CN108856970A - The welding method of tandem electrogas welding suitable for high strength ultra-thick steel plates - Google Patents
The welding method of tandem electrogas welding suitable for high strength ultra-thick steel plates Download PDFInfo
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- CN108856970A CN108856970A CN201810974731.4A CN201810974731A CN108856970A CN 108856970 A CN108856970 A CN 108856970A CN 201810974731 A CN201810974731 A CN 201810974731A CN 108856970 A CN108856970 A CN 108856970A
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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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
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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
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Abstract
A kind of welding method of the tandem electrogas welding suitable for high strength ultra-thick steel plates.Its technical solution is：High strength ultra-thick steel plates to be welded are processed as Asymmetric two-sided double V-groove, upper bevel angle is 25~30 °, and upper groove thickness δ 1 is 80~90mm, and lower groove thickness δ 2 is 40~70mm, and root gap is 5~5.95mm.Double groove is respectively adopted the welding method of tandem electrogas welding, the swinging distance of the mariages is respectively：Preceding silk and weld seam upper surface or be 3.5~4.4mm at a distance from weld seam lower surface, rear silk is 5.3~6.2mm at a distance from the root of weld, and distance is 20~25mm between preceding silk and rear silk.The high strength ultra-thick steel plates to be welded：Thickness δ is 120~160mm, and yield strength 355MPa, tensile strength is 530~580MPa, and -20 DEG C of notched bar impact strengths are >=34J.Welding efficiency height of the present invention and simple process；Be formed by welding point comprehensive mechanical property is good and the impact flexibility of weld metal is excellent.
Description
Technical field
The invention belongs to high strength ultra-thick steel plates welding technology fields.It is suitable for high strength ultra-thick steel plates more particularly to one kind
Tandem electrogas welding welding method.
Background technique
As steel industry continues to develop, in engineering fields such as marine ship, bridges, thickness is more than the super thick steel of 100mm
Plate be widely used in load is big, in the demanding Heavy Type Steel Structure of impact property.In order to meet the design of this kind of steel construction and make
With requiring, it is necessary to the ultra-thick plate welding procedure to match with this.Currently, contour in multiplewire submerged arc welding, electroslag welding, electro-gas (enclosed) welding
In the Large Heat Input Welding technology of effect, the welding efficiency of electro-gas (enclosed) welding is higher than other welding techniques, becomes the first choice of efficient welding
Technology, it is also of interest for those skilled in the art.
《Electro-gas (enclosed) welding technique suitable for 20~45mm slab》The patent of invention of (103934541A) discloses a kind of be applicable in
In the electro-gas (enclosed) welding technology that plate thickness is 20~50mm.《A kind of electro-gas welding method being suitable for 50~80mm thick steel plate》
(104475920A) patented technology discloses a kind of electro-gas (enclosed) welding technology for being 50~80mm suitable for plate thickness.This two kinds of patents
Technology is only applicable to monofilament electro-gas (enclosed) welding, and maximum plate thickness is limited to 80mm.If in the ultra-thick steel plates that thickness is more than 100mm or more
Existing welding procedure is used in welding, it is larger to be formed by column crystal proportion coarse in weld metal, will cause whole
The impact toughness decreased of a welding point, particularly weld metal.I.e.：It is efficient that existing welding procedure is unable to satisfy ultra-thick steel plates
The requirement of welding.
Summary of the invention
The present invention is directed to overcome the deficiencies in the prior art, it is therefore an objective to provide high-efficient one kind, strong operability, be suitable for height
The welding method for the tandem electrogas welding that intensity and steel plate thickness are 120~160mm；The welding method is formed by welding point
Comprehensive mechanical property is good and the impact flexibility of weld metal is excellent.
To achieve the goals above, the technical solution adopted by the present invention is that：High strength ultra-thick steel plates to be welded are processed
For asymmetric two-sided double V-groove, upper bevel angle is 25~30 °, and upper groove thickness δ 1 is 80~90mm, and lower bevel angle is
25~30 °, lower groove thickness δ 2 is 40~70mm, and root gap is 5~5.95mm.Copper triangle water cooling test block is installed additional to carry out
Cooling is forced, double groove is respectively adopted the welding method of tandem electrogas welding.
