CN113305401A - Welding device and method for alternate air supply type titanium alloy narrow gap GTAW - Google Patents
Welding device and method for alternate air supply type titanium alloy narrow gap GTAW Download PDFInfo
- Publication number
- CN113305401A CN113305401A CN202110600877.4A CN202110600877A CN113305401A CN 113305401 A CN113305401 A CN 113305401A CN 202110600877 A CN202110600877 A CN 202110600877A CN 113305401 A CN113305401 A CN 113305401A
- Authority
- CN
- China
- Prior art keywords
- welding
- gas supply
- gas
- gtaw
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 154
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims description 131
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 36
- 229910052786 argon Inorganic materials 0.000 claims description 20
- 239000001307 helium Substances 0.000 claims description 18
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 17
- 230000003993 interaction Effects 0.000 claims description 17
- 229910052734 helium Inorganic materials 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 239000010953 base metal Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 description 17
- 239000000463 material Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 230000004927 fusion Effects 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a welding device for alternative gas supply type titanium alloy narrow gap GTAW, which comprises a He gas supply assembly, an Ar gas supply assembly, a GTAW welding gun, a workpiece to be welded, a power supply, a control mechanism and a gas supply pipeline. Whole welding set easy operation, welding efficiency is high, has reduced the porosity of welding department to can adjust gas ratio and alternative frequency according to the thick and groove angle of difference board, in order to reach best welding effect, the practical function is better.
Description
Technical Field
The invention relates to the technical field of GTAW welding of titanium alloy parts, in particular to a welding device and a welding method for alternating air supply type narrow-gap GTAW of titanium alloy.
Background
Titanium and titanium alloy are widely applied in the industrial fields of ocean engineering, ship construction, petrochemical industry, aerospace, transportation, nuclear power equipment and the like due to a series of advantages of high specific strength, high-quality corrosion resistance, no magnetism and the like. The most common welding method for titanium and titanium alloys is non-Gas Tungsten Arc Welding (GTAW). For a base material with the thickness of more than or equal to 3mm, when GTAW welding is adopted, a V-shaped groove (generally 45-60 degrees) needs to be processed, and for a large-thickness structure with the thickness of more than 10-15 mm, X-shaped groove welding needs to be processed. Along with the increase of the thickness of the base metal, the filling amount of the groove is continuously increased, the welding wire consumption is increased, and the welding quality is difficult to ensure because the titanium alloy has low rigidity and is easy to cause larger welding deformation.
In order to reduce the welding wire filling amount of the medium and large thickness titanium alloy GTAW, the titanium alloy narrow gap GTAW is produced, during narrow gap GTAW welding, a narrower groove design is adopted, the groove design is usually less than or equal to 15 degrees, and in order to increase the accessibility of the root of a welding seam, a mode of lengthening a tungsten electrode is usually adopted. The narrow gap GTAW can be manually or mechanically operated, can greatly reduce the filling amount of welding materials for welding medium and heavy plates and the deformation of welded products, is valued by industry, and develops rapidly.
However, for the titanium alloy narrow gap GTAW with a large thickness or a small bevel angle, when manual welding is adopted, due to the interference of the sight line of a welding gun and the limitation of the position of the side wall of the bevel on the gun conveying posture, the mismatching of wire filling and electric arc to the heating of a molten pool can be caused, and the non-fusion defect is easily generated. As shown in fig. 1, which is a schematic diagram of a narrow gap GTAW welding process in the prior art, it can be seen that for a titanium alloy plate GTAW with a base metal thickness h of 30mm, the side wall and the edge of a molten pool are often arc edges, and the arc energy is not concentrated enough, which easily causes insufficient energy and generates an unfused defect; when an automatic GTAW narrow gap is used, the arc always preferentially points to the base material closest to the tip of the tungsten electrode due to the minimum voltage principle, the arc directivity becomes weak, and similarly, interlayer non-fusion easily occurs. This is also the reason why the narrow gap GTAW of titanium and titanium alloy is restricted in popularization and application.
