CN101204763B - Flux-cored wire for gas-shielded arc welding - Google Patents
Flux-cored wire for gas-shielded arc welding Download PDFInfo
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- CN101204763B CN101204763B CN200710185054XA CN200710185054A CN101204763B CN 101204763 B CN101204763 B CN 101204763B CN 200710185054X A CN200710185054X A CN 200710185054XA CN 200710185054 A CN200710185054 A CN 200710185054A CN 101204763 B CN101204763 B CN 101204763B
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- tio
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- cored wire
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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
- B23K35/02—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
-
- 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
-
- 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
- B23K35/362—Selection of compositions of fluxes
-
- 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
- B23K35/40—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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
Abstract
The present invention provides a flux-cored wire for the most suitable gas protection arc welding as the welding material of the high tension steel, capable of realizing such welding metal as following, the intensity ensured in the 0.2% yield point is above 620MPa, the V pendulum impact value of the low temperature of the negative 60 centi degree is ensured above the 50J. The flux-cored wire measured relative to the quality % of the total quality of the wire, comprises C:0.02-0.12%, Si:0.3-1.4%, Mn:1.2-3.5%, Ni:0.2-3.4%, Cr:0.02-2.0%, Ti:2.0-6.0%, Mo:0.1-2.2% and Mg: 0.01-1.0%, and the contentof the TiO2 in the welding agent and the content of the MgO meet such relation as following: Tio2/Mgo>=4.7, wherein, Tio2 and Mgo are the content of the Tio2/Mgo in the welding agent (relative to thetotal quality of the wire %).
Description
Technical field
The present invention relates in the steel crust, fill with TiO
2TiO for main body
2The flux-cored wire for gas-shielded arc welding that system's (TiO 2 series) solder flux forms; it is good particularly to relate to weld job; and can access given play to good toughness weld metal, and the flux-cored wire for gas-shielded arc welding of the welding of suitable high tension steel.
Background technology
Boats and ships and marine structure etc. are constructed by the welding high tension steel and are formed, and in order to construct such works, expectation realizes a kind of high strength and given play to good toughness (particularly low-temperature flexibility) welding material.
Though in the field of shielded arc welding and submerged-arc welding, the welding material of low-temperature flexibility excellence obtains exploitation,, existing problems aspect operating efficiency and welding posture.
On the other hand, used the gas shielded arc welding of flux-cored wire, known welding bead outward appearance is good and can obtain excellent weld job.About employed flux-cored wire in such gas shielded arc welding, what be widely used is titanium dioxide flux-cored wire, and it is to have filled with titanium dioxide (TiO in the steel crust
2) be the flux-cored wire of the solder flux of principal component.
Yet when using the flux-cored wire of having filled TiO 2 series solder to implement gas shielded arc welding, the oxygen concentration in the weld metal is easy to become up to about 500～600ppm, thereby exists the low-temperature flexibility of weld metal to reduce such problem easily.
Thus, about flux-cored wire, still just be conceived to up to now the characteristic (particularly low-temperature flexibility) of the machinery of weld metal and weld job and deposit and carrying out the exploitation of various welding materials.
As this technology, for example in patent documentation 1, propose, use with TiO
2, MgO, MnO be principal component, TiO
2/ MgO is the TiO 2 series solder more than 1.7, and, the alloying component of Co, Cr, C, Mn, Ni, Mo etc. is adjusted to suitable scope, can guarantee thus good weld job and machinery characteristic (tensile strength TS: more than about 790MPa, the V pendulum impact value vE under-30 ℃
-30More than about 100J).
Propose in the patent documentation 2 in addition, in gas shielded arc welding medication welding wire, regulation TiO
2, MgO, metal fluoride and alloying component (Si, Mn, Mg, Ni, Cu, Mo etc.) proper range, thereby can guarantee good weld job and machinery characteristic (tensile strength TS: more than about 830MPa, the V pendulum impact value vE under-40 ℃
-40More than about 108J).
