CN110527998A - A kind of class seam weld-travelling-magnetic-field complex method improving defects in cladding layer - Google Patents
A kind of class seam weld-travelling-magnetic-field complex method improving defects in cladding layer Download PDFInfo
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- CN110527998A CN110527998A CN201810510894.7A CN201810510894A CN110527998A CN 110527998 A CN110527998 A CN 110527998A CN 201810510894 A CN201810510894 A CN 201810510894A CN 110527998 A CN110527998 A CN 110527998A
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- 238000000034 method Methods 0.000 title claims abstract description 28
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- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 7
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 6
- 238000000137 annealing Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 20
- 238000010583 slow cooling Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 6
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
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- 238000005728 strengthening Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 10
- 238000003466 welding Methods 0.000 description 9
- 238000004372 laser cladding Methods 0.000 description 7
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- 210000001787 dendrite Anatomy 0.000 description 5
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Abstract
A kind of class seam weld-travelling-magnetic-field complex method improving defects in cladding layer, the device of use specifically include that laser melting coating numerical control device, travelling-magnetic-field device and class seam weld device.Class seam weld device is opened first before cladding, until continued power for a period of time, secondly applies travelling-magnetic-field to molten bath in cladding process after the completion of cladding, makes the particle that non-magnetic particle and electrically charged amount are few in molten bath under impressed current effect, electrically charged amount increases.These liquid metal particles are significantly increased in outer plus servo-actuated travelling-magnetic-field by Lorentz force, and then melting bath stirring effect enhancing, number of dies increase, and refined crystalline strengthening is significant, and microstructure of surface cladding layer defect is reduced, Quality advance.This method efficiently solves non magnetic and electrically charged amount, and to lack particle small by Lorentz force in electromagnetic field, the magnetic field problem small to molten bath function composite by electromagnetic stirring, at the same overcome tradition is not only significant by enhancing magnetic field magnetic induction intensity thinning effect, need increase it is molten before heat in advance after annealing device the shortcomings that.
Description
Technical field
The present invention, which is with the method for class seam weld, to be the workpiece application AC field to cladding and then enhances travelling-magnetic-field to molten
The set composite of the strong mixing effect in pond can significantly improve cladding quality, and reducing defects in cladding layer, (such as stomata is mingled with, crackle
Deng) generation, belong to field of material surface modification.
Background technique
Laser melting and coating technique and 3D printing technique are industrially fast-developing new technologies in recent years.The common ground of the two
It is all to irradiate the powder near laser beam foucing by the short time, by itself and substrate upper surface portion using high-density laser beam
Divide and melt and be quickly cooled down, the alloy cladding that intensity hardness is higher, wearability is fabulous can be obtained on the preferable substrate of plasticity and toughness
Layer.Since the physical and chemical parameters difference such as substrate and linear expansion coefficient, the elasticity modulus at whiting end fusion is very big, it is quickly cooled down in molten bath
When, the thermal stress generated therebetween is very big, easily crack, cavity, stomata the defects of, these defects have seriously affected
Cladding quality, and then hinder the development of laser melting coating and 3D printing technique.
Aiming at the problem that the especially high hard cladding layer of cladding layer is also easy to produce crackle, various countries researcher largely grind
Study carefully, due to the feature that laser melting coating is quickly heated and cooled down, the electromagnetic agitation contactless to molten bath becomes improves cladding in recent years
The effective means of layer quality.In the electromagnetic field added outside, the Lorentz force generated by liquid metal particle flowing is by molten bath liquid
Electromagnetic field magnetic induction is depended merely on there are the influence for the factors such as the time is shorter in flowing velocity, the state-of-charge of liquid metal particle, molten bath
The raising of intensity, it is more difficult to realize to the sufficient electromagnetic agitation in molten bath.
