CN105234555B - A kind of ultrasonic assistant transition liquid-phase connection method - Google Patents
A kind of ultrasonic assistant transition liquid-phase connection method Download PDFInfo
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- CN105234555B CN105234555B CN201510779986.1A CN201510779986A CN105234555B CN 105234555 B CN105234555 B CN 105234555B CN 201510779986 A CN201510779986 A CN 201510779986A CN 105234555 B CN105234555 B CN 105234555B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000007791 liquid phase Substances 0.000 title claims abstract description 29
- 230000007704 transition Effects 0.000 title claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 238000007711 solidification Methods 0.000 claims abstract description 19
- 230000008023 solidification Effects 0.000 claims abstract description 19
- 230000004913 activation Effects 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 23
- 239000011777 magnesium Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 8
- 230000005496 eutectics Effects 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910001097 yellow gold Inorganic materials 0.000 claims description 4
- 239000010930 yellow gold Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 239000011888 foil Substances 0.000 claims description 2
- 239000010944 silver (metal) Substances 0.000 claims description 2
- 238000004544 sputter deposition Methods 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 238000011049 filling Methods 0.000 abstract description 6
- 238000000227 grinding Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000007787 solid Substances 0.000 abstract description 4
- 238000005476 soldering Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 16
- 239000010410 layer Substances 0.000 description 12
- 230000001052 transient effect Effects 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 10
- 238000009792 diffusion process Methods 0.000 description 7
- 239000006104 solid solution Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 229910009369 Zn Mg Inorganic materials 0.000 description 4
- 229910007573 Zn-Mg Inorganic materials 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 marmem Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A kind of ultrasonic assistant transition liquid-phase connection method, the present invention relates to a kind of ultrasonic assistant transition liquid-phase connection method.The problem of the present invention is to solve existing transition liquid-phase Joining Technology to need to complete in a vacuum or inert atmosphere, and time-consuming, method is：First, mother metal to be welded is subjected to mechanical grinding and cleaning, then assembles component to be welded；2nd, ultrasonic tool head is applied orthogonal on component to be welded, applies pressure, then heat, then apply ultrasonic activation, complete isothermal solidification；Three：If the isothermal solidification time is more than 10min, continue to heat up, then apply ultrasonic activation again, complete isothermal solidification；4th, cool to room temperature with the furnace, that is, complete.The present invention realizes abolishing for interface oxidation film by the sound plastic effect of ultrasonic wave in solids, shortens weld interval, weld seam filling rate is up to more than 95%.The present invention is applied to soldering field.
Description
Technical field
The present invention relates to a kind of ultrasonic assistant transition liquid-phase connection method.
Background technology
With the development of science and technology, in particular with the fast development of Aero-Space, space technology, sophisticated manufacturing,
So that interconnection technique is also evolving and perfect.Partial transient liquid technology is since being developed in strengthened dispersion alloy, fibre
It is widely used in the connection of dimension enhancing composite, dissimilar metal and new material.Partial transient liquid is due to deflection
Small, it is easy to remove surface film oxide during connection, it is connected better than diffusion；Linker chemistry composition, the tissue of partial transient liquid
Structure can make it be better than soldering again with mother metal uniformity.The advantages of technological synthesis diffusion welding and soldering, can
Excellent microstructure and properties of joint is obtained, causes a large amount of concerns of domestic and international numerous areas in recent years, and obtain more and more wider
General application.
The principle of partial transient liquid adds intermediate layer between mother metal, is incubated at a temperature of less than mother metal fusing point,
Using intermediate layer fuse itself or eutectic reaction occur with mother metal form a number of liquid phase on linkage interface, while by
Accelerate diffusion in the effect of liquid phase, in liquid phase reduce fusing point element rapidly to matrix spread so that combination interface chemistry into
Clearly demarcated aobvious to change, the liquid phase in balancing each other is reduced, and is caused to be incubated a period of time combination interface at a certain temperature and is realized that isothermal coagulates
Gu.Homogenized by isothermal solidification, solid-phase component, finally obtain the joint consistent with mother metal chemical composition and even tissue and obtain
Obtain and continuously engage covering weave.Duvail D S propose the concept and mechanism of partial transient liquid first within 1974.It is domestic
It is called transition liquid-phase weldering or diffusion brazing.Partial transient liquid as a kind of new accurate interconnection technique, have deform it is small,
The advantages that temperature is low, residual stress is small, strength of joint is high is connected, the material of melting welding, particularly high temperature are difficult to available for connection and is closed
Gold, marmem, intermetallic compound and composite etc..