In addition, open in the patent documentation 3, in alkaline flux-cored wire, be TiO by making slag
2-CaF
2System, and add Mg, Si, Mn metal oxide in addition, thus on the characteristic of weld job and machinery, can satisfy the specification of KS (Korea S country specification) and AWS (AWS).
On the other hand, open in patent documentation 4, as employed flux-cored wire when welding tensile strength TS is the steel of 490MPa level, by in solder flux, adding SiO
2And Al
2O
3, can reduce the residual stress of weld part (weld metal), thereby fatigue strength is improved.
Open in patent documentation 5 in addition, in being applicable to the titanium dioxide flux-cored wire of gas shielded arc welding, by with TiO
2With among Mg and the Fe more than a kind and SiO
2, MnO and with and add in the solder flux, then can access weld job and mechanical characteristic (tensile strength TS: more than about 580MPa, the V pendulum impact value vE under 0 ℃
0More than about 150J) all good weld metal.
[patent documentation 1] spy opens flat 3-47695 communique
[patent documentation 2] spy opens flat 3-294093 communique
[patent documentation 3] spy opens the 2003-154487 communique
[patent documentation 4] spy opens the 2002-307189 communique
[patent documentation 5] spy opens flat 7-314182 communique
By the exploitation of above-mentioned various technology, though can access the better welded structure of the toughness of weld metal, actual conditions are still to expect to obtain more high strength and the more such flux-cored wire of weld metal of high tenacity.That is, the realization of a kind of like this weld metal of expectation, its with strength balance as the employed high tension steel of welding base metal (by wlding) on, can guarantee at 0.2% yield point (σ as intensity
0.2) down for more than the 620MPa, the V pendulum impact value vE under-60 ℃ the low temperature
-60Can guarantee more than the 50J.Yet actual conditions are that in the technology that is proposed up to now, this flux-cored wire for gas-shielded arc welding that can access the weld metal of high-intensity high-tenacity like this still fails to realize.
Summary of the invention
The present invention is conceived to above-mentioned this situation and forms; its purpose is; a kind of flux-cored wire for gas-shielded arc welding that is fit to the most as the welding material of high tension steel is provided, and it can realize such weld metal, can guarantee at 0.2% yield point (σ as intensity
0.2) be more than the 620MPa, the V pendulum impact value vE of-60 ℃ low temperature
-60Can guarantee more than the 50J.
Can reach the flux-cored wire for gas-shielded arc welding so-called of the present invention of above-mentioned purpose, have following some main idea, among the steel crust, fill with TiO
2Be that solder flux is in the flux-cored wire for gas-shielded arc welding that forms of the solder flux of main body; in quality % with respect to the welding wire gross mass; contain C:0.02～0.15%, Si:0.3～1.4%, Mn:1.2～3.5%, Ni:0.2～3.4%, Cr:0.02～2.0%, Ti:2.0～6.0%, Mo:0.1～2.2% and Mg:0.01～1.0%, and the TiO in the solder flux
2Content [TiO
2] satisfy the relation of following formula (1) with MgO content [MgO].
[TiO
2]/[MgO]≥4.7…(1)
Wherein, [TiO
2] and [MgO] TiO of being in the solder flux to be comprised
2Content (with respect to the quality % of welding wire gross mass) with MgO
In flux-cored wire for gas-shielded arc welding of the present invention, described TiO
2Content [TiO
2] being preferably 4.5～6.1%, MgO content [MgO] is preferably 0.2～1.5%.In addition, the filling rate of solder flux is preferably about 10～30%.
In flux-cored wire of the present invention, form by suitably adjusting, and make TiO in the solder flux as the overall chemical composition of flux-cored wire
2Be in the proper range with the ratio of MgO, can reduce the oxygen concentration that moves in the deposited metal, thereby the field trash in the reduction deposited metal (oxide), as consequently, can significantly improve with the deposited metal with good characteristic is the toughness of the added metal of main composition part.
