CN109750290A - A kind of TiAl-based wear-resistant laser cladding coating powder and preparation method - Google Patents
A kind of TiAl-based wear-resistant laser cladding coating powder and preparation method Download PDFInfo
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- 239000011248 coating agent Substances 0.000 title claims abstract description 76
- 238000000576 coating method Methods 0.000 title claims abstract description 76
- 239000000843 powder Substances 0.000 title claims abstract description 68
- 238000004372 laser cladding Methods 0.000 title claims abstract description 46
- 229910010038 TiAl Inorganic materials 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 13
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims description 47
- 238000005498 polishing Methods 0.000 claims description 19
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 17
- 230000008018 melting Effects 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 238000000498 ball milling Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 244000137852 Petrea volubilis Species 0.000 claims description 13
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 11
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(IV) oxide Inorganic materials O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 claims description 11
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 239000011812 mixed powder Substances 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000001476 alcoholic effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 7
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 229910021193 La 2 O 3 Inorganic materials 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 15
- 238000005253 cladding Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 7
- 208000037656 Respiratory Sounds Diseases 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000005282 brightening Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 238000010301 surface-oxidation reaction Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
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- 238000010884 ion-beam technique Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- Other Surface Treatments For Metallic Materials (AREA)
Abstract
本发明涉及一种TiAl基耐磨激光熔覆涂层粉末及制备方法，属于激光熔覆金属材料表面改性技术领域。该TiAl基耐磨激光熔覆涂层粉末，由以下质量百分数组分组成：TiAl中间合金粉60.5%~86.5%，Si粉10%~20%，HfO2粉1%~10%，La2O3粉1%~5%，B粉1%~3%，CeO2粉0.5%~1.5%。本发明钛合金基体上制备出高硬度高耐磨性，且基体与涂层呈冶金结合的涂层。The invention relates to a TiAl-based wear-resistant laser cladding coating powder and a preparation method, and belongs to the technical field of surface modification of laser cladding metal materials. The TiAl-based wear-resistant laser cladding coating powder is composed of the following components by mass percentage: TiAl master alloy powder 60.5%-86.5%, Si powder 10%-20%, HfO 2 powder 1%-10%, La 2 O 3 powder 1%~5%, B powder 1%~3%, CeO 2 powder 0.5%~1.5%. A coating with high hardness and high wear resistance is prepared on the titanium alloy substrate of the invention, and the substrate and the coating are metallurgically combined.
Description
Technical field
The present invention relates to a kind of wear-resisting laser cladding coating powder of TiAl base and preparation methods, belong to laser melting coating metal material
Expect process for modifying surface field.
Background technique
The every field such as empty space flight, petrochemical industry, automobile ship and military chemical industry.But titanium alloy is outstanding at high temperature
It is under 400 DEG C or more of operating condition, and wearability and inoxidizability will be greatly reduced, and causes to fail, to limit
It is further applied.For example, airplane component long service in the environment of high temperature and pressure, usually due to wearing or aoxidizing
The failure of reason moulding components.
In order to improve the hardness and wearability on titanium or titanium alloy surface, is either expanded with heat infiltration, is electroplated, vacuum crosses film etc. and is
The conventional surface metal-surface strengthening processing method of representative, or answered with plasma infiltration, ion beam, electron beam, laser beam
Element alloyed, laser cladding is seeped with the modern process for treating surface for mark, such as plasma nitrided, surface, all once in titanium
And titanium alloy surface carried out research and application.Compared with traditional surface modification technology, laser surface modification has significant
Feature.Maximum advantage is its coating and matrix in metallurgical bonding, and bond strength is high.And it can be cheap, easy processing
Substrate material surface selectively prepares high-performance cladding layer, and the thickness of cladding layer is unrestricted, reduces costs, and improves
The utility value of material.
