder is the dusty material that granularity is -297 microns+74 microns (i.e. the mesh of -50 mesh+200).
Above-mentioned powder chemistry composition by mass percentage containing 0.12%C, 0.40%Si, 1.25%Mn, 0.028%S,
0.032%P, 2.0%K2CO3Powder, 0.5% potassium permanganate powder, surplus are Fe and not had to flux-cored wire performance inevitably
Influential impurity.
(3) U-lag is healed up, makes alloyed powder parcel wherein, the position that heals up is using docking connected mode；Touched by wire drawing,
By road drawing, tube reducing, its diameter is finally set to reach 1.4mm.
(4) by the flux-cored wire coiling disc forming obtained by step (3), flux-cored wire product is produced.
The flux-cored wire of diameter 1.4mm produced above increase fusion penetration, using 90%Ar+10%CO2Argon-rich gas are protected
Shield weldering, welding current 290A, arc voltage 28V, shield gas flow rate 25L/min, wire speed is 500mm/min.Deposition gold
The mechanical property of category meets E49C-B2L (GB/T17493-2008《Low-alloy steel flux-cored wire》), fusion penetration is commercial metals powder type
1.47 times of welding wire E49C-B2L
Although the above-mentioned embodiment to the present invention is described, not to the limitation of invention protection domain,
One of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art need not pay
Various modifications or deform still within the scope of the present invention that creative work can be made.
Claims (9)
1. a kind of medicinal powder of flux-cored wire, it is characterised in that：It includes fusion penetration activating agent, and the fusion penetration activating agent is permanganic acid
Size distribution in potassium, medicinal powder is 74-297 microns；
The medicinal powder includes following components by mass percentage：C content is not more than 0.12%, Si contents and is not more than 0.4%,
Mn contents are not more than 1.5%, 0.35~0.6%Mo, and S contents are no more than 0.035%, and P content is no more than 0.035%, 0~
2.0%K2CO3Powder, 0.5~1.5% potassium permanganate powder, surplus is Fe and does not inevitably have shadow to flux-cored wire performance
Loud impurity.
2. medicinal powder according to claim 1, it is characterised in that：C content is that 0.05%~0.12%, Mn content is
0.8%~1.5%, Si content are 0.2%~0.4%.
3. application of the medicinal powder described in claim 1 or 2 in flux-cored wire is prepared.
4. a kind of full-argon gas shielded arc welding, which connects, uses flux-cored wire, it is characterised in that：Including medicinal powder described in claim 1 or 2 and use
In the tube wall of parcel medicinal powder.
5. flux-cored wire according to claim 4, it is characterised in that：A diameter of 1.2-1.6mm of the flux-cored wire；
Or the cross sectional shape of the welding wire is annular.
6. flux-cored wire according to claim 4, it is characterised in that：The tube wall is SPCC or H08A low-carbon steel materials.
7. the preparation method of the flux-cored wire described in claim 5 or 6, it is characterised in that：Comprise the following steps：
1) steel band for setting wall thickness and setting width is rolled, make its cross section is shaped as U-shaped；
2) medicinal powder is added into the U-lag of the steel band of rolling；
3) U-lag is healed up, medicinal powder is wrapped in U-lag, by drawing tube reducing, flux-cored wire is made.
8. preparation method according to claim 7, it is characterised in that：
Step 1) in, the wall thickness of the steel band is 0.4-1.0mm, and width is 12-16mm；
Or the steel band is SPCC steel bands；
Or, step 2) in, the filling rate of U-lag traditional Chinese medicine powder is 10-15%；
Or, step 3) in, a diameter of 1.2-1.6mm after drawing tube reducing.
9. Ar is 80%- in application of the flux-cored wire described in claim 5 or 6 in full-argon gas shielded arc welding, argon-rich gas
95%, surplus is oxygen or carbon dioxide.
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| CN105345313B (en) * | 2015-12-23 | 2017-06-16 | 山东大学 | A kind of high-strength flux-cored wire for increasing fusion penetration and preparation method and application |
| CN111790966A (en) * | 2020-06-29 | 2020-10-20 | 华达汽车科技股份有限公司 | Automatic MAG welding process for threshold tubular beam and special welding wire thereof |
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| DE10144204A1 (en) * | 2001-09-08 | 2003-03-27 | Howaldtswerke Deutsche Werft | Electrode for arc welding processes |
| CN101486131B (en) * | 2009-02-26 | 2010-11-17 | 山东大学 | Large-diameter submerged-arc welding flux-cored wire for medium plate |
| US9199341B2 (en) * | 2012-08-28 | 2015-12-01 | Hobart Brothers Company | Systems and methods for welding electrodes |
| CN103418941B (en) * | 2013-07-30 | 2016-03-02 | 北京工业大学 | The welding wire repaired for wear parts abrading section and manufacture method thereof |
| CN104227270B (en) * | 2014-10-08 | 2016-03-30 | 山东大学 | A kind of active twisted wire welding wire increasing fusion penetration |
| CN105345313B (en) * | 2015-12-23 | 2017-06-16 | 山东大学 | A kind of high-strength flux-cored wire for increasing fusion penetration and preparation method and application |
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