The specific embodiment
Present inventors study repeatedly with keen determination in order to solve described problem.It found that, forms by suitably adjusting as the overall chemical composition of flux-cored wire, and add the MgO of ormal weight in solder flux, can make TiO
2Activity corresponding to oxygen reduces.In view of the above, even the Ti content overall as welding wire increases, finally still can reduce the oxygen concentration that moves in the deposited metal, thereby can reduce the field trash (oxide) in the deposited metal, found that as it, can significantly improve with the deposited metal with good characteristic is the toughness of the added metal of main composition part, and then finishes the present invention.
In flux-cored wire for gas-shielded arc welding of the present invention; suitably the content (with respect to the quality % of welding wire gross mass) of regulation basis C, Si, Mn, Ni, Cr, Ti and Mg also is important important document, and the scope of the content of these compositions limits and the reasons are as follows.Also have, these compositions are to impact as the characteristic of the overall content of welding wire to deposited metal, no matter its form of same composition (metal or oxide) meaning all is its total amount.For example, for Ti and Mg, though also contain form as oxide, following content is also to have comprised the value that forms the metallic element amount of oxide.
(C：0.02～0.15％)
C is important element on the intensity of guaranteeing weld metal (fusion of the part of above-mentioned deposited metal and mother metal and form " weld metal ").For at 0.2% yield point (σ
0.2) under guarantee more than the 620MPa that needing C content is more than 0.02%.Yet if C content surplus, the too high low temperature crack sensitivity that causes of intensity uprises, therefore should be for below 0.15%.Also have, the preferred lower limit of C content is 0.04%, and preferred upper limit is 0.08%.
(Si：0.3～1.4％)
Si brings into play effect as deoxidier, is effective elements on the intensity of guaranteeing weld metal and reduction oxygen.In order to bring into play such effect, Si content need be for more than 0.3%.Yet, if becoming superfluous, Si content surpasses 1.4%, the viscosity of deposited metal uprises, and can make the weld job reduction.Also have, the preferred lower limit of Si content is 0.4%, and preferred upper limit is 0.9%.
(Mn：1.2～3.5％)
Mn is an effective elements on the intensity of guaranteeing weld metal and reduction oxygen.When Mn content is lower than 1.2%, cause deoxidation not enough and can not guarantee the strength and toughness of weld metal.On the other hand, become superfluous if Mn content surpasses 3.5%, then intensity uprises and the low temperature crack sensitivity uprises.Also have, the preferred lower limit of Mn content is 1.7%, and preferred upper limit is 2.9%.
(Ni：0.2～3.4％)
Ni is important element on the intensity of guaranteeing weld metal and toughness.Ni content is lower than at 0.2% o'clock, and sufficient tough property improvement effect does not obtain performance, surpasses 3.4% heat cracking sensitiveness and uprises.Also have, the preferred lower limit of Ni content is 1.7%, and preferred upper limit is 2.4%.
(Cr：0.02～2.0％)
Cr is useful element on the intensity of stably guaranteeing weld metal.When Cr content is lower than 0.02%, then can not guarantee full intensity, if surpass 2.0%, then intensity becomes too high and makes the toughness deterioration.Also have, the preferred lower limit of Cr content is 0.1%, and preferred upper limit is 0.5%.
(Ti：2.0～6.0％)
Ti is the element with deoxidation effect, still makes the element of crystal grain miniaturization in addition effectively.In order to bring into play these effects, Ti content need be for more than 2.0%.Yet superfluous if Ti content becomes, it is too high that intensity becomes, and make the weld job reduction slag generation quantitative change more.Also have, the preferred lower limit of Ti content is 3.3%, and preferred upper limit is 4.0%.
(Mo：0.1～2.2％)
Mo is guaranteeing on the intensity of weld metal it is important element.Mo content is lower than at 0.1% o'clock, then can not guarantee full intensity, if surpass 2.2% significantly sclerosis, toughness is reduced.Also have, the preferred lower limit of Mo content is 0.2%, and preferred upper limit is 1.0%.
