CN110142512A - A kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet - Google Patents
A kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet Download PDFInfo
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- CN110142512A CN110142512A CN201910587607.7A CN201910587607A CN110142512A CN 110142512 A CN110142512 A CN 110142512A CN 201910587607 A CN201910587607 A CN 201910587607A CN 110142512 A CN110142512 A CN 110142512A
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- welding
- laser
- electric arc
- mig
- steel sheet
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of laser-MIG electric arc complex welding methods of low-alloy high-strength steel sheet; square groove single-run welding through welding steel plate may be implemented; by using optical fiber laser and MIG welding machine; using argon gas as laser welding protective gas; realize laser-MIG electric arc composite welding; by setting certain laser power, optical fiber spacing, defocusing amount, speed of welding, welding current and voltage, realize 6~10mm thick steel plate square groove can disposably penetrate, two-sides forming.Its is easy to operate, welds one-pass molding, and easy to implement, welding effect is good, and new welding method is provided for high-quality welding, can effectively instruct the selection of actual welding method, and the technique for improving Combined Welding has important practical value and meaning.
Description
Technical field
The present invention relates to a kind of welding methods of low-alloy high-strength steel sheet, and in particular to a kind of low-alloy high-strength steel sheet
Laser-MIG electric arc complex welding method, belong to material welding technology field.
Background technique
In welding fields such as machinery, automobile, ship, pipeline, petrochemical industry, pressure vessels, the most common welding method is
Welding electrode arc welding (SMAW), flux cored wire arc welding (FCAW), gas metal-arc welding (GMAW).However, these welding skills
Art not only time and effort consuming, also will cause some welding defects such as stomata, deformation and crackle.
Laser-arc hybrid welding in industry combines the advantage of laser welding and arc welding, is a kind of emerging special process
Technology, the completely different heat source of two kinds of physical properties of laser and electric arc, energy transmission mechanism is combined with each other by it, acts on same
One molten bath had not only given full play to two kinds of respective advantages of heat source, but also has compensated for respective deficiency, formd a kind of efficient heat
Source, so that fusion penetration increases, speed of welding increases, welding deformation reduces.
Laser-arc hybrid welding in industry can realize the complete penetration of cut deal by single-run welding, lower with heat input,
Welding quality, simplified welding procedure, shortening weld interval etc. are being improved in the features such as welding heat affected zone is relatively narrow and welding efficiency is high
Aspect is with the obvious advantage, in addition, it is suitble to all-position welding, the intensity of postwelding connector is very high, in machinery, automobile, ship, pipe
Road, petrochemical industry, pressure vessel manufacturing field are a very promising welding techniques.
But for steel sheet, then there is certain hinder in the application of laser-arc hybrid welding in industry.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of laser-of low-alloy high-strength steel sheet
MIG arc hybrid welding method.
In order to achieve the above objectives, the present invention adopts the following technical scheme that:
A kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet, welding procedure be single face welding and double face at
Shape, comprising the following steps:
S1, docking steel sheet, so that banjo fixing butt jointing is in I type, there are certain groove gaps；
S2, according to the service performance of materials to be welded material and welding point, selection has certain chemical component and mechanical property
The filler wire of energy；
S3, setting welding condition, including laser power, speed of welding, MIG welding current, weldingvoltage；
S4, during laser-MIG electric arc composite welding, using laser in the posterior mode of preceding, electric arc, select noble gas
For laser radiation gas, and the angle between MIG welding gun and welding plate, between laser welding gun and welding plate is kept respectively, according to setting
Parameter carry out composite welding.
Steel sheet with a thickness of 6~10mm in above-mentioned steps S1；Groove gap is 0~0.5mm.
Further, the diameter of above-mentioned filler wireFor 1.2mm.
Weldingvoltage in above-mentioned steps S3 is 18~20V, and welding current is 230~250A, speed of welding 0.6m/
Min, laser power are 3.5~5kW.
Angle in above-mentioned steps S4 between MIG welding gun and welding plate is 60~70 °, and angle is between laser welding gun and welding plate
90±1°。
In welding process in above-mentioned steps S4, defocusing amount is 0~2mm, and optical fiber spacing is 1~2mm；Noble gas is straight argon
Gas, throughput 25-30L/min.
