CN105328342A - Method for removing laser welding pores of medium-thick D406A ultra-high-strength steel - Google Patents
Method for removing laser welding pores of medium-thick D406A ultra-high-strength steel Download PDFInfo
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- CN105328342A CN105328342A CN201510897513.1A CN201510897513A CN105328342A CN 105328342 A CN105328342 A CN 105328342A CN 201510897513 A CN201510897513 A CN 201510897513A CN 105328342 A CN105328342 A CN 105328342A
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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
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
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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
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam 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
- B23K26/346—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
Abstract
The invention provides a method for removing laser welding pores of a medium-thick D406A ultra-high-strength steel, and aims at solving the problem of pores of a medium-thick D406A ultra-high-strength steel plate in welding. The method comprises the following steps: grinding and cleaning a part to be welded; assembling; setting backing weld and filling weld process parameters; controlling the welding process parameters through a robot integration system; arcing through TIG (Tungsten Inert Gas Welding) electric arc; stabilizing the electric arc for 1 to 2 seconds; controlling a laser to emit laser; finally controlling a robot to drive a laser working head and a TIG welding gun to work together to finish the welding process. According to the method, different pore inhibiting measures are carried out for backing weld and filling weld.
Description
Technical field
The present invention relates to the method for thick D406A super-high strength steel laser weld pore in a kind of elimination, belong to materials processing engineering field.
Background technology
Along with the development of aircraft industry, general structural steel can not meet the needs of important component, and unimach arises at the historic moment, and its tensile strength is high, good toughness, is widely used in space flight and aviation and weapon field.Unimach 30Si2MnCrMoVE (being called for short D406A), be the steel grade that China develops voluntarily, tensile strength is higher than 1620MPa, and percentage elongation is greater than 8%, is mainly used in solid rocket motor case.The common method of current welding D406A steel is TIG weldering and electron beam welding.TIG is welded into originally lower, but TIG weldering fusion penetration is more shallow, and the welding number of plies of needs is more, and this not only makes welding efficiency decline, and also can cause larger thermal weld stress, makes joint produce higher stress and larger distortion, unfavorable to the control of crackle; Electron beam welding can obtain good welding effect, but it needs to weld under vacuum conditions, this greatly limits the application of the method.
Laser-arc hybrid welding in industry is subject to extensive concern with the feature of its high efficiency, high-adaptability, large fusion penetration, low_input_power.Therefore, consider to utilize laser-electric arc composite heat source to carry out the welding of unimach, ensure welding quality, and significantly improve welding efficiency.But according to pertinent literature, when adopting the method to carry out high-strength steel welding, there will be gas hole defect, especially when in welding during thick D406A unimach, if it is shaping to carry out a through welding, then the situation of laser keyhole shakiness may be there is, gas hole defect is remarkable, therefore, in thick D406A unimach, the present invention proposes a kind of method of thick D406A super-high strength steel laser weld pore in elimination.
Summary of the invention
The present invention is intended to the pore problem existed for D406A ultra-high strength steel plate thick in welding, and proposes the method for thick D406A super-high strength steel laser weld pore in a kind of elimination.
The method of thick D406A super-high strength steel laser weld pore in a kind of elimination of the present invention, it carries out in accordance with the following steps:
Step one: before welding, according to thickness of slab, is processed into double groove by the position to be welded of workpiece to be welded, and polishes to the double groove after processing and both side surface or clean, and is fixed on welding tool setup by the workpiece to be welded after polishing or cleaning;
Step 2: utilize frock clamp laser head and TIG welding gun, wire feeder to be rigidly fixed;
Step 3: welding condition is set:
Backing welding: defocusing amount is ﹣ 3 ~ ﹢ 3mm, and laser power is 3000 ~ 5000W, and arc current is 100 ~ 400A, and laser-arc spacing is 5 ~ 6mm, and speed of welding is 50 ~ 500mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min;
Fill weldering: defocusing amount is ﹣ 3 ~ ﹢ 3mm, and laser power is 400 ~ 700W, arc current 200 ~ 400A, laser-arc spacing is 2 ~ 3mm, and speed of welding is 50 ~ 500mm/min, and protection gas adopts Ar gas, flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min;
Step 4: in actual welding process, robot integrated system is adopted to control welding condition, first TIG Arc, then after arc stability 1 ~ 2S, then laser control sends laser, and last control makes laser work head and TIG welding gun associated movement complete welding process.
