CN110408924A - It is a kind of for the titanium-based mixed-powder and manufacturing method of laser cladding coating and application - Google Patents
It is a kind of for the titanium-based mixed-powder and manufacturing method of laser cladding coating and application Download PDFInfo
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- CN110408924A CN110408924A CN201910780147.XA CN201910780147A CN110408924A CN 110408924 A CN110408924 A CN 110408924A CN 201910780147 A CN201910780147 A CN 201910780147A CN 110408924 A CN110408924 A CN 110408924A
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- titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0073—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only borides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Abstract
The invention discloses a kind of titanium-based mixed-powders for being used to prepare laser cladding coating, are related to laser melting and coating technique field, and titanium-based mixed-powder includes pure Ti and AlB2, wherein AlB2Mass percent be 15%-30%, remaining be pure Ti.The titanium-based mixed-powder is prepared by ball-milling technology, and TiB and Ti is generated in molten bath with Ti element during laser melting and coating process3Al Second Phase Particle, the Ti3Al Second Phase Particle and the Al element being solid-solubilized in α-Ti coated substrate generate Al in surface oxide layer with oxygen under high-temperature oxidation environment2O3.The titanium-based mixed-powder that the present invention develops meets requirement of the titanium alloy member surface to performances such as cladding layer high abrasion, resistance to high temperature oxidation, and flawless, stomata in laser cladding coating, the defects of being mingled with, hardness is up to 800HV0.3。
Description
Technical field
The present invention relates to laser melting and coating technique field more particularly to a kind of titanium-based mixed-powders for laser cladding coating
And manufacturing method and application.
Background technique
With the development of laser technology, laser melting and coating technique has been widely used in the modification of piece surface, mainly answers
With including improving its surface abrasion resistance, corrosion resistance, antioxygenic property etc..It is traditional with traditional case-carbonizing, thermal spraying etc.
Surface strengthening technology is different, and laser melting and coating technique utilizes high-energy, highdensity laser beam, keeps metal powder and substrate surface layer same
When melt, achieve the effect that coating and substrate form metallurgical bonding, while it is complete in matrix surface to obtain a kind of microstructure and property
Different from the surface peening cladding layer of substrate.Using laser melting and coating technique, substrate overall mechanical properties can cannot influenced
Under the premise of, the performance of substrate surface is improved, the service life of elongated component has good economic and social profit.
Titanium alloy due to good strength-to-weight ratio, excellent corrosion resistance etc., industrial circle each department
Through having obtained relatively broad application.However, since titanium alloy itself has, wearability is poor, oxidizable under high temperature lacks at present
It falls into and limits application of the titanium alloy member under abrasion or hot conditions.
So researching and developing the new titanium-based mixed-powder for being used to prepare high rigidity, oxidation resistant laser cladding coating
It is of great significance, titanium alloy can be greatly expanded in the application range of industrial circle, extend its service life, reduce complete cycle
Period cost.
Therefore, those skilled in the art is dedicated to developing a kind of matrix powder for laser cladding coating, Neng Gouti
Resistance to high temperature oxidation, hardness and the wearability of laser clad coating greatly extend titanium alloy in industrial circle and apply model
It encloses and prospect.
Summary of the invention
In view of the above drawbacks of the prior art, a kind of for mentioning the technical problem to be solved by the present invention is to how to find
The resistance to high temperature oxidation of laser clad coating, the matrix powder of hardness and wearability and the matrix powder is melted applied to laser
It covers in coating.
To achieve the above object, the present invention provides a kind of titanium-based mixed-powder for being used to prepare laser cladding coating, institutes
Stating titanium-based mixed-powder includes pure Ti and AlB2；The AlB2Mass percent be 15%-30%, remaining be the pure Ti.
Further, the shape of the titanium-based mixed-powder is subsphaeroidal.
Further, the partial size of the titanium-based mixed-powder is 75-150 μm.
The present invention also provides a kind of methods for manufacturing the titanium-based mixed-powder, are manufactured by ball-milling technology
At.
