CN103831533A - Titanium alloy laser-MIG composite welding method - Google Patents
Titanium alloy laser-MIG composite welding method Download PDFInfo
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- CN103831533A CN103831533A CN201310653301.XA CN201310653301A CN103831533A CN 103831533 A CN103831533 A CN 103831533A CN 201310653301 A CN201310653301 A CN 201310653301A CN 103831533 A CN103831533 A CN 103831533A
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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
Abstract
The invention discloses a titanium alloy laser-MIG composite welding method. A titanium alloy connector to be welded is machined into an I-type groove, and the connector is of a butt joint type. A weld joint protection pulling cover is fixed to an MIG gun nozzle, and a pulling cover body is arranged on the upper surface of a weld joint. Vertical incidence of a laser beam is performed from the position 0-3 mm in front of the MIG, and a welding wire is sent to the upper surface of the groove through the MIG gun nozzle. After a compound heat source melts the welding wire, a connector gap is the filled, and welding forming of a workpiece single track is achieved. The titanium alloy laser-MIG composite welding method overcomes the defects that the titanium alloy weld joint welding is prone to pollution, the requirement for laser welding assembling conditions is high, the efficiency of MIG welding is low, a weld joint heat affection zone is large, and the number of air holes, cracks and the like is increased. Under the premise that the welding efficiency is not reduced, the requirement for the assembling conditions is lowered, and the titanium alloy laser-MIG composite welding method has the advantages that the welding penetration is large, the welding speed is high, the deformation of a workpiece is small, the assembly requirement is low, the bridging capacity of a melting pool is high, the welding quality is high, the performance of the weld joint is good, and automatic welding can be easily achieved.
Description
Technical field
The present invention relates to a kind of complex welding method of titanium alloy, especially a kind of titanium alloy Laser-MIG Composite Welding method, belongs to Materialbearbeitung mit Laserlicht technical field.
Background technology
Titanium or titanium alloy is because of its premium properties that has many uniquenesses, and as high in tensile strength, high temperature performance is good, corrosion-resistant and high specific strength and specific stiffness, and be widely applied at aerospace field.Along with the continuous expansion of the range of application of titanium or titanium alloy, its Welding Problems also becomes and becomes increasingly conspicuous.Laser weld as a kind of accurate, efficiently, high energy beam welding method fast, obtained application more and more widely at aerospace field.But conventional laser weld also exists some problems and defect, such as utilization ratio of laser energy is low, assembly precision requires high.In order to address these problems, laser-melting inert gas-shielded arc welding (Metal Inert Gas Welding, hereinafter to be referred as MIG) welding technology is subject to extensive concern.Laser-MIG hybrid welding is that the advantage of Laser Welding and MIG weldering is organically combined.Improve utilization ratio of laser energy, improved the stability of welding process, improved weldquality, reduced the requirement to weldment assembly precision.Made up that the weldering speed that MIG weldering exists is slow, efficiency is low, be out of shape the deficiencies such as large simultaneously.
Titanium alloy, in Laser-MIG Composite Welding process, because titanium alloy chemistry activity is very high, adds that the fast high-temperature area area of Laser-MIG Composite Welding speed is larger, and welding high-temperature area is very easily subject to the pollution of surrounding environment.At present about technical study and the application of ray laser-MIG composite welding titanium alloy are also rare.
Summary of the invention
For the deficiencies in the prior art, the invention discloses a kind of titanium alloy Laser-MIG Composite Welding method, be intended to not increase under the condition of laser power, improve welding penetration, improve welding quality, realize Laser-MIG Composite Welding titanium alloy, obtain good welds performance.
The present invention adopts following technical scheme:
A kind of titanium alloy Laser-MIG Composite Welding method, the method comprises:
The first step: titanium alloy joint to be welded is processed into I type groove, joint form is docking;
Second step: drag cover to be fixed on MIG rifle weld seam protection, drag cover main body to arrange table in welded joints;
The 3rd step: arrange laser and MIG composite heat power supply, laser beam is from MIG rifle mouth front 0～3mm vertical incidence, and welding wire is sent into groove upper surface by MIG rifle mouth;
The 4th step: use laser beam and MIG composite heat power supply, fill play movement after composite heat power supply filler wire, realize workpiece single track welding fabrication.
In the first step, the maximal clearance of I type groove joint is not more than 0.2 times of joint thickness.The maximum fusion penetration of laser-MIG composite single layer weldering carries out anticipation by 2mm/kW.
In welding process, laser output power 1.2～3.2Kw, MIG output current 35～65A; Speed of welding 600～1200mm/min; Wire feed rate 75～125ipm; Laser defocusing amount is 0～2mm; Can weld titanium alloy thickness is 2～6mm.
