CN108130529A - A kind of particle enhanced nickel base metal powder for ultrahigh speed laser melting coating - Google Patents
A kind of particle enhanced nickel base metal powder for ultrahigh speed laser melting coating Download PDFInfo
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- CN108130529A CN108130529A CN201711405737.1A CN201711405737A CN108130529A CN 108130529 A CN108130529 A CN 108130529A CN 201711405737 A CN201711405737 A CN 201711405737A CN 108130529 A CN108130529 A CN 108130529A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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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
- B22F9/082—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 atomising using a fluid
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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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
- C22C32/0005—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 at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
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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
- C22C32/001—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 only oxides
- C22C32/0015—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 only oxides with only single oxides as main non-metallic constituents
- C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof
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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
- C22C32/0052—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 carbides
Abstract
The present invention relates to a kind of nickel based metal powder for superelevation rate laser melting coating, belong to metal material manufacturing field, are made of Ni substrate metal powder with oxide or carbide particle, mainly match and are：50 98% Ni substrate metal powder, 2 50% Al2O3、ZrO2, one of WC, TiC or two kinds or more of combined hybrid powder；Wherein the chemical composition of Ni substrate and its mass percent are：C≤0.1%, 2.0-30.0%Cr, 2.0-30.0%Mo, 0.1-5.0%Nb, Fe≤6.0%, Al≤0.6%, Ti≤0.6%, Mn≤0.8%, Si≤0.8%, Co≤2.0%, P≤0.030%, S≤0.030%, surplus be Ni and inevitable impurity, the wherein preferred 5.0%-40.0% of Cr contents+Mo contents.Using above-mentioned grain reinforced metal powder, using laser melting and coating technique, different process of arranging in pairs or groups is strengthened matrix surface and is repaired.
Description
Technical field
The invention belongs to metal material fields, and in particular to a kind of particle enhanced nickel base gold for ultrahigh speed laser melting coating
Belong to powder.
Background technology
According to current publication, the technology that conventional laser cladding powder can not meet ultrahigh speed laser melting coating will
It asks.The powder is after cladding head conveying convergence, and amyloid plaque is relatively large in diameter, the technique that can not meet the small amyloid plaque of superelevation rate laser melting coating
It is required that.
In consideration of it, it is necessary to provide a kind of Co-based alloy powder, to realize ultrahigh speed laser melting coating, and then provide it is anti-corrosion,
The good coat material that high-temperature oxidation resistant environmental surfaces are modified.
Invention content
The nickel-base alloy of the present invention is that have the comprehensive performances such as higher intensity and certain antioxidant anticorrosive ability under high temperature
A kind of alloy.It all has the various corrosive mediums of oxidation and reducing environment with outstanding inorganic acid resistance corrosive power
Very outstanding resistance to corrosion is the good coat material being modified for anti-corrosion, high-temperature oxidation resistant environmental surfaces.
According to an aspect of the present invention, a kind of superelevation rate laser melting and coating technique is provided, is a kind of Surface-micromachining process,
By synchronous powder feeding system adding material mode, the substrate material surface for added material being made to be moved with high-speed using the line of high-energy-density is same
When melt, and quickly solidify after formed dilution rate it is extremely low, with matrix be in metallurgical binding cladding layer, cladding rate is greatly improved,
Significantly improve the process of the operational characteristiies such as wear-resisting, anti-corrosion, heat-resisting, anti-oxidant of substrate material surface.
Compared with conventional low rate high speed cladding, superelevation rate laser melting coating high energy beam small part energy acts on matrix
Shallower molten bath is formed on material, and most of energy has been acted on dusty material, makes powder temperature before molten bath is entered
It rises to fusing point and melts, combined in droplets with basis material, so that the processing of ultrahigh speed laser melting coating is more molten than tradition
It covers efficiency and improves 40 times to hundreds of times.
