CN105908018A - Novel composite thermal spraying powder and preparation method thereof - Google Patents
Novel composite thermal spraying powder and preparation method thereof Download PDFInfo
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- CN105908018A CN105908018A CN201610319105.2A CN201610319105A CN105908018A CN 105908018 A CN105908018 A CN 105908018A CN 201610319105 A CN201610319105 A CN 201610319105A CN 105908018 A CN105908018 A CN 105908018A
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- new type
- hot spray
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- 239000000843 powder Substances 0.000 title claims abstract description 77
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 238000007751 thermal spraying Methods 0.000 title abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 35
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000011651 chromium Substances 0.000 claims abstract description 30
- 238000011065 in-situ storage Methods 0.000 claims abstract description 29
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052796 boron Inorganic materials 0.000 claims abstract description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 239000007921 spray Substances 0.000 claims description 38
- 239000000956 alloy Substances 0.000 claims description 35
- 229910045601 alloy Inorganic materials 0.000 claims description 34
- 238000000576 coating method Methods 0.000 claims description 27
- 239000011248 coating agent Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 24
- 239000002994 raw material Substances 0.000 claims description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 16
- 238000000889 atomisation Methods 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 238000010286 high velocity air fuel Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- 229910000521 B alloy Inorganic materials 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- NUEWEVRJMWXXFB-UHFFFAOYSA-N chromium(iii) boride Chemical compound [Cr]=[B] NUEWEVRJMWXXFB-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000010422 painting Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 7
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910001120 nichrome Inorganic materials 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009689 gas atomisation Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 239000010742 number 1 fuel oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910009043 WC-Co Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/06—Alloys based on chromium
-
- 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
-
- 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
-
- 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
- B22F2009/0848—Melting process before atomisation
-
- 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
- B22F2009/088—Fluid nozzles, e.g. angle, distance
Abstract
The invention discloses a novel composite thermal spraying powder and a preparation method thereof, wherein the powder comprises the following main components: 2-7 wt.% of aluminum (Al), 40-75 wt.% of chromium (Cr), 0.1-0.3 wt.% of boron (B), 3-8 wt.% of carbon (C), and the balance of nickel (Ni); and the particle size of the powder is: 5-125 μm, and the main particle size is 15-75 μm; the main particle size means that more than 60% of powder in the particle size range is contained. The powder has high sphericity, uniform components, low oxygen content, controllable preparation process, high chromium carbide content, and strip shape precipitation in-situ self-generation manner.
Description
Technical field
The present invention relates to powder body processing and metal coating layer material technical field, particularly relate to a kind of NEW TYPE OF COMPOSITE hot spray powder
And preparation method.
Background technology
The inefficacy of modern industry parts is frequently experienced in the use surface of parts, therefore, uses advanced surface to process
Inefficacy surface coating in the crucial coating of component surface preparation or is repaired by technology (such as thermal spraying), will be at very great Cheng
Meet the parts use requirement to different operating modes on degree, improve the service life of parts.But along with modern manufacturing industry
Development further, the application operating mode of industrial part is the harshest, and the metal or alloy material using single structure is made
Standby coating has been difficult to meet day by day complicated wear-and corrosion-resistant demand.Pottery opposing metallic is used to carry out the pottery-gold strengthened mutually
Belong to composite because being compounded with ceramic phase high rigidity, high-melting-point, erosion-resisting and metal phase high tenacity, easily processing simultaneously
Feature, be therefore widely used in automobile (such as piston ring), Aero-Space (such as undercarriage), metallurgical (as
Sinking roller) and the industrial or civilian component that have higher requirements anti-corrosion to surface abrasion resistance such as papermaking (such as Corrugator roller) in.Conventional
Ceramic reinforced metal composite have WC-Co, Cr3C2-NiCr etc., but due to WC class pottery working condition more than 550 DEG C
Meeting oxidation Decomposition, it is impossible to for middle high temperature applications, and Cr3C2Although stable performance can be kept below 800 DEG C, but metal
The performance of phase NiCr but can raise along with temperature and be decreased obviously.Therefore, for current parts thereof, such as large-scale heavy duty
The demand to wear and corrosion behavior under middle hot conditions such as the bent axle of marine diesel engine, air bleeding valve, piston ring, urgently
A kind of novel metal-ceramic composite material and respective coatings need to be prepared and use requirement to meet it, improve it and use the longevity
Life.
