CN107900368A - A kind of preparation method of MCrAlY alloy powder used for plasma spraying - Google Patents
A kind of preparation method of MCrAlY alloy powder used for plasma spraying Download PDFInfo
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- CN107900368A CN107900368A CN201711397133.7A CN201711397133A CN107900368A CN 107900368 A CN107900368 A CN 107900368A CN 201711397133 A CN201711397133 A CN 201711397133A CN 107900368 A CN107900368 A CN 107900368A
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- alloy powder
- mcraly
- mcraly alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- Chemical Kinetics & Catalysis (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
A kind of preparation method of MCrAlY alloy powder used for plasma spraying, comprises the following steps：1）It is dispensing according to the component of MCrAlY alloy, is smelted into MCrAlY alloy rod；2）Finishing processing is carried out to the MCrAlY alloy rod of melting, the electrode bar after processing is：A diameter of 20 100mm, length are 200 1000mm；3）Electrode bar is loaded into reative cell, reative cell is vacuumized, one or both of helium, argon gas or nitrogen are filled with to reative cell；4）The plasma gun power of PREP powder manufacturing apparatuses is 50 400kW, electrode stick end is heated, according to grain size intervals requirement of the product to powder, electrode bar rotating speed is 8000 35000r/min, make electrode stick end uniform melt, fine drop is formed, drop is quickly cooled to spheric granules in inert gas environment, falls into and collects in batch can；5）Obtained MCrAlY alloy powder is sieved and packed under inert gas shielding environment.The MCrAlY alloy powder prepared using this method has the characteristics that good fluidity, high sphericity, low oxygen content.
Description
Technical field
The invention belongs to supertherm powder preparing technical field, and in particular to a kind of MCrAlY used for plasma spraying
The preparation method of alloy powder.
Background technology
MCrAlY is presently the most common thermal spraying high-temperature alloy material, and M represents matrix element, is Fe, Ni, Co tri-
The one or two of kind metallic element.Following a few classes are mainly had according to the difference of its matrix element：FeCrAlY, suitably in carburetting
Work under environment, show excellent sulfuration resistant performance, price is relatively low, and plasticity is good, but it is organized as ferrite, with general high temperature
The matrix of alloy workpiece mismatches, therefore cannot generally be used Ni-based with cobalt-base alloys workpiece surface；NiCrAlY, prolongs
Property and inoxidizability it is preferable, but sulfuration resistant poor-performing, using preferable in aero-engine；CoCrAlY, has higher resist
Curing capacity, but inoxidizability and ductility are relatively low, suitably work under naval vessels, ground industry gas turbine environment；NiCoCrAlY
And CoNiCrAlY, the advantages of this kind of alloy has NiCrAlY and CoCrAlY concurrently, comprehensive performance is preferable.MCrAlY coatings resist
Oxidation and corrosion resistance, are based on the Cr that densification can be formed in coating surface2O3 Or Al2O3Oxide-film.These oxide-films are made
For the diffusion-barrier coating of oxygen, the further oxidation or corrosion of matrix or binder course are prevented.MCrAlY is often and Y2O3 - ZrO2Match somebody with somebody
Conjunction forms functionally gradient coating, which is resistant to 1700 high temperature, is applied to the types such as F100, JT8D, JT9D, V2500 at present
Number engine.
