CN102877061A - Method and device for remanufacturing stainless steel pump parts through laser cladding - Google Patents
Method and device for remanufacturing stainless steel pump parts through laser cladding Download PDFInfo
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- CN102877061A CN102877061A CN2012103912838A CN201210391283A CN102877061A CN 102877061 A CN102877061 A CN 102877061A CN 2012103912838 A CN2012103912838 A CN 2012103912838A CN 201210391283 A CN201210391283 A CN 201210391283A CN 102877061 A CN102877061 A CN 102877061A
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Abstract
The invention relates to a method and a device for remanufacturing stainless steel pump parts through laser cladding, in particular to a method and a device in which the stainless steel pump parts are heated to the dynamic strain aging temperature of stain steel base materials first and then the laser cladding is performed at the temperature. The innovation of the principle is that: the stainless steel pump parts at the dynamic strain aging temperature are subjected to laser cladding, and the dislocation motion of base materials of the parts and the particle diffusion of metal elements of coatings are accelerated by utilizing the raised temperature, so that prepared cladding layers have relatively large depths and the particle distribution is uniform; the temperature gradient in the laser cladding process is reduced by utilizing the characteristic that the base materials are in a dynamic strain aging temperature state, so that the inhibition of cracks in the cladding layers in the laser cladding process is facilitated; and the base materials produce the dynamic strain aging strengthening by utilizing the dynamic strengthening effect of the base materials, and a brand-new method for remanufacturing pump parts through the laser cladding is provided.
Description
Technical field
The present invention relates to a kind of laser melting coating and make again the method and apparatus of stainless steel pumps component, refer in particular to then a kind of dynamic strain aging temperature that first the stainless steel pumps component is heated to stainless steel substrate carries out laser melting coating under this temperature method and apparatus, the present invention can effectively realize the again manufacturing of pumps component, significantly improve the anti-erosion performance of pumps component, have broad application prospects, the method can also promote the use of the fields such as the again manufacturing of stainless steel axial workpiece, stainless steel blade and the processing of lengthening the life.
Background technology
Pump has a very wide range of applications in economic all departments in the gateway of a country such as agricultural irrigation, oil, power plant, city water supply and sewage, exploration, chemical industry, owing to the reason such as working conditions is abominable, cavitation, wear-out failure usually occur in the flow passage of pump, such as the pump valve of employed polymer-injecting pump in the field produces, easily produce erosion pit hole at contact surface and make the sealing effectiveness variation and affect pump efficiency; Moreover as in the irrigation and drainage pumping station, owing to containing a large amount of silts in the river, the impeller of water pump and and the cavitation of the flow passage components such as spiral case, wear and tear quite serious, abrasion not only makes the Efficiency Decreasing of pump, produce noise and vibration, and flow passage components surface substrate big area is peeled off, cause the operation life of pump significantly to shorten, even cause major accident, therefore must adopt an effective measure to improve the abrasion resistance on pumps component surface, conventional process for treating surface such as various coating, coating etc., because its relatively poor interlayer bonding force and thinner processing engineering thickness, be difficult to the requirement of competent these harsh occasions, the cladding laser surfaces technology is that the powdered alloy with heterogeneity adds in the formed molten bath of laser beam heats, and by laser it is melted, be formed at a kind of working method of the top coat of body material metallurgical binding behind the rapid solidification, the thermal distortion of laser melting coating processing is little, coating composition and thinning ratio are controlled, has coating and substrate combinating strength is high, do not come off, process velocity is fast, light beam acquiring processing flexibly, the level of automation high, when reducing energy consumption, can improve significantly the anti-cavitation of pumps component, Abrasion properties, effectively prolong the work-ing life of pumps component, all be better than qualitatively traditional process for treating surface with coating economically, but still there are the following problems for laser melting and coating technique: (1) microstructure of surface cladding layer is inhomogeneous; (2) base material heated forms larger thermograde in the cladding process, and the thermal stresses that thermograde causes easily causes cladding layer inside to crack.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of laser melting coating to make again the method and apparatus pump of stainless steel pumps component, namely at first the stainless steel pumps component is heated to stainless dynamic strain aging temperature province, under this temperature, part is carried out laser melting coating, utilize the temperature rising to accelerate the particle diffusion of part base material dislocation motion and coat metallic element, so that the profile depth of preparation is darker, size distribution is more even; The method can reduce the thermograde in the laser cladding process, can suppress the generation of cladding layer internal fissure in the laser cladding process, can also make simultaneously part base material itself produce dynamic strain aging strengthens, can effectively realize the again manufacturing of pumps component, significantly improve their anti-cavitation, Abrasion properties, have broad application prospects.The method can also promote the use of the fields such as the again manufacturing of stainless steel axial workpiece, stainless steel blade and the processing of lengthening the life.