Ceramic phase is due to having the advantages that high-melting-point, high rigidity, thermal stability are good, through being used to prepare frequently as reinforced phase
Laser melting coating metal-base composites.But it is directly added into the second phase in the powder, usually have that bond strength is low, and wetability is poor
The problems such as, and react to obtain the second phase by Laser Cladding in-situ, problems can be greatly reduced, reaction interface is pollution-free,
Second phase and matrix wetability are good.
But currently, industrialization is also not implemented in laser melting coating, wherein the unstable quality of laser cladding coating is wherein one
Big reason.The crackle of coating is more, and stomata is mostly that there are two main problems for coating.Therefore, finding one kind, to can be improved matrix strong
The method of degree, hardness and wearability is vital.
Summary of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provides a kind of wear-resisting laser cladding coating of TiAl base
Powder and preparation method.Hard high-wearing feature is prepared on titanium alloy substrate of the present invention, and matrix and coating are in metallurgical bonding
Coating.The invention is realized by the following technical scheme.
A kind of wear-resisting laser cladding coating powder of TiAl base, is grouped as: TiAl intermediate alloy by following mass percent group
Powder 60.5% ~ 86.5%, Si powder 10% ~ 20%, HfO2Powder 1% ~ 10%, La2O3Powder 1% ~ 5%, B powder 1% ~ 3%, CeO2Powder 0.5% ~ 1.5%.
The TiAl master alloyed powder, Si powder, HfO2Powder, La2O3Powder, B powder and CeO2Powder purity is 99.5% or more, average
Granularity is 100 ~ 200 mesh.Said components are commercial products.
A kind of preparation method of the wear-resisting laser cladding coating powder of TiAl base, step include:
Step 1 is cleaned until matrix surface is bright and clean with alcohol acetone soln with sand paper polishing metallic matrix, spare after dry；
Step 2, by each component be uniformly mixed obtain mixed-powder；
Alcoholic solution is added in step 3, the mixed-powder for obtaining step 2, is modulated into paste, by pressed disc method be preset at through
On the metallic matrix of step 1 processing, coating thickness reaches 1 ~ 2mm, and the sample of preset completion is dried；
Step 4, the sample for obtaining step 3 carry out laser melting coating, and after natural cooling, metal base surface obtains laser melting coating
Layer.
Metallic matrix is titanium alloy in the step 1.
Polish in above-mentioned steps 1 it is bright and clean and clean specific steps: metal base surface 200# sand paper polish matrix table
Sample is rotated by 90 ° by surface oxidation film when being polishing to without coarse scratch, then is polished with 400 mesh sand paper, and polishing scratch direction one is made
It causes, surface-brightening can (excessively bright surface will increase laser reflectivity, damage instrument)；It is carried out again with alcohol acetone soln
Cleaning, removes the greasy dirt of metal base surface.
It is uniformly mixed in the step 2 and uses vacuum ball milling；Vacuum ball milling parameter: under vacuum condition, rotational speed of ball-mill 30 ~
60r/min, ratio of grinding media to material 12:1 ~ 20:1, Ball-milling Time are 2 ~ 4h.
Drying temperature is 50 ~ 90 DEG C in the step 3, and drying time is 5 ~ 8h.
In the step 4 in laser cladding process: laser melting coating is GS-TEL-6000 type crossing current multimode CO2Laser and
It is carried out on its mating Siemens CNC lathe, laser power is 3 ~ 4.5kW, and scanning speed is 350 ~ 500mm/min, and hot spot is straight
Diameter≤5mm, protective gas Ar, N2Or Ar-N2Mixed gas, gas flow be 15 ~ 25L/min.
The beneficial effects of the present invention are:
(1) TiAl master alloyed powder can reduce splashing and volatilization in experimentation, TiAl base laser melting coating prepared by the present invention
Coating has good macro morphology, and coat inside stomata and crackle are few.After tested, coating and matrix are in good metallurgical junction
It closes, coating hardness with higher and good wear-resisting property.
