CN110402177A - Arc welding method - Google Patents
Arc welding method Download PDFInfo
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- CN110402177A CN110402177A CN201880014586.3A CN201880014586A CN110402177A CN 110402177 A CN110402177 A CN 110402177A CN 201880014586 A CN201880014586 A CN 201880014586A CN 110402177 A CN110402177 A CN 110402177A
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- welding method
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Classifications
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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
- 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
-
- 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
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
-
- 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
-
- 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
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/073—Stabilising the arc
-
- 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
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
It is that can reduce the generation of splashing it is an object of that present invention to provide a kind of arc welding method, and even if accelerating speed of welding, slag coherency also good arc welding method.One embodiment of the present invention is related to arc welding method, it is the arc welding method for carrying out giving control and welding steel on advance and retreat direction for welding wire, wherein, using following welding wire and containing the gas of Ar, make frequency 35Hz or more, the 160Hz or less in the advance and retreat direction of welding wire and is welded, the welding wire contains C, and contain Si:0.2% or more, 1.3% or less in terms of quality %, Mn:0.2% or more, 1.5% or less, with S:0.01% or more, 0.05% hereinafter, surplus is made of Fe and inevitable impurity.
Description
Technical field
The present invention relates to arc welding methods.
Background technique
As the arc welding method that can reduce splashing generation of the sheet metal in welding, it is known to control welding wire on one side and exist
The arc welding method of arc welding method and pulse control mode that giving on advance and retreat direction is welded on one side.
For example, disclose a kind of welding method in patent document 1, as seeking the stomata for inhibiting aperture blowing etc. to occur and
Splash the arc welding method occurred, is the component for carrying out surface treatment, using the welding wire of welding, repeats short circuit and rises
Arc and the welding method for carrying out arc welding.In the welding method, have: make welding wire be formed by the droplet transfer to component side step
Suddenly；Push fusion pool to the direction opposite with welding direction of travel and makes to arrange from the gas that the component occurs from position occurs
Out, the step of so component being welded.Then, it is given by the retrogressing of welding wire, makes the distance between welding wire and fusion pool
It in prescribed limit, and supplies and is used in the defined welding current that the arc force for pushing fusion pool generates, the welding current is made to exist
It keeps certain between specified time limit, or is allowed to slowly increase or decrease.
In addition, for example, a kind of gas-shielded arc welding method is disclosed in patent document 2, as splashing when welding
Generation it is few, welding operability also excellent welding method, using the welding wire with regulation chemical composition, by indifferent gas
The mixed gas of body and carbon dioxide carries out pulse MAG welding as protective gas, by pulsed arc mode.Here, special
In gas-shielded arc welding method described in sharp document 1, the viewpoint of inhibition and welding defect from splashing occurrence quantity prevented goes out
Hair, pulse frequency are preferably controlled in 60~120Hz.In addition, from the viewpoint of the inhibition of splashing occurrence quantity and fusion penetration stability,
Pulse width is preferably controlled in 1.0~1.3msec.
Citation
Patent document
Patent document 1: No. 6043969 bulletin of Japan's patent
Patent document 2: No. 3523917 bulletin of Japan's patent
But in the steel plate used in automobile, building materials and electrical equipment etc., there are the feelings for implementing electroplating work procedure after arc welding
Condition.In this case, if weld part of the slag in arc welding does not agglomerate sufficiently, weld part remaining has slag.Then,
If weld part remaining slag, there will be the adhesion for being formed by film through plating thereafter that cannot substantially ensure such ask
Topic.Therefore, such on the way, it is desirable that slag coherency when welding is good.
But in the arc welding method described in patent document 1 and 2, the coherency of slag is not studied sufficiently, still
There is room for improvement.That is, slag is in weld part remaining, as a result, being likely to occur when slag is without being sufficiently aggregated when welding
Above-mentioned problem.Especially in the welding of thin plate, also require speed of welding fast, although also requiring to accelerate speed of welding, slag
Coherency is also good.
Summary of the invention
It is done currently invention addresses above-mentioned such situation, it is intended that a kind of generation that can reduce splashing is provided,
And even if accelerating speed of welding, slag coherency also good arc welding method.
It is that welding wire is carried out to give control along advance and retreat direction the first embodiment of the present invention is related to a kind of arc welding method
System, and the arc welding method of welding steel, wherein use following welding wire and the gas containing Ar, make the advance and retreat side of the welding wire
To frequency be 35Hz or more, 160Hz or less and welded,
Contain C in the welding wire, also, in terms of quality %, contains
Si:0.2% or more, 1.3% hereinafter,
Mn:0.2% or more, 1.5% hereinafter, and
S:0.01% or more, 0.05% hereinafter,
Surplus is made of Fe and inevitable impurity.
