CN103388056A - Method for improving performances of outer cylinder wall of cylindrical pressure vessel by high-energy laser - Google Patents
Method for improving performances of outer cylinder wall of cylindrical pressure vessel by high-energy laser Download PDFInfo
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- CN103388056A CN103388056A CN201310302197XA CN201310302197A CN103388056A CN 103388056 A CN103388056 A CN 103388056A CN 201310302197X A CN201310302197X A CN 201310302197XA CN 201310302197 A CN201310302197 A CN 201310302197A CN 103388056 A CN103388056 A CN 103388056A
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Abstract
The invention discloses a method for improving performances of an outer cylinder wall of a cylindrical pressure vessel by high-energy laser. The method comprises the following steps of 1, carrying out pre-treatment on the surface of the cylindrical pressure, and 2, carrying out laser hardening of the surface of the cylindrical pressure by high-energy laser so that hardening bands are formed on the surface of the cylindrical pressure at uniform intervals. Through spiral stripe-shaped laser hardening of the outer cylinder wall of the cylindrical pressure vessel, the outer cylinder wall of the cylindrical pressure vessel has higher strength, a better anti-compression capability and a better anti-stress capability, can prolong a service life of the cylindrical pressure vessel, and guarantees design performance requirements without appearance and design shape change. Compared with the traditional reinforcement method, the method provided by the invention greatly reduces a production cost.
Description
Technical field
A kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser, belong to by superlaser and improve performance field, metallic surface.
Background technology
Laser has high brightness, high directivity, high monochromaticity, high coherency's characteristics, just by increasing field, is used now, and laser hardening is exactly a kind of in process for treating surface.That summarizes says, the principle of laser hardening is utilized high energy laser beam irradiation metal material surface exactly, the phase transformation of surface ferrous materials generation austenitizing, treat laser beam through after, the material surface heat is absorbed by material inside, surface temperature reduces rapidly, and one deck martensitic structure forms on surface, i.e. Laser hardening case.Laser hardening can greatly change the metallicity of this key position, as hardness, wear resistance, thermotolerance, erosion resistance etc.
Pressurized vessel refers to be used for completing the production processes such as reaction, mass transfer, heat transfer, separation and storage in industrial production, and can bear the encloses container of pressure load (internal force, external force).So, all very strict to manufacturing and the checkout procedure of pressurized vessel.Traditional pressurized vessel is generally by Q245R, Q345R, 16MnR, aluminium alloy, titanium alloy and austenitic stainless steel material, as 304, the manufacturing such as 316L forms.
The method of traditional raising pressurized vessel wall of the outer-rotor performance is to use stiffening web on its surface, under the condition that does not strengthen product wall thickness, strengthen intensity and the rigidity of pressurized vessel, can overcome the twisted distortion that unbalanced stress that pressurized vessel brings because of the wall thickness difference causes.Because the pressurized vessel volume is large, procedure of processing is complicated, not easy to operate, stiffening web often can not well be used in the pressurized vessel wall of the outer-rotor, and involves great expense, and has greatly increased production cost.
Summary of the invention
The object of the present invention is to provide a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser, by the pressurized vessel wall of the outer-rotor is carried out laser hardening, make the pressurized vessel wall of the outer-rotor have higher intensity, larger anti-pressure ability and anti-stress ability, greatly increased the work-ing life of pressurized vessel, in the situation that outward appearance and design shape are constant, guarantee its design performance requirement, compared traditional stiffening web method, greatly reduced production cost.
In order to address the above problem, technical scheme provided by the invention is: a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser comprises:
Surface Pressure Vessel is carried out pre-treatment
Use superlaser to carry out laser hardening on pressurized vessel wall of the outer-rotor surface, make the pressurized vessel wall of the outer-rotor form a small-scale hardenability band, superlaser is around the pressurized vessel wall of the outer-rotor formula translational motion of spinning, and the laser walking manner adopts the single track travelling.