Disclosure of Invention
The method aims to solve the problems that side walls and layers are not fused easily and welding quality is unstable in titanium alloy narrow-gap GTAW welding in the prior art. The invention provides a welding device and a welding method for a narrow gap GTAW (gas-alternating flux) of a titanium alloy, which aim to design a process for protecting a molten pool by argon (Ar) -helium (He) alternating gas supply by utilizing the arc pressure difference of Ar and He from the angle of welding protective gas so as to realize the active fluidity of liquid metal in the molten pool in the welding process and avoid the occurrence of an unfused phenomenon. Whole welding set easy operation, welding efficiency is high, has reduced the porosity of welding department to can adjust gas ratio and alternative frequency according to the thick and groove angle of difference board, in order to reach best welding effect, the practical function is better.
The technical scheme adopted by the invention for solving the technical problems is as follows: a welding device for alternative gas supply type titanium alloy narrow gap GTAW comprises a He gas supply assembly, an Ar gas supply assembly, a GTAW welding gun, a workpiece to be welded, a power supply, a control mechanism and a gas supply pipeline, wherein the He gas supply assembly and the Ar gas supply assembly are respectively connected with the GTAW welding gun through one section of the gas supply pipeline to provide protective gas flow for the GTAW welding gun during welding, a high-frequency valve A for regulating helium gas flow and a high-frequency valve B for regulating argon gas flow are respectively arranged on the two sections of the gas supply pipeline, the control mechanism comprises a power supply unit, an A circuit power supply circuit, a B circuit power supply circuit, an A circuit driving circuit, a B circuit driving circuit, a display module and a human-computer interaction module which are mutually and electrically connected, the power supply unit is connected with the power supply to provide power support for the whole control mechanism, and the A circuit power supply circuit and the A circuit driving circuit are both connected with the high-frequency valve A, the gas flow protection device comprises a high-frequency valve A, a B-path power supply circuit, a B-path driving circuit, a display module, a human-computer interaction module, a GTAW welding gun and a gas flow protection system, wherein the high-frequency valve A is respectively provided with power and driving signals, the B-path power supply circuit and the B-path driving circuit are connected with the high-frequency valve B and are respectively provided with the power and driving signals, the display module is used for displaying the working information of the whole control mechanism, the human-computer interaction module is used for manually controlling and inputting information, and the GTAW welding gun is also connected with a power supply and can provide Ar-He alternating gas supply type gas flow protection for welding of a workpiece to be welded through gas regulation and control of the high-frequency valve A and the high-frequency valve B under the power supply of the power supply.
Preferably, the He gas supply assembly comprises a helium tank, a pressure gauge and a gas output regulating valve, wherein the pressure gauge and the gas output regulating valve are arranged on the helium tank; the Ar gas supply assembly comprises an argon gas bottle, a pressure gauge and a gas output regulating valve, wherein the pressure gauge and the gas output regulating valve are arranged on the argon gas bottle.
An alternate air supply type titanium alloy narrow gap GTAW welding method comprises the following steps:
step one, starting a power supply, a He gas supply assembly and an Ar gas supply assembly, and placing a GTAW welding gun at a welding groove of a workpiece to be welded;
step two, when the thickness of the base metal of the workpiece to be welded at the welding groove is less than 30mm, setting the single gas supply time T of argon during the alternative Ar-He gas supply through a human-computer interaction module in a regulation control mechanismArAnd time T of single supply of heliumHeThe ratio of (A) to (B) is 3-5: 1, carrying out alternate air supply type welding on a workpiece to be welded, wherein the alternate frequency is 1-3 Hz;
step three, when the thickness of the base metal of the workpiece to be welded at the welding groove is larger than or equal to 30mm, and the width of the groove inlet is smaller than 20mm, setting the single gas supply time T of argon during the alternative Ar-He gas supply through a human-computer interaction module in a regulation control mechanismArAnd time T of single supply of heliumHeThe ratio of (A) to (B) is 0.5-2: 1, carrying out alternating air supply type welding on a workpiece to be welded, wherein the alternating frequency is 2-5 Hz;
and step four, after welding is finished, closing the power supply, the He gas supply assembly and the Ar gas supply assembly, and finishing the GTAW welding of the titanium alloy narrow gap.