(Mg：0.01～1.0％)
Mg has deoxidation effect, and when Mg content was lower than 0.01%, the deoxidation effect deficiency can make the toughness of weld metal reduce.Yet if Mg content becomes superfluous and surpasses 1.0%, the flue dust when welding increases and makes the weld job reduction.Also have, the preferred lower limit of Mg content is 0.1%, and preferred upper limit is 0.8%.
In flux-cored wire of the present invention, in the solder flux TiO
2Content [TiO
2] to satisfy the relation of following formula (1) also very important with MgO content [MgO].Stipulate this related the reasons are as follows.
[TiO
2]/[MgO]≥4.7…(1)
Wherein, [TiO
2] and [MgO] TiO of being in the solder flux to be comprised
2Content (with respect to the quality % of welding wire gross mass) with MgO
In flux-cored wire of the present invention,, can make the TiO in the solder flux by in solder flux, adding MgO
2The active reduction can make the oxygen concentration in the deposited metal reduce thus.By this phenomenon is carried out, can reduce the field trash (oxide based field trash) in the deposited metal, particularly can realize low-temperature flexibility good (be exactly the V pendulum impact value vE under-60 ℃ the low temperature specifically
-60More than 50J) weld metal.
Above-mentioned effect (oxygen concentration reduction effect) is many more and brought into play effectively along with MgO content, if but from the viewpoint of weld job, it is on the contrary and make it to worsen that then itself and oxygen reduce effect.From guaranteeing this viewpoint of weld job at least, need to make TiO in the present invention
2/ MgO is more than 4.7.Yet, if with respect to TiO
2The ratio of MgO content tail off, though then weld job is good, oxygen reduces effect and reduces on the contrary, the toughness deterioration of weld metal, therefore preferred TiO
2/ MgO reaches about 16.9.In addition, TiO
2The preferred lower limit of/MgO is about 8.0.
Flux constituent in the flux-cored wire of the present invention comprises principal component TiO at least
2, but preferably also make this TiO
2Content [TiO
2] be in suitable scope.That is, if TiO
2Content ([TiO
2]) tail off, then as TiO
2The effect of flux cored wire (mainly being weld job) will be difficult to obtain performance, otherwise it is many to contain quantitative change as if it, and then the oxygen concentration of (in the final weld metal) demonstrates the tendency that uprises in the deposited metal.From this viewpoint, preferably make TiO
2Content ([TiO
2]) be in (with respect to the overall ratio of welding wire) about 4.5～6.1%.Also have, about the preferred content of MgO, its adjustment mode is, at TiO
2The proper range of addition in, and make above-mentioned [TiO
2]/[MgO] be in the scope of regulation, but be preferably about 0.2～1.5%.
In flux-cored wire of the present invention, if above-mentioned each element is in the afore mentioned rules scope, and [TiO
2]/[MgO] be set in the above-mentioned scope, then can realize its purpose, but as flux constituent, also can contain except TiO
2With other oxides (Al for example beyond the MgO
2O
3, SiO
2, ZrO
2Deng slag former and arc stabilizer).
By the solder flux that above-mentioned each composition constitutes, be filled in the outer intracutaneous of steel and constitute flux-cored wire, but the filling rate of solder flux (hereinafter referred to as " solder flux filling rate ") is advisable with about 10～30% preferably in suitable scope.When the solder flux filling rate was lower than 10%, it was very difficult just to carry out the interpolation of the alloying element that needs from solder flux, can cause raw-material cost to rise and add these elements from crust, in addition, if the solder flux filling rate surpasses 30%, then crust attenuation and broken string easily will cause the deterioration of stringiness.The preferred lower limit of solder flux filling rate is about 12%, and preferred upper limit is about 20%.
Also have, above-mentioned solder flux filling rate is the value by following definitions.