New requirement also is proposed to the special powder of superelevation rate laser melting coating as a result,.The performance of metal powder is characterized,
Mainly use following index：1. particle size range, the size of metal powder granulates are usually characterized with the diameter of particle；2. flowing
Property, refer to flow through the standard funnel required time of predetermined hole diameter with a certain amount of powder to represent, the unit of generally use is
S/50g, the smaller mobility for illustrating the powder of numerical value is better；3. sphericity, the shape of the particle degree similar to sphere；
4.D50 describes the index of powder mean particle sizes, and the cumulative particle sizes percentile for referring to a sample reaches corresponding when 50%
Grain size.
Due to conventional particles enhancing nickel-based metallic material can not effectively pool smaller spot etc., the particle size powders
After cladding head conveying convergence, amyloid plaque is relatively large in diameter, and can not meet the technological requirement of the small amyloid plaque of superelevation rate laser melting coating.It needs
It is noted that the ultrahigh speed in the present invention is for existing laser melting coating speed, which specifically refers to
Laser scanning linear velocity is more than or equal to 25m/min.
According to an aspect of the present invention, a kind of particle enhanced nickel base metal powder for ultrahigh speed laser melting coating is provided,
It is characterized in that being made of Ni substrate metal powder with oxide or carbide particle, proportioning is：The Ni substrate gold of 50-98%
Belong to powder, the oxide or carbide particle of 2-50%, the oxide or carbide particle are selected from Al2O3、ZrO2, in WC, TiC
It is one or more；Wherein the chemical composition of Ni substrate metal powder and its mass percent are：C≤0.1%, 2.0-30.0%Cr,
2.0-30.0%Mo, 0.1-5.0%Nb, Fe≤6.0%, Al≤0.6%, Ti≤0.6%, Mn≤0.8%, Si≤0.8%, Co≤
2.0%, P≤0.030%, S≤0.030%, surplus are Ni and inevitable impurity；Wherein, the D50 of powder is 25-50 μm, stream
Dynamic property is 32-47 s/100g.
According to a further aspect of the invention, Cr contents+Mo contents 5.0%-40.0%.
According to a further aspect of the invention, size distribution in：10-100μm.
According to a further aspect of the invention, Han Yang Liang≤150ppm.
According to a further aspect of the invention, the preparation method of above-mentioned metal powder is provided, which is characterized in that this method is：
Composition of raw material alloying matches, and then carries out vacuum melting nickel ingot, melts nickel ingot, working chamber's vacuum using Frequency Induction Heating
Degree 10-1-10-2Pa, using aerosolization method powder, dust gases argon pressure 1.2-3.7MPa, receives to carry out granularity after powder
The metal powder of 10-100 μm of particle size range is screened in screening；Then choose the oxide or carbonization that particle size range is 10-100 μm
Object is matched the metal powder that the particle size range prepared is 10-100 μm as corresponding in batch mixing to oxide or carbide
It is uniformly mixed in machine, you can ultrahigh speed laser melting coating particle enhanced nickel base metal powder is made.
According to a further aspect of the invention, it provides for the Co-based alloy powder of superelevation rate laser melting coating, each element
Mass fraction be：C≤0.1%, 2.0-30.0%Cr, 2.0-30.0%Mo, 0.1-5.0%Nb, Fe≤6.0%, Al≤0.6%,
Ti≤0.6%, Mn≤0.8%, Si≤0.8%, Co≤2.0%, P≤0.030%, S≤0.030%, surplus is for Ni and inevitably
Impurity；
The wherein preferred 5.0%-40.0% of Cr contents+Mo contents.
The metal powder grain size is：10-100μm；
D50：25-50μm；
Mobility：32-47 s/100g.
According to a further aspect of the invention, the method for preparing above-mentioned superelevation rate laser melting coating Co-based alloy powder is：It is former
Material composition alloying matches, and then carries out vacuum melting nickel ingot, melts nickel ingot, working chamber's vacuum degree using Frequency Induction Heating
10-1-10-2Pa, using aerosolization method powder, dust gases argon pressure 1.2-3.7MPa, receives to carry out granularity sieve after powder
Point.
