CN106001867B - Multi-electrode single-surface single-layer submerged arc soldering method - Google Patents
Multi-electrode single-surface single-layer submerged arc soldering method Download PDFInfo
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- CN106001867B CN106001867B CN201610112908.0A CN201610112908A CN106001867B CN 106001867 B CN106001867 B CN 106001867B CN 201610112908 A CN201610112908 A CN 201610112908A CN 106001867 B CN106001867 B CN 106001867B
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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
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
- B23K9/188—Submerged-arc welding making use of a consumable electrodes making use of several electrodes
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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
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
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Abstract
There is provided it is a kind of be difficult to happen heat cracking in slab, the shape of back bead also good multi-electrode single-surface single-layer submerged arc soldering method.A kind of multi-electrode single-surface single-layer submerged arc soldering method for the welding carrying out single-surface single-layer using multiple electrodes, which is characterized in that welded with following condition, i.e. the polarity of first electrode: electrode flanks negative under direct current；The interelectrode distance L1:80mm or more and 160mm or less of first electrode (15a) and second electrode (15b)；The interelectrode distance L2:80mm or more and 160mm or less of second electrode (15b) and third electrode (15c)；The voltage of first electrode (15a): 25~40V；The electric current of second electrode (15b): 800~1400A.
Description
Technical field
The present invention relates to the multi-electrode single-surface single-layer submerged arc soldering methods for the welding for using multiple electrodes progress single-surface single-layer.
Background technique
Multi-electrode single side submerged-arc welding is the high efficiency centered on shipbuilding, applied to wide range of areas as jigsaw butt welding
Welding procedure method.As the unilateral submerged arc soldering method of multi-electrode for realizing such high efficiency, various welding methods are disclosed.
It for example, disclosing a kind of submerged arc soldering method in patent document 1, is carried out with single or 2 or more electrodes
The submerged arc soldering method of welding, which is characterized in that first electrode is welded using the welding containing 0.01~1 mass % of rare earth element
Silk, makes polarity straight polarity or the exchange of the electrode.
In addition, for example, disclose a kind of multiple-electrode submerged arc weld method in patent document 2, it is more more than three electrodes
In electrode welding, first electrode and second electrode are applicable in gage of wire 3.2mm welding wire below, and first electrode is 800A's or more
Electric current, and make welding current divided by current density obtained by welding wire sectional area, first electrode 145A/mm2More than, second electrode
For 95A/mm2More than.
[existing technical literature]
[patent document]
Patent document 1: Japanese Unexamined Patent Publication 2010-221296 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2007-268564 bulletin
But welding method described in patent document 1, if with alternating current (Alternating Current；AC it) is welded
It connects, then under the influence of constant voltage characteristic, welding wire gives speed without not fixing.Therefore, welding method described in patent document 1
In, there is the shape stability such problems for the back bead for being difficult to ensure slab.In addition, the weldering described in patent document 1
It connects in method, because of the not definition of interelectrode distance, in the presence of being easy to happen heat cracking such problems.
In addition, welding method described in patent document 2, because the gage of wire of first electrode and the welding wire of second electrode are straight
Diameter is thin, so heat input is suppressed, although can expect toughness deterioration and the heat affected area (Heat of heat affected zone
Affected Zone；HAZ the reduction of softening (HAZ softening)), but the fusion penetration width of root narrows, and exists and is easy to happen high temperature
Crackle such problems.In addition, the also not definition of interelectrode distance, therefore and patent of welding method described in patent document 2
Welding method described in document 1, which similarly there are, is easy to happen heat cracking such problems.
In addition, including comprising the patent document 1,2, in existing multi-electrode single-surface single-layer submerged-arc welding, in general,
Have as the shape for becoming slab back bead easily becomes pears type, rises such problems in the incidence of heat cracking.Cause
This, when carrying out the submerged-arc welding of multi-electrode single-surface single-layer, in order to reduce the incidence of heat cracking of plank side, it has to using sacrificial
The condition of the shape of domestic animal back bead.
Summary of the invention
The present invention is formed in view of the issue, and project is, is provided one kind and is difficult to happen in slab
Heat cracking, the shape of back bead also good multi-electrode single-surface single-layer submerged arc soldering method.
The multi-electrode single-surface single-layer submerged arc soldering method of the invention of to solve the problem is to carry out single side using multiple electrodes
The multi-electrode single-surface single-layer submerged arc soldering method of the welding of single layer, which is characterized in that it is welded with following condition, first electrode
Polarity: electrode flanks negative under direct current；The interelectrode distance of first electrode and second electrode: 80mm or more and 160mm or less；Second
The interelectrode distance of electrode and third electrode: 80mm or more and 160mm or less；The voltage of first electrode: 25~40V；Second electricity
The electric current of pole: 800~1400A.
