CN109055885A - It is a kind of using supersonic spray coating prepare high-carbon high niobium high-chromium wear-resistant erosion alloy coat method and its pre-alloyed powder used - Google Patents
It is a kind of using supersonic spray coating prepare high-carbon high niobium high-chromium wear-resistant erosion alloy coat method and its pre-alloyed powder used Download PDFInfo
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- CN109055885A CN109055885A CN201811148421.3A CN201811148421A CN109055885A CN 109055885 A CN109055885 A CN 109055885A CN 201811148421 A CN201811148421 A CN 201811148421A CN 109055885 A CN109055885 A CN 109055885A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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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
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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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
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling
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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
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The present invention relates to thermal spraying and material surface protection technology fields, more particularly to it is a kind of using supersonic spray coating prepare high-carbon high niobium high-chromium wear-resistant erosion alloy coat method and its pre-alloyed powder used, it is easy to be partially dissolved in matrix when heating remelting to solve common alloy coat prepared by the prior art, and crystal grain is grown up rapidly under high temperature fused state, reduce the resistance to abrasion of coating, and the carbide and carbon content of common coating alloy material are lower, wearability is generally not as good as ceramic coating, therefore the problems such as it is restricted using operating condition, the present invention prepares high-carbon high-alloy amorphous pre-alloyed powder using following technique: weighing raw material and carries out mixing；Sintered carbide ball, forming agent and wet grinding media is added and carries out ball milling under protective atmosphere；It filters and is dried to obtain pre-alloyed powder.The high niobium high-chromium wear-resistant erosion alloy coat of high-carbon is prepared using the method for supersonic spray coating with pre-alloyed powder again, coating has many advantages, such as consistency height, and surface is smooth.
Description
Technical field
The present invention relates to thermal spraying and material surface protection technology fields more particularly to a kind of utilization supersonic spray coating to prepare
The method of the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon and its pre-alloyed powder used.
Background technique
The generally existing serious cavitation erosion in water turbine overflowing component surface and sand erosion problem.Cavitation erosion can make on workpiece surface
It generates fish-scale pit or makes surface in spongy, serious reduction output of hydraulic turbine and efficiency；On the other hand, it is mingled in high-velocity flow
The hard particles such as silt can cause serious erosive wear to water turbine overflowing component.Anti scuffing coating technology is by common
Material surface applies the heterogeneous coating of particular characteristic, to improve intensity, wearability, corrosion resistance and the high temperature resistance of material surface
Deng being the most commonly used surface protection technique of current application.
The key of anti scuffing coating technology is material.According to material difference, abrasion-resistant material can be divided mainly into cermet
Coating, macromolecule material coating and alloy coat.
Metal-cermic coating is made of the metal or alloy Binder Phase of the ceramic phase of high rigidity and high tenacity, and flame is utilized
Powdery or Filamentous raw material are heated to melting or semi-molten state by spraying technology, and will by flame stream itself or high-speed flow
It is ejected into matrix surface, forms the anti abrasive hard coat of anti-cavitation after cooling.However, ceramic coating and stainless steel base are deposited
In thermal expansion coefficient (WC-Co:4.5~6.7, stainless steel 15~20, unit 10-6K-1) and modulus mismatch (WC-Co~
700GPa, stainless steel~200GPa) the problem of, under working condition the whole vibration or deformation of workpiece and the machinery of microcell and
Thermal shock can lead to the cracking of ceramic coating.
Polymeric coating material with polyurethane, composite nylon, epoxy resin, rubber etc. for main material, while using aluminium oxide,
The ceramic particles such as silica, silicon carbide are enhanced.Macromolecule material coating is easy for construction, but the combination of coating and matrix is strong
Spend low, and vulnerable to mechanical damage, the service life is to be improved.
