CN108273988A - A kind of Co-based alloy powder for superelevation rate laser melting coating - Google Patents
A kind of Co-based alloy powder for superelevation rate laser melting coating Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 84
- 230000008018 melting Effects 0.000 title claims abstract description 51
- 238000002844 melting Methods 0.000 title claims abstract description 49
- 238000000576 coating method Methods 0.000 title claims abstract description 45
- 239000011248 coating agent Substances 0.000 title claims abstract description 43
- 239000000956 alloy Substances 0.000 title claims abstract description 32
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 34
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052786 argon Inorganic materials 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 238000012387 aerosolization Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000006698 induction Effects 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000004513 sizing Methods 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 25
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000012216 screening Methods 0.000 abstract description 6
- 238000010410 dusting Methods 0.000 abstract description 5
- 238000005275 alloying Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract 1
- 238000005253 cladding Methods 0.000 description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000004372 laser cladding Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 102220043159 rs587780996 Human genes 0.000 description 3
- 208000037259 Amyloid Plaque Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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- 238000007711 solidification Methods 0.000 description 1
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Classifications
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- B22F1/0003—
-
- 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
-
- 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%
-
- 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%
-
- 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
- C23C24/106—Coating with metal alloys or metal elements only
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention relates to a kind of Co-based alloy powders for superelevation rate laser melting coating, belong to steel material manufacturing field, and above-mentioned alloy powder chemical composition mass fraction is：C≤0.1%, 18.0-25.0%Cr, 7.0-11.0%Mo, 2.5-5.0%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.The powder size is distributed：10 100 μm, D50：25 50 μm, mobility：32 41s/100g, composition of raw material alloying proportioning, then carry out vacuum melting steel ingot, using Frequency Induction Heating melted steel ingot, 10 1 10 2Pa of working chamber's vacuum degree, using aerosolization method powder, 1.5 3.9MPa of gases argon pressure of dusting receives to carry out sizing after powder.Using the powder after screening, using superelevation rate laser melting and coating technique, different process of arranging in pairs or groups carries out surface manufacture and reparation.
Description
Technical field
The invention belongs to metal material fields, and in particular to a kind of nickel-base alloy powder for superelevation rate laser melting coating
End.
Background technology
Conventional laser melting and coating technique has many advantages, such as bond strength height, and thermal deformation is small, and can be by adjusting powdered ingredients
Cladding layer capability needed for obtaining, therefore start to realize in all conglomeraties and apply, but the technology processing efficiency is relatively low, cladding speed
Rate is generally 0.5 ~ 3m/min, and powder using efficiency is low, and general 50% or so, and focusing laser energy passes through on basis material
Fusing basis material mixes and combining powder, this makes laser energy utilizing rate and cladding rate low, powder and matrix material
Still it is solid granulates when material combines, finished surface smoothness is poor.Due to its inefficiency, of high cost, limits its and extensive produce
Industry application, and bottleneck problem urgently to be resolved hurrily at present.
Meanwhile the powder used in conventional laser cladding has corresponding granularity.The particle size powders are conveyed through cladding head and are converged
Afterwards, amyloid plaque diameter is usually larger.
Invention content
The present invention relates to a kind of superelevation rate laser cladding methods, especially Co-based alloy powder used in this method.
Superelevation rate laser melting coating is a kind of Surface-micromachining process, by synchronous powder feeding system adding material mode, is made using the line of high-energy-density
The substrate material surface that added material is moved with high-speed melts simultaneously, and quickly formation dilution rate is extremely low after solidification, with matrix
In the cladding layer of metallurgical binding, cladding rate is greatly improved, significantly improves the wear-resisting, anti-corrosion, heat-resisting of substrate material surface, antioxygen
The process of the operational characteristiies such as change.
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 acted on dusty material, makes powder temperature before entering molten bath
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.
Correspondingly, superelevation rate laser melting coating proposes powder new requirement.Such as the following index of powder all exists
New requirement：1. particle size range, the size of metal powder granulates are usually characterized with the diameter of particle；2. mobility, refer to
A certain amount of powder flows through the standard funnel required time of predetermined hole diameter to indicate, the unit of generally use is s/50g, number
It is worth the smaller mobility for illustrating the powder better；3. sphericity, the shape degree similar with sphere of particle；4.D50 describing powder
The index of last average particle size, the cumulative particle sizes percentile for referring to a sample reach grain size corresponding when 50%.
