CN109047997A - The welding method of tandem electrogas welding suitable for super large weld heat input - Google Patents
The welding method of tandem electrogas welding suitable for super large weld heat input Download PDFInfo
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- CN109047997A CN109047997A CN201810906403.0A CN201810906403A CN109047997A CN 109047997 A CN109047997 A CN 109047997A CN 201810906403 A CN201810906403 A CN 201810906403A CN 109047997 A CN109047997 A CN 109047997A
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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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- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
- B23K9/022—Welding by making use of electrode vibrations
-
- 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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- Mechanical Engineering (AREA)
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- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A kind of welding method of the tandem electrogas welding suitable for super large weld heat input.Its technical solution is: high strength ultra-thick steel plates to be welded being processed as double V-groove, bevel angle is 30~50 °, and root gap is 6~8mm, installs copper triangle water cooling test block additional and carries out pressure cooling；Using the welding method of tandem electrogas welding, the swinging distance of the mariages is respectively: preceding silk is 4.5~7.8mm with face of weld distance a, and rear silk is 6.3~11.6mm with root of weld distance b；Preceding silk distance d between rear silk is 20~45mm.The high strength ultra-thick steel plates to be welded: with a thickness of 80~100mm, yield strength 355MPa, tensile strength is 530~580MPa, and -20 DEG C of notched bar impact strengths are >=34J.The present invention has the characteristics that high welding efficiency, simple process and strong operability；The welding point formed with this method comprehensive mechanical property is good and the impact flexibility of weld metal is excellent.
Description
Technical field
The invention belongs to the welding technology fields of the tandem electrogas welding of steel material.It is suitable for super large more particularly to one kind
The welding method of the tandem electrogas welding of weld heat input.
Background technique
In recent years, the direction of world's manufacturing industry forward direction Efficient intelligent is grown rapidly, and enlargement, heavy load have become mainly
Manufacture structural member feature.Many large-scale components are constituted with slab and ultra-thick plate, and the application of slab and ultra-thick plate welds skill to it
More stringent requirements are proposed for the high efficiency of art.Currently, in the efficient welding technique such as multiplewire submerged arc welding, electroslag welding, electro-gas (enclosed) welding
In, the welding efficiency of electro-gas (enclosed) welding is higher than other welding techniques, becomes the one preferred technique of efficient welding, is also those skilled in the art
Member is of interest.
The patent of invention of " the electro-gas (enclosed) welding technique suitable for 20~45mm slab " (103934541A), discloses a kind of line energy
Amount is 100kJ/cm, the electro-gas (enclosed) welding technology that is 20~50mm suitable for plate thickness.A kind of " gas for being suitable for 50~80mm thick steel plate
Electric vertical position welding method " (104475920A) patented technology, it discloses a kind of heat input and is 120~150kJ/cm, is suitable for plate thickness
The electro-gas welding method art of 50~80mm.This two kinds of patented technologies are only applicable to monofilament electro-gas (enclosed) welding, and maximum heat input is limited to
150kJ/cm, maximum plate thickness are limited to 80mm.When use weld heat input is higher than 150kJ/cm or more, with a thickness of 80mm or more
When ultra-thick plate, existing High Efficiency Welding Process is formed by weld metal, and coarse column crystal proportion is larger, weld metal
Impact flexibility is lowly its biggest problem.That is: the prior art has biggish office for further increasing the requirement of welding efficiency
It is sex-limited.
Summary of the invention
The present invention is directed to overcome the deficiencies in the prior art, it is therefore an objective to provide the high-efficient, simple process of one kind and operability
The welding method of the strong tandem electrogas welding suitable for super large weld heat input, is formed by the comprehensive of welding point with this method
Conjunction mechanical property is good, and the impact flexibility of especially weld metal is excellent.
To achieve the above object, the technical solution adopted by the present invention is that: high strength ultra-thick steel plates to be welded are processed as V
Type groove, bevel angle are 30~50 °, and root gap is 6~8mm, installs copper triangle water cooling test block additional and carries out pressure cooling；
Using the welding method of tandem electrogas welding, the swinging distance of the mariages is respectively: preceding silk is with face of weld distance a
4.5~7.8mm, rear silk are 6.3~11.6mm with root of weld distance b；Preceding silk distance d between rear silk is 20~45mm.
