CN110527999A - A kind of impulse electric field-travelling-magnetic-field complex method reducing re-melt deposit welding - Google Patents
A kind of impulse electric field-travelling-magnetic-field complex method reducing re-melt deposit welding Download PDFInfo
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- CN110527999A CN110527999A CN201810510930.XA CN201810510930A CN110527999A CN 110527999 A CN110527999 A CN 110527999A CN 201810510930 A CN201810510930 A CN 201810510930A CN 110527999 A CN110527999 A CN 110527999A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003466 welding Methods 0.000 title claims abstract description 7
- 238000005253 cladding Methods 0.000 claims abstract description 45
- 230000005684 electric field Effects 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 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 9
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 8
- 230000004907 flux Effects 0.000 claims description 6
- 238000004372 laser cladding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 4
- 241000276489 Merlangius merlangus Species 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
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- 239000011159 matrix material Substances 0.000 claims description 3
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- 229910052786 argon Inorganic materials 0.000 claims description 2
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- 230000007547 defect Effects 0.000 abstract description 7
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- 238000003756 stirring Methods 0.000 abstract description 3
- 239000006249 magnetic particle Substances 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 1
- 238000009991 scouring Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 10
- 208000037656 Respiratory Sounds Diseases 0.000 description 8
- 238000013019 agitation Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 4
- 238000010146 3D printing Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
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- 238000006062 fragmentation reaction Methods 0.000 description 2
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- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
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- 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
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Abstract
A kind of impulse electric field-travelling-magnetic-field complex method reducing re-melt deposit welding, this method equipment therefor includes: laser melting coating numerical control device, travelling-magnetic-field device and positive negative pulse stuffing electric field arrangement.Travelling-magnetic-field is applied to molten bath in cladding process, makes in molten bath that under impressed current effect, electrically charged amount increases for non-magnetic particle and electrically charged few particle.These liquid metal particles are in outer plus servo-actuated travelling-magnetic-field, it is significantly increased by Lorentz force, acting on melting bath stirring enhances, make dendrite by fluid scouring, it is broken the effects of increase, crystallite dimension is reduced, refined crystalline strengthening effect is obvious, stomata, be mingled with, component segregation the defects of reduction, re-melt deposit welding generate probability become smaller.It is small by Lorentz force in electromagnetic field that the set composite efficiently solves non magnetic and electrically charged few particle, the magnetic field problem small to molten bath function composite by electromagnetic stirring.
Description
Technical field
The present invention is to enhance travelling-magnetic-field and applying positive negative impulse current to liquid state molten pool to stir molten bath strongly effect
The set composite of fruit can significantly improve cladding quality, reduce the generation of defects in cladding layer (such as stomata is mingled with, crackle), belong to
In 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 the powder near laser beam foucing to be irradiated 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.
For the research of conventional metal member crackle crack arrest, Fu Yuming team, University On The Mountain Of Swallows is to the metal component containing crackle
Crack arresting through pulse current discharge is carried out, crack tip streams hot concentration effect due to electric current, makes to split point fusing in moment and forms weld bond, makes
Crack tip passivation, no longer extends, plays the role of crackle crack arrest；Wang Liang is (referring to Wang Liang, model Yi, the rare metal such as Luo Liangshun
Material and engineering, 2016,45(12): travelling-magnetic-field 3177-3180) is applied by the molten metal to ZL205A alloy, in cooling
After solidification, by manufactured test specimen with not plus compared with the test specimen in magnetic field, microstructure and mechanical property have a greater degree of 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 that positive negative pulse stuffing electric field combines with travelling-magnetic-field, and the two is made simultaneously
For the molten bath in laser cladding process, increase molten bath particle charging amount, and then cause the enhancing of molten bath Particles Moving, in electric field
Under the collective effect in magnetic field, make that branch can be crushed by the forced convertion agitation effects that electromagnetism power drive metal bath generates in molten bath
Crystalline substance increases the number of non-spontaneous forming core nucleus, extends bubble time of liberation etc., and it is few etc. finally to obtain structure refinement, crackle stomata
Excellent cladding layer.Compared with only loading travelling-magnetic-field, positive negative pulse stuffing can enhance the chargeability of the metallic of liquid state molten pool
And two-way flow ability, and then enhance the function and effect of electromagnetic force.
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, using positive negative pulse stuffing power supply device to molten
Pond applies positive negative impulse current, the two is carried out compound, causes the big intensity modulation two-way flow in molten bath, broken branch by electromagnetic force
Crystalline substance etc., reduce stomata, be mingled with, component segregation, large dendritic crystal the defects of generation, significantly alleviation stress collection it is medium, and then reduce
The probability that crackle generates.