Alloy coat generally uses built-up welding, sprays the modes such as molten or laser melting coating, by alloy soldering to workpiece surface, coating and
Strong metallurgical bonding can be formed between matrix.Mainly there are Fe, Co, Ni, Ti, Mo based alloy, Yi Jitong as coating alloy material
Cross the self-melting alloy etc. that the elements such as addition Si, B obtain.Metal alloy coating is since material and matrix are close, thermal expansion coefficient
Close with elasticity modulus with matrix, metallurgical bonding easy to form, therefore holiday is less, toughness is high, hardness and wearability compared with
It is good, and Master Cost is relatively low.But common alloy coat is easy to be partially dissolved in matrix when heating remelting, and
Crystal grain is grown up rapidly under high temperature fused state, reduces the resistance to abrasion of coating.Further, since the carbon of common coating alloy material
Compound and carbon content are lower, and wearability is generally not as good as ceramic coating, therefore it is restricted using operating condition.But alloy coat material
Material is expected to based on its good metallurgical bonding, high tenacity, thermally matched and good craftsmanship through design of material and technique tune
It is whole to optimize.
Designing a kind of alloy coat with high proportion reinforced phase is the direction solved the problems, such as.The present invention proposes a kind of high niobium
High chromium high carbon alloy, using the strong limited solid solution in conjunction with carbon characteristic and its in matrix and carbide of niobium element, design is in situ
Formation high proportion niobium carbide enhances alloy coating material, while using the corrosion resistance of the chromium of high-content raising alloy substrate and by force
Degree.Currently, the mixing addition ceramic phase in alloy powder, since powder activity is low, interfacial wettability is poor, in thermal spray process
It is difficult to sufficiently spread or realize metallurgical bonding between powder.In addition, conventionally employed melting-aerosolization method prepares carbide enhancing in advance
Alloyed powder is limited by fusion process.The alloy melting temp of high-carbon high-alloy content is high, and molten steel viscosity increases, and when aerosolization is easily stifled
Atomizer is filled in, therefore is difficult the alloy that melting atomization content of niobium is greater than 6.0wt.%.
Patent Office of the People's Republic of China discloses a kind of Fe-based amorphous alloy powder and iron base amorphous alloy coatings on July 4th, 2012
And preparation method thereof application for a patent for invention, application notification number is CN102534435A, and open one kind can obtain amorphous conjunction
The method of the Fe-based amorphous alloy powder and amorphous coating layer of gold plating.It is using amorphous powdered alloy as raw material, using cold spraying
Completely amorphous state coating is made in method.The alloy powder is mainly made of Fe, Cr, Mo, can containing Ni, Co, Mn, Si, Re,
One of elements such as Al, Cu, Nb, Zr, Ti, C, B are a variety of, wherein the atomic percentage content of tri- kinds of elements of Fe, Cr, Mo accounts for
70% or more of alloy.But the invention is sprayed with alloy particle, and further alloying effect is poor after spraying, and wherein
Without containing ingredients such as forming agents, therefore the higher problem of porosity for depositing coating after spray coating, and analytical gap is not easy to disappear
It removes, the original interface of powder is also not easy to eliminate.
Summary of the invention
It is easy to be partially dissolved in matrix when heating remelting to solve common alloy coat prepared by the prior art, and
Crystal grain is grown up rapidly under high temperature fused state, reduces the resistance to abrasion of coating, and the carbide of common coating alloy material and
Carbon content is lower, and wearability is generally not as good as ceramic coating, therefore the problems such as it is restricted using operating condition, and the present invention provides one kind
The method for preparing the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon using supersonic spray coating.
The high niobium high-chromium wear-resistant erosion alloy painting of high-carbon is prepared using supersonic spray coating it is a further object of the present invention to provide a kind of
The high chromium pre-alloyed powder of the high niobium of high-carbon used in the method for layer.