The invention provides laser melting coating and make again the device of stainless steel pumps component, comprise the computer-controlled apparatus, optical fiber laser, vacuum insulation vessel, mechanical manipulator, flexible light-conducting pipe, cladding monitoring device, laser head, temperature sensor, coat, stainless steel pumps component, five axle worktable, vacuum pumping valve, the hot-plate that link to each other successively.
The cladding monitoring device is by the incident angle between K9 glass port monitoring continuous laser and the coat, the surface cladding quality of distance and stainless steel pumps component between laser head and the coat, monitoring data is returned computer-controlled apparatus, computer-controlled apparatus control optical fiber laser is launched continuous laser and is stopped emission, the unlatching of the temperature information control hot-plate that feeds back according to temperature sensor and stopping, control simultaneously the movement of five axle worktable, the motion of the working parameter of laser head and state and control mechanical manipulator drives laser head and moves, thereby the relative position of control Stainless Steel Pump class piece surface cladding zone and continuous laser beam, distance between laser facula size and laser head and the coat realizes that the laser melting coating of stainless steel pumps component is made again.
Vacuum insulation vessel must seal, adiabatic, inside is in vacuum state, guarantee that internal tank is in vacuum state in laser cladding process, sample is not oxidized, keep simultaneously constant temperature, the removable cover of vacuum insulation vessel top is mainly used in parts fixation and fixes and take out, the clamping of laser head and taking-up are used, the flexible light-conducting pipe is mainly used in the conduction of continuous laser beam, flexible light-conducting pipe and laser head must be high temperature resistant, temperature sensor is mainly used to monitor the real time temperature in the vacuum insulation vessel, hot-plate is used for to the heating of Stainless Steel Pump class part base solid, and vacuum pumping valve is mainly used to the state that is evacuated in the vacuum insulation vessel.
The concrete steps of method that this laser melting coating is made the stainless steel pumps component again are as follows:
(1) cleaning Stainless Steel Pump class piece surface is removed all dirts;
(2) will be coated in Stainless Steel Pump class piece surface by the coat that powdered alloy and binding agent form and be dried;
(3) Stainless Steel Pump class parts fixation is fixed on the five axle worktable;
(4) first five axle worktable are placed in the vacuum insulation vessel, locate, then make laser head extend in the vacuum insulation vessel, locate, again the state that is evacuated in the vacuum insulation vessel by manipulator clamping and motion;
(5) heat first the stainless steel pumps component to stainless dynamic strain aging temperature, then use optical fiber laser output continuous laser that piece surface is carried out laser melting coating and make again.
The method that a kind of laser melting coating of the present invention is made the stainless steel pumps component at first is the innovation of processing method, namely first the stainless steel pumps component is heated to stainless dynamic strain aging temperature, adopt again optical-fiber laser that laser melting coating is carried out on the pumps component surface and make again, realize that the laser melting coating of stainless steel pumps component is made again.
The innovation of the principle of the invention is, the stainless steel pumps component that is in the dynamic strain aging temperature is carried out laser melting coating, utilize the temperature that raises to accelerate the particle diffusion of part base material dislocation motion and coat metallic element, so that the cladding layer degree of depth of preparation is darker, even particle distribution; Utilize base material to be in this characteristic of dynamic strain aging state of temperature and reduce thermograde in laser cladding process, be conducive to suppress the generation of cladding layer internal fissure in the laser cladding process; Utilizing the dynamic contract-enhanced effect of base material itself, make base material itself produce dynamic strain aging and strengthen, is a kind of brand-new method that the pumps component laser melting coating is made again.