In the preferred mode of first embodiment of the invention, welding wire can also contain Al in terms of quality %:
0.1% or more, 0.5% hereinafter, Mo:0.1% or more, 2.0% hereinafter, Ti:0.3% hereinafter, among Cu:0.4% or less at least
One.
In addition, in the preferred mode of first embodiment of the invention, the content of S and Al in welding wire can also be with
Meet 0.3≤S × 10+Al≤0.7.
In addition, in the preferred mode of first embodiment of the invention, the plate thickness of steel plate be also possible to 0.6mm with
Upper, 5mm or less.
In addition, the advance and retreat direction of welding wire can also be made in the preferred mode of first embodiment of the invention
Frequency be 45Hz or more, 130Hz hereinafter, more preferably 70Hz or more, 110Hz or less and welded.
In addition, the average value of welding current can also be made in the preferred mode of first embodiment of the invention
For 80A or more, 350A hereinafter, making speed of welding 60cm/min or more and being welded.
Second embodiment of the present invention is related to a kind of arc welding method, is to carry out electricity for steel plate with pulse control mode
The arc welding method of arc-welding, wherein use following welding wire and the gas containing Ar, make voltage pulse frequency 50Hz or more,
200Hz hereinafter, make Voltage Pulse Width 1.5ms or more, 10ms or less and welded,
The welding wire contains C, also, in terms of quality %, contains
Si:0.2% or more, 1.1% hereinafter,
Mn:0.2% or more, 1.4% hereinafter, and
S:0.010% or more, 0.050% hereinafter,
Surplus is made of Fe and inevitable impurity.
In the preferred mode of second embodiment of the present invention, welding wire can also contain Al in terms of quality %:
0.1% or more, 0.5% hereinafter, Mo:0.1% or more, 2.0% hereinafter, among Cu:0.4% or less at least one.
In addition, in the preferred mode of second embodiment of the present invention, can also make peak point current 380A with
Upper, 490A or less and welded.
In addition, in the preferred mode of second embodiment of the present invention, can also make background current 80A with
Upper, 180A or less and welded.
In addition, the duty ratio of pulse current can also be made in the preferred mode of second embodiment of the present invention
It is welded for 0.2 or more, 0.6 or less.
In addition, in the preferred mode of second embodiment of the present invention, the plate thickness of steel plate be also possible to 0.6mm with
Upper, 5mm or less.
Arc welding method according to the present invention can reduce the generation of splashing, and even if accelerating speed of welding, slag is solidifying
Poly- property is also good.
Specific embodiment
Hereinafter, being illustrated in detail to mode for carrying out the present invention.In addition, the present invention is not by reality described below
The mode of applying limits.
[first embodiment]
The arc welding method (hereinafter also referred to as the welding method of first embodiment) of first embodiment of the invention,
It is that welding wire is carried out to give control, and the arc welding method of welding steel along advance and retreat direction, wherein using following welding wire and contain
The gas of Ar makes frequency 35Hz or more, the 160Hz or less in the advance and retreat direction of welding wire and is welded, contained in the welding wire
C, and in terms of quality % containing Si:0.2% or more, 1.3% hereinafter, Mn:0.2% or more, 1.5% hereinafter, and S:0.01%
Above, 0.05% hereinafter, surplus is made of Fe and inevitable impurity.
In the welding method of first embodiment, giving and carrying out arc welding for the advance and retreat direction of welding wire is controlled.More
It says to body, exactly repeats to operate as follows: controlling welding wire on advance and retreat direction and give, and make electric arc, while before making welding wire
Into (just sending), contact the molten metal of the welding wire front end of melting with fusion pool after making electric arc disappearance, keep welding wire retrogressing (inverse
Send) and make molten metal transition.By so being welded, the generation of splashing when welding can be reduced.In addition, first implements
The frequency in the advance and retreat direction of welding wire in the welding method of mode is by the primary advance (just sending) of welding wire and to retreat (inverse to send) conduct
1 period is provided.In the welding method of first embodiment, it may for example comprise cold metal transfer (Cold Metal
Transfer) welding etc..
< welding wire >
Then, welding wire used in the welding method below for first embodiment is (hereinafter also referred to as first embodiment
Welding wire, or be only called welding wire) the restriction reason of content of each element be illustrated.In addition, the content of these each elements, is
Content relative to welding wire gross mass.In addition, in the present specification, the percentage (quality %) on the basis of quality, and with weight
Percentage (weight %) on the basis of amount is synonymous.
(C)
C is the element for improving intensity.In the welding wire of first embodiment, C is contained, i.e. the content of C is higher than
0%, but in order to better play said effect, preferably 0.02 mass % or more, more preferably 0.04 mass % or more.