It is not high for above-mentioned electromagnetic agitation intensity, the limited problem of the raising to quality of cladding layer.Recent domestic pair
Each householder method of cladding Quality advance has carried out compound research, achieves many achievements.Li Yongqiang is (referring to Li Yongqiang's " laser
The Changchun beam-electric-resistance seam-welding " complex welding method basic research [D]: Jilin University's college of materials science and engineering, 2009) it is logical
It crosses and develops a set of " electric resistance welding-Laser Welding " Combined Welding system, crossing current is carried out on 5052-H32 aluminium alloy base material and vertical fluid welding connects
Test finds the Ampere force effect that liquid metal is downward by direction in molten bath, and then changes its stress, can be obtained respectively
The different welding tissue of breadth depth ratio, but only by changing size of current, speed of welding and interelectrode distance, it is difficult to flexibly for more
Kind cladding material, the fireballing laser cladding process of cladding；On the other hand, (referring to Wang Liang, model Yi, the such as Luo Liangshun are dilute by Wang Liang
There are a metal material and engineering, 2016,45(12): travelling-magnetic-field 3177-3180) is applied by the molten metal to ZL205A alloy,
After cooled and solidified, by manufactured test specimen with not plus compared with the test specimen in magnetic field, microstructure and mechanical property have largely
Improvement, but this method for travelling-magnetic-field device form and specifically the magnetic field technological parameter that considers is not directed to excessively.
Compared with alternating magnetic field, rotating excitation field, travelling-magnetic-field is not required to circularize electromagnet or permanent magnet relative to molten bath
It arranges or is arranged symmetrically, simple for structure, the Lorentz force that liquid state molten pool particle is subject in externally-applied magnetic field can make particle strong
The effects of compeling flowing, agitation molten pool and then broken dendrite, can significantly improve laser cladding layer quality, but molten bath is in the liquid time
It is shorter, keep external magnetic field role limited.
Therefore, the present invention proposes a kind of method for combining class seam weld with travelling-magnetic-field, and the two is acted on simultaneously
Molten bath in laser cladding process enhances molten bath particle charging amount, and then causes the enhancing of molten bath Particles Moving, in electric field and magnetic
Under the collective effect of field, make that dendrite can be crushed by the forced convertion agitation effects that electromagnetism power drive metal bath generates in molten bath,
Increase the number of non-spontaneous forming core nucleus, extend bubble time of liberation etc., finally obtains few etc. excellent of structure refinement, crackle stomata
Good cladding layer.Compared with only loading travelling-magnetic-field, one side cladding substrate and powder can in advance by the resistance fuel factor of class seam weld,
Play pre- heat effect；On the other hand, the electric current of class seam weld can enhance the chargeability and fluid ability of the metallic of liquid state molten pool,
And then enhance the function and effect of electromagnetic force；Finally, using the resistance fuel factor of class seam weld, playing slow cooling in the cooling procedure of molten bath and making
With.
By being retrieved to domestic and foreign literature, current research person focus primarily upon to welding or laser melting coating add magnetic field or
Electric field, but in view of the distinctive cladding speed of laser melting coating is fast, molten bath there are the time it is short the features such as.It is molten in order to improve laser
The shortcomings that covering each householder method, spy propose both combination method, through retrieving, this method be present invention firstly provides.
Summary of the invention
The present invention disadvantage short to liquid state molten pool action time for travelling-magnetic-field, utilizes the spy of class seam weld in electric resistance welding
Point, the two is carried out compound, is caused molten bath big intensity modulation flowing, broken dendrite etc. by electromagnetic force, is reduced tissue defects, together
The resistance fuel factor of Shi Liyong class seam weld, has preheating and slow cooling effect to cladding layer and substrate, final to obtain the molten of good quality
Coating tissue.
