CN109207707A - The laser shock peening method of face of weld - Google Patents
The laser shock peening method of face of weld Download PDFInfo
- Publication number
- CN109207707A CN109207707A CN201810235851.2A CN201810235851A CN109207707A CN 109207707 A CN109207707 A CN 109207707A CN 201810235851 A CN201810235851 A CN 201810235851A CN 109207707 A CN109207707 A CN 109207707A
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- Prior art keywords
- laser
- weld
- face
- weld seam
- ripple
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- 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
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Optics & Photonics (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses the laser shock peening methods of face of weld of the invention, it is distributed according to the ripple of weld seam, using more laser beams are multi-direction converge by the way of to weld seam carry out without absorbed layer strengthen, the intensity of more laser beams is identical, is respectively acting on the different location point of weld seam.The present invention is converged mode using the multi-direction laser of multiple beam and is strengthened using no absorbed layer reiforcing laser impact technology according to the ripple direction of weld seam or distribution situation, improves the power density uniformity on the uneven surface in strengthening region.Directlying adopt laser impact intensified laser to the ablation layer on surface after laser impact intensified reduces power density progress laser cleaning, and the surface residual tensile stress for changing or removing ablation layer introducing is then perhaps mechanically polished using shot peening strengthening polishing.
Description
Technical field
The present invention relates to technical field of laser processing, more particularly to a kind of laser shock peening method of face of weld.
Background technique
Cladding, increasing material manufacturing, welding etc. lead to rough surface, and face of weld is since there are ripples on surface, and rough surface is not
It is flat, it is laser impact intensified there are two large problems, first is that it is laser impact intensified it is general using aluminium foil as absorbed layer, but face of weld
Often there are ripple, slag etc., cause aluminium foil, adhesive tape etc. to be pasted difficult, laser impact intensified absorbed layer in the process is easy breakage；Two
It is surface irregularity, there are the ripples of the surface of scalelike mark structure, welding also to lead to area, is equivalent to optical concealed surface
Laser impact intensified power is uneven, and digestion effect is unobvious, strengthens uniformity and is difficult to ensure.
Summary of the invention
In view of the technical drawbacks of the prior art, it is an object of the present invention to provide a kind of laser of face of weld to rush
Hit intensifying method.
The technical solution adopted to achieve the purpose of the present invention is:
A kind of laser shock peening method of face of weld is distributed, using the multi-direction remittance of more laser beams according to the ripple of weld seam
The mode of conjunction strengthen without absorbed layer to weld seam, and the intensity of more laser beams is identical, is respectively acting on weld seam not
Same location point.
The weld seam has obvious flow direction, top ridge line or bottom of the more laser beams according to the main ripple of weld seam
The laser beam of 2-4 beam different angle is set on the vertical plane of ditch line direction.
Including two beam laser beams, respectively with normal at 45-60 degree angle and corresponding to the two sides of ripple.
Including three beams of laser light beam, the two sides and top of ripple are respectively corresponded, laser beam and the normal of two sides are in
45-60 degree angle, the laser beam and normal at top are in 0 degree of angle.
Including four beam laser beams, the two sides of ripple are accordingly acted on two-by-two respectively, be 45 with normal angle
Or 75 degree.
The weld seam does not flow to significantly, and the laser beam is distributed in space cone.
The weld seam is out-of-flatness or the bead weld with ripple or undercut.
Further include the steps that being cleaned using more laser beams, the power of laser beam is close in cleaning step
Degree is reduced to original 1 to four/10ths 1/10th.
Shot peening strengthening polishing or mechanical polishing step.
Compared with prior art, the beneficial effects of the present invention are:
The present invention is using no absorbed layer reiforcing laser impact technology, according to the ripple direction of weld seam or distribution situation, using mostly light
The multi-direction laser of beam, which converges mode, to be strengthened, and the power density uniformity on the uneven surface in strengthening region is improved.Laser punching
It hits and directlys adopt laser impact intensified laser reduction power density progress laser cleaning after strengthening to the ablation layer on surface, so
Using shot peening strengthening polishing, perhaps mechanical polishing changes or removes the surface residual tensile stress that ablation layer introduces afterwards.
Detailed description of the invention
Fig. 1 show the schematic diagram of the laser shock peening method of face of weld of the invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
As shown, the laser shock peening method of face of weld of the invention, is distributed, using more according to the ripple of weld seam
The multi-direction mode converged of laser beam strengthen without absorbed layer to weld seam, and the intensity of more laser beams is identical, point
The different location point of weld seam is not acted on.
Coating is not needed when reinforcing, because rough surface is difficult to arrange that coating, thickness are difficult to keep unanimously, impact effect.