The invention has the beneficial effects that:
The laser-MIG electric arc complex welding method of a kind of low-alloy high-strength steel sheet of the invention, by laser-MIG electric arc
Compound welding technology applies in the butt welding of steel sheet, can penetrate steel plate with square groove single-run welding, realize single welding
The welding procedure of two-sides forming, it is easy to operate, one-pass molding is welded, easy to implement, welding effect is good, mentions for high-quality welding
New welding method has been supplied, the selection of actual welding method can be effectively instructed, the technique for improving Combined Welding has weight
The practical value and meaning wanted.
Detailed description of the invention
Fig. 1 is appearance of weld figure of the invention；
Fig. 2 is the Cross Section Morphology figure of weld seam of the invention；
Fig. 3 is the micro-organization chart of welding point of the invention, the fine grain heat affected area (Arc including upper arc region
FGHAZ), the coarse grain heat affect zone (Laser CGHAZ) of lower laser zone, lower laser zone fine grain heat affected area (Laser
FGHAZ), the coarse grain heat affect zone (Arc CGHAZ) of upper arc region.
Specific embodiment
Specific introduce is made to the present invention below in conjunction with the drawings and specific embodiments.
The present invention is used having a size of 200mm × 100mm × 10mm S355 steel plate.
Composite welding system is made of the fiber laser system and MIG arc welding mechanism of 10kW.
A kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet, welding procedure be single face welding and double face at
Shape, comprising the following steps:
S1, docking steel sheet, so that banjo fixing butt jointing is in I type, there are the groove gaps of 0~0.5mm；
S2, according to the service performance of materials to be welded material and welding point, selection has certain chemical component and mechanical property
The diameter of energyFor the filler wire of 1.2mm；
S3, setting welding condition, including laser power is 3.5~5kW, the welding of speed of welding 0.6m/min, MIG
Electric current is 230~250A, weldingvoltage is 18~20V；
S4, during laser-MIG electric arc composite welding, using laser in the posterior mode of preceding, electric arc, select straight argon
Gas is laser radiation gas, and throughput 25-30L/min, defocusing amount is 0~2mm, and optical fiber spacing is 1~2mm；And it protects respectively
Hold that the angle between MIG welding gun and welding plate is 60~70 °, the angle between laser welding gun and welding plate is 90 ± 1 °, according to setting
Parameter carry out composite welding.
Embodiment
Dock steel sheet, groove gap 0.5mm；
Laser radiation gas is pure argon, and protection air-flow amount is 25L/min；The packing material used is diameter
ER307Mo stainless steel welding stick.Angle between MIG welding gun and welding plate is 60 °, the angle between laser welding gun and welding plate is 90
±1°
The technological parameter of composite welding are as follows: laser power 5kW, defocusing amount 2mm, optical fiber spacing 2mm；Speed of welding
For 0.6m/min, MIG welding current is 230A, weldingvoltage 18V.
The specific geometrical morphology parameter of seam center includes fusion penetration, molten wide and reinforcement.
Appearance of weld is as shown in Fig. 1: as seen from Figure 1, appearance of weld is good, splashes smaller, no surface pores is split
Line defect.
Section of weld joint macro morphology is as shown in Fig. 2: from Figure 2 it can be seen that steel plate penetrates, forming is good, no internal porosity, not
The defects of fusion.The measurement that molten wide, fusion penetration and reinforcement are carried out using stereomicroscope, obtains that molten wide is 8.95mm, reinforcement is
2.10mm。
In the test, the microscopic structure of welding point different parts is as shown in Fig. 3, the hot shadow of the fine grain including upper arc region
Ring area (Arc FGHAZ), the coarse grain heat affect zone (Laser CGHAZ) of lower laser zone, lower laser zone fine grain heat affected area
The coarse grain heat affect zone (Arc CGHAZ) of (Laser FGHAZ), upper arc region.
