CN102248313A - Ultrasonic composite electric resistance welding method for TC4 and 718 steel - Google Patents
Ultrasonic composite electric resistance welding method for TC4 and 718 steel Download PDFInfo
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- CN102248313A CN102248313A CN2011101666919A CN201110166691A CN102248313A CN 102248313 A CN102248313 A CN 102248313A CN 2011101666919 A CN2011101666919 A CN 2011101666919A CN 201110166691 A CN201110166691 A CN 201110166691A CN 102248313 A CN102248313 A CN 102248313A
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Abstract
The invention discloses an ultrasonic composite electric resistance welding method for TC4 and 718 steel. The ultrasonic composite electric resistance welding method for the TC4 and 718 steel particularly comprises the following steps of: 1) positioning the central part of a lap joint region of a TC4 titanium alloy plate, a metal intermediate transition layer and a 718 steel plate which are required to be welded on the axis of an upper electrode and a lower electrode of a three-phase direct current resistance welding machine; 2) intervening ultrasonic wave and pressurizing; and 3) performing welding operation, namely setting working parameters of an ultrasonic generator and the three-phase direct current resistance welding machine, applying welding pressure on the upper electrode, supplying power for the three-phase direct current resistance welding machine and the ultrasonic generator, switching on a circuit switch of the three-phase direct current resistance welding machine, starting to perform ultrasonic composite resistance welding on the TC4 titanium alloy plate and the 718 steel plate, and finishing the step after the set time is up. By the method, the problems of reduced joint performance and welding joint inclusion caused by intermetallic compounds which cannot be solved in the prior art are solved.
Description
Technical field
The invention belongs to technical field of material, relate to a kind of ultrasonic wave combined resistance welder, the invention still further relates to and utilize this device to be used for the ultrasonic wave combined resistance soldering method of TC4 and 718 steel.
Background technology
Titanium and alloy ratio intensity height thereof, corrosion resisting property is good, is important aerospace structural material and chemical materials.But higher because of the titanium price, titanium commonly used-steel dissimilar metal structure both can satisfy the serviceability requirement on the engineering, had saved the titanium material again.The key of making titanium-steel composites structure is the Welding Problems that solves titanium and steel.
The physical property of titanium and steel and crystal chemistry performance all differ bigger, easily in weld seam, form compound and carbide between multiple brittle metal during welding, add that there are bigger internal stress in titanium and steel joint greatly because of thermal coefficient of expansion differs, cause joint very easily to ftracture.For this reason, often avoid the melting welding of titanium and steel in the engineering, and adopt pressure welding and method for welding.Even in solid-state welding down,, also can near faying face, form the thin layer of an intermetallic compound and carbide, very easily cause the joint brittle failure owing to the phase counterdiffusion and the migration of mother metal constituent element.
At present, titanium or titanium alloy mainly comprises explosive welding (EW), friction welding (FW), diffusion welding (DW), soldering etc. with being connected of steel.But also often because of the existence of intermetallic compound phase makes the joint performance reduction, especially weld defect has increased the weight of the uncertainty of welding quality.
Summary of the invention
The ultrasonic wave combined resistance soldering method that the purpose of this invention is to provide a kind of TC4 of being used for and 718 steel has solved that joint performance that intermetallic compound that prior art can't go beyond causes reduces and welding point such as is mingled with at problem.
The technical solution adopted in the present invention is; A kind of ultrasonic wave combined resistance soldering method for TC4 and 718 steel; Utilize a kind of ultrasonic wave combined resistance welder; The structure of this device is; Comprise supersonic generator; Supersonic generator is connected with driven rod by electroacoustic transducer; Driven rod is connected with vibration head; The upper end of vibration head is provided with pressurizing block; The lower end of vibration head is connected with the top electrode of three-phase dc resistance welder; The below of top electrode is arranged at intervals with the bottom electrode of three-phase dc resistance welder
Rely on said apparatus, this method is specifically implemented according to following steps:
The vibration head of supersonic generator is fixed on the top electrode of three-phase dc resistance welder, pressurizing block is installed above vibration head;
Step 3, carry out welding operation:
3.1) set the running parameter of supersonic generator and three-phase dc resistance welder;
3.2) apply welding pressure to top electrode;
3.3) give the power supply of three-phase dc resistance welder and supersonic generator earlier, the contactor of the three-phase dc resistance welder that closes then begins to carry out the ultrasonic wave combined resistance welding of TC4 titanium alloy sheet and 718 steel plates;
3.4) arriving setting-up time, supersonic generator and three-phase dc resistance welder cut off the power supply automatically, and welding process finishes.