Prior art is in preparing the composite powder that ceramic reinforced metal composite coating is used, and ceramic phase often uses outer adding
Add mode adds, and carries out sintering of reuniting after typically directly ceramic particle and metallic particles being mixed or both mixed, this kind of
The composite powder uneven components added outside ceramic phase, the combination between ceramic phase and metal phase is poor, and ceramic phase easily exists
Spraying process disperse or degrades, causing the problems such as spray deposited rate is low, coating performance is poor.Further, due to outer interpolation
Ceramic phase often uses the ceramic particle with many arris, deposits to tend to make in coating in follow-up wear process
Grind the excessive wear of material in pairs.
Summary of the invention
It is an object of the invention to provide a kind of NEW TYPE OF COMPOSITE hot spray powder and preparation method, this powder sphericity is high, composition
Uniformly, oxygen content low, preparation flow is controlled, and in powder, chromium carbide content is high, and is strip analysis in in-situ authigenic mode
Go out.
A kind of NEW TYPE OF COMPOSITE hot spray powder, being mainly composed of included in described powder:
The carbon C of the boron of chromium Cr, 0.1～0.3wt.%, 3～the 8wt.% of aluminum Al, 40～the 75wt.% of 2～7wt.%, surplus are nickel
Ni；
And the granularity of described powder is: 5～125 μm, main body granularity is 15～75 μm；Described main body granularity refers to this granularity model
Enclose interior powder and account for more than 60%.
A kind of preparation method of NEW TYPE OF COMPOSITE hot spray powder, described preparation method includes:
First raw material is extracted by the mass ratio set；Wherein, the raw material extracted comprises: the aluminum Al of 2～7wt.%,
The carbon C of the boron of chromium Cr, 0.1～0.3wt.%, 3～the 8wt.% of 40～75wt.%, surplus are nickel；
The raw material extracted is put in vacuum melting crucible, use the mode of vacuum induction melting-inert gas atomizer to obtain
The Ni that chromium carbide in-situ authigenic strengthens3Al base alloy powder；
Obtained alloy powder is carried out shaking-sieving or air current classifying processes, prepare chromium carbide in-situ authigenic and strengthen
Ni3The hot spray powder of Al base alloy.
The content of the in-situ authigenic chromium carbide obtained is 35～85vol.%；
And structure is Cr7C3、Cr3C2、Cr23C6In one or more be composited, be shaped as strip.
Boron in described raw material is ni-b alloy, chromium-boron alloy or both mixture；And the content of boron is in alloy
18～21wt.%.
The mode of described vacuum induction melting-inert gas atomizer particularly as follows:
First with intermediate frequency furnace, raw material being added heat refining, vacuum≤10Pa in stove, heating rate is
5～20 DEG C/min, after being warming up to 1360 DEG C, will heat up speed be down to 5～10 DEG C/min, and continuous heating is extremely
1600 DEG C～1700 DEG C, carrying out isothermal holding subsequently, temperature retention time is 30～90min, carries out electromagnetism in insulating process simultaneously
Stirring, magnetic stirrer frequency 3000～5000Hz, through tundish and entrance atomization tank of leting slip a remark after raw alloy liquid is uniform
In；
Then the mode using inert gas atomizer makes aluminium alloy atomization solidification, makes chromium carbide in-situ authigenic separate out simultaneously, obtains
Obtain the N that chromium carbide in-situ authigenic strengthensi3Al base alloy powder.
Described let slip a remark a diameter of 2～8mm, the inert atomizing gas used is argon or nitrogen；
Atomizer selects folding and unfolding type circumferential weld nozzle, and atomization cone angle is 40～80 °, and atomizing pressure is 2.5～5MPa.
Described method also includes:
Chromium carbide in-situ self-generated reinforced Ni obtained by using further3The hot spray powder of Al base alloy prepares compound painting
Layer, the heat spraying method used includes but not limited to plasma spray coating process or HVAF technique, wherein:
In plasma spray coating process: spray power 30～50Kw, argon flow amount 35～50l/min, hydrogen flowing quantity
5～9l/min, powder feeding rate 30～65g/min, spray distance 100～140mm；
In HVAF technique: kerosene oil flow 22～30l/h, oxygen flow 800～1000l/h, powder feeding rate
45～80g/min, spray distance 350～400mm.
The thickness of prepared composite coating is 0.1～1mm, and microhardness scope is Hv0.3500～Hv0.31100, bond strength
Scope is 30～85MPa.
