CN108130527A - A kind of WC particle enhances composite coating - Google Patents
A kind of WC particle enhances composite coating Download PDFInfo
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- CN108130527A CN108130527A CN201611091798.0A CN201611091798A CN108130527A CN 108130527 A CN108130527 A CN 108130527A CN 201611091798 A CN201611091798 A CN 201611091798A CN 108130527 A CN108130527 A CN 108130527A
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- 238000000576 coating method Methods 0.000 title claims abstract description 70
- 239000011248 coating agent Substances 0.000 title claims abstract description 69
- 239000002245 particle Substances 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 45
- 229910000883 Ti6Al4V Inorganic materials 0.000 claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 230000008021 deposition Effects 0.000 claims abstract description 14
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 5
- 239000006185 dispersion Substances 0.000 claims abstract description 4
- 238000005728 strengthening Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 14
- 238000000151 deposition Methods 0.000 claims description 12
- 230000002708 enhancing effect Effects 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 239000011812 mixed powder Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000012159 carrier gas Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 244000137852 Petrea volubilis Species 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 231100000241 scar Toxicity 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 239000000470 constituent Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000006061 abrasive grain Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000006199 nebulizer Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 1
- 229910033181 TiB2 Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000005049 combustion synthesis Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of WC particle enhances composite coating, and in order to improve the antiwear characteristic of Ti6Al4V titanium alloys, the coating using WC particle as hardening constituent is prepared for using laser deposition in Ti6Al4V titanium alloy surfaces.WC particle reinforced phase even dispersion is distributed in the base, and part fusing has occurred in particle, is distributed from granular center to matrix and is showed different form and component.Due to the refined crystalline strengthening effect of the TiC dispersion-strengthernings and laser deposition matrix of not molten WC particles and generation, the hardness and wearability of base material are improved.Under the conditions of identical fretting wear, the volume wear of base material is 55. 2 times of composite coating.
Description
Technical field
The present invention relates to a kind of coated material more particularly to a kind of WC particle enhancing composite coatings.
Background technology
Ti6Al4V titanium alloy wear-resisting properties are poor, limit the performance of its performance potential.To improve the wear-resisting of titanium alloy
Property, carried out high-temperature carburizing and nitrided surface heat treatment, physical vapour deposition (PVD) and chemical vapor deposition hard wear-resistant layer and wait from
The researchs such as son spraying, however face coat and modification technology all Shortcomings are inevitably present in coating structure a certain amount of
Loose, micro-crack, hole the defects of, especially binding force is weak between coating and matrix, in contact mechanical stress and thermal stress
Interface obscission easily occurs under synergy.
It studies extensively at present and the composite layer of application mainly has carbide ceramics, oxide ceramics, nitride ceramics
And metallic compound etc., SiC, TiC, Al2O3、TiB2, the high rigidity ceramic phase such as WC application, obtain the wearability of coating
Very big raising.Laser melting and coating technique has been commonly used for preparing metal pottery due to the advantages that energy density is high, heat affected area is small
The obdurability of metal and ceramics excellent wear-resisting, corrosion resisting property are organically combined, significantly improve material by porcelain composite coating material
Wear-resisting property.But particles fuse and composite coating tearing tendency be greatly presently, there are main problem.Although by optimizing work
The methods of skill parameter, can improve problems of crack, but not solve the problems, such as inherently, and control composition graded is demonstrate,proved
Bright is a kind of effective means for solving cracking.And laser deposition molding technology is based on laser melting and coating technique and Quick-forming skill
Art, can be by accurately controlling the coaxial conveying of two or more material powders to realize material composition, heterogeneous microstructure and performance
Gradient distribution, avoid the technologies such as traditional powder metallurgic method, fusion casting, combustion synthesis method prepare coating there are apparent boundaries
The shortcomings that face, easily generation spalling damage.
Invention content
The purpose of the invention is to improve the wearability of Ti6Al4V titanium alloys, it is compound to devise a kind of WC particle enhancing
Coating.