The high strength ultra-thick steel plates to be welded: with a thickness of 80~100mm；Yield strength is 355MPa；Tensile strength
For 530~580MPa；- 20 DEG C of notched bar impact strengths are >=34J.
The technical parameter of the welding is: welding current is 370~380A；Arc voltage is 40~41V；Speed of welding is
0.58~0.98mm/s；Protective gas is 100%CO2；Gas flow is 50~52L/min；Weld heat input be 300~
520kJ/cm。
By adopting the above-described technical solution, compared with prior art, the present invention having following good effect:
The present invention is using double wire oscillation modes, and the preceding silk of strict control is at a distance from face of weld, rear silk and the root of weld
Distance, it is cooling by the pressure of welding plate surface and the copper shoe of the root of weld, make the column crystal proportion in weld metal
It effectively reduces, to reduce the adverse effect of On Impact Toughness caused by coarse column crystal, 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 80~100mm
It is >=the welding of the high-strength ultra-thick steel plates of 34J with -20 DEG C of notched bar impact strengths, welding can be completed together, welding efficiency is high, is
50~100 times of common welding method.
Welding point is formed by the present invention and carries out Mechanics Performance Testing, the tensile strength of welding point is 540~
680MPa, being formed by welding point has and the comparable tensile strength of base material；Impact flexibility of the weld metal at -20 DEG C DEG C
Average value is 60~82J, 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 super large weld heat input.By high-intensitive super thick to be welded
Steel plate is processed as double V-groove as shown in Figure 1, and bevel angle is 30 °, root gap 6mm, installs copper triangle water cooling examination additional
Block carries out pressure cooling；Using the welding method of tandem electrogas welding, the swinging distance of the mariages is respectively: preceding silk and weld seam
The distance a on surface is 4.5mm, and rear silk is 6.3mm with root of weld distance b；Preceding silk distance d between rear silk is 20mm.
The high strength ultra-thick steel plates to be welded are D36: with a thickness of 80mm；Yield strength is 355MPa；Tensile strength
For 530MPa；- 20 DEG C of notched bar impact strengths are >=34J.
The technical parameter of the welding is: welding current 370A, arc voltage 40V, speed of welding 0.98mm/s,
Protective gas is 100%CO2, gas flow 50L/min, weld heat input 300kJ/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 DEG C of impact flexibility average values of weld metal are 82J.Test result shows: its welding point and weld seam gold
Attribute can fully meet D36, require with a thickness of the service performance of the large-scale component of 80mm.
Embodiment 2
A kind of welding method of the tandem electrogas welding suitable for super large weld heat input.By high-intensitive super thick to be welded
Steel plate is processed as double V-groove as shown in Figure 1, and bevel angle is 40 °, root gap 7mm, installs copper triangle water cooling examination additional
Block carries out pressure cooling；Using the welding method of tandem electrogas welding, the swinging distance of the mariages is respectively: preceding silk and weld seam
The distance a on surface is 6.0mm, and rear silk is 9.2mm with root of weld distance b；Preceding silk distance d between rear silk is 32mm.
The high strength ultra-thick steel plates to be welded are D36: with a thickness of 90mm；Yield strength is 355MPa；Tensile strength
For 550MPa；- 20 DEG C of notched bar impact strengths are >=34J.
The technical parameter of the welding is: welding current 370A, arc voltage 41V, speed of welding 0.72mm/s,
Protective gas is 100%CO2, gas flow 51L/min, weld heat input 430kJ/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 DEG C of impact flexibility average values of weld metal are 71J.Test result shows: its welding point and weld seam gold
Attribute can fully meet D36, require with a thickness of the service performance of the large-scale component of 90mm.
Embodiment 3
A kind of welding method of the tandem electrogas welding suitable for super large weld heat input.By high-intensitive super thick to be welded
Steel plate is processed as double V-groove as shown in Figure 1, and bevel angle is 50 °, root gap 8mm, installs copper triangle water cooling examination additional
Block carries out pressure cooling；Using the welding method of tandem electrogas welding, the swinging distance of the mariages is respectively: preceding silk and weld seam
The distance a on surface is 7.8mm, and rear silk is 11.6mm with root of weld distance b；Preceding silk distance d between rear silk is 45mm.