MCrAlY alloy degree is high, easily occurs macro-components segregation in fusion process, easily goes out in process of setting
The casting flaw such as existing shrinkage cavity, loose, temperature-room type plasticity is low and dispersion is big.The powder that hot-spraying technique uses requires well
Mobility and degree of purity；Good mobility ensure that the uniform of the powder feeding process of powder, and the raising of degree of purity can make
Powder surface keeps high activity, so as to be conducive to form finer and close binder course between powder and matrix.MCrAlY is prepared at present
It is gas atomization that alloy powder, which prepares main method,（Gas Atomization, GA）, using the MCrAlY alloy powder of GA preparations
The defects of last sphericity is poor, satellite powder, adhesive powder powder is more, causes the mobility of alloy poor, and alloy gas element
Content is high, the space that the quality of powder has a distinct increment.Compared to gas atomization, plasma rotating electrode flouring technology
（Plasma Rotating Electrode Process, PREP）It is particularly suited for the preparation of MCrAlY alloy powder.PREP
Belong to centrifugal atomizing powder-making technique, powder under the driving of surface energy in perfect spherical, the defects of bonded powder will not be formed so that
It ensure that alloy has high mobility.Meanwhile PREP pulverizing processes employ the degree of purity that high-vacuum apparatus ensure that powder,
Using PREP technologies can prepare ultra-fine, high-purity, high sphericity, low oxygen content MCrAlY alloy powder, it is ensured that spraying
The stabilization of process, ensure that the quality Nian Jie with matrix, have excellent performance, can meet the need in plasma spraying field
Ask.
The content of the invention
It is spherical for MCrAlY powder it is an object of the invention to provide one kind to overcome above-mentioned the deficiencies in the prior art
The problem of degree, mobility, poor degree of purity, and it is alloy powder sphericity made from currently widely used milling method, pure
Cleanliness is bad, influences the problem of spraying process is with matrix poor attachment and then influence coating military service performance, the present invention provides one
Kind high-purity, high sphericity, the preparation method of low oxygen content MCrAlY alloy powder, it is ensured that the MCrAlY alloy component after shaping
Uniformly, fine microstructures, excellent performance, meet the needs of plasma spraying field.
To achieve the above object, the technical solution adopted by the present invention is：A kind of MCrAlY alloy powder used for plasma spraying
The preparation method at end, comprises the following steps：
1）Component according to MCrAlY based alloys is dispensing, M=Ni, Cr, and one or both of Fe, is smelted into MCrAlY alloy
Rod；
2）Step 1）MCrAlY alloy rod carry out finishing processing obtain electrode bar, electrode bar is：A diameter of 20-100mm, length
For 200-1000mm, cylindricity ± 0.01~0.1；
3）Electrode bar is loaded into reative cell, reative cell is vacuumized, vacuum is less than 10-4Pa, to reative cell be filled with He, Ar,
N2One or both of mixed gas；
4）The plasma gun power of PREP powder manufacturing apparatuses is 50-400kW, electrode stick end is heated, according to product to powder
The grain size intervals requirement at end, electrode bar rotating speed is 8000-35000r/min, makes electrode stick end uniform melt, forms tiny liquid
Drop, drop are quickly cooled to spheric granules in inert gas environment, fall into and collect in batch can, obtain MCrAlY alloy powder.
The MCrAlY alloy powder mean particle sizes are 30 μm -500 μm.
The step 4）Pulverizing process oxygenation amount is less than 30ppm, is ultralow oxygenation amount.
The step 4）The Hall flow velocity of MCrAlY alloy powder is 8 ~ 15s/50g.
Step 5）The inert gas is He, Ar, N2In one kind or it is any two kinds mixing.
The beneficial effects of the present invention are：
Compared with prior art, the present invention uses PREP flouring technologies, and under the conditions of ultrahigh rotating speed, high-purity, height can be made
The performances such as the MCrAlY alloy powder of sphericity, low oxygen content, its size distribution, mobility have obtained larger lifting, can
Meet the application demand of technical field of hot.
The present invention can obtain the MCrAlY alloy powder that particle mean size is 30 μm -500 μm by adjusting technological parameter, especially
The superfines that particle mean size is less than 45 μm can be made, can realize the ultralow oxygenation amount less than 30ppm, while the Hall of powder
Flow velocity can reach 8 ~ 15s/50g.Above performance guarantee MCrAlY alloy powder can combine closely with matrix, improve painting
The military service performance of layer.
