CN108505034A - A kind of enhanced ceramic Ni base composite coating and preparation method thereof - Google Patents
A kind of enhanced ceramic Ni base composite coating and preparation method thereof Download PDFInfo
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- CN108505034A CN108505034A CN201810298249.3A CN201810298249A CN108505034A CN 108505034 A CN108505034 A CN 108505034A CN 201810298249 A CN201810298249 A CN 201810298249A CN 108505034 A CN108505034 A CN 108505034A
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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
The present invention provides enhanced ceramic Ni base composite coatings and preparation method thereof, non- powdered nickel-containing alloys raw material and ceramic powder are deposited on basis material by the present invention using laser cladding, on basis material formed enhanced ceramic Ni base composite coating, wherein in non-powdered nickel-containing alloys raw material nickel mass percentage >=30%.Method provided by the invention, deposition process uses non-powdered nickel-containing alloys raw material and ceramic powder, it avoids using laser melting conventional raw materials alloy powder, and then avoids the tissue caused by easy ting produce stomata and crackle during deposition imperfect, reduce the corrosion resistance of coating.The embodiment of the present invention the result shows that, there is no a crackle and hole according to the composite coating that technical scheme obtains, tissue is complete.
Description
Technical field
The invention belongs to composite coating technology field more particularly to a kind of enhanced ceramic Ni base composite coating and its preparations
Method.
Background technology
Laser cladding technology is allowed to and base material by adding coating material in substrate surface using the laser beam of high-energy-density
Skin layer consolidation together, in the deposition face coat that substrate surface is formed with base is metallurgical binding, being one kind having energy
The process for modifying surface for the advantages that density is high, heat input is low, cooling velocity is fast, has been widely used in aerospace field.
Widely used metal based alloys powder is as deposition material in current laser cladding research, but metal alloy
The use of powder is easy due to the unstability during the compactness and laser cladding of powder particle during deposition
Stomata and crackle are generated, causes tissue imperfect, reduces the corrosion resistance of coating.
Invention content
In view of this, the purpose of the present invention is to provide a kind of enhanced ceramic Ni base composite coating and preparation method thereof,
Preparation method provided by the invention can effectively reduce the generation of the stomata and crackle inside overlay, and obtained composite coating is resistance to
It loses functional.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical scheme：
The present invention provides a kind of preparation method of enhanced ceramic Ni base composite coating, using laser cladding by non-powder
Shape nickel-containing alloys raw material and ceramic powder are deposited on basis material, and the Ni-based compound painting of enhanced ceramic is formed on basis material
Layer, mass percentage >=30% of nickel in the non-powdered nickel-containing alloys raw material.
Preferably, the non-powdered nickel-containing alloys are nickel-containing alloys welding wire；The quality of nickel in the nickel-containing alloys welding wire
Percentage composition >=55%.
Preferably, the non-powdered nickel-containing alloys raw material and ceramic powder are sent into laser cladding region simultaneously；It is described nickeliferous
The feeding speed of alloy welding wire is 2~2.8m/min, a diameter of 0.8~1.6mm of the nickel-containing alloys silk；The ceramic powder
Feeding speed is 3~7g/min.
Preferably, the ceramic powder is sent into direction with plane where basis material into 30~50 degree；The nickel-containing alloys
It is vertical with plane where basis material to be sent into direction.
Preferably, the grain size of the ceramic powder is 6~10 μm, and the ceramic powder is TiC powder, WC powder, TiB powder or Cr3C2
Powder.
Preferably, the power of the laser cladding is 1400~2800W, the sweep speed of laser cladding is 0.28~
0.42m/min。
Preferably, the light beam of the laser cladding is circle, a diameter of 0.2~0.4mm of the light beam.
Preferably, described matrix material is austenitic stainless steel, ferritic stainless steel, martensitic stain less steel or low-carbon alloy
Steel.
The present invention provides the enhanced ceramic Ni base composite coating that preparation method described in above-mentioned technical proposal is prepared,
Including nickel austenite phase and the ceramic enhancement phase for being distributed in the grain boundaries of crystal grain in nickel austenite phase.
Preferably, the volume ratio of the nickel austenite phase and ceramic enhancement phase is 3:1.