The present invention comprises following beneficial effect:
The present invention is intended to thick high strength steel plate in welding, adopt the method for laser-TIG filler wire welding, carry out backing welding to weld two-layer welding obtain satisfactory weld seam with filling, its schematic diagram as shown in Figure 1, due to when bottoming welding is welded with filling, the type of pore is different from mechanism of production, and therefore, the present invention is directed to bottoming welding with filling welds and have employed different pore braking measures respectively.
In backing welding, in order to obtain larger fusion penetration, adopting the two thermal source composite welding of laser-TIG, mainly containing following two features compared to general laser-TIG silk filling composite welding: one. laser and TIG electric arc spacing d
l-Tthe General Requirements of 2-3mm should be greater than, increase to 5-6mm, d
l-Tincrease, the coupling of laser and electric arc can be reduced on the one hand to a certain extent, improve the stability of welding process, reduce the probability being involved in stomatal limiting value; On the other hand, it expands the area in molten bath, reduces the cooling velocity in molten bath, adds the time of liberation of pore, also can reduce prime coat pore curve; Two .TIG shielding gas flow amounts are greater than 35L/min, large shielding gas flow amount at utmost can dispel laser plasma on the one hand, reduce the loss of plasma for laser power, maximum welding penetration is obtained under equal laser power, on the other hand, this is because shielding gas flow amount increases, better to the protected effect in molten bath, pernicious gas source can be eliminated; Larger shielding gas flow amount has stirring action to molten bath simultaneously, thus accelerates the speed of bubble effusion.
In filling weldering, adopt the method for laser assisted TIG filler wire welding, namely keep composite welding head constant, but reduce laser-arc spacing, reduce shielding gas flow amount, and reduce laser power to being less than 800W, now, laser does not form keyhole in welding process, welding process is played a leading role by TIG, the effect of laser is following three aspects: one. to the preheating that workpiece carries out to a certain degree, reduce the possibility that gas hole defect produces, two. when laser power reduces, bond pattern changes thermal conductance into by deep penetration welding and welds, keyhole fades away, thus the pore produced by keyhole also fades away.The air vent of craft that the pore occurred in capping layer mainly causes because keyhole is unstable; Three. because electric arc arc column is compressed, cause arc energy more concentrated.In addition due to the heat radiation effect of laser photo plasma, the surface tension coefficient of molten drop is reduced, surface tension can be made to reduce, facilitate the liquid bridge transition mode transition of molten drop.Entering of welding wire molten drop, will impact keyhole stability, and upset molten bath flowing, and it is unfavorable that the big ups and downs in molten bath and turbulent flow all cause the suppression of pore.Therefore, ensure that welding wire molten drop enters molten bath in liquid bridge transition mode, be beneficial to the suppression of gas hole defect.
Accompanying drawing explanation
Fig. 1 is laser-TIG filler wire welding schematic diagram;
Fig. 2 is the backing weld seam positive and negative shape appearance figure to the thick D406A super-high strength steel of 10mm of embodiment 1;
Fig. 3 is the backing weld seam cross section to the thick D406A super-high strength steel of 10mm of embodiment 1;
Fig. 4 is the backing weld seam sectional side elevation to the thick D406A super-high strength steel of 10mm of embodiment 1;
Fig. 5 is the backing weld seam X-ray check result figure to the thick D406A super-high strength steel of 10mm of embodiment 1;
Fig. 6 is the cap weld positive and negative shape appearance figure to the thick D406A super-high strength steel of 10mm of embodiment 1;
Fig. 7 is the cap weld cross-sectional view to the thick D406A super-high strength steel of 10mm of embodiment 1;
Fig. 8 is the cap weld sectional side elevation to the thick D406A super-high strength steel of 10mm of embodiment 1;
Fig. 9 is the cap weld X-ray check result figure to the thick D406A super-high strength steel of 10mm of embodiment 1.