Has the advantages that:
1. when the welding device and the method for the alternating gas supply type titanium alloy narrow gap GTAW are used for welding in an Ar-He alternating gas supply mode, because the Ar arc pressure is greater than He and the He arc voltage is greater than Ar, the welding process can form periodic change of the arc pressure and periodic change of the arc energy, so that liquid in a molten pool flows from the center to the periphery in an Ar gas protection stage, and the liquid in the molten pool flows from the periphery to the center in an He gas protection stage, the active fluidity of the molten pool is greatly increased, the spreadability and the wettability of liquid metal in the molten pool are further increased, and the occurrence of non-fusion defects in the traditional narrow gap welding can be effectively avoided.
2. According to the welding device and method for the alternating air supply type titanium alloy narrow gap GTAW, due to the fact that the fluidity of the molten pool is improved when alternating air supply is conducted, the welding operation difficulty is reduced, particularly the non-flat welding position is affected due to the fact that the sight line is influenced when welding is conducted, after alternating air supply is conducted, the fluidity of the molten pool is greatly improved, the welding operation difficulty is reduced, and the welding speed is also improved.
3. According to the welding device and method for the alternating gas supply type titanium alloy narrow gap GTAW, when Ar-He alternating gas supply protection welding is adopted, the molten pool flows periodically, the condition that hydrogen atoms are changed into gas to escape from the molten pool in the solidification process is greatly increased, the probability of generating gas holes is greatly reduced, and the welding quality is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art narrow gap GTAW welding process;
FIG. 2 is a schematic view of a welding apparatus according to the present invention;
FIG. 3 is a gas timing diagram of alternative Ar-He gas supply in the present invention;
FIG. 4 is a flow pattern of molten metal in a molten pool during welding using the welding apparatus of the present invention;
FIG. 5 is a photograph showing the appearance of an arc during Ar-He alternate gas supply welding in example 1;
FIG. 6 is a photograph showing the appearance of a welded joint after welding in example 1;
FIG. 7 is a photograph showing the procedure of example 2 when welding was performed and a photograph showing the appearance of a weld after welding;
FIG. 8 is a metallographic photograph of a weld after welding in example 2;
reference numerals: 1. he gas supply assembly, 2 and Ar gas supply assembly, 3 and GTAW welding gun, 4 and to-be-welded workpiece, 5 and power supply source, 6 and control mechanism, 601 and power supply unit, 602 and A path power supply circuit, 603 and B path power supply circuit, 604 and A path drive circuit, 605 and B path drive circuit, 606 and display module, 607 and man-machine interaction module, 7 and gas supply pipeline, 8 and high-frequency valve A, 9 and high-frequency valve B.
Detailed Description
The technical solution of the present invention will be further explained and explained in detail with reference to the drawings and the specific embodiments.
