CN104551289A - Different-frequency multi-contact ultrasonic-assisted braze welding method - Google Patents
Different-frequency multi-contact ultrasonic-assisted braze welding method Download PDFInfo
- Publication number
- CN104551289A CN104551289A CN201510027436.4A CN201510027436A CN104551289A CN 104551289 A CN104551289 A CN 104551289A CN 201510027436 A CN201510027436 A CN 201510027436A CN 104551289 A CN104551289 A CN 104551289A
- Authority
- CN
- China
- Prior art keywords
- welding
- mother metal
- ultrasonic
- vibration
- welded
- 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.)
- Pending
Links
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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/06—Soldering, e.g. brazing, or unsoldering making use of vibrations, e.g. supersonic vibrations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a different-frequency multi-contact ultrasonic-assisted braze welding method. The method comprises the following steps: prefabricating brazing filler between two flat plate base metals to obtain a connector to be welded; heating the connector to be welded by an external heating source to completely melt the brazing filler; symmetrically and uniformly distributing two or more than two ultrasonic welding rods with different vibration frequencies on the surfaces of the base metals of the connector and applying welding pressure; opening an ultrasonic vibration device to apply ultrasonic vibration with certain power to the connector to be welded for certain time; and stopping heating to finish a braze welding process after the vibration is finished. The plurality of ultrasonic welding rods with the different vibration frequencies are used for applying the ultrasonic vibration to the different parts of the surfaces of the base metals, and the wetting and uniform distribution of liquid-phase brazing filler on the surfaces of the base metals can be promoted by sufficiently utilizing cavitation effect of ultrasonic waves, so that a large melting surface braze welding process without brazing flux and under an oxygen environment is realized; the welding process is simple and has high welding efficiency and is a green and efficient welding process.
Description
Technical field
The invention belongs to welding field, be specifically related to a kind of alien frequencies multiconductor ultrasonic assistant brazing method.
Background technology
Soldering tech has a wide range of applications in manufacturing.Compare other material joining methods, soldering processes have the many merits such as applicability is wide, online production ability is strong, reliability is high.Usually need during soldering to use scaling powder to remove the oxide on mother metal surface to be welded or low wettability medium, promote the wetting and spreading of molten solder alloy on mother metal surface.But easy forming reactions pore during use scaling powder, when the dull and stereotyped mother metal of the large fusion face of soldering, these reaction pores are difficult to overflow from brazed seam, make joint have lower welded rate.
Chinese patent (the patent No.: 200910071301.2) invented a kind of ultrasonic assistant solder without soldering acid technique of Al alloy.In these soldering processes, brazing filler metal alloy, by the pre-porch built in joint, fills brazed seam by capillarity after brazing filler metal melts, and by the impact of liquid phase solder depth of cracking closure, this technique is difficult to the preparation realizing large fusion face soldered fitting.(patent No.: 201310071404.5) pass through by brazing filler metal alloy in advance between two dull and stereotyped mother metals to be welded, adopts single-point ultrasonic vibration to achieve the preparation of high welded rate soldered fitting to Chinese patent.But by ultrasonic vibration power and the ultrasonic vibration restriction in solid-phase media surface propagation distance, this single-point ultrasonic vibration assistant brazing technique is difficult to prepare the dull and stereotyped soldered fitting of super large fusion face.
Summary of the invention
The object of the present invention is to provide the method for welding of the dull and stereotyped mother metal of a kind of alien frequencies multiconductor ultrasonic assistant, the method can realize the preparation of the dull and stereotyped soldered fitting of large fusion face, and technique is simple, welded rate is high, is applicable to applying.
For achieving the above object, the technical solution used in the present invention is: a kind of alien frequencies multiconductor ultrasonic assistant brazing method, comprises the following steps:
1) solder is placed between two pieces of dull and stereotyped mother metals and obtains joint to be welded, joint to be welded is positioned on heater, open heater and solder is melted completely;
2) supersonic welding bars different for two or more frequency is arranged on the mother metal surface of upper end of joint to be welded, and applies welding pressure;
3) power of supersonic welding bar, frequency and time of vibration are set, carry out ultrasonic vibration by the dull and stereotyped mother metal of supersonic welding pole pair;
4) ultrasonic vibration terminates rear stopping heating, takes out soldered fitting, complete brazing process when joint brazed seam layer solidifies completely.