The purpose of the present invention can be achieved through the following technical solutions:
1, class of the invention seam weld-travelling-magnetic-field set composite
The device of the invention mainly forms: laser melting coating numerical control device, travelling-magnetic-field device and class seam weld device.Wherein, laser
Cladding numerical control device is mainly made of a set of numerical control device and laser (5), powder feeder (2), argon bottle (1) etc..Travelling-magnetic-field
Device then mainly has travelling-magnetic-field power control (2), iron core fixing bolt (13), the coil windings iron core for being provided with T-slot
(15), three-phase windings (16) and fixed plate (7) composition, wherein travelling-magnetic-field generating device and laser (5) etc. are fixed together
Plate (7) is fixed on numerical control device, and travelling-magnetic-field is made to act on molten bath always, realizes the servo antrol of electromagnetic field.Such as Fig. 2 institute
Show, three-phase windings (16) use star connection, and are respectively disposed in corresponding core slots, A, B, C three-phase windings current electrifying phase
Position successively differs 60 degree, can produce travelling-magnetic-field magnetic flux density profile (17).By adjusting travelling-magnetic-field power control (9)
Electric current and the size of frequency control the distribution and pace of change of travelling-magnetic-field magnetic flux density profile (17), and then to realize pair
The electromagnetic field in different cladding material molten baths controls.Class seam weld device is then mainly by electrode base board (18), primary and secondary coil, spring branch
Support set cylinder (23), electrode column (24), spring cross compress pylon (27), connection lug (28), wheel electrode (33) and compress bullet
The composition such as spring.As shown in Figures 3 and 4, connection lug (28) bolt (13) is fixed to be fixed on electrode base board (18), due to
Groove is provided on electrode base board (18), the position of spring supporting sleeve (23) can be adjusted along cladding direction, and then adjustable
Distance d between two wheel electrodes1.Spring is pressed in the lower spring cup of stop sleeve (23) and spring cross compresses pylon (27)
Between, the adjusting of pressing force of the spring is realized by adjusting the screwing length of screw thread on fastening nut (26) and electrode column (24),
And then wheel electrode is adjusted to cladding layer pressing force.As shown in figure 5, main circuit uses 220V alternating current as power supply, in transformation
The primary side of device is adjusted by series determines that transformer transformation ratio passes through secondary cable to adjust the numerical value of secondary end voltage
(22) loads such as wheel electrode (33) are connected directly between transformer secondary output end.
2, class of the invention seam weld-travelling-magnetic-field set composite implementation method
1) it after by whiting end fusion and substrate workpiece by the processing of laser melting coating normal process, is respectively disposed in powder feeder and works
On platform；
2) pre-pressing force for adjusting spring spool position and spring presses wheel electrode on matrix, and makes between wheel electrode
Distance d1For 20~40mm, class seam weld main power switch is opened, primary side electric current and series is adjusted, secondary end is made to pass through workpiece
Electric current i1For 2~12kA；
3) workpiece temperature is measured with infrared radiation thermometer, rises to 200~800 DEG C to workpiece temperature, opens the control of travelling-magnetic-field power supply
Device processed, make travelling-magnetic-field respectively communicates 20~200Hz of electric frequency, each phase electrical current iA(or iB、iC) it is 2~10A.With
After start the cladding apparatus such as laser, powder feeder and numerical control device, using conventional laser cladding technological parameter, carry out cladding；
4) it is finished to cladding, closes the cladding apparatus such as laser, powder feeder and numerical control device, be then turned off travelling-magnetic-field device,
For slow cooling cladding tissue, class seam weld device is continued into 5~15min of energization, class seam weld device is then turned off, workpiece is completed into cladding
It is placed in air or annealing device and is cooled to room temperature.
Compared with the prior art, the present invention has the following advantages:
1, short there are the time due to liquid state molten pool, cooling time is fast, and cladding defect (such as crackle, stomata) overwhelming majority results from
The two stages.The present invention proposes for class seam weld device and electrode base board to be fixed on numerical control device, by spring by electrode
Idler wheel presses on matrix and cladding layer, which can be applied to molten bath, enhancing liquid gold by wheel electrode always
Belong to the chargeability of particle and reinforce molten bath solution flow strength, while also using the resistance fuel factor of electric resistance welding, to laser
The powder and matrix of predose are preheated, carry out slow cooling processing to the tissue after cladding.