Solder flux filling rate (quality %)={ (quality of solder flux)/(quality that flux-cored wire is overall) } * 100
In flux-cored wire of the present invention, with respect to the overall constituent content of welding wire, basically can be subjected to the influence of content contained in contained metallic element amount of oxide in the solder flux and the steel crust etc., but, from being included in the solder flux and oxide amount that obtains and filling rate, and be included in the steel crust and the restriction of the amount of element that obtains etc., only adjust contained content in metallic element amount in the oxide in the solder flux and the steel crust, the situation that is difficult to adjust the overall constituent content of welding wire is then arranged.Ti content in the flux-cored wire particularly of the present invention only is difficult to adjust at the content in constituent content in the oxide and the steel crust.In this case, by in solder flux, adding the metal dust of Ti, then can adjust as the overall Ti content of welding wire.
[embodiment]
Below, enumerate embodiment and be described more specifically the present invention, but the present invention is not subjected to the restriction of following embodiment certainly, can certainly be before meeting be suitably changed enforcement in the scope of aim described later, these all are included in the technology of the present invention scope.
(embodiment 1)
At first, C:0.05%, Si:0.05%, Mn:0.50%, Ti:0.02% will be contained respectively, surplus: the mild steel system hoop (hoop) (steel crust: be equivalent to the HT80 steel) that is made of iron and unavoidable impurities bends to cylindric, and fills allotment various oxide (TiO are arranged
2, MgO, Al
2O
3, SiO
2, ZrO
2Deng) solder flux, next carries out Wire Drawing, is made into the solder flux filling rate: 13.5%, line footpath: the flux-cored wire of 1.2mm.Employing constitutes the basis with this, adjusts the method for the chemical composition of steel crust, and by adopting the method for having mixed metal dust in solder flux, is made into carried out the various flux-cored wires of adjusting as each overall constituent content of welding wire.The chemical composition composition of each flux-cored wire of making is presented in the following table 1, and the allotment ratio of the oxide in the solder flux (with respect to the overall quality % of welding wire) is presented in the following table 2.
[table 1]
*Surplus: iron, the composition and the unavoidable impurities of sneaking into from flux constituent.
[table 2]
Each flux-cored wire that use is good welds by following condition, makes deposited metal.Extract tension test (JIS Z3111A1 number) and pendulum impact test sheet (JISZ3111A4 number) and carry out each test from this deposited metal, measure 0.2 yield point (σ
0.2) and the V pendulum impact value (vE of-60 ℃ low temperature
-60).
(welding condition)
Posture: down to
Protective gas: 80%Ar+20%CO
2
Welding current: 280A
Weldingvoltage: 31V
Speed of welding: 300mm/min
Preheating interpass temperature: 150 ℃
Heat energy: 1.7kJ/mm
For trying steel plate (welding base metal): JIS G 3128SHY865 (thickness of slab: 20mm)
Groove shape: 45 ° of bevel angles (V groove), gap 12mm
In addition, weld (upward welding in the vertical position), estimate weld job with the welding condition shown in following.Being evaluated as of weld job, the ganoid average evaluation of deposited metal after can upwards standing and weld is good (representing with zero mark), can upwards stand, but big concavo-convex average evaluation bad for having slightly (being represented by the △ mark) takes place in the deposited metal after welding surface, and slag and motlten metal (molten drop) hang and unweldable average evaluation is bad (being represented by * mark).
(welding condition of weld job evaluation)
Posture: upward welding in the vertical position
Protective gas: 80%Ar+20%CO
2
Welding current: 220A
Weldingvoltage: 22～24V
Speed of welding: 14cm/min
The groove shape: 90 ° of bevel angles (V groove),
Yaw (weaving) width: 7mm
These result (σ
0.2, vE
-60With weld job) be presented at (evaluation criterion: σ in the following table 3 in the lump
0.2〉=620MPa, vE
-60〉=50J is qualified).Also have, also shown about the oxygen concentration in the deposited metal of trying to achieve in the table 3 according to the inert gas method of melting.