It should be noted that the nickel-base alloy of the application is that have higher intensity and certain antioxidant anticorrosive energy under high temperature
A kind of alloy of the comprehensive performances such as power.It is with outstanding inorganic acid resistance corrosive power, the various corruption to oxidation and reducing environment
Losing medium all has very outstanding resistance to corrosion, is the good coat being modified for anti-corrosion, high-temperature oxidation resistant environmental surfaces
Material.Ultrahigh speed in the present invention is for existing laser melting coating speed, which specifically refers to laser and sweep
It retouches linear velocity and is more than or equal to 25m/min.
According to an aspect of the present invention, the present invention provides a kind of Co-based alloy powder for superelevation rate laser melting coating,
The mass fraction of its each element is：C≤0.1%, 18.0-25.0%Cr, 7.0-11.0%Mo, 2.5-5.0%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 not
Evitable impurity；Wherein, the D50 of the powder is 25-50 μm, mobility 32-41s/100g.
According to an aspect of the present invention, the preferred 3.0-4.5% of the preferred 20.0-23.0% of Cr, M o preferred 8.0-10.0%, Nb.
According to an aspect of the present invention, which is：10-100μm.
According to an aspect of the present invention, the method for preparing above-mentioned superelevation rate laser melting coating Co-based alloy powder is：Former material
Expect composition alloyization proportioning, vacuum melting steel ingot is then carried out, using Frequency Induction Heating melted steel ingot, working chamber's vacuum degree
10-1-10-2Pa, using aerosolization method powder, dust gases argon pressure 1.5-3.9MPa, receives to carry out granularity after powder
Screening.
According to an aspect of the present invention, the control of vacuum degree has significant impact for indexs such as powder oxygen content, and dust gas
The pressure control of argon gas is to control the core parameter of powder size, sphericity and powder formation rate, need comprehensively according to liquid stream situation and
Each period of dusting makes 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.
According to an aspect of the present invention, superelevation rate laser cladding method of the invention is as follows：
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 single layer cladding thickness, laser melting coating head has argon gas defencive function, 15 ~ 30L/min of argon flow amount.
Compared with the prior art, the advantages of the present invention are as follows：
1. the metal powder is arranged in pairs or groups with preferred alloy content, superelevation rate laser melting coating is can adapt to, cladding layer can be fine and close
It is combined with matrix to consolidation, cladding layer has excellent anti-corrosion and pyro-oxidation resistance, economic performance 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 a particular/special requirement to indexs such as metal powder granularity, mobility, involved by the present invention
And superelevation rate laser melting coating with Co-based alloy powder be suitable for the processing technology.
Specific implementation mode
With reference to embodiment, the invention will be further described, but is not limited to the following example.Target in embodiment
The mass fraction of each element is as shown in table 1 in product, and performance parameter is as shown in table 2, and Application Example carries out superelevation rate laser
It is as shown in table 3 that rear surface performance is processed in cladding.
1 superelevation rate laser melting coating Co-based alloy powder ingredient of table（Mass fraction, %）
| Embodiment | C | Cr | Mo | Nb | Fe | Al | Ti | Mn | Si | Co | P、S | Ni |
| Embodiment 1 | 0.05 | 19.2 | 9.5 | 3.4 | 3.6 | 0.42 | 0.33 | 0.65 | 0.58 | 1.2 | ≤0.03 | Surplus |
| Embodiment 2 | 0.03 | 22.1 | 8.9 | 2.9 | 5.2 | 0.33 | 0.29 | 0.53 | 0.45 | 0.9 | ≤0.03 | Surplus |
| Embodiment 3 | 0.08 | 24.5 | 7.8 | 4.1 | 4.5 | 0.52 | 0.49 | 0.75 | 0.64 | 1.6 | ≤0.03 | Surplus |
2 superelevation rate laser melting coating Co-based alloy powder performance parameter of table
| Embodiment | Granularity μm | Mobility s/50g | Sphericity % | D50/μm |
| Embodiment 1 | 10-100 | 19 | 92 | 40 |
| Embodiment 2 | 10-100 | 17 | 94 | 46 |
| Embodiment 3 | 10-100 | 16 | 97 | 50 |
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
Present embodiments provide Co-based alloy powder used in a kind of superelevation rate laser cladding method and this method.This is super
High-rate laser melting and coating process, includes the following steps：
The small part energy of control laser acts on basis material upper surface and forms shallower molten bath, the effect of laser major part energy
On the alloy powder above basis material；
Alloy powder temperature before entering molten bath rises to fusing point and melts, and instills molten bath and basis material knot in droplets
It closes.
