CN109666788A - Regulate and control the laser impact processing method of titanium alloy plate welding point residual stress - Google Patents
Regulate and control the laser impact processing method of titanium alloy plate welding point residual stress Download PDFInfo
- Publication number
- CN109666788A CN109666788A CN201910153197.5A CN201910153197A CN109666788A CN 109666788 A CN109666788 A CN 109666788A CN 201910153197 A CN201910153197 A CN 201910153197A CN 109666788 A CN109666788 A CN 109666788A
- Authority
- CN
- China
- Prior art keywords
- laser
- titanium alloy
- alloy plate
- welding point
- plate welding
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
- C21D10/005—Modifying the physical properties by methods other than heat treatment or deformation by laser shock processing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laser Beam Processing (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of laser impact processing methods of regulation titanium alloy plate welding point residual stress, this method successively carries out laser-impact processing to the tow sides of titanium alloy plate welding point, the direction of laser-impact processing is vertical with the plate face at titanium alloy plate welding point position, the plate face of titanium alloy plate welding point position and titanium alloy plate is in same plane, during laser-impact processing, fall in LASER SPECKLE on the weld seam upper surface at titanium alloy plate welding point position, and it is located at the center of LASER SPECKLE in weld-fusion line, move LASER SPECKLE along the serpentine-like line direction of axis of a weld.The present invention is by adjusting laser-impact processing starting position and route, compression is converted by the residual tension at titanium alloy plate welding point position, it ensure that the consistent of the positive and negative surface stress of titanium alloy plate welding point position weld seam, reduce the difference of the residual stress in the different zones of welding point position.
Description
Technical field
The invention belongs to titanic alloy machining technical fields, and in particular to a kind of regulation titanium alloy plate welding point remnants are answered
The laser impact processing method of power.
Background technique
Welding is a kind of material connection type being widely adopted, and the development and progress of welding technique can not only navigate to aviation
Its structural member mitigates weight, while can also provide safeguard for the raising of its performance.During titanium alloy welding, due to heated and cold
The factors such as uneven lead to the generation of welding point position residual-tensile stress, will lead to stress concentration phenomenon, so as to cause
The variation of structural behaviour and service life, it be cause structural fatigue to destroy, fracture, stress corrosion an important factor for, therefore must
Palpus butt-welding fitting carries out after welding treatment to eliminate its residual-tensile stress.
Conventionally employed butt-welding fitting carries out the method for post weld heat treatment to eliminate stress, however heat treatment efficiency is low, energy consumption is big,
It is limited by weldment outer dimension and shape, is difficult to especially for some large size special-shaped structural members using heat treatment simultaneously
Method carry out eliminate stress processing.Laser-impact processing is a kind of novel metal material surface intensive treatment technology, is benefit
It is absorbed through restraint layer irradiation on the absorbed layer of workpiece surface with the laser beam with high power density and short pulse width
Layer vaporization forms the plasma of high temperature, high pressure, and Cathode plasma explosion suffers restraints limitation, so that plasma pressure is further
It increases, until plasma explosion generates the very high impact wave impact workpiece surface of intensity and internally propagates, workpiece surface is sent out
Raw plastic deformation, forms the residual compressive stress of high-amplitude, to significantly improve the hardness of material, extends its fatigue life, principle
As shown in Figure 1.It is applied to titanium alloy weldment, benefit for laser shock processing as the processing method that a kind of postwelding eliminates stress
Regulate and control the residual stress state and its distribution of welding position with the high-amplitude residual compressive stress formed during laser-impact, it can be with
The shortcomings that overcoming prior heat treatment method is a kind of efficiently feasible process route.