The high strength ultra-thick steel plates to be welded are D36: with a thickness of 100mm；Yield strength is 355MPa；Tensile strength
For 580MPa；- 20 DEG C of notched bar impact strengths are >=34J.
The technical parameter of the welding is: welding current 380A, arc voltage 41V, speed of welding 0.58mm/s,
Protective gas is 100%CO2, gas flow 52L/min, weld heat input 520kJ/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 580MPa, -20 DEG C of DEG C of impact flexibility average values of weld metal are 60J.Test result shows its welding point and weld seam gold
Attribute can fully meet D36, require with a thickness of the service performance of the large-scale component of 100mm.
Present embodiment compared with prior art, has following good effect:
Present embodiment using double wire oscillation modes, the preceding silk of strict control at a distance from face of weld, rear silk and
The distance of the root of weld, it is cooling by the pressure of welding plate surface and the copper shoe of the root of weld, make the column crystal in weld metal
Proportion effectively reduces, to reduce the adverse effect of On Impact Toughness caused by coarse column crystal, improves weld metal
The comprehensive mechanical property of impact flexibility, welding point is good.
Present embodiment be suitable for yield strength be 355MPa, tensile strength is 530~580MPa, with a thickness of 80~
100mm and -20 DEG C of notched bar impact strengths are >=welding of the high-strength ultra-thick steel plates of 34J, welding, welding efficiency pole can be completed together
Height is 50~100 times of common welding method.
Welding point is formed by present embodiment and carries out Mechanics Performance Testing, the tensile strength of welding point is
540~680MPa, 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 60~82J, 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 super large weld heat input, which is characterized in that will be to be welded
High strength ultra-thick steel plates are processed as double V-groove, and bevel angle is 30~50 °, and root gap is 6~8mm, installs copper triangle additional
Water cooling test block carries out pressure cooling；Using the welding method of tandem electrogas welding, the swinging distance of the mariages is respectively: preceding silk
It is 4.5~7.8mm with face of weld distance a, rear silk is 6.3~11.6mm with root of weld distance b；Between preceding silk and rear silk
Distance d be 20~45mm；
The high strength ultra-thick steel plates to be welded: with a thickness of 80~100mm, yield strength 355MPa, tensile strength 530
~580MPa, -20 DEG C of notched bar impact strengths are >=34J.
2. the welding method suitable for the tandem electrogas welding of super large weld heat input, feature exist according to claim 1
Be in the technical parameter of the welding: welding current be 370~380A, arc voltage be 40~41V, speed of welding be 0.58~
0.98mm/s, protective gas 100%CO2, gas flow are 50~52L/min, and weld heat input is 300~520kJ/cm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369829A (en) * | 2019-08-06 | 2019-10-25 | 深圳市瑞凌实业股份有限公司 | A kind of electro-gas (enclosed) welding device and welding method |
| CN112589233A (en) * | 2020-12-02 | 2021-04-02 | 上海江南长兴造船有限责任公司 | One-step forming welding method for hull structure panel |
| CN115338516A (en) * | 2022-08-31 | 2022-11-15 | 南京钢铁股份有限公司 | Welding method suitable for double-wire electrogas welding of high-strength super-thick steel plate |
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| CN104985284A (en) * | 2015-06-30 | 2015-10-21 | 苏州华日金菱机械有限公司 | Double-wire electrogas welding machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369829A (en) * | 2019-08-06 | 2019-10-25 | 深圳市瑞凌实业股份有限公司 | A kind of electro-gas (enclosed) welding device and welding method |
| CN110369829B (en) * | 2019-08-06 | 2021-08-31 | 深圳市瑞凌实业集团股份有限公司 | Electro-gas welding device and welding method |
| CN112589233A (en) * | 2020-12-02 | 2021-04-02 | 上海江南长兴造船有限责任公司 | One-step forming welding method for hull structure panel |
| CN115338516A (en) * | 2022-08-31 | 2022-11-15 | 南京钢铁股份有限公司 | Welding method suitable for double-wire electrogas welding of high-strength super-thick steel plate |
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Application publication date: 20181221 |