CN107283060A - A kind of laser-arc is combined multi-pass welding method - Google Patents
A kind of laser-arc is combined multi-pass welding method Download PDFInfo
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- CN107283060A CN107283060A CN201710423664.2A CN201710423664A CN107283060A CN 107283060 A CN107283060 A CN 107283060A CN 201710423664 A CN201710423664 A CN 201710423664A CN 107283060 A CN107283060 A CN 107283060A
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- welding
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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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
- Arc Welding In General (AREA)
Abstract
A kind of laser-arc is combined multi-pass welding method, and first against the steel or aluminium alloy workpiece to be welded that thickness is 10~40mm, the narrow groove of Y types with root face, double inclined plane is issued in advance；Then bottoming welding is carried out to groove root using Laser Welding or laser-arc hybrid welding process；Multi-pass welding is finally carried out to follow-up groove using laser-arc hybrid welding process, and laser uses pulse mode with melt pole electrical arc.The present invention carries out multi-pass welding due to treating the groove of welder's part using laser-arc hybrid welding process, it is not only able to realize high-speed welding, reduce welding bead quantity, so as to improve joint preparation efficiency, and higher weldering speed can reduce the size of weld dimensions metallic particles, so as to obtain good quality solder joints.Also, the process of the present invention is simple, easy to operate, and implementation cost is low, can be applied to different technologies field and prepares high-quality Metal Material Welding joint, such as longitudinal joint pipe, railway carriage, automobile bodies, hull, ocean platform, rocket rocket body.
Description
Technical field
The present invention relates to a kind of welding method, it is specifically related to a kind of laser-electric arc for steel or Al alloy parts and answers
Close multi-pass welding method.
Background technology
Electric arc multi-pass welding method can determine joint fusing gold extensively using in the industrial production according to its computational methods
Belong to area, welding road number, backing welding and fill welding current, voltage, speed of welding etc..So just it can set welding point long
Degree, it is preceding together fusion penetration and face a cooling velocity, according to the relation of determination cause welding current, voltage and weldering speed value error ±
Within 5%.Meanwhile, packed layer is implemented in the case of preheating to weld, it is to avoid form quenching structure in welding point metal, can
Improve welding point combination property.It is however a drawback of the method that being both used for using carbon-dioxide protecting gas consumable electrode arc welding
Root bead is connect, and follow-up multi-pass welding is used for again, and its speed of welding is significantly less than plasma and Laser Welding Speed, low production efficiency.
In addition, sufficiently large groove must be opened by implementing the welding of the type, it is meant that the size increase in molten bath need to be filled, caused corresponding
Welding metal heat input increases, and then causes the increase of weld dimensions metal grain size, seriously reduces joint strong
Degree and plasticity.
In order to eliminate disadvantages mentioned above, following multi-pass welding method is employed in the prior art, i.e., first using Laser Welding or sharp
Optical-electronic arc Combined Welding weld root weld seam, and follow-up multiple tracks groove uses metal molten pole inert gas shielding pulse arc welding
To realize filling.This method can improve speed of welding and welding productivity, reduce bevel angle and improve weld shape.With CO2
Gas shielded arc welding is compared, consumable electrode noble gas protective pulse arc welding multi-pass welding groove, is reduced to a certain extent
The size of weld dimensions metal grain, but with plasma weldering or Laser Welding compared with, can cause welding point intensity and
Plasticity is reduced.
The content of the invention
It is an object of the invention to for it is above-mentioned exist problem and shortage there is provided a kind of process simple, easy to operate, Neng Goushi
Existing high-speed welding, reduction welding bead quantity and the compound multi-pass welding method of laser-electric arc for obtaining good quality solder joints.