The purpose of the present invention can be achieved through the following technical solutions:
1, positive negative pulse stuffing of the invention electric field-travelling-magnetic-field set composite
The device of the invention mainly forms: laser melting coating numerical control device, travelling-magnetic-field device and positive negative pulse stuffing electric field arrangement.Its
In, laser melting coating numerical control device is mainly by a set of numerical control device and laser (5), powder feeder 2(2), argon bottle (1) etc. forms.
Travelling-magnetic-field device then mainly has travelling-magnetic-field power control (9), iron core fixing bolt (13), the coil for being provided with T-slot
Winding iron core (15), three-phase windings (16) and fixed plate (7) form, wherein the quilts such as travelling-magnetic-field generating device and laser (5)
Fixed 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
Shown, three-phase windings (16) use star connection, and are respectively disposed in corresponding core slots, A, B, C three-phase windings current electrifying
Phase successively differs 60 degree, can produce travelling-magnetic-field magnetic flux density profile (17).By adjusting travelling-magnetic-field power control
(9) size of electric current and frequency controls the distribution and pace of change of travelling-magnetic-field magnetic flux density profile (17), and then comes real
Now the electromagnetic field in different cladding material molten baths is controlled.Positive negative pulse stuffing electric field arrangement is then mainly by electrode base board (18), direct current
Source device (22), spring supporting sleeve (23), electrode column (24), spring cross compress pylon (27), connection lug (28), electrode
The composition such as idler wheel (33) and holddown spring.As shown in Figures 3 and 4, connection lug (28) is fixed bolt (13) and is fixed on electrode
On substrate (18), due to being provided with groove on electrode base board (18), the position of spring supporting sleeve (23) can be carried out along cladding direction
Adjustment, and then the distance d between adjustable two wheel electrodes1.Spring is pressed in the lower spring cup and spring of stop sleeve (23)
Cross compresses between pylon (27), realizes bullet by adjusting the screwing length of screw thread on fastening nut (26) and electrode column (24)
The adjusting of spring pressing power, and then wheel electrode is adjusted to cladding layer pressing force.Circuit uses positive negative pulse stuffing power supply (22), passes through line
Wheel electrode (27), substrate workpiece, positive negative pulse stuffing power supply (22) are constituted a circuit by cable, by adjusting positive negative pulse stuffing power supply electricity
The size of pressure and frequency, it is changeable to act on the size of the electric current in molten bath and frequency in cladding process.
2, positive negative pulse stuffing of the invention electric field-travelling-magnetic-field set composite implementation method
1) it after by whiting fusion end and substrate workpiece by the processing of laser melting coating normal process, is put in powder feeder respectively and workbench
On；
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, positive negative pulse stuffing power switch is opened, adjusts the size of pulse power voltage and frequency, made two electricity
The positive pulse current amplitude i of substrate between the idler wheel of pole1For 2~12kA, because positive negative pulse stuffing is symmetrical, negative pulse amplitude is -12~-
2kA, cycle T are 0.02~0.005s；
3) after stablizing by the electric current of substrate, travelling-magnetic-field power control is opened, makes each frequency that is mutually powered of travelling-magnetic-field
Rate is 20~200Hz, each phase electrical current iA(or iB、iC) it is 2~10A, then start laser, powder feeder and numerical control device
Equal cladding apparatus carry out cladding using conventional laser cladding technological parameter；
4) finished to cladding, close the cladding apparatus such as laser, powder feeder and numerical control device, be then turned off travelling-magnetic-field device and
Cladding completion workpiece is placed in air or annealing device and is cooled to room temperature by positive negative pulse stuffing power supply device.
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, generates if cladding defect (such as the crackle, stomata etc.) overwhelming majority
In the two stages.Positive negative pulse stuffing electric field arrangement is fixed on numerical control device by present invention proposition by electrode base board, passes through bullet
Spring presses wheel electrode molten on matrix and microstructure of surface cladding layer, making the device electric current always and can be acted on by wheel electrode
Pond enhances the chargeability of liquid metal particle and reinforces molten bath solution two-way flow intensity, enhances dendrite souring, makes
Non- forming core nucleus number increases, and electromagnetic field refining effect increases.
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.Liquid metal particle is after the electric current transmitted by circular electrode, the enhancing of particle chargeability,
And then the Lorentz force enhancing that can be subject in travelling-magnetic-field, molten bath flow strength increase, dendrite fragmentation increases, and stomata rises ease
The time increases out.