To achieve the above object, the invention adopts the following technical scheme:
A method of the high niobium high-chromium wear-resistant of high-carbon is prepared using supersonic spray coating and loses alloy coat, and the method includes following steps
It is rapid:
1) according to 10~20 parts by weight of niobium metal powders, 6~18 parts by weight of chromium metal powder, 1~2 parts by weight of molybdenum metal powder,
1~2 parts by weight of vanadium metal powder, 1.5~3.5 parts by weight of carbon powder, 0~0.5 parts by weight of boron element powder and iron group member
The mass ratio of plain 54~79 parts by weight carries out ingredient and is uniformly mixed to obtain mixed powder, then by wet type high-energy ball milling and
Spray-drying process obtains the spherical pre-alloyed powder of good fluidity；
2) blasting treatment is carried out to metal matrix material using aluminum oxide sand, exposes metal matrix material surface sufficiently, simultaneously
Improve metal matrix material surface roughness；
3) under the conditions of inert gas shielding, the metal matrix material Jing Guo step 2) blasting treatment is preheated；
4) described in step 3) using the method for supersonic flame spraying using the resulting spherical pre-alloyed powder of step 1) as raw material
Preheated metal matrix material surface coating thickness is the coating of 0.5~1.0mm, cooling to obtain the high niobium high-chromium wear-resistant erosion of high-carbon
Alloy coat.
Due to the strength carbon sequestration of Nb element, make Cr element solid solution in matrix not with Carbide Precipitation, while being formed in situ
There is no mutually solid solutions for the carbide of NbC reinforced phase and chromium, therefore further ensure the Cr content of matrix, it is ensured that material
Corrosion resistance.The carbon sequestration of Nb element also ensures the low carbon content of matrix, be allowed to stainless steel base there is no carbon potential it is poor, drop
Tendency at low coating interface.NbC fusing point is high, can be used as the excessive of particle hinder coating crystal grain and grows up, and with
Vanadium generates cooperative reinforcing effect, greatly improves the obdurability of matrix.Moreover, Nb element in-situ carburization is formed in densification process
The primary carbide of the micro/nano level of small and dispersed, increases substantially the wearability of alloy coat.In addition, having benefited from Nb element and its
Low intersolubility and the low solubility in matrix between his carbide are easy to adjust alloy by the adjusting of Nb constituent content
Elasticity modulus, linear expansion coefficient etc., with obtain with the most matched coating material of substrate material physical characteristic, to improve the combination of coating
Power prolongs the service life.
The pre-alloyed powder of this method preparation is adopted using iron family element, various simple substance element powders and carbon and boron as raw material
Powder is mixed, ground and is crushed with mechanical ball mill, so that powder is generated broken, plastic deformation and mechanical alloying, obtains
To a kind of pre-alloyed powder with amorphous characteristic.The limitation for the fusion process that the prealloy powder of this method production is got rid of, holds
The easily high-carbon high-alloy pre-alloyed powder of preparation high activity.
It, can be fast due to the high activity of the high chromium pre-alloyed powder of the high niobium of high-carbon and during supersonic spray coating
Speed is heated to molten state, and further realizes alloying, without carrying out alloying in stock preparation process, reduces raw material system
Energy consumption during standby, and in coating preparation, the uniformity of each component in coating is can be improved in alloying, and due to ball
Contain organic forming agent in the high chromium pre-alloyed powder of the high niobium of the high-carbon of shape, quick ablation carbonization occurs for forming agent, therefore wherein
Thinner micro/nano level powder becomes molten drop and is sprayed into matrix surface, forms amorphous coating after rapid cooling.It is thusly-formed
Amorphous coating granularity is thinner, i.e., surface smoothness is higher, is less prone to flaw, and due to the high activity of powder and superfine grain
Degree is easier to eliminate powder gap and pre-alloyed powder original interface.