(2) B and Si has the function of deoxidation, slag making, degasification, and B at high temperature and can be preferentially produced borate films being covered on
Coating surface, with reacting outside film in barrier film, being mingled in reduction cladding layer.In addition, B can refine crystal grain, high temperature is improved
Intensity can generate TiB, TiB by reaction in-situ2Ceramic phase is distributed in cladding layer and has the function that dispersion-strengtherning；Si can
To reduce alloy melting point, Ti is generated5Si3Hard phase improves cladding performance.
(3) La2O3Addition coated powder can be improved to the absorptivity of laser beam energy, to improve its laser power
Density keeps coating higher with substrate combinating strength.
(4) HfO2Reaction in-situ occurs with B and generates HfB ceramic phase, fusing point is up to 3200 DEG C, and stable chemical performance can
To have the function that improve wearability.
(5) CeO2As rare earth oxide, the mobility of liquid metal can be improved, increase wetability, in addition, also making
The effect of particle picture more evenly disperse, and crystal grain is refined, so that the intensity and plasticity of cladding layer are improved, meanwhile, wearability
Also certain promotion has been obtained.
(6) present invention by laser melting and coating technique obtained hard high-wearing feature and with the compact coating of matrix,
There is important directive function to the preparation higher coating of quality.
Detailed description of the invention
Fig. 1 is the metallographic structure of 1 laser cladding coating of the embodiment of the present invention；
Fig. 2 is the metallographic structure of 2 laser cladding coating of the embodiment of the present invention；
Fig. 3 is the metallographic structure of 3 laser cladding coating of the embodiment of the present invention；
Fig. 4 is the SEM figure of 1 laser cladding coating of the embodiment of the present invention and matrix junction；
Fig. 5 is the SEM figure of 2 laser cladding coating of the embodiment of the present invention and matrix junction；
Fig. 6 is the SEM figure of 3 laser cladding coating of the embodiment of the present invention and matrix junction；
Fig. 7 is the microhardness figure of the laser cladding coating of embodiment 1, embodiment 2 and embodiment 3.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
The wear-resisting laser cladding coating powder of the TiAl base, is grouped as: TiAl master alloyed powder by following mass percent group
86.5%, Si powder 10%, HfO2Powder 1%, La2O3Powder 1%, B powder 1%, CeO2Powder 0.5%.
The TiAl master alloyed powder, Si powder, HfO2Powder, La2O3Powder, B powder and CeO2Powder purity is 99.5% or more, average
Granularity is 150 mesh.Said components are commercial products.
The preparation method of the wear-resisting laser cladding coating powder of the TiAl base, step include:
Step 1 is cleaned until matrix surface is bright and clean with alcohol acetone soln with sand paper polishing metallic matrix, spare after dry；Its
Middle metallic matrix is titanium alloy (TC4 titanium alloy), and chemical component is as shown in table 1；Polish specific steps that are clean and cleaning: metal
Sample is rotated by 90 ° when being polishing to without coarse scratch by matrix surface with 200# sand paper matrix surface oxidation film of polishing, then with 400
Mesh sand paper is polished, and keeps polishing scratch direction consistent, and surface-brightening can (excessively bright surface will increase laser reflectivity, damage
Hurt instrument)；It is cleaned again with alcohol acetone soln, removes the greasy dirt of metal base surface；
Table 1
Step 2, by each component be uniformly mixed obtain mixed-powder；It is uniformly mixed and uses vacuum ball milling, vacuum ball milling parameter: vacuum
Under the conditions of (be passed through inert gas and be evacuated to vacuum, circulation three times, vacuum degree 10Pa ~ 500Pa), rotational speed of ball-mill 30r/min, ratio of grinding media to material
12:1, Ball-milling Time 4h；
Step 3, the alcoholic solution that 3mL is added in the 10g mixed-powder for obtaining step 2, concentration is 99.7wt%, are modulated into paste,
It is preset on the metallic matrix handled through step 1 by pressed disc method, coating thickness reaches 1mm, by the examination of preset completion
(drying temperature is 50 DEG C, drying time 8h) is dried in sample；
Step 4, the sample for obtaining step 3 carry out laser melting coating, and in laser cladding process: laser melting coating is GS-TEL-6000
Type crossing current multimode CO2It is carried out on laser and its mating Siemens CNC lathe, laser power 3kW, scanning speed is
350mm/min, spot diameter 4mm, protective gas Ar, gas flow 15L/min, after natural cooling, Metal Substrate body surface
Face obtains laser cladding layer.