In addition, the upper limit of the content of C is not particularly limited, but from the viewpoint of reducing and splashing and inhibit fire check etc., C
Content be preferably 0.15 mass % hereinafter, more preferably 0.10 mass % or less.
(Si)
Si is effective deoxidier, is integral element in the deoxidation of welding metal.If the content of Si is lower than 0.2
Quality %, then deoxidation effect is impaired, and surface tension reduces, and gas hole defect as pit and aperture blowing is easy to happen.In addition, slag
Coherency reduces.Therefore, the content of Si is 0.2 mass % or more, preferably 0.3 mass % or more, more preferably 0.5 mass %
More than.
On the other hand, Si, which possesses, is characterized in, content is lower, and the resistance of welding wire is lower, and the resistance of welding wire is lower, and welding wire is got over
Be difficult to melt (resistance heat is lower), it is therefore desirable to welding current become larger, as a result, since arc force is got higher, so as to
Inhibit the gas hole defect of pit, aperture blowing etc..In addition, if the content of Si is higher than 1.3 mass %, the slag amount that welding bead surface occurs
Become more, slag coherency also reduces.Therefore, the content of Si is 1.3 mass % hereinafter, preferably 1.2 mass % are hereinafter, more preferably
For 1.0 mass % or less.
(Mn)
Mn be with the equally valid deoxidier of Si, be to be easy element in conjunction with S.If the content of Mn is lower than 0.2 mass %,
Then deoxidation, desulfurization effect are impaired, and surface tension reduces, and are easy to happen gas hole defect as pit and aperture blowing.In addition, slag is solidifying
Poly- property reduces.Therefore, the content of Mn be 0.2 mass % or more, preferably 0.3 mass % or more, more preferably 0.5 mass % with
On.
On the other hand, if the content of Mn is higher than 1.5 mass %, the thin oxidation for making welding bead surface be difficult to remove
Film.In addition, slag coherency reduces.Therefore, the content of Mn is 1.5 mass % hereinafter, preferably 1.3 mass % are hereinafter, more excellent
It is selected as 1.1 mass % or less.
(S)
S contributes to the element of the cohesion of slag, but when being lower than 0.01 mass %, cannot get this effect, therefore S contains
Amount is 0.01 mass % or more, preferably 0.02 mass % or more.
On the other hand, if the content of S is higher than 0.05 mass %, the flowing for melting pool surface is significantlyd change, and slag is close
Neighborhood is just being descended to electric arc and high vibration, as a result, flocculating result reduces.Therefore, the content of S be 0.05 mass % hereinafter,
Preferably 0.04 mass % or less.
The surplus of the welding wire of first embodiment is made of Fe and inevitable impurity, inevitably miscellaneous as this
Matter, can enumerate P, Cr, Ni, N, O etc., and permission is not interfering the range of effect of the invention to contain.
In addition, in the welding wire of first embodiment, other than above-mentioned chemical component, can also also add it is following at
At least one divided.
(Al)
Al contributes to the element of slag cohesion.In the welding wire of first embodiment, the addition of Al is not required, but Al
Content when being lower than 0.1 mass %, it is difficult to when obtaining the flocculating result of slag, therefore adding Al, content is preferably 0.1 matter
Measure % or more, more preferably 0.2 mass % or more.
On the other hand, if the content of Al is higher than 0.5 mass %, molten drop is unstable from taking off, the vibration disorder of fusion pool, flies
Splash it is multiple, as a result, slag flocculating result is likely to decrease.Therefore, when adding Al, preferably make 0.5 mass % of its content
Hereinafter, more preferably 0.4 mass % or less.
(Mo)
Mo contributes to the element of intensity raising.In the welding wire of first embodiment, the addition of Mo is not required, but is
Play this effect well, when adding Mo, preferably make its 0.1 mass % of content or more, more preferably 0.3 mass % with
On.
On the other hand, if Mo is higher than 2.0 mass %, intermetallic compound is formed with Fe at high temperature, therefore effect is full
With.Therefore, when adding Mo, preferably make 2.0 mass % of its content hereinafter, more preferably 1.5 mass % or less.
(Ti)
Ti is strong deoxidant element, reduces the oxygen amount of molten metal, surface tension can be made to reduce, therefore the oxygen in welding wire
Measure high Shi Youxiao.But if being higher than 0.3 mass % and adding, slag largely occurs.Therefore, when adding Ti, preferably contain it
Amount is 0.3 mass % hereinafter, more preferably 0.2 mass % or less.