Wherein, the control of vacuum degree has significant impact for indexs such as powder oxygen content, and the pressure control for the gases argon that dusts is
The core parameter of powder size, sphericity and powder formation rate is controlled, needs to be made according to liquid stream situation and each period of dusting comprehensively
Accurate adjustment.
Using the powder after screening, using superelevation rate laser melting and coating technique, different process of arranging in pairs or groups, carry out surface manufacture and
It repairs.
The treatment of surfaces of components is treated to be machined out.
With acetone wiping parts to be processed surface, surface grease is removed.
Laser melting coating path planning is carried out according to piece surface geometry, formulates technological parameter.
The treatment of surfaces of components is treated using superelevation rate laser melting coating system and carries out cladding processing, is joined using following technique
Number：1 ~ 2kw of laser power, spot diameter 1mm, 5 ~ 8kg/h of powder feeding rate, laser scan rate 20m ~ 500m/min, overlapping rate
30% ~ 40%, 25 ~ 500 μm of individual layer cladding thickness, laser melting coating head has argon gas defencive function, 15 ~ 30L/min of argon flow amount.
Using fine turning lathe, piece surface after superelevation rate laser melting coating is machined out grinding machine and polishing, until
Piece surface reaches service precision requirement, obtains surface fused coating of good performance.
Compared with prior art, the advantage of the invention is that：
1. the metal powder is arranged in pairs or groups with preferred alloy content, cladding layer can be combined to fine and close consolidation with matrix, cladding layer tool
There is excellent anti-corrosion, wear-resisting and pyro-oxidation resistance, economic performance is good.
2. laser melting coating surface processing speed can be greatly improved in ultrahigh speed laser melting and coating technique, obtain surfacing it is smooth,
The cladding layer of pore-free, flawless, the technology have the indexs such as metal powder granularity, mobility a particular/special requirement, involved by the present invention
And superelevation rate laser melting coating with Co-based alloy powder be suitable for the processing technology.
Specific embodiment
The present invention provides a kind of particle enhanced nickel base metal powder for ultrahigh speed laser melting coating, by Ni substrate gold
Belong to powder to form with oxide or carbide particle, proportioning is：The Ni substrate metal powder of 50-98%, the oxide of 2-50%
Or carbide particle, the oxide or carbide particle are selected from Al2O3、ZrO2, one or more of WC, TiC；It is wherein Ni-based
The chemical composition and its mass percent of body metal powder be：C≤0.1%, 2.0-30.0%Cr, 2.0-30.0%Mo, 0.1-
5.0%Nb, Fe≤6.0%, Al≤0.6%, Ti≤0.6%, Mn≤0.8%, Si≤0.8%, Co≤2.0%, P≤0.030%, S≤
0.030%, surplus is Ni and inevitable impurity；Wherein, the D50 of powder is 25-50 μm, and mobility is 32-47 s/100g.
Advantageously, Cr contents+Mo contents 5.0%-40.0%.
Advantageously, size distribution in：10-100μm.
Advantageously, Han Yang Liang≤150ppm.
Advantageously, sphericity >=90%.
Preferably, powder size section is 15 ~ 45 μm.Han Yang Liang≤150ppm.Hollow powder rate ＜ 1%.
Advantageously, the preparation method of above-mentioned metal powder is provided, which is characterized in that this method is：Composition of raw material closes
Aurification matches, and then carries out vacuum melting nickel ingot, melts nickel ingot, working chamber's vacuum degree 10 using Frequency Induction Heating-1-10- 2Pa, using aerosolization method powder, dust gases argon pressure 1.2-3.7MPa, receives to carry out sizing after powder, screen
The metal powder of 10-100 μm of particle size range；The oxide or carbide that particle size range is 10-100 μm are then chosen, will be made
The metal powder that the particle size range got ready is 10-100 μm is uniform in batch mixer by corresponding proportioning to oxide or carbide
Mixing, you can ultrahigh speed laser melting coating particle enhanced nickel base metal powder is made.
