CN105798462A - Welding method utilizing laser-MAG compound heat source - Google Patents
Welding method utilizing laser-MAG compound heat source Download PDFInfo
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- CN105798462A CN105798462A CN201410853635.6A CN201410853635A CN105798462A CN 105798462 A CN105798462 A CN 105798462A CN 201410853635 A CN201410853635 A CN 201410853635A CN 105798462 A CN105798462 A CN 105798462A
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Abstract
The invention discloses a welding method utilizing a laser-MAG compound heat source. According to the method, single-side single-track single-layer double-face forming and butt welding are implemented to a thick high-strength or ultra-high-strength steel plate by utilizing a laser-MAG compound heat source; the butt welding position is an I-type groove; a workpiece is preheated by adopting laser or oxyacetylene torch before welding; and heat preservation is carried out for 20min-1h after welding. The welding technological parameters are as follows: the diameter of a laser spot is 0.3-1mm, the laser power is 4-10KW, the arc current is 200-300A, and the arc voltage is 25.2-30V. According to the method, by improving the groove form of the workpiece and reserving assembly interval and optimized welding parameters in splicing, butt welding of the ultra-high-strength steel plate is achieved, the performances of a welding line joint are prior to conventional TIG welding, the welding speed can achieve 60m/h, and the welding efficiency is improved by ten times compared with conventional TIG welding.
Description
One, technical field
The present invention relates to laser-arc hybrid welding process slab processing technique field, be specifically related to a kind of high-strength for slab or super-high strength steel welding laser-MAG compound welding method.
Two, background technology
Laser weld is using the laser beam that can focus on as welding energy.When high intensity laser beam is radiated on materials to be welded surface, part luminous energy will be absorbed by material and be transformed into heat energy, make melt material, thus reaching the purpose of welding.Generally to determine, according to the optical property of materials to be welded (such as reflection and absorb) and thermal property (such as fusing point, pyroconductivity, thermal diffusivity, the latent heat of fusion etc.), the power density of laser and the pulsewidth etc. that use.For common metal, light intensity absorption coefficient is approximately in 105～109 centimetre of-1 order of magnitude.If the power density of laser is 105～109 watts/centimetre 2, then it is micron number magnitude in the penetration depth of metal surface.Produce splatter or pitfall during for avoiding welding, laser power density will be controlled, make metallic surface temperature maintain near boiling point.To common metal, laser power density often takes 105～106 watts/centimetre about 2.Laser Welding is connected to many advantages.It has the prominent advantages that refractory metal or the welding of two kinds of different metals, and hot spot is little, and thermal deformation is little, also the parts in transparent outer cover can be welded, is adapted for carrying out automatization.Along with high-strength and that super-high strength steel is in space flight and aviation and other military equipment fast development, on the basis meet property of welded joint, slab is high-strength and super-high strength steel welding efficiency it is also proposed higher requirement.Slab is high-strength or super-high strength steel splicing is welded, and domestic industry mainly adopts the conventional TIG weld of the reserved root face of bevel.By the impact of himself technique of TIG weld, speed of welding and welding penetration, needing to open in advance the multi-pass welding of Y-Shaped groove for slab welding, these problems inhibit the raising of slab welding efficiency.In existing employing laser-arc hybrid welding process welding high-strength steel technology, a kind of disclosed in Chinese patent application (publication number CN101367157A) weld high-strength or super-high strength steel slab welding method, slab butt welding piece is adopted and opens 60 ° of " V " type grooves, or offer the mode of 60 ° of " X " type grooves, its shortcoming is that speed of welding is slow, does not bring efficient production under high cost laser-arc composite heat power supply puts into.Additionally, Chinese patent application (publication number CN101733564A) discloses a kind of weld gap and controls the laser-electric arc composite heat source high-speed welding method of the super-high strength steel at 0mm, its shortcoming is that assemble welding tolerance is low, and the assembly before workpiece being welded in producing reality brings great difficulty and inconvenience.
Three, summary of the invention
In order to solve Problems existing in high-strength in prior art or super-high strength steel welding, the present invention provides a kind of welding method utilizing laser-MAG composite heat power supply, the method is by improving workpiece grooves form, during splicing reserved assembly building from and the welding parameter that optimizes, achieve high-strength or ultra-high strength steel plate welding, its welding line joint performance is better than conventional TIG weldering, and speed of welding is up to 50m/h, and welding efficiency is compared conventional TIG weld and improved ten times.