(Cu)
Cu is effective element for the raising of powered, rust quality.When containing Cu, the lower limit value of content is not special
It limits, but in order to obtain this effect, preferably 0.1 mass % or more better.In addition, from the generation for inhibiting fire check
Viewpoint is set out, and the content of Cu is preferably 0.4 mass % or less.In addition, having reality according to demand in the welding wire of first embodiment
The case where plating Cu.Here, Cu is the total value in part for including part in the base material of welding wire and plating Cu.
(0.3≤S×10+Al≤0.7)
In addition, the content of the welding wire of first embodiment, preferably S and Al meets following relational expressions.At this moment, S and Al
Content is adjusted in a manner of meeting the relational expression, thus it enables that slag coherency is better.
0.3≤S×10+Al≤0.7
(diameter of welding wire)
In the first embodiment, the diameter of welding wire is not particularly limited, and is suitable for that selection is from usually applicable range
It can.The diameter of welding wire is, for example, 0.8mm~1.4mm.In addition, also the same in aftermentioned second embodiment.
(manufacturing method of welding wire)
As the manufacturing method of welding wire, for example, by the wire rod wire drawing of the steel with composition requirement to defined straight
Diameter.Wire drawing is that the method using casement and any of the method using roller die are ok.In addition, implementing plating Cu
When, wire drawing can also be carried out after plating Cu.In addition, also the same in aftermentioned second embodiment.
< protective gas >
The protective gas of welding method for first embodiment contains Ar, can also only be made of Ar.Alternatively,
Other than Ar, CO can also be contained2And O2Deng for example, it is also possible to use the CO of 5~30 volume % or so2Or O2, surplus is
The protective gas of Ar.In addition, can also include the N as inevitable impurity in protective gas2、H2Deng.
Here, the content ratio of the Ar in protective gas is higher, slag amount is more reduced, and therefore, it is desirable to the Ar in protective gas
Content ratio it is high.From this viewpoint, the content ratio of Ar is preferably 70 volume % or more, more preferably 80 volume % with
On.On the other hand, as above-mentioned, protective gas can also be only made of Ar (that is, the content ratio of Ar is also possible to 100 bodies
Product %), but can also for example make the 70 volume % of content ratio or less of Ar.In addition, in aftermentioned second embodiment
Equally.
The frequency > in the advance and retreat direction of < welding wire
In the welding method of first embodiment, in when the giving of advance and retreat direction of control welding wire, make the advance and retreat of welding wire
The frequency in direction is controlled for 35Hz or more, 160Hz or less.
The present inventors' sharp study as a result, it has been found that, the eigentone of molten metal is tens of Hz or so, is passed through
The frequency in the advance and retreat direction of welding wire is controlled in appropriate range in a manner of the eigentone for meeting fusion pool, then is melted
The vibration of pool surface is best, and the molten metal flowing for melting pool surface is changed in a manner of involving in slag, slag can be made to agglomerate
Property is good.When the frequency in the advance and retreat direction of welding wire is lower than 35Hz, the short circuit during peak point current is multiple, not can be carried out the molten of rule
Drip transition, the vibration disorder of fusion pool, good slag coherency in order to obtain, the frequency in the advance and retreat direction of welding wire be 35Hz with
On, preferably 45Hz or more, more preferably 70Hz or more.On the other hand, if the frequency in the advance and retreat direction of welding wire is higher than 160Hz,
Then the pressing effect of the electric arc bring fusion pool during peak value reduces, and cannot obtain the amplitude of enough fusion pools, cannot get
Good slag coherency, therefore the frequency in the advance and retreat direction of welding wire is 160Hz hereinafter, preferably 150Hz is hereinafter, more preferably
130Hz is hereinafter, further preferably 110Hz or less.
< base material >
It is steel plate as the base material of welding object in the welding method of first embodiment, the group about steel plate
It is not particularly limited at, plate thickness etc., but for example plate thickness 0.6mm or more, 5.0mm sheet metal below etc. can also be applied.In addition,
It as steel grade, such as can be mild steel, be also possible to reach 590MPa grades of high tension steel etc..In addition, to the surface of base material,
The zinc-plated or various platings such as aluminize can be implemented.In addition, also the same in aftermentioned second embodiment.
< welding condition >
In addition, in the welding method of first embodiment, welding current, weldingvoltage, speed of welding, welding posture etc.
Each welding condition be not particularly limited, in the range that arc welding method can be applicable in be suitable for adjustment.
Here, the average value as welding current, for example, 80A or more, 350A are hereinafter, preferably 100A or more, 300A
Below.In addition, as speed of welding, for example, 60cm/min or more.Welding method according to first embodiment, in these welderings
Under the conditions of connecing, it can implement to weld with good slag coherency.