Further, with reference to embodiment, the invention will be further described, but is not limited to the following example.Embodiment
The mass fraction of each element is as shown in table 1 in middle target product, and performance parameter is as shown in table 2, and Application Example carries out ultrahigh speed
Rate laser melting coating processing rear surface performance is as shown in table 3.
Table 1 ultrahigh speed laser melting coating particle enhanced nickel base alloy powder ingredient（Mass fraction, %）
| Embodiment | C | Cr | Mo | Nb | Fe | Al | Ti | Mn | Si | S、P | Particle/content | Ni |
| Embodiment 1 | 0.05 | 21 | 9.1 | 3.6 | 2.5 | 0.4 | 0.2 | - | - | ≤0.03 | WC-15 | Surplus |
| Embodiment 2 | 0.03 | 19.1 | 3.0 | 5.1 | 7.5 | 0.5 | 0.9 | 0.2 | 0.2 | ≤0.03 | Al2O3-5, ZrO2-5 | Surplus |
| Embodiment 3 | 0.05 | 30 | 0.5 | 2.1 | 10 | 0.5 | 0.5 | 0.5 | 0.6 | ≤0.03 | WC-5, TiC-10 | Surplus |
Table 2 ultrahigh speed laser melting coating particle enhanced nickel base alloy powder performance parameter
| Embodiment | Granularity μm | Mobility s/50g | Sphericity % | D50/μm |
| Embodiment 1 | 10-100 | 17 | 90 | 40 |
| Embodiment 2 | 10-100 | 17 | 91 | 42 |
| Embodiment 3 | 10-100 | 16 | 91 | 43 |
3 superelevation rate laser melting coating of table processes rear surface performance
| Embodiment | The resisting salt fog corrosion time（h） | Corrosion resisting property improves percentage % | Service life extends percentage % |
| Embodiment 1 | 689 | 421 | 207 |
| Embodiment 2 | 702 | 455 | 236 |
| Embodiment 3 | 694 | 436 | 212 |
Embodiment 1
The mass fraction of its each element is：0.05%C, 21%Cr, 9.1%Mo, 3.6%Nb, 2.5%Fe, 0.4%Al, 0.2%Ti, P≤
0.030%, S≤0.030%, 15%WC particle, surplus are Ni and inevitable impurity.
The metal powder grain size is：10-100μm；Mobility：17s/50g；Sphericity >=90%；D50=40μm。
Preparation method is：Composition of raw material alloying matches, and vacuum melting nickel ingot is then carried out, using Frequency Induction Heating
Melt nickel ingot, working chamber's vacuum degree 10-1-10-2Pa, using aerosolization method powder, gases argon pressure of dusting 1.2-
3.7MPa receives to carry out sizing after powder.
The WC powder that particle size range is 10-100um is chosen, is uniformly mixed in batch mixer with the powder after screening, you can
The particle enhanced nickel base metal powder for ultrahigh speed laser melting coating is made.
Using above-mentioned particle enhanced nickel base metal powder, using superelevation rate laser melting and coating technique, different process of arranging in pairs or groups, into
Row surface manufactures and repairs.
The treatment of surfaces of components is treated to be machined out.
With acetone wiping parts to be processed surface, surface grease is removed.
Laser melting coating path planning is carried out according to piece surface geometry, formulates technological parameter.
The treatment of surfaces of components is treated using superelevation rate laser melting coating system and carries out cladding processing, is joined using following technique
Number：1 ~ 2kw of laser power, spot diameter 1mm, 5 ~ 8kg/h of powder feeding rate, laser scan rate 20m ~ 500m/min, overlapping rate
30% ~ 40%, 25 ~ 500 μm of individual layer cladding thickness, laser melting coating head has argon gas defencive function, 15 ~ 30L/min of argon flow amount.