The swinging distance of the mariages is respectively：In welding when groove before silk and weld seam upper surface distance a1 be 3.5~
4.4mm, rear silk are 5.3~6.2mm with root of weld distance b1, and preceding silk distance d1 between rear silk is 13~19.5mm；Weldering
Silk and weld seam lower surface distance a2 are 3.5~4.4mm before when connecing lower groove, rear silk and root of weld distance b2 be 5.3~
6.2mm, preceding silk distance d2 between rear silk is 13~19.5mm.
The high strength ultra-thick steel plates to be welded：Thickness δ is 120~160mm；Yield strength is 355MPa；Tension is strong
Degree is 530~550MPa；- 20 DEG C of notched bar impact strengths are >=34J.
The technical parameter of the welding is：Welding current is 360~380A, and arc voltage is 36~40V, and speed of welding is
0.72~1.15mm/s, the CO that protective gas is 100%2, gas flow is 47~51L/min, the sealing wire energy of single groove
Amount is 230~430kJ/cm.
By adopting the above-described technical solution, compared with prior art, the present invention there is following good effect：
The present invention uses double wire oscillation modes, and silk is at a distance from weld seam upper surface, under preceding silk and weld seam before strict control
The distance on surface, rear silk are cooling by the pressure of welding plate surface and the copper shoe of the root of weld at a distance from the root of weld, make to weld
Column crystal proportion in seam metal is substantially reduced, to reduce the bad shadow of On Impact Toughness caused by coarse column crystal
It rings, improves the impact flexibility of weld metal, the comprehensive mechanical property of welding point is good.
The present invention be suitable for yield strength be 355MPa, tensile strength is 530~580MPa, with a thickness of 120~160mm
It is >=the welding of the high strength ultra-thick steel plates of 34J with -20 DEG C of notched bar impact strengths, whole process only needs to weld twice can be completed,
Simple process and strong operability, greatly improve welding efficiency.
Welding point is formed by the present invention and carries out Mechanics Performance Testing, the tensile strength of welding point is 530~
550MPa, being formed by welding point has and the comparable tensile strength of base material；Weld metal is flat in -20 DEG C of impact flexibility
Mean value is 57~74J, has good low-temperature impact toughness, meets the service performance requirement of such strength structure part.
Therefore, the present invention has the characteristics that high welding efficiency, simple process and strong operability；It is formed by with this method
The comprehensive mechanical property of welding point is good, and the impact flexibility of especially weld metal is excellent.
Detailed description of the invention
Fig. 1 is the schematic diagram of slope type of the invention, double bonding wire spacing and wire oscillation distance.
Specific embodiment
Present invention will be further described below with reference to the accompanying drawings and specific embodiments, not to the limit of this its protection scope
System.
The welding wire that present embodiment uses is DW-S1LG, diameter 1.6mm.It is repeated no more in embodiment.
Embodiment 1
A kind of welding method of the tandem electrogas welding suitable for high strength ultra-thick steel plates.By high-intensitive super thick to be welded
Steel plate is processed as two-sided asymmetric V groove as shown in Figure 1：Upper groove thickness δ 1 is 80mm, and upper bevel angle is 25 °；Under
Groove thickness δ 2 is 40mm, and lower bevel angle is 25 °；Root gap is 5mm.Copper triangle water cooling test block is installed additional to be forced
It is cooling, double groove is respectively adopted the welding method of tandem electrogas welding.
The swinging distance of the mariages is respectively, in welding when groove：Preceding silk is with weld seam upper surface distance a1
3.5mm, rear silk are 5.3mm with root of weld distance b1, and preceding silk distance d1 between rear silk is 13mm；When welding lower groove：
Preceding silk is 3.5mm with weld seam lower surface distance a2, and rear silk is 5.3mm with root of weld distance b2, between preceding silk and rear silk
It is 13mm away from d2.
The high strength ultra-thick steel plates to be welded are D36：Overall thickness δ is 120mm；Yield strength is 355MPa；Tension
Intensity is 530MPa；- 20 DEG C of notched bar impact strengths are >=34J.