Detailed description of the invention
Detailed description of the invention one: the method for thick D406A super-high strength steel laser weld pore in a kind of elimination of present embodiment, it carries out in accordance with the following steps:
Step one: before welding, according to thickness of slab, is processed into double groove by the position to be welded of workpiece to be welded, and polishes to the double groove after processing and both side surface or clean, and is fixed on welding tool setup by the workpiece to be welded after polishing or cleaning;
Step 2: utilize frock clamp laser head and TIG welding gun, wire feeder to be rigidly fixed;
Step 3: welding condition is set:
Backing welding: defocusing amount is ﹣ 3 ~ ﹢ 3mm, and laser power is 3000 ~ 5000W, and arc current is 100 ~ 400A, and laser-arc spacing is 5 ~ 6mm, and speed of welding is 50 ~ 500mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min;
Fill weldering: defocusing amount is ﹣ 3 ~ ﹢ 3mm, and laser power is 400 ~ 700W, arc current 200 ~ 400A, laser-arc spacing is 2 ~ 3mm, and speed of welding is 50 ~ 500mm/min, and protection gas adopts Ar gas, flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min;
Step 4: in actual welding process, robot integrated system is adopted to control welding condition, first TIG Arc, then after arc stability 1 ~ 2S, then laser control sends laser, and last control makes laser work head and TIG welding gun associated movement complete welding process.
Present embodiment is intended to thick high strength steel plate in welding, adopt the method for laser-TIG filler wire welding, carry out backing welding to weld two-layer welding obtain satisfactory weld seam with filling, its schematic diagram as shown in Figure 1, due to when bottoming welding is welded with filling, the type of pore is different from mechanism of production, and therefore, present embodiment is welded for bottoming welding and be have employed different pore braking measures respectively with filling.
In backing welding, in order to obtain larger fusion penetration, adopting the two thermal source composite welding of laser-TIG, mainly containing following two features compared to general laser-TIG silk filling composite welding: one. laser and TIG electric arc spacing d
l-Tthe General Requirements of 2-3mm should be greater than, increase to 5-6mm, d
l-Tincrease, the coupling of laser and electric arc can be reduced on the one hand to a certain extent, improve the stability of welding process, reduce the probability being involved in stomatal limiting value; On the other hand, it expands the area in molten bath, reduces the cooling velocity in molten bath, adds the time of liberation of pore, also can reduce prime coat pore curve; Two .TIG shielding gas flow amounts are greater than 35L/min, large shielding gas flow amount at utmost can dispel laser plasma on the one hand, reduce the loss of plasma for laser power, maximum welding penetration is obtained under equal laser power, on the other hand, this is because shielding gas flow amount increases, better to the protected effect in molten bath, pernicious gas source can be eliminated; Larger shielding gas flow amount has stirring action to molten bath simultaneously, thus accelerates the speed of bubble effusion.
In filling weldering, adopt the method for laser assisted TIG filler wire welding, namely keep composite welding head constant, but reduce laser-arc spacing, reduce shielding gas flow amount, and reduce laser power to being less than 800W, now, laser does not form keyhole in welding process, welding process is played a leading role by TIG, the effect of laser is following three aspects: one. to the preheating that workpiece carries out to a certain degree, reduce the possibility that gas hole defect produces, two. when laser power reduces, bond pattern changes thermal conductance into by deep penetration welding and welds, keyhole fades away, thus the pore produced by keyhole also fades away.The air vent of craft that the pore occurred in capping layer mainly causes because keyhole is unstable; Three. because electric arc arc column is compressed, cause arc energy more concentrated.In addition due to the heat radiation effect of laser photo plasma, the surface tension coefficient of molten drop is reduced, surface tension can be made to reduce, facilitate the liquid bridge transition mode transition of molten drop.Entering of welding wire molten drop, will impact keyhole stability, and upset molten bath flowing, and it is unfavorable that the big ups and downs in molten bath and turbulent flow all cause the suppression of pore.Therefore, ensure that welding wire molten drop enters molten bath in liquid bridge transition mode, be beneficial to the suppression of gas hole defect.