2, the present invention proposes for travelling-magnetic-field generating device to connect by connecting plate with numerical control device, with alternating magnetic field, rotation
Turn magnetic field to compare, travelling-magnetic-field is not required to electromagnet or permanent magnet circularizing arrangement relative to molten bath or be arranged symmetrically, structure letter
It is single easy, it is servo-actuated with molten bath to solve the problems, such as that traditional alternating magnetic field and rotating excitation field are not easy, guarantees that travelling-magnetic-field can be made always
For liquid state molten pool.By adjusting each phase electrical current of travelling-magnetic-field generating device and frequency, the magnetic flux of travelling-magnetic-field can be changed
Density curve amplitude and frequency.After the electric current transmitted by circular electrode, the electrically charged amount of particle institute increases liquid metal particle
Lorentz force enhancings that are more, being subject in travelling-magnetic-field, molten bath convection intensity increase, and dendrite fragmentation increases, and stomata rises evolution
Time increases.
3, cladding powder is based on Self-fusing powder, ceramic powders and composite powder, though with magnetic powder in these types of powder
Based on end, but still have a large amount of nonmagnetic powder, the Lorentz force being subject in magnetic field less and liquid state molten pool there are the times
The factors such as short, magnetic field agitation effect are still limited.On the one hand class seam weld-travelling-magnetic-field device proposed by the present invention enhances magnetic
On the other hand the chargeability of metallic also will increase the non-magnetic particle quantity of electric charge, and then molten bath majority liquid particles charge
The increase of amount brings its suffered Lorentz force enhancing in travelling-magnetic-field, and molten bath strong flows make washing away and being crushed for dendrite
With reinforcement, reduce cladding tissue defects, Quality advance.
Detailed description of the invention
Fig. 1 is set composite general illustration of the present invention and travelling-magnetic-field device partial enlarged view；
Fig. 2 is travelling-magnetic-field device working principle diagram of the present invention；
Fig. 3 is class seam weld device connection figure of the present invention；
Fig. 4 is electrode column totality of the present invention and fixed figure；
Fig. 5 is class seam weld working principle diagram of the present invention.
Specific embodiment
In class seam weld device connection figure shown in Fig. 3, after substrate is fixed and is placed in workbench, fine tuning laser beam is swashing
Position in light beam through-hole (20) makes laser beam foucing be located at the center of rectangular through-hole.The position of adjustment connection lug (28)
It sets, roll wheel electrode (33) can along laser melting coating direction easily, and make the distance d between two wheel electrodes (33)1For 20~
40mm adjusts the position of fastening nut (26) on electrode column (24), and then adjusts wheel electrode (33) In by holddown spring
Compression degree on substrate.As shown in Figure 1, opening class seam weld power supply device, by adjusting primary side electric current and series, make to pass through
Workpiece electric current i1For 2~12kA.Workpiece temperature is measured with infrared radiation thermometer, after workpiece temperature rises to 200~800 DEG C, such as
Shown in Fig. 1, open travelling-magnetic-field power control (9), make travelling-magnetic-field respectively communicates 20~200Hz of electric frequency, each phase
Electrical current iA(or iB、iC) it is 2~10A.After the travelling-magnetic-field that travelling-magnetic-field device generates is stablized, laser, powder feeding are started
The cladding apparatus such as device and numerical control device carry out laser melting coating using conventional laser cladding technological parameter.It finishes, closes to cladding
The cladding apparatus such as laser, powder feeder and numerical control device are closed, travelling-magnetic-field device is then turned off, are slow cooling cladding tissue, by class
Seam weld device continues 5~15min of energization, closes class seam weld device, cladding completion workpiece is placed in cold in air or annealing device
But to room temperature.
Below with reference to embodiment, the present invention is further elaborated, but protection content of the invention is not limited to the range.