The quality percentage composition that is used for laser melting coating coat powdered alloy of stainless steel pumps component of the present invention is: Cr:15.0-20.0%, B:3.0-4.5%, Si:3.0-4.5%, Fe≤5.0%, W:4.0-6.0%, Ni: surplus, wherein B is anti-cavitation effect powder, has good anti-cavitation effect; W is wear-resisting powder, has good wear-resisting effect; Used binding agent is novolac epoxy-polysiloxane blend tackiness agent, the mass ratio of binding agent and powdered alloy is 3:20, and novolac epoxy-polysiloxane blend tackiness agent is that novolac epoxy, polysiloxane, glue class solidifying agent mix according to mass ratio 2:3:2; Laser melting coating carries out in vacuum insulation vessel, because internal tank is vacuum state, do not prevent the cladding surface oxidation therefore do not need to pass into again rare gas element, and laser melting coating adopts laser single track cladding or multiple tracks cladding to prepare anti-cavitation, wear-resistant coating at Stainless Steel Pump class piece surface, its thickness is 0.5 ~ 1 mm, the processing parameter of the optical-fiber laser that adopts is: the hot spot bandwidth is 3 * 3 mm light beams, power 3000 ~ 6000 W, sweep velocity 6 ~ 8 mm/s, adjacent spots overlapping rate 15% ~ 40% during the multiple tracks cladding.
The present invention has following advantage:
(1) stainless steel pumps component base material heating is carried out laser melting coating to part again to the dynamic strain aging temperature, can accelerate the particle diffusion of matrix dislocation motion and coat metallic element, thereby so that the profile depth of preparation is darker, and size distribution is more even; Base material carries out laser melting coating and has reduced the thermograde in the cladding process under the condition of high temperature, be conducive to suppress the crackle generation of cladding layer inside in the cladding process.
(2) the present invention is based on metallic substance can produce dynamic strain aging strengthening effect and metal powder granulates and be evenly distributed on the metallic substance top layer and produce the dispersion-strengthened effect under the dynamic strain aging temperature, the stainless steel pumps component that is positioned under the dynamic strain aging temperature is carried out laser melting coating, make part itself produce dynamic strain aging reinforcement, parts list layer material generation dispersion-strengthened, have dynamic strain aging and strengthen and dispersed particle-strengthened double effects.
(3) the present invention can improve the wear and corrosion behavior of Stainless Steel Pump class material more significantly than surface treatment methods such as conventional laser cladding and conventional spray paint.
Description of drawings
Fig. 1 is that laser melting coating is made Stainless Steel Pump class component device again;
(1) computer-controlled apparatus, (2) optical fiber laser, (3) vacuum insulation vessel, (4) mechanical manipulator, (5) flexible light-conducting pipe, (6) cladding monitoring device, (7) K9 glass port, (8) laser head, (9) removable cover, (10) continuous laser, (11) temperature sensor, (12) coat, (13) stainless steel pumps component, (14) five axle worktable, (15) vacuum pumping valve, (16) hot-plate.
Embodiment
Describe details and the working condition of the device of the matrix that the present invention proposes in detail below in conjunction with accompanying drawing.
With stainless steel pumps component laser melting coating of the present invention again manufacturing installation comprise computer-controlled apparatus 1, optical fiber laser 2, vacuum insulation vessel 3, mechanical manipulator 4, flexible light-conducting pipe 5, cladding monitoring device 6, laser head 8, temperature sensor 11, coat 12, stainless steel pumps component 13, five axle worktable 14, vacuum pumping valve 15 and hot-plate 16; Cladding monitoring device 6 is by the incident angle between K9 glass port 7 monitoring continuous lasers 10 and the coat 12, distance and stainless steel pumps component 13 surface cladding quality between laser head 8 and the coat 12, monitoring data is returned computer-controlled apparatus 1, computer-controlled apparatus 1 control optical fiber laser 2 is launched continuous lasers 10 and is stopped emission, the unlatching of the temperature information control hot-plate 16 that feeds back according to temperature sensor 11 and stopping, control simultaneously the movement of five axle worktable 14, the working parameter of laser head 8 and state and 4 motions of control mechanical manipulator drive laser head 8 and move, thereby the relative position of control stainless steel pumps component 13 surface claddings zone and continuous laser 10, distance between continuous laser 10 facular models and laser head 8 and the coat 12 realizes that the laser melting coating of stainless steel pumps component 13 is made again; Vacuum insulation vessel 3 must seal, adiabatic, inside is in vacuum state, guarantee that internal tank does not have air in laser cladding process, the laser melting coating zone is not oxidized, keep simultaneously constant temperature, the clamping that the removable cover 9 of vacuum insulation vessel 3 tops is mainly used in stainless steel pumps component (13) is fixed and is taken out, the clamping of laser head 8 and taking-up are used, flexible light-conducting pipe 5 is mainly used in the conduction of continuous laser 10, flexible light-conducting pipe 5 and laser head 8 must be high temperature resistant, temperature sensor 11 is mainly used to monitor the real time temperature in the vacuum insulation vessel 3, hot-plate 16 is used for to the heating of stainless steel pumps component 13 matrixes, and vacuum pumping valve 15 is mainly used to the state that is evacuated in the vacuum insulation vessel 3.