[second embodiment]
The arc welding method (hereinafter also referred to as the welding method of second embodiment) of second embodiment of the present invention,
It is the arc welding method for carrying out arc welding with pulse control mode for steel plate, wherein following welding wire and the gas containing Ar are used,
Make voltage pulse frequency 50Hz or more, 200Hz hereinafter, making Voltage Pulse Width 1.5ms or more, 10ms or less and being welded
It connects, C is contained in the welding wire, and contain Si:0.2% or more, 1.1% hereinafter, Mn:0.2% or more, 1.4% in terms of quality %
Hereinafter, and S:0.010% or more, 0.050% hereinafter, surplus is made of Fe and inevitable impurity.
< welding wire >
The content of each element of the welding wire of welding method for second embodiment and its appropriate range are for example following.Number
The reasons why value limits is same as first embodiment.
(C)
Lower limit: it is higher than 0%, preferably 0.02 mass % or more, more preferably 0.04 mass % or more
The upper limit: preferably 0.15 mass % is hereinafter, more preferably 0.10 mass % or less
(Si)
Lower limit: 0.2 mass % or more, preferably 0.3 mass % or more, more preferably 0.5 mass % or more
The upper limit: 1.1 mass % hereinafter, preferably 1.0 mass % hereinafter, more preferably 0.9 mass % or less (Mn)
Lower limit: 0.2 mass % or more, preferably 0.3 mass % or more, more preferably 0.5 mass % or more
The upper limit: 1.4 mass % hereinafter, preferably 1.3 mass % hereinafter, more preferably 1.1 mass % or less (S)
Lower limit: 0.010 mass % or more, preferably 0.020 mass % or more
The upper limit: 0.050 mass % is hereinafter, preferably 0.040 mass % or less
The surplus of the welding wire of second embodiment is made of Fe and inevitable impurity, inevitably miscellaneous as this
Matter, can enumerate Ti, P, Cr, Ni, N, O etc., and permission contains in the range of not interfering effect of the invention.
In addition, in the welding wire of second embodiment, other than above-mentioned chemical component, can also also add Al, Mo,
At least one of Cu, the suitable range of additive amount and its reason are same as first embodiment.
< pulse control condition >
Next, being illustrated for the pulse control condition in the welding method of second embodiment.
(voltage pulse frequency: 50Hz or more 200Hz or less)
(Voltage Pulse Width: 1.5ms or more 10ms or less)
In the welding method of second embodiment, when carrying out arc welding with pulse control mode, control as follows
Pulse: making voltage pulse frequency (hereinafter, being also only called pulse frequency) is 50Hz or more, 200Hz hereinafter, also, making voltage arteries and veins
Rushing width (hereinafter, being also only called pulse width) is 1.5ms or more, 10ms or less.
It is that the present inventors carry out a intensive study as a result, it has been found that, the eigentone of molten metal is tens of Hz or so,
By in a manner of the eigentone for meeting molten drop, by the frequency of pulse and width control in appropriate range, then fusion pool
Vibration become best, the molten metal for melting pool surface flowing can be made to change in a manner of involving in slag, agglomerate slag
Property reaches good.
If pulse frequency is higher than 200Hz and/or pulse width is lower than 1.5ms, the melting from electric arc during peak value
The pressing effect in pond reduces, and cannot obtain the amplitude of sufficient fusion pool, it is difficult to obtain good slag coherency.Therefore, arteries and veins
Rushing frequency is 200Hz hereinafter, pulse width is 1.5ms or more.Pulse frequency be preferably 180Hz hereinafter, more preferably 150Hz with
Under.In addition, pulse width is preferably 3ms or more, more preferably 5ms or more.
On the other hand, if pulse frequency is lower than 50Hz and/or pulse width is higher than 10ms, elongated, molten drop during peak value
Formation it is excessive, therefore the droplet transfer is unstable, as a result, the vibration disorder of fusion pool, it is difficult to it is solidifying to obtain good slag
Poly- property.It is easy to happen in addition, splashing, and welding bead deteriorated appearance.Therefore, pulse frequency is 50Hz or more, and pulse width is
10ms or less.Pulse frequency is preferably 55Hz or more, more preferably 60Hz or more.In addition, pulse width be preferably 9ms hereinafter,
More preferably 8ms or less.
In addition, controlling pulse current when welding as follows in the welding method of second embodiment.
(peak point current: 380A or more, 490A or less)
During peak point current, while molten drop formation, fusion pool is pressed by arc force.Here, in the second embodiment party
In the welding method of formula, peak point current is not particularly limited, but from the viewpoint of following, preferably 380A or more, 490A with
Under.That is, when peak point current is lower than 380A, it is possible to the sufficient arc force for pressing fusion pool cannot be obtained.Therefore, peak value
Electric current is preferably 380A or more, more preferably 400A or more, further preferably 410A or more.