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 positive negative pulse stuffing electric field-travelling-magnetic-field device proposed by the present invention increases
Add the chargeability of magnetic metal particle, on the other hand can also enhance the non-magnetic particle quantity of electric charge, and then molten bath majority liquid grain
The increase of charge of the electron amount brings its suffered Lorentz force enhancing in travelling-magnetic-field, molten bath strong flows to dendrite wash away and
Fragmentation reinforce, refined crystalline strengthening effect is obvious, stomata, be mingled with, component segregation the defects of reduction, re-melt deposit welding generate probability
Become smaller.
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 positive negative pulse stuffing electric field arrangement connection figure of the present invention；
Fig. 4 is electrode column totality of the present invention and fixed figure；
Fig. 5 is the positive negative pulse stuffing schematic diagram that the present invention acts on molten bath.
Specific embodiment
In positive negative pulse stuffing electric field arrangement connection figure shown in Fig. 3, after substrate is placed in workbench, fine tuning laser beam exists
Position in laser beam through-hole (20) makes laser beam foucing be located at the center of rectangular through-hole.Adjustment connection lug (28)
Position roll wheel electrode (33) can along laser melting coating direction easily, and make the distance d between two wheel electrodes (33)1It is 20
~40mm adjusts the position of fastening nut (26) on electrode column (24), and then can adjust wheel electrode by holddown spring
(33) compression degree on base material.As shown in Figures 1 and 5, positive negative pulse stuffing electric field power supply device is opened, by adjusting positive and negative arteries and veins
Electric field supply voltage and frequency values are rushed, the positive pulse current amplitude i of substrate between two wheel electrodes was made1For 2~12kA, because
Positive negative pulse stuffing is symmetrical, and negative pulse amplitude is -12~-2kA, and cycle T is 0.02~0.005s.It is exported to positive negative pulse stuffing electric field arrangement
After electric current is stablized, as shown in Figure 1, opening travelling-magnetic-field power control (9), make travelling-magnetic-field respectively communicates electric frequency 20
~200Hz, 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, open
The cladding apparatus such as dynamic laser, powder feeder and numerical control device carry out laser melting coating using conventional laser cladding technological parameter.
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 and positive and negative arteries and veins
Electric field arrangement is rushed, cladding completion workpiece is placed in air or annealing device and is cooled 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 fixedly 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, positive negative pulse stuffing electric field power switch is opened, is made through workpiece positive negative impulse current amplitude ± 5kA, cycle T is
0.008s opens travelling-magnetic-field power control, makes travelling-magnetic-field after electric field arrangement output positive negative impulse current is stablized
Respectively communicating electric frequency is 50Hz, each phase electrical current iA(or iB、iC) it is 5A.It is molten to start laser, powder feeder and numerical control device etc.
Coating device (wherein cladding powder uses Ni60+70%WC(Ni60 chemical component percentage 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: laser 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.The cladding apparatus such as laser, powder feeder and numerical control device are closed,
It is then turned off travelling-magnetic-field device and positive negative pulse stuffing electric field power supply device, cladding completion workpiece is placed in air or annealing device
It is cooled to room temperature.
Embodiment 2
Method is same as Example 1, and only 1 step 1 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 makes through workpiece positive negative impulse current amplitude ± 8kA, cycle T
For 0.008s, travelling-magnetic-field power control 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 (3)
1. a kind of impulse electric field-travelling-magnetic-field complex method for reducing re-melt deposit welding, it is characterized in that it is mainly molten including laser
Numerical control device, travelling-magnetic-field device and positive negative pulse stuffing electric field arrangement are covered, each device is 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), traveling wave magnetic
Field ionization source control device (9), fixed platform (10), travelling-magnetic-field generating device (11), workbench (12), fixing bolt (13),
Washer (14) is provided with the coil windings iron core (15) of T-slot, three-phase windings (16), travelling-magnetic-field magnetic flux density profile (17), electricity
Electrode substrate (18), hold-down bolt (19), laser beam through-hole (20), connection lug is mobile groove (21), positive negative pulse stuffing power supply device
(22), spring supporting sleeve (23), electrode column (24), spring cross compress pylon fastening screw (25), fastening nut (26), bullet
Spring cross compresses 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
Device and laser (5) etc. are fixed plate (7) together and are fixed on numerical control device, and three-phase windings (16) use star connection, and
It is respectively disposed in corresponding core slots, A, B, C three-phase windings current electrifying phase successively differ 60 degree, can produce travelling-magnetic-field magnetic
Flux density curve (17) controls traveling wave magnetic by the electric current and the size of frequency that adjust travelling-magnetic-field power control (9)
The distribution and pace of change of field magnetic flux density profile (17), and then to realize the electromagnetic field control to different cladding material molten baths；
Wherein positive negative pulse stuffing electric field arrangement is characterized in that connect lug (28) is fixed on electrode base board (18) by fixing bolt (13),
Due to being provided with groove on electrode base board (18), the position of spring supporting sleeve (23) can be adjusted along cladding direction, Jin Erke
Adjust the distance d between two wheel electrodes1；Lower spring cup and spring cross by spring compression in stop sleeve (23) compress pylon
(27) between, the adjusting of pressing force of the spring is realized by adjusting the screwing length of screw thread on fastening nut and electrode column, in turn
Wheel electrode is adjusted to cladding layer pressing force；Circuit uses positive negative pulse stuffing power supply (22), by cable by wheel electrode (27), base
Material workpiece, positive negative pulse stuffing power supply (22) constitute a circuit, by adjusting the size of positive negative pulse stuffing supply voltage and frequency, change
Act on the size of the electric current in molten bath and frequency in cladding process.