Embodiment
The present invention is described in further detail with reference to specific embodiment.
Embodiment 1
A kind of preparation method of MCrAlY alloy powder used for plasma spraying, comprises the following steps：
1）It is dispensing according to the component of MCrAlY based alloys, M=Ni, is smelted into NiCrAlY alloy bars；
2）Finishing processing is carried out to the NiCrAlY alloy bars of melting, the electrode bar after processing is：A diameter of 60mm, length are
600mm, cylindricity ± 0.015；
3）Electrode bar is loaded into reative cell, 5 × 10 are evacuated to reative cell-5Pa, He, N are filled with to reative cell2Gaseous mixture
Body；
4）The plasma gun power 185kW of PREP powder manufacturing apparatuses, heats electrode stick end, the grain according to product to powder
Spend section to require, electrode bar rotating speed is 21000r/min, makes electrode stick end uniform melt, forms fine drop, drop is lazy
Property gaseous environment in be quickly cooled to spheric granules, fall into collect batch can in, obtain MCrAlY alloy powder；
The MCrAlY alloy powder mean particle sizes are 106 μm.
The step 4）Pulverizing process oxygenation amount 20ppm.
The step 4）The Hall flow velocity of MCrAlY alloy powder is speed 11.8s/50g.
Step 5）The inert gas is He, N2Mixed gas
Embodiment 2
A kind of preparation method of MCrAlY alloy powder used for plasma spraying, comprises the following steps：
1）It is dispensing according to the component of MCrAlY based alloys, M=Fe, is smelted into FeCrAlY alloy bars；
2）Finishing processing is carried out to the FeCrAlY alloy bars of melting, the electrode bar after processing is：A diameter of 100mm, length are
1000mm, cylindricity ± 0.010；
3）Electrode bar is loaded into reative cell, 3 × 10 are evacuated to reative cell-5Pa, He, Ar gaseous mixture are filled with to reative cell
Body；
4）The plasma gun power 400kW of PREP powder manufacturing apparatuses, heats electrode stick end, the grain according to product to powder
Spend section to require, electrode bar rotating speed is 35000r/min, makes electrode stick end uniform melt, forms fine drop, drop is lazy
Property gaseous environment in be quickly cooled to spheric granules, fall into collect batch can in；
5）Obtained NiCrAlY alloy powders are sieved and packed under inert gas shielding environment.
The MCrAlY alloy powder mean particle sizes are 40 μm.
The step 4）Pulverizing process oxygenation amount 25ppm.
The step 4）The Hall flow velocity of MCrAlY alloy powder is 12.6s/50g.
Step 5）The inert gas is He, Ar mixed gas；
Embodiment 3
A kind of preparation method of MCrAlY alloy powder used for plasma spraying, comprises the following steps：
1）It is dispensing according to the component of MCrAlY based alloys, M=Co, Ni, are smelted into CoNiCrAlY alloy bars；
2）Finishing processing is carried out to the CoNiCrAlY alloy bars of melting, the electrode bar after processing is：A diameter of 20mm, length are
200mm, cylindricity ± 0.020；
3）Electrode bar is loaded into reative cell, 5.5 × 10 are evacuated to reative cell-5Pa, Ar gas is filled with to reative cell；
4）The plasma gun power 50kW of PREP powder manufacturing apparatuses, heats electrode stick end, the grain according to product to powder
Spend section to require, electrode bar rotating speed is 8000r/min, makes electrode stick end uniform melt, forms fine drop, drop is in inertia
Spheric granules is quickly cooled in gaseous environment, falls into and collects in batch can；
The MCrAlY alloy powder mean particle sizes are 240 μm, and rotating speed directly affects granularity, and rotating speed is higher, but is not linear
Relation, granularity is smaller, on the contrary.
The step 4）Pulverizing process oxygenation amount is 22ppm.
The step 4）The Hall flow velocity 12.0s/50g of MCrAlY alloy powder.