Up to this point, many scholars various transition liquid-phase connection methods at exploitation, such as active transient liquid phase connect
Connect, PTLP bonding, nonmetal oxide intermediate layer partial transient liquid, non-interlayer partial transient liquid, temperature ladder
Spend partial transient liquid, two-step heating partial transient liquid, non axial constant-pressure partial transient liquid etc., most of welding sides
Method is needed in a vacuum or inert atmosphere to complete welding process.Soaking time required in other welding process generally compared with
It is long, it is even longer to generally require dozens of minutes.
The content of the invention
The invention aims to solve the shearing strength of joint difference of existing liquid phase connecting method welding and weld seam filling
A kind of the problem of the problem of rate is low connects with transition liquid-phase needs vacuum environment, the Connection Time is long, there is provided ultrasonic assistant transition
Liquid phase connecting method.
A kind of ultrasonic assistant transition liquid-phase connection method of the present invention is as follows：First, by mother metal to be welded carry out mechanical grinding and
Cleaning, then by " mother metal-intermediate materials to be welded-mother metal to be welded " order assemble, obtain component to be welded, wherein mother metal to be welded with
Intermediate layer material has low melting eutecticses；2nd, ultrasonic tool head is applied orthogonal on component to be welded, apply pressure be 0.02~
5kN, then heat, then apply ultrasonic activation 1s~10min, complete isothermal solidification；Three：If the isothermal solidification time is more than
10min, then continue to heat up, then apply ultrasonic activation 1s~10min again, complete isothermal solidification；4th, in step 2 or step
After three complete isothermal solidification, cool to room temperature with the furnace, that is, complete.
Ultrasonic assistant transition liquid-phase connection method proposed by the invention, can be completed in atmospheric conditions, and being capable of pole
Greatly shorten the time formed required for solid solution joint.With normal ultrasound waves assistant brazings (by ultrasonic wave in a liquid
Cavitation effect is completed oxide-film and abolished) to compare, this method realizes interface oxygen by ultrasonic wave in sound plastic effect in solids
Change abolishing for film, ultrasonic activation can promote substantial amounts of liquid to extrude, and be imitated in cavitation effect, acoustic streaming effect and sound plasticity
Accelerate solid solution diffusion behavior under the comprehensive function answered, shorten weld interval, weld seam filling rate is up to more than 95%.
Brief description of the drawings
Fig. 1 is 1 connection procedure schematic diagram of experiment；
Fig. 2 is Mg-Zn-Mg microstructures prepared by 1 control group of experiment；
Fig. 3 is Mg-Zn-Mg microstructures prepared by 1 test group of experiment.
Embodiment
Embodiment one：A kind of ultrasonic assistant transition liquid-phase connection method of present embodiment is as follows：First, will be to be welded
Mother metal carries out mechanical grinding and cleaning, then assembles, obtains to be welded by the order of " mother metal-intermediate materials to be welded-mother metal to be welded "
Component, wherein mother metal to be welded has low melting eutecticses with intermediate layer material；2nd, ultrasonic tool head is applied orthogonal to component to be welded
On, application pressure is 0.02~5kN, is then heated, then applies ultrasonic activation 1s~10min, completes isothermal solidification；Three：If
The isothermal solidification time is more than 10min, then continues to heat up, and then applies ultrasonic activation 1s~10min again, completes isothermal solidification；
4th, after step 2 or step 3 complete isothermal solidification, cool to room temperature with the furnace, that is, complete.