Detailed description of the invention two: present embodiment and detailed description of the invention one unlike: described double groove is two V-shaped groove, two u groove, double-Y shaped groove or is with the double-U-shaped groove of root face.Other is identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment and detailed description of the invention one unlike: laser instrument adopts CO
2gas laser, YAG solid state laser or semiconductor laser.Other is identical with detailed description of the invention one.
Detailed description of the invention four: present embodiment and detailed description of the invention one unlike: the welding condition of backing welding is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm, laser power is 3000 ~ 5000W, arc current is 200 ~ 400A, laser-arc spacing is 5 ~ 6mm, speed of welding is 100 ~ 500mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min.Other is identical with detailed description of the invention one.
Detailed description of the invention five: present embodiment and detailed description of the invention one unlike: the welding condition of backing welding is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm, laser power is 4000 ~ 5000W, arc current is 300 ~ 400A, laser-arc spacing is 5 ~ 6mm, speed of welding is 200 ~ 500mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min.Other is identical with detailed description of the invention one.
Detailed description of the invention six: present embodiment and detailed description of the invention one unlike: the welding condition of backing welding is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm, laser power is 4000W, arc current is 300A, laser-arc spacing is 5 ~ 6mm, speed of welding is 300mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min.Other is identical with detailed description of the invention one.
Detailed description of the invention seven: present embodiment and detailed description of the invention one unlike: it is as follows to fill the welding condition of welding: defocusing amount is ﹣ 3 ~ ﹢ 3mm; laser power is 500 ~ 700W; arc current 200 ~ 400A; laser-arc spacing is 2 ~ 3mm; speed of welding is 100 ~ 500mm/min; protection gas adopts Ar gas, and flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min.Other is identical with detailed description of the invention one.
Detailed description of the invention eight: present embodiment and detailed description of the invention one unlike: it is as follows to fill the welding condition of welding: defocusing amount is ﹣ 3 ~ ﹢ 3mm; laser power is 600W; arc current 350A; laser-arc spacing is 2 ~ 3mm; speed of welding is 200 ~ 500mm/min; protection gas adopts Ar gas, and flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min.Other is identical with detailed description of the invention one.
Detailed description of the invention nine: present embodiment and detailed description of the invention one unlike: it is as follows to fill the welding condition of welding: defocusing amount is ﹣ 3 ~ ﹢ 3mm; laser power is 500W; arc current 200A; laser-arc spacing is 2 ~ 3mm; speed of welding is 300 ~ 500mm/min; protection gas adopts Ar gas, and flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min.Other is identical with detailed description of the invention one.
Detailed description of the invention ten: present embodiment and detailed description of the invention one unlike: it is as follows to fill the welding condition of welding: defocusing amount is ﹣ 3 ~ ﹢ 3mm; laser power is 700W; arc current 400A; laser-arc spacing is 2 ~ 3mm; speed of welding is 400mm/min; protection gas adopts Ar gas, and flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min.Other is identical with detailed description of the invention one.
Content of the present invention is not limited only to the content of the respective embodiments described above, and the combination of one of them or several detailed description of the invention equally also can realize the object of inventing.