In this way, multi-electrode single-surface single-layer submerged arc soldering method of the invention because make the polarity of first electrode, first electrode and
The interelectrode distance of second electrode, the interelectrode distance of second electrode and third electrode, the voltage of first electrode, second electrode
Electric current can make the shape of back bead good for specific condition so heat cracking is difficult to happen.
Multi-electrode single-surface single-layer submerged arc soldering method of the invention, the gage of wire of the preferably described first electrode be φ 4.0~
6.4mm。
According to such welding method, it can be achieved that stable fusion penetration, back bead are more stable.In addition, according to such weldering
Method is connect, can substantially ensure the fusion penetration width of root, therefore even if can also heat cracking be made to be more difficult to when welding slab
Occur.
Multi-electrode single-surface single-layer submerged arc soldering method of the invention, the gage of wire of the preferably described second electrode be φ 4.0~
6.4mm, the gage of wire of the third electrode are 4.0~6.4mm of φ.
According to such welding method, it can be achieved that stable fusion penetration, back bead are more stable.In addition, according to such weldering
Method is connect, can substantially ensure the fusion penetration width of root, therefore even if can also heat cracking be made to be more difficult to when welding slab
Occur.
Multi-electrode single-surface single-layer submerged arc soldering method of the invention, the electric current of the preferably described first electrode are 1000~1600A.
According to such welding method, first electrode is not up to excessive current, and current value is in range appropriate, therefore
Back bead is more stable.In addition, according to such welding method, because the fusion penetration width of root can be fully ensured,
Even if weld slab, also heat cracking can be made to be more difficult to occur.
Multi-electrode single-surface single-layer submerged arc soldering method of the invention, the voltage of the preferably described second electrode are 40~50V.
According to such welding method, second electrode is not up to too high voltages, and voltage value is in range appropriate, therefore
Back bead is more stable.In addition, according to such welding method, because the fusion penetration width of root can be substantially ensured, i.e.,
When making to weld slab, also heat cracking can be made to be more difficult to occur.
Multi-electrode single-surface single-layer submerged arc soldering method of the invention, the polarity of the preferably described second electrode is alternating current, described
The polarity of third electrode is alternating current.
According to such welding method, the chemical component of welding wire can be made largely to be retained in welding metal, therefore welded
The yield of the chemical component of metal is more stable, and mechanical property (specifically impact property (toughness)) can be made good.
Multi-electrode single-surface single-layer submerged arc soldering method of the invention, because all conditions of polarity of first electrode etc. have been determined,
So being difficult to happen heat cracking in slab, the shape of back bead can be made also good.
Detailed description of the invention
Fig. 1 is the sectional view for the welder of multi-electrode single-surface single-layer submerged arc soldering method of the invention.
Fig. 2 is the top view of the steel plate welded with multi-electrode single-surface single-layer submerged arc soldering method of the invention.
The sectional view on the steel plate periphery for the case where Fig. 3 is when indicating to carry out the submerged-arc welding of multi-electrode single-surface single-layer.
The sectional view on the steel plate periphery for the case where Fig. 4 is when indicating to carry out the submerged-arc welding of multi-electrode single-surface single-layer.
Fig. 5 is for the interelectrode distance and the prominent length of welding wire in just multi-electrode single-surface single-layer submerged arc soldering method of the invention
Spend the sectional view being illustrated.
Fig. 6 is the sectional view on the steel plate periphery being illustrated for the high-temperature cracking resistance with regard to embodiment.
Specific embodiment
Hereinafter, the mode for implementation of the invention is illustrated in detail.Multi-electrode single-surface single-layer submerged arc of the invention
Soldering method (hereinafter, be also only called " welding method " sometimes.), for example, being the weldering for carrying out single-surface single-layer using 3 or 4 electrodes
The method connect.Moreover, in welding method of the invention, it is determined that the polarity of electrode, interelectrode distance, the voltage of electrode, electrode
Electric current, gage of wire and the polarity etc. of electrode has been determined as preferred mode.
Firstly, being just illustrated for the outline and steel plate of the major part of the welder of welding method of the invention.
(welder)
As shown in Figure 1, welder 100, mainly has pier base frame 11, welding machine 12, welding machine crossbeam 13.
Pier base frame 11 sees that concave mode is formed using the square material of steel as framework with section, and top is open, interior
Portion is supported with Fig. 3, cushion device 50a shown in Fig. 4 or cushion device 50b.Then, in the liner copper sheet 55 of cushion device 50a
Or steel plate 20 is placed on the fire-resistant tarpaulin 56 of cushion device 50b.
Welding machine crossbeam 13 moves welding machine 12 along the longitudinally of steel plate 20.