The technical parameter of the welding is, in welding when groove：Welding current is 370A, arc voltage 40V, welding speed
Degree is 0.98mm/s, the CO that protective gas is 100%2, gas flow 50L/min, the weld heat input of upper groove is
302kJ/cm；When welding lower groove：Welding current is 360A, arc voltage 37V, speed of welding 1.15mm/s, protects gas
The CO that body is 100%2, gas flow 47L/min, the weld heat input of lower groove is 230kJ/cm.
Welding point is formed by the present embodiment and carries out Mechanics Performance Testing, it is as a result as follows：Welding point tensile strength
For 530MPa, -20 DEG C of impact flexibility average values of weld metal are 74J.Test result shows：Its welding point and weld metal
Performance fully meets D36, requires with a thickness of the service performance of the large-scale component of 120mm.
Embodiment 2
A kind of welding method of the tandem electrogas welding suitable for high strength ultra-thick steel plates.By high-intensitive super thick to be welded
Steel plate is processed as two-sided asymmetric V groove as shown in Figure 1：Upper groove thickness δ 1 is 80mm, and upper bevel angle is 30 °；Under
Groove thickness δ 2 is 50mm, and lower bevel angle is 25 °, root gap 5.5mm.Copper triangle water cooling test block is installed additional to carry out by force
Freeze but, the two-sided welding method that tandem electrogas welding is respectively adopted of test plate (panel).
The swinging distance of the mariages is respectively, in welding when groove：Preceding silk is with weld seam upper surface distance a1
4.0mm, rear silk are 5.8mm with root of weld distance b1, and preceding silk distance d1 between rear silk is 16mm；When welding lower groove：
Preceding silk is 4.0mm with weld seam lower surface distance a2, and rear silk is 5.8mm with root of weld distance b2, between preceding silk and rear silk
It is 16mm away from d2.
The high strength ultra-thick steel plates to be welded are D36：Overall thickness δ is 130mm；Yield strength is 355MPa；Tension
Intensity is 530MPa；- 20 DEG C of notched bar impact strengths are >=34J.
The technical parameter of the welding is, in welding when groove：Welding current is 370A, arc voltage 40V, welding speed
Degree is 0.98mm/s, the CO that protective gas is 100%2, gas flow 50L/min, the weld heat input of upper groove is
302kJ/cm；When welding lower groove：Welding current is 360A, arc voltage 37V, speed of welding 1.05mm/s, protects gas
The CO that body is 100%2, gas flow 48L/min, the weld heat input of lower groove is 254kJ/cm.
Welding point is formed by the present embodiment and carries out Mechanics Performance Testing, it is as a result as follows：Welding point tensile strength
For 550MPa, -20 DEG C of impact flexibility average values of weld metal are 65J.Test result shows：Its welding point and weld metal
Performance fully meets D36, requires with a thickness of the service performance of the large-scale component of 130mm.
Embodiment 3
A kind of welding method of the tandem electrogas welding suitable for high strength ultra-thick steel plates.By high-intensitive super thick to be welded
Steel plate is processed as two-sided asymmetric V groove as shown in Figure 1：Upper groove thickness δ 1 is 90mm, and upper bevel angle is 30 °；Under
Groove thickness δ 2 is 70mm, and lower bevel angle is 30 °, root gap 5.95mm.Copper triangle water cooling test block is installed additional to carry out
Cooling is forced, double groove is respectively adopted the welding method of tandem electrogas welding.
The swinging distance of the mariages is respectively, in welding when groove：Preceding silk is with weld seam upper surface distance a1
4.4mm, rear silk are 6.2mm with root of weld distance b1, and preceding silk distance d1 between rear silk is 19.5mm；When welding lower groove
Preceding silk is 4.4mm with weld seam lower surface distance a2, and rear silk is 6.2mm with root of weld distance b2, between preceding silk and rear silk
It is 19.5mm away from d2.
The high strength ultra-thick steel plates to be welded are D36：Two-sided overall thickness δ is 160mm；Yield strength is 355MPa；
Tensile strength is 530MPa；- 20 DEG C of notched bar impact strengths are >=34J.