As seen from the above technical solution provided by the invention, the sphericity of this powder is high, composition is uniform, oxygen content
Low, preparation flow is controlled, and in powder, chromium carbide content is high, and is that strip separates out in in-situ authigenic mode；And can make
The coating prepared combines excellent, has that hardness is high, coefficient of friction is low, wearability good, resistance in the range of 25 DEG C～700 DEG C
The features such as corrosion anti-erosion property is excellent.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, required use in embodiment being described below
Accompanying drawing is briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain according to these accompanying drawings
Other accompanying drawings.
Fig. 1 is the preparation method schematic flow sheet of the embodiment of the present invention provided NEW TYPE OF COMPOSITE hot spray powder.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly and completely
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiments of the invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into protection scope of the present invention.
Embodiments provide a kind of NEW TYPE OF COMPOSITE hot spray powder, being mainly composed of included in this powder:
The carbon C of the boron of chromium Cr, 0.1～0.3wt.%, 3～the 8wt.% of aluminum Al, 40～the 75wt.% of 2～7wt.%, surplus are nickel
Ni；
And the granularity of described powder is: 5～125 μm, main body granularity is 15～75 μm；Here, main body granularity refers to this grain
In the range of degree, powder accounts for more than 60%.
The embodiment of the present invention additionally provides the preparation method of a kind of NEW TYPE OF COMPOSITE hot spray powder, is illustrated in figure 1 the present invention real
Executing the schematic flow sheet of the provided preparation method of example, described preparation method includes:
Step 11: first extract raw material by the mass ratio set；
In this step, the raw material extracted comprises: the chromium Cr of aluminum Al, 40～the 75wt.% of 2～7wt.%,
The carbon C of boron, 3～the 8wt.% of 0.1～0.3wt.%, surplus are nickel；
Boron in described raw material is ni-b alloy, chromium-boron alloy or both mixture；And the content of boron is in alloy
18～21wt.%.
Step 12: put into by the raw material extracted in vacuum melting crucible, uses vacuum induction melting-inert gas atomizer
Mode obtains the Ni that chromium carbide in-situ authigenic strengthens3Al base alloy powder；
In this step, the content of the in-situ authigenic chromium carbide obtained is 35～85vol.%；And structure is Cr7C3、
Cr3C2、Cr23C6In one or more be composited, be shaped as strip.
Here, above-mentioned vacuum induction melting-inert gas atomizer mode particularly as follows:
First with intermediate frequency furnace, raw material being added heat refining, vacuum≤10Pa in stove, heating rate is
5～20 DEG C/min, after being warming up to 1360 DEG C, will heat up speed be down to 5～10 DEG C/min, and continuous heating is extremely
1600 DEG C～1700 DEG C, carrying out isothermal holding subsequently, temperature retention time is 30～90min, carries out electromagnetism in insulating process simultaneously
Stirring, magnetic stirrer frequency 3000～5000Hz, through tundish and entrance atomization tank of leting slip a remark after raw alloy liquid is uniform
In；
Then the mode using inert gas atomizer makes aluminium alloy atomization solidification, makes chromium carbide in-situ authigenic separate out simultaneously, obtains
Obtain the N that chromium carbide in-situ authigenic strengthensi3Al base alloy powder.
During implementing, the above-mentioned diameter let slip a remark can be 2～8mm, and the inert atomizing gas used can be argon
Or nitrogen；Atomizer selects folding and unfolding type circumferential weld nozzle, and atomization cone angle is 40～80 °, and atomizing pressure is 2.5～5MPa.
Step 13: obtained alloy powder is carried out shaking-sieving or air current classifying processes, prepare chromium carbide in situ
Self-generated reinforced Ni3The hot spray powder of Al base alloy.
It addition, obtaining above-mentioned chromium carbide in-situ self-generated reinforced Ni3After the hot spray powder of Al base alloy, the most also may be used
Preparing composite coating with the hot spray powder obtained by using, the heat spraying method used includes but not limited to plasma
Spraying coating process or HVAF technique, wherein:
In plasma spray coating process: spray power 30～50Kw, argon flow amount 35～50l/min, hydrogen flowing quantity
5～9l/min, powder feeding rate 30～65g/min, spray distance 100～140mm；
In HVAF technique: kerosene oil flow 22～30l/h, oxygen flow 800～1000l/h, powder feeding rate
45～80g/min, spray distance 350～400mm.
The thickness of finally obtained composite coating can be 0.1～1mm, and microhardness may range from
Hv0.3500～Hv0.31100, bond strength may range from 30～85MPa.