Adopt back of the body protection gas, MIG rifle gas and drag cover gas mating protection, wherein: carry on the back protection gas 2～5L/min, MIG rifle gas 10～18L/min, drag cover gas 12～25L/min; Using purity is that 99.99% argon gas is as protective gas.
Technical scheme of the present invention is in order to improve welding penetration, and the advantage of the technology such as Laser Welding and MIG weldering is organically combined, and is applied in the welding of titanium alloy.The bright advantage of we is: take full advantage of the dark molten characteristic of laser and the high charging efficiency feature of MIG weldering, and under the interaction of laser-MIG, welding process improved stability, welding efficiency improves.Solve that titanium alloy welded seam vulnerable to pollution, the requirement of Laser Welding assembled condition are high, MIG weldering efficiency is low, weld heat-affected zone is large, the shortcoming that pore, crackle etc. increases; Do not reducing under the prerequisite of welding efficiency, reducing assembled condition requirement.Have welding penetration large, speed of welding is fast, workpiece deformation is little, and matching requirements are low, molten bath bridging ability is strong, and welding quality is high, and Weld Performance is good, is easy to realize the features such as automatic welding.
Accompanying drawing explanation
Fig. 1 I type banjo fixing butt jointing schematic diagram;
Fig. 2 titanium alloy Laser-MIG Composite Welding schematic diagram.
In figure: δ is joint thickness; 1-workpiece; 2-laser; 3-welding wire and protection gas; 4-MIG welding gun; 5-drags cover; 6-drags cover protection gas interface; 7-weld seam.
The specific embodiment
Below, by reference to the accompanying drawings and specific embodiment, the specific embodiment of invention is further described.
Operation principle: a kind of titanium alloy Laser-MIG Composite Welding of the present invention method, by Laser Welding and MIG weldering combination are applied in the welding of titanium alloy, when welding, the design of different technical parameters reaches specific object: it is large that realization has welding penetration, speed of welding is fast, workpiece deformation is little, matching requirements are low, molten bath bridging ability is strong, welding quality is high, the titanium alloy welding that Weld Performance is good.
Welding method of the present invention, first treats titanium alloy that the joint of weldment is processed into I type groove, in order to control weld defect, when welding, fit-up gap be there are certain requirements, and therefore joint assembling must meet the requirement that gap is not more than 0.2 δ (δ is joint thickness).Become component selections welding wire according to titanium alloy material to be welded, and butt-welding fitting and welding wire carry out the pre-welding treatment such as oil removing, pickling, oven dry; Drag cover to be fixed on MIG rifle mouth weld seam protection, drag cover main body to arrange table in welded joints; Arrange laser and MIG composite heat power supply, when welding, laser beam, from MIG front 0～3mm vertical incidence, is guaranteed 1 common molten bath of the common formation of two thermals source, and welding wire is sent into molten bath upper surface by MIG rifle mouth, forms short circuiting transfer; After composite heat power supply filler wire, fill play movement, realize workpiece single track welding fabrication.Use high-power laser beam and low power MIG compound, laser power 1.2～3.2Kw, MIG electric current 35～60A, speed of welding 600～1200mm/min, wire feed rate 75～125ipm, laser defocusing amount is 0～2mm; Use purity be 99.99% argon gas as protective gas, adopt the back of the body protection gas, MIG rifle gas and drag cover gas mating protection, wherein: back of the body protection gas 2～5L/min, MIG rifle gas 10～18L/min, drag cover gas 12～25L/min.
According to material thickness difference, welding design parameter is chosen with reference to table 1.
Table 1 TA12 titanium alloy Laser-MIG Composite Welding technological specification
Specific embodiment
Laser instrument used is the HL4006D type Nd:YAG solid state laser that German TRUMFP company produces, rated power 4kW, and output wavelength is the continuous wave laser of 1.06 μ m, adopts the condenser lens that focal length is 200mm; MIG soldering equipment adopts U.S. LINCOLN Power Wave455M power supply and German Binzel APDMF II wire-feed motor.
1) the thick butt plates welding of TA12 titanium alloy material 6mm
Welding conditions are as follows: slope type is I type; Welding wire is the pure titanium welding wire of diameter 1.6mm; Chevilled silk spacing 2mm, laser is front; YAG laser power 3.2kW, speed of welding 1000mm/min, defocusing amount is 0, MIG electric current 60A, the high-purity argon gas that protective gas is 99.99%, the initial period YAG 0.8s that holds time, the MIG 1s that holds time; Back of the body protection gas is 5L/min, MIG rifle gas 18L/min, drags and cover gas 25L/min.
The titanium alloy plate butt weld that utilizes above-mentioned Laser-MIG Composite Welding method to obtain; be shaped good; ripple is even; gas shield is good, and weld contour has typical laser-MIG hybrid welding seam feature, and fusion penetration can reach 6mm; the defects such as the inner flawless of weld seam, lack of penetration and incomplete fusion; without visible field trash, the defective form of existence is mainly linear porosity, and pore is directly less than 0.5mm.Strength of joint coefficient reaches 0.93.