As shown in the figure, the welding device for the alternating gas supply type titanium alloy narrow gap GTAW comprises a He gas supply assembly 1, an Ar gas supply assembly 2, a GTAW welding gun 3, a workpiece 4 to be welded, a power supply 5, a control mechanism 6 and a gas supply pipeline 7, wherein the He gas supply assembly 1 comprises a helium tank, a pressure gauge and a gas output regulating valve which are arranged on the helium tank; the Ar gas supply assembly 2 comprises an argon gas bottle, a pressure gauge and a gas output regulating valve which are arranged on the argon gas bottle, the He gas supply assembly 1 and the Ar gas supply assembly 2 are respectively connected with a GTAW welding gun 3 through a section of gas supply pipeline 7 to provide protective gas flow for the GTAW welding gun 3 during welding, a high-frequency valve A8 for adjusting helium gas flow and a high-frequency valve B9 for adjusting argon gas flow are respectively arranged on two sections of gas supply pipelines 7, the control mechanism 6 comprises a power supply unit 601, an A-way power supply circuit 602, a B-way power supply circuit 603, an A-way driving circuit 604, a B-way driving circuit 605, a display module 606 and a man-machine interaction module 607 which are electrically connected with each other, the power supply unit 601 is connected with a power supply 5 to provide electric support for the whole control mechanism 6, the A-way power supply circuit 602 and the A-way driving circuit 604 are both connected with the high-frequency valve A8 to respectively provide electric power and driving signals for the high-frequency valve A8, the B-path power supply circuit 603 and the B-path drive circuit 605 are connected with the high-frequency valve B9 to respectively provide power and drive signals for the high-frequency valve B9, the display module 606 is used for displaying the working information of the whole control mechanism 6, the man-machine interaction module 607 is used for manually controlling and inputting information, the GTAW welding gun 3 is also connected with the power supply 5 and can provide Ar-He alternate gas supply type airflow protection for welding of the workpiece 4 to be welded through gas regulation of the high-frequency valve A8 and the high-frequency valve B9 under the power supply of the power supply 5.
An alternate air supply type titanium alloy narrow gap GTAW welding method comprises the following steps:
step one, starting a power supply 5, a He gas supply assembly 1 and an Ar gas supply assembly 2, and placing a GTAW welding gun 3 at a welding slope of a workpiece 4 to be welded;
step two, when the thickness of the base metal of the workpiece 4 to be welded at the welding groove is less than 30mm, the human-computer interaction module 607 in the control mechanism 6 is regulated and controlled to set the argon gas supply during the alternative Ar-He gas supplyTime of single air supply TArAnd time T of single supply of heliumHeThe ratio of (A) to (B) is 3-5: 1, carrying out alternate air supply type welding on a workpiece 4 to be welded, wherein the alternate frequency is 1-3 Hz;
step three, when the thickness of the base metal of the workpiece 4 to be welded at the welding groove is more than or equal to 30mm and the width of the groove inlet is less than 20mm, setting the single gas supply time T of argon during the alternative Ar-He gas supply through a human-computer interaction module 607 in the regulation control mechanism 6ArAnd time T of single supply of heliumHeThe ratio of (A) to (B) is 0.5-2: 1, carrying out alternate air supply type welding on a workpiece 4 to be welded, wherein the alternate frequency is 2-5 Hz;
and step four, after welding is finished, closing the power supply 5, the He gas supply assembly 1 and the Ar gas supply assembly 2, and finishing the GTAW welding of the titanium alloy narrow gap.
The welding device and the welding method for the alternate air supply type titanium alloy narrow gap GTAW are mainly applied to a titanium alloy narrow gap GTAW welding process, the welding material covers pure titanium and titanium alloy, the welding device is particularly suitable for narrow gap grooves with the thickness of more than or equal to 10mm, the welding line types include makeup welding lines, longitudinal welding lines, circumferential welding lines and the like, and the welding quality can be effectively improved.
As shown in FIG. 2, in the welding device of the present invention, the control mechanism is composed of a power supply unit, an A-way power supply circuit, a B-way power supply circuit, a display module, a man-machine interaction module, an A-way driving circuit and a B-way driving circuit, wherein the power supply unit is a circuit for converting common frequency electricity into electricity for the control mechanism, the A-way power supply circuit and the B-way power supply circuit respectively provide power for a high frequency valve A (V-A) and a high frequency valve B (V-B), the A-way driving circuit and the B-way driving circuit respectively provide driving signals for the high frequency valve A (V-A) and the high frequency valve B (V-B), the display module can display set parameters and working conditions, and the man-machine interaction module is responsible for parameter input and process control. The control mechanism and the gas circuit jointly form a titanium alloy alternate gas supply narrow-gap GTAW gas supply device, and the titanium alloy alternate gas supply narrow-gap GTAW gas supply process can be realized.