Welding machine 12 is configured in the top (top of steel plate 20) of pier base frame 11, from the welding groove portion M (reference of steel plate 20
Surface side welding steel 20 Fig. 2).Welding machine 12 has multiple electrodes (welding torch) 15.12 one side of welding machine along welding machine crossbeam 13 with
Fixing speed is mobile, on one side from the surface side of welding groove portion M, passes through single side submerged arc welding steel plate 20 by electrode 15.In addition,
Welding machine 12 shown in FIG. 1 moves from left to right on one side as shown in the arrow in figure, carries out the welding of steel plate 20 on one side.
Here, multi-electrode single-surface single-layer submerged arc soldering method belonging to the present invention is as shown in Figure 3, Figure 4 from docked
The back side of steel plate 20 and steel plate 20 intersperses among the liner solder flux 52 on liner copper sheet 55 with stratiform, or is housed in fire-resistant tarpaulin 56
Interior liner solder flux 52 presses the method welded with single layer by the push-up mechanism of air hose 59 etc..In multi-electrode
In single-surface single-layer submerged arc soldering method, from the surface side of steel plate 20 using table solder flux 51 carry out submerged-arc welding, steel plate 20 surface with
The back side is formed simultaneously welding bead.In addition, symbol 53 is slag in Fig. 3, Fig. 4, symbol 54 is welding metal, and symbol 57 is heat-resisting
Cover, symbol 58 is backing solder flux.
(steel plate)
As steel plate 20, it can be mentioned, for example ship plate is made, length is, for example, 10~30m.As shown in Fig. 2, for this
Steel plate 20 abuts each other steel plate 20, in the position of welding groove portion M, carries out tack welding in interrupted or continuous face.
At the beginning of the steel plate 20 31 and terminal 32, the run-on tab (Japanese original text: タ Block) 21 for handling arc crater is installed
With run-on tab 22.
(welding method)
Welding method of the invention is welded using the welder with following condition, the polarity of first electrode:
Electrode flanks negative under direct current；The interelectrode distance of first electrode and second electrode: 80mm or more and 160mm or less；Second electrode
With the interelectrode distance of third electrode: 80mm or more and 160mm or less；The voltage of first electrode: 25~40V；Second electrode
Electric current: 800~1400A.
In addition, mainly using solid core welding wire in submerged-arc welding, it is specific that gage of wire is limited to φ 4.8mm, φ 6.4mm etc.
Nominal diameter.Then, about actual diameter, generally as the extensive interpretation comprising error range diameter.Here, in JIS Z
In 3200:2005, the franchise of solid core welding wire (φ 3.2mm, φ 4.0mm, φ 4.8mm, φ 6.4mm) used for submerged arc welding is ±
0.06mm.Therefore, gage of wire specified in the present invention includes the error of ± φ 0.06mm as actual diameter.That is, for example,
So-called gage of wire is 4.0mm φ, is meaned as actual diameter
" φ 4.0mm ± φ 0.06mm ", so-called gage of wire are φ 4.8mm, mean " φ 4.8mm as actual diameter
± φ 0.06mm ", so-called gage of wire are φ 6.4mm, mean " φ 6.4mm ± φ 0.06mm " as actual diameter.In addition,
As the welding wire for each electrode, it is preferable to use solid core welding wires.In this way, fusion penetration is deep, resistance to hygroscopicity is also good.
The electrode 15 of welding machine 12, such as shown in figure 5, from welding direction of travel (in figure, direction shown in arrow) by suitable
Sequence has first electrode 15a, second electrode 15b, third electrode 15c this 3.In addition, electrode 15, can also have as needed
4 including standby the 4th electrode 15d shown in the dotted line in Fig. 5.If have the 4th electrode 15d, then it can make to melt
Pond (fusion pool) Sheng get Geng is full.Although electrode 15 can be arbitrarily set as to 3 or 4, effect of the invention is can to lead to
Crossing, which makes first electrode 15a, second electrode 15b, third electrode 15c be set as above-mentioned condition, is reached.
Here, making as shown in figure 5, so-called interelectrode distance L1, L2 refer in the configuration of the electrode 15 when being welded
Extend as it is respectively from the front end of each electrode 15a~15c welding wire 16a~16c outstanding and the position that is contacted with steel plate 20
Distance is (in addition, indicate the extended part in the front end of welding wire 16a~16c with thin dotted line respectively in Fig. 5.).
Protrusion length A1~A3 of welding wire 16a~16c is not particularly limited, and can set in usual range.Electrode
The protrusion length A4 of 15 welding wire 16d when having a 4th electrode 15d is also the same.
Hereinafter, being illustrated for each condition.
(polarity of first electrode)
The polarity of first electrode is direct current electrode negative (Direct Current Electrode Negative；
DCEN)。
If making the polarity DCEN of first electrode, welding wire can be made to give speed and fixed, therefore back bead is stablized.Separately
Outside, more with the welding wire deposition amount under electric current, the chemical component of welding wire is largely retained in welding metal, therefore can be impacted
Performance.