Apparatus of the present invention and method, electric resistance welding method is combined with ultrasonic vibration, not only can be by hyperacoustic " ultrasonic cavitation " and elastic vibration effect, utilize mechanical shock wave to destroy, but also can produce instantaneous high temperature, reduce the electric resistance welding energy greatly by the oxide-film of weldering metal and intermediate layer alloy surface, reduce the heating degree of weld metal, shorten weld interval, suppress the generation of intermetallic compound, improve property of welded joint.Simultaneously, add between two quilt weldering sheet materials and put the metal intermediate layer, change the contact resistance state of weld interface, realize the welding of TC4 titanium alloy and 718 steel, the thermal embrittlement phenomenon that is subjected to of weldment obviously reduces.
Description of drawings
Fig. 1 is the structural representation of the ultrasonic wave combined resistance welder of the inventive method use.
Among the figure, 1.TC4 titanium alloy sheet, 2.718 steel plates, 3. top electrode, 4. bottom electrode, 5. vibration head, 6. pressurizing block, 7. driven rod, 8. electroacoustic transducer, 9. supersonic generator, 10. insulating barrier, 11. metal intermediate layers.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
As Fig. 1, the structure of the ultrasonic wave combined resistance welder that the inventive method is used is, comprise supersonic generator 9, supersonic generator 9 is connected with driven rod 7 by electroacoustic transducer 8, driven rod 7 is connected with vibration head 5 (applicator), the upper end of vibration head 5 is provided with pressurizing block 6, the lower end of vibration head 5 is provided with insulating barrier 10, the lower end of insulating barrier 10 is connected with the top electrode 3 of three-phase dc resistance welder, the below of top electrode 3 is arranged at intervals with the bottom electrode 4 of three-phase dc resistance welder, be used to place the TC4 titanium alloy sheet 1 and 718 steel plates 2 of needs welding between top electrode 3 and the bottom electrode 4, the pad place of TC4 titanium alloy sheet 1 and 718 steel plates 2 is a metal intermediate layer 11, is the position that top electrode 3 and bottom electrode 4 carry out the welding of ultrasonic wave auxiliary energy storage jointly.
The ultrasonic wave combined resistance soldering method that is used for TC4 and 718 steel of the present invention, use above-mentioned welder, to welding TC4 titanium alloy sheet and the welding of 718 steel plates, obtained more satisfactory welding point, hyperacoustic importing and the control of electric resistance welding energy are two key links.
Hyperacoustic lead-in mode is, the vibration head 5 of supersonic generator 9 is fixed on the top electrode 3 of three-phase dc resistance welder, vibration head 5 tops directly link to each other with pneumatic fitting (pressurizing block) 6, vibration by top electrode 3 imports the weld zone with ultrasonic wave, and TC4 titanium alloy sheet and 718 steel plates are carried out spot welding.
The ultrasonic wave combined resistance soldering method that is used for TC4 and 718 steel of the present invention utilizes said apparatus, specifically implements according to following steps:
The vibration head 5 of supersonic generator 9 is fixed on the top electrode 3 of three-phase dc resistance welder, pressurizing block 6 (or pneumatic fitting) is installed above vibration head 5;
Step 3, carry out welding operation:
3.1) set the running parameter of supersonic generator 9 and three-phase dc resistance welder, the parameter of supersonic generator 9 is set to: power P=80W, resonant frequency f=80-100kHz, amplitude A=0.1-5.0 μ m, duration t=30-120s;
The parameter of three-phase dc resistance welder is set to: power W=120KW, welding current I=8-20KA, welding pressure F=5-15KN, conduction time t=100-200s;
3.2) apply welding pressure for top electrode 3;
3.3) give three-phase dc resistance welder and supersonic generator 9 power supplies earlier, the contactor of the three-phase dc resistance welder that closes then begins to carry out the ultrasonic wave combined resistance welding of TC4 titanium alloy sheet and 718 steel plates;
3.4) arriving setting-up time, supersonic generator 9 and three-phase dc resistance welder cut off the power supply automatically, and welding process finishes.
