CN109202258A - A method of increasing aluminium alloy CMT and welds crystal boundary - Google Patents
A method of increasing aluminium alloy CMT and welds crystal boundary Download PDFInfo
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- CN109202258A CN109202258A CN201710539305.3A CN201710539305A CN109202258A CN 109202258 A CN109202258 A CN 109202258A CN 201710539305 A CN201710539305 A CN 201710539305A CN 109202258 A CN109202258 A CN 109202258A
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- aluminium alloy
- ultrasonic
- crystal boundary
- ultrasonic impact
- welding
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Classifications
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
A kind of method that the present invention discloses increase aluminium alloy CMT weldering crystal boundary, in aluminium alloy CMT welding process, the position of ultrasonic impact device impact aluminium sheet immobilizes, and welds overall process with ultrasonic vibration.The energy of ultrasonic wave is introduced molten bath since striker pin periodically hits aluminium sheet by welding process, by the way that ultrasonic cavitation and acoustic streaming improved effect be microcosmic and mechanical property.Grain boundaries atomic arrangement is irregular, and crystal boundary has inhibition to the movement of dislocation at normal temperature, and plastic deformation resistance is caused to improve, and macro manifestations are crystal boundary than transgranular intensity with higher and hardness.
Description
Technical field
The invention belongs to welding technology fields, more particularly, relate to the use of the side that ultrasonic impact introduces ultrasonic vibration
Method improves aluminium alloy CMT plumb joint grain boundary width and quantity.
Background technique
Cold metal transfer technology (Cold Metal Transfer, CMT) is that Austrian Fu Nisi company welds in steel and aluminium
It connects, the welding technique without a kind of low_input_power amount developed on splashing arc stricking techniques and micro-force sensing technical foundation.CMT technology
Innovation be by the droplet transfer in conjunction with wire feed process, to reduce the heat input of welding process, really realize
It is welded without splashing.Aluminium alloy has many good characteristics, and such as light weight, density is small and good resilient plastic, specific strength
It is high, wear-resistant, corrosion-resistant, electrical and thermal conductivity is good and processing performance is excellent etc., be widely used in aerospace, traffic fortune
In the manufacturing industry such as defeated and national defense construction.Pass through cold metal transfer technology CMT (cold metal transfer) welding aluminum alloy mistake
The performance of journey, welding point impacts, increasingly important for integral solder effect.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide it is a kind of increase aluminium alloy CMT weldering crystal boundary method,
Increase the method for aluminium alloy CMT plumb joint grain boundary width and quantity, under normal temperature conditions, improve joint mechanical property.
Technical purpose of the invention is achieved by following technical proposals:
A method of increasing aluminium alloy CMT weldering crystal boundary and uses ultrasonic impact device in aluminium alloy CMT welding process
Aluminium alloy plate to be welded is impacted, so that in the welding process, welding overall process is adjoint with ultrasonic impact in welding overall process
Ultrasonic vibration.Welding process, since ultrasonic impact needle periodically hits aluminium alloy plate, ultrasonic vibration is equivalent to be applied to liquid state molten pool
Add an alternation external force, there is stirring action in liquid metal and the energy of ultrasonic wave is introduced into molten bath, passes through ultrasonic cavitation
Improve crystal boundary performance with acoustic streaming effect, improves micro mechanical property.
When carrying out ultrasonic impact, the frequency of ultrasonic impact is 15-20kHz.
When carrying out ultrasonic impact, aluminium alloy and ultrasonic impact device location to be welded is selected to immobilize, i.e., it is ultrasonic
The striker pin of impact device and aluminium alloy contact position are constant, and welding gun is walked, and striker pin is with the shortest distance of welding gun
80—100mm。
Technical solution of the present invention uses ultrasonic impact equipment, in welding overall process with ultrasonic vibration, by the energy of ultrasonic wave
Amount introduces molten bath, promotes liquid metal flows in molten bath to improve microcosmic and mechanical property, grain boundaries atomic arrangement is irregular, normal
The lower crystal boundary of temperature has inhibition to the movement of dislocation, causes plastic deformation resistance to improve, macro manifestations are crystal boundary than transgranular tool
There are higher intensity and hardness.
Detailed description of the invention
Fig. 1 is ultrasonic vibration aluminium alloy CMT soldering equipment structural schematic diagram in the present invention.