Preferably, ball-milling technology described in step 1) are as follows: sintered carbide ball, forming agent and wet are added into mixed powder
The mass ratio of grinding media, sintered carbide ball and mixed powder is 1:(6~8), the additive amount of forming agent is mixed powder and hard
The gross mass of 4~5wt% of alloying pellet gross mass, mixed powder and sintered carbide ball and wet grinding media volume ratio be 1kg:(6~
8)L。
After being sufficiently mixed each raw material, by micron-sized mixed powder and hard in the ball-milling devices such as high energy ball mill
Alloying pellet, forming agent and wet grinding media sufficiently crushed, is deformed and pre-alloyed, so that original crystalline material is in ball milling mistake
A large amount of defect is introduced in journey, its complete crystalline structure is destroyed and is changed into amorphous structure, to obtain a kind of superfine receive
The mixed uniformly amorphous powder slurry of meter level, the amorphous powder of microscale/nanoscale is under the action of forming agent in mechanical milling process
Particle is agglomerated into, and is changed into the spheric granules with superior fluidity under the mating reaction of surface tension, is saved
The required energy consumption of melting to molten state has been saved, and has largely reduced the difficulty of atomization and avoids blocking spraying nozzle
The case where occur.
Preferably, the sintered carbide ball is WC-Co alloying pellet, forming agent includes paraffin and PEG, and wet grinding media includes
Ethyl alcohol.
Forming agent may make the amorphous powder of microscale/nanoscale to reunite, and on the surface that wet grinding media generates
It is changed into the spheric granules with superior fluidity under the mating reaction of tension, and forming agent additive amount is very few easily causes reunion
Uneven even part is not reunited, and the problem of grain graininess unevenness is caused, and forming agent additive amount excessively then will lead to it greatly
Amount agglomerates into excessive particle, influences product quality and generates waste.And the addition of sintered carbide ball is greatly improved ball milling
Effect and efficiency.
Preferably, in the step 2) blasting treatment aluminum oxide sand used mesh number >=80 mesh.
The too small aluminum oxide sand of mesh number carries out resulting surface damage after sandblasting, and the aluminum oxide sand of suitable mesh number is sprayed
Surface roughness can be improved after sand, and then the effect of subsequent prepares coating can be improved.
Preferably, the step 3) preheating temperature is 80~100 DEG C.
The pre-heat treatment can reduce coating stress caused by metal matrix material thermal expansion, avoid cracking.
Preferably, the design parameter of the step 4) supersonic flame spraying are as follows: 3.5~5.0L/min of kerosene oil flow,
800~1200L/min of oxygen flow, powder feeding rate are 30~100g/min, and spray distance is 250~400mm, and spray angle is
75~90 °.
It is cooled to be cooled to behind temperature≤400 DEG C using nitrogen purging using air-cooled first preferably, step 4) is described.
A kind of high chromium pre-alloyed powder of the high niobium of high-carbon, the high chromium pre-alloyed powder of the high niobium of high-carbon be with ferroalloy powder and
Simple substance element powders are raw material, are mixed, ground and are crushed using mechanical ball mill, and powder is made to generate broken, plastic deformation
And a kind of obtained pre-alloyed powder with amorphous characteristic of mechanical alloying.
Micron-sized ferroalloy powder and simple substance element powders and hard are closed in the ball-milling devices such as high energy ball mill
Gold goal, forming agent and wet grinding media sufficiently crushed, is deformed and pre-alloyed, so that original crystalline material is in mechanical milling process
It is middle to introduce a large amount of defect, it destroys its complete crystalline structure and is changed into amorphous structure, to obtain a kind of superfine nanometer
The mixed uniformly amorphous powder slurry of grade, the amorphous powder of microscale/nanoscale is sent out under the action of forming agent in mechanical milling process
Life agglomerates into particle, and is changed into the spheric granules with superior fluidity under the mating reaction of surface tension, saves
Required energy consumption of the melting to molten state, and largely reduce the difficulty of atomization and avoid blocking spraying nozzle
It happens.
Preferably, including 10~20 parts by weight of niobium, 6~18 weight of chromium in the high chromium pre-alloyed powder of the high niobium of high-carbon
Part, 1~2 parts by weight of molybdenum, 1.5~3.5 parts by weight of 1~2 parts by weight of vanadium and carbon, and the iron family element containing >=54wt%.