When strengthen without absorbed layer, various parameters are all as when having absorbed layer, and it is close to guarantee that multiple beam converges rear total power
Threshold value needed for degree all reaches reinforcing on invigoration effect face, such as 1~10GW/cm2, such as 3 GW/cm2Or 5 GW/cm2Or 6 GW/
cm2；7 GW/cm2, determined etc., specific value according to material.
Meanwhile after carrying out laser reinforcing, further include the steps that being cleaned using more laser beams, clear
The power density for washing laser beam in step is reduced to original 1 to four/10ths 1/10th.After carrying out laser cleaning,
Perhaps it carries out also carrying out shot peening strengthening polishing or mechanical polishing step after laser reinforcing.
The present invention is used using no absorbed layer reiforcing laser impact technology according to the ripple direction of weld seam or distribution situation
The multi-direction laser of multiple beam, which converges mode, to be strengthened, and the power density uniformity on the uneven surface in strengthening region is improved.Swash
It is clear that laser impact intensified laser reduction power density progress laser is directlyed adopt to the ablation layer on surface after light shock peening
It washes, then using shot peening strengthening polishing, perhaps mechanical polishing changes or remove the surface residual tensile stress that ablation layer introduces.
Wherein, for different welding procedures, there is different weld seams, weld seam as mentioned has obvious flow direction, and described is more
Laser beam is arranged according to the main Zone R of ripple, and main ripple flow direction, the approximation of standard Zone R, i.e., it is according to weld seam master
Want the laser beam that 2-4 beam different angle is set on the top ridge line or cunette line direction vertical plane of ripple.
Specifically, including two beam laser beams, at 45-60 degree angle and correspond to the two of ripple with normal respectively
Side.Alternatively, including three beams of laser light beam, the two sides and top of ripple are respectively corresponded, laser beam and the normal of two sides are in
45-60 degree angle, the laser beam and normal at top are in that 0 degree of angle corresponds to two-by-two respectively alternatively, including four beam laser beams
Ground acts on the two sides of ripple, is 45 or 75 degree with normal angle.
Wherein, laser shock method of the invention is particularly suitable for out-of-flatness, has the bead weld of ripple and undercut, mainly
Ripple refers to the ripple for occupying significant amounts, and the equally distributed multiple laser in corresponding vertical plane can be realized uniformly substantially
Distribution, and weld seam is that different welding procedures generate, corresponding reinforcing parameter needs to adapt to the shape of ripple and sets herein
It is fixed.
Meanwhile if the weld seam does not flow to significantly, the laser beam is in space cone distribution such as space
The distribution of four face cone of right angle, is equally able to achieve above-mentioned effect.
In conclusion the present invention uses the laser shock peening method without absorbed layer, directly face of weld is strengthened,
Reinforcing converges mode using the multi-direction laser of multiple beam and is strengthened, and the power density for improving the uneven surface in strengthening region is equal
Even property；Reduce because rough surface injustice cause absorbed layer damaging problem and strengthen homogeneity question, after reinforcing using polishing or
The ablation layer of person's laser cleaning face of weld, can also direct material blast cleaning technology, it is strong to remove no absorbed layer laser-impact
Change formed oxidation film, behind can also increase the conventional surfaces intensifying method such as shot-peening eliminate laser ablatable layer caused by shallow-layer it is residual
Remaining tensile stress.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of laser shock peening method of face of weld, which is characterized in that be distributed according to the ripple of weld seam, using more laser
The multi-direction mode converged of light beam strengthen without absorbed layer to weld seam, and the intensity of more laser beams is identical, makees respectively
Used in the different location point of weld seam.
2. the laser shock peening method of face of weld as described in claim 1, which is characterized in that the weld seam has bright
Aobvious flow direction, more laser beams are according to being arranged 2-4 on the top ridge line or cunette line direction vertical plane of the main ripple of weld seam
The laser beam of beam different angle.
3. the laser shock peening method of face of weld as claimed in claim 2, which is characterized in that including two beam laser lights
Beam, respectively with normal at 45-60 degree angle and corresponding to the two sides of ripple.
4. the laser shock peening method of face of weld as claimed in claim 2, which is characterized in that including three beams of laser light
Beam, respectively corresponds the two sides and top of ripple, and the laser beam and normal of two sides are in 45-60 degree angle, the laser at top
Light beam and normal are in 0 degree of angle.
5. the laser shock peening method of face of weld as claimed in claim 2, which is characterized in that including four beam laser lights
Beam accordingly acts on the two sides of ripple two-by-two respectively, is 45 or 75 degree with normal angle.
6. the laser shock peening method of face of weld as described in claim 1, which is characterized in that the weld seam is not bright
Aobvious flow direction, the laser beam are distributed in space cone.
7. the laser shock peening method of face of weld as described in claim 1, which is characterized in that the weld seam is injustice
Whole or bead weld with ripple or undercut.
8. the laser shock peening method of face of weld as described in claim 1, which is characterized in that further include using described
More laser beams the step of being cleaned, the power density of laser beam is reduced to original 1/10th to arrive in cleaning step
1/40th.