The ultrasonic assistant transition liquid-phase connection method that present embodiment is proposed, can be completed in atmospheric conditions, and energy
It is enough greatly to shorten the time formed required for solid solution joint.With normal ultrasound waves assistant brazing (by ultrasonic wave in liquid
In cavitation effect complete oxide-film abolish) compare, this method realizes boundary by ultrasonic wave in sound plastic effect in solids
Surface oxidation film is abolished, and ultrasonic activation can promote substantial amounts of liquid to extrude, and is moulded in cavitation effect, acoustic streaming effect and sound
Property effect comprehensive function under accelerate solid solution diffusion behavior, shorten weld interval, weld seam filling rate is up to more than 95%.
Embodiment two：Present embodiment is unlike embodiment one：If mother metal to be welded is magnesium alloy
Or magnesium-based composite material, then intermediate layer material is Zn, Cu, Al, Ag or yellow gold；Answered if mother metal to be welded is aluminium alloy or aluminium base
Condensation material, then intermediate layer material is Zn, Cu, Mg, Ag or yellow gold；If mother metal to be welded is copper alloy or Cu-base composites,
Then intermediate layer material is Zn, Al, Mg or Ag.It is other identical with embodiment one.
Embodiment three：Present embodiment is unlike embodiment one or two：In described in step 1
Between mother metal using evaporation or sputtering by the way of be preset in mother metal surface to be welded.It is other identical with embodiment one or two.
Embodiment four：Unlike one of present embodiment and embodiment one to three：Described in step 1
Intermediate materials be placed in using paillon foil between the mother metal to be welded of both sides.It is other identical with one of embodiment one to three.
Embodiment five：Described in step 2 unlike one of present embodiment and embodiment one to four
The heating rate of heating is 5~10 DEG C/min.It is other identical with one of embodiment one to four.
Embodiment six：Unlike one of present embodiment and embodiment one to five：Described in step 2
Heating temperature higher than the low melting eutecticses of mother metal to be welded and intermediate layer material temperature, and less than the fusing point of intermediate layer material.
It is other identical with one of embodiment one to five.
Embodiment seven：Unlike one of present embodiment and embodiment one to six：Step 2 or step
Ultrasonic frequency is 16~45KHz in rapid three, and amplitude is 5~25 μm.It is other identical with one of embodiment one to six.
Embodiment eight：Unlike one of present embodiment and embodiment one to seven：Step 3 heats up
Temperature be not higher than 0.9 times of mother metal fusing point.It is other identical with one of embodiment one to seven.
Beneficial effects of the present invention are verified by tests below：
Experiment 1：Test group ultrasonic assistant transition liquid-phase connection method is as follows：First, by magnesium alloy carry out mechanical grinding and
Cleaning, then assembled by the order of " magnesium alloy-Zn paper tinsels-magnesium alloy ", wherein Zn paper tinsels are 0.05mm pure Zn paper tinsels, obtain to be welded group
Part；2nd, ultrasonic tool head is applied orthogonal on component to be welded, application pressure is 0.03kN, is then added using resistance radiation
Hot method, under conditions of firing rate is 5~10 DEG C/min, component to be welded is heated to 370 DEG C, then apply ultrasonic activation
2min, isothermal solidification is completed, room temperature is then cooled to the furnace, that is, completes.
Contrast test is：First, magnesium alloy is subjected to mechanical grinding and cleaning, then by " magnesium alloy-Zn paper tinsels-magnesium alloy "
Order assembles, and wherein Zn paper tinsels are 0.05mm pure Zn paper tinsels, obtain component to be welded；2nd, ultrasonic tool head is applied orthogonal to treat
Weld on component, application pressure is 0.03kN, is 5~10 DEG C/min's in firing rate then using resistance radiation heating methods
Under the conditions of, component to be welded is heated to 370 DEG C, then apply ultrasonic activation 3s, isothermal solidification is completed, then cools to room with the furnace
Temperature, that is, complete.
The magnesium alloy of this experiment is AZ31B, and this experiment connection procedure schematic diagram is as shown in Figure 1.