Each dvielement cooperation generates good effect, improves the activity of the high chromium pre-alloyed powder of the high niobium of high-carbon and then can be improved
With the performance of the coating of its preparation.
Preferably, the boron containing 0.1~0.5 parts by weight in the high chromium pre-alloyed powder of the high niobium of high-carbon.
Preferably, the iron family element includes iron, and contain at least one of nickel and cobalt.
The beneficial effects of the present invention are:
1) the coating consistency that the present invention obtains is high, and surface is smooth；
2) microscopic particles size is less than 2.0 microns, and hard phase size is less than 1.0 microns, and hardness is up to HRC60 or more；
3) pre-alloyed powder activity is high and close with basic material, can form metallurgical bonding, intensity is up to 150MPa or more.
Specific embodiment
Further clear detailed description explanation is made to the present invention below in conjunction with specific embodiment.Ordinary skill
Personnel will realize the present invention based on these explanations.In addition, the reality of the invention being related in following the description
The embodiment that example is generally only a branch of the invention is applied, instead of all the embodiments.Therefore, based on the implementation in the present invention
Example, those of ordinary skill in the art's every other embodiment obtained without making creative work, is all answered
When belonging to the scope of protection of the invention.
Embodiment 1
Prepare the high chromium pre-alloyed powder of the high niobium of high-carbon:
Ingredient, which is proportionally carried out, as raw material using Fe-Nb and Fe-Cr ferroalloy powder and C element powder is mixed to get mixed powder
Expect, addition sintered carbide ball, forming agent and wet grinding media into mixed powder, the mass ratio of sintered carbide ball and mixed powder is
1:8, the additive amount of forming agent are the 4wt% of mixed powder and sintered carbide ball gross mass, mixed powder and sintered carbide ball
Gross mass and wet grinding media volume ratio are 1kg:6L, are subsequently placed in high energy ball mill and carry out ball under the conditions of nitrogen protection atmosphere
It grinds, filters to isolate powder slurries using 200 mesh screens after ball milling, spray drying is carried out using the inert gas of preheating and is made
Grain, obtains the high chromium pre-alloyed powder of the high niobium of high-carbon after being cooled to room temperature.
Embodiment 2
Prepare the high chromium pre-alloyed powder of the high niobium of high-carbon:
With Fe-Nb, Fe-Mo, Fe-Cr and Fe-B ferroalloy powder and Fe, V, Co and C element powder be raw material proportionally into
Row ingredient is mixed to get mixed powder, and sintered carbide ball, forming agent and wet grinding media, sintered carbide ball are added into mixed powder
Mass ratio with mixed powder is 1:8, and the additive amount of forming agent is the 4wt% of mixed powder and sintered carbide ball gross mass, is mixed
The gross mass and wet grinding media volume ratio for closing powder and sintered carbide ball are 1kg:6L, are subsequently placed in high energy ball mill in nitrogen
Ball milling is carried out under the conditions of protective atmosphere, uses 200 mesh screens to filter to isolate powder slurries after ball milling, using the lazy of preheating
Property gas carry out spray drying granulation, the high chromium pre-alloyed powder of the high niobium of high-carbon is obtained after being cooled to room temperature.
Embodiment 3
Prepare the high chromium pre-alloyed powder of the high niobium of high-carbon:
With Fe-Nb, Fe-Mo, Fe-Cr and Fe-B ferroalloy powder and Fe, V, Ni and C element powder be raw material proportionally into
Row ingredient is mixed to get mixed powder, and sintered carbide ball, forming agent and wet grinding media, sintered carbide ball are added into mixed powder
Mass ratio with mixed powder is 1:6, and the additive amount of forming agent is the 4wt% of mixed powder and sintered carbide ball gross mass, is mixed
The gross mass and wet grinding media volume ratio for closing powder and sintered carbide ball are 1kg:(6~8) L, it is subsequently placed in high energy ball mill
Ball milling is carried out under the conditions of nitrogen protection atmosphere, uses 200 mesh screens to filter to isolate powder slurries after ball milling, using pre-
The inert gas of heat carries out spray drying granulation, and the high chromium pre-alloyed powder of the high niobium of high-carbon is obtained after being cooled to room temperature.