According to such scheme, the frequency difference between described supersonic welding bar is 0.1 ~ 20kHz.
According to such scheme, described supersonic welding vibration of bar frequency is 20 ~ 60kHz, and oscillation power is 50 ~ 2000W, and the ultrasonic vibration time is 1 ~ 200s.
According to such scheme, described welding pressure is 0.5 ~ 5MPa.
According to such scheme, described supersonic welding bar carries out symmetrical centered by the centre of form of mother metal.
Preferably, described supersonic welding bar distributes symmetrically and evenly centered by the centre of form of mother metal.
According to such scheme, the shape of described mother metal is complete circle, rectangle or other polygon, or is the middle circle with through hole, rectangle or other polygons.
According to such scheme, described supersonic welding vibration of bar direction is perpendicular to mother metal surface or is parallel to mother metal surface.
According to such scheme, described two pieces of mother metals are same material or non-same material.
According to such scheme, described mother metal is metal, pottery, metal-base composites or carbon-carbon composite.
According to such scheme, described mother metal can adopt the metal materials such as Al alloy, Fe alloy, Cu alloy, Ti alloy; Also the ceramic materials such as aluminium oxide, zirconia, carborundum can be adopted.
According to such scheme, the mode of heating of described heater is resistance heated, eddy-current heating, flame heat or heat in stove.
Preferably, in described joint to be welded less the or thermal conductivity of mother metal thickness preferably one side be placed on heater.
Compared with prior art, beneficial effect of the present invention is:
1) the multiple spot supersonic welding bar that the inventive method employing vibration frequency is different, assistant brazing is carried out by the ultrasonic vibration implementing discrete frequency at mother metal surface different parts simultaneously, make full use of physics that ultrasonic wave formed in liquid phase solder, chemical effect to promote liquid phase solder the wetting of mother metal surface and to be uniformly distributed, realize the preparation of super large fusion face soldered fitting; The phenomenon of cancelling out each other or weakening between the ultrasonic wave adopting the ultrasonic vibration of multiple discrete frequency that different supersonic welding bar can be avoided to send, ensures hyperacoustic booster action further.
2) described supersonic welding bar distributes symmetrically and evenly centered by the centre of form of mother metal, promotes ultrasonic wave and liquid phase solder being uniformly distributed on mother metal surface, avoids the phenomenon of local heating's inequality, improves welding quality.
3) the present invention is without the need to using any scaling powder, and avoid the formation of reaction pore, in addition, the ultrasonic wave propagated in liquid phase solder also has degasification effect, can realize the preparation of high welded rate soldered fitting.
4) cavitation effect can be formed when ultrasonic wave is propagated in liquid phase solder and produce complicated physics, chemical effect in liquid phase solder, the microstructure of joint brazed seam layer can be improved thus, and improve the performance of joint.
5) weld interval that the present invention relates to is short, and productivity effect is high, can realize automatic welding.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the soldering schematic diagram of the dull and stereotyped mother metal of the circle described in the embodiment of the present invention 1.
Fig. 2 is the soldering top view of the dull and stereotyped mother metal of the circle described in the embodiment of the present invention 1.
Fig. 3 is the soldering schematic diagram of the square plate mother metal described in the embodiment of the present invention 2.
Fig. 4 is the soldering top view of the square plate mother metal described in the embodiment of the present invention 2.
Fig. 5 is the soldering schematic diagram of the triangle flat plate mother metal described in the embodiment of the present invention 3.
Fig. 6 is the soldering top view of the triangle flat plate mother metal described in the embodiment of the present invention 3.