The welding process of the invention is different from the traditional titanium alloy narrow gap GTAW process in that Ar-He alternative gas supply is adopted for supplying the protective gas. The welding process designs different alternate gas supply frequencies and different gas proportions aiming at different thicknesses and groove forms, and has obvious effect of reducing the unmelted effect between the narrow-gap GTAW side wall and the narrow-gap GTAW layer. The overall structure diagram of the welding device is shown in fig. 2, and the welding device adopts an Ar/He double gas supply unit, and alternate gas supply parameter setting can be carried out through the welding device, so that Ar and He which are alternately supplied are output and supplied to a welding gun for use.
When the welding device works specifically, when the gases in the argon gas cylinder and the helium gas cylinder in the Ar gas supply assembly and the He gas supply assembly are sufficient, the man-machine interaction module in the control mechanism can input alternative gas supply parameters, and the protective gas time sequence shown in figure 3 can be realized through the adjustment of the high-frequency valve A and the high-frequency valve B on the gas supply pipeline, wherein the argon protection time TArAnd helium gas protection time THeAnd the alternate period T can be independently adjusted, the use is convenient, and the requirements of different working conditions can be met.
During specific welding, for a narrow gap welding seam with base metal thickness less than 30mm, shallow groove depth and certain gun movement margin, TArAnd THeThe time ratio is recommended to adopt (3-5): 1, recommending the alternating frequency to be 1-3 Hz; at the same time, the gas cost is saved, and meanwhile, the alternating frequency is lower, so that the operation is convenient; for the narrow gap welding seam with the base material thickness of more than or equal to 30mm, the groove depth is deeper, and the width of the upper end of the groove is less than 20mm, TArAnd THeThe time ratio is recommended to adopt (0.5-2): 1, recommending the alternating frequency to be 2-5 Hz; at the moment, the alternating frequency is higher, the stirring effect of the molten pool is obvious, and the defect eliminating capacity is stronger.
FIG. 4 is a flow pattern of molten metal in a molten pool during welding of the welding apparatus of the present invention, wherein the workpiece to be welded is made of a titanium alloy plate, the thickness h of a base metal is 30mm, (a) the molten pool flows from the center to the periphery in an Ar gas shield stage, and (b) the molten pool flows from the periphery to the center in an He gas shield stage. The alternating flow of the molten pool avoids the tendency to unfuse and also facilitates gas evolution.
The invention is explained in more detail below by means of two specific examples, the purpose of which is to disclose the invention with the aim of protecting all changes and modifications within the scope of the invention, which is not limited to the following examples.
Example 1
As shown in FIG. 5, in this embodiment, the thickness of the workpiece to be welded is 20mm, the material is TA2 plate, the single-side narrow gap groove is welded by flat position narrow gap welding. Setting T during weldingArAnd THeThe time ratio of (1) to (3) and the alternating frequency of 1 Hz; in fig. 5, (a) is the arc appearance of the Ar gas protection phase, in which the arc is orange and the arc profile is small, and (b) is the arc appearance of the He gas protection phase, in which the arc is white and the arc profile is large.
The appearance of the welded seam after welding is shown in figure 6, the corrugation is clear, and the appearance is uniform. Through measurement and calculation, after the welding process is adopted for welding, the welding time of a welding line with the length of 300mm is shortened from 2 minutes to 40 seconds to 2 minutes to 20 seconds, the welding efficiency is improved by 10-15%, after welding, a workpiece is detected according to NB/T47013 rays, the detection result is I grade, and defects such as unfused and air holes are not found.