The present embodiment metal base surface is obtained into laser cladding layer using linear cutter into square block, cross section is pressed
Metallographic requires polishing sample, then uses HF-HNO3-H2O(volume ratio 2:3:15 analyzes pure solution) mixed solution corroded, then
It is observed with metallographic microscope and scanning electron microscope, metallograph is as shown in Figure 1, it is easy to see that coating does not have apparent stomata
And crackle, dense structure, nothing are mingled with phenomenon；Its scanning electron microscopic picture is as shown in figure 4, it can be seen from the figure that coating and matrix
It is in metallurgical bonding in conjunction with all right.Using the microhardness of microhardness testers test cladding layer, from coating to combined area, heat
The zone of influence is arrived matrix progress longitudinal direction again and is got ready, as a result as shown in fig. 7, by calculating, the average hardness of laser cladding coating exists
1201HV0.3, hardness is 3.53 times of metallic matrix.
Embodiment 2
The wear-resisting laser cladding coating powder of the TiAl base, is grouped as: TiAl master alloyed powder by following mass percent group
60.5%, Si powder 20%, HfO2Powder 10%, La2O3Powder 5%, B powder 3%, CeO2Powder 1.5%.
The TiAl master alloyed powder, Si powder, HfO2Powder, La2O3Powder, B powder and CeO2Powder purity is 99.5% or more, average
Granularity is 100 mesh.Said components are commercial products.
The preparation method of the wear-resisting laser cladding coating powder of the TiAl base, step include:
Step 1 is cleaned until matrix surface is bright and clean with alcohol acetone soln with sand paper polishing metallic matrix, spare after dry；Its
Middle metallic matrix is titanium alloy (TC4 titanium alloy), and chemical component is as shown in table 1；Polish specific steps that are clean and cleaning: metal
Sample is rotated by 90 ° when being polishing to without coarse scratch by matrix surface with 200# sand paper matrix surface oxidation film of polishing, then with 400
Mesh sand paper is polished, and keeps polishing scratch direction consistent, and surface-brightening can (excessively bright surface will increase laser reflectivity, damage
Hurt instrument)；It is cleaned again with alcohol acetone soln, removes the greasy dirt of metal base surface；
Step 2, by each component be uniformly mixed obtain mixed-powder；It is uniformly mixed and uses vacuum ball milling, vacuum ball milling parameter: vacuum
Under the conditions of (be passed through inert gas and be evacuated to vacuum, circulation three times, vacuum degree 10Pa ~ 500Pa), rotational speed of ball-mill 60r/min, ratio of grinding media to material
20:1, Ball-milling Time 2h；
Step 3, the alcoholic solution that 3.5mL is added in the 10g mixed-powder for obtaining step 2, concentration is 99.7wt%, are modulated into paste
Shape is preset on the metallic matrix handled through step 1 by pressed disc method, and coating thickness reaches 2mm, by preset completion
(drying temperature is 90 DEG C, drying time 5h) is dried in sample；
Step 4, the sample for obtaining step 3 carry out laser melting coating, and in laser cladding process: laser melting coating is GS-TEL-6000
Type crossing current multimode CO2It is carried out on laser and its mating Siemens CNC lathe, laser power 4.5kW, scanning speed is
500mm/min, spot diameter 4mm, protective gas N2, gas flow 25L/min, after natural cooling, Metal Substrate body surface
Face obtains laser cladding layer.