On the other hand, if peak point current is higher than 490A, the formation of molten drop is excessive, irregularly occurs with fusion pool short
Road, it is possible to regularly fusion pool cannot be made to vibrate.In addition, arc force is excessive, slag is pressed relative to welding direction of travel
The flowing for pressing to rear convection current is possible to become too strong.As a result, the cohesion of slag is possible to be hindered.Therefore, peak value
Electric current is preferably 490A hereinafter, more preferably 480A is hereinafter, further preferably 460A or less.
(background current: 80A or more, 180A or less)
During background current, by reducing arc force, to make to be easy by the molten drop that peak point current is formed from de-.In
This, in the welding method of second embodiment, background current is not particularly limited, but from the viewpoint of following, preferably
80A or more, 180A or less.That is, the range for carrying out electric current is possible to substantially be restricted when background current is lower than 80A.Therefore,
Background current is preferably 80A or more, more preferably 90A or more, further preferably 100A or more.
On the other hand, if background current is higher than 180A, heat input is excessive, is possible to be easy to happen burning when welding thin plate
It wears.Therefore, background current is preferably 180A hereinafter, more preferably 160A is hereinafter, further preferably 150A or less.
(duty ratio: 0.2~0.6)
In addition, the duty ratio of pulse current is not particularly limited in the welding method of second embodiment, but from following
From the perspective of, preferably 0.2~0.6.That is, if duty ratio is lower than 0.2, during peak point current compared with during background current
And it is too short, it is unable to fully obtain the pressing effect of the fusion pool from electric arc, fusion pool cannot be made sufficiently to vibrate, as a result,
Slag flocculating result is likely to decrease.Therefore, the duty ratio of pulse current is preferably 0.2 or more, and more preferably 0.3 or more.
On the other hand, if duty ratio is higher than 0.6, short circuit takes place frequently during peak point current, multiple, the vibration of fusion pool of splashing
It is visibly moved easily irregular, as a result, slag flocculating result has been possible to reduction.Therefore, the duty ratio of pulse current is preferably 0.6
Hereinafter, more preferably 0.5 or less.
In addition, the average current of pulse current is also not particularly limited in the welding method of second embodiment, according to
The suitable decisions such as above-mentioned peak point current, background current and the respective appropriate range of duty ratio.As the flat of pulse current
Equal electric current, for example, 250A or more, 350A or less.
< welding condition >
In addition, each welding condition of speed of welding, welding posture etc. does not limit especially in the welding method of second embodiment
It is fixed, it is suitable for adjustment in the range that can be applicable in arc welding method.
As speed of welding, for example, 70cm/min or more.According to the welding method of second embodiment, even if accelerating weldering
Speed is connect, also can implement to weld with good slag coherency.
Embodiment
Hereinafter, enumerating embodiment further illustrates the present invention, but the present invention is not limited by these embodiments, can be in energy
Enough meet and changed implementation in the range of spirit of the invention, these are all contained in technical scope of the invention.
Hereinafter, illustrating first embodiment by embodiment and comparative example.
Using the welding wire of the diameter 1.2mm with composition shown in Tables 1 and 2, by the frequency on the advance and retreat direction of welding wire
Give control by frequency shown in Tables 1 and 2, and welding is implemented with condition shown in following.
(1) steel plate
Use vertical 200mm × horizontal 60mm × thickness 3.2mm steel plate.In addition, the steel grade of steel plate is SPHC590.
(2) posture is welded
Carrying out horizontal lap fillet welding.
(3) protective gas
In the example 1~28 of table 1 and the example 30~59 of table 2, as protective gas, Ar+20 volume %CO is used2。
In addition, as protective gas, using 100 volume %CO in the example 29 of table 1 and the example 60 of table 22。
(4) welding current and weldingvoltage
With welding current: 240A, weldingvoltage: 18V implements welding.
(5) speed of welding and weld length
Speed of welding is 100cm/min.In addition, weld length: implementation is soldered to 150mm.
In addition, so-called " component of weld wire (quality %) " is indicated in welding wire gross mass in table 1 and 2 and aftermentioned table 3
Each component amount (quality %).In addition, so-called "-" indicates that content is lower than detection limit.In addition, Cu content shown in table 2 and 3
In comprising plating the part Cu.In addition, surplus is Fe and inevitable impurity.
(evaluation of slag coherency)
In weld length 150mm, the slag on welding bead surface is visually observed, the slag on surface is collected, with following standards
It is evaluated.In addition, ◎ and zero is qualification, × it is unqualified.
◎: the slag (cohesion) among slag total amount with the presence of 90 weight % or more is in arc crater portion neighborhood.