Below in conjunction with instantiation, the preparation process of above-mentioned hot spray powder and composite coating is described in detail:
Example 1, first take raw material by following mass ratio, aluminum Al:5.2wt.%, chromium Cr:55.3wt.%, boron:
0.21wt.%, carbon C:5.0wt.%, nickel: surplus；And in vacuum melting crucible, it is sequentially placed into nickel plate, ni-b alloy
Block, chromium block, graphite block.
Then using intermediate frequency furnace that raw material adds heat refining, vacuum 9.6Pa in stove, heating rate is
15 DEG C/min, will heat up speed after being warming up to 1360 DEG C and be down to 7 DEG C/min, and continuous heating is to 1650 DEG C, protects subsequently
Temperature processes, and temperature retention time is 45min, magnetic stirrer frequency 4000Hz, and period substep adds aluminium block and carries out melting；
Obtained aluminium alloy carries out high pressure argon gas atomization in tundish and entrance atomization tank of leting slip a remark, and let slip a remark a diameter of 4mm,
Atomization cone angle is 60 °, and atomizing pressure is 3.5MPa.Powder after atomization is carried out air current classifying process, obtains chromium carbide former
Position self-generated reinforced Ni3The NEW TYPE OF COMPOSITE hot spray powder of Al base alloy, and the particle diameter of this powder is distributed as: 10～105 μm.
Gained powder sphericity is high, and oxygen content is low, and for 400ppm, in powder, chromium carbide is strip, is evenly distributed, and contains
Amount is 63vol.%.
Further, the above-mentioned obtained chromium carbide in-situ self-generated reinforced Ni of HVAF is used3Answering of Al base alloy
Close powder, prepare chromium carbide in-situ self-generated reinforced Ni3The composite coating of Al base alloy, concrete spraying parameter is: coal
Oil flow 26l/h, oxygen flow 900l/h, powder feeding rate 50g/min, spray distance 380mm.
Final prepared coating structure even compact, coating room temperature microhardness is Hv0.31011.1, bond strength
80.24MPa, microhardness Hv at 700 DEG C1755.6。
Example 2, first take raw material by following mass ratio, aluminum Al:3.8wt.%, chromium Cr:66.8wt.%, boron:
0.23wt.%, carbon C:6.0wt.%, nickel: surplus；And in vacuum melting crucible, it is sequentially placed into nickel plate, ni-b alloy
Block, chromium block, graphite block.
Then using intermediate frequency furnace that raw material adds heat refining, vacuum 9.7Pa in stove, heating rate is
15 DEG C/min, will heat up speed after being warming up to 1360 DEG C and be down to 7 DEG C/min, and continuous heating is to 1670 DEG C, temperature retention time 20
Minute, magnetic stirrer frequency 5000Hz, period substep adds aluminium block and carries out melting；
Obtained aluminium alloy carries out high pressure argon gas atomization in tundish and entrance atomization tank of leting slip a remark, and let slip a remark a diameter of 5mm,
Atomization cone angle is 65 °, and atomizing pressure is 4.0MPa.Powder after atomization is carried out vibrations sieve staged care, obtain carbonization
Chromium in-situ self-generated reinforced Ni3The NEW TYPE OF COMPOSITE hot spray powder of Al base alloy, and powder diameter is distributed as: 15～115 μm.
Gained powder sphericity is high, and oxygen content is low, and for 450ppm, in powder, chromium carbide is strip, is evenly distributed, and contains
Amount is 76vol.%.
Further, the above-mentioned obtained chromium carbide in-situ self-generated reinforced Ni of HVAF is used3Answering of Al base alloy
Close powder, prepare chromium carbide in-situ self-generated reinforced Ni3The composite coating of Al base alloy, concrete spraying parameter is: coal
Oil flow 28l/h, oxygen flow 950l/h, powder feeding rate 45g/min, spray distance 370mm.