, according to the analysis of pressurized vessel wall of the outer-rotor shape, adopt the processing trend of industrial PC laser beam in above-mentioned step b method, drive simultaneously servomotor and realize location.
In above-mentioned step b method, the laser apparatus walking manner is to get a starting point at pressurized vessel wall of the outer-rotor edge, along the wall of the outer-rotor translational motion of spinning, when laser apparatus is walked another edge of pressurized vessel wall of the outer-rotor, laser is got back to starting point one side, be offset 2-5mm to the right and move to the opposite side edge again, repeat above-mentioned motion.
Small-scale hardenability band in above-mentioned step b method, its width is about 100mm.
Above-mentioned laser apparatus is optical fiber laser, laser output power 3000W, and optical maser wavelength is 1.06 μ m, and travelling speed is 5-12mm/s, and sweep length is 3-5mm, and the overlapping rate of laser is 30-50%, the angle of cut of laser and Surface Pressure Vessel is 84 °-87 °.
Above-mentioned laser apparatus is carbon dioxide laser, laser output power 4000W, and optical maser wavelength is 10.6 μ m, and travelling speed is 5-12mm/s, and sweep length is 3-5mm, and the angle of cut of laser and Surface Pressure Vessel is 84 °-87 °.
Above-mentioned thin hardened layer is 0.5-1mm.
Pre-treatment in above-mentioned step a comprises removes pressurized vessel wall of the outer-rotor surface rusty stain and impurity etc.
After adopting technique scheme, the invention has the beneficial effects as follows:
1) by the hardened layer after laser hardening of the present invention, by metallurgical analysis, wall of the outer-rotor has good internal organizational structure,, without shrinkage cavity, bubble, defects i.e.cracks, has greatly changed its surface structure performance.
2) making pressurized vessel wall of the outer-rotor surface have higher intensity and larger anti-pressure ability, greatly increased its work-ing life, is 3-5 times before hardening treatment.
3), by the pressurized vessel after laser hardening of the present invention, can guarantee to guarantee its performance requriements in the constant situation of outward appearance and design conditions.
4) can replace traditional stiffening web method, greatly reduce production cost.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the pressurized vessel schematic diagram, wherein identifies 1 laser motion direction.
Fig. 2 is the pressurized vessel stretch-out view, wherein identifies 1 laser motion direction, 2 hardenability bands.
Embodiment:
The present invention is described in further detail below by specific embodiment.
Surface Pressure Vessel is carried out pre-treatment, remove surperficial impurity and rusty stain etc.Removing the method for iron rust can use rust remover and rubber paper to carry out wiping to Surface Pressure Vessel.Adopt the processing trend of industrial PC laser beam, drive simultaneously servomotor and realize location.use the optical fiber laser of 3000W to carry out laser hardening on pressurized vessel wall of the outer-rotor surface, optical maser wavelength is 1.06 μ m, the laser travelling speed is 5mm/s, the laser scanning width is 3mm, the laser lap rate is 30%, superlaser shines Surface Pressure Vessel, the angle of cut of laser and Surface Pressure Vessel is 84 °, make the Surface Pressure Vessel temperature increase rapidly, use pyrostat, the Real-Time Monitoring surface temperature, with its surface temperature control below fusing point, more than austenitizing temperature, when superlaser from Surface Pressure Vessel through after, surface is cooling rapidly, make the pressurized vessel wall of the outer-rotor form the bar that hardens together, when laser line is gone to another edge of pressurized vessel wall of the outer-rotor, laser is got back to starting point one side, be offset 3mm to the right, move to the opposite side edge again, repeat above-mentioned motion, form approximately 100mm of one width in Surface Pressure Vessel finally, thickness is the hardenability band (Fig. 2) of 0.5mm, the overlapping rate of laser is 50%.Laser is around the pressurized vessel wall of the outer-rotor translational motion of spinning, and the laser walking manner adopts the single track travelling.The spiral translational motion refers to laser apparatus around the motion (as Fig. 1) of spinning of pressurized vessel wall of the outer-rotor, and when pressurized vessel was launched, its laser trend was straight line.