Step 5）The inert gas is Ar gas.
Claims (8)
1. a kind of preparation method of MCrAlY alloy powder used for plasma spraying, it is characterised in that comprise the following steps：
1）Component according to MCrAlY based alloys is dispensing, M=Ni, Cr, and one or both of Fe, is smelted into MCrAlY alloy
Rod；
2）Step 1）MCrAlY alloy rod carry out finishing processing obtain electrode bar, electrode bar is：A diameter of 20-100mm, length
For 200-1000mm, cylindricity ± 0.01 ~ 0.1；
3）Electrode bar is loaded into reative cell, reative cell is vacuumized, vacuum is less than 10-4Pa, to reative cell be filled with He, Ar,
N2One or both of gaseous mixture；
4）The plasma gun power of PREP powder manufacturing apparatuses is 50-400kW, electrode stick end is heated, according to product to powder
The grain size intervals requirement at end, electrode bar rotating speed is 8000-35000r/min, makes electrode stick end uniform melt, forms tiny liquid
Drop, drop are quickly cooled to spheric granules in inert gas environment, fall into and collect in batch can, obtain MCrAlY alloy powder.
2. a kind of preparation method of MCrAlY alloy powder used for plasma spraying according to claim 1, its feature exist
In the MCrAlY alloy powder mean particle sizes are 30 μm -500 μm.
3. a kind of preparation method of MCrAlY alloy powder used for plasma spraying according to claim 1, its feature exist
In the step 4）Pulverizing process oxygenation amount is less than 30ppm, is ultralow oxygenation amount.
4. a kind of preparation method of MCrAlY alloy powder used for plasma spraying according to claim 1, its feature exist
In the step 4）The Hall flow velocity of MCrAlY alloy powder is 8 ~ 15s/50g.
5. a kind of preparation method of MCrAlY alloy powder used for plasma spraying according to claim 1, its feature exist
In step 5）The inert gas is He, Ar, N2In one kind or it is any two kinds mixing.
6. a kind of preparation method of MCrAlY alloy powder used for plasma spraying according to claim 1, its feature exist
In comprising the following steps：
1）It is dispensing according to the component of MCrAlY based alloys, M=Ni, is smelted into NiCrAlY alloy bars；
2）Finishing processing is carried out to the NiCrAlY alloy bars of melting, the electrode bar after processing is：A diameter of 60mm, length are
600mm, cylindricity ± 0.015；
3）Electrode bar is loaded into reative cell, 5 × 10 are evacuated to reative cell-5Pa, He, N are filled with to reative cell2Gaseous mixture
Body；
4）The plasma gun power 185kW of PREP powder manufacturing apparatuses, heats electrode stick end, the grain according to product to powder
Spend section to require, electrode bar rotating speed is 21000r/min, makes electrode stick end uniform melt, forms fine drop, drop is lazy
Property gaseous environment in be quickly cooled to spheric granules, fall into collect batch can in, obtain MCrAlY alloy powder；
The MCrAlY alloy powder mean particle sizes are 106 μm；
The step 4）Pulverizing process oxygenation amount 20ppm；
The step 4）The Hall flow velocity of MCrAlY alloy powder is speed 11.8s/50g；
Step 5）The inert gas is He, N2Mixed gas.