The present embodiment metal base surface is obtained into laser cladding layer using linear cutter into square block, cross section is pressed
Metallographic requires polishing sample, then uses HF-HNO3-H2O(volume ratio 2:3:15 analyzes pure solution) mixed solution corroded, then
It is observed with metallographic microscope and scanning electron microscope, metallograph is as shown in Figure 2, it is easy to see that coating does not have apparent stomata
And crackle, dense structure, nothing are mingled with phenomenon；Its scanning electron microscopic picture is as shown in figure 5, it can be seen from the figure that coating and matrix
It is in metallurgical bonding in conjunction with all right.Using the microhardness of microhardness testers test cladding layer, from coating to combined area, heat
The zone of influence is arrived matrix progress longitudinal direction again and is got ready, as a result as shown in fig. 7, by calculating, the average hardness of laser cladding coating exists
1223HV0.3, hardness is 3.60 times of metallic matrix.
Embodiment 3
The wear-resisting laser cladding coating powder of the TiAl base, is grouped as by following mass percent group: TiAl master alloyed powder 73%,
Si powder 15%, HfO2Powder 5%, La2O3Powder 4%, B powder 2%, CeO2Powder 1%.
The TiAl master alloyed powder, Si powder, HfO2Powder, La2O3Powder, B powder and CeO2Powder purity is 99.5% or more, average
Granularity is 200 mesh.Said components are commercial products.
The preparation method of the wear-resisting laser cladding coating powder of the TiAl base, step include:
Step 1 is cleaned until matrix surface is bright and clean with alcohol acetone soln with sand paper polishing metallic matrix, spare after dry；Its
Middle metallic matrix is titanium alloy (TC4 titanium alloy), and chemical component is as shown in table 1；Polish specific steps that are clean and cleaning: metal
Sample is rotated by 90 ° when being polishing to without coarse scratch by matrix surface with 200# sand paper matrix surface oxidation film of polishing, then with 400
Mesh sand paper is polished, and keeps polishing scratch direction consistent, and surface-brightening can (excessively bright surface will increase laser reflectivity, damage
Hurt instrument)；It is cleaned again with alcohol acetone soln, removes the greasy dirt of metal base surface；
Step 2, by each component be uniformly mixed obtain mixed-powder；It is uniformly mixed and uses vacuum ball milling, vacuum ball milling parameter: vacuum
Under the conditions of (be passed through inert gas and be evacuated to vacuum, circulation three times, vacuum degree 10Pa ~ 500Pa), rotational speed of ball-mill 40r/min, ratio of grinding media to material
18:1, Ball-milling Time 3h；
Step 3, the alcoholic solution that 4mL is added in the 10g mixed-powder for obtaining step 2, concentration is 99.7wt%, are modulated into paste,
It is preset on the metallic matrix handled through step 1 by pressed disc method, coating thickness reaches 1.5mm, by preset completion
(drying temperature is 70 DEG C, drying time 6h) is dried in sample；
Step 4, the sample for obtaining step 3 carry out laser melting coating, and in laser cladding process: laser melting coating is GS-TEL-6000
Type crossing current multimode CO2It is carried out on laser and its mating Siemens CNC lathe, laser power 4.0kW, scanning speed is
450mm/min, spot diameter 3mm, protective gas are the Ar-N that volume ratio is 1:12Mixed gas, gas flow 18L/min,
After natural cooling, metal base surface obtains laser cladding layer.
The present embodiment metal base surface is obtained into laser cladding layer using linear cutter into square block, cross section is pressed
Metallographic requires polishing sample, then uses HF-HNO3-H2O(volume ratio 2:3:15 analyzes pure solution) mixed solution corroded, then
It is observed with metallographic microscope and scanning electron microscope, metallograph is as shown in Figure 3, it is easy to see that coating does not have apparent stomata
And crackle, dense structure, nothing are mingled with phenomenon；Its scanning electron microscopic picture is as shown in fig. 6, it can be seen from the figure that coating and matrix
It is in metallurgical bonding in conjunction with all right.Using the microhardness of microhardness testers test cladding layer, from coating to combined area, heat
The zone of influence is arrived matrix progress longitudinal direction again and is got ready, as a result as shown in fig. 7, by calculating, the average hardness of laser cladding coating exists
1244HV0.3, hardness is 3.67 times of metallic matrix.