If making the polarity alternating current (AC) of first electrode, welding wire is given speed and is not fixed, therefore in high current zone
Unstable, back bead is unstable.
If making polarity direct current electrode positive (the Direct Current Electrode Positive of first electrode；
DCEP), then fusion penetration width is narrow, therefore back bead is unstable.In addition, in this case, welding wire deposition amount is few, welding metal
In the yield of chemical component of welding wire tail off, therefore excellent impact property cannot be obtained.
(interelectrode distance of first electrode and second electrode)
The interelectrode distance L1 of first electrode 15a and second electrode 15b is 80mm or more and 160mm or less.If making electrode
Between distance L1 in this range, then the electric arc of the electric arc of first electrode 15a and second electrode 15b do not interfere, thus the back side weld
Stablize in road.In addition, the interval of first electrode 15a and second electrode 15b are appropriate if making interelectrode distance L1 in this range, because
This cooling time is appropriate, and the welding of second electrode 15b is just able to carry out before molten bath does not solidify.Therefore, in second electrode
It can deepen fusion penetration in the welding of 15b.Therefore, heat cracking can be made to be difficult to happen.
If interelectrode distance L1 is lower than 80mm, the electric arc of first electrode 15a and the electric arc of second electrode 15b occur dry
It disturbs, therefore back bead is unstable.In addition, if interelectrode distance L1 is higher than 160mm, first electrode 15a and second electrode 15b
Be spaced away from, therefore cooling time is elongated, molten bath solidification.Therefore, fusion penetration shoals in the welding of second electrode 15b, high temperature
Crackle occurs.
In addition, the lower limit of interelectrode distance L1 is preferably 90mm from the viewpoint of keeping back bead more stable, the upper limit is excellent
It is selected as 140mm, more preferably 120mm.
(interelectrode distance of second electrode and third electrode)
The interelectrode distance L2 of second electrode 15b and third electrode 15c are 80mm or more and 160mm or less.If making electrode
Between distance L2 in this range, then the interval of second electrode 15b and third electrode 15c are appropriate, therefore cooling time is appropriate, in molten bath
The welding of third electrode 15c is just able to carry out before not solidifying.Therefore, can deepen to melt in the welding of third electrode 15c
It is deep.Therefore, heat cracking can be made to be difficult to happen.
If interelectrode distance L2 lower than 80mm, second electrode 15b and third electrode 15c halve (セ ミ) from 2 molten baths and
As 1 molten bath, therefore heat cracking occurs.In addition, if interelectrode distance L2 is higher than 160mm, second electrode 15b and third electricity
Pole 15c's is spaced away from, therefore cooling time is elongated, molten bath solidification.Therefore, fusion penetration shoals in the welding of third electrode 15c,
Heat cracking occurs.
In addition, the lower limit of interelectrode distance L2 is preferably 90mm, the upper limit from the viewpoint of making heat cracking be more difficult generation
Preferably 140mm, more preferably 120mm.
(voltage of first electrode)
The voltage of first electrode 15a is 25~40V.If making the voltage of first electrode 15a in this range, root can be made
Fusion penetration width it is abundant, back bead is stablized, and heat cracking can be made to be difficult to happen.
If the voltage of first electrode 15a is lower than 25V, the fusion penetration width of root narrows, therefore heat cracking occurs.Separately
Outside, if the voltage of first electrode 15a is higher than 40V, electric arc is become too strong, therefore back bead is unstable.
From keeping back bead more stable, and it is more difficult heat cracking from the perspective of generation, the voltage of first electrode 15a
Lower limit be preferably 27V, the upper limit is preferably 38V.
(electric current of second electrode)
The electric current of second electrode 15b is 800~1400A.It, will not be right if making the electric current of second electrode 15b in this range
First electrode 15a is formed by back bead and causes adverse effect, therefore back bead can be made to stablize.In addition, if making second
The electric current of electrode 15b can then deepen fusion penetration in this range in the welding of second electrode 15b.Therefore, heat cracking can be made
It is difficult to happen.
If the electric current of second electrode 15b is lower than 800A, fusion penetration shoals in the welding of second electrode 15b, heat cracking
Occur.In addition, if the electric current of second electrode 15b can be to first electrode in the welding of second electrode 15b higher than 1400A
The welding of 15a is formed by back bead and causes adverse effect, and back bead is unstable.
In addition, from keeping back bead more stable, and it is more difficult heat cracking from the perspective of generation, second electrode 15b
The lower limit of electric current be preferably 850A, more preferably 900A.From the same viewpoint, the upper limit of the electric current of second electrode 15b
Preferably 1350A, more preferably 1300A.