Example 2
As shown in FIG. 7, in this embodiment, the thickness of the workpiece to be welded is 40mm, the material is TA2 plate, and the two sides of the workpiece are provided with narrow gap grooves, and the workpiece is welded at the transverse welding position. Setting T during weldingArAnd THeThe time ratio of (1: 1) and the alternating frequency of 5 Hz; fig. 7 (a) is a photograph showing the welding process, and (b) is an appearance of a welded test panel. The operability of the welding process is obviously improved, the fluidity of a molten pool is greatly increased, the test plate is tested according to the standard after welding, and the tensile property and the technological property both meet the relevant standards. The metallographic phase of the alloy is shown in the attached figure 8, and the radiation detection and the ultrasonic detection are carried out according to NB/T47013, so that the metallographic phase reaches the I level, and the defects of unfused fusion, pores and the like are not found.
The welding device and the welding process have the advantages that the welding device and the welding process can improve the stability of the quality of the welding process, reduce the probability of non-fusion between layers and side walls and occurrence of air holes, reduce the operation difficulty and improve the welding efficiency by about 10 percent, further expand the application range of the titanium alloy GTAW narrow gap welding, and have better practical effect.
The embodiments selected for the purpose of disclosing the invention are presently considered to be suitable, but it will be understood that the invention is intended to cover all variations and modifications of the embodiments, which fall within the spirit and scope of the present invention.
Claims (3)
1. The utility model provides an alternative air feed formula titanium alloy narrow gap GTAW uses welding set which characterized in that: the welding device comprises a He gas supply assembly (1), an Ar gas supply assembly (2), a GTAW welding gun (3), a workpiece (4) to be welded, a power supply (5), a control mechanism (6) and a gas supply pipeline (7), wherein the He gas supply assembly (1) and the Ar gas supply assembly (2) are respectively connected with the GTAW welding gun (3) through one section of gas supply pipeline (7) to provide protective gas flow for the GTAW welding gun (3) during welding, a high-frequency valve A (8) used for adjusting helium gas flow and a high-frequency valve B (9) used for adjusting argon gas flow are respectively arranged on the two sections of gas supply pipelines (7), the control mechanism (6) comprises a power supply unit (601), an A circuit power supply circuit (602), a B circuit power supply circuit (603), an A circuit driving circuit (604), a B circuit driving circuit (605), a display module (606) and a human-computer interaction module (607) which are mutually and electrically connected, the power supply unit (601) is connected with a power supply (5) to provide power support for the whole control mechanism (6), the A circuit power supply circuit (602) and the A circuit drive circuit (604) are both connected with the high-frequency valve A (8), to supply power and a drive signal to a high-frequency valve A (8), respectively, a B-way power supply circuit (603) and a B-way drive circuit (605) are connected to a high-frequency valve B (9), to respectively provide power and driving signals for the high-frequency valve B (9), a display module (606) is used for displaying the working information of the whole control mechanism (6), a man-machine interaction module (607) is used for manual control and information input, the GTAW welding gun (3) is also connected with the power supply (5) and can be powered by the power supply (5), and an Ar-He alternate gas supply type gas flow protection is provided for welding of the workpiece (4) to be welded through gas regulation of the high-frequency valve A (8) and the high-frequency valve B (9).
2. The alternate gas supply narrow gap GTAW welder of titanium alloy of claim 1, further comprising: the He gas supply assembly (1) comprises a helium tank, a pressure gauge and a gas output regulating valve, wherein the pressure gauge and the gas output regulating valve are arranged on the helium tank; ar air feed subassembly (2) include the argon gas bottle and set up manometer and the gas output governing valve on the argon gas bottle.