The technical proposal of the invention is realized in this way：
Laser-electric arc of the present invention is combined multi-pass welding method, is characterized in comprising the following steps：
Step 1: for steel or aluminium alloy workpiece to be welded that thickness is 10~40mm, the Y types with root face, double inclined plane are issued in advance
Narrow groove；
Step 2: carrying out bottoming welding to groove root using Laser Welding or Laser-Arc Hybrid Welding；When use Laser Welding is to slope
When mouth root is welded, root face a=4~6mm of the narrow groove of Y types, bottom width b=3~5mm, groove bottom angle of chamfer β=40
~50 °, tangent plane angle α=5~15 °, and laser power is 4~5kW；Groove root is answered when using Laser-Arc Hybrid Welding
When closing welding, root face a=6~8mm of the narrow groove of Y types, bottom width b=7~9mm, groove bottom angle of chamfer β=40~50 ° are cut
Face angle α=5~15 °, and laser power is 4~5kW, the welding current of melt pole electrical arc is 150~250A, and laser and fusing
Pole electrical arc uses pulse mode, and pulse frequency is 380~400Hz；
Step 3: carrying out multi-pass welding to follow-up groove using Laser-Arc Hybrid Welding, the weldering speed of per pass is 90~120m/h,
And laser power is 4~5kW, the welding current of melt pole electrical arc is 150~250A, and during composite welding, laser with
Melt pole electrical arc uses pulse mode, and pulse frequency is 380~400Hz.
Wherein, the laser is by disk, optical fiber, CO2Or Nd:YAG laser is produced.
The present invention compared with prior art, with following remarkable advantage：
The present invention carries out multi-pass welding due to treating the groove of welder's part using Laser-Arc Hybrid Welding, is not only able to realize height
Speed welding, reduces welding bead quantity, so that joint preparation efficiency is improved, and also higher weldering speed can reduce weld dimensions
The size of metallic particles, so as to obtain good quality solder joints.Also, the process of the present invention is simple, easy to operate, implementation cost
It is low, it can be applied to different technologies field and prepare high-quality Metal Material Welding joint, such as longitudinal joint pipe, railway carriage, automobile
Compartment, hull, ocean platform, rocket rocket body etc..
The present invention is further illustrated below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is workpiece grooves schematic diagram to be welded of the invention.
Fig. 2 is X70 welding point macroscopic cross section figures in embodiments of the invention one.
Fig. 3 is X70 welding point macroscopic cross section figures in the implementation case two of the present invention.
Embodiment
Laser-electric arc of the present invention is combined multi-pass welding method, comprises the following steps：
Step 1: for steel or aluminium alloy workpiece to be welded that thickness is 10~40mm, the Y types with root face, double inclined plane are issued in advance
Narrow groove（As shown in Figure 1）；
Step 2: carrying out bottoming welding to groove root using Laser Welding or Laser-Arc Hybrid Welding；When use Laser Welding is to slope
When mouth root is welded, root face a=4~6mm of the narrow groove of Y types, bottom width b=3~5mm, groove bottom angle of chamfer β=40
~50 °, tangent plane angle α=5~15 °, and laser power is 4~5kW；Groove root is answered when using Laser-Arc Hybrid Welding
When closing welding, root face a=6~8mm of the narrow groove of Y types, bottom width b=7~9mm, groove bottom angle of chamfer β=40~50 ° are cut
Face angle α=5~15 °, and laser power is 4~5kW, the welding current of melt pole electrical arc is 150~250A, and laser and fusing
Pole electrical arc uses pulse mode, and pulse frequency is 380~400Hz；Moreover, laser is by disk, optical fiber, CO2Or Nd:YAG swashs
Light device is produced；
Step 3: carrying out multi-pass welding to follow-up groove using Laser-Arc Hybrid Welding, the weldering speed of per pass is 90~120m/h,
And laser power is 4~5kW, the welding current of melt pole electrical arc is 150~250A, and during composite welding, laser with
Melt pole electrical arc uses pulse mode, and pulse frequency is 380~400Hz；Moreover, laser is by disk, optical fiber, CO2Or Nd:
YAG laser is produced.Certainly, according to the thickness of workpiece to be welded, it would however also be possible to employ Laser-Arc Hybrid Welding is carried out to follow-up groove
Single track is welded.