Embodiment 1
1, will be having a size of 100mm*20mm*20mm(long * wide * high) Q235(chemical component percentage Wt% are as follows: 0.5Mn,
0.3Si, 0.2C, 0.05S, 0.045P, Fe surplus) substrate plate is fixed and is placed on workbench, trimming electrode substrate and numerical control
The relative position of device makes laser beam foucing be located at the center of rectangular through-hole.The position of adjustment connection lug, makes two electrodes
Distance between idler wheel is d1For 25mm, the position of fastening nut over the electrode shaft is adjusted, wheel electrode is made to be pressed on table on substrate
Face；
2, class seam weld main power switch is opened, primary side electric current and series is adjusted, makes through workpiece electric current i1For 5kA, realization pair
The pre-heat treatment of substrate workpiece, measures base material temperature with infrared radiation thermometer, rises to 300 DEG C to temperature, opens travelling-magnetic-field electricity
Source control device, make travelling-magnetic-field respectively communicates electric frequency 50Hz, each phase electrical current iA(or iB、iC) it is 5A；Start laser
(wherein cladding powder uses Ni60+70%WC(Ni60 chemical component percentage to the cladding apparatus such as device, powder feeder and numerical control device
Wt% are as follows: 16Cr, 3.5B, 4.5Si, 0.8C, 0.045P, Fe≤15.0, Ni surplus)).Using laser cladding technological parameter are as follows: swash
Optical power 2.8kW, cladding speed: 300mm/min, spot diameter 5mm, lateral powder feed rate 80g/min, overlapping rate 40%；
3, make cladding direction along length substrate direction, and make a length of 30mm of cladding single track, using the cladding mode of " Long Huitou ", make
Cladding overlapping rate is 40%, after laser scanning 3, and cladding is completed.It is then turned off the claddings such as laser, powder feeder and numerical control device
Device closes traveling wave magnetic field device.For slow cooling cladding tissue, class seam weld device is continued into energization 8min, is then turned off class seam weld
Cladding completion workpiece is placed in air and is cooled to room temperature by device.
Embodiment 2
Method is same as Example 1, and only 1 step 2 travelling-magnetic-field power control of embodiment makes respectively to communicate electric frequency
80Hz, each phase electrical current iA(or iB、iC) it is 3A.
Embodiment 3
Method is same as Example 1, and only 1 step 2 of embodiment passes through workpiece electric current i1For 8kA, travelling-magnetic-field power supply control dress
Setting makes respectively to communicate electric frequency 80Hz, each phase electrical current iA(or iB、iC) it is 3A.
The above is only presently preferred embodiments of the present invention, are not intended to limit the present invention in any form, and are not departing from this
Made related improve also should be regarded as protection scope of the present invention under the premise of inventive principle.
Part that the present invention does not relate to is identical as existing technology or can be realized by using the prior art.
Claims (5)
1. a kind of class seam weld-travelling-magnetic-field complex method for improving defects in cladding layer, it is characterized in that it mainly includes laser melting coating
Numerical control device, travelling-magnetic-field device and class seam weld device, each device are specific as follows: argon bottle (1), powder feeder (2), powder-feeding nozzle
(3), laser beam (4), laser (5), laser connecting plate (6), fixed plate (7), numerical control device (8), travelling-magnetic-field power supply control
Device (9) processed, fixed platform (10), travelling-magnetic-field generating device (11), workbench (12), fixing bolt (13), washer (14),
It is provided with the coil windings iron core (15) of T-slot, three-phase windings (16), travelling-magnetic-field magnetic flux density profile (17), electrode base board
(18), hold-down bolt (19), laser beam through-hole (20), connection lug is mobile groove (21), class seam weld power supply device (22), spring
Stop sleeve (23), electrode column (24), spring cross compress pylon fastening screw (25), fastening nut (26), spring cross pressure
Tight pylon (27), connects lug (28), and cross compresses pylon shifting chute (29), bearing (ball) cover fixing screws (30), angular contact ball
Bearing (31), bearing (ball) cover (32), wheel electrode (33)；Wherein travelling-magnetic-field device characteristic is travelling-magnetic-field generating device and swashs
Light device (5) etc. is fixed plate (7) together and is fixed on numerical control device, and three-phase windings (16) use star connection, and are set to respectively
In corresponding core slots, A, B, C three-phase windings current electrifying phase successively differ 60 degree, and it is bent to can produce travelling-magnetic-field magnetic flux density
Line (17)；It is close to control travelling-magnetic-field magnetic flux by the electric current of adjusting travelling-magnetic-field power control (9) and the size of frequency
It writes music the distribution and pace of change of line (17), and then to realize the electromagnetic field control to different cladding material molten baths；Wherein class is stitched
Welder, which is characterized in that lug (28) will be connected, to be fixed bolt (13) and is fixed on electrode base board (18), due to electrode base board (18)
On be provided with groove, the position of spring supporting sleeve (23) can be adjusted along cladding direction, and then between adjustable two wheel electrodes
Distance d1；Spring is pressed in the lower spring cup of stop sleeve (23) and spring cross compresses between pylon (27), passes through tune
The screwing length of screw thread realizes the adjusting of pressing force of the spring on whole fastening nut and electrode column, and then adjusts wheel electrode to molten
Coating pressing force；Main circuit using 220V alternating current be used as power supply, transformer primary side by adjusting primary side electric current and
The loads such as circular electrode are connected directly between transformer by secondary cable to adjust the numerical value of secondary end voltage by series
Grade end.