3. A welding method using the welding apparatus for alternating air supply type titanium alloy narrow gap GTAW of claim 1, comprising the steps of:
step one, starting a power supply (5), a He gas supply assembly (1) and an Ar gas supply assembly (2), and placing a GTAW welding gun (3) at a welding groove of a workpiece (4) to be welded;
step two, when the thickness of the base metal of the workpiece (4) to be welded at the welding groove is less than 30mm, setting the single gas supply time T of argon during the alternative Ar-He gas supply through a human-computer interaction module (607) in a regulation control mechanism (6)ArAnd time T of single supply of heliumHeThe ratio of (3-5): 1, carrying out alternate air supply type welding on a workpiece (4) to be welded, wherein the alternate frequency is 1-3 Hz;
step three, when the thickness of the base metal of the workpiece (4) to be welded at the welding groove is more than or equal to 30mm, and the width of the groove inlet is less than 20mm, setting the single gas supply time T of argon during the alternative Ar-He gas supply through a human-computer interaction module (607) in a regulation control mechanism (6)ArAnd time T of single supply of heliumHeThe ratio of (0.5-2): 1, carrying out alternate air supply type welding on a workpiece (4) to be welded, wherein the alternate frequency is 2-5 Hz;
and step four, after welding is finished, closing the power supply (5), the He gas supply assembly (1) and the Ar gas supply assembly (2), and finishing the GTAW welding of the titanium alloy narrow gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110600877.4A CN113305401B (en) | 2021-05-31 | 2021-05-31 | Welding device and method for alternate air supply type titanium alloy narrow gap GTAW |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110600877.4A CN113305401B (en) | 2021-05-31 | 2021-05-31 | Welding device and method for alternate air supply type titanium alloy narrow gap GTAW |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113305401A true CN113305401A (en) | 2021-08-27 |
| CN113305401B CN113305401B (en) | 2022-11-25 |
Family
ID=77376543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110600877.4A Active CN113305401B (en) | 2021-05-31 | 2021-05-31 | Welding device and method for alternate air supply type titanium alloy narrow gap GTAW |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113305401B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004065054A1 (en) * | 2003-01-22 | 2004-08-05 | Kr Precision Co. Ltd | Arc welder with a built-in gas alternation provision apparatus |
| CN101293303A (en) * | 2008-06-13 | 2008-10-29 | 中国船舶重工集团公司第七二五研究所 | TIG automatic welding technique for titanium alloy thick plate narrow interstice |
| US20090107959A1 (en) * | 2007-10-29 | 2009-04-30 | Gm Global Technology Operations, Inc. | Arc Welding Initiation System and Method |
| CN102601501A (en) * | 2012-02-25 | 2012-07-25 | 哈尔滨工业大学（威海） | Magnetic control TIG (Tungsten Inert Gas) welding process for narrow gap of thick plate titanium alloy |
| US20140305910A1 (en) * | 2013-03-27 | 2014-10-16 | Ipg Photonics Corporation | System and Method Utilizing Fiber Lasers for Titanium Welding Using an Argon Cover Gas |
| CN104607777A (en) * | 2015-01-21 | 2015-05-13 | 中国船舶重工集团公司第七二五研究所 | Welding shielding gas alternating gas supply system |
| CN105081529A (en) * | 2015-07-21 | 2015-11-25 | 中国船舶重工集团公司第七二五研究所 | Welding protective gas high-frequency mixing system |
| JP2020089907A (en) * | 2018-12-06 | 2020-06-11 | 国立大学法人愛媛大学 | Arc welding method and welding device |
-
2021
- 2021-05-31 CN CN202110600877.4A patent/CN113305401B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004065054A1 (en) * | 2003-01-22 | 2004-08-05 | Kr Precision Co. Ltd | Arc welder with a built-in gas alternation provision apparatus |
| US20090107959A1 (en) * | 2007-10-29 | 2009-04-30 | Gm Global Technology Operations, Inc. | Arc Welding Initiation System and Method |
| CN101422840A (en) * | 2007-10-29 | 2009-05-06 | 通用汽车环球科技运作公司 | Arc welding initiation system and method |