[table 3]
| Test No. | σ 0.2 | vE -60 | Oxygen concentration in the deposited metal (quality %) | Weld job | Reference |
| 1 | 708 | 61 | 0.046 | ○ | Low-temperature flexibility, weld job are good |
| 2 | 729 | 51 | 0.045 | ○ | Low-temperature flexibility, weld job are good |
| 3 | 691 | 58 | 0.044 | ○ | Low-temperature flexibility, weld job are good |
| 4 | 625 | 54 | 0.044 | ○ | Low-temperature flexibility, weld job are good |
| 5 | 633 | 57 | 0.044 | ○ | Low-temperature flexibility, weld job are good |
| 6 | 541 | 52 | 0.049 | ○ | Undercapacity |
| 7 | 922 | 47 | 0.045 | ○ | Intensity is excessive, and the low temperature crackle takes place |
| 8 | 475 | 22 | 0.063 | ○ | Undercapacity, toughness deficiency |
| 9 | 825 | 53 | 0.050 | △ | The operation deterioration |
| 10 | 561 | 38 | 0.052 | ○ | Undercapacity, toughness deficiency |
| 11 | 911 | 18 | 0.055 | ○ | Intensity is excessive, and the low temperature crackle takes place |
| 12 | 707 | 27 | 0.057 | ○ | The toughness deficiency |
| 13 | 764 | 53 | 0.050 | ○ | Heat cracking takes place |
| Test No. | σ 0.2 | vE -60 | Oxygen concentration in the deposited metal (quality %) | Weld job | Reference |
| 14 | 605 | 51 | 0.055 | ○ | Undercapacity |
| 15 | 934 | 36 | 0.053 | ○ | Intensity is excessive, toughness is not enough |
| 16 | 666 | 50 | 0.050 | ○ | Undercapacity |
| 17 | 766 | 32 | 0.053 | ○ | Intensity is excessive, toughness is not enough |
| 18 | 741 | 26 | 0.045 | ○ | The toughness deficiency |
| 19 | 898 | 18 | 0.060 | △ | Intensity is excessive, and slag increases |
| 20 | 710 | 47 | 0.065 | ○ | The toughness deficiency |
| 21 | 726 | 65 | 0.042 | △ | The weld fumes amount increases |
Show as can be known as this result, strength and toughness becomes opposite relation, if improve the then tendency of flexible reduction of intensity, but (test No.1～5) of satisfying regulation important document of the present invention then can access all good deposited metal of intensity and toughness, and weld job is also good.
With respect to this, be short of any one (test No.6～21) of the important document of the present invention regulation as can be known, even on intensity, satisfy, but at least one performance degradation of toughness and weld job.
(embodiment 2)
Make various flux-cored wires, except making the ratio variation that is formulated to the various oxides in the solder flux, other are all identical with embodiment 1.The chemical composition composition of each flux-cored wire of making is presented in the following table 4, and the allotment ratio of the oxide in the solder flux (with respect to the quality % of welding wire gross mass) is presented in the following table 5.
[table 4]
*Surplus: iron, the composition and the unavoidable impurities of sneaking into from flux constituent.
[table 5]
Each flux-cored wire of use welds by the condition shown in the embodiment 1, makes deposited metal, and measures the σ of deposited metal
0.2, V pendulum impact value (vE
-60) and oxygen concentration.In addition, also the same about the evaluation of weld job with embodiment 1.
These result (σ
0.2, vE
-60, oxygen concentration and weld job) be presented at (evaluation criterion: σ in the following table 6 in the lump
0.2〉=620MPa, vE
-60〉=50J is qualified).
[table 6]
Can carry out following investigation by this result.That is, in TiO 2 series solder, add MgO as can be known, can reduce the oxygen concentration in the deposited metal effectively.In addition we know, if the content of MgO is increased (that is, if reduce TiO
2/ if MgO), then the oxygen concentration in the deposited metal demonstrates the tendency of reduction, particularly TiO
2/ MgO is below 9.0, and then oxygen concentration becomes (440ppm is following) below 0.044%.