Further, the parameter of the ball-milling technology are as follows: ratio of grinding media to material 2-4:1；Revolving speed is 200-400 revs/min；Ball milling
Time is 120-180 minutes.
The present invention also provides a kind of application method of titanium-based mixed-powder in laser cladding coating, the coatings
Including the titanium-based mixed-powder.
Further, include the following steps；
Titanium alloy sheet is chosen as substrate；
It polishes the substrate；
Clean the substrate；
The titanium-based mixed-powder is coated in the substrate surface by laser melting coating system.
Further, the coating includes TiB and Ti3The Second Phase Particle of Al.
Further, the parameter setting of the laser melting coating system are as follows: scanning speed 4mm/s, laser power 2kW；
Powder feeding rate is 12g/min.
Further, the laser melting coating system works under protection of argon gas.
The principle of the present invention are as follows: during laser melting and coating process, original position occurs in molten bath for B, Al element and titanium elements
Reaction generates TiB and Ti3Al Second Phase Particle, and be more evenly distributed on α-Ti coated substrate.The TiB and Ti3Al
Second phase hard particles can play the role of disperse educt reinforcing, to improve the hardness of cladding layer, reach 800HV0.3Left and right.
In high-temperature oxidation environment, Ti3Al Second Phase Particle and the Al element being solid-solubilized in α-Ti can react with oxygen, so that table
There are a certain proportion of Al in the oxide layer of face2O3, so that oxidation film layer it is comparatively dense and and coating combination more closely, to mention
Rise high-temperature oxidation resistance.
Titanium-based mixed-powder of the invention carries out coated substrate compared with traditional matrix powder, through solid solution Al element
Solution strengthening improves the hardness of coated substrate；B, Al element is added, TiB and Ti are precipitated in the base3Al hardening constituent, these precipitations
The hardness of phase is much higher than matrix, and hard precipitated phase can occur reciprocation with dislocation, hinder the movement of dislocation, play dispersion-strengtherning
Effect, improve the hardness of coating to improve its wear-resisting property；Under high-temperature oxidation environment, Ti3Al Second Phase Particle and
The Al element being solid-solubilized in α-Ti can react with oxygen, so that there are a certain proportion of Al in surface oxide layer2O3, make to aoxidize
Film layer it is comparatively dense and and coating combination more closely, to promote high-temperature oxidation resistance.
The present invention selects added alloying substance by a large number of experiments, and optimizes tune to the content of selected species
Control, while optimizing laser cladding technological parameter, makes the laser cladding coating prepared while possessing excellent performance, surface with
Inside does not have the defects of crackle, stomata.Titanium-based mixed-powder of the invention and its application in laser cladding coating are from basic
On improve hardness, wearability and high temperature oxidation resistance in laser cladding coating, make up that improve titanium alloy itself existing
Two big performance deficiencies greatly expand application range and prospect of the titanium alloy in industrial circle.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is shape appearance figure of the titanium-based mixed-powder of a preferred embodiment of the invention at 100X；
Fig. 2 is shape appearance figure of the titanium-based mixed-powder of a preferred embodiment of the invention at 200X；
Fig. 3 is the macro morphology figure of the laser cladding coating sample of a preferred embodiment of the invention；
Fig. 4 is micro-organization chart of the laser cladding coating sample of a preferred embodiment of the invention under low power lens；
Fig. 5 is micro-organization chart of the laser cladding coating sample of a preferred embodiment of the invention under high power lens；
Fig. 6 is Ti in the laser cladding coating sample of a preferred embodiment of the invention3The crystal diffraction pattern of Al；
Fig. 7 is the crystal diffraction pattern of TiB in the laser cladding coating sample of a preferred embodiment of the invention；
Fig. 8 is the hardness distribution of the laser cladding coating sample of a preferred embodiment of the invention；
Fig. 9 is the coefficient of waste of the laser cladding coating sample of a preferred embodiment of the invention and the comparison diagram of TC4；
Figure 10 is the abrasion loss of the laser cladding coating sample of a preferred embodiment of the invention and the comparison diagram of TC4；
Figure 11 is pair of the high-temperature oxydation weight gain and TC4 of the laser cladding coating sample of a preferred embodiment of the invention
Than figure.