As shown in Fig. 2 as seen from Figure 2, original Zn layers disappear Mg-Zn-Mg microstructures prepared by control group,
Chemical reaction occurs in joint and forms Mg-Zn compound tissues.
As shown in figure 3, as seen from Figure 3, original Zn layers disappear Mg-Zn-Mg microstructures prepared by test group,
Mg-Zn compounds are not formed, but Zn elements are solid-solution in Mg matrixes completely, are formed and the close tissue of Mg substrates.By Fig. 2 and
Fig. 3 contrast understand, in joint the presence of continuous compound certainly will influence joint performance, Fig. 2 center taps shear strength is 55MPa,
And Fig. 3 center taps shear strength is 106MPa, reach the intensity of mother metal.Test group weld seam filling rate reaches 98%
Experiment 2, this experiment ultrasonic assistant transition liquid-phase connection method are as follows：First, by magnesium alloy carry out mechanical grinding and
Cleaning, then assembled by the order of " aluminum matrix composite-Zn paper tinsels-aluminum matrix composite ", wherein Zn paper tinsels are 0.05mm pure Zn
Paper tinsel, obtain component to be welded；2nd, ultrasonic tool head is applied orthogonal on component to be welded, application pressure is 0.05kN, is then adopted
With resistance radiation heating methods, under conditions of firing rate is 5~10 DEG C/min, component to be welded is heated to 390 DEG C, then apply
Add ultrasonic activation 10s, then heat to 480 DEG C, apply ultrasonic activation 20s, complete isothermal solidification, then cool to room with the furnace
Temperature, that is, complete.
The aluminum matrix composite of this experiment is 55% volume fraction SiC particle-reinforced Al matrix composite, and weld seam is filled
Rate reaches 96%.
From above-mentioned experiment, the present invention realizes interface oxidation film by ultrasonic wave in sound plastic effect in solids
To abolish, ultrasonic activation can promote substantial amounts of liquid to extrude, and in the comprehensive of cavitation effect, acoustic streaming effect and sound plastic effect
The lower acceleration solid solution diffusion behavior of cooperation, shortens weld interval, weld seam filling rate is up to more than 95%.
Claims (7)
1. a kind of ultrasonic assistant transition liquid-phase connection method, it is characterised in that this method is as follows：First, mother metal to be welded is subjected to machine
Tool is polished and cleaning, is then assembled by the order of " mother metal-intermediate materials to be welded-mother metal to be welded ", component to be welded is obtained, wherein treating
Weldering mother metal has low melting eutecticses with intermediate layer material；2nd, ultrasonic tool head is applied orthogonal on component to be welded, applies pressure
For 0.02~5kN, then heat, then apply ultrasonic activation 1s~10min, complete isothermal solidification；Three：If the isothermal solidification time
More than 10min, then continue to heat up, then apply ultrasonic activation 1s~10min again, complete isothermal solidification；4th, in step 2 or
After step 3 completes isothermal solidification, cool to room temperature with the furnace, that is, complete；Ultrasonic frequency is 16 wherein in step 2 and step 3
~45KHz, amplitude are 5~25 μm.
2. a kind of ultrasonic assistant transition liquid-phase connection method according to claim 1, it is characterised in that if mother metal to be welded
For magnesium alloy or magnesium-based composite material, then intermediate layer material is Zn, Cu, Al, Ag or yellow gold；If mother metal to be welded is aluminium alloy
Or aluminum matrix composite, then intermediate layer material is Zn, Cu, Mg, Ag or yellow gold；If mother metal to be welded is copper alloy or copper-based multiple
Condensation material, then intermediate layer material is Zn, Al, Mg or Ag.
3. a kind of ultrasonic assistant transition liquid-phase connection method according to claim 1, it is characterised in that described in step 1
Intermediate materials using evaporation or sputtering by the way of be preset in mother metal surface to be welded.
4. a kind of ultrasonic assistant transition liquid-phase connection method according to claim 1, it is characterised in that described in step 1
Intermediate materials be placed in using paillon foil between the mother metal to be welded of both sides.