In figure, 1 is mother metal, and 2 is mother metal, and 3 is solder, and 4 is heater, and 5 is supersonic welding bar, and 6 is supersonic welding bar, and 7 is supersonic welding.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
A kind of alien frequencies multiconductor ultrasonic assistant brazing method, adopt 1060 pure aluminum plates and T2 fine copper plate to be mother metal, pure tin solder is solder, and concrete method for welding comprises the following steps:
As shown in Figure 1 and Figure 2, get mother metal 1 (1060 pure aluminum plate) and mother metal 2 (T2 fine copper plate) each a slice, their size is Φ 100mm × 3mm, gets solder 3 (pure tin solder sheet, fusing point is 231 DEG C) one, it is of a size of Φ 100mm × 0.4mm; Solder 3 is formed between mother metal 1 and mother metal 2 in advance, then the mother metal 2 of the joint to be welded assembled one side is placed on heater 4 (plate resistance heater); Open heater 4 subsequently, when solder 3 melts completely, three supersonic welding bars 5,6,7 are distributed in centered by the center of circle of mother metal 1 upper surface of mother metal 1 symmetrically and evenly, and mother metal 1 are applied to the pressure of 0.5MPa, fully contact with mother metal 1 to make supersonic welding bar 5,6,7; Open ultrasonic vibration installation subsequently, ultrasonic vibration is carried out by supersonic welding bar 5,6,7 pairs of mother metals 1, the ultrasonic vibration time is 4s, wherein the frequency of supersonic welding bar 5 and power are respectively 20kHz and 400W, the frequency of supersonic welding bar 6 and power be respectively 28kHz and 500W, the frequency of supersonic welding bar 7 and power be respectively 35kHz and 600W; Ultrasonic vibration terminates rear stopping heating, rises supersonic welding bar and takes out soldered fitting, namely complete brazing process when brazed seam layer solidifies completely.
The soldered fitting that the present embodiment is obtained carries out Ultrasonic NDT, and the average welded rate of joint reaches more than 95%.
Embodiment 2
A kind of alien frequencies multiconductor ultrasonic assistant brazing method, adopt 1060 pure aluminum plates and aluminum oxide ceramic plate to be mother metal, Zn-3wt%Al solder sheet is solder, and concrete method for welding comprises the following steps:
As shown in Figure 3, Figure 4, get mother metal 1 (1060 pure aluminum plate) and mother metal 2 (aluminum oxide ceramic plate) each a slice, their size is respectively 50mm × 100mm × 4mm and 50mm × 100mm × 2mm, get solder 3 (Zn-3wt%Al solder sheet, fusion temperature is 380 ~ 400 DEG C) one, it is of a size of 50mm × 100mm × 0.4mm; Solder 3 is formed between mother metal 1 and mother metal 2 in advance, then the mother metal 2 of the joint to be welded assembled one side is placed on heater 4 (plate resistance heater); Open heater subsequently, when solder sheet 3 melts completely, supersonic welding bar 5 and 6 is evenly distributed on centered by the centre of form of mother metal 1 upper surface of upper mother metal 1 symmetrically, and respectively mother metal 1 is applied to the pressure of 0.5MPa, fully contact with mother metal 1 with 6 to make supersonic welding bar 5; Open ultrasonic vibration installation subsequently, ultrasonic vibration is carried out by supersonic welding bar 5 and 6 pairs of mother metals 1, the ultrasonic vibration time is 4s, wherein the frequency of supersonic welding bar 5 and power 20kHz and 500W respectively, the frequency of supersonic welding bar 6 and power be respectively 35kHz and 600W; Ultrasonic vibration terminates rear stopping heating, rises supersonic welding bar and takes out soldered fitting, namely complete brazing process when brazed seam layer solidifies completely.
The soldered fitting that the present embodiment is obtained carries out Ultrasonic NDT, and the average welded rate of joint reaches more than 95%.