Specific embodiment
Multiple preferred embodiments of the invention are introduced below with reference to Figure of description, keep its technology contents more clear and just
In understanding.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention not only limits
The embodiment that Yu Wenzhong is mentioned.
As depicted in figs. 1 and 2, the titanium-based mixed-powder in the present embodiment is observed at 100X and 200X, shape
To be subsphaeroidal, partial size is between 75-150 μm, good fluidity, is suitable for laser melting coating.Wherein, titanium-based mixed-powder includes
Pure Ti and AlB2；AlB2Mass percent be 15%-30%, remaining be pure Ti.It is highly preferred that the present embodiment selects AlB2's
Mass percent is 20%.
Titanium-based mixed-powder in the present embodiment is prepared using ball-milling technology.Wherein, the milling parameters of optimization
Are as follows: ratio of grinding media to material 2-4；1, revolving speed is 200-400 revs/min, and Ball-milling Time is 120-180 minutes.
Application method of the titanium-based mixed-powder of the present embodiment in laser melting coating is described below.
The substrate that the present embodiment is selected is TC4 titanium alloy sheet.Substrate size is 200mm × 80mm × 20mm, substrate surface
It is polished before carrying out laser melting coating with abrasive machine, is then cleaned with acetone.AlB in the titanium-based mixed-powder of use2Quality
Percentage is 20%, remaining is Ti.
The present embodiment selects 8kW high-power semiconductor laser cladding system (Laserline LDF-8000) in titanium alloy table
Face carries out laser melting coating, and the laser melting coating parameter of selection is as follows: scanning speed 4mm/s, laser power 2kW, powder feeding rate is about
12g/min.Entire laser cladding process carries out under protection of argon gas, finally obtains desired surface covering.
It is described further below in the present embodiment using the confirmatory experiment of the laser cladding coating sample of titanium-based mixed-powder.
Friction-wear test, the friction pair of selection are corundum ceramic, test load 50N, revolving speed 200r/min, test period
For 60min.
After laser melting coating, obtained laser cladding coating thickness is in 1mm or so.
Fig. 3 shows the macro morphology figure of laser cladding coating sample, does not have crackle, gas in the laser cladding coating sample
The defects of hole is mingled with, cladding layer are well combined with substrate TC4.
As shown in Figure 4 and Figure 5, the laser cladding coating sample of the present embodiment is carried out respectively under low power lens and high power lens
Observation, microstructure are that TiB (hexagon, bulk, rodlike) and Ti is more evenly distributed on α-Ti matrix3Al (fine acicular)
Second Phase Particle.TiB and Ti3Al the second phase hard particles can play the role of disperse educt reinforcing, to improve laser melting coating
The hardness of coating sample, up to 800HV0.3Left and right.As shown in fig. 6, Ti3The crystal diffraction pattern of Al Second Phase Particle is shown as
Fine acicular.As shown in Figure 7, it is shown that the crystal diffraction pattern of block-like TiB Second Phase Particle.
Fig. 8 is the hardness distribution of laser cladding coating sample.As can be seen from Figure 8, hardness in laser cladding coating
Up to 930HV0.3, average hardness 804HV0.3, hardness 350HV much higher than substrate TC40.3。
Fig. 9 is the coefficient of waste of laser cladding coating sample and the comparison diagram of substrate TC4, and curve b indicates laser melting coating and applies
The coefficient of waste curve of layer sample, curve a indicate the coefficient of waste curve of substrate TC4.It can be seen that from the comparison of curve a and b
The coefficient of waste of laser cladding coating sample is 0.29 or so, the coefficient of waste 0.65 far below substrate TC4.
Figure 10 shows the abrasion loss of laser cladding coating sample and the comparison diagram of substrate TC4, and the histogram that a is represented represents
The abrasion loss of substrate TC4, the histogram that b is represented represent the abrasion loss of coating sample.It can be seen from the figure that laser cladding coating
Abrasion loss of the sample under same experiment condition is significantly less than substrate TC4, and it is good resistance to thus to prove that laser cladding coating has
Polishing machine.