Beneficial effect of the present invention is verified by following examples:
Embodiment 1
The present embodiment respectively profit once welds the thick D406A super-high strength steel of 10mm to two-layer welding 10mm thick D406A super-high strength steel and employing laser-TIG silk filling complex method with the following method.Specific experiment method is as follows:
The method of the present embodiment is as follows to two-layer welding 10mm thick D406A super-high strength steel process:
Step one: before welding, according to thickness of slab, is processed into double V-groove by the position to be welded of workpiece to be welded, root face height is 5mm, root face angle is 30 °, and polishes to the groove after processing and both side surface or clean, and is fixed on welding tool setup by the workpiece to be welded after polishing or cleaning;
Step 2: utilize special fixture laser head and TIG welding gun, wire feeder to be rigidly fixed;
Step 3: welding condition is set:
Backing welding: defocusing amount is 0mm, laser power 4600W, arc current at 140A, laser-arc spacing 6mm, speed of welding 300mm/min, protection gas adopts Ar gas, flow at 40L/min, wire feed rate 2m/min;
Fill weldering: defocusing amount is 0mm, laser power 400W, arc current 300A, laser-arc spacing 2mm, speed of welding is at 300mm/min, and protection gas adopts Ar gas, flow at 25L/min, wire feed rate 4m/min;
Step 4: in actual welding process, robot integrated system is adopted to control welding condition, first MAG Arc, then after arc stability 1 ~ 2S, then laser control sends laser, and last control makes laser work head and TIG welding gun associated movement complete welding process.
Fig. 2 to Fig. 5 be respectively adopt the present embodiment carry out bottoming welding time backing weld seam positive and negative pattern, seam cross-section, weld seam sectional side elevation, X-ray check result, can find out when adopting this method to carry out backing welding, can the root face of a through welding 5mm, and welding process is stablized, smooth attractive in appearance, the uniformity of appearance of weld, without obvious gas hole defect.
Fig. 6 to Fig. 9 is respectively backing weld seam positive and negative pattern when adopting the present embodiment to carry out cover welding and seam cross-section, weld seam sectional side elevation, X-ray check result, can find out, welding process weld seam stabilizing telogenesis shape continuous uniform, gas hole defect obtains and greatly suppresses.
Embodiment 2
The present embodiment respectively profit once welds the thick D406A super-high strength steel of 10mm to two-layer welding 10mm thick D406A super-high strength steel and employing laser-TIG silk filling complex method with the following method.Specific experiment method is as follows:
The method of the present embodiment is as follows to two-layer welding 10mm thick D406A super-high strength steel process:
Step one: before welding, according to thickness of slab, is processed into double V-groove by the position to be welded of workpiece to be welded, root face height is 5mm, root face angle is 30 °, and polishes to the groove after processing and both side surface or clean, and is fixed on welding tool setup by the workpiece to be welded after polishing or cleaning;
Step 2: utilize special fixture laser head and TIG welding gun, wire feeder to be rigidly fixed;
Step 3: welding condition is set:
Backing welding: defocusing amount is 0mm, laser power 4000W, arc current at 120A, laser-arc spacing 6mm, speed of welding 270mm/min, protection gas adopts Ar gas, flow at 40L/min, wire feed rate 2m/min;
Fill weldering: defocusing amount is 0mm, laser power 380W, arc current 350A, laser-arc spacing 2mm, speed of welding is at 300mm/min, and protection gas adopts Ar gas, flow at 25L/min, wire feed rate 4m/min;
Step 4: in actual welding process, robot integrated system is adopted to control welding condition, first MAG Arc, then after arc stability 1 ~ 2S, then laser control sends laser, and last control makes laser work head and TIG welding gun associated movement complete welding process.