Fig. 7 is the microhardness of the cladding layer of embodiment 1, embodiment 2 and embodiment 3, and as can be seen from the figure its is micro-
For hardness in the trend gradually decreased from coating to matrix, coating hardness opposing metallic matrix has biggish promotion.
In conjunction with attached drawing, the embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (7)
1. a kind of wear-resisting laser cladding coating powder of TiAl base, it is characterised in that: be grouped as by following mass percent group: TiAl
Master alloyed powder 60.5% ~ 86.5%, Si powder 10% ~ 20%, HfO2Powder 1% ~ 10%, La2O3Powder 1% ~ 5%, B powder 1% ~ 3%, CeO2Powder
0.5%~1.5%。
2. the wear-resisting laser cladding coating powder of TiAl base according to claim 1, it is characterised in that: closed among the TiAl
Bronze, Si powder, HfO2Powder, La2O3Powder, B powder and CeO2Powder purity is 99.5% or more, and average particle size is 100 ~ 200 mesh.
3. a kind of preparation method of the wear-resisting laser cladding coating powder of TiAl base according to claim 1, it is characterised in that:
Step includes:
Step 1 is cleaned until matrix surface is bright and clean with alcohol acetone soln with sand paper polishing metallic matrix, spare after dry；
Step 2, by each component be uniformly mixed obtain mixed-powder；
Alcoholic solution is added in step 3, the mixed-powder for obtaining step 2, is modulated into paste, by pressed disc method be preset at through
On the metallic matrix of step 1 processing, coating thickness reaches 1 ~ 2mm, and the sample of preset completion is dried；
Step 4, the sample for obtaining step 3 carry out laser melting coating, and after natural cooling, metal base surface obtains laser melting coating
Layer.
4. the preparation method of the wear-resisting laser cladding coating powder of TiAl base according to claim 3, it is characterised in that: described
Metallic matrix is titanium alloy in step 1.
5. the preparation method of the wear-resisting laser cladding coating powder of TiAl base according to claim 3, it is characterised in that: described
It is uniformly mixed in step 2 and uses vacuum ball milling；Vacuum ball milling parameter: under vacuum condition, 30 ~ 60r/min of rotational speed of ball-mill, ratio of grinding media to material
12:1 ~ 20:1, Ball-milling Time are 2 ~ 4h.
6. the preparation method of the wear-resisting laser cladding coating powder of TiAl base according to claim 3, it is characterised in that: described
Drying temperature is 50 ~ 90 DEG C in step 3, and drying time is 5 ~ 8h.
7. the preparation method of the wear-resisting laser cladding coating powder of TiAl base according to claim 3, it is characterised in that: described
In step 4 in laser cladding process: laser power be 3 ~ 4.5kW, scanning speed be 350 ~ 500mm/min, spot diameter≤
5mm, protective gas Ar, N2Or Ar-N2Mixed gas, gas flow be 15 ~ 25L/min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235567A (en) * | 2020-03-10 | 2020-06-05 | 昆明理工大学 | A kind of rare earth doped material and preparation method thereof |
| CN113430516A (en) * | 2021-07-01 | 2021-09-24 | 重庆理工大学 | Ferritic martensitic steel with coating and method for producing the coating |
| CN114231973A (en) * | 2021-12-21 | 2022-03-25 | 东北大学 | A kind of silicide particle reinforced titanium-aluminum-based composite coating and its preparation method by laser cladding |
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| CN114231973B (en) * | 2021-12-21 | 2022-12-23 | 东北大学 | Silicide particle reinforced titanium-aluminum-based composite coating and laser cladding preparation method thereof |
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Application publication date: 20190514 |