Figure 11 shows the comparison diagram of the high-temperature oxydation weight gain and substrate TC4 of laser cladding coating sample.Wherein, c is represented
Oxidation weight gain curve of the laser cladding coating sample at 650 DEG C, d represent oxidation weight gain of the laser cladding coating sample at 700 DEG C
Curve, e represent oxidation weight gain curve of the laser cladding coating sample at 750 DEG C, and f represents laser cladding coating sample at 800 DEG C
Oxidation weight gain curve, g represents oxidation weight gain curve of the substrate TC4 at 650 DEG C, and h represents substrate TC4 and increases in 700 DEG C of oxidation
Weight curve, i represent oxidation weight gain curve of the substrate TC4 at 750 DEG C, and j represents oxidation weight gain curve of the substrate TC4 at 800 DEG C.From
As can be seen that gain in weight of the laser cladding coating sample under same experiment condition is significantly less than substrate TC4 in figure, it was demonstrated that laser
Cladding coating sample has good high-temperature oxidation resistance.Due in high-temperature oxidation environment, Ti3The second phase of Al and solid solution
Al element in α-Ti can react with oxygen, so that there are a certain proportion of Al in surface oxide layer2O3, make oxidation film layer
It is comparatively dense and and coating combination more closely, to promote its high-temperature oxidation resistance.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of titanium-based mixed-powder for being used to prepare laser cladding coating, which is characterized in that the titanium-based mixed-powder includes
Pure Ti and AlB2；The AlB2Mass percent be 15%-30%, remaining be the pure Ti.
2. titanium-based mixed-powder as described in claim 1, which is characterized in that the shape of the titanium-based mixed-powder is nearly ball
Shape.
3. titanium-based mixed-powder as described in claim 1, which is characterized in that the partial size of the titanium-based mixed-powder is 75-150
μm。
4. a kind of for manufacturing the manufacturing method of titanium-based mixed-powder as described in any one of claims 1-3, which is characterized in that
Including ball-milling technology.
5. manufacturing method as claimed in claim 4, which is characterized in that the parameter of the ball-milling technology are as follows: ratio of grinding media to material 2-4:
1；Revolving speed is 200-400 revs/min；Ball-milling Time is 120-180 minutes.
6. a kind of application method of titanium-based mixed-powder as described in any one of claims 1-3 in laser cladding coating,
It is characterized in that, the coating includes the titanium-based mixed-powder.
7. application method as claimed in claim 6, which is characterized in that include the following steps；
Titanium alloy sheet is chosen as substrate；
It polishes the substrate；
Clean the substrate；
The titanium-based mixed-powder is coated in the substrate surface by laser melting coating system.
8. application method as claimed in claim 6, which is characterized in that the coating includes TiB and Ti3The Second Phase Particle of Al.
9. method the use as claimed in claim 7, which is characterized in that the parameter setting of the laser melting coating system are as follows: scanning
Speed is 4mm/s, laser power 2kW；Powder feeding rate is 12g/min.
10. method the use as claimed in claim 7, which is characterized in that the laser melting coating system works under protection of argon gas.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112775440A (en) * | 2020-12-24 | 2021-05-11 | 上海交通大学 | Selective laser melting aluminum alloy and additive manufacturing method |
| CN113355547A (en) * | 2021-05-28 | 2021-09-07 | 西安交通大学 | TiB/Ti-Al titanium-based composite material based on Ti-AlB2 system and preparation method thereof |
-
2019
- 2019-08-22 CN CN201910780147.XA patent/CN110408924A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112775440A (en) * | 2020-12-24 | 2021-05-11 | 上海交通大学 | Selective laser melting aluminum alloy and additive manufacturing method |
| CN113355547A (en) * | 2021-05-28 | 2021-09-07 | 西安交通大学 | TiB/Ti-Al titanium-based composite material based on Ti-AlB2 system and preparation method thereof |
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Application publication date: 20191105 |