Below by specific embodiment, the present invention is further illustrated.
Embodiment one：
Material to be welded is X70, in thick 25mm high-strength steel X70 according to Fig. 1（It is shown in Table 1）Welding edge opens Y type grooves.Pass through
Laser-melting is electric arc combined to be soldered into root run and follow-up groove welding bead.Now, laser power is used for 4.4kW, laser
Type is Nd:YAG laser, the voltage of melt pole electrical arc is 24V, and the welding current of melt pole electrical arc is 200A, and weldering speed is
90m/h, wire feed rate is 20L/min, and protection gas is 18%CO2+ 82%Ar mixed gas, welding wire be the С of С в -08 Г 2 (
1.2mm).Five road welding are carried out altogether, and welding point pattern is as shown in Figure 2.Impact flexibility KCV experiments show, in -20 DEG C of temperature
When, when the impact flexibility of mother metal is 320J/cm2When, weld seam impact toughness is 100J/cm2, the impact flexibility of heat affected area is
250J/cm2, it is qualified index.
Implement row two：
Material to be welded is X70, in thick 20mm high-strength steel X70 according to Fig. 1（It is shown in Table 1）Welding edge opens Y type grooves.Pass through
Laser-melting is electric arc combined to be soldered into root run and follow-up groove welding bead.Now, laser power is used for 2.7kW, laser
Type is Nd:YAG laser, the voltage of melt pole electrical arc is 25V, and the welding current of melt pole electrical arc is 200A, and weldering speed is
100m/h, protection gas is 18%CO2+ 82%Ar mixed gas, welding wire is the С (1.2mm) of С в -08 Г 2, and wire feed rate is
20L/min.Four road welding are carried out altogether, and welding point pattern is as shown in Figure 3.Impact flexibility KCV experiments show, in temperature -20
DEG C when, when mother metal impact flexibility be 320J/cm2When, weld seam impact toughness is 60J/cm2, the impact flexibility of heat affected area is
210J/cm2.The experiment shows, in order to improve the impact flexibility of multi-pass welding joint, it is necessary to improve weldering speed.
The steel chemical composition used in the process of the test of table 1.（Content, %）
| № | The trade mark | С | Mn | Si | Cu | Ni | Cr | V | P | S |
| 1. | Х70 | 0.09~0.12 | 1.55~1.75 | 0.15~0.50 | <0.30 | <0.30 | <0.30 | 0.08~0.12 | 0.020 | 0.006 |
| 2. | Св-08Г2С | 0.08 | 1.50 | 0.85 | - | - | - | - | <0.035 | <0.040 |
The present invention is described by embodiment, but not limited the invention, disclosed with reference to description of the invention
Embodiment other change, be such as readily apparent that for the professional person of this area, such change should belong to this hair
Within the scope of bright claim is limited.
Claims (2)
1. a kind of laser-electric arc is combined multi-pass welding method, it is characterised in that comprise the following steps：
Step 1: for steel or aluminium alloy workpiece to be welded that thickness is 10~40mm, the Y types with root face, double inclined plane are issued in advance
Narrow groove；
Step 2: carrying out bottoming welding to groove root using Laser Welding or Laser-Arc Hybrid Welding；When use Laser Welding is to slope
When mouth root is welded, root face a=4~6mm of the narrow groove of Y types, bottom width b=3~5mm, groove bottom angle of chamfer β=40
~50 °, tangent plane angle α=5~15 °, and laser power is 4~5kW；Groove root is answered when using Laser-Arc Hybrid Welding
When closing welding, root face a=6~8mm of the narrow groove of Y types, bottom width b=7~9mm, groove bottom angle of chamfer β=40~50 ° are cut
Face angle α=5~15 °, and laser power is 4~5kW, the welding current of melt pole electrical arc is 150~250A, and laser and fusing
Pole electrical arc uses pulse mode, and pulse frequency is 380~400Hz；
Step 3: carrying out multi-pass welding to follow-up groove using Laser-Arc Hybrid Welding, the weldering speed of per pass is 90~120m/h,
And laser power is 4~5kW, the welding current of melt pole electrical arc is 150~250A, and during composite welding, laser with
Melt pole electrical arc uses pulse mode, and pulse frequency is 380~400Hz.