In addition, the plate thickness of steel plate 20, for example, can be 10~40mm.If it is welding method of the invention, even
The slab of 25mm or more can also inhibit heat cracking well, and keep the shape of back bead good.
As welding method, for example, can enumerate using bevel shape is the steel plate 20 of single V groove with root face for object, carry out using viscous
Tie the welding of solder flux.Back bead is more stable as a result,.
But it is not limited to this, it can also be using the steel plate of V-butt as object.Alternatively, it is also possible to being using melting
The welding of solder flux.
Welding method of the invention from the description above, because making the polarity of first electrode, first electrode and the second electricity
The interelectrode distance of pole, the interelectrode distance of second electrode and third electrode, the voltage of first electrode, second electrode electric current be
Specific condition can make the shape of back bead good so heat cracking is difficult to happen.
(other embodiments)
In addition, welding method of the invention, in order to make heat cracking be more difficult to occur, and makes the shape of back bead more
Well, preferably in addition to the condition, also make first electrode 15a, second electrode 15b, each welding wire of third electrode 15c straight together
Each polarity of diameter, the electric current of first electrode 15a, the voltage of second electrode 15b, second electrode 15b and third electrode 15c are for example following
In this way.
(gage of wire of first electrode)
The gage of wire of first electrode 15a, for example, it is preferable to be 4.0~6.4mm of φ.If so, it can be achieved that stable is molten
Deep, back bead is more stable.In addition, according to such welding method, the fusion penetration width of root can be substantially ensured, therefore even if
When welding slab, also heat cracking can be made to be more difficult to occur.
In addition, from the viewpoint of more stableization for realizing back bead and preventing the generation of heat cracking, first electrode
The gage of wire of 15a, such as preferably φ 4.8mm or more.
(gage of wire of second electrode, the gage of wire of third electrode)
The gage of wire of second electrode 15b, such as preferably 4.0~6.4mm of φ, the gage of wire of third electrode 15c, example
It is such as preferably 4.0~6.4mm of φ.If so, then stable fusion penetration can be achieved, back bead is more stable.If in addition, such as
This, then can substantially ensure the fusion penetration width of root, therefore even if also heat cracking can be made to be more difficult to send out when welding slab
It is raw.
In addition, from the viewpoint of more stableization for realizing back bead and preventing the generation of heat cracking, second electrode
The gage of wire of 15b and the gage of wire of third electrode 15c, such as both preferably 4.8mm φ or more.
(electric current of first electrode)
The electric current of first electrode 15a, such as preferably 1000~1600A.If so, first electrode 15a electric current will not
Excessively high, current value is in range appropriate, therefore back bead is more stable.In addition, according to such welding method, it can be abundant
Ensure the fusion penetration width of root, therefore even if also heat cracking can be made to be more difficult to occur when welding slab.
In addition, from the viewpoint of more stableization for realizing back bead and preventing the generation of heat cracking, first electrode
The lower limit of the electric current of 15a, such as preferably 1100A, more preferably 1150A.From the viewpoint of in addition, same, first electrode
The upper limit of the electric current of 15a, such as preferably 1550A, more preferably 1400A.
The range of the current value of the first electrode 15a is only to illustrate preferred numberical range, and be not limited to this.The
The current value of one electrode 15a, for example, also can be 950A or 1650A.Nonetheless, back bead is also sufficiently stable, still is able to
Make the very difficult generation of heat cracking.
(voltage of second electrode)
The voltage of second electrode 15b, for example, it is preferable to be 40~50V.If so, second electrode 15b voltage will not mistake
Height, voltage value is in range appropriate, therefore back bead is more stable.In addition, can substantially ensure the fusion penetration width of root, because
Even if also heat cracking can be made to be more difficult to occur when this welding slab.
In addition, from the viewpoint of realizing more stableization for making back bead and preventing the generation of heat cracking, the second electricity
The lower limit of the voltage of pole 15b, for example, it is preferable to be 42V, more preferably 44V.In addition, from the same viewpoint, second electrode
The upper limit of the voltage of 15b, for example, it is preferable to be 48V, more preferably 46V.
The range of the voltage value of the second electrode 15b is only to illustrate preferred numberical range, and it's not limited to that.The
The voltage value of two electrode 15b, for example, also can be 38V or 53V.Nonetheless, back bead is still sufficiently stable, can also make
Heat cracking is very difficult to occur.
(polarity of second electrode, the polarity of third electrode)
The polarity of second electrode 15b and the polarity of third electrode 15c can be AC, DCEN or DCEP etc., but wherein preferred
AC.If making the polarity of second electrode 15b and the polarity AC of third electrode 15c, the chemical component of welding wire can be made largely to protect
It stays in welding metal, therefore the yield of the chemical component of welding metal is more stable, the well-behaved of machinery can be made.