Application publication number is that the patent of invention of CN103014248A discloses a kind of laser impact intensified welding point
Welded tube, using the welding point surface of pulsed laser irradiation welded tube, so that plasticity occurs for welding point surface microhardness stress
Deformation, thus the structure refinement of welded tube, mechanical property is improved；But the invention is directed to the welding point of welded tube, weld seam shape
Formula is circular arc weld seam.Authorization Notice No. is that the patent of invention of CN104152896B discloses a kind of nanometer of reparation particle and laser
Welding angle surface modifying method makes circular light spot be converted into square focus spot using beam shaping technology under shock peening collective effect
Laser beam to filled with SiC particulate welding angle carry out it is laser impact intensified, induction welding angle surface formed high-amplitude residual compressive stress and
Crystal grain is refined, laser-impact processing hot spot utilization rate is improved and obtains more even curface；But the invention in welding angle by filling out
It fills SiC particulate and forms transition circle cambered surface to solve " plasma shield " effect of laser cladding layer welding angle, to laser-impact energy
The requirement of amount is larger, and can not measure true residual stress state at welding angle.Authorization Notice No. is the hair of CN105382409B
Bright patent discloses a kind of laser shock peening method of plated construction, using subregion intensifying method, by plate sheet welding knot
The welding point of structure is divided into several strengthening regions from weld seam one end to the other end along fusion length direction, then successively to each strong
Change region and carry out positive and negative surface strengthening, reduces welding structure deformation, reduction is because of strengthening surface residual compressive stress first caused by deforming
Attenuation degree；But the invention is directed to the welded welding point of large-scale sheet, and fusion length is long, the thin (embodiment of thickness
In be 2mm), subregion intensifying method is cumbersome, and the starting of adjacent area impact point location is more difficult, and whole process efficiency is lower, can grasp
The property made is not strong.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of regulation titanium alloy
The laser impact processing method of plate welding point residual stress.This method is by adjusting laser-impact processing starting position and road
Line makes welding point position near surface generate a degree of plastic deformation, by titanium alloy plate because in electron beam welding process
Nonuniform heating and cooling caused residual tension are converted into compression, ensure that titanium alloy plate welding point position weld seam
Positive and negative surface stress it is consistent, reduce the difference of the residual tension in the different zones of welding point position.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: regulation titanium alloy plate welding point is remaining
The laser impact processing method of stress, which is characterized in that this method to the tow sides of titanium alloy plate welding point successively into
The direction of the processing of row laser-impact, the laser-impact processing is vertical with the plate face at titanium alloy plate welding point position, and titanium closes
The plate face of golden plate material welding point position and titanium alloy plate is in same plane, during the laser-impact processing, first
It falls in LASER SPECKLE on the weld seam upper surface at titanium alloy plate welding point position, and the center of LASER SPECKLE is made to be located at weld seam
In melt run, moves LASER SPECKLE along the serpentine-like line direction of axis of a weld and carry out laser-impact processing, it is described to swash
During light shock treatment, at titanium alloy plate welding point position using black tape as energy-absorbing layer, deionized water is made
For restraint layer.
The present invention using laser impact processing method regulate and control titanium alloy plate welding point residual stress, first by adjusting
The position of LASER SPECKLE and weld seam has been accurately positioned the laser-impact processing starting position at titanium alloy plate welding point, so
Afterwards using the route moved along the serpentine-like line direction of axis of a weld as laser-impact processing, i.e. the laser-impact is handled
Beginning position is the heat-affected zone of weld seam, and assault route is in parallel and bead direction, due in fusion length direction seam organization
Include different microstructure forms, while grain size differs greatly, is rushed in laser-impact treatment process due to coordinating
The residual stress hitting deformation and generating can be bigger, and impact effect is more significant.Meanwhile it being used at titanium alloy plate welding point position
Black tape can fully absorb laser energy and (ns magnitude) forms a high temperature height in a very short period of time as energy-absorbing layer
The plasmasphere of pressure, using deionized water as restraint layer, explosive action of plasma is in titanium under the action of restraint layer
Sheet alloy welding point surface is simultaneously internally propagated, and welding point position near surface is made to generate a degree of plastic deformation,
Can significantly reduce titanium alloy plate because nonuniform heating in electron beam welding process and it is cooling caused by residual tension；Separately
Outside, since the tow sides to titanium alloy plate welding point successively carry out laser-impact processing, and the side of laser-impact processing
To, the plate face at titanium alloy plate welding point position and titanium alloy plate vertical with the plate face at titanium alloy plate welding point position
In same plane, it is consistent with route to ensure that laser-impact position, to ensure that titanium alloy plate welding point position
The positive and negative surface stress of weld seam it is consistent, reduce the difference of the residual stress in the different zones of welding point position.