The technical parameter of the welding is：In welding when groove：Welding current is 380A, arc voltage 38V, welding speed
Degree is 0.72mm/s, the CO that protective gas is 100%2, gas flow 51L/min, weld heat input 430kJ/cm；Welding
When lower groove：Welding current is 360A, arc voltage 36V, speed of welding 0.96mm/s, protective gas 100%CO2,
Gas flow is 49L/min, weld heat input 278kJ/cm.
Welding point is formed by the present embodiment and carries out Mechanics Performance Testing, it is as a result as follows：Welding point tensile strength
For 540MPa, -20 DEG C of impact flexibility average values of weld metal are 57J.Test result shows：Its welding point and weld metal
Performance fully meets D36, requires with a thickness of the service performance of the large-scale component of 160mm.
Present embodiment compared with prior art, has following good effect：
Present embodiment uses double wire oscillation modes, and silk is at a distance from weld seam upper surface, preceding silk before strict control
With at a distance from weld seam lower surface, rear silk at a distance from the root of weld, pass through the pressure of welding plate surface and the copper shoe of the root of weld
It is cooling, it is substantially reduced the column crystal proportion in weld metal, to reduce On Impact Toughness caused by coarse column crystal
Adverse effect, improve the impact flexibility of weld metal, the comprehensive mechanical property of welding point is good.
Present embodiment be suitable for yield strength be 355MPa, tensile strength is 530~580MPa, with a thickness of 120
~160mm and -20 DEG C of notched bar impact strengths are >=welding of the high strength ultra-thick steel plates of 34J, whole process only needs twice welding i.e.
Achievable, simple process and strong operability greatly improve welding efficiency.
Welding point is formed by present embodiment and carries out Mechanics Performance Testing, the tensile strength of welding point is
530~550MPa, being formed by welding point has and the comparable tensile strength of base material；Impact of the weld metal at -20 DEG C DEG C
Toughness average value is 57~74J, has good low-temperature impact toughness, meets the service performance requirement of such strength structure part.
Therefore, present embodiment has the characteristics that high welding efficiency, simple process and strong operability；Use this method
The comprehensive mechanical property for being formed by welding point is good, and the impact flexibility of especially weld metal is excellent.
Claims (2)
1. a kind of welding method of the tandem electrogas welding suitable for high strength ultra-thick steel plates, which is characterized in that will be to be welded
High strength ultra-thick steel plates are processed as asymmetric two-sided double V-groove, and upper bevel angle is 25~30 °, and upper groove thickness δ 1 is 80
~90mm, lower bevel angle are 25~30 °, and lower groove thickness δ 2 is 40~70mm, and root gap is 5~5.95mm；Install copper additional
Matter triangle water cooling test block carries out pressure cooling, double groove is respectively adopted the welding method of tandem electrogas welding；
The swinging distance of the mariages is respectively, in welding when groove：Preceding silk and weld seam upper surface distance a1 be 3.5~
4.4mm, rear silk are 5.3~6.2mm with root of weld distance b1, and preceding silk distance d1 between rear silk is 13~19.5mm；Weldering
When connecing lower groove：Preceding silk and weld seam lower surface distance a2 are 3.5~4.4mm, rear silk and root of weld distance b2 be 5.3~
6.2mm, preceding silk distance d2 between rear silk is 13~19.5mm；
The high strength ultra-thick steel plates to be welded：Thickness δ is 120~160mm, yield strength 355MPa, and tensile strength is
530~550MPa, -20 DEG C of notched bar impact strengths are >=34J.
2. the welding method of the tandem electrogas welding according to claim 1 suitable for high strength ultra-thick steel plates, feature
Being the technical parameter of the welding is：Welding current is 360~380A, and arc voltage is 36~40V, speed of welding 0.72
~1.15mm/s, the CO that protective gas is 100%2, gas flow is 47~51L/min, and the weld heat input of single groove is
230~430kJ/cm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111185728A (en) * | 2020-01-21 | 2020-05-22 | 鞍钢股份有限公司 | Low-cost and efficient composite blank assembly process method |
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Application publication date: 20181123 |