The technical solution adopted by the present invention to solve the technical problems is：
The raw material for preparing of WC particle enhancing composite coating includes：Size is selected to be closed for the Ti6Al4V of 100mm × 60mm × 30mm
For gold as base material, deposition is spherical Ti6Al4V powder (granularity is 44-100 μm) and WC powder with material (granularity is 40-110 μm)
Mixed-powder.
WC particle enhancing composite coating preparation process be：Base material oxide layer is polished off with sand paper, is removed with alcohol washes
Two kinds of powder are respectively put into two feed bins of powder feeder by substrate surface impurity, by controlling the powder feeding rate of different powder cabins,
Each deposition layer component is made to change according to certain rules, it is 20% that the mass fraction of WC increases to last layer from the 0 of first layer.Shaping layer
Number is 6 layers, every layer of 1mm, and substrate and powder are dried 5h in 150 DEG C of vacuum driers.Experiment is 5kW power with laser
CO2Cross-flow laser, the vacuum degree of inert gas dynamic protection system is up to 10-2Pa fills purity for 99.99% argon gas, and oxygen contains
Amount<5×10-5.Laser processing technology parameter be laser power 1800-2100W, focal length 300mm, sweep speed 2-10mm/s, together
Axis powder feed rate 3g/min, multi-track overlapping rate 33%, nebulizer gas pressure 0.2MPa, carrier gas flux 3L/min.
WC particle enhancing composite coating detecting step be：Using SSX-550 types scanning electron microscope (SEM) and OLYMPUS-
DP71 types light microscope (OM) analyzes the tissue of gradient composite coating.Sample hardness is detected with MVK-300 types microhardness testers,
Pressure head is positive rectangular pyramid diamond, and load counterweight is 100g, tests power retention time 20s.Wear test is in SRV-3 fretting wears
It is carried out in experimental machine, secondary to mill is GCr15 steel balls, and condition is atmosphere at room temperature dry Sliding Friction Wear.With the wear scar volumes of sample
To characterize the wear-resisting property of coating.Base material and sample be respectively adhered on thickness after specimen surface is ground smooth, cleaning during experiment
It spends and carries cylinder upper surface center for the experimental machine of 5mm.
Described uses laser deposition molding technique to be prepared for the composite coating using WC particle as reinforced phase.It is microcosmic
Fabric analysis finds that WC particle even dispersion is distributed on Ti6Al4V matrixes, and WC particle is presented part and melts state, is closed with titanium
The TiC phases of generation are found in the interface of the matrix of gold, show that the two is metallurgical binding.
The microhardness of the WC particle enhancing composite coating is analysis shows that gradient ascendant trend is presented in coating hardness, firmly
Degree is maintained between HV390-460.
The WC particle enhancing composite coating is due to not molten WC particle and the TiC dispersion-strengthernings of generation and laser deposition base
The refined crystalline strengthening effect of body tissue, base material wearability are significantly improved.Under atmosphere at room temperature DRY SLIDING, coating and
The wear volume ratio of base material is 1/55.2.The wear mechanism of coating is peeled off based on abrasive wear along with a small amount of bonding.
The beneficial effects of the invention are as follows：
It is wear-resisting compound as titanium-based using high rigidity, dystectic WC particle in order to improve the wear-resisting property of Ti6Al4V titanium alloys
The reinforced phase of coating prepares the coating of good metallurgical binding on substrate surface, realizes that its is micro- by the way that material composition is controlled to form
The gradient distribution of tissue is seen, so as to eliminate conventional composite materials macroscopic interface, the continuous transition of base material and coating material is realized, makes
Material property changes in gradient.