It is understood that since traditional technique is all that focusing laser energy is melted densification on basis material
Matrix itself melts the needs of the time spent by matrix and greatly increases, this is dramatically under the effect of identical laser energy
Cladding speed is limited, the utilization rate of powder is reduced, on the contrary, laser energy is dexterously acted on alloy powder in the present invention
On so that powder is combined in such a way that drop is non-particulate with basis material, has both reduced the waste of expensive powder, more improve
Cladding speed obtains higher combined with firmness and surface flatness.Laser energy is acted on alloy powder and for example may be used
To be realized by controlling and adjusting the focal position of laser energy.
Preferably, alloy powder instills cold by basis material itself after molten bath is combined with basis material in droplets
But it solidifies.
Preferably, focusing laser beam makes 80% or more laser energy act on alloy powder.
Preferably, laser defocusing amount 1 ~ 2mm above basis material, laser light are set relative to the upper surface of basis material
Spot size 1.0 ~ Φ of Φ 1.5mm.
Preferably, the mass fraction of Co-based alloy powder each element is：0.05%C, 19.2%Cr, 9.5%Mo, 3.4%Nb,
3.6%Fe, 0.42%Al, 0.33%Ti, 0.65%Mn, 0.58%Si, 1.2%Co, P≤0.030%, S≤0.030%, surplus be Ni and
Inevitable impurity.
Preferably, which is：10-100 μm, mobility：19 s/50g, sphericity >=92%, D50=
40μm。
Preferably, powder size section is 15 ~ 45 μm.Sphericity >=94%, Han Yang Liang≤150ppm.Mobility is 20s/
50g.Hollow powder rate ＜ 1%.
Preferably, a kind of Co-based alloy powder for superelevation rate laser melting coating, the quality of each element are additionally provided
Score is：C≤0.1%, 18.0-25.0%Cr, 7.0-11.0%Mo, 2.5-5.0%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 the powder is 25-50 μm, mobility 32-41s/100g.
Preferably, the preferred 20.0-23.0% of Cr.
Preferably, the preferred 8.0-10.0% of Mo.
Preferably, the preferred 3.0-4.5% of Nb.
Preferably, preparation method is：Composition of raw material alloying matches, and vacuum melting steel ingot is then carried out, using intermediate frequency
Sensing heating fusing steel ingot, working chamber vacuum degree 10-1-10-2Pa, using aerosolization method powder, gases argon pressure of dusting
1.5-3.9MPa receives to carry out sizing after powder.
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 single layer cladding thickness, laser melting coating head has argon gas defencive function, 15 ~ 30L/min of argon flow amount.
In target product in the mass fraction of each element such as table 1 shown in embodiment 1.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, 22.1%Cr, 8.9%Mo, 2.9%Nb, 5.2%Fe, 0.33%Al, 0.29%Ti,
0.53%Mn, 0.45%Si, 0.9%Co, P≤0.030%, S≤0.030%, surplus are Ni and inevitable impurity.
The metal powder grain size is：10-100 μm, mobility：17s/50g, sphericity >=94%, D50=46 μm.
Preparation method is：Composition of raw material alloying matches, and vacuum melting steel ingot is then carried out, using Frequency Induction Heating
Melted steel ingot, working chamber vacuum degree 10-1-10-2Pa, using aerosolization method powder, gases argon pressure of dusting 1.5-
3.9MPa receives to carry out sizing after powder.
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 single layer cladding thickness, laser melting coating head has argon gas defencive function, 15 ~ 30L/min of argon flow amount.
In target product in the mass fraction of each element such as table 1 shown in embodiment 2.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：0.08%C, 24.5%Cr, 7.8%Mo, 4.1%Nb, 4.5%Fe, 0.52%Al, 0.49%Ti,
0.75%Mn, 0.64%Si, 1.6%Co, P≤0.030%, S≤0.030%, surplus are Ni and inevitable impurity.
The metal powder grain size is：10-100 μm, mobility：16s/50g, sphericity >=97%, D50=50 μm.
Preparation method is：Composition of raw material alloying matches, and vacuum melting steel ingot is then carried out, using Frequency Induction Heating
Melted steel ingot, working chamber vacuum degree 10-1-10-2Pa, using aerosolization method powder, gases argon pressure of dusting 1.5-
3.9MPa receives to carry out sizing after powder.
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 single layer cladding thickness, laser melting coating head has argon gas defencive function, 15 ~ 30L/min of argon flow amount.