The mass fraction of each element is as shown in embodiment 1 in table 1 in target product.The performance parameter of embodiment 1 such as 2 institute of table
Show.It is as shown in table 3 that Application Example 1 carries out superelevation rate laser melting coating processing rear surface performance.
Embodiment 2
The mass fraction of its each element is：0.03%C, 19.1%Cr, 3.0%Mo, 5.1%Nb, 7.5%Fe, 0.5%Al, 0.9%Ti,
0.2%Mn, 0.2%Si, P≤0.030%, S≤0.030%, 5%Al2O3 powder, 5%ZrO2 powder, surplus is for Ni and inevitably
Impurity.
The metal powder grain size is：10-100 μm, mobility：17s/50g, sphericity >=91%, D50=42μm。
Preparation method is：Composition of raw material alloying matches, and vacuum melting nickel ingot is then carried out, using Frequency Induction Heating
Melt nickel ingot, working chamber's vacuum degree 10-1-10-2Pa, using aerosolization method powder, gases argon pressure of dusting 1.2-
3.7MPa receives to carry out sizing after powder.
The Al2O3 powder and ZrO2 powder that particle size range is 10-100um are chosen, with the powder after screening in batch mixer
Uniformly mixing, you can the particle enhanced nickel base metal powder for ultrahigh speed laser melting coating is made.
Using above-mentioned particle enhanced nickel base metal powder, using superelevation rate laser melting and coating technique, different process of arranging in pairs or groups, into
Row surface manufactures and repairs.
The treatment of surfaces of components is treated to be machined out.
With acetone wiping parts to be processed surface, surface grease is removed.
Laser melting coating path planning is carried out according to piece surface geometry, formulates technological parameter.
The treatment of surfaces of components is treated using superelevation rate laser melting coating system and carries out cladding processing, is joined using following technique
Number：1 ~ 2kw of laser power, spot diameter 1mm, 5 ~ 8kg/h of powder feeding rate, laser scan rate 20m ~ 500m/min, overlapping rate
30% ~ 40%, 25 ~ 500 μm of individual layer cladding thickness, laser melting coating head has argon gas defencive function, 15 ~ 30L/min of argon flow amount.
The mass fraction of each element is as shown in embodiment 2 in table 1 in target product.The performance parameter of embodiment 2 such as 2 institute of table
Show.It is as shown in table 3 that Application Example 2 carries out superelevation rate laser melting coating processing rear surface performance.
Embodiment 3
The mass fraction of its each element is：0.05%C, 30%Cr, 0.5%Mo, 2.1%Nb, 10%Fe, 0.5%Al, 0.5%Ti, 0.5%
Mn, 0.6%Si, P≤0.030%, S≤0.030%, 5%WC powder and 10%TiC powder, surplus are Ni and inevitable impurity.
The metal powder grain size is：10-100μm；Mobility：16s/50g；Sphericity >=91%；D50=43μm。
Preparation method is：Composition of raw material alloying matches, and vacuum melting nickel ingot is then carried out, using Frequency Induction Heating
Melt nickel ingot, working chamber's vacuum degree 10-1-10-2Pa, using aerosolization method powder, gases argon pressure of dusting 1.2-
3.7MPa receives to carry out sizing after powder.
It is uniform in batch mixer for the powder after the WC powder of 10-100um and TiC powder, with screening to choose particle size range
Mixing, you can the particle enhanced nickel base metal powder for ultrahigh speed laser melting coating is made.
Using above-mentioned particle enhanced nickel base metal powder, using superelevation rate laser melting and coating technique, different process of arranging in pairs or groups, into
Row surface manufactures and repairs.
The treatment of surfaces of components is treated to be machined out.
With acetone wiping parts to be processed surface, surface grease is removed.