2. set composite according to claim 1, wherein positive negative pulse stuffing electric field arrangement device fixed character be connecting plate,
Laser and numerical control device are bolted together, and can adjust the distance between two wheel electrodes d1And wheel electrode is to cladding
The pressure of layer realizes adjusting of the positive negative pulse stuffing electric field arrangement to the follow-up action and current strength, roller compression degree in molten bath.
3. set composite according to claim 1, wherein the distance d between two wheel electrodes1For 20~40mm, two electrodes are crossed
The positive pulse current amplitude i of substrate between idler wheel1For 2~12kA, because positive negative pulse stuffing is symmetrical, negative pulse amplitude is -12~-2kA,
Cycle T is 0.02~0.005s, and the electric frequency that respectively communicates of travelling-magnetic-field is 20~200Hz, each phase electrical current iA(or iB、iC)
For 2~10A, it is characterized in that it includes the following steps:
(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 positive negative pulse stuffing power supply is opened
It closes, adjusts the size of positive negative pulse stuffing supply voltage and frequency, positive negative impulse current is made to pass through the substrate between two wheel electrodes；
(3) after being stablized by the positive negative impulse current of substrate, travelling-magnetic-field power control is opened, laser is then started
The cladding apparatus such as device, powder feeder and numerical control device carry out cladding using conventional laser cladding technological parameter；
(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
And positive negative pulse stuffing power supply device, cladding completion workpiece is placed in air or annealing device and is cooled to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810510930.XA CN110527999A (en) | 2018-05-24 | 2018-05-24 | A kind of impulse electric field-travelling-magnetic-field complex method reducing re-melt deposit welding |
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| CN201810510930.XA CN110527999A (en) | 2018-05-24 | 2018-05-24 | A kind of impulse electric field-travelling-magnetic-field complex method reducing re-melt deposit welding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388834A (en) * | 2021-05-31 | 2021-09-14 | 四川大学 | Double-process composite coating for metal valve and pipe fitting |
| CN113388833A (en) * | 2021-05-31 | 2021-09-14 | 四川大学 | Preparation method of erosion and wear resistant fluid valve part |
| CN113866554A (en) * | 2021-08-24 | 2021-12-31 | 武汉华瑞伏安电力科技有限公司 | Non-contact detection-based distributed fault positioning device and method for power transmission line |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388834A (en) * | 2021-05-31 | 2021-09-14 | 四川大学 | Double-process composite coating for metal valve and pipe fitting |
| CN113388833A (en) * | 2021-05-31 | 2021-09-14 | 四川大学 | Preparation method of erosion and wear resistant fluid valve part |
| CN113388833B (en) * | 2021-05-31 | 2022-06-03 | 四川大学 | Preparation method of erosion and wear resistant fluid valve part |
| CN113388834B (en) * | 2021-05-31 | 2022-06-03 | 四川大学 | Double-process composite coating for metal valve and pipe fitting |
| CN113866554A (en) * | 2021-08-24 | 2021-12-31 | 武汉华瑞伏安电力科技有限公司 | Non-contact detection-based distributed fault positioning device and method for power transmission line |
| CN113866554B (en) * | 2021-08-24 | 2024-07-09 | 武汉华瑞伏安电力科技有限公司 | Distributed fault positioning device and method for power transmission line based on non-contact detection |
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