As seen from Figure 3, the microscopic structure of welding point is coarseer in electric arc coarse grain zone and laser coarse grain zone microstructure, and in electricity
Arc fine grained region and laser fine grained region tissue are all thinner, and major tissue types are bainite, illustrate that the tissue of welding point hardens
Property be not very big, therefore intensity with higher and toughness, comprehensive mechanical property are preferable.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (6)
1. a kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet, which is characterized in that welding procedure is single
Weld two-sides forming in face, comprising the following steps:
S1, docking steel sheet, so that banjo fixing butt jointing is in I type, there are certain groove gaps；
S2, according to the service performance of materials to be welded material and welding point, select that there is certain chemical composition and mechanical property
Filler wire；
S3, setting welding condition, including laser power, speed of welding, MIG welding current, weldingvoltage；
S4, during laser-MIG electric arc composite welding, using laser in the posterior mode of preceding, electric arc, it is sharp for selecting noble gas
Light protective gas, and the angle between MIG welding gun and welding plate, between laser welding gun and welding plate is kept respectively, according to the ginseng of setting
Number carries out composite welding.
2. a kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet according to claim 1, special
Sign is, steel sheet with a thickness of 6~10mm in the step S1；Groove gap is 0~0.5mm.
3. a kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet according to claim 2, special
Sign is, the diameter of the filler wireFor 1.2mm.
4. a kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet according to claim 1, special
Sign is that the weldingvoltage in the step S3 is 18~20V, and welding current is 230~250A, speed of welding 0.6m/
Min, laser power are 3.5~5kW.
5. a kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet according to claim 1, special
Sign is that the angle in the step S4 between MIG welding gun and welding plate is 60~70 °, and angle is between laser welding gun and welding plate
90±1°。
6. a kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet according to claim 1, special
Sign is, in the welding process in the step S4, defocusing amount is 0~2mm, and optical fiber spacing is 1~2mm；Noble gas is pure argon,
Throughput is 25-30L/min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910587607.7A CN110142512A (en) | 2019-07-02 | 2019-07-02 | A kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet |
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|---|---|---|---|
| CN201910587607.7A CN110142512A (en) | 2019-07-02 | 2019-07-02 | A kind of laser-MIG electric arc complex welding method of low-alloy high-strength steel sheet |
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| CN110142512A true CN110142512A (en) | 2019-08-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355480A (en) * | 2020-11-18 | 2021-02-12 | 上海中船临港船舶装备有限公司 | Single-side welding and double-side welding method for corner joint of medium plate |
| CN113333957A (en) * | 2021-05-21 | 2021-09-03 | 南京钢铁股份有限公司 | laser-MAG (metal active gas) arc hybrid welding method for wide thin plate for ship |
Citations (4)
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| CN102935556A (en) * | 2012-10-11 | 2013-02-20 | 中国兵器工业第五二研究所 | Laser and MIG (metal-inert gas) arc composited welding method for high-nitrogen steel |
| CN103801845A (en) * | 2014-03-13 | 2014-05-21 | 机械科学研究院哈尔滨焊接研究所 | Iron-based or nickel-based material laser MIG composite surfacing method on basis of light beam scanning |
| CN103831541A (en) * | 2013-12-05 | 2014-06-04 | 北京航星机器制造有限公司 | Laser and MIG electric arc compound welding method for high-strength steel butt joints |
| CN104907696A (en) * | 2015-06-03 | 2015-09-16 | 广东省工业技术研究院(广州有色金属研究院) | Laser-arc hybrid welding method with welding current value considered |
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2019
- 2019-07-02 CN CN201910587607.7A patent/CN110142512A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935556A (en) * | 2012-10-11 | 2013-02-20 | 中国兵器工业第五二研究所 | Laser and MIG (metal-inert gas) arc composited welding method for high-nitrogen steel |
| CN103831541A (en) * | 2013-12-05 | 2014-06-04 | 北京航星机器制造有限公司 | Laser and MIG electric arc compound welding method for high-strength steel butt joints |
| CN103801845A (en) * | 2014-03-13 | 2014-05-21 | 机械科学研究院哈尔滨焊接研究所 | Iron-based or nickel-based material laser MIG composite surfacing method on basis of light beam scanning |
| CN104907696A (en) * | 2015-06-03 | 2015-09-16 | 广东省工业技术研究院(广州有色金属研究院) | Laser-arc hybrid welding method with welding current value considered |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355480A (en) * | 2020-11-18 | 2021-02-12 | 上海中船临港船舶装备有限公司 | Single-side welding and double-side welding method for corner joint of medium plate |
| CN113333957A (en) * | 2021-05-21 | 2021-09-03 | 南京钢铁股份有限公司 | laser-MAG (metal active gas) arc hybrid welding method for wide thin plate for ship |
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Application publication date: 20190820 |
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