2) the thick butt plates welding of TA12 titanium alloy material 3mm
Welding conditions are as follows: slope type is I type; Welding wire is the pure titanium welding wire of diameter 1.6mm; Chevilled silk spacing 2mm, laser is front; YAG laser power 1.6kW, speed of welding 1000mm/min, defocusing amount is 0, MIG electric current 50A, the high-purity argon gas that protective gas is 99.99%, the initial period YAG 0.8s that holds time, the MIG 1s that holds time; Back of the body protection gas is 3L/min, MIG rifle gas 15L/min, drags and cover gas 20L/min.
The titanium alloy plate butt weld that utilizes above-mentioned Laser-MIG Composite Welding method to obtain; be shaped good; ripple is even; gas shield is good; weld contour has typical laser-MIG hybrid welding seam feature; fusion penetration can reach 3mm, and the defects such as the inner flawless of weld seam, lack of penetration and incomplete fusion, without visible field trash.Strength of joint coefficient reaches 0.96.
3) the thick butt plates welding of TA12 titanium alloy material 2mm
Welding conditions are as follows: slope type is I type; Welding wire is the pure titanium welding wire of diameter 1.6mm; Chevilled silk spacing 2mm, laser is front; YAG laser power 1.2kW, speed of welding 1000mm/min, defocusing amount is 0, MIG electric current 45A, the high-purity argon gas that protective gas is 99.99%, the initial period YAG 0.8s that holds time, the MIG 1s that holds time; Back of the body protection gas is 2L/min, MIG rifle gas 12L/min, drags and cover gas 16L/min.
The titanium alloy plate butt weld that utilizes above-mentioned Laser-MIG Composite Welding method to obtain; be shaped good; ripple is even; gas shield is good; weld contour has typical laser-MIG hybrid welding seam feature; fusion penetration can reach 2mm, and the defects such as the inner flawless of weld seam, lack of penetration and incomplete fusion, without visible field trash.Strength of joint coefficient reaches 0.95.
4) the thick butt plates welding of TC1 titanium alloy material 6mm
Welding conditions are as follows: slope type is I type; Welding wire is the pure titanium welding wire of diameter 1.6mm; Chevilled silk spacing 2mm, laser is front; YAG laser power 3.2kW, speed of welding 1000mm/min, defocusing amount is 0, MIG electric current 60A, the high-purity argon gas that protective gas is 99.99%, the initial period YAG 0.8s that holds time, the MIG 1s that holds time; Back of the body protection gas is 5L/min, MIG rifle gas 18L/min, drags and cover gas 25L/min.
The titanium alloy plate butt weld that utilizes above-mentioned Laser-MIG Composite Welding method to obtain; be shaped good; ripple is even; gas shield is good, and weld contour has typical laser-MIG hybrid welding seam feature, and fusion penetration can reach 6mm; the defects such as the inner flawless of weld seam, lack of penetration and incomplete fusion; without visible field trash, the defective form of existence is mainly linear porosity, and pore is directly less than 0.5mm.Strength of joint coefficient reaches 0.93.
5) the thick butt plates welding of TC4 titanium alloy material 3mm
Welding conditions are as follows: slope type is I type; Welding wire is the pure titanium welding wire of diameter 1.6mm; Chevilled silk spacing 2mm, laser is front; YAG laser power 1.6kW, speed of welding 1000mm/min, defocusing amount is 0, MIG electric current 50A, the high-purity argon gas that protective gas is 99.99%, the initial period YAG 0.8s that holds time, the MIG 1s that holds time; Back of the body protection gas is 3L/min, MIG rifle gas 15L/min, drags and cover gas 20L/min.
The titanium alloy plate butt weld that utilizes above-mentioned Laser-MIG Composite Welding method to obtain; be shaped good; ripple is even; gas shield is good; weld contour has typical laser-MIG hybrid welding seam feature; fusion penetration can reach 3mm, and the defects such as the inner flawless of weld seam, lack of penetration and incomplete fusion, without visible field trash.Strength of joint coefficient reaches 0.96.
6) the thick butt plates welding of TA15 titanium alloy material 2mm
Welding conditions are as follows: slope type is I type; Welding wire is the pure titanium welding wire of diameter 1.6mm; Chevilled silk spacing 2mm, laser is front; YAG laser power 1.2kW, speed of welding 1000mm/min, defocusing amount is 0, MIG electric current 45A, the high-purity argon gas that protective gas is 99.99%, the initial period YAG 0.8s that holds time, the MIG 1s that holds time; Back of the body protection gas is 2L/min, MIG rifle gas 12L/min, drags and cover gas 16L/min.