Embodiment 3
The present embodiment respectively profit once welds the thick D406A super-high strength steel of 10mm to two-layer welding 10mm thick D406A super-high strength steel and employing laser-TIG silk filling complex method with the following method.Specific experiment method is as follows:
The method of the present embodiment is as follows to two-layer welding 10mm thick D406A super-high strength steel process:
Step one: before welding, according to thickness of slab, is processed into double V-groove by the position to be welded of workpiece to be welded, root face height is 5mm, root face angle is 30 °, and polishes to the groove after processing and both side surface or clean, and is fixed on welding tool setup by the workpiece to be welded after polishing or cleaning;
Step 2: utilize special fixture laser head and TIG welding gun, wire feeder to be rigidly fixed;
Step 3: welding condition is set:
Backing welding: defocusing amount is 0mm, laser power 4200W, arc current at 150A, laser-arc spacing 6mm, speed of welding 320mm/min, protection gas adopts Ar gas, flow at 40L/min, wire feed rate 2m/min;
Fill weldering: defocusing amount is 0mm, laser power 350W, arc current 300A, laser-arc spacing 2mm, speed of welding is at 300mm/min, and protection gas adopts Ar gas, flow at 25L/min, wire feed rate 4m/min;
Step 4: in actual welding process, robot integrated system is adopted to control welding condition, first MAG Arc, then after arc stability 1 ~ 2S, then laser control sends laser, and last control makes laser work head and TIG welding gun associated movement complete welding process.
Embodiment 4
The present embodiment respectively profit once welds the thick D406A super-high strength steel of 10mm to two-layer welding 10mm thick D406A super-high strength steel and employing laser-TIG silk filling complex method with the following method.Specific experiment method is as follows:
The method of the present embodiment is as follows to two-layer welding 10mm thick D406A super-high strength steel process:
Step one: before welding, according to thickness of slab, is processed into double V-groove by the position to be welded of workpiece to be welded, root face height is 5mm, root face angle is 30 °, and polishes to the groove after processing and both side surface or clean, and is fixed on welding tool setup by the workpiece to be welded after polishing or cleaning;
Step 2: utilize special fixture laser head and TIG welding gun, wire feeder to be rigidly fixed;
Step 3: welding condition is set:
Backing welding: defocusing amount is 0mm, laser power 3700W, arc current at 150A, laser-arc spacing 6mm, speed of welding 360mm/min, protection gas adopts Ar gas, flow at 40L/min, wire feed rate 2m/min;
Fill weldering: defocusing amount is 0mm, laser power 330W, arc current 320A, laser-arc spacing 2mm, speed of welding is at 300mm/min, and protection gas adopts Ar gas, flow at 25L/min, wire feed rate 4m/min;
Step 4: in actual welding process, robot integrated system is adopted to control welding condition, first MAG Arc, then after arc stability 1 ~ 2S, then laser control sends laser, and last control makes laser work head and TIG welding gun associated movement complete welding process.
Claims (10)
1. a method for thick D406A super-high strength steel laser weld pore in eliminating, is characterized in that it carries out in accordance with the following steps:
Step one: before welding, according to thickness of slab, is processed into double groove by the position to be welded of workpiece to be welded, and polishes to the double groove after processing and both side surface or clean, and is fixed on welding tool setup by the workpiece to be welded after polishing or cleaning;
Step 2: utilize frock clamp laser head and TIG welding gun, wire feeder to be rigidly fixed;
Step 3: welding condition is set:
Backing welding: defocusing amount is ﹣ 3 ~ ﹢ 3mm, and laser power is 3000 ~ 5000W, and arc current is 100 ~ 400A, and laser-arc spacing is 5 ~ 6mm, and speed of welding is 50 ~ 500mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min;
Fill weldering: defocusing amount is ﹣ 3 ~ ﹢ 3mm, and laser power is 400 ~ 700W, arc current 200 ~ 400A, laser-arc spacing is 2 ~ 3mm, and speed of welding is 50 ~ 500mm/min, and protection gas adopts Ar gas, flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min;
Step 4: in actual welding process, robot integrated system is adopted to control welding condition, first TIG Arc, then after arc stability 1 ~ 2S, then laser control sends laser, and last control makes laser work head and TIG welding gun associated movement complete welding process.