Specific embodiment
Case study on implementation 1：
The raw material for preparing of WC particle enhancing composite coating includes：Size is selected to be closed for the Ti6Al4V of 100mm × 60mm × 30mm
For gold as base material, deposition is spherical Ti6Al4V powder (granularity is 44-100 μm) and WC powder with material (granularity is 40-110 μm)
Mixed-powder.WC particle enhancing composite coating preparation process be：Base material oxide layer is polished off with sand paper, is removed with alcohol washes
Two kinds of powder are respectively put into two feed bins of powder feeder by substrate surface impurity, by controlling the powder feeding rate of different powder cabins,
Each deposition layer component is made to change according to certain rules, it is 20% that the mass fraction of WC increases to last layer from the 0 of first layer.Shaping layer
Number is 6 layers, every layer of 1mm, and substrate and powder are dried 5h in 150 DEG C of vacuum driers.Experiment is 5kW power with laser
CO2Cross-flow laser, the vacuum degree of inert gas dynamic protection system is up to 10-2Pa fills purity for 99.99% argon gas, and oxygen contains
Amount<5×10-5.Laser processing technology parameter be laser power 1800-2100W, focal length 300mm, sweep speed 2-10mm/s, together
Axis powder feed rate 3g/min, multi-track overlapping rate 33%, nebulizer gas pressure 0.2MPa, carrier gas flux 3L/min.WC particle enhances compound painting
Layer detecting step be：Using SSX-550 types scanning electron microscope (SEM) and OLYMPUS-DP71 types light microscope (OM) analysis ladder
Spend the tissue of composite coating.With MVK-300 types microhardness testers detect sample hardness, pressure head be positive rectangular pyramid diamond, load
Counterweight is 100g, tests power retention time 20s.Wear test carries out on SRV-3 friction and wear testers, is to mill pair
GCr15 steel balls, condition are atmosphere at room temperature dry Sliding Friction Wear.The wear-resisting property of coating is characterized with the wear scar volumes of sample.
During experiment by specimen surface grind it is smooth, cleaning after by base material and sample be respectively adhered on thickness be 5mm experimental machine carry circle
Cylinder upper surface center.
Case study on implementation 2：
With the increase of WC particle content in mixed-powder, distribution of particles density also accordingly increases in matrix.WC particle is from center
Tissue topography to coated substrate gradually changes, in composite coating preparation process, in mixed-powder Ti6Al4V powder by
It is low compared with WC particle in fusing point, fusing occurs first and forms molten bath, WC particle can be in titanium under high energy laser beam and molten bath effect
Be partly dissolved in alloy melt (because absorb laser energy difference, melt degree and pattern it is different), so as to make W elements and
C element is spread into molten bath, forms C layers of richness W richnesses.But since Ti belongs to carbide, it is much larger than with the affinity of C
W, Ti and C have blocked the diffusions of W elements with reference to TiC layer is formed quickly, so as to enhance the wetability of particle and matrix, are formed
Strong metallurgical combination.Due to the fast hot rapid cooling feature of laser deposition molding technology, high-melting-point WC particle has had little time in molten bath
Running down, so as to effectively control the C element and W elements dissolved in molten bath.
Case study on implementation 3：
Gradient rising is presented in microhardness from base material to coating, and base material is about HV330 or so, and coating hardness is maintained at HV390-
Between 460, the microhardness stabilization of coating shows that it has uniform mechanical property in same thickness region, is conducive to coating and exists
It keeps stablizing when being acted on by external force.It is significantly improved in the microhardness of the coating at matrix 1.5mm distances, it may be possible to by
In the coating nearer apart from matrix, since molten bath bottom degree of supercooling is excessive, cause molten bath that strong convection current occurs and makes undissolved
WC locally sink to the bottom caused by, the temperature gradient in coating afterwards due to molten bath is gradually reduced, WC particle distribution tend to be equal
Uniform dispersion, the hardness of coating gradually enhance with the increase of WC particle amount.The main reason for coating acquisition high rigidity is base
The a large amount of WC not being melted of the Dispersed precipitate and TiC of a small amount of generation in body；Particulates reinforcements are in the process for undertaking load
In play the role of " skeleton ", assume responsibility for main load, enhance the wear-resisting property of coating.There is preferable wetting with matrix in WC
Property, interface bond strength is higher, avoids metal phase and the strong interfacial reaction of ceramic phase, reduces the several of ceramic particle peeling
Rate makes the wearability of coating obtain apparent reinforcing.And the plastic deformation of material is then mainly completed by matrix, and WC can be overcome tough
The advantages of such coating of the shortcomings that property is poor just combines the obdurability of metal material and ceramic material high rigidity.In addition, laser sinks
Product forming is the process of a quick heating and cooling, and the geneva that rapid solidification structure is fine uniform is obtained after sedimentary cooling
Body tissue produces refined crystalline strengthening effect.In conclusion the reinforcing of coating mainly has：Reinforcement carrying, matrix grain refinement.