Laser melting coating path planning is carried out according to piece surface geometry, formulates technological parameter.
The treatment of surfaces of components is treated using superelevation rate laser melting coating system and carries out cladding processing, is joined using following technique
Number：1 ~ 2kw of laser power, spot diameter 1mm, 5 ~ 8kg/h of powder feeding rate, laser scan rate 20m ~ 500m/min, overlapping rate
30% ~ 40%, 25 ~ 500 μm of individual layer cladding thickness, laser melting coating head has argon gas defencive function, 15 ~ 30L/min of argon flow amount.
The mass fraction of each element is as shown in embodiment 3 in table 1 in target product.The performance parameter of embodiment 3 such as 2 institute of table
Show.It is as shown in table 3 that Application Example 3 carries out superelevation rate laser melting coating processing rear surface performance.
Compared with traditional laser melting and coating technique, ultrahigh speed laser melting and coating process has dramatically different, high energy in principle
Beam small part energy, which is acted on basis material, forms shallower molten bath, and most of energy has been acted on dusty material, is made
Powder temperature before molten bath is entered rises to fusing point and melts, and instills molten bath in droplets and is combined with basis material, then according to
By matrix itself cooled and solidified.Based on this principle, ultrahigh speed laser melting coating substantially reduces powder fusing time, so as to make to melt
It covers efficiency to significantly improve, generally can reach 10 times of conventional laser cladding or more.Correspondingly, particle enhanced nickel base metal powder gathers
Focal length matrix surface can reach 0.2 ~ 2mm, and for the powder after cladding head conveying convergence, amyloid plaque size is smaller, such as can
To reach 0.5 ~ 1mm of Φ, it can adapt to and realize that laser scanning linear velocity is more than or equal to 25m/min.
Claims (5)
1. a kind of particle enhanced nickel base metal powder for ultrahigh speed laser melting coating, it is characterised in that by Ni substrate metal powder
It is formed with oxide or carbide particle, proportioning is：The Ni substrate metal powder of 50-98%, the oxide of 2-50% or carbonization
Composition granule, the oxide or carbide particle are selected from Al2O3、ZrO2, one or more of WC, TiC；Wherein Ni substrate metal
The chemical composition and its mass percent of powder be：C≤0.1%, 2.0-30.0%Cr, 2.0-30.0%Mo, 0.1-5.0%Nb,
Fe≤6.0%, Al≤0.6%, Ti≤0.6%, Mn≤0.8%, Si≤0.8%, Co≤2.0%, P≤0.030%, S≤0.030% are remaining
It measures as Ni and inevitable impurity；
Wherein, the D50 of powder is 25-50 μm, and mobility is 32-47 s/100g.
2. metal powder according to claim 1, it is characterised in that：Cr content+Mo contents 5.0%-40.0%.
3. metal powder according to claim 1, it is characterised in that：Size distribution in：10-100μm.
4. metal powder according to claim 1, it is characterised in that：Han Yang Liang≤150ppm.
5. the preparation method of the metal powder as described in claim 1-4, which is characterized in that this method is：Composition of raw material closes
Aurification matches, and then carries out vacuum melting nickel ingot, melts nickel ingot, working chamber's vacuum degree 10 using Frequency Induction Heating-1-10- 2Pa, using aerosolization method powder, dust gases argon pressure 1.2-3.7MPa, receives to carry out sizing after powder, screen
The metal powder of 10-100 μm of particle size range；The oxide or carbide that particle size range is 10-100 μm are then chosen, will be made
The metal powder that the particle size range got ready is 10-100 μm is uniform in batch mixer by corresponding proportioning to oxide or carbide
Mixing, you can ultrahigh speed laser melting coating particle enhanced nickel base metal powder is made.
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| CN112828297A (en) * | 2020-12-31 | 2021-05-25 | 广东省科学院新材料研究所 | Nickel-based ceramic composite material and preparation method and application thereof |
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