Pressurized vessel after sclerosis is carried out metallographic and mechanical test analysis, and result is as shown in the table:
| Classification | Dense internal organization | Anti-pressure ability |
| The usual pressure container | Generally | Generally |
| Pressurized vessel after laser hardening | Better | Very strong |
| Pressurized vessel after the use stiffening web | Generally | Stronger |
[0029] Embodiment 2
Surface Pressure Vessel is carried out pre-treatment, remove surperficial impurity and rusty stain etc.Removing the method for iron rust can use rust remover and rubber paper to carry out wiping to Surface Pressure Vessel.Adopt the processing trend of industrial PC laser beam, drive simultaneously servomotor and realize location.use the carbon dioxide laser of 4000W to carry out laser hardening on pressurized vessel wall of the outer-rotor surface, optical maser wavelength is 10.6 μ m, the laser travelling speed is 12mm/s, the laser scanning width is 5mm, the laser lap rate is 50%, superlaser shines Surface Pressure Vessel, the angle of cut of laser and Surface Pressure Vessel is 87 °, make the Surface Pressure Vessel temperature increase rapidly, use pyrostat, the Real-Time Monitoring surface temperature, with its surface temperature control below fusing point, more than austenitizing temperature, when superlaser from Surface Pressure Vessel through after, surface is cooling rapidly, make the pressurized vessel wall of the outer-rotor form the bar that hardens together, when laser line is gone to another edge of pressurized vessel wall of the outer-rotor, laser is got back to starting point one side, be offset 5mm to the right, move to the opposite side edge again, repeat above-mentioned motion, form approximately 100mm of one width in Surface Pressure Vessel finally, thickness is the hardenability band (Fig. 2) of 1mm, the overlapping rate of laser is 30%.Laser is around the pressurized vessel wall of the outer-rotor translational motion of spinning, and the laser walking manner adopts the single track travelling.
Pressurized vessel after sclerosis is carried out metallographic and mechanical test analysis, and result is as shown in the table:
| Classification | Dense internal organization | Anti-pressure ability |
| The usual pressure container | Generally | Generally |
| Pressurized vessel after laser hardening | Better | Very strong |
| Pressurized vessel after the use stiffening web | Generally | Stronger |
Any technician within the technical scope that the present invention discloses, is equal within the technical scheme of replacing or changing all should fall into protection scope of the present invention according to technical scheme of the present invention and inventive concept.
Claims (8)
1. method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser comprises:
A. Surface Pressure Vessel is carried out pre-treatment
B. use superlaser to carry out laser hardening on pressurized vessel wall of the outer-rotor surface, make the pressurized vessel wall of the outer-rotor form a small-scale hardenability band, superlaser is around the pressurized vessel wall of the outer-rotor translational motion of spinning, and the laser walking manner adopts the single track travelling.
2. a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser according to claim 1, it is characterized in that: in described step b method according to the analysis of pressurized vessel wall of the outer-rotor shape, adopt the processing trend of industrial PC laser beam, drive simultaneously servomotor and realize location.
3. a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser according to claim 1, it is characterized in that: in described b method, the laser apparatus walking manner is to get a starting point at pressurized vessel wall of the outer-rotor edge, along the wall of the outer-rotor translational motion of spinning, when laser apparatus is walked another edge of pressurized vessel wall of the outer-rotor, laser is got back to starting point one side, be offset 2-5mm to the right, then to the opposite side edge, move, repeat above-mentioned motion.
4. a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser according to claim 1, it is characterized in that: small-scale hardenability band in described b method, its width is about 100mm.