2. according to claim 1 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore, it is characterized in that described double groove is two V-shaped groove, two u groove, double-Y shaped groove or the double-U-shaped groove of band root face.
3. according to claim 1 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore, it is characterized in that laser instrument adopts CO
2gas laser, YAG solid state laser or semiconductor laser.
4. according to claim 1 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore, it is characterized in that the welding condition of backing welding is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm, laser power is 3000 ~ 5000W, arc current is 200 ~ 400A, laser-arc spacing is 5 ~ 6mm, speed of welding is 100 ~ 500mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min.
5. according to claim 4 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore, it is characterized in that the welding condition of backing welding is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm, laser power is 4000 ~ 5000W, arc current is 300 ~ 400A, laser-arc spacing is 5 ~ 6mm, speed of welding is 200 ~ 500mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min.
6. according to claim 5 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore, it is characterized in that the welding condition of backing welding is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm, laser power is 4000W, arc current is 300A, laser-arc spacing is 5 ~ 6mm, speed of welding is 300mm/min, and wire feed rate is 1 ~ 2m/min; Protection gas adopts Ar gas, and flow is 30 ~ 40L/min.
7. according to claim 1 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore; it is characterized in that the welding condition of filling weldering is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm; laser power is 500 ~ 700W; arc current 200 ~ 400A; laser-arc spacing is 2 ~ 3mm, and speed of welding is 100 ~ 500mm/min, and protection gas adopts Ar gas; flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min.
8. according to claim 7 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore; it is characterized in that the welding condition of filling weldering is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm; laser power is 600W; arc current 350A; laser-arc spacing is 2 ~ 3mm, and speed of welding is 200 ~ 500mm/min, and protection gas adopts Ar gas; flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min.
9. according to claim 8 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore; it is characterized in that the welding condition of filling weldering is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm; laser power is 500W; arc current 200A; laser-arc spacing is 2 ~ 3mm, and speed of welding is 300 ~ 500mm/min, and protection gas adopts Ar gas; flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min.
10. according to claim 8 a kind of eliminate in the method for thick D406A super-high strength steel laser weld pore; it is characterized in that the welding condition of filling weldering is as follows: defocusing amount is ﹣ 3 ~ ﹢ 3mm; laser power is 700W; arc current 400A; laser-arc spacing is 2 ~ 3mm, and speed of welding is 400mm/min, and protection gas adopts Ar gas; flow is 20 ~ 30L/min, and wire feed rate is 1 ~ 2m/min.
Priority Applications (1)
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| CN105665927A (en) * | 2016-03-30 | 2016-06-15 | 内蒙古第一机械集团有限公司 | Protection method of high nitrogen austenitic stainless steel welded joint |
| CN106181043A (en) * | 2016-09-22 | 2016-12-07 | 哈尔滨工业大学 | A kind of welding method improving hybrid Laser-Arc Welding process stability |
| CN106271139A (en) * | 2016-08-25 | 2017-01-04 | 南京先进激光技术研究院 | A kind of Invar steel laser electrical arc complex welding method |
| CN106271061A (en) * | 2016-09-22 | 2017-01-04 | 哈尔滨工业大学 | A kind of unconventional cryogenic gas protection method for laser welding |