Embodiment 3
A kind of alien frequencies multiconductor ultrasonic assistant brazing method, adopt 1060 pure aluminum plates to be mother metal, Zn-3wt%Al alloy is solder, and concrete method for welding comprises the following steps:
As shown in Figure 5, Figure 6, get mother metal 1 (1060 pure aluminum plate) and mother metal 2 (1060 pure aluminum plate) each a slice, its shape is equilateral triangle, the length of side is 200mm, thickness is 4mm, gets solder 3 (Zn-3Al solder sheet, fusion temperature is 380 ~ 400 DEG C), its shape and size are identical with mother metal 1, and thickness is 0.4mm; Solder 3 is formed between mother metal 1 and mother metal 2 in advance, then the mother metal 2 of the joint to be welded assembled one side is placed on heater 4 (plate resistance heater); Open heater 4 subsequently, when solder 3 melts completely, three supersonic welding bars 5,6,7 are distributed in centered by the centre of form of mother metal 1 (geometric center) upper surface of mother metal 1 symmetrically and evenly, and mother metal 1 is applied to the pressure of 1MPa, fully contact with mother metal 1 to make supersonic welding bar 5,6,7; Open ultrasonic vibration installation subsequently, ultrasonic vibration is carried out by supersonic welding bar 5,6,7 pairs of mother metals 1, the ultrasonic vibration time is 5s, wherein the frequency of supersonic welding bar 5 and power are respectively 20kHz and 400W, the frequency of supersonic welding bar 6 and power be respectively 28kHz and 500W, the frequency of supersonic welding bar 7 and power be respectively 28.8kHz and 500W; Ultrasonic vibration terminates rear stopping heating, rises supersonic welding bar and takes out soldered fitting, namely complete brazing process when brazed seam layer solidifies completely.
The soldered fitting that the present embodiment is obtained carries out Ultrasonic NDT, and the average welded rate of joint reaches more than 95%.
The each raw material that the present invention relates to and bound value thereof, interval value can realize the present invention, and lower limit value and the interval value of technological parameter of the present invention (as temperature, time etc.) can realize the present invention, do not enumerate embodiment at this.
Claims (8)
1. an alien frequencies multiconductor ultrasonic assistant brazing method, is characterized in that, comprise the following steps:
1) solder is placed between two pieces of mother metals and obtains joint to be welded, joint to be welded is placed on heater, open heater and solder is melted completely;
2) supersonic welding bars different for two or more frequency is arranged on the mother metal surface of upper end of joint to be welded, and applies welding pressure;
3) power of supersonic welding bar, frequency and time of vibration are set, carry out ultrasonic vibration by the dull and stereotyped mother metal of supersonic welding pole pair;
4) ultrasonic vibration terminates rear stopping heating, takes out soldered fitting, complete brazing process when joint brazed seam layer solidifies completely.
2. method for welding according to claim 1, is characterized in that, the frequency difference between described supersonic welding bar is 0.1 ~ 20kHz.
3. method for welding according to claim 2, is characterized in that, described supersonic welding vibration of bar frequency is 20 ~ 60kHz, and oscillation power is 50 ~ 2000W, and the ultrasonic vibration time is 1 ~ 200s.
4. method for welding according to claim 3, is characterized in that, described welding pressure is 0.5 ~ 5MPa.
5. the method for welding according to any one of Claims 1 to 4, is characterized in that, described supersonic welding bar carries out symmetrical centered by the centre of form of mother metal.
6. method for welding according to claim 5, is characterized in that, described supersonic welding vibration of bar direction is perpendicular to mother metal surface or is parallel to mother metal surface.
7. method for welding according to claim 5, is characterized in that, the shape of described mother metal is complete polygon or circle, or is the middle polygon with through hole or circle.