In addition, not above-mentioned condition, is suitable for that setting is i.e. implementable with usual terms.As common condition, for example, closing
In the voltage value of first electrode 15a, it can be enumerated as 25~40V, about the current value of second electrode 15b, it can be enumerated as 700~
1400A。
In addition, for example, current value about third electrode 15c, can be enumerated as 700~1300A, about voltage value, can arrange
Lift 43~46V.
In addition, for example, gage of wire about the 4th electrode 15d, can be enumerated as 4.0~6.8mm φ, about current value,
It can be enumerated as 700~1500A, 40~50V can be enumerated as about voltage value.
The interelectrode distance of third electrode 15c and the 4th electrode 15d can arbitrarily be set.
Gage of wire, voltage value, current value, polarity etc. about the 4th electrode 15d are not particularly limited and preferred model
It encloses, can be carried out with common condition.The condition common as this, for example, can be gage of wire: φ 6.4mm, voltage value:
46V, current value: 1300A, polarity: AC, DCEN or DCEP etc..
In addition, 42~90cm/min can be enumerated as about speed of welding.In addition, these conditions are of course not said and are limited by it
It is fixed.
(outline of welding)
Next, referring to Fig.1~5, the multi-electrode for applying welding method of the invention (is three in example below
Electrode) outline of single-surface single-layer submerged-arc welding is illustrated.
(preparatory process)
In preparatory process, firstly, preparing to be equipped with run-on tab 21 and run-on tab 22, it can carry out in interrupted or continuous face
The steel plate 20 and steel plate 20 of tack welding.Secondly, the upper surface of the liner copper sheet 55 in cushion device 50a, passes through weldering (not shown)
Agent feed mechanism supply liner solder flux 52.Alternatively, the upper surface of the heat-resisting cover 57 in the fire-resistant tarpaulin 56 of cushion device 50b,
Backing solder flux 58 is supplied by solder flux feed mechanism (not shown), then supply liner solder flux 52 on it.
Then, steel plate 20 and steel plate 20 are placed on welder 100, make to be formed by by steel plate 20 and steel plate 20
Welding groove portion M is configured in the top of cushion device 50a or cushion device 50b.Then, driving device (not shown) is operated,
It is micro-adjusted in a manner of making to pad copper sheet 55 or fire-resistant tarpaulin 56 and being located at the underface of welding groove portion M.
Then, compressed air is imported to air hose 59, expands air hose 59 and copper sheet 55 or backing weldering will be padded
Agent 58 presses the back side in welding groove portion M, and liner solder flux 52 is pressed at the back side of welding groove portion M.
(electrode adjustment process)
In electrode adjustment process, make the polarity of first electrode and 3 each interelectrode distance L1, L2 become the condition and
It is adjusted.In addition, the sequence of preparatory process and electrode adjustment process does not have special provision, which process is ok preceding,
It can carry out simultaneously.
(welding sequence)
In welding sequence, firstly, the welding machine 12 of welder 100 is made to be moved to the position that welding starts.Secondly, making
The voltage value of one electrode 15a and the current value of second electrode 15b become the condition and are supplied respectively to voltage and current, make welding machine
12 operatings.Then, from the beginning of steel plate 20 31 towards terminal 32, move welding machine 12 with fixing speed along welding machine crossbeam 13 on one side
It moves, one side supply schedule solder flux 51, welding steel 20 and steel plate 20.
[embodiment]
Hereinafter, for the embodiment for being included in the scope of the present invention, with regard to its effect and the comparative example departed from the scope of the present invention
It is compared and is illustrated.
For forming bevelled 2 steel plates in end face, makes the mutually opposed docking in end face and form Y-shaped groove.The Y word
Shape groove, bevel angle are 45 °, 50 °, 60 °, and root face is 3~6mm, root gap 0mm.In addition, in the present embodiment, steel
The length of plate be 1.2m, steel plate with a thickness of 12~40mm.In addition, plate thickness 12mm is 60 °, 32mm's about bevel angle
It is 45 °, 40mm is 45 °.The composition of the composition of the steel plate, the composition of the welding wire used and solder flux is shown in following table 1.
[table 1]
Surplus: Fe and inevitable impurity
Surplus: Fe and inevitable impurity
Other are B2O3And CaCO3Deng
For the steel plate, with table 2, table 3 No.1~69 shown in condition carry out the single-surface single-layers of 3 electrodes or 4 electrodes
Submerged-arc welding conducts the following evaluation.
Welder is used with cushion device 50a shown in Fig. 3 or cushion device 50b shown in Fig. 4, as
Table solder flux uses sintered flux.In addition, the condition other than condition shown in table 2 and table 3 is conventionally known condition, entirely phase
Same condition.In addition, the logarithm for being unsatisfactory for the scope of the present invention underlines expression.In table 2 and table 3, blank column expression does not have
There is the 4th electrode of setting.