All dirts are removed on cleaning stainless steel pumps component 13 surfaces, will be coated in by the coat 12 that powdered alloy and binding agent form stainless steel pumps component 13 surfaces, and treat its drying; Stainless steel pumps component 13 clampings are fixed on the five axle worktable 14, five axle worktable 14 are placed in the vacuum insulation vessel 3, locate, then make laser head 8 extend in the vacuum insulation vessel 3, locate by mechanical manipulator 4 clampings and motion, close the removable cover 9 of vacuum insulation vessel 3, then by vacuum pumping valve 15 the state that is evacuated in the vacuum insulation vessel 3.Preheating stainless steel pumps component 13 matrixes according to 11 temp. displaying functions of temperature sensor, utilize the hot-plate 16 that is positioned at vacuum insulation vessel 3 bottoms that stainless steel pumps component 13 matrixes are heated to stainless dynamic strain aging temperature.According to stainless steel pumps component 13 matrix claddings zone requirement, generate the cladding track while scan by computer-controlled apparatus 1 programming, determine the processing parameters such as continuous laser 10 hot spot bandwidth, power, sweep velocity, it is that 3 * 3 mm, power are the continuous laser 10 of 3000 ~ 6000 W that optical fiber laser 2 sends the hot spot bandwidth, and computer-controlled apparatus 1 is regulated the facular model of continuous laser 3 by control laser head 8; The continuous laser 10 that is produced by optical fiber laser 2 passes through laser head 8 by 5 conduction of flexible light-conducting pipe, then regulate the facular model of continuous laser 10 by laser head 8, continuous laser 3 continues irradiation on the coat 12 on stainless steel pumps component 13 surfaces, continuous laser 10 fusing coats 12 and stainless steel pumps component 13 matrix surfaces make its common molten bath that forms, make the coat 12 of fusing form cladding layer with stainless steel pumps component 13 surface bonding, computer-controlled apparatus 1 control optical fiber laser 2 is launched continuous lasers 10 and is stopped emission, while is according to the movement of the process parameter control five axle worktable 14 of laser melting coating, the relative position of control stainless steel pumps component 13 matrix surface processing stands and continuous laser beam 10, stainless steel pumps component 13 matrixes that adopt 2 pairs of optical fiber lasers to be coated with coat 12 carry out single track or multiple tracks cladding, realize the again manufacturing of stainless steel pumps component 13 matrixes, computer-controlled apparatus 1 also can be determined according to the signal of cladding monitoring device 6 next step cladding process.
Claims (4)
1. a laser melting coating is made the method for stainless steel pumps component again, it is characterized in that comprising the steps:
(1) cleaning Stainless Steel Pump class piece surface is except crude removal;
(2) will be coated in Stainless Steel Pump class piece surface by the coat that powdered alloy and binding agent form and be dried;
(3) Stainless Steel Pump class parts fixation is fixed on the five axle worktable;
(4) first five axle worktable are placed in the vacuum insulation vessel, locate, then make laser head extend in the vacuum insulation vessel, locate, again the state that is evacuated in the vacuum insulation vessel by manipulator clamping and motion;
(5) heat first the stainless steel pumps component to stainless dynamic strain aging temperature, then use optical fiber laser output continuous laser that piece surface is carried out laser melting coating and make again formation anti-cavitation, wear-resistant coating.
2. a kind of laser melting coating as claimed in claim 1 is made the method for stainless steel pumps component again, it is characterized in that: the quality percentage composition of described powdered alloy is: Cr:15.0-20.0%, B:3.0-4.5%, Si:3.0-4.5%, Fe≤5.0%, W:4.0-6.0%, Ni: surplus; Used binding agent is novolac epoxy-polysiloxane blend tackiness agent, the mass ratio of binding agent and powdered alloy is 3:20, and novolac epoxy-polysiloxane blend tackiness agent is that novolac epoxy, polysiloxane, glue class solidifying agent mix according to mass ratio 2:3:2.
3. a kind of laser melting coating as claimed in claim 1 is made the method for stainless steel pumps component again, it is characterized in that: described anti-cavitation, wear-resistant coating thickness are 0.5 ~ 1 mm.