The laser impact processing method of above-mentioned regulation titanium alloy plate welding point residual stress, which is characterized in that institute
The parameter for stating laser-impact processing includes laser energy, pulse width, spot size and hot spot overlapping rate, and the laser energy is
3J~5J, pulsewidth are 10ns~20ns, and spot diameter 2.6mm, hot spot overlapping rate is 50%.It is rushed using above-mentioned preferred laser
The parameter for hitting processing is conducive to control the plastic deformation degree of titanium alloy plate welding point position face of weld, in welding point
Microscopic structure in form a large amount of dislocation microstructure, to form certain residual compressive stress in face of weld, to offset weldering
Residual tension in termination process realizes the regulation to titanium alloy plate welding point residual stress.
The laser impact processing method of above-mentioned regulation titanium alloy plate welding point residual stress, which is characterized in that institute
State titanium alloy plate with a thickness of 3mm~8mm.It will not be deformed at the titanium alloy plate welding point of above-mentioned thickness range,
The residual stress formed after single side impact is stablized, and reverse side impacts the intensity of residual stresses and distribution that will not influence first shock surface.
The laser impact processing method of above-mentioned regulation titanium alloy plate welding point residual stress, which is characterized in that institute
Welding manner that titanium alloy plate welding point position uses is stated as electron beam welding.Method of the invention can be applied to electronics
The titanium alloy plate welding point position of beam welding preparation, use scope is wide, and application value is big.
The laser impact processing method of above-mentioned regulation titanium alloy plate welding point residual stress, which is characterized in that institute
Stating laser-impact number of processing is 1 time.Present invention preferably employs the i.e. controllable titanium alloy plate welding of 1 laser-impact processing
Connector residual stress, it is easy to operate, it further reduced processing cost, expand the application range of the method for the present invention.
Compared with the prior art, the present invention has the following advantages:
1, the present invention is by adjusting the LASER SPECKLE of laser-impact processing and the position of weld seam, and uses along Weld pipe mill
The serpentine-like line direction of line moves the route handled as laser-impact, the laser being accurately positioned at titanium alloy plate welding point
Shock treatment originates position, so that welding point position near surface is generated a degree of plastic deformation, by titanium alloy plate because of electricity
Nonuniform heating and cooling caused residual tension are converted into compression in beamlet welding process, ensure that titanium alloy plate welds
The consistent of the positive and negative surface stress of joint area weld seam is connect, the residual stress in the different zones of welding point position is reduced
Difference.
2, the laser-impact processing that the present invention uses avoids to be cold worked and not contacting titanium alloy plate welding point surface
High-temperature oxydation or pollution are caused to titanium alloy plate, to ensure that titanium alloy plate surface quality, high-efficiency environment friendly.
3, simple process of the invention, operation are easy, and use scope is wide.
Technical solution of the present invention is described in further detail below by drawings and examples.
Detailed description of the invention
Fig. 1 is the schematic illustration of laser-impact processing.
Fig. 2 is the impact initial position schematic diagram that titanium alloy plate welding point of the present invention carries out laser-impact processing.
Fig. 3 is the route schematic diagram that titanium alloy plate welding point of the present invention carries out laser-impact processing.
Fig. 4 is laser-impact before and after the processing residual in titanium alloy plate electro-beam welding joint position in the embodiment of the present invention 1
Residue stress comparison.
Fig. 5 is laser-impact before and after the processing residual in titanium alloy plate electro-beam welding joint position in the embodiment of the present invention 2
Residue stress comparison.
Fig. 6 is laser-impact before and after the processing residual in titanium alloy plate electro-beam welding joint position in the embodiment of the present invention 3
Residue stress comparison.