The present invention provides the preparation method of enhanced ceramic Ni base composite coating, powdered contained non-using laser cladding
Nickel alloy raw material and ceramic powder are deposited on basis material, and enhanced ceramic Ni base composite coating is formed on basis material,
In in non-powdered nickel-containing alloys raw material nickel mass percentage >=30%.Method provided by the invention, deposition process use
Non- powdered nickel-containing alloys raw material and ceramic powder are avoided using laser melting conventional raw materials alloy powder, and then are avoided molten
The tissue easy tod produce caused by stomata and crackle during applying is imperfect, reduces the corrosion resistance of coating.The present invention uses silk powder
Mixed deposition mode, since the high efficiency of wire feed deposition itself and high spreadability are excellent while ensureing the excellent properties of overlay
Gesture can significantly improve the tissue integrity of overlay.The embodiment of the present invention the result shows that, obtained according to technical scheme
To composite coating there is no a crackle and hole, tissue is complete.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is laser cladding process schematic of the present invention；
Fig. 2 is wire feed easy device structural schematic diagram of the present invention；
Fig. 3 is the super depth of field micrograph of overlay microstructure in the embodiment of the present invention 1；
Fig. 4 is 1 overlay microstructure scanning electron microscope (SEM) photograph of embodiment；
Fig. 5 is 1 overlay microstructure elemental scan figure of embodiment；
Fig. 6 is overlay macroscopic cross section shape appearance figure during 1 deposition of embodiment；
Fig. 7 is the optical microscope of overlay and base material combined area after 1 single pass deposition of embodiment；
Fig. 8 is EBSD (electron backscatter diffraction) testing result figure for the coating that embodiment 1 and comparative example 1 obtain.
Specific implementation mode
The present invention provides a kind of preparation method of enhanced ceramic Ni base composite coating, using laser cladding by non-powder
Shape nickel-containing alloys raw material and ceramic powder are deposited on basis material, and the Ni-based compound painting of enhanced ceramic is formed in substrate material surface
Layer, mass percentage >=30% of nickel in the nickel-containing alloys.
Non- powdered nickel-containing alloys raw material and ceramic powder are deposited on basis material by the present invention using laser cladding, in base
Enhanced ceramic Ni base composite coating is formed on body material.
The present invention does not have particular/special requirement to the source of described matrix material, the metal material for passing through surface peening with any need
Material.In the present invention, described matrix material be preferably austenitic stainless steel, ferritic stainless steel, martensitic stain less steel or
Low-carbon alloy steel；The austenitic stainless steel is more preferably 316L stainless steels.The present invention is to the austenitic stainless steel, iron
The specific source of ferritic stainless steel, martensitic stain less steel and low-carbon alloy steel does not have particular/special requirement, using those skilled in the art
It is known.
Present invention preferably employs sand paper to polish to described matrix material, the oxygen for removing described matrix material surface
Change layer；The present invention does not have particular/special requirement to the polishing mode, using polishing mode well-known to those skilled in the art,
In an embodiment of the present invention, specifically granularity is used to polish described matrix material for the sand paper of 200 mesh.
After completing polishing, present invention preferably employs acetone to clean described matrix material；The present invention is to the cleaning
Mode there is no particular/special requirement, be so that clean basis material can be obtained.After obtaining clean basis material, the present invention is excellent
Described matrix material is dried in choosing.
In the present invention, in the non-powdered nickel-containing alloys raw material nickel mass percentage >=55%, preferably >=
60%, further preferably 60~80%.On element composition, in terms of mass percentage, the nickel-containing alloys preferably include
Nickel >=55wt.%, Cr19~25wt.% and surplus element；On element composition, in terms of mass percentage, the nickeliferous conjunction
Golden further preferably includes Cr 20~23%, Ni >=58%, Mo 8~10%, Nb 3.15~4.15%, Mn≤0.5%, Co
≤ 1%, Si≤0.5% and Fe≤5%.
In the present invention, the non-powdered nickel-containing alloys raw material is preferably nickel-containing alloys welding wire；The nickel-containing alloys weldering
Silk further preferably because section like this 625 welding wire of alloy (625 welding wires of Inconel), because of section's 718 welding wire of alloy like this
(718 welding wires of Inconel), because of section alloy 800 welding wire (800 welding wires of Inconel) or 600 welding wire of Xite like this
(600 welding wires of Incoloy).In the present invention, the diameter of the nickel-containing alloys welding wire is preferably 0.8~1.6mm, further excellent
It is selected as 0.9~1.5mm, more preferably 1.0~1.2mm.The present invention is not special to the specific source of the nickel-containing alloys welding wire
It is required that using commercial goods well-known to those skilled in the art.