(weld bead shape)
Weld bead shape evaluates back bead with visual observation.In back bead, reinforcement is 2~4mm, also, reinforcement and weldering
Road width general uniform is extremely good (◎), and reinforcement is 2~4mm, also, reinforcement and weld width are slightly owed uniformly to be good
Good (zero).In addition, in back bead, remaining to contain very few or superfluous, undercut is multiple, weld width is non-uniform or welding bead outside
It sees undesirable for poor (×).
(high-temperature cracking resistance)
As shown in fig. 6, the welding metal formed by welding method of the invention, is formed by welding metal by first electrode
60, second electrode is formed by welding metal 61, only by third electrode or the welding gold formed by third electrode and the 4th electrode
Belong to 62 to constitute.
Its dendrite of the tissue of welding metal 60 of first electrode generation is just laterally grown up, and heat cracking is easy to happen.Therefore,
The welding metal that second electrode occurs is deep fusion penetration, the tissue of the fragility is melted, so that high-temperature cracking resistance becomes good.
Therefore, by section macrostructure, measurement evaluation second electrode and third electrode (or the second~the 4th electrode) institute's shape
At welding metal 61 and welding metal 62 fusion penetration depth T.If the plate thickness of steel plate 20 is t, surface (the upper table away from steel plate 20
Face), the molten of welding metal 61 and welding metal 62 is formed by with second electrode and third electrode (or the second~the 4th electrode)
When depth T is in the relationship of " 14/16t≤T < 16/16t ", high-temperature cracking resistance is very good (◎), in " 12/16t≤
When the relationship of T < 14/16t ", high-temperature cracking resistance is good (zero), for not when the relationship of " T < 12/16t " or " T >=16/16t "
Good (×).
(impact property)
It is carried out by the pendulum impact test according to JIS Z 2242:2005.In addition, in pendulum impact test, test temperature
For 70J or more, impact property is very good (◎) for (vE-20 DEG C) of shock absorption energy at -20 DEG C of degree, 50J or more and low
In 70J, impact property is good (zero), poor (×) lower than the impact property of 50J.
[table 2]
[table 3]
As shown in table 2, the sample of No.1~42, because meeting the scope of the present invention, whole assessment items is good.Especially
It is the sample of No.1,8~12,15,22,24,25,27,35~37, whole assessment items is all extremely good.
In contrast, as shown in table 3, the sample of No.43~69 because being unsatisfactory for the scope of the present invention, become with
Under result.
The sample of No.43,52,61, because the polarity of first electrode is exchange, the shape defect of back bead.
The sample of No.44,53,62, because the polarity of first electrode is direct current electrode positive, the shape of back bead
It is bad.In addition, its impact property is also poor.
The sample of No.45,54,63, because the interelectrode distance of first electrode and second electrode is lower than lower limit value, back
The shape defect of face welding bead.
The sample of No.46,55,64, it is resistance to because the interelectrode distance of first electrode and second electrode is higher than upper limit value
Heat cracking is bad.
The sample of No.47,56,65, it is resistance to because the interelectrode distance of second electrode and third electrode is lower than lower limit value
Heat cracking is bad.
The sample of No.48,57,66, it is resistance to because the interelectrode distance of second electrode and third electrode is higher than upper limit value
Heat cracking is bad.
The sample of No.49,58,67, because the voltage value of first electrode is lower than lower limit value, high-temperature cracking resistance is not
It is good.
The sample of No.50,59,68, because the voltage value of first electrode is higher than upper limit value, the shape of back bead is not
It is good.
The sample of No.51, because the current value of second electrode is lower than lower limit value, high-temperature cracking resistance is bad.
No.60,69 sample because the current value of second electrode be higher than upper limit value, the shape defect of back bead.
[explanation of symbol]
11 pier base frames
12 welding machines
13 welding machine crossbeams
15 electrodes
15a first electrode
15b second electrode
15c third electrode
The 4th electrode of 15d
16a~16d welding wire
17a~17d welding torch
20 steel plates
21,22 run-on tabs
31 beginnings
32 terminals
50a, 50b cushion device
51 table solder flux
52 liner solder flux
53 slags
54 welding metals
55 liner copper sheets
56 fire-resistant tarpaulins
57 heat-resisting covers
58 backing solder flux
59 air hoses
60 welding metals formed by first electrode
61 welding metals formed by second electrode
62 by third electrode, or the welding metal formed by third electrode and the 4th electrode
100 welders
A1~A4 welding wire protrudes length
L1, L2 interelectrode distance
The welding metal 61 and welding that T is formed by second electrode and third electrode (or the second~the 4th electrode)
The fusion penetration depth of metal 62
T plate thickness
Claims (2)
1. a kind of multi-electrode single-surface single-layer submerged arc soldering method is the multi-electrode list for carrying out the welding of single-surface single-layer using multiple electrodes
Face single layer submerged arc soldering method, which is characterized in that welded with following condition:
Using the steel plate of 10~40mm of plate thickness as object,
The polarity of first electrode: electrode flanks negative under direct current；
The interelectrode distance of first electrode and second electrode: 80mm or more and 160mm or less；
The interelectrode distance of second electrode and third electrode: 80mm or more and 160mm or less；
The voltage of first electrode: the voltage of 25~40V, second electrode: the voltage of 40~53V, third electrode: 43~46V；
The electric current of first electrode: the electric current of 1000~1650A, second electrode: the electric current of 800~1400A, third electrode: 700~
1300A；
The gage of wire of first electrode is 4.0~6.4mm of φ, the gage of wire of second electrode is 4.0~6.4mm of φ, third electricity
The gage of wire of pole is 4.0~6.4mm of φ.