The running parameter of supersonic generator 9: power P=80W is set, resonant frequency f=80kHz, amplitude A=0.1-5.0 μ m, duration t=120s; Three-phase dc resistance welder running parameter is set: power W=120KW, welding current I=18KA, welding pressure F=10KN, conduction time t=120s.Make intermediate layer by the V/Ni bimetallic of placing the about 40-60 μ of thickness m between two weldments, realized the welding of TC4 titanium alloy sheet and 718 steel plates of thickness 2.0mm, the shear strength of joint reaches 381MPa.
The running parameter of supersonic generator 9: power P=80W is set, resonant frequency f=100kHz, amplitude A=0.1-5.0 μ m, duration t=60s; Three-phase dc resistance welder running parameter is set: power W=120KW, welding current I=10KA, welding pressure F=15KN, conduction time t=180s.Make intermediate layer by the V/Ni bimetallic of placing the about 40-60 μ of thickness m between two weldments, realized that thickness is the welding of 3Cr2NiMo steel and the Ti-6Al-4V titanium alloy of 2.0mm, the shear strength of jointing reaches 413MPa.
Embodiment 3
The running parameter of supersonic generator 9: power P=80W is set, resonant frequency f=90kHz, amplitude A=0.1-5.0 μ m, duration t=40s; Three-phase dc resistance welder running parameter is set: power W=120KW, welding current I=8KA, welding pressure F=14KN, conduction time t=200s.Make intermediate layer by the V/Ni bimetallic of placing the about 40-60 μ of thickness m between two weldments, realized the welding of TC4 titanium alloy sheet and 718 steel plates of thickness 1.5mm, the shear strength of joint reaches 403MPa.
The running parameter of supersonic generator 9: power P=80W is set, resonant frequency f=100kHz, amplitude A=0.1-5.0 μ m, duration t=120s; Three-phase dc resistance welder running parameter is set: power W=120KW, welding current I=9KA, welding pressure F=7KN, conduction time t=120s.Make intermediate layer by the V/Ni bimetallic of placing the about 40-60 μ of thickness m between two weldments, realized that thickness is the welding of 3Cr2NiMo steel and the Ti-6Al-4V titanium alloy of 1.0mm, the shear strength of jointing reaches 397MPa.
The running parameter of supersonic generator 9: power P=80W is set, resonant frequency f=100kHz, amplitude A=0.1-5.0 μ m, duration t=120s; Three-phase dc resistance welder running parameter is set: power W=120KW, welding current I=8KA, welding pressure F=5KN, conduction time t=150s.Make intermediate layer by the V/Ni bimetallic of placing the about 40-60 μ of thickness m between two weldments, realized that thickness is the welding of 3Cr2NiMo steel and the Ti-6Al-4V titanium alloy of 0.5mm, the shear strength of jointing reaches 422MPa.
Claims (3)
1. ultrasonic wave combined resistance soldering method that is used for TC4 and 718 steel, its characteristics are: utilize a kind of ultrasonic wave combined resistance welder,
The structure of this device is, comprise supersonic generator (9), supersonic generator (9) is connected with driven rod (7) by electroacoustic transducer (8), driven rod (7) is connected with vibration head (5), the upper end of vibration head (5) is provided with pressurizing block (6), the lower end of vibration head (5) is connected with the top electrode (3) of three-phase dc resistance welder, and the below of top electrode (3) is arranged at intervals with the bottom electrode (4) of three-phase dc resistance welder
Rely on said apparatus, this method is specifically implemented according to following steps:
Step 1, TC4 titanium alloy sheet (1), metal intermediate layer (11) and 718 steel plates (2) that will need to weld clean with acetone, then the welding position is overlapped assembling, make the centre, overlap joint zone of TC4 titanium alloy sheet (1), metal intermediate layer (11) and 718 steel plates (2) be positioned on the axis of the top electrode (3) of three-phase dc resistance welder and bottom electrode (4);
Step 2, ultrasonic wave are got involved and pressurization:
The vibration head (5) of supersonic generator (9) is fixed on the top electrode (3) of three-phase dc resistance welder, pressurizing block (6) is installed in the top of vibration head (5);
Step 3, carry out welding operation:
3.1) set the running parameter of supersonic generator (9) and three-phase dc resistance welder;
3.2) apply welding pressure for top electrode (3);
3.3) give the power supply of three-phase dc resistance welder and supersonic generator (9) earlier, the contactor of the three-phase dc resistance welder that closes then begins to carry out the ultrasonic wave combined resistance welding of TC4 titanium alloy sheet (1) and 718 steel plates (2);
3.4) arriving setting-up time, supersonic generator (9) and three-phase dc resistance welder cut off the power supply automatically, and welding process finishes.