In the present invention, the grain size of the ceramic powder is preferably 6~10 μm, further preferably 6.5~9.5 μm, more excellent
It is selected as 7~8 μm；The ceramic powder is preferably TiC powder, WC powder, TiB powder or Cr3C2Powder.The present invention is specific to the ceramic powder
Source does not have particular/special requirement, using commercial goods well-known to those skilled in the art.
After obtaining described matrix material, non-powdered nickel-containing alloys raw material and ceramic powder, the present invention will using laser cladding
The non-powdered nickel-containing alloys raw material and ceramic powder are deposited on basis material, and enhanced ceramic nickel is formed on basis material
Base composite coating.Non- powdered nickel-containing alloys raw material and ceramic powder are deposited on basis material by the present invention using laser cladding,
It avoids using alloy powder, improves stock utilization, and combine the advantage and ceramics of laser cladding high efficiency high quality
Powder enhances advantage, and ceramic powder ensure that the extra-strong corrosion resistant and height of nickel-containing alloys while promoting composite coating mechanical property
It is excellent under the conditions of temperature stretch, the performance of bending and fatigue behaviour, and then ensure to obtain mechanical property and corrosion resistance is all good
Composite coating.
In the present invention, the non-powdered nickel-containing alloys raw material and ceramic powder are preferably sent into laser cladding region simultaneously；
The non-powdered nickel-containing alloys raw material is sent into the form of nickel-containing alloys welding wire described in preceding solution, the nickel-containing alloys
The feeding speed of welding wire is preferably 2~2.8m/min, further preferably 2.5m/min；The feeding speed of the ceramic powder is preferred
For 3~7g/min, further preferably 5~6g/min.The present invention is melted by the way that nickel-containing alloys and ceramic powder are sent into laser simultaneously
Apply region so that during laser cladding, nickel-containing alloys fusing synchronous with ceramic powder, the two fully merges, and forms fine and close apply
Layer.In the present invention, the feeding position of the nickel-containing alloys welding wire and ceramic powder is preferably identical；The nickel-containing alloys welding wire is sent into
Feeding position with ceramic powder is preferably 3~5mm at a distance from substrate material surface.
In the present invention, the ceramic powder is sent into direction preferably with plane where basis material at 30~50 degree, further
Preferably 45 degree；In the present invention, the ceramic powder is sent into the control of the angle of direction and basis material, helps to ensure ceramics
Powder swimmingly enters laser cladding region (molten bath).In the present invention, the ceramic powder is preferably sent into direction side to be deposited.
In the present invention, the feeding direction of the nickel-containing alloys is preferably vertical with plane where basis material.
In the present invention, the light beam of the laser cladding is preferably circular, and the diameter of the light beam is preferably 0.2~
0.4mm, further preferably 0.25~0.3mm.The present invention preferably send the non-powdered nickel-containing alloys raw material and ceramic powder
Enter in the hot spot that the light beam is formed, helps to ensure non-powdered nickel-containing alloys raw material deposition synchronous with ceramic powder, favorably
In powder, abundant Dispersed precipitate, reinforcement overlay entirety uniformity promote powder reinforced effect so that in overlay in molten bath
Include nickel-containing alloys phase and ceramic enhancement phase simultaneously.As shown in Figure 1, the nickel-containing alloys welding wire is perpendicular to described matrix material institute
In plane, and the end of the nickel-containing alloys welding wire is in hot spot；The ceramic powder is by powder feeding rifle in direction to be deposited
Side is fed through in hot spot.