2. laser-electric arc according to claim 1 is combined multi-pass welding method, it is characterised in that：The laser by disk,
Optical fiber, CO2Or Nd:YAG laser is produced.
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| CN201710423664.2A CN107283060A (en) | 2017-06-07 | 2017-06-07 | A kind of laser-arc is combined multi-pass welding method |
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| CN201710423664.2A CN107283060A (en) | 2017-06-07 | 2017-06-07 | A kind of laser-arc is combined multi-pass welding method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971758A (en) * | 2018-10-24 | 2018-12-11 | 哈尔滨阿尔特机器人技术有限公司 | A kind of laser-compound backing weld method of heated filament MIG based on light beam scanning |
| CN110091067A (en) * | 2019-06-06 | 2019-08-06 | 上海工程技术大学 | A kind of laser and K-TIG complex welding method for welding cut deal |
| CN111702334A (en) * | 2020-06-05 | 2020-09-25 | 成都先进金属材料产业技术研究院有限公司 | Process method for welding X80 pipeline steel plate |
| CN112108771A (en) * | 2020-09-21 | 2020-12-22 | 中车长春轨道客车股份有限公司 | Carbon steel butt joint laser arc composite welding process parameter design method |
| CN112222653A (en) * | 2020-10-20 | 2021-01-15 | 中国石油天然气集团有限公司 | Welding method of layered bimetal composite plate |
| CN112427409A (en) * | 2020-10-28 | 2021-03-02 | 上海飞博激光科技有限公司 | Welding method capable of reducing inclusion defects inside weld joints of medium-thickness plates |
| CN114178701A (en) * | 2021-12-06 | 2022-03-15 | 中国兵器科学研究院宁波分院 | 7B52 aluminum alloy laser-electric arc hybrid welding positioning device and use method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108971758A (en) * | 2018-10-24 | 2018-12-11 | 哈尔滨阿尔特机器人技术有限公司 | A kind of laser-compound backing weld method of heated filament MIG based on light beam scanning |
| CN110091067A (en) * | 2019-06-06 | 2019-08-06 | 上海工程技术大学 | A kind of laser and K-TIG complex welding method for welding cut deal |
| CN111702334A (en) * | 2020-06-05 | 2020-09-25 | 成都先进金属材料产业技术研究院有限公司 | Process method for welding X80 pipeline steel plate |
| CN111702334B (en) * | 2020-06-05 | 2022-05-24 | 成都先进金属材料产业技术研究院股份有限公司 | Process method for welding X80 pipeline steel plate |
| CN112108771A (en) * | 2020-09-21 | 2020-12-22 | 中车长春轨道客车股份有限公司 | Carbon steel butt joint laser arc composite welding process parameter design method |
| CN112108771B (en) * | 2020-09-21 | 2022-10-21 | 中车长春轨道客车股份有限公司 | Method for designing technological parameters of laser-arc hybrid welding of V-shaped/Y-shaped carbon steel butt joint |
| CN112222653A (en) * | 2020-10-20 | 2021-01-15 | 中国石油天然气集团有限公司 | Welding method of layered bimetal composite plate |
| CN112427409A (en) * | 2020-10-28 | 2021-03-02 | 上海飞博激光科技有限公司 | Welding method capable of reducing inclusion defects inside weld joints of medium-thickness plates |
| CN112427409B (en) * | 2020-10-28 | 2022-05-13 | 上海飞博激光科技有限公司 | Welding method capable of reducing inclusion defects inside weld joints of medium-thickness plates |
| CN114178701A (en) * | 2021-12-06 | 2022-03-15 | 中国兵器科学研究院宁波分院 | 7B52 aluminum alloy laser-electric arc hybrid welding positioning device and use method thereof |
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