| CN107584212A (en) * | 2017-10-13 | 2018-01-16 | 山西太钢不锈钢股份有限公司 | A kind of laser silk filling butt welding Thin Specs SUS430 cold drawing methods |
| CN109332899A (en) * | 2018-10-29 | 2019-02-15 | 渤海造船厂集团有限公司 | A kind of method of pipeline narrow gap scanning galvanometer laser-heating wire TIG composite welding |
| CN110102924A (en) * | 2019-06-12 | 2019-08-09 | 中国核动力研究设计院 | A method of for controlling correction large-size box structural member fillet weld deformation |
| CN110814552A (en) * | 2019-09-27 | 2020-02-21 | 渤海造船厂集团有限公司 | Scanning galvanometer laser-high frequency pulse TIG (tungsten inert gas) hybrid welding method |
| CN111515542A (en) * | 2020-04-26 | 2020-08-11 | 长春理工大学 | Laser-arc two-heat-source weak coupling welding method for high-nitrogen steel |
| CN111872561A (en) * | 2020-06-10 | 2020-11-03 | 中国兵器科学研究院宁波分院 | Welding joint and welding method of low-alloy ultrahigh-strength steel |
| CN112846658A (en) * | 2020-12-31 | 2021-05-28 | 中核北方核燃料元件有限公司 | Method for eliminating air holes in medium-thickness steel lock bottom type welding seam |
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| CN105665927A (en) * | 2016-03-30 | 2016-06-15 | 内蒙古第一机械集团有限公司 | Protection method of high nitrogen austenitic stainless steel welded joint |
| CN106271139A (en) * | 2016-08-25 | 2017-01-04 | 南京先进激光技术研究院 | A kind of Invar steel laser electrical arc complex welding method |
| CN106181043A (en) * | 2016-09-22 | 2016-12-07 | 哈尔滨工业大学 | A kind of welding method improving hybrid Laser-Arc Welding process stability |
| CN106271061A (en) * | 2016-09-22 | 2017-01-04 | 哈尔滨工业大学 | A kind of unconventional cryogenic gas protection method for laser welding |
| CN107584212A (en) * | 2017-10-13 | 2018-01-16 | 山西太钢不锈钢股份有限公司 | A kind of laser silk filling butt welding Thin Specs SUS430 cold drawing methods |
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| CN110102924B (en) * | 2019-06-12 | 2021-10-22 | 中国核动力研究设计院 | Method for controlling and correcting fillet weld deformation of large box structural member |
| CN110102924A (en) * | 2019-06-12 | 2019-08-09 | 中国核动力研究设计院 | A method of for controlling correction large-size box structural member fillet weld deformation |
| CN110814552A (en) * | 2019-09-27 | 2020-02-21 | 渤海造船厂集团有限公司 | Scanning galvanometer laser-high frequency pulse TIG (tungsten inert gas) hybrid welding method |
| CN111515542A (en) * | 2020-04-26 | 2020-08-11 | 长春理工大学 | Laser-arc two-heat-source weak coupling welding method for high-nitrogen steel |
| CN111515542B (en) * | 2020-04-26 | 2021-12-31 | 长春理工大学 | Laser-arc two-heat-source weak coupling welding method for high-nitrogen steel |
| CN111872561A (en) * | 2020-06-10 | 2020-11-03 | 中国兵器科学研究院宁波分院 | Welding joint and welding method of low-alloy ultrahigh-strength steel |
| CN111872561B (en) * | 2020-06-10 | 2021-10-29 | 中国兵器科学研究院宁波分院 | Welding joint and welding method of low-alloy ultrahigh-strength steel |
| CN113941777A (en) * | 2020-12-10 | 2022-01-18 | 哈尔滨焊接研究院有限公司 | Thick plate ultrahigh-power laser scanning-high-frequency pulse deep melting TIG (tungsten inert gas) hybrid welding method |
| CN112846658A (en) * | 2020-12-31 | 2021-05-28 | 中核北方核燃料元件有限公司 | Method for eliminating air holes in medium-thickness steel lock bottom type welding seam |
| CN112975122A (en) * | 2021-03-04 | 2021-06-18 | 南昌航空大学 | Welding gas protection device, laser wire filling welding system and welding method |
| CN112975122B (en) * | 2021-03-04 | 2023-03-24 | 南昌航空大学 | Welding gas protection device, laser wire filling welding system and welding method |
| CN114248000A (en) * | 2021-12-23 | 2022-03-29 | 三一重机有限公司 | Welding method and system |
| CN114248000B (en) * | 2021-12-23 | 2023-09-08 | 三一重机有限公司 | Welding method and system |
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Application publication date: 20160217 |