Technical scheme is as follows:
A kind of welding method utilizing laser-MAG composite heat power supply, the method is high-strength for slab or super-high strength steel workpiece, utilizes laser composite heat power supply under a shielding gas it to be implemented unilateral single track single-layer double-side molding welding；Specifically include following steps:
(1) splicing workpiece: open I-type groove at position to welding, splices spacing 0.5～2mm；
(2) preheating: workpiece is adopted laser or oxyacetylene torch preheating, preheats temperature 150～250 DEG C；
(3) laser-MAG compound welding: namely adopt electric arc front along welding direction after reaching preheating temperature, the posterior complex form welding of laser beam；Welding condition: laser spot diameter 0.3～10mm, laser power 4～10KW, arc current 100～300A, arc voltage 15.2～30V.
(4) postweld heat preservation: transfer weldment, to holding furnace inside holding, is incubated 0min～1h, then cools to room temperature with the furnace under 50～200 DEG C of conditions.
When carrying out laser compound welding, arc welding gun and surface of the work angle 45 °, speed of welding 1～5m/min, chevilled silk spacing 3mm.
Described protective gas is argon (Ar) and carbon dioxide (CO2) mixes gas, carbon dioxide (CO2) volume content 0～20%, shield gas flow rate 15～30L/min.
Described thickness of workpiece is 8～20mm, and welding wire material selects according to workpiece material, gage of wire 0.8～2.0mm, and dry extension of electrode degree is 15mm.
Step (1) front to workpiece welding portion angle mill polishing and clean with acetone.
The invention has the beneficial effects as follows:
The present invention is ensureing on the basis that welding line joint performance is better than conventional TIG weldering, by improving workpiece grooves form, during splicing reserved assembly building from, the unilateral single track single-layer double-side molding welding of 10mm thickness ultra-high strength steel plate can be realized, speed of welding can reach 60m/h, and welding efficiency is compared conventional TIG weld and improved ten times.1～1.5mm splices spacing and improves the laser-MAG compound welding operability in slab ultra-high strength steel plate welding.
Four, accompanying drawing explanation
Fig. 1 is laser-MAG compound welding method schematic diagram of the present invention.
Wherein 1 is laser, and 2 is arc welding gun head, and 3 is welding wire, and 4 is ultra-high strength steel plate, and 5 is weld seam.
Five, detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
The embodiment of the present invention is applied laser-MAG compound welding technology, laser instrument adopts the Germany IPG YLS-10000 type optical fiber laser manufactured, peak power output is 10KW, Laser Transmission adopts 200 μm of core optical fibers, laser Machining head is the YW52 of PRECITEC company, focus on 300mm, collimate 150mm.Electric arc adopts the digital IGBT inversion control DC pulse MAG/MIGCO2/MAG automatic welding machine of OTC company of Japan, and preheating device is the heating of oxyacetylene torch rifle or laser preheating, and postwelding is heated insulation slow cooling and processes.
Embodiment
As it is shown in figure 1, welding base metal is the 31Si2MnCrMoVE ultra-high strength steel plate 4 of thickness 10mm, tensile strength 1600MPa in the present embodiment, welding wire 3 is diameter 0.2mm.First polish off rust position in welding, clean with acetone.Then carry out as follows: (1) clamping welding sheet material: open I-type groove at position to welding, splice spacing 1～2mm；(2) adopt oxyacetylene torch preheating, control preheating temperature within the scope of 150 DEG C～250 DEG C；(3) laser-MAG compound welding: namely adopt electric arc front along welding direction after reaching preheating temperature, the posterior complex form welding of laser 3；Welding condition: laser spot diameter 0.3～1mm, laser power 4.2KW, arc current 280A, arc voltage 28.2V；Speed of welding 1m/min, protective gas (argon) flow 25L/mm, wire feed angle is 45 °, and chevilled silk spacing is 3mm, and stem elongation degree is 15mm.(4) postwelding transfer weldment is to 200 DEG C of constant holding furnaces, is slowly cooled to room temperature with stove after being incubated 1 hours.
Being detected by butt welded seam in the present embodiment and do not find crackle, weld seam positive and negative molding is good, detects weld seam by X ray and is absent from gas hole defect, and the tensile strength of welding point can reach 1910Mpa, suitable with substrate intensity.Maximum 30 ° of welding point angle of bend.Compared with existing TIG weld, welding efficiency is obvious, and speed reaches 30m/min, is equivalent to conventional TIG and welds decades of times raising, and welding point toughness, plasticity are superior to conventional TIG.I-type groove and a range of tolerance of welding spacing is added the motility of operation.
Above-described embodiment is merely to illustrate the concrete technical scheme of the present invention, it is not intended to limit, and in application, extend to other amendment, change, application and embodiment, in thinking that all such amendments, change, application and embodiment would be within the spirit and scope of the present invention simultaneously.