2. ultrasonic wave combined resistance soldering method according to claim 1, its characteristics are that the parameter that is provided with of described supersonic generator (9) is: power P=80W, resonant frequency f=80-100kHz, amplitude A=0.1-5.0 μ m, duration t=30-120s.
3. ultrasonic wave combined resistance soldering method according to claim 1, its characteristics are that the important technological parameters of described three-phase dc resistance welder is: power W=120KW, welding current I=8-20KA, welding pressure F=5-15KN, conduction time t=100-200s.
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| CN2011101666919A CN102248313A (en) | 2011-06-21 | 2011-06-21 | Ultrasonic composite electric resistance welding method for TC4 and 718 steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728960A (en) * | 2016-04-14 | 2016-07-06 | 深圳大学 | Electric resistance welding and ultrasonic composite molding device and molding method |
| CN107803631A (en) * | 2017-10-31 | 2018-03-16 | 成都先进金属材料产业技术研究院有限公司 | A kind of manufacture method of titanium steel compound bar |
| CN110125510A (en) * | 2019-05-16 | 2019-08-16 | 哈尔滨瀚霖科技开发有限公司 | It is used to prepare the resistance brazing connection method of long size hard alloy |
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| DE4444461A1 (en) * | 1994-11-29 | 1996-05-30 | Siebert Martin | Combined ultrasonic and resistance pressure welding |
| CN1686659A (en) * | 2005-04-29 | 2005-10-26 | 哈尔滨工业大学 | Aluminium base composite material ultra sonic electrical resistance welding method |
| US20060208033A1 (en) * | 2005-03-21 | 2006-09-21 | Welter Curtis L | Apparatus and method for connecting coated wires |
| CN101829824A (en) * | 2010-04-12 | 2010-09-15 | 广州电器科学研究院 | Compound heating soldering method of precise part resistance heat and supersonic vibration |
| CN101966624A (en) * | 2010-09-10 | 2011-02-09 | 华南理工大学 | Welding method based on precise combination of ultrasonic energy and resistance heat and device thereof |
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2011
- 2011-06-21 CN CN2011101666919A patent/CN102248313A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4444461A1 (en) * | 1994-11-29 | 1996-05-30 | Siebert Martin | Combined ultrasonic and resistance pressure welding |
| US20060208033A1 (en) * | 2005-03-21 | 2006-09-21 | Welter Curtis L | Apparatus and method for connecting coated wires |
| CN1686659A (en) * | 2005-04-29 | 2005-10-26 | 哈尔滨工业大学 | Aluminium base composite material ultra sonic electrical resistance welding method |
| CN101829824A (en) * | 2010-04-12 | 2010-09-15 | 广州电器科学研究院 | Compound heating soldering method of precise part resistance heat and supersonic vibration |
| CN101966624A (en) * | 2010-09-10 | 2011-02-09 | 华南理工大学 | Welding method based on precise combination of ultrasonic energy and resistance heat and device thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105728960A (en) * | 2016-04-14 | 2016-07-06 | 深圳大学 | Electric resistance welding and ultrasonic composite molding device and molding method |
| CN107803631A (en) * | 2017-10-31 | 2018-03-16 | 成都先进金属材料产业技术研究院有限公司 | A kind of manufacture method of titanium steel compound bar |
| CN110125510A (en) * | 2019-05-16 | 2019-08-16 | 哈尔滨瀚霖科技开发有限公司 | It is used to prepare the resistance brazing connection method of long size hard alloy |
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Application publication date: 20111123 |