In the present invention, the ceramic powder is preferably sent into the laser cladding region by powder feeding rifle；The present invention is to described
The concrete model of powder feeding rifle does not have particular/special requirement, using well-known to those skilled in the art.In the present invention, described non-
Powdered nickel-containing alloys raw material is preferably sent into the laser cladding region by wire feed rifle；Model of the present invention to the wire feed rifle
There is no particular/special requirement, using well-known to those skilled in the art.In the present invention, powder feeding rifle outlet end and wire feed
The position of rifle filament mouth is identical.In an embodiment of the present invention, the present invention specifically uses coaxial wire feed laser head to realize nickeliferous conjunction
Regulate and control while gold solder silk and laser；In the present invention, the coaxial wire feed laser head can realize argon gas during wire feed
It is conveyed while protecting gas.Wire feed easy device structural schematic diagram, as shown in Figure 2；From Figure 2 it can be seen that wire feed easy device structure
Including wire feed rifle, powder feeding rifle and coaxial wire feed laser head, the wire feed rifle position is described on the central axes of coaxial wire feed laser head
Coaxial wire feed laser head projects laser, and wire feed rifle port provides protection gas simultaneously；The laser of the coaxial wire feed laser head projection
Laser cladding region is formed, the welding wire that the wire feed rifle provides is admitted to laser cladding region；The ceramics that the powder feeding rifle provides
Powder is also fed to laser cladding region.
The present invention is combined by coaxial wire feed and paraxonic powder feeding, ensures that silk powder synchronizes the effect of deposition, it is molten to reinforce wire feed
The stability for the process of applying ensures overlay quality, greatly improves coating surface surface smoothness and integrality, reduces overlay
Stomata, the crack defect of inside, improve the metallurgical binding of coating and substrate so that the composite coating that laser cladding obtains can not
It can directly be applied by polishing or following process.
In the present invention, the laser cladding direction is preferably same direction, avoids back and forth, being conducive to the superposition of overlay.
During laser cladding, present invention preferably employs the modes of inert gas to protect the deposition process, further excellent
It is selected as using Ar gas.In the present invention, the flow velocity of the inert gas is preferably 5L/min.
In the present invention, the laser cladding is preferably multi-pass deposition, specially：By the nickel-containing alloys and ceramic powder
During being sent into laser cladding region simultaneously, it is synchronous by the nickel-containing alloys and ceramic powder and laser cladding light beam to waiting swashing
Light deposition direction side moves, and carries out single pass deposition；After completing the single pass deposition, by the nickel-containing alloys and ceramic powder with
And laser cladding light beam, along after deposition direction moves a certain distance, the single pass carried out again described in aforementioned schemes is molten
It applies, multi-pass deposition is carried out with this.
The present invention does not have particular/special requirement to the number of the multi-pass deposition, so that substrate material surface all make pottery by covering
Subject to the enhanced Ni base composite coating of porcelain.
The non-powdered nickel-containing alloys raw material and ceramic powder are preferably sent into the mistake in laser cladding region by the present invention simultaneously
Cheng Zhong, it is synchronous by the non-powdered nickel-containing alloys raw material and ceramic powder and laser cladding light beam to waiting for laser cladding direction side
It is mobile, carry out single pass deposition.In the present invention, the item of the single pass deposition and the laser cladding described in preceding solution
Part is consistent, and details are not described herein.The present invention is by the non-powdered nickel-containing alloys raw material and ceramic powder and laser cladding light beam
To waiting in laser cladding direction side moving process, the present invention does not have particular/special requirement to the rate travel, molten according to the laser
Deposited sweep speed setting.In the present invention, the sweep speed of the laser cladding is preferably 0.28~0.42m/min,
Further preferably 0.3~0.4m/min.When the present invention completes single pass deposition, preferably first stop being sent into ceramic powder and nickeliferous conjunction
Gold turns off laser input, can ensure that nickel-containing alloys are completely melt.
After completing the single pass deposition, the present invention preferably by the non-powdered nickel-containing alloys raw material and ceramic powder and
Laser cladding light beam carries out the single pass deposition described in aforementioned schemes again along after deposition direction moves a certain distance,
Multi-pass deposition is carried out with this.In the present invention, the distance of the movement is preferably the corresponding mobile preceding single pass deposition completed
It is formed by the product that deposition width fixes Duplication with deposition.In the present invention, the deposition fixes Duplication according to deposition
Layer height and width determine, is subject to the overlay that can reach smooth；In an embodiment of the present invention, the deposition fixes overlapping
Rate is preferably 20~30%, and further preferably 25%.In the present invention, the single pass deposition is formed by deposition width value
It is preferred that after the deposition for completing corresponding passage, deposition width is measured to obtain；The present invention is to the measurement method without spy
It is different to require, using the measurement method well-known to those skilled in the art to deposition width.As shown in Figure 1, x is completion institute
After stating single pass deposition, the present invention is by the non-powdered nickel-containing alloys raw material and ceramic powder and laser cladding light beam along vertical
In the distance of deposition direction movement；W is that mobile preceding single pass deposition is formed by deposition width.