2. set composite according to claim 1, class seam weld device fixed character is connecting plate, laser and numerical control
Device is bolted together, and can adjust the distance between two wheel electrodes d1And wheel electrode is to the pressure of cladding layer, it is real
Existing adjusting of the class seam weld device to the follow-up action and current strength, roller compression degree in molten bath.
3. class seam weld device according to claim 1, for specific fore-put powder cladding process it is characterized in that powder quilt
It is preset in the substrate surface of machined mistake, for the generation for reducing crackle, class seam weld device is opened, substrate and powder is preheated
Processing, after the completion of cladding, class seam weld device continues to keep it turning on a period of time, carries out slow cooling processing to cladding layer.
4. class seam weld device according to claim 1, for specific synchronous powder feeding system cladding process it is characterized in that for
Finished substrate surface opens class seam weld device for the generation for reducing crackle, carries out the pre-heat treatment to substrate and powder, melts
After the completion of covering, class seam weld device continues to keep it turning on a period of time, carries out slow cooling processing to cladding layer.
5. set composite according to claim 1, wherein the distance d between two wheel electrodes1For 20~40mm, two electrodes are crossed
The electric current i of substrate between idler wheel1The electric frequency that respectively communicates for 2~12kA, travelling-magnetic-field is 20~200Hz, and feature includes such as
Lower step:
(1) it after by whiting fusion end and substrate workpiece by the processing of laser melting coating normal process, is respectively disposed in powder feeder and work
Make on platform；
(2) pre-pressing force for adjusting spring spool position and spring presses idler wheel on matrix, and opening class seam weld main power source is opened
It closes, adjusts primary side electric current and series, electric current is made to pass through the substrate between two wheel electrodes；
(3) workpiece temperature is measured with infrared radiation thermometer, rises to 200~800 DEG C to workpiece temperature, opens the control of travelling-magnetic-field power supply
Device processed then starts the cladding apparatus such as laser, powder feeder and numerical control device, carries out cladding；
(4) it is finished to cladding, closes the cladding apparatus such as laser, powder feeder and numerical control device, be then turned off travelling-magnetic-field device,
For slow cooling cladding tissue, class seam weld device is continued into 5~15min of energization, class seam weld device is then closed, workpiece is completed into cladding
It is placed in air or annealing device and is cooled to room temperature.
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| CN201810510894.7A CN110527998A (en) | 2018-05-24 | 2018-05-24 | A kind of class seam weld-travelling-magnetic-field complex method improving defects in cladding layer |
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Cited By (1)
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| CN111058041A (en) * | 2020-02-28 | 2020-04-24 | 卢彦山 | Laser cladding is with base member border powder fender device of cutting |
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| WO2000063457A2 (en) * | 1999-04-16 | 2000-10-26 | Salzgitter Ag | Method and device for producing a metal strip |
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| WO2004090190A1 (en) * | 2003-04-09 | 2004-10-21 | Sms Demag Aktiengesellschaft | Method and device for hot dip coating a metal strand |
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| CN111058041A (en) * | 2020-02-28 | 2020-04-24 | 卢彦山 | Laser cladding is with base member border powder fender device of cutting |
| CN111058041B (en) * | 2020-02-28 | 2024-03-22 | 新密蓝火激光科技有限公司 | Matrix edge powder blocking device for laser cladding |
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