Final prepared coating structure even compact, coating room temperature microhardness is Hv0.31031.4, bond strength
79.76MPa, microhardness Hv at 700 DEG C1799.6。
Chromium carbide in-situ self-generated reinforced Ni prepared by example 1,2 as shown in table 1 below3The NEW TYPE OF COMPOSITE coating of Al base alloy with
Existing commercial Cr3C2-NiCr coating is microhardness (Hv in the range of 25～700 DEG C1) contrast:
Table 1
Chromium carbide in-situ self-generated reinforced Ni prepared by example 1,2 as shown in table 2 below3The NEW TYPE OF COMPOSITE coating of Al base alloy with
Existing commercial Cr3C2-NiCr coating is at coefficient of friction and wearability (including self wear extent and the wear extent to mill part) aspect
Contrast:
Table 2
Wherein, friction and wear test uses GermanyIV high temperature reciprocating friction abrasion tester, coating is to try in perpetual motion
Sample, is static lower sample to mill part, and test load is 100N, and frequency is 50Hz, and stroke is 2mm, and wearing-in period is
30min, temperature is respectively room temperature, 300 DEG C, 600 DEG C.Room temperature and 300 DEG C of tests are casting pig to mill part, 600 DEG C of tests
It is 304 rustless steels to mill part.
From above-mentioned contrast: the microhardness scope of this coating is Hv0.3500～Hv0.31100, bond strength scope is
30～85MPa, there is excellent antifriction, wear-resisting, anti-corrosion and scour resistance, antifriction in the range of can be used for 25～800 DEG C,
The occasions such as wear-resisting, anti-corrosion, antiscour.
In sum, the sphericity of powder described in the embodiment of the present invention is high, composition is uniform, oxygen content is low, and preparation flow can
Control, in powder, chromium carbide content is high, and is that strip separates out in in-situ authigenic mode；And the coating knot prepared can be made
Close excellent, in the range of 25 DEG C～700 DEG C, have that hardness is high, coefficient of friction is low, wearability good, corrosion-resistant anti-erosion property
The feature such as excellent.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change that can readily occur in or replace
Change, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with claims
Protection domain is as the criterion.
Claims (8)
1. a NEW TYPE OF COMPOSITE hot spray powder, it is characterised in that being mainly composed of included in described powder:
The carbon C of the boron of chromium Cr, 0.1～0.3wt.%, 3～the 8wt.% of aluminum Al, 40～the 75wt.% of 2～7wt.%, surplus are nickel
Ni；
And the granularity of described powder is: 5～125 μm, main body granularity is 15～75 μm；Described main body granularity refers to this granularity model
Enclose interior powder and account for more than 60%.
2. the preparation method of a NEW TYPE OF COMPOSITE hot spray powder, it is characterised in that described preparation method includes:
First raw material is extracted by the mass ratio set；Wherein, the raw material extracted comprises: the aluminum Al of 2～7wt.%,
The carbon C of the boron of chromium Cr, 0.1～0.3wt.%, 3～the 8wt.% of 40～75wt.%, surplus are nickel；
The raw material extracted is put in vacuum melting crucible, use the mode of vacuum induction melting-inert gas atomizer to obtain
The Ni that chromium carbide in-situ authigenic strengthens3Al base alloy powder；
Obtained alloy powder is carried out shaking-sieving or air current classifying processes, prepare chromium carbide in-situ authigenic and strengthen
Ni3The hot spray powder of Al base alloy.
3. the preparation method of NEW TYPE OF COMPOSITE hot spray powder as claimed in claim 2, it is characterised in that
The content of the in-situ authigenic chromium carbide obtained is 35～85vol.%；
And structure is Cr7C3、Cr3C2、Cr23C6In one or more be composited, be shaped as strip.
4. the preparation method of NEW TYPE OF COMPOSITE hot spray powder as claimed in claim 2, it is characterised in that
Boron in described raw material is ni-b alloy, chromium-boron alloy or both mixture；And the content of boron is in alloy
18～21wt.%.
5. the preparation method of NEW TYPE OF COMPOSITE hot spray powder as claimed in claim 2, it is characterised in that described vacuum induction
The mode of melting-inert gas atomizer particularly as follows:
First with intermediate frequency furnace, raw material being added heat refining, vacuum≤10Pa in stove, heating rate is
5～20 DEG C/min, after being warming up to 1360 DEG C, will heat up speed be down to 5～10 DEG C/min, and continuous heating is extremely
1600 DEG C～1700 DEG C, carrying out isothermal holding subsequently, temperature retention time is 30～90min, carries out electromagnetism in insulating process simultaneously
Stirring, magnetic stirrer frequency 3000～5000Hz, through tundish and entrance atomization tank of leting slip a remark after raw alloy liquid is uniform
In；
Then the mode using inert gas atomizer makes aluminium alloy atomization solidification, makes chromium carbide in-situ authigenic separate out simultaneously, obtains
Obtain the Ni that chromium carbide in-situ authigenic strengthens3Al base alloy powder.