Claims (5)
1. the welding method utilizing laser-MAG composite heat power supply, it is characterised in that: the method is high-strength for slab or super-high strength steel workpiece, utilizes laser-MAG composite heat power supply under a shielding gas it to be implemented unilateral single track single-layer double-side molding welding；Specifically include following steps:
(1) splicing workpiece: open I-type groove at position to welding, splices spacing 0.5～2mm；
(2) preheating: workpiece is adopted laser or oxyacetylene torch preheating, preheats temperature 150～250 DEG C；
(3) laser-MAG compound welding: namely adopt electric arc front along welding direction after reaching preheating temperature, the posterior complex form welding of laser beam；Welding condition: laser spot diameter 0.3～1mm, laser power 4～10KW, arc current 200～300A, arc voltage 25.2～30V.
(4) postweld heat preservation: transfer weldment, to holding furnace inside holding, is incubated 20min～1h, then cools to room temperature with the furnace under 150～200 DEG C of conditions.
2. welding method according to claim 1, it is characterised in that: when carrying out laser-MAG compound welding, arc welding gun and surface of the work angle 45 °, speed of welding 1～5m/min, chevilled silk spacing 3mm.
3. welding method according to claim 1, it is characterised in that: described shield gas flow rate 15～30L/min, protective gas is the mixing gas of argon and carbon dioxide, carbon dioxide volume content 0～20%.
4. welding method according to claim 1, it is characterised in that: described thickness of workpiece is 8～20mm.Solder wire material selects according to workpiece material, gage of wire 0.8～2.0mm, dry extension of electrode degree 15mm.
5. welding method according to claim 1, it is characterised in that: step (1) front to workpiece welding portion polishing and clean with acetone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410853635.6A CN105798462A (en) | 2014-12-31 | 2014-12-31 | Welding method utilizing laser-MAG compound heat source |
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| CN201410853635.6A CN105798462A (en) | 2014-12-31 | 2014-12-31 | Welding method utilizing laser-MAG compound heat source |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735968A (en) * | 2016-12-02 | 2017-05-31 | 机械科学研究总院青岛分院 | A kind of laser electrical arc complex welding method |
| CN107442938A (en) * | 2017-09-28 | 2017-12-08 | 张家港市旭华激光有限公司 | A kind of method for laser welding of big thickness dual-workpiece |
| CN109500497A (en) * | 2018-12-27 | 2019-03-22 | 长沙理工大学 | A kind of method of welded blank |
| CN109641309A (en) * | 2016-08-17 | 2019-04-16 | 钢材康托尔有限责任两合公司 | Laser beam-MSG the hybrid welding process of high-intensitive Relationship between Software Fine-grained Components using targetedly induction heat transfer |
| CN110340530A (en) * | 2019-07-02 | 2019-10-18 | 上海交通大学 | A kind of cut deal Laser-Arc Hybrid Welding weld seam two-sides forming control method |
| CN113305419A (en) * | 2021-05-25 | 2021-08-27 | 苏州科韵激光科技有限公司 | Automatic accurate positioner |
| 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 |
| DE102020212859A1 (en) | 2020-10-12 | 2022-04-14 | Fronius International Gmbh | Laser hybrid welding process |
-
2014
- 2014-12-31 CN CN201410853635.6A patent/CN105798462A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109641309A (en) * | 2016-08-17 | 2019-04-16 | 钢材康托尔有限责任两合公司 | Laser beam-MSG the hybrid welding process of high-intensitive Relationship between Software Fine-grained Components using targetedly induction heat transfer |
| CN106735968A (en) * | 2016-12-02 | 2017-05-31 | 机械科学研究总院青岛分院 | A kind of laser electrical arc complex welding method |
| CN107442938A (en) * | 2017-09-28 | 2017-12-08 | 张家港市旭华激光有限公司 | A kind of method for laser welding of big thickness dual-workpiece |
| CN109500497A (en) * | 2018-12-27 | 2019-03-22 | 长沙理工大学 | A kind of method of welded blank |
| CN109500497B (en) * | 2018-12-27 | 2020-10-23 | 长沙理工大学 | Method for welding plate |
| CN110340530A (en) * | 2019-07-02 | 2019-10-18 | 上海交通大学 | A kind of cut deal Laser-Arc Hybrid Welding weld seam two-sides forming control method |
| DE102020212859A1 (en) | 2020-10-12 | 2022-04-14 | Fronius International Gmbh | Laser hybrid welding process |
| 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 |
| CN113305419A (en) * | 2021-05-25 | 2021-08-27 | 苏州科韵激光科技有限公司 | Automatic accurate positioner |
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