Zero: the slag (cohesion) among slag total amount with the presence of 50 weight % or more, lower than 90 weight % is in arc crater portion neighbour
Domain.
×: there is (cohesion) in arc crater portion neighborhood in the slag among slag only lower than 50 weight %.
[table 1]
[table 2]
Among example 1~60, example 1~20 and example 30~51 are embodiments, and example 21~29 and example 52~60 are comparative examples.Such as table
1 and table 2 shown in, in example 1~20 and example 30~51, good slag coherency can be obtained.
In example 21 and example 52, because the S content in welding wire is very few, in addition, in example 22 and example 53, because in welding wire
S content is excessive, so slag coherency deteriorates.
In example 23 and example 54, because the frequency in the advance and retreat direction of welding wire is excessive, in addition, in example 24 and example 55, because
The frequency in the advance and retreat direction of welding wire is too small, so slag coherency deteriorates.
In example 25 and example 56, because the Si content in welding wire is very few, in addition, in example 26 and example 57, because in welding wire
Si content it is excessive, so slag coherency deteriorate.
In example 27 and example 58, because the Mn content in welding wire is very few, in addition, in example 28 and example 59, because in welding wire
Mn content it is excessive, so slag coherency deteriorate.
In example 29 and example 60, because using the 100%CO without containing Ar as protective gas2Gas, so slag is solidifying
Poly- property deterioration.
Then, illustrate second embodiment below by way of embodiments and comparative examples.
Using the welding wire of the diameter 1.2mm with composition shown in table 3, by condition shown in following, pulse is controlled on one side
Implement arc welding on one side.
(1) steel plate
Use vertical 200mm × horizontal 60mm × thickness 3.2mm steel plate.In addition, the steel grade of steel plate is SPHC590.
(2) posture is welded
Carrying out horizontal lap fillet welding.
(3) protective gas
In the example 61~90 and 92~93 of table 3, as protective gas, Ar+20 volume %CO is used2。
In addition, as protective gas, using 100 volume %CO in the example 91 of table 32。
(4) pulse control condition
By condition shown in table 3 control pulse frequency (Hz), pulse width (ms), peak point current (A), background current (A),
Duty ratio, and implement to weld.
(5) speed of welding and weld length
Speed of welding is 100cm/min.In addition, weld length: implementation is soldered to 150mm.
(evaluation of slag coherency)
In weld length 150mm, the slag on welding bead surface is observed by visual observation, collects the slag on surface, slag total amount
Among, presence (cohesion) is acquired in the ratio (weight %) of the slag of arc crater portion neighborhood, is documented in " the slag cohesion ratio of table 3
In the column (weight %) ".Here, if there is (cohesion) in the slag of arc crater portion neighborhood ratio be 60 weight % or more, then
Slag coherency can be evaluated as well.In addition, being lower than 60 weights about there is the ratio of (cohesion) in the slag of arc crater portion neighborhood
Measure %, the undesirable example of slag coherency describes result for "×" in " slag agglomerate ratio (weight %) " column of table 3,
The description of the ratio is omitted.
(evaluation of welding bead appearance)
In addition, evaluating the appearance for welding welding bead obtained in each example with following standards.
◎: the bumps on surface are few, smooth welding bead appearance
Zero: undercut etc., sound welding bead appearance not occurring
×: welding bead boundary is not whole and the bumps on surface etc. occur, welding bead bad order
[table 3]
Among example 61~93, example 61~82 is embodiment, and example 83~93 is comparative example.As shown in table 3, in example 61~82
In, good slag coherency can be obtained.In addition, welding bead appearance is also good.
In example 83, because the S content in welding wire is very few, in addition, in example 84, because the S content in welding wire is excessive, institute
With the deterioration of slag coherency.
In example 85, because pulse frequency is excessive, the deterioration of slag coherency.In addition, in example 86, because of pulse frequency
Rate is too small, so slag coherency deteriorates, welding bead appearance is also bad.
In example 87, because the Si content in welding wire is very few, slag coherency is deteriorated, and welding bead appearance is also bad.Separately
Outside, in example 88, because the Si content in welding wire is excessive, the deterioration of slag coherency.
In example 89, because the Mn content in welding wire is very few, in addition, in example 90, because the Mn content in welding wire is excessive,
So slag coherency deteriorates.
In example 91, because using the 100%CO without containing Ar as protective gas2Gas, so slag agglomerates
Property deterioration.
In example 92, because pulse width is too small, the deterioration of slag coherency.In addition, in example 93, because pulse is wide
It spends greatly, in addition, slag coherency deteriorates because the Mn content in welding wire is excessive, welding bead appearance is also bad.