| CN101293303A (en) * | 2008-06-13 | 2008-10-29 | 中国船舶重工集团公司第七二五研究所 | TIG automatic welding technique for titanium alloy thick plate narrow interstice |
| CN102601501A (en) * | 2012-02-25 | 2012-07-25 | 哈尔滨工业大学（威海） | Magnetic control TIG (Tungsten Inert Gas) welding process for narrow gap of thick plate titanium alloy |
| US20140305910A1 (en) * | 2013-03-27 | 2014-10-16 | Ipg Photonics Corporation | System and Method Utilizing Fiber Lasers for Titanium Welding Using an Argon Cover Gas |
| CN104607777A (en) * | 2015-01-21 | 2015-05-13 | 中国船舶重工集团公司第七二五研究所 | Welding shielding gas alternating gas supply system |
| CN105081529A (en) * | 2015-07-21 | 2015-11-25 | 中国船舶重工集团公司第七二五研究所 | Welding protective gas high-frequency mixing system |
| JP2020089907A (en) * | 2018-12-06 | 2020-06-11 | 国立大学法人愛媛大学 | Arc welding method and welding device |
Non-Patent Citations (2)
| Title |
|---|
| 赵双喜等: "脉动送气方式及其电弧现象", 《电焊机》 * |
| 赵文光等: "钛合金交替供气GMAW焊接研究", 《材料开发与应用》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113305401B (en) | 2022-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108296610B (en) | TIG welding method for heat treatment strengthening of aluminum alloy | |
| CN103567652B (en) | Aluminum alloy direct current plasma-tungsten electrode argon arc hybrid welding method based on pulse coordination control | |
| Meng et al. | High speed TIG–MAG hybrid arc welding of mild steel plate | |
| Pardal et al. | Laser stabilization of GMAW additive manufacturing of Ti-6Al-4V components | |
| Wu et al. | Effects of single and double pulses on microstructure and mechanical properties of weld joints during high-power double-wire GMAW | |
| CN108568580B (en) | Welding equipment and process for surfacing nickel-based alloy | |
| Kang et al. | The effect of alternate supply of shielding gases in austenite stainless steel GTA welding | |
| CN107598340B (en) | Method for welding T-shaped joint of large thick plate | |
| CN105127553A (en) | Control system for lockhole effect TIG deep penetration welding welder and control method | |
| CN101590572A (en) | The vertical double-sided double-arc plasma symmetry welding method | |
| CN107538113B (en) | Welding waveform for stainless steel applications | |
| Campbell et al. | Techno-economic evaluation on the effects of alternating shielding gases for advanced joining processes | |
| CN205008717U (en) | Lockhole effect TIG deep penetration welding welding machine control system | |
| CN107127453A (en) | A kind of method for reducing laser filling wire welding austenitic stainless steel fire check | |
| JP2007021516A (en) | Narrow bevel welding method, welded structure, and welding apparatus therefor | |
| CN113305401B (en) | Welding device and method for alternate air supply type titanium alloy narrow gap GTAW | |
| JP4538394B2 (en) | Residual stress improvement welding method and welded structure | |
| Chen et al. | A novel sine wave modulation method of pulse current during double wire MIG welding | |
| CN105817750A (en) | Application of twin arc-cold wire hybrid welding method | |
| US6858813B1 (en) | Weld overlay system | |
| CN113977047A (en) | Magnetic control large-current efficient submerged arc welding system and welding method | |
| Sun et al. | Narrow gap welding for thick titanium plates: a review | |
| Pipavat et al. | Optimization of MIG welding process parameter using Taguchi techniques | |
| Singh et al. | Analysis of Hardness in Metal Inert Gas Welding of Two Dissimilar Metals, Mild Steel & Stainless Steel | |
| CN105127567A (en) | Welding method of chrome-molybdenum vanadium steel for super-thick pressure vessels |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240109 Address after: No. 169, Binhe South Road, Luolong District, Luoyang City, Henan Province Patentee after: Luoyang Shipbuilding Materials Research Institute (725th Research Institute of China Shipbuilding Corp.) Address before: No.32 Binhe North Road, high tech Zone, Luoyang City, Henan Province Patentee before: CHINA SHIPBUILDING INDUSTRY CORPORATION NO.725 Research Institute |