7. a kind of preparation method of MCrAlY alloy powder used for plasma spraying according to claim 1, its feature exist
In comprising the following steps：
1）It is dispensing according to the component of MCrAlY based alloys, M=Fe, is smelted into FeCrAlY alloy bars；
2）Finishing processing is carried out to the FeCrAlY alloy bars of melting, the electrode bar after processing is：A diameter of 100mm, length are
1000mm, cylindricity ± 0.010；
3）Electrode bar is loaded into reative cell, 3 × 10 are evacuated to reative cell-5Pa, He, Ar gaseous mixture are filled with to reative cell
Body；
4）The plasma gun power 400kW of PREP powder manufacturing apparatuses, heats electrode stick end, the grain according to product to powder
Spend section to require, electrode bar rotating speed is 35000r/min, makes electrode stick end uniform melt, forms fine drop, drop is lazy
Property gaseous environment in be quickly cooled to spheric granules, fall into collect batch can in；
5）Obtained NiCrAlY alloy powders are sieved and packed under inert gas shielding environment；
The MCrAlY alloy powder mean particle sizes are 40 μm；
The step 4）Pulverizing process oxygenation amount 25ppm；
The step 4）The Hall flow velocity of MCrAlY alloy powder is 12.6s/50g；
Step 5）The inert gas is He, Ar mixed gas.
8. a kind of preparation method of MCrAlY alloy powder used for plasma spraying according to claim 1, its feature exist
In comprising the following steps：
1）It is dispensing according to the component of MCrAlY based alloys, M=Co, Ni, are smelted into CoNiCrAlY alloy bars；
2）Finishing processing is carried out to the CoNiCrAlY alloy bars of melting, the electrode bar after processing is：A diameter of 20mm, length are
200mm, cylindricity ± 0.020；
3）Electrode bar is loaded into reative cell, 5.5 × 10 are evacuated to reative cell-5Pa, Ar gas is filled with to reative cell；
4）The plasma gun power 50kW of PREP powder manufacturing apparatuses, heats electrode stick end, the grain according to product to powder
Spend section to require, electrode bar rotating speed is 8000r/min, makes electrode stick end uniform melt, forms fine drop, drop is in inertia
Spheric granules is quickly cooled in gaseous environment, falls into and collects in batch can；
The MCrAlY alloy powder mean particle sizes are 240 μm；
The step 4）Pulverizing process oxygenation amount is 22ppm；
The step 4）The Hall flow velocity 12.0s/50g of MCrAlY alloy powder；
Step 5）The inert gas is Ar gas.
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| CN102925841A (en) * | 2012-11-07 | 2013-02-13 | 天津大学 | Ceramic thermal barrier coating with allitic diffusion layer bonding layer and preparation method thereof |
| CN105624474A (en) * | 2016-04-11 | 2016-06-01 | 西安欧中材料科技有限公司 | Preparation method of superfine high-grade spherical EP741NP alloy powder |
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| CN106853536A (en) * | 2016-12-19 | 2017-06-16 | 西安欧中材料科技有限公司 | The method for preparing 3D printing CoCrWMo alloy spherical powder |
| CN107326218A (en) * | 2017-06-29 | 2017-11-07 | 西安欧中材料科技有限公司 | A kind of preparation method of 3D printing DD5 Ni-base Superalloy Powders |
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2017
- 2017-12-21 CN CN201711397133.7A patent/CN107900368A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110048017A1 (en) * | 2009-08-27 | 2011-03-03 | General Electric Company | Method of depositing protective coatings on turbine combustion components |
| CN101927350A (en) * | 2010-01-15 | 2010-12-29 | 张建利 | Method for preparing cobalt-base alloy CoCrMo prills by adopting plasma auxiliary rotation electrodes |
| CN102925841A (en) * | 2012-11-07 | 2013-02-13 | 天津大学 | Ceramic thermal barrier coating with allitic diffusion layer bonding layer and preparation method thereof |
| CN105624474A (en) * | 2016-04-11 | 2016-06-01 | 西安欧中材料科技有限公司 | Preparation method of superfine high-grade spherical EP741NP alloy powder |
| CN106735280A (en) * | 2016-11-23 | 2017-05-31 | 西北有色金属研究院 | A kind of preparation method of spherical TiTa alloy powders |
| CN106853536A (en) * | 2016-12-19 | 2017-06-16 | 西安欧中材料科技有限公司 | The method for preparing 3D printing CoCrWMo alloy spherical powder |
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