The present invention is described in detail referring to specific mode, but does not depart from the spirit and scope of the present invention or various to carry out
Change and modification, this will be apparent that for practitioner.In addition, the application is based on Japan Patent Shen filed on March 2nd, 2017
Please (Japanese patent application 2017-039845), Japanese patent application (Japanese patent application filed on March 28th, 2017
2017-063694) and Japanese patent application (Japanese patent application 2017-069238) filed on March 30th, 2017,
It is quoted entirely through reference.In addition, whole reference cited herein is incorporated into as a whole.
Claims (13)
1. a kind of arc welding method is the arc welding method for carrying out giving control and welding steel on advance and retreat direction to welding wire,
Wherein, using following welding wire and containing the gas of Ar, make the frequency 35Hz or more in the advance and retreat direction of the welding wire but 160Hz with
It is welded down,
The welding wire contains C, and is contained in terms of quality %
Si:0.2% or more but below 1.3%,
Mn:0.2% or more but below 1.5% and
S:0.01% or more but 0.05% hereinafter,
Surplus is made of Fe and inevitable impurity.
2. arc welding method according to claim 1, wherein the welding wire is in terms of quality % also containing in following element
At least one:
Al:0.1% or more but below 0.5%,
Mo:0.1% or more but below 2.0%,
Ti:0.3% or less,
Cu:0.4% or less.
3. arc welding method according to claim 2, wherein 0.3≤S of content satisfaction of S and Al in the welding wire ×
10+Al≤0.7。
4. arc welding method according to claim 1, wherein the plate thickness of the steel plate be 0.6mm or more but 5mm with
Under.
5. arc welding method according to claim 1, wherein make the frequency 45Hz or more in the advance and retreat direction of the welding wire
But it is welded in 130Hz or less.
6. arc welding method according to claim 5, wherein make the frequency 70Hz or more in the advance and retreat direction of the welding wire
But it is welded in 110Hz or less.
7. arc welding method described according to claim 1~any one of 6, wherein make the average value 80A of welding current with
Above but in 350A hereinafter, making speed of welding 60cm/min or more and being welded.
8. a kind of arc welding method is the arc welding method for carrying out arc welding to steel plate with pulse control mode, wherein using such as
Lower welding wire and the gas containing Ar make voltage pulse frequency 50Hz or more but in 200Hz hereinafter, making Voltage Pulse Width
It 1.5ms or more but is welded in 10ms or less,
The welding wire contains C, also, is contained in terms of quality %
Si:0.2% or more but below 1.1%,
Mn:0.2% or more but below 1.4% and
S:0.010% or more but 0.050% hereinafter,
Surplus is made of Fe and inevitable impurity.
9. arc welding method according to claim 8, wherein also containing in following element in terms of quality % in the welding wire
At least one:
Al:0.1% or more but below 0.5%,
Mo:0.1% or more but below 2.0%,
Cu:0.4% or less.
10. arc welding method according to claim 8, wherein make peak point current 380A or more but in 490A or less and
It is welded.
11. arc welding method according to claim 8, wherein make background current 80A or more but in 180A or less and into
Row welding.
12. arc welding method according to claim 8, wherein make 0.2 or more the duty ratio of pulse current but 0.6
It is welded below.
13. the arc welding method according to any one of claim 8~12, wherein the plate thickness of the steel plate be 0.6mm with
Above but in 5mm or less.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-039845 | 2017-03-02 | ||
| JP2017039845 | 2017-03-02 | ||
| JP2017063694A JP6892302B2 (en) | 2017-03-28 | 2017-03-28 | Arc welding method |
| JP2017-063694 | 2017-03-28 | ||
| JP2017-069238 | 2017-03-30 | ||
| JP2017069238A JP6892305B2 (en) | 2017-03-02 | 2017-03-30 | Arc welding method |
| PCT/JP2018/008165 WO2018159844A1 (en) | 2017-03-02 | 2018-03-02 | Arc welding method |
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| Publication Number | Publication Date |
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| CN110402177A true CN110402177A (en) | 2019-11-01 |
| CN110402177B CN110402177B (en) | 2021-12-21 |
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| CN201880014586.3A Active CN110402177B (en) | 2017-03-02 | 2018-03-02 | Arc welding method |
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| CN (1) | CN110402177B (en) |
| WO (1) | WO2018159844A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115916446A (en) * | 2020-09-02 | 2023-04-04 | 株式会社神户制钢所 | Arc welding method |
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| CN115916446B (en) * | 2020-09-02 | 2024-01-02 | 株式会社神户制钢所 | Arc welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018159844A1 (en) | 2018-09-07 |
| CN110402177B (en) | 2021-12-21 |
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