2. multi-electrode single-surface single-layer submerged arc soldering method according to claim 1, which is characterized in that the pole of the second electrode
Property is alternating current, and the polarity of the third electrode is alternating current.
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| JP2015073651A JP6383319B2 (en) | 2015-03-31 | 2015-03-31 | Multi-electrode single-sided single layer submerged arc welding method |
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| JP7307025B2 (en) * | 2020-03-31 | 2023-07-11 | 株式会社神戸製鋼所 | Multi-electrode gas-shielded arc single-sided welding method and multi-electrode gas-shielded arc single-sided welding apparatus |
| JP2023023454A (en) | 2021-08-05 | 2023-02-16 | 株式会社神戸製鋼所 | Multielectrode one-side surface submerged-arc welding method |
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|---|---|---|---|---|
| US5214265A (en) * | 1990-11-15 | 1993-05-25 | Pollack Alex J | High speed low deposition submerged arc welding apparatus and method |
| CN102325625A (en) * | 2009-02-24 | 2012-01-18 | 依赛彼公司 | Arc welding method and apparatus for arc welding |
| CN103945973A (en) * | 2011-11-15 | 2014-07-23 | 新日铁住金株式会社 | Method for high-efficiency welding of thick steel plate |
| CN103958109A (en) * | 2011-11-29 | 2014-07-30 | 杰富意钢铁株式会社 | Submerged arc welding method for steel sheets |
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| US5140140A (en) * | 1990-11-15 | 1992-08-18 | Pollack Alex J | Method and apparatus of submerged arc welding with electrodes in tandem |
| JP3186885B2 (en) * | 1993-03-04 | 2001-07-11 | 株式会社神戸製鋼所 | Single-sided submerged arc welding method |
| JP3367566B2 (en) * | 1993-05-20 | 2003-01-14 | 川崎製鉄株式会社 | Large heat input single-sided submerged arc welding method |
| JPH08257752A (en) * | 1995-03-20 | 1996-10-08 | Kawasaki Steel Corp | Three electrode two layer submerged arc welding of thick plate |
| JPH09206946A (en) * | 1996-02-05 | 1997-08-12 | Nippon Steel Weld Prod & Eng Co Ltd | Three electrode submerged arc welding method |
| JP2005349407A (en) * | 2004-06-08 | 2005-12-22 | Kobe Steel Ltd | One-side submerged arc welding method |
| JP2010221296A (en) * | 2009-02-27 | 2010-10-07 | Jfe Steel Corp | Submerged arc welding method |
| KR101117337B1 (en) * | 2009-10-28 | 2012-03-07 | 대우조선해양 주식회사 | Apparatus for multiple electrode weaving submerged arc welding and welding method using the same |
| JP2013111622A (en) * | 2011-11-30 | 2013-06-10 | Jfe Steel Corp | Multi-electrode submerged arc welding method |
| JP6094352B2 (en) * | 2012-04-17 | 2017-03-15 | Ｊｆｅスチール株式会社 | Multi-electrode submerged arc welding method for steel sheet |
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| US5214265A (en) * | 1990-11-15 | 1993-05-25 | Pollack Alex J | High speed low deposition submerged arc welding apparatus and method |
| CN102325625A (en) * | 2009-02-24 | 2012-01-18 | 依赛彼公司 | Arc welding method and apparatus for arc welding |
| CN103945973A (en) * | 2011-11-15 | 2014-07-23 | 新日铁住金株式会社 | Method for high-efficiency welding of thick steel plate |
| CN103958109A (en) * | 2011-11-29 | 2014-07-30 | 杰富意钢铁株式会社 | Submerged arc welding method for steel sheets |
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| JP6383319B2 (en) | 2018-08-29 |
| JP2016193444A (en) | 2016-11-17 |
| CN106001867A (en) | 2016-10-12 |
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