Case study on implementation 4：
In entire wear process, the friction coefficient of base material changes over time more apparent, is presented gradually increased trend, and coating
Friction coefficient change over time gently, wear initial stage, the friction coefficient of base material is rapidly increased to 0.85 from 0.5, rubs into stabilization
After step section, the friction coefficient of base material is maintained between 0.75-0.85, and (5min) is fast within a short period of time for coating friction coefficient
Speed enters the stabilization sub stage, is always held between 0.9-0.95 in this stage, and fluctuates small compared with base material.In identical atmosphere at room temperature
Dry friction is slided, load 20N, vibration frequency 10Hz, under the conditions of single direction stroke 1mm, time 0.5h, the volume wear of base material
For 0.127mm3, coating volume wear is 0.0023mm3, the volume wear of base material is 55.2 times of coating, shows that coating is resistance to
It grinds functional.The worn surface SEM photograph of Ti6Al4V base materials and coating.It can be seen that substrate surface be covered with it is deep mixed
Ditch dug with a plow, there are apparent plastic deformation, the strip bright band in polishing scratch is the plasticity that titanium alloy generates under higher contact stress
Boundary during extension.Occur more white chip shape or graininess abrasive grain on surface, be the characteristic feature of abrasive wear.
Case study on implementation 5：
Due to Ti6Al4V, processing hardening is more serious in friction process, under subsequent friction and percussion, easily generates
Fatigue crack is simultaneously extruded tear, and sheet abrasive dust is formed after disengaging, in addition hard-phase particles of disengaging etc. are in the secondary contact zone of friction
Domain forms harder abrasive grain, so as to form apparent ditch dug with a plow.And coating abrasion surface is relatively smooth, is dispersed with tiny draw
Trace and some particles to come off, without apparent plastic deformation and peel off, show the feature of abrasive wear.Coat inside and painting
Layer is firmly combined with matrix, and WC particle is not easy to fall off in friction process or peels off, and the friction and wear behavior on surface is carried
It is high.But there is one layer of adhesion layer on coating, the main component of adhesion layer is Fe and O, it is possible thereby to infer, adhesion layer is to grind
By being transferred on coating surface to the material on bull ring during damage, show that face coat has the secondary material to mill in friction process
The transfer of material；And the presence of oxygen element shows in wear process along with certain oxidation.
Claims (4)
1. a kind of WC particle enhances composite coating, prepare raw material and include：Size is selected as 100mm × 60mm × 30mm's
For Ti6Al4V alloys as base material, deposition is that (granularity is for spherical Ti6Al4V powder (granularity is 44-100 μm) and WC powder with material
40-110 μm) mixed-powder.