On the other hand, too much (that is TiO, if MgO becomes
2/ MgO ratio becomes too small), weld job deterioration (test No.31～35) then.Yet, TiO
2/ MgO is 4.7 when above, can guarantee good weld job as can be known.
Therefore, in flux-cored wire for gas-shielded arc welding, if make TiO in the TiO 2 series solder as can be known
2/ MgO is controlled like this than being in suitable scope, then can realize the reduction of the oxygen concentration in the deposited metal, makes the high tenacity and the good weld job of weld metal and deposits.
Claims (4)
1. a flux-cored wire for gas-shielded arc welding is to fill with TiO in the steel crust
2Be that solder flux is that the solder flux of main body forms, it is characterized in that, in quality % with respect to the welding wire gross mass, contain C:0.02～0.15%, Si:0.3～1.4%, Mn:1.2～3.5%, Ni:0.2～3.4%, Cr:0.02～2.0%, Ti:2.0～6.0%, Mo:0.1～2.2% and Mg:0.01～1.0%, and the TiO in the solder flux
2Content [TiO
2] satisfy the relation of following formula (1) with MgO content [MgO],
[TiO
2]/[MgO]≥4.7 …(1)
Wherein, [TiO
2] and [MgO] TiO of being in the solder flux to be comprised
2With the content of MgO with respect to the quality % of welding wire gross mass.
2. flux-cored wire for gas-shielded arc welding according to claim 1 is characterized in that, described TiO
2Content [TiO
2] be 4.5～6.1%, MgO content [MgO] is 0.2～1.5%.
3. flux-cored wire for gas-shielded arc welding according to claim 1 is characterized in that, the filling rate of solder flux is 10～30%.
4. flux-cored wire for gas-shielded arc welding according to claim 2 is characterized in that, the filling rate of solder flux is 10～30%.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006338941 | 2006-12-15 | ||
| JP2006-338941 | 2006-12-15 | ||
| JP2006338941A JP4209913B2 (en) | 2006-12-15 | 2006-12-15 | Flux-cored wire for gas shielded arc welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101204763A CN101204763A (en) | 2008-06-25 |
| CN101204763B true CN101204763B (en) | 2010-06-02 |
Family
ID=39565357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710185054XA Expired - Fee Related CN101204763B (en) | 2006-12-15 | 2007-11-06 | Flux-cored wire for gas-shielded arc welding |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JP4209913B2 (en) |
| KR (1) | KR100925321B1 (en) |
| CN (1) | CN101204763B (en) |
| NL (1) | NL1034833C (en) |
| NO (1) | NO20076432L (en) |
| SE (1) | SE531320C2 (en) |
| SG (1) | SG144044A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5400461B2 (en) * | 2009-04-22 | 2014-01-29 | 株式会社神戸製鋼所 | Flux cored wire |
| JP5384312B2 (en) * | 2009-12-18 | 2014-01-08 | 日鐵住金溶接工業株式会社 | Flux-cored wire for gas shielded arc welding for weathering steel |
| CN102528332B (en) * | 2010-12-20 | 2015-02-04 | 昆山京群焊材科技有限公司 | High-strength low-temperature-resistant TiO2-series CO2 gas-shielded low-hydrogen type flux-cored wire |
| JP6322093B2 (en) * | 2014-09-03 | 2018-05-09 | 株式会社神戸製鋼所 | Flux-cored wire for gas shielded arc welding |
| JP6809533B2 (en) | 2016-11-08 | 2021-01-06 | 日本製鉄株式会社 | Flux-cored wire, welded joint manufacturing method, and welded joint |