4. a kind of laser melting coating as claimed in claim 1 is made the method for stainless steel pumps component again, it is characterized in that: the processing parameter of described laser is: the hot spot bandwidth is 3 * 3 mm light beams, power 3000 ~ 6000 W, sweep velocity 6 ~ 8 mm/s, adjacent spots overlapping rate 15% ~ 40% during the multiple tracks cladding.
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| CN2012103912838A CN102877061A (en) | 2012-10-16 | 2012-10-16 | Method and device for remanufacturing stainless steel pump parts through laser cladding |
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| CN2012103912838A CN102877061A (en) | 2012-10-16 | 2012-10-16 | Method and device for remanufacturing stainless steel pump parts through laser cladding |
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Cited By (9)
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| CN103264267A (en) * | 2013-06-07 | 2013-08-28 | 山东塔高矿业机械装备制造有限公司 | Remanufacturing process of fully-mechanized coal mining hydraulic bracket |
| CN103600214A (en) * | 2013-12-06 | 2014-02-26 | 山东塔高矿业机械装备制造有限公司 | Processing technology for reproducing column head threaded holes of hydraulic support upright column |
| CN104250804A (en) * | 2013-06-28 | 2014-12-31 | 丹阳宏图激光科技有限公司 | Laser restoration method for blade cracks |
| CN105088224A (en) * | 2015-08-25 | 2015-11-25 | 江苏大学 | Device and method for strengthening water pump impeller and prolonging service life of water pump impeller |
| CN106591831A (en) * | 2016-12-29 | 2017-04-26 | 沈阳大陆激光工程技术有限公司 | Self-lubricating wear-resisting coating for laser manufacturing hot rolled strip curling front guide ruler liner plate |
| CN107119272A (en) * | 2017-07-05 | 2017-09-01 | 上海临仕激光科技有限公司 | A kind of method that port machine walks to take turns laser melting coating stainless steel coating |
| CN107354454A (en) * | 2017-07-12 | 2017-11-17 | 山东宇明月石油工程有限公司 | A kind of petroleum pipeline surface laser alloyage process |
| CN112760641A (en) * | 2020-12-26 | 2021-05-07 | 南京中科煜宸激光技术有限公司 | Laser cladding process and laser cladding repairing and processing system based on thermal aging treatment |
| CN113547117A (en) * | 2021-07-09 | 2021-10-26 | 华中科技大学 | Laser cladding alloy powder, steel rail and preparation method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264267A (en) * | 2013-06-07 | 2013-08-28 | 山东塔高矿业机械装备制造有限公司 | Remanufacturing process of fully-mechanized coal mining hydraulic bracket |
| CN104250804A (en) * | 2013-06-28 | 2014-12-31 | 丹阳宏图激光科技有限公司 | Laser restoration method for blade cracks |
| CN103600214A (en) * | 2013-12-06 | 2014-02-26 | 山东塔高矿业机械装备制造有限公司 | Processing technology for reproducing column head threaded holes of hydraulic support upright column |
| CN105088224A (en) * | 2015-08-25 | 2015-11-25 | 江苏大学 | Device and method for strengthening water pump impeller and prolonging service life of water pump impeller |
| CN106591831A (en) * | 2016-12-29 | 2017-04-26 | 沈阳大陆激光工程技术有限公司 | Self-lubricating wear-resisting coating for laser manufacturing hot rolled strip curling front guide ruler liner plate |
| CN107119272A (en) * | 2017-07-05 | 2017-09-01 | 上海临仕激光科技有限公司 | A kind of method that port machine walks to take turns laser melting coating stainless steel coating |
| CN107119272B (en) * | 2017-07-05 | 2019-11-19 | 上海临仕激光科技有限公司 | A kind of method that port machine walks to take turns laser melting coating stainless steel coating |
| CN107354454A (en) * | 2017-07-12 | 2017-11-17 | 山东宇明月石油工程有限公司 | A kind of petroleum pipeline surface laser alloyage process |
| CN107354454B (en) * | 2017-07-12 | 2018-05-15 | 山东宇明月石油工程有限公司 | A kind of petroleum pipeline surface laser alloyage process |
| CN112760641A (en) * | 2020-12-26 | 2021-05-07 | 南京中科煜宸激光技术有限公司 | Laser cladding process and laser cladding repairing and processing system based on thermal aging treatment |
| CN113547117A (en) * | 2021-07-09 | 2021-10-26 | 华中科技大学 | Laser cladding alloy powder, steel rail and preparation method |
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Application publication date: 20130116 |