8. method for welding according to claim 5, is characterized in that, described mother metal is metal, pottery, metal-base composites or carbon-carbon composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027436.4A CN104551289A (en) | 2015-01-20 | 2015-01-20 | Different-frequency multi-contact ultrasonic-assisted braze welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510027436.4A CN104551289A (en) | 2015-01-20 | 2015-01-20 | Different-frequency multi-contact ultrasonic-assisted braze welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104551289A true CN104551289A (en) | 2015-04-29 |
Family
ID=53068936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510027436.4A Pending CN104551289A (en) | 2015-01-20 | 2015-01-20 | Different-frequency multi-contact ultrasonic-assisted braze welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104551289A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023855A (en) * | 2015-05-29 | 2015-11-04 | 哈尔滨工业大学深圳研究生院 | Chip bonding method for fast generating high-melting-point joint and ultrasonic pressure head design |
| CN105234555A (en) * | 2015-11-13 | 2016-01-13 | 哈尔滨普瑞斯材料科技有限公司 | Ultrasonic-assisted transitional liquid phase bonding method |
| CN105541366A (en) * | 2016-02-19 | 2016-05-04 | 武汉理工大学 | Low-temperature brazing method for ceramics |
| CN109175567A (en) * | 2018-11-01 | 2019-01-11 | 中国电子科技集团公司第三十八研究所 | A kind of method for welding of micro-strip plate large area ground connection |
| CN111151836A (en) * | 2020-01-13 | 2020-05-15 | 中国船舶重工集团公司第七二五研究所 | Connection method and application of high-temperature superconducting tape |
| CN115255537A (en) * | 2022-08-09 | 2022-11-01 | 吉林大学 | Ultrasonic-driven room-temperature ultra-fast brazing method |
| CN115519234A (en) * | 2022-11-10 | 2022-12-27 | 中国船舶重工集团公司第七二五研究所 | Ultrasonic vibration assists melting welding system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3822820A (en) * | 1973-09-20 | 1974-07-09 | Aluminum Co Of America | Sonic agitation of molten metal |
| US3833163A (en) * | 1973-03-08 | 1974-09-03 | Branson Instr | Ultrasonic apparatus |
| JP2004311578A (en) * | 2003-04-03 | 2004-11-04 | Fujikura Ltd | Method of joining printed wiring board and composite printed wiring board |
| CN101530942A (en) * | 2008-12-24 | 2009-09-16 | 哈尔滨工业大学 | Scraping, vibrating and soldering method for preparing foamed aluminum sandwich structure |
| CN101648305A (en) * | 2009-08-24 | 2010-02-17 | 宁波江丰电子材料有限公司 | Welding method of large-size target assembly |
| CN202763239U (en) * | 2012-08-31 | 2013-03-06 | 郑州机械研究所 | Auxiliary device for vibration induction brazing |
| CN104191057A (en) * | 2014-08-13 | 2014-12-10 | 中国电器科学研究院有限公司 | Preparing method for porous metal matrix compound brazing filler metal alloy soldering head |
-
2015
- 2015-01-20 CN CN201510027436.4A patent/CN104551289A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3833163A (en) * | 1973-03-08 | 1974-09-03 | Branson Instr | Ultrasonic apparatus |
| US3822820A (en) * | 1973-09-20 | 1974-07-09 | Aluminum Co Of America | Sonic agitation of molten metal |
| JP2004311578A (en) * | 2003-04-03 | 2004-11-04 | Fujikura Ltd | Method of joining printed wiring board and composite printed wiring board |
| CN101530942A (en) * | 2008-12-24 | 2009-09-16 | 哈尔滨工业大学 | Scraping, vibrating and soldering method for preparing foamed aluminum sandwich structure |
| CN101648305A (en) * | 2009-08-24 | 2010-02-17 | 宁波江丰电子材料有限公司 | Welding method of large-size target assembly |
| CN202763239U (en) * | 2012-08-31 | 2013-03-06 | 郑州机械研究所 | Auxiliary device for vibration induction brazing |
| CN104191057A (en) * | 2014-08-13 | 2014-12-10 | 中国电器科学研究院有限公司 | Preparing method for porous metal matrix compound brazing filler metal alloy soldering head |
Non-Patent Citations (1)
| Title |
|---|
| 万明习: "《生物医学超声学上册》", 31 May 2010, 科学出版社 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105023855A (en) * | 2015-05-29 | 2015-11-04 | 哈尔滨工业大学深圳研究生院 | Chip bonding method for fast generating high-melting-point joint and ultrasonic pressure head design |