In the present invention, the power of the laser cladding is preferably 1400~2800W, further preferably 2000W.
The present invention does not have particular/special requirement, use well-known to those skilled in the art the equipment for implementing the laser cladding
Laser cladding equipment specially uses IPG YLR-4000 optical fiber lasers simultaneously in an embodiment of the present invention,
4000 wire-feed motors of Fronius TPS and domestic powder feeding machine；Laser head is preferably using the coaxial of fraunhofer companies of Germany production
Wire feed deposition laser head and control to the wire feed deposition laser head is realized by 6 shaft industrial robots of ABB.
When ceramic powder uses TiC powder, and non-powdered nickel-containing alloys raw material uses 625 alloy welding wires of Inconel, swashing
During light deposition, solidification forms austenite crystalline phase again after the fusing of 625 alloy welding wires of Inconel, TiC powder not with matrix material
Material reacts, and is present in process of setting in austenite grain grain boundaries, belongs to face-centred cubic structure, with austenitic structure phase
Together, it is used as heterogeneous forming core substrate in the process of setting after the fusing of 625 alloy welding wires of Inconel, promotes heterogeneous forming core, in turn
Promote crystal grain refinement, and then improves the intensity of composite coating；The present invention from microstructure angle consider, the dystectic pottery of micron order
Porcelain powder will not melt during laser cladding, and meeting Dispersed precipitate is in overlay nickel-base alloy after solidification.As heterogeneous
Forming core substrate promotes heterogeneous forming core to cause crystal grain refinement, and then promotes overlay overall mechanical properties.Here improving performance machine
Reason is substantially similar with the strengthening mechanism of TiC powder, and other powder are also possible to as reinforcing particle can be due to deposition process of setting
It is middle to promote nearly tiny different hardening constituents, strengthen overlay mechanical property.
The present invention also provides the Ni-based compound paintings of enhanced ceramic that preparation method described in above-mentioned technical proposal is prepared
Layer includes the ceramic enhancement phase of nickel austenite phase and the grain boundaries for being distributed in nickel austenite phase crystal grain.In the present invention, institute
The volume ratio for stating nickel austenite phase and ceramic enhancement phase is preferably 3:1.In the present invention, nickel austenite is mutually used as matrix
Phase；Ceramic enhancement phase is distributed at the crystal particle crystal boundary of matrix phase, plays the role of intercrystalline strengthening, and then helps to improve compound painting
The intensity of layer.
Enhanced ceramic Ni base composite coating provided by the invention and preparation method thereof is carried out with reference to embodiment detailed
Thin explanation, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
Acetone cleaning, drying are used after 316L stainless steel plates are carried out sand paper polishing, as basis material, is fixed on work
On platform, using TiC powder and 625 alloy welding wires of Inconel as coating material, wherein the component of 625 alloy welding wires of Inconel
For Cr 20%, Ni 62%, Mo 8%, Nb 4%, Mn 0.3%, Co 0.2%, Si 0.5% and Fe 5%.By TiC powder
It is preset in powder feeding machine, adjustment powder feeding rifle angle and horizontal plane angle at 45 °, it is identical as wire feed rifle filament mouth at the top of powder feeding rifle, it is high
Degree ensures that powder feeding position and wire feed position are at hot spot apart from 3~5mm of substrate surface.Coating material and basis material are put
Seated position is as shown in Figure 1.
Deposition process uses argon atmosphere, gas flow 5L/min to be completed by the way of laser surface focusing
Laser and powder feeder are opened in laser melting, carry out surface deposited metal work using coaxial wire feed deposition plumb joint, welding wire is same with powder
When convey, first stop powder feeding wire feed after the single track coating deposition that is near completion, rear laser of closing ensures that welding wire is completely melt；It completes single
After road coating deposition, by laser position after 75% or so the distance perpendicular to deposition direction translation overlay width, weight
Single layer laser cladding work is carried out again, ensures that the Duplication between per pass reaches 25%, until it is compound to complete covering substrate surface
The preparation of material coating, wherein the distance moved is the product of fixed Duplication and overlay width；Laser cladding all processes
Finishing last Ar gas shielded air-flows of closing prevents from aoxidizing.