In target product in the mass fraction of each element such as table 1 shown in embodiment 3.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 acts on basis material, forms shallower molten bath, and most of energy has acted on dusty material, makes
Powder temperature before entering molten bath 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, to make to melt
It covers efficiency to significantly improve, generally can reach 10 times of conventional laser cladding or more.Correspondingly, particle enhancing powder metal composition is poly-
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 (9)
1. a kind of superelevation rate laser melting coating Co-based alloy powder, it is characterised in that component is with mass percent：C≤
0.1%, 18.0-25.0%Cr, 7.0-11.0%Mo, 2.5-5.0%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 powder
The D50 at end is 25-50 μm, mobility 32-41s/100g.
2. alloy powder according to claim 1, it is characterised in that：Cr 20.0-23.0%.
3. alloy powder according to claim 1 or 2, it is characterised in that：Mo8.0-10.0%.
4. alloy powder according to claim 1 or 2 or 3, it is characterised in that：Nb3.0-4.5%.
5. alloy powder according to claim 1, it is characterised in that：Size distribution is：10-100μm.
6. alloy powder according to claim 4, it is characterised in that：Sphericity >=94%.
7. alloy powder according to claim 4, it is characterised in that：Han Yang Liang≤150ppm.
8. the alloy powder as described in claim 1-7, which is characterized in that hollow powder rate ＜ 1%.
9. the preparation method of alloy powder according to claims 1-8, which is characterized in that this method is：Composition of raw material closes
Aurification matches, and vacuum melting steel ingot is then carried out, using Frequency Induction Heating melted steel ingot, working chamber's vacuum degree 10-1-10- 2Pa, using aerosolization method powder, dust gases argon pressure 1.5-3.9MPa, receives to carry out sizing after powder.
Priority Applications (1)
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| CN110303163A (en) * | 2019-05-23 | 2019-10-08 | 中国人民解放军第五七一九工厂 | A kind of high-strength high cracking resistance laser gain material reparation composite powder and preparation method |
| CN110484916A (en) * | 2019-09-24 | 2019-11-22 | 烟台奥德新材料有限公司 | A kind of high speed and ultrahigh speed laser melting coating Co-based alloy powder |
| CN110936098A (en) * | 2019-11-07 | 2020-03-31 | 江苏特维克科技有限公司 | High-medium pressure cylinder body split surface defect repairing process |
| CN111058025A (en) * | 2019-12-02 | 2020-04-24 | 中车青岛四方机车车辆股份有限公司 | Axle remanufacturing method |
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| CN112746270A (en) * | 2019-10-29 | 2021-05-04 | 中国铁建重工集团股份有限公司道岔分公司 | Laser cladding method of high manganese steel frog and high manganese steel frog |
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| CN114293067A (en) * | 2021-12-27 | 2022-04-08 | 上海康晟航材科技股份有限公司 | High-temperature alloy for electronic firework push rod and preparation process and application thereof |
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| CN110228944A (en) * | 2019-06-26 | 2019-09-13 | 王辉 | Rock wool is at fine supercentrifuge roller head |
| CN112317738B (en) * | 2019-07-31 | 2023-07-14 | 株式会社沙迪克 | Method for producing material powder for metal laminate molding |
| CN112317738A (en) * | 2019-07-31 | 2021-02-05 | 株式会社沙迪克 | Method for producing material powder for metal laminate molding |
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| CN112746270A (en) * | 2019-10-29 | 2021-05-04 | 中国铁建重工集团股份有限公司道岔分公司 | Laser cladding method of high manganese steel frog and high manganese steel frog |
| CN110936098A (en) * | 2019-11-07 | 2020-03-31 | 江苏特维克科技有限公司 | High-medium pressure cylinder body split surface defect repairing process |
| CN111058025A (en) * | 2019-12-02 | 2020-04-24 | 中车青岛四方机车车辆股份有限公司 | Axle remanufacturing method |
| CN111926216A (en) * | 2020-07-13 | 2020-11-13 | 燕山大学 | Alloying powder of corrosion-resistant layer for automobile skin and laser alloying method |
| CN113084181A (en) * | 2021-04-12 | 2021-07-09 | 辽宁冠达新材料科技有限公司 | Preparation method of GH3230 nickel-based superalloy powder for 3D printing |
| CN113604708A (en) * | 2021-08-18 | 2021-11-05 | 沈阳大陆激光先进制造技术创新有限公司 | Functional layer alloy material for laser manufacturing and remanufacturing of hot top crystallizer copper plate and preparation method thereof |
| CN114293067A (en) * | 2021-12-27 | 2022-04-08 | 上海康晟航材科技股份有限公司 | High-temperature alloy for electronic firework push rod and preparation process and application thereof |
| CN114480920A (en) * | 2021-12-31 | 2022-05-13 | 中南大学 | Nickel-based high-temperature alloy powder for 3D printing and preparation method and application thereof |
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