| CN105023855B (en) * | 2015-05-29 | 2018-03-13 | 哈尔滨工业大学深圳研究生院 | A kind of die bonding method for quickly generating high-melting-point joint and the design of ultrasonic pressure head |
| CN105234555A (en) * | 2015-11-13 | 2016-01-13 | 哈尔滨普瑞斯材料科技有限公司 | Ultrasonic-assisted transitional liquid phase bonding method |
| CN105541366A (en) * | 2016-02-19 | 2016-05-04 | 武汉理工大学 | Low-temperature brazing method for ceramics |
| CN109175567A (en) * | 2018-11-01 | 2019-01-11 | 中国电子科技集团公司第三十八研究所 | A kind of method for welding of micro-strip plate large area ground connection |
| CN111151836A (en) * | 2020-01-13 | 2020-05-15 | 中国船舶重工集团公司第七二五研究所 | Connection method and application of high-temperature superconducting tape |
| CN111151836B (en) * | 2020-01-13 | 2021-12-24 | 中国船舶重工集团公司第七二五研究所 | Connection method and application of high-temperature superconducting tape |
| CN115255537A (en) * | 2022-08-09 | 2022-11-01 | 吉林大学 | Ultrasonic-driven room-temperature ultra-fast brazing method |
| CN115255537B (en) * | 2022-08-09 | 2023-09-26 | 吉林大学 | Ultra-fast brazing method under ultrasonic driving room temperature |
| CN115519234A (en) * | 2022-11-10 | 2022-12-27 | 中国船舶重工集团公司第七二五研究所 | Ultrasonic vibration assists melting welding system |
| CN115519234B (en) * | 2022-11-10 | 2024-08-23 | 中国船舶重工集团公司第七二五研究所 | Ultrasonic vibration auxiliary fusion welding system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104551289A (en) | Different-frequency multi-contact ultrasonic-assisted braze welding method | |
| CN104191057B (en) | A kind of preparation method of porous metal matrix bluk recombination brazing filler metal alloy soldered fitting | |
| CN101829824B (en) | Compound heating soldering method of precise part resistance heat and supersonic vibration | |
| CN109759741B (en) | Brazing powder for ultrasonic-assisted brazing and brazing method | |
| CN105965150B (en) | A kind of friction stir welding method between dissimilar metal plate | |
| CN102114561B (en) | Method of pre-copper-plated induction welding-brazing of aluminum-steel stud bolt | |
| CN102489813B (en) | Vacuum active brazing process of molybdenum-copper alloys and stainless steel | |
| CN107931840B (en) | Laser-induced monotectic and homogeneous reaction welding method for titanium-nickel heterojunction | |
| CN106271076A (en) | A kind of red copper method for laser welding | |
| CN114261100B (en) | Method for ultra-fast laser welding of transparent hard and brittle material and metal | |
| WO2015061295A1 (en) | Flux-less direct soldering by ultrasonic surface activation | |
| CN105541366B (en) | A kind of ceramic low-temp method for welding | |
| CN102528286A (en) | Welding method for alloy element controlled magnesium/steel | |
| CN105057873A (en) | Method for preparing CuW/Cu/CuCrZr integrated contact through electron beam welding | |
| CN105618885B (en) | A method of reinforced phase is formed by regulation and strengthens composite weld structural material | |
| CN112222595B (en) | Ultrasonic welding method for amorphous alloy and dissimilar metal and weldment fixing device | |
| WO2018176628A1 (en) | Ultrasound flux-free aluminium pipe brazing method and apparatus | |
| CN107297569B (en) | A kind of titanium copper dissimilar metal connector welding method | |
| WO2018036187A1 (en) | Non-contact heating tin brazing method for welding metal structure and hardware | |
| CN105522274A (en) | Friction welding method applied to soft stud-hard substrate | |
| CN115070189B (en) | Explosion welding preparation method of hollow runner | |
| CN105522246A (en) | Ultrasonic-assisted semi-solid welding method | |
| JP3588137B2 (en) | Metal material surface coating method | |
| CN208853924U (en) | A kind of Friction Stir Welding device | |
| CN103846541A (en) | Metal liquid-solid interface thermal extrusion welding method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
|
| RJ01 | Rejection of invention patent application after publication |