| CN107378305A (en) * | 2017-07-31 | 2017-11-24 | 西安理工大学 | Titanium-steel dissimilar metal plate sheet welding flux-cored wire and preparation method thereof |
| CN109084121A (en) * | 2018-09-20 | 2018-12-25 | 张家港市方圆管业制造有限公司 | A kind of corrosion-resistant welded still pipe |
| KR102197132B1 (en) * | 2019-11-26 | 2020-12-31 | 주식회사 세아에삽 | Stainless steel flux cored wire for welding LNG tank |
| JP2022120717A (en) * | 2021-02-05 | 2022-08-18 | 株式会社神戸製鋼所 | Flux-cored wire, weld metal, gas shielded arc welding method and welded joint manufacturing method |
| JP2022121317A (en) * | 2021-02-08 | 2022-08-19 | 株式会社神戸製鋼所 | Wire with flux for gas shield arc-welding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4366364A (en) * | 1979-09-04 | 1982-12-28 | Kobe Steel, Ltd. | Flux-cored wire for use in gas-shielded arc welding |
| CN1476953A (en) * | 2002-07-26 | 2004-02-25 | ��ʽ�������Ƹ��� | Powder care solder wire for gas protective arc welding |
| CN1775452A (en) * | 2005-11-24 | 2006-05-24 | 武汉铁锚焊接材料股份有限公司 | Carbon steel cored solder wire for gas-shielded arc welding |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61283493A (en) * | 1985-06-10 | 1986-12-13 | Daido Steel Co Ltd | Flux-cored wire for welding |
| JP2614969B2 (en) * | 1993-03-31 | 1997-05-28 | 株式会社神戸製鋼所 | Gas shielded arc welding titania-based flux cored wire |
| KR100294454B1 (en) | 1997-03-27 | 2002-11-18 | 가부시키 가이샤 고베세이코쇼 | Flux-cored wire for electrogas arc welding |
| KR100436489B1 (en) | 2001-05-28 | 2004-06-22 | 고려용접봉 주식회사 | Flux cored wire for gas shielded arc welding of high tensile strength steel |
| JP4531617B2 (en) | 2005-04-07 | 2010-08-25 | 日鐵住金溶接工業株式会社 | Flux-cored wire for gas shielded arc welding |
| JP5005309B2 (en) * | 2006-10-02 | 2012-08-22 | 株式会社神戸製鋼所 | Gas shielded arc welding flux cored wire for high strength steel |
-
2006
- 2006-12-15 JP JP2006338941A patent/JP4209913B2/en not_active Expired - Fee Related
-
2007
- 2007-11-06 CN CN200710185054XA patent/CN101204763B/en not_active Expired - Fee Related
- 2007-12-03 SG SG200718275-1A patent/SG144044A1/en unknown
- 2007-12-06 SE SE0702712A patent/SE531320C2/en not_active IP Right Cessation
- 2007-12-13 NO NO20076432A patent/NO20076432L/en not_active Application Discontinuation
- 2007-12-14 KR KR1020070130559A patent/KR100925321B1/en not_active IP Right Cessation
- 2007-12-17 NL NL1034833A patent/NL1034833C/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4366364A (en) * | 1979-09-04 | 1982-12-28 | Kobe Steel, Ltd. | Flux-cored wire for use in gas-shielded arc welding |
| CN1476953A (en) * | 2002-07-26 | 2004-02-25 | ��ʽ�������Ƹ��� | Powder care solder wire for gas protective arc welding |
| CN1775452A (en) * | 2005-11-24 | 2006-05-24 | 武汉铁锚焊接材料股份有限公司 | Carbon steel cored solder wire for gas-shielded arc welding |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20080055714A (en) | 2008-06-19 |
| KR100925321B1 (en) | 2009-11-04 |
| CN101204763A (en) | 2008-06-25 |
| JP4209913B2 (en) | 2009-01-14 |
| SE531320C2 (en) | 2009-02-24 |
| SG144044A1 (en) | 2008-07-29 |
| NL1034833A1 (en) | 2008-06-17 |
| JP2008149341A (en) | 2008-07-03 |
| NL1034833C (en) | 2010-04-26 |
| NO20076432L (en) | 2008-06-16 |
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