5. a kind of ultrasonic assistant transition liquid-phase connection method according to claim 1, it is characterised in that described in step 2
The heating rate of heating be 5~10 DEG C/min.
6. a kind of ultrasonic assistant transition liquid-phase connection method according to claim 1, it is characterised in that described in step 2
Heating temperature higher than the low melting eutecticses of mother metal to be welded and intermediate layer material temperature, and less than the fusing point of intermediate layer material.
7. a kind of ultrasonic assistant transition liquid-phase connection method according to claim 1, it is characterised in that step 3 heats up
Temperature be not higher than 0.9 times of mother metal fusing point.
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| CN106735672A (en) * | 2016-12-06 | 2017-05-31 | 上海航天设备制造总厂 | The room temperature supersonically preparation method of intermetallic compound joint |
| CN106735833A (en) * | 2016-12-26 | 2017-05-31 | 天津理工大学 | Sound based on eutectic reaction causes instant liquid-phase diffusion welding welding method |
| CN108927608A (en) * | 2017-05-27 | 2018-12-04 | 天津理工大学 | Sound based on monotectic reaction causes transient liquid phase welding method and its application |
| CN108637451A (en) * | 2018-05-28 | 2018-10-12 | 东莞市新玛博创超声波科技有限公司 | A kind of method of low temperature ultrasonic auxiliary magnesium alloy welding |
| CN109365983A (en) * | 2018-12-14 | 2019-02-22 | 东莞市新玛博创超声波科技有限公司 | A kind of ultrasonic wave added welding method of the magnesium alloy of 72Cu-28Zn alloy as intermediate reaction material layer |
| CN109365990B (en) * | 2018-12-14 | 2020-10-27 | 东莞市新玛博创超声波科技有限公司 | Ultrasonic-assisted aluminum alloy welding method for obtaining full solid solution joint in short time |
| CN109648185B (en) * | 2019-01-08 | 2021-04-09 | 青岛理工大学 | Ultrasonic-assisted transient liquid phase diffusion connection method for high-strength corrosion-resistant Mg/Al connection joint |
| CN111604579A (en) * | 2019-02-25 | 2020-09-01 | 邢台职业技术学院 | Method for welding functional material and application thereof |
| CN110026672B (en) * | 2019-04-01 | 2021-11-26 | 天津大学 | Ultrasonic cavitation welding method |
| CN112059397A (en) * | 2019-06-10 | 2020-12-11 | 天津理工大学 | Method for ultrasonic-assisted welding of high-temperature material under atmosphere protection |
| CN112872528A (en) * | 2021-03-25 | 2021-06-01 | 吉林大学 | Dissimilar metal ultrasonic-assisted eutectic reaction brazing method |
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| JPH1050758A (en) * | 1996-08-01 | 1998-02-20 | Hitachi Ltd | Ultrasonic connecting method and connecting structure |
| CN1224492C (en) * | 2003-02-27 | 2005-10-26 | 哈尔滨工业大学 | High efficiency aluminium base composite material liquid phase vibrating welding method |
| CN102266994B (en) * | 2011-07-20 | 2013-04-24 | 重庆理工大学 | Heterogeneous semi-solid brazing method for aluminum alloy and magnesium alloy under assistance of external vibration energy |
| CN103071910A (en) * | 2013-01-14 | 2013-05-01 | 广东工业大学 | Double-ultrasonic-high-frequency induction combined precision micro-connection device and method |
| CN104191057B (en) * | 2014-08-13 | 2016-05-18 | 中国电器科学研究院有限公司 | A kind of preparation method of porous metal matrix bluk recombination brazing filler metal alloy soldered fitting |
| CN104551289A (en) * | 2015-01-20 | 2015-04-29 | 武汉理工大学 | Different-frequency multi-contact ultrasonic-assisted braze welding method |
| CN104772542B (en) * | 2015-04-14 | 2017-07-11 | 西南交通大学 | The hard alloy of WC particle In-sltu reinforcement and the ultrasonic brazing method of steel |
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