Fig. 2 is the connector schematic diagram that technical solution of the present invention carries out aluminium alloy CMT weldering.
Fig. 3 is the microstructure morphology photo in 1 region of welding point center tap shown in Fig. 2.
Fig. 4 is the microstructure morphology photo in 2 region of welding point center tap shown in Fig. 2.
Fig. 5 is the result schematic diagram that EDS energy spectrum analysis is carried out in the embodiment of the present invention.
Fig. 6 is the weld seam average hardness comparison diagram welded using technical solution of the present invention.
Specific embodiment
Technical solution of the present invention is further illustrated combined with specific embodiments below:
Fig. 1 is ultrasonic vibration aluminium alloy CMT welding process schematic diagram.As shown in Figure 1, striker pin is rushed in welding process
It hits position to remain unchanged, the shortest distance of striker pin and welding gun is 80mm.Test base material of the present invention is aluminium alloy 6061,
Specimen size is 300 × 150 × 4mm, and welding wire selects ER4043.Using direct current cold metal transfer technology CMT to the aluminium of 4mm plate thickness
Alloy carries out disk diffusion method test.Testing equipment selects 4000 type of CMT Advanced that CMT welding machine is Fu Nisi company to weld
Machine, ultrasonic impact select the ultrasonic impact machine of Tianjin Tian Dong perseverance development in science and technology Co., Ltd production.
It mainly realizes that steps are as follows:
1. being removed the oxidation film on aluminium sheet with wire brush before overlay welding experiment, until exposing metallic luster, will be applied with alcohol
Respectively the greasy dirt within the scope of about 30-40mm and foul clean up on surface at weldering, after aoxidizing membrane removal, should the welding in 2h, in order to avoid
Regenerate new oxidation film；
2. setting welding parameter, wire feed rate 5m/min, the ultrasonic speed of travel and the welding gun totality speed of travel are
30cm/min, frequency are adjusted to 20kHz, gas flow 20L/min；
3. sample to be welded is fixed with fixture；Open ultrasonic impact machine switch, after 5 seconds, ultrasonic impact seat in the plane set it is constant,
Welding gun walking；
4. after built-up welding, closing ultrasonic impact switch.
5. passing through wire cutting by ultrasonic vibration aluminium alloy CMT plumb joint and without ultrasonic vibration aluminium alloy CMT plumb joint
It is cut, after sanding and polishing, the crystal boundary variation of connector is watched under flying-spot microscope.Under flying-spot microscope, crystal boundary
For canescence.Through Fig. 3 it can be found that compared with the connector crystal boundary of non-ultrasonic vibration, by the junction portion of ultrasonic vibration
Region crystal boundary broadens.By Fig. 4 it can be found that ultrasonic vibration can increase the quantity of crystal boundary.It is brilliant before and after ultrasonic vibration such as Fig. 5
The ingredient on boundary is basically unchanged, i.e., ultrasonic treatment will not influence crystal ingedient.It is measured simultaneously using the Vickers hardness of model MH-3
The micro-vickers hardness for measuring axis of a weld, measures since face of weld, and every 0.3mm measures a point, pressure 200g, pressure maintaining
15s, ultrasonic vibration improve the hardness of weld seam, as shown in fig. 6, connector average hardness obviously increases after ultrasonic vibration.
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (7)
1. a kind of method for increasing aluminium alloy CMT weldering crystal boundary, which is characterized in that in aluminium alloy CMT welding process, use ultrasound
Percussion mechanism impacts aluminium alloy plate to be welded, so that in the welding process, welding is complete with ultrasonic impact in welding overall process
Process is with ultrasonic vibration；Welding process, since ultrasonic impact needle periodically hits aluminium alloy plate, ultrasonic vibration is equivalent to liquid
State molten bath applies an alternation external force, has stirring action in liquid metal and the energy of ultrasonic wave is introduced molten bath, pass through
Ultrasonic cavitation and acoustic streaming effect are to improve crystal boundary performance.
2. a kind of method for increasing aluminium alloy CMT weldering crystal boundary according to claim 1, which is characterized in that carrying out ultrasound
When impact, the frequency of ultrasonic impact is 15-20kHz.