Wherein in laser cladding laser power be 2000W, wire feed rate 2.8m/min, sweep speed 0.42m/min,
Powder sending quantity is 5g/min, and Duplication selects 25%.Composite coating is formed on basis material under conditions of this technological parameter.
Comparative example 1
In 316L stainless steel surface laser cladding of coating in the way of embodiment 1, difference lies in only by coaxial
625 alloy welding wires of Inconel are sent into deposition region by wire feed deposition plumb joint, obtain 625 alloy coats of pure Inconel.
Overlay carries out the micro- detection of the super depth of field of microstructure in the composite coating that embodiment 1 is prepared, as a result such as
Shown in Fig. 3.From the figure 3, it may be seen that in overlay TiC powder particle Dispersed precipitate.
Overlay carries out microstructure scanning electron microscope analysis, wherein microstructure in the composite coating obtained to embodiment 1
The results are shown in Figure 4 for electron-microscope scanning；The results are shown in Figure 5 for elemental line scan, and scan position runs through 2 TiC in line scanning process
Powder particle.By the control of Fig. 4 and Fig. 5 synthesis as it can be seen that the Elemental redistribution in overlay near TiC powder particle is mutation, do not have
There is apparent element transition area.
And overlay macroscopic cross section shape appearance figure in 1 cladding process of embodiment is as shown in fig. 6, it will be appreciated from fig. 6 that deposition process
In do not have hole crackle generation.And after completing single pass cladding, light microscopic figure such as Fig. 7 institutes of single layer overlay and base material combined area
Show, as shown in Figure 7, overlay does not have defect generation with base material combined area, there is good metallurgical binding between composite coating and base material.
EBSD (electron backscatter diffraction) is carried out to the coating that embodiment 1 and comparative example 1 obtain to detect, as a result such as Fig. 8 institutes
Show, wherein figure a~b is the ebsd test results of comparative example 1, figure c~d is the ebsd test results of embodiment 1.As shown in Figure 8,
Austenite grain is apparent in the coating that austenite grain is obtained compared to comparative example 1 in the composite coating that embodiment 1 is prepared
Refinement, average crystal grain reduce about 35%.
The mechanical property of the coating obtained to embodiment 1 and comparative example 1 is detected, wherein using using high-temperature and durable
Performance aircraft carries out tensile property test, and hardness determination is carried out using Vickers, the composite coating that embodiment 1 obtains
Tensile strength reaches 800MPa or more, compared to the tensile strength of 700~740MPa in comparative example 1, improves 14%；Embodiment 1
The hardness of obtained composite coating reaches 250~400HV, compared to the hardness of 200~250HV in comparative example 1, improves 48%.
As it can be seen that enhanced ceramic Ni base composite coating provided by the invention has higher tensile strength and case hardness.
Corrosion resistance detection carries out the corrosion resistance of dynamic potential scanning testing inspection sample material using electrochemical workstation.
In testing result, corrosion potential of the coating material in NaCl is -201mV, is slightly less than in 316L base materials (- 144.9mV), in addition,
Coating material is without apparent disruptive potential, and 316L base materials are breakdown in 507mV or so；In H2SO4, the corrosion electricity of coating material
Position is -201.6mV, and the slightly above corrosion potential (- 242.4mV) of 316L base materials, disruptive potential is similar.
The result of above example is it is found that the present invention ensures the superiority of overlay using the deposition mode of silk powder mixing
Since the high efficiency and height of wire feed deposition itself sprawl sexual clorminance while energy, the tissue that can significantly improve overlay is complete
Property, it avoids during directly using powder deposition technology that can lead to powder deposition, since powder particle is tiny, in molten bath in itself
Bond strength is low, and deposition drip molding will be difficult to avoid that real estate anger hole and crack defect in forming process, seriously affect deposition
The tissue integrity and overall performance of drip molding entirety；The complete enhanced ceramic of institutional framework provided by the invention is Ni-based multiple
Closing coating has higher tensile strength and case hardness.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of enhanced ceramic Ni base composite coating, using laser cladding by non-powdered nickel-containing alloys raw material
It is deposited on basis material with ceramic powder, forms enhanced ceramic Ni base composite coating on basis material, it is described non-powdered
Mass percentage >=30% of nickel in nickel-containing alloys raw material.