2. WC particle according to claim 1 enhances composite coating, it is characterized in that the preparation of WC particle enhancing composite coating
Step is：Base material oxide layer is polished off with sand paper, substrate surface impurity is removed with alcohol washes, two kinds of powder is respectively put into and are sent
Two feed bins of powder device by controlling the powder feeding rate of different powder cabins, make each deposition layer component change according to certain rules, the matter of WC
It is 20% that amount score increases to last layer from the 0 of first layer, and the forming number of plies is 6 layers, every layer of 1mm, by substrate and powder at 150 DEG C
5h is dried in vacuum drier, experiment is 5kW power CO with laser2Cross-flow laser, inert gas dynamic protection system
Vacuum degree is up to 10-2Pa fills purity for 99.99% argon gas, oxygen content<5×10-5, laser processing technology parameter is laser work(
Rate 1800-2100W, focal length 300mm, sweep speed 2-10mm/s, coaxial powder-feeding speed 3g/min, multi-track overlapping rate 33%, carrier gas
Pressure 0.2MPa, carrier gas flux 3L/min.
3. WC particle according to claim 1 enhances composite coating, it is characterized in that the detection of WC particle enhancing composite coating
Step is：It is applied using SSX-550 types scanning electron microscope (SEM) and OLYMPUS-DP71 types light microscope (OM) analysis graded composite
The tissue of layer detects sample hardness with MVK-300 types microhardness testers, and pressure head is positive rectangular pyramid diamond, and load counterweight is
100g tests power retention time 20s, and wear test carries out on SRV-3 friction and wear testers, and secondary to mill is GCr15 steel balls,
Condition is atmosphere at room temperature dry Sliding Friction Wear, characterizes the wear-resisting property of coating with the wear scar volumes of sample, and when experiment will examination
Sample surface grinding is smooth, base material and sample are respectively adhered on the experimental machine that thickness is 5mm after cleaning carries cylinder upper surface
Center.
4. WC particle according to claim 1 enhances composite coating, it is characterized in that being prepared using laser deposition molding technique
Using WC particle as the composite coating of reinforced phase, Analysis on Microstructure finds that WC particle even dispersion is distributed in Ti6Al4V
On matrix, WC particle is presented part and melts state, in the TiC phases with finding generation in the interface of the matrix of titanium alloy, shows two
Person is metallurgical binding, microhardness analysis shows that coating hardness is presented gradient ascendant trend, hardness be maintained at HV390-460 it
Between, due to the refined crystalline strengthening effect of the TiC dispersion-strengthernings and laser deposition matrix of not molten WC particle and generation, base material is wear-resisting
Property be significantly improved, under atmosphere at room temperature DRY SLIDING, the wear volume ratio of coating and base material is 1/55.2, coating
Wear mechanism based on abrasive wear, peeled off along with a small amount of bond, in order to improve the wearability of Ti6Al4V titanium alloys
Can, using the reinforced phase of high rigidity, dystectic WC particle as the wear-resisting composite coating of titanium-based, prepare on substrate surface good
The coating of metallurgical binding realizes that the gradient of its microstructure is distributed, so as to eliminate conventional composite by the way that material composition is controlled to form
Material macroscopic interface realizes the continuous transition of base material and coating material, material property is made to change in gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091798.0A CN108130527A (en) | 2016-12-01 | 2016-12-01 | A kind of WC particle enhances composite coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091798.0A CN108130527A (en) | 2016-12-01 | 2016-12-01 | A kind of WC particle enhances composite coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109929986A (en) * | 2019-03-08 | 2019-06-25 | 安徽信息工程学院 | A kind of composite material and preparation method |
| WO2024255301A1 (en) * | 2023-06-12 | 2024-12-19 | 佛山桃园先进制造研究院 | Tc4 titanium alloy surface composite wear-resistant coating and preparation method therefor |
-
2016
- 2016-12-01 CN CN201611091798.0A patent/CN108130527A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109929986A (en) * | 2019-03-08 | 2019-06-25 | 安徽信息工程学院 | A kind of composite material and preparation method |
| WO2024255301A1 (en) * | 2023-06-12 | 2024-12-19 | 佛山桃园先进制造研究院 | Tc4 titanium alloy surface composite wear-resistant coating and preparation method therefor |
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