The titanium alloy plate butt weld that utilizes above-mentioned Laser-MIG Composite Welding method to obtain; be shaped good; ripple is even; gas shield is good; weld contour has typical laser-MIG hybrid welding seam feature; fusion penetration can reach 2mm, and the defects such as the inner flawless of weld seam, lack of penetration and incomplete fusion, without visible field trash.Strength of joint coefficient reaches 0.95.
The foregoing is only better possible embodiments of the present invention, not thereby limit to the scope of the claims of the present invention, therefore the equivalent structure that every utilization description of the present invention and accompanying drawing content are done changes, be all contained in protection scope of the present invention.
Claims (5)
1. a titanium alloy Laser-MIG Composite Welding method, comprising:
The first step: titanium alloy joint to be welded is processed into I type groove, joint form is docking;
Second step: drag cover to be fixed on MIG rifle weld seam protection, drag cover main body to arrange table in welded joints;
The 3rd step: arrange laser and MIG composite heat power supply, laser beam is from MIG rifle mouth front 0～3mm vertical incidence, and welding wire is sent into groove upper surface by MIG rifle mouth;
The 4th step: use laser beam and MIG composite heat power supply, fill play movement after composite heat power supply filler wire, realize workpiece single track welding fabrication.
2. titanium alloy Laser-MIG Composite Welding method according to claim 1, is characterized in that, in the first step, the maximal clearance of I type groove joint is not more than 0.2 times of joint thickness.
3. titanium alloy Laser-MIG Composite Welding method according to claim 1, is characterized in that, the maximum fusion penetration of laser-MIG composite single layer weldering carries out anticipation by 2mm/kW.
4. titanium alloy Laser-MIG Composite Welding method according to claim 1, is characterized in that, in welding process, and laser output power 1.2～3.2Kw, MIG output current 35～65A; Speed of welding 600～1200mm/min; Wire feed rate 75～125ipm; Laser defocusing amount is 0～2mm.
5. titanium alloy Laser-MIG Composite Welding method according to claim 1, is characterized in that, adopts back of the body protection gas, MIG rifle gas and drags cover gas mating protection, wherein: back of the body protection gas 2～5L/min, MIG rifle gas 10～18L/min, drag cover gas 12～25L/min.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105108333A (en) * | 2015-08-31 | 2015-12-02 | 广州有色金属研究院 | Gas protection method used for laser-arc composite welding |
| CN106553012A (en) * | 2016-12-06 | 2017-04-05 | 南京宝色股份公司 | For titanium alloy laser MIG Combined Welding postwelding protective covers and welding method |
| CN108608115A (en) * | 2018-05-10 | 2018-10-02 | 上海交通大学 | A kind of method for laser welding for increasing welding penetration and improving appearance of weld |
| CN113210869A (en) * | 2021-04-25 | 2021-08-06 | 江苏通宇钢管集团有限公司 | Efficient titanium alloy laser-electric arc composite heat source pipeline welding process |
| CN114289874A (en) * | 2022-01-19 | 2022-04-08 | 苏州大学 | Preparation method of high-strength weld joint |
| CN114310000A (en) * | 2021-12-31 | 2022-04-12 | 江苏格兰环境科技有限公司 | Composite welding type vinylidene fluoride cracking furnace tube and welding method thereof |
| CN114309952A (en) * | 2021-11-19 | 2022-04-12 | 成都先进金属材料产业技术研究院股份有限公司 | laser-Mig arc hybrid welding process method for (alpha + beta) type titanium alloy plate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105108333A (en) * | 2015-08-31 | 2015-12-02 | 广州有色金属研究院 | Gas protection method used for laser-arc composite welding |
| CN106553012A (en) * | 2016-12-06 | 2017-04-05 | 南京宝色股份公司 | For titanium alloy laser MIG Combined Welding postwelding protective covers and welding method |
| CN108608115A (en) * | 2018-05-10 | 2018-10-02 | 上海交通大学 | A kind of method for laser welding for increasing welding penetration and improving appearance of weld |
| CN113210869A (en) * | 2021-04-25 | 2021-08-06 | 江苏通宇钢管集团有限公司 | Efficient titanium alloy laser-electric arc composite heat source pipeline welding process |
| CN114309952A (en) * | 2021-11-19 | 2022-04-12 | 成都先进金属材料产业技术研究院股份有限公司 | laser-Mig arc hybrid welding process method for (alpha + beta) type titanium alloy plate |
| CN114310000A (en) * | 2021-12-31 | 2022-04-12 | 江苏格兰环境科技有限公司 | Composite welding type vinylidene fluoride cracking furnace tube and welding method thereof |
| CN114289874A (en) * | 2022-01-19 | 2022-04-08 | 苏州大学 | Preparation method of high-strength weld joint |
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Application publication date: 20140604 |