2. preparation method according to claim 1, which is characterized in that the non-powdered nickel-containing alloys weld for nickel-containing alloys
Silk；Mass percentage >=55% of nickel in the nickel-containing alloys welding wire.
3. preparation method according to claim 2, which is characterized in that the non-powdered nickel-containing alloys raw material and ceramic powder
It is sent into laser cladding region simultaneously；The feeding speed of the nickel-containing alloys welding wire is 2~2.8m/min, the nickel-containing alloys silk
A diameter of 0.8~1.6mm；The feeding speed of the ceramic powder is 3~7g/min.
4. wanting the preparation method described in 2 or 3 according to right, which is characterized in that the ceramic powder is sent into direction and basis material institute
In plane at 30~50 degree；The feeding direction of the nickel-containing alloys is vertical with plane where basis material.
5. preparation method according to claim 1, which is characterized in that the grain size of the ceramic powder is 6~10 μm, the pottery
Porcelain powder is TiC powder, WC powder, TiB powder or Cr3C2Powder.
6. preparation method according to claim 1, which is characterized in that the power of the laser cladding is 1400~2800W,
The sweep speed of laser cladding is 0.28~0.42m/min.
7. preparation method according to claim 1 or 6, which is characterized in that the light beam of the laser cladding is circle, described
A diameter of 0.2~0.4mm of light beam.
8. preparation method according to claim 1, which is characterized in that described matrix material is austenitic stainless steel, iron element
Body stainless steel, martensitic stain less steel or low-carbon alloy steel.
9. the enhanced ceramic Ni base composite coating that any one of claim 1~8 preparation method is prepared, including it is nickeliferous
Austenite phase and the ceramic enhancement phase for being distributed in the grain boundaries of crystal grain in nickel austenite phase.
10. the Ni-based compound cladding of enhanced ceramic according to claim 9, which is characterized in that the nickel austenite phase
Volume ratio with ceramic enhancement phase is 3:1.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852965A (en) * | 2019-03-15 | 2019-06-07 | 西安增材制造国家研究院有限公司 | A kind of Laser Overlaying and the compound laser melting coating processing head of powder feeding |
| CN110253029A (en) * | 2019-06-21 | 2019-09-20 | 燕山大学 | A kind of granule enhancement type pre-alloyed powder and the preparation method and application thereof |
| CN111485137A (en) * | 2020-05-19 | 2020-08-04 | 北京工业大学 | Preparation method of coating material for strengthening ocean lifting platform bolt oil cylinder rod |
| CN112222424A (en) * | 2020-09-09 | 2021-01-15 | 武汉数字化设计与制造创新中心有限公司 | Preparation method of particle reinforced metal composite material |
| CN112647076A (en) * | 2020-12-17 | 2021-04-13 | 浙江翰德圣智能再制造技术有限公司 | Preparation method of cobalt-based reinforced crack-free coating with excellent wear resistance and corrosion resistance |
| CN113061782A (en) * | 2021-03-16 | 2021-07-02 | 山东大学 | GH3230 nickel-based superalloy material, method for eliminating micro-cracks formed by selective laser melting and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852965A (en) * | 2019-03-15 | 2019-06-07 | 西安增材制造国家研究院有限公司 | A kind of Laser Overlaying and the compound laser melting coating processing head of powder feeding |
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| CN111485137A (en) * | 2020-05-19 | 2020-08-04 | 北京工业大学 | Preparation method of coating material for strengthening ocean lifting platform bolt oil cylinder rod |
| CN111485137B (en) * | 2020-05-19 | 2021-11-05 | 北京工业大学 | Preparation method of coating material for strengthening ocean lifting platform bolt oil cylinder rod |
| CN112222424A (en) * | 2020-09-09 | 2021-01-15 | 武汉数字化设计与制造创新中心有限公司 | Preparation method of particle reinforced metal composite material |
| CN112647076A (en) * | 2020-12-17 | 2021-04-13 | 浙江翰德圣智能再制造技术有限公司 | Preparation method of cobalt-based reinforced crack-free coating with excellent wear resistance and corrosion resistance |
| CN113061782A (en) * | 2021-03-16 | 2021-07-02 | 山东大学 | GH3230 nickel-based superalloy material, method for eliminating micro-cracks formed by selective laser melting and application thereof |
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