Specific embodiment
Embodiment 1
The laser impact processing method of the present embodiment are as follows: electron beam welding will be used with a thickness of the titanium alloy plate of 3mm, made
The plate face of titanium alloy plate welding point position and titanium alloy plate is in same plane, using black tape as energy absorption
Layer, deionized water successively carry out laser-impact processing, laser as restraint layer, to the tow sides of titanium alloy plate welding point
The direction of shock treatment is vertical with the plate face at titanium alloy plate welding point position, during the laser-impact processing, first
It falls in LASER SPECKLE on the weld seam upper surface at titanium alloy plate welding point position, and the center of LASER SPECKLE is made to be located at weld seam
In melt run, carried out at laser-impact as shown in Fig. 2, moving LASER SPECKLE along the serpentine-like line direction of axis of a weld
Reason, as shown in figure 3, the laser energy of laser-impact processing is 4J, pulse duration range 15ns, spot diameter 2.6mm, hot spot
Overlapping rate is 50%, and the laser-impact number of processing is 1 time.
Using X-ray diffractometer to the present embodiment titanium alloy plate electro-beam welding joint position laser-impact before and after the processing
Residual stress measure, as a result as shown in figure 4, the present embodiment titanium alloy sheet before laser-impact is handled as seen from Figure 4
Material electro-beam welding joint position is in tensile stress state, and melt run internal stress is 160MPa~215MPa, is handled through laser-impact
Titanium alloy plate electro-beam welding joint position is in compressive stress state afterwards, and melt run internal stress is -660MPa~-495MPa range
It is interior, and entire welding position residual stress difference reduces, and illustrates to reduce titanium alloy plate welding using laser impact processing method
The significant effect of connector residual stress.
Embodiment 2
The laser impact processing method of the present embodiment are as follows: electron beam welding will be used with a thickness of the titanium alloy plate of 8mm, made
The plate face of titanium alloy plate welding point position and titanium alloy plate is in same plane, using black tape as energy absorption
Layer, deionized water successively carry out laser-impact processing, laser as restraint layer, to the tow sides of titanium alloy plate welding point
The direction of shock treatment is vertical with the plate face at titanium alloy plate welding point position, during the laser-impact processing, first
It falls in LASER SPECKLE on the weld seam upper surface at titanium alloy plate welding point position, and the center of LASER SPECKLE is made to be located at weld seam
In melt run, carried out at laser-impact as shown in Fig. 2, moving LASER SPECKLE along the serpentine-like line direction of axis of a weld
Reason, as shown in figure 3, the laser energy of laser-impact processing is 5J, pulse duration range 10ns, spot diameter 2.6mm, hot spot
Overlapping rate is 50%, and the laser-impact number of processing is 1 time.
Using X-ray diffractometer to the present embodiment titanium alloy plate electro-beam welding joint position laser-impact before and after the processing
Residual stress measure, as a result as shown in figure 5, the present embodiment titanium alloy sheet before laser-impact is handled as seen from Figure 5
Material electro-beam welding joint position is in tensile stress state, and melt run internal stress is 260MPa~310MPa, is handled through laser-impact
Titanium alloy plate electro-beam welding joint position is in compressive stress state afterwards, and melt run internal stress is -500MPa~-390MPa range
It is interior, and entire welding position residual stress difference reduces, and illustrates to reduce titanium alloy plate welding using laser impact processing method
The significant effect of connector residual stress.
Embodiment 3
The laser impact processing method of the present embodiment are as follows: electron beam welding will be used with a thickness of the titanium alloy plate of 4mm, made
The plate face of titanium alloy plate welding point position and titanium alloy plate is in same plane, using black tape as energy absorption
Layer, deionized water successively carry out laser-impact processing, laser as restraint layer, to the tow sides of titanium alloy plate welding point
The direction of shock treatment is vertical with the plate face at titanium alloy plate welding point position, during the laser-impact processing, first
It falls in LASER SPECKLE on the weld seam upper surface at titanium alloy plate welding point position, and the center of LASER SPECKLE is made to be located at weld seam
In melt run, carried out at laser-impact as shown in Fig. 2, moving LASER SPECKLE along the serpentine-like line direction of axis of a weld
Reason, as shown in figure 3, the laser energy of laser-impact processing is 3J, pulse duration range 20ns, spot diameter 2.6mm, hot spot
Overlapping rate is 50%, and the laser-impact number of processing is 1 time.