3. a kind of method for increasing aluminium alloy CMT weldering crystal boundary according to claim 1, which is characterized in that carrying out ultrasound
When impact, aluminium alloy and ultrasonic impact device location to be welded is selected to immobilize, i.e., the striker pin of ultrasonic impact equipment with
Aluminium alloy contact position is constant, and welding gun is walked, and striker pin and the shortest distance of welding gun are 80-100mm.
4. ultrasonic impact is in the method for increasing aluminium alloy CMT weldering crystal boundary, which is characterized in that in aluminium alloy CMT welding process, make
Aluminium alloy plate to be welded is impacted with ultrasonic impact device, so that with ultrasonic impact in welding overall process, in the welding process,
Overall process is welded with ultrasonic vibration；Welding process, since ultrasonic impact needle periodically hits aluminium alloy plate, ultrasonic vibration is suitable
In applying an alternation external force to liquid state molten pool, there is stirring action in liquid metal and introduce the energy of ultrasonic wave molten
Pond improves crystal boundary performance by ultrasonic cavitation and acoustic streaming effect.
5. ultrasonic impact according to claim 4 increase aluminium alloy CMT weldering crystal boundary method, which is characterized in that into
When row ultrasonic impact, the frequency of ultrasonic impact is 15-20kHz.
6. ultrasonic impact according to claim 4 increase aluminium alloy CMT weldering crystal boundary method, which is characterized in that into
When row ultrasonic impact, aluminium alloy and ultrasonic impact device location to be welded is selected to immobilize, i.e. ultrasonic impact equipment is rushed
Firing pin and aluminium alloy contact position are constant, and welding gun is walked, and striker pin and the shortest distance of welding gun are 80-100mm.
7. ultrasonic impact according to claim 4 is in the method for increasing aluminium alloy CMT weldering crystal boundary, which is characterized in that aluminium closes
Gold is aluminium alloy 6061.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539305.3A CN109202258A (en) | 2017-07-04 | 2017-07-04 | A method of increasing aluminium alloy CMT and welds crystal boundary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710539305.3A CN109202258A (en) | 2017-07-04 | 2017-07-04 | A method of increasing aluminium alloy CMT and welds crystal boundary |
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| CN109202258A true CN109202258A (en) | 2019-01-15 |
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| CN201710539305.3A Pending CN109202258A (en) | 2017-07-04 | 2017-07-04 | A method of increasing aluminium alloy CMT and welds crystal boundary |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090062599A (en) * | 2007-12-13 | 2009-06-17 | 주식회사 포스코 | Fe-al different metals welding appartus and welding method using ultrarsonic vibration |
| CN103586571A (en) * | 2013-11-25 | 2014-02-19 | 国家电网公司 | Device and method for improving quality of aluminum alloy plasma arc welded joint |
| CN104785926A (en) * | 2015-04-14 | 2015-07-22 | 西南交通大学 | Ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology |
| CN105710537A (en) * | 2016-05-05 | 2016-06-29 | 北京隆源自动成型系统有限公司 | Ultrasonic assistec laser electric arc composite welding method of aluminum alloy |
| CN105880852A (en) * | 2016-05-28 | 2016-08-24 | 长春理工大学 | Ultrasonically assisted pulse laser-MIG composite heat source welding device and welding method thereof |
-
2017
- 2017-07-04 CN CN201710539305.3A patent/CN109202258A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090062599A (en) * | 2007-12-13 | 2009-06-17 | 주식회사 포스코 | Fe-al different metals welding appartus and welding method using ultrarsonic vibration |
| CN103586571A (en) * | 2013-11-25 | 2014-02-19 | 国家电网公司 | Device and method for improving quality of aluminum alloy plasma arc welded joint |
| CN104785926A (en) * | 2015-04-14 | 2015-07-22 | 西南交通大学 | Ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology |
| CN105710537A (en) * | 2016-05-05 | 2016-06-29 | 北京隆源自动成型系统有限公司 | Ultrasonic assistec laser electric arc composite welding method of aluminum alloy |
| CN105880852A (en) * | 2016-05-28 | 2016-08-24 | 长春理工大学 | Ultrasonically assisted pulse laser-MIG composite heat source welding device and welding method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘强 等: ""送丝速度对6061铝合金CMT焊接接头性能的影响"", 《热加工工艺》 * |
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