5. a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser according to claim 1, it is characterized in that: described laser apparatus is optical fiber laser, laser output power 3000W, optical maser wavelength is 1.06 μ m, travelling speed is 5-12mm/s, sweep length is 3-5mm, and the overlapping rate of laser is 30-50%, and the angle of cut of laser and Surface Pressure Vessel is 84 °-87 °.
6. a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser according to claim 1, it is characterized in that: described laser apparatus is carbon dioxide laser, laser output power 4000W, optical maser wavelength is 10.6 μ m, travelling speed is 5-12mm/s, sweep length is 3-5mm, and the angle of cut of laser and Surface Pressure Vessel is 84 °-87 °.
7. a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser according to claim 1, it is characterized in that: described thin hardened layer is 0.5-1mm.
8. a kind of method that improves cylindrical pressure vessel wall of the outer-rotor performance by superlaser according to claim 1 is characterized in that: the pre-treatment in described step a comprises removes pressurized vessel wall of the outer-rotor surface rusty stain and impurity etc.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4093842A (en) * | 1976-01-19 | 1978-06-06 | General Motors Corporation | Ported engine cylinder with selectively hardened bore |
| CN86100097A (en) * | 1986-01-04 | 1987-07-15 | 山东省交通厅青岛发动机厂 | Laser heat treatment process for high-speed diesel engine cylinder hole |
| CN86104349A (en) * | 1986-07-15 | 1988-02-03 | 中国科学院金属研究所 | A kind of technology of surface hardening treatment by laser and device |
| CN2395820Y (en) * | 1999-07-16 | 2000-09-13 | 马振强 | Plasma beam scanning hardened metal roller |
| WO2006110754A2 (en) * | 2005-04-11 | 2006-10-19 | Bekaert Progressive Composites Corporation | Side-ported filament wound pressure vessels |
| CN101189468A (en) * | 2005-06-06 | 2008-05-28 | 丰田自动车株式会社 | Pressure container and method of producing the same |
| CN201162496Y (en) * | 2007-09-26 | 2008-12-10 | 陈伟琛 | Surface vulcanized petroleum drilling tool |
| CN101381799A (en) * | 2008-09-25 | 2009-03-11 | 浙江申达机器制造股份有限公司 | Pin surface-hardening treatment method of plastics forming machine |
| CN101591724A (en) * | 2008-05-29 | 2009-12-02 | 韦星野 | Laser heat treatment technology in the drum type compression cylinder is used |
-
2013
- 2013-07-18 CN CN201310302197XA patent/CN103388056A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4093842A (en) * | 1976-01-19 | 1978-06-06 | General Motors Corporation | Ported engine cylinder with selectively hardened bore |
| CN86100097A (en) * | 1986-01-04 | 1987-07-15 | 山东省交通厅青岛发动机厂 | Laser heat treatment process for high-speed diesel engine cylinder hole |
| CN86104349A (en) * | 1986-07-15 | 1988-02-03 | 中国科学院金属研究所 | A kind of technology of surface hardening treatment by laser and device |
| CN2395820Y (en) * | 1999-07-16 | 2000-09-13 | 马振强 | Plasma beam scanning hardened metal roller |
| WO2006110754A2 (en) * | 2005-04-11 | 2006-10-19 | Bekaert Progressive Composites Corporation | Side-ported filament wound pressure vessels |
| CN101189468A (en) * | 2005-06-06 | 2008-05-28 | 丰田自动车株式会社 | Pressure container and method of producing the same |
| CN201162496Y (en) * | 2007-09-26 | 2008-12-10 | 陈伟琛 | Surface vulcanized petroleum drilling tool |
| CN101591724A (en) * | 2008-05-29 | 2009-12-02 | 韦星野 | Laser heat treatment technology in the drum type compression cylinder is used |
| CN101381799A (en) * | 2008-09-25 | 2009-03-11 | 浙江申达机器制造股份有限公司 | Pin surface-hardening treatment method of plastics forming machine |
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Application publication date: 20131113 |