Using X-ray diffractometer to the present embodiment titanium alloy plate electro-beam welding joint position laser-impact before and after the processing
Residual stress measure, as a result as shown in fig. 6, the present embodiment titanium alloy sheet before laser-impact is handled as seen from Figure 6
Material electro-beam welding joint position is in tensile stress state, and melt run internal stress is 200MPa~254MPa, is handled through laser-impact
Titanium alloy plate electro-beam welding joint position is in compressive stress state afterwards, and melt run internal stress is -360MPa~-280MPa range
It is interior, and entire welding position residual stress difference reduces, and illustrates to reduce titanium alloy plate welding using laser impact processing method
The significant effect of connector residual stress.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way.It is all according to invention skill
Art any simple modification, change and equivalence change substantially to the above embodiments, still fall within technical solution of the present invention
Protection scope in.
Claims (5)
1. regulating and controlling the laser impact processing method of titanium alloy plate welding point residual stress, which is characterized in that this method is to titanium
The tow sides of sheet alloy welding point successively carry out laser-impact processing, the direction of the laser-impact processing and titanium alloy
The plate face at plate welding point position is vertical, and the plate face of titanium alloy plate welding point position and titanium alloy plate is in same flat
Face first makes LASER SPECKLE fall in the weld seam upper end at titanium alloy plate welding point position during the laser-impact processing
On face, and it is located at the center of LASER SPECKLE in weld-fusion line, then makes LASER SPECKLE along the serpentine-like line of axis of a weld
Direction, which moves, carries out laser-impact processing, in the laser-impact treatment process, uses at titanium alloy plate welding point position
Black tape is as energy-absorbing layer, and deionized water is as restraint layer.
2. the laser impact processing method of regulation titanium alloy plate welding point residual stress according to claim 1,
It is characterized in that, the parameter of the laser-impact processing includes laser energy, pulse width, spot size and hot spot overlapping rate, institute
Stating laser energy is 3J~5J, and pulsewidth is 10ns~20ns, and spot diameter 2.6mm, hot spot overlapping rate is 50%.
3. the laser impact processing method of regulation titanium alloy plate welding point residual stress according to claim 1,
Be characterized in that, the titanium alloy plate with a thickness of 3mm~8mm.
4. the laser impact processing method of regulation titanium alloy plate welding point residual stress according to claim 1,
It is characterized in that, the welding manner that titanium alloy plate welding point position uses is electron beam welding.