6. the preparation method of NEW TYPE OF COMPOSITE hot spray powder as claimed in claim 5, it is characterised in that
Described let slip a remark a diameter of 2～8mm, the inert atomizing gas used is argon or nitrogen；
Atomizer selects folding and unfolding type circumferential weld nozzle, and atomization cone angle is 40～80 °, and atomizing pressure is 2.5～5MPa.
7. the preparation method of NEW TYPE OF COMPOSITE hot spray powder as claimed in claim 2, it is characterised in that described method is also wrapped
Include:
Chromium carbide in-situ self-generated reinforced Ni obtained by using further3The hot spray powder of Al base alloy prepares compound painting
Layer, the heat spraying method used includes but not limited to plasma spray coating process or HVAF technique, wherein:
In plasma spray coating process: spray power 30～50Kw, argon flow amount 35～50l/min, hydrogen flowing quantity
5～9l/min, powder feeding rate 30～65g/min, spray distance 100～140mm；
In HVAF technique: kerosene oil flow 22～30l/h, oxygen flow 800～1000l/h, powder feeding rate
45～80g/min, spray distance 350～400mm.
8. the preparation method of NEW TYPE OF COMPOSITE hot spray powder as claimed in claim 7, it is characterised in that
The thickness of prepared composite coating is 0.1～1mm, and microhardness scope is Hv0.3500～Hv0.31100, bond strength
Scope is 30～85MPa.
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| CN106399900A (en) * | 2016-11-18 | 2017-02-15 | 无锡明盛纺织机械有限公司 | Method for spraying aluminum alloy with Si-Cr-B-W-Al wear-resisting coating through high velocity oxy fuel |
| CN106825592A (en) * | 2016-12-22 | 2017-06-13 | 广州市尤特新材料有限公司 | A kind of preparation method of the alloy powder for cold spraying |
| CN109112436A (en) * | 2018-10-10 | 2019-01-01 | 北京科技大学 | A kind of method of in-situ preparation fiber reinforcement high temperature alloy composite material |
| US20200208242A1 (en) * | 2018-12-28 | 2020-07-02 | Industrial Technology Research Institute | Multicomponent alloy coating |
| CN115011843A (en) * | 2022-04-15 | 2022-09-06 | 钢铁研究总院有限公司 | In-situ authigenic carbide reinforced Ni3 Al-based alloy powder and laser cladding method and application thereof |
| CN115401195A (en) * | 2022-09-13 | 2022-11-29 | 中国化学工程第十一建设有限公司 | Particle-reinforced high-entropy alloy powder and preparation method and application thereof |
| CN115537683A (en) * | 2021-06-30 | 2022-12-30 | 叶均蔚 | High-strength corrosion-resistant iron-chromium alloy block and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106399900A (en) * | 2016-11-18 | 2017-02-15 | 无锡明盛纺织机械有限公司 | Method for spraying aluminum alloy with Si-Cr-B-W-Al wear-resisting coating through high velocity oxy fuel |
| CN106825592A (en) * | 2016-12-22 | 2017-06-13 | 广州市尤特新材料有限公司 | A kind of preparation method of the alloy powder for cold spraying |
| CN109112436A (en) * | 2018-10-10 | 2019-01-01 | 北京科技大学 | A kind of method of in-situ preparation fiber reinforcement high temperature alloy composite material |
| US20200208242A1 (en) * | 2018-12-28 | 2020-07-02 | Industrial Technology Research Institute | Multicomponent alloy coating |
| US11624104B2 (en) * | 2018-12-28 | 2023-04-11 | Industrial Technology Research Institute | Multicomponent alloy coating |
| CN115537683A (en) * | 2021-06-30 | 2022-12-30 | 叶均蔚 | High-strength corrosion-resistant iron-chromium alloy block and application thereof |
| CN115537683B (en) * | 2021-06-30 | 2024-03-12 | 叶均蔚 | High-strength corrosion-resistant ferrochrome block and application thereof |
| CN115011843A (en) * | 2022-04-15 | 2022-09-06 | 钢铁研究总院有限公司 | In-situ authigenic carbide reinforced Ni3 Al-based alloy powder and laser cladding method and application thereof |
| CN115401195A (en) * | 2022-09-13 | 2022-11-29 | 中国化学工程第十一建设有限公司 | Particle-reinforced high-entropy alloy powder and preparation method and application thereof |
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