9. the laser shock peening method of face of weld as claimed in claim 1 or 8, which is characterized in that shot peening strengthening polishing
Or mechanical polishing step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810235851.2A CN109207707A (en) | 2018-03-21 | 2018-03-21 | The laser shock peening method of face of weld |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810235851.2A CN109207707A (en) | 2018-03-21 | 2018-03-21 | The laser shock peening method of face of weld |
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| CN109207707A true CN109207707A (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810235851.2A Pending CN109207707A (en) | 2018-03-21 | 2018-03-21 | The laser shock peening method of face of weld |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109926403A (en) * | 2019-03-28 | 2019-06-25 | 中国人民解放军陆军装甲兵学院 | A method of it reducing high power pulse laser and cleans metal surface residual stress |
| CN110000472A (en) * | 2019-02-26 | 2019-07-12 | 武汉力神动力电池系统科技有限公司 | A kind of method for laser welding of power battery module aluminium alloy end plate and side plate |
| CN112609066A (en) * | 2020-11-27 | 2021-04-06 | 山东大学 | Curved surface uniform strengthening method based on single-point double oblique incidence laser impact |
| CN113930607A (en) * | 2021-09-07 | 2022-01-14 | 中国科学院宁波材料技术与工程研究所 | Self-adaptive distributed laser shock peening processing system and method |
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| US20040003874A1 (en) * | 2002-07-03 | 2004-01-08 | Thk Co., Ltd. | Hardening method and apparatus utilizing laser beams |
| US20080029499A1 (en) * | 2006-08-01 | 2008-02-07 | Sumitomo Electric Industries, Ltd. | Laser processing method and laser processing apparatus |
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| CN103305665A (en) * | 2013-06-07 | 2013-09-18 | 江苏大学 | Method for strengthening welding line by laser temperature shock free of absorption layer |
| CN105108346A (en) * | 2015-09-22 | 2015-12-02 | 武汉金顿激光科技有限公司 | Stainless steel weld joint and surrounding impurity treatment process |
| CN105382409A (en) * | 2015-12-25 | 2016-03-09 | 中国航空工业集团公司北京航空制造工程研究所 | Laser shock processing method of thin plate welding structure |
| US20160237521A1 (en) * | 2013-10-31 | 2016-08-18 | Ningbo Institute Of Materials Technology & Engineering, Chinese Academy Of Sciences | Laser Shock Peening Apparatus for Surface of Workpiece, and Laser Shock Peening Method |
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2031793A (en) * | 1978-09-21 | 1980-04-30 | Windmoeller & Hoelscher | Method of cutting and welding plastics films with laser beams |
| JPS6160290A (en) * | 1984-08-31 | 1986-03-27 | Toyota Motor Corp | Work processing method using laser |
| US5735044A (en) * | 1995-12-12 | 1998-04-07 | General Electric Company | Laser shock peening for gas turbine engine weld repair |
| US20040003874A1 (en) * | 2002-07-03 | 2004-01-08 | Thk Co., Ltd. | Hardening method and apparatus utilizing laser beams |
| US20080029499A1 (en) * | 2006-08-01 | 2008-02-07 | Sumitomo Electric Industries, Ltd. | Laser processing method and laser processing apparatus |
| JP2009235490A (en) * | 2008-03-27 | 2009-10-15 | Hitachi Constr Mach Co Ltd | Laser heat-treatment apparatus |
| CN103305665A (en) * | 2013-06-07 | 2013-09-18 | 江苏大学 | Method for strengthening welding line by laser temperature shock free of absorption layer |
| US20160237521A1 (en) * | 2013-10-31 | 2016-08-18 | Ningbo Institute Of Materials Technology & Engineering, Chinese Academy Of Sciences | Laser Shock Peening Apparatus for Surface of Workpiece, and Laser Shock Peening Method |
| CN105108346A (en) * | 2015-09-22 | 2015-12-02 | 武汉金顿激光科技有限公司 | Stainless steel weld joint and surrounding impurity treatment process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000472A (en) * | 2019-02-26 | 2019-07-12 | 武汉力神动力电池系统科技有限公司 | A kind of method for laser welding of power battery module aluminium alloy end plate and side plate |
| CN109926403A (en) * | 2019-03-28 | 2019-06-25 | 中国人民解放军陆军装甲兵学院 | A method of it reducing high power pulse laser and cleans metal surface residual stress |
| CN112609066A (en) * | 2020-11-27 | 2021-04-06 | 山东大学 | Curved surface uniform strengthening method based on single-point double oblique incidence laser impact |
| CN113930607A (en) * | 2021-09-07 | 2022-01-14 | 中国科学院宁波材料技术与工程研究所 | Self-adaptive distributed laser shock peening processing system and method |
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Application publication date: 20190115 |