5. the laser impact processing method of regulation titanium alloy plate welding point residual stress according to claim 1,
It is characterized in that, the laser-impact number of processing is 1 time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910153197.5A CN109666788A (en) | 2019-02-28 | 2019-02-28 | Regulate and control the laser impact processing method of titanium alloy plate welding point residual stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910153197.5A CN109666788A (en) | 2019-02-28 | 2019-02-28 | Regulate and control the laser impact processing method of titanium alloy plate welding point residual stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109666788A true CN109666788A (en) | 2019-04-23 |
Family
ID=66151499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910153197.5A Pending CN109666788A (en) | 2019-02-28 | 2019-02-28 | Regulate and control the laser impact processing method of titanium alloy plate welding point residual stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109666788A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111270068A (en) * | 2020-04-16 | 2020-06-12 | 西安天瑞达光电技术股份有限公司 | Surface strengthening process for prolonging fatigue life of intersecting line position of inner cavity of pump head body of fracturing pump |
| CN111558777A (en) * | 2020-05-14 | 2020-08-21 | 东华大学 | Laser shock based friction stir welding joint strengthening method |
| CN115673613A (en) * | 2022-10-21 | 2023-02-03 | 北京理工大学 | Control device, system and method for welding residual stress of titanium alloy plate component |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834659A (en) * | 2017-01-25 | 2017-06-13 | 中国人民解放军空军工程大学 | The method that ps pulsed laser and ns pulsed laser impacts stainless steel welded joint stress corrosion resistant |
-
2019
- 2019-02-28 CN CN201910153197.5A patent/CN109666788A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834659A (en) * | 2017-01-25 | 2017-06-13 | 中国人民解放军空军工程大学 | The method that ps pulsed laser and ns pulsed laser impacts stainless steel welded joint stress corrosion resistant |
Non-Patent Citations (1)
| Title |
|---|
| 黄潇: ""激光冲击强化对TC4单面修饰激光焊接接头疲劳性能影响研究"", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111270068A (en) * | 2020-04-16 | 2020-06-12 | 西安天瑞达光电技术股份有限公司 | Surface strengthening process for prolonging fatigue life of intersecting line position of inner cavity of pump head body of fracturing pump |
| CN111558777A (en) * | 2020-05-14 | 2020-08-21 | 东华大学 | Laser shock based friction stir welding joint strengthening method |
| CN115673613A (en) * | 2022-10-21 | 2023-02-03 | 北京理工大学 | Control device, system and method for welding residual stress of titanium alloy plate component |
| CN115673613B (en) * | 2022-10-21 | 2024-06-18 | 北京理工大学 | Control device, system and method for welding residual stress of titanium alloy plate members |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109666788A (en) | Regulate and control the laser impact processing method of titanium alloy plate welding point residual stress | |
| CN102886606B (en) | A kind of method and apparatus of laser remanufacturing sheet metal weldment | |
| Liu et al. | A new laser-arc hybrid welding technique based on energy conservation | |
| CN103192187A (en) | Laser high-frequency alternating-current pulse tungsten inert gas (TIG) hybrid welding process | |
| CN112518159B (en) | Surface treatment and welding device and method for metal workpiece | |
| CN104400225B (en) | A kind of Ti2AlNb intermetallic compound method for laser welding | |
| CN104227220B (en) | A kind of large-area laser impact spot welding method based on nano-particle reinforcement and device | |
| CN101347870A (en) | Laser-ultrasmall current GMA compound heat power supply welding method | |
| CN102409157A (en) | Intensifying method by hollow laser | |
| CN103305665A (en) | Method for strengthening welding line by laser temperature shock free of absorption layer | |
| CN110512071A (en) | A kind of impact of hollow laser and supersonic synergic strengthen antifatigue device and processing method | |
| Liu et al. | Tensile resistance, microstructures of intermetallic compounds, and fracture modes of welded steel/aluminum joints produced using laser lap welding | |
| CN104384718A (en) | Double beam pulse laser welding method for Ti2A1Nb-based intermetallic compound | |
| CN104028892A (en) | Laser welding method applicable to aluminum alloy | |
| CN103526008A (en) | Laser shock wave reinforcing method and apparatus | |
| JP3899007B2 (en) | Method for improving fatigue strength of lap fillet welded joints | |
| CN113649694B (en) | Welding method for cylindrical battery current collector | |
| CN105171240A (en) | Lapping full-penetration laser welding method for stainless steel heat exchange plates | |
| CN111843124B (en) | Metal welding method and system based on laser shock | |
| CN104842081B (en) | Thick plate welding method and welding fixture | |
| CN109834388A (en) | The laser forging complex welding method and device of low stress Light deformation as-forged microstructure | |
| Jia et al. | Recent progress in laser shock peening: Mechanism, laser systems and development prospects | |
| Ma et al. | Effect of different pulse shapes on the laser welding of aluminum and copper | |
| CN103343189B (en) | Method for combinatorially reinforcing thick plate through laser shock | |
| CN111618305B (en) | Ultrasonic impact forging device |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190423 |