Embodiment 4
Prepare the high chromium pre-alloyed powder of the high niobium of high-carbon:
With Fe-Nb, Fe-Cr and Fe-B ferroalloy powder and Fe, Co, Ni and C element powder are that raw material is proportionally matched
Material is mixed to get mixed powder, is added sintered carbide ball, forming agent and wet grinding media into mixed powder, sintered carbide ball and mixed
The mass ratio for closing powder is 1:8, and the additive amount of forming agent is the 5wt% of mixed powder and sintered carbide ball gross mass, mixed powder
The gross mass and wet grinding media volume ratio of material and sintered carbide ball are 1kg:6L, are subsequently placed in high energy ball mill in nitrogen protection
Ball milling is carried out under atmospheric condition, uses 200 mesh screens to filter to isolate powder slurries after ball milling, using the indifferent gas of preheating
Body carries out spray drying granulation, and the high chromium pre-alloyed powder of the high niobium of high-carbon is obtained after being cooled to room temperature.
Embodiment 5
Prepare the high chromium pre-alloyed powder of the high niobium of high-carbon:
With Fe-Nb, Fe-Mo, Fe-Cr, Fe-W and Fe-B ferroalloy powder and Fe, V, Ni and C element powder be raw material according to
Ratio carries out ingredient and is mixed to get mixed powder, and sintered carbide ball, forming agent and wet grinding media, hard are added into mixed powder
The mass ratio of alloying pellet and mixed powder is 1:8, and the additive amount of forming agent is mixed powder and sintered carbide ball gross mass
The gross mass and wet grinding media volume ratio of 5wt%, mixed powder and sintered carbide ball are 1kg:6L, are subsequently placed at high energy ball mill
In carry out ball milling under the conditions of nitrogen protection atmosphere, filter to isolate powder slurries using 200 mesh screens after ball milling, use
The inert gas of preheating carries out spray drying granulation, and the high chromium pre-alloyed powder of the high niobium of high-carbon is obtained after being cooled to room temperature.
Embodiment 6
Prepare the high chromium pre-alloyed powder of the high niobium of high-carbon:
With Fe-Nb, Fe-Mo, Fe-Cr, Fe-W and Fe-B ferroalloy powder and Fe, V, Ni and C element powder be raw material according to
Ratio carries out ingredient and is mixed to get mixed powder, and sintered carbide ball, forming agent and wet grinding media, hard are added into mixed powder
The mass ratio of alloying pellet and mixed powder is 1:8, and the additive amount of forming agent is mixed powder and sintered carbide ball gross mass
The gross mass and wet grinding media volume ratio of 5wt%, mixed powder and sintered carbide ball are 1kg:8L, are subsequently placed at high energy ball mill
In carry out ball milling under the conditions of nitrogen protection atmosphere, filter to isolate powder slurries using 200 mesh screens after ball milling, use
The inert gas of preheating carries out spray drying granulation, and the high chromium pre-alloyed powder of the high niobium of high-carbon is obtained after being cooled to room temperature.
Wherein, each component content (weight percent) is such as in the high chromium pre-alloyed powder of the high niobium of high-carbon obtained by Examples 1 to 6
Shown in table 1.
Each component content in the high chromium pre-alloyed powder of the high niobium of high-carbon obtained by 1 Examples 1 to 6 of table
| Element | Mo | Cr | V | Nb | C | B | Co | Ni | Fe |
| Embodiment 1 | - | 6.0 | - | 10.0 | 1.5 | - | - | - | Surplus |
| Embodiment 2 | 1.0 | 6.0 | 1.0 | 10.0 | 1.66 | 0.1 | 5 | - | Surplus |
| Embodiment 3 | 1.0 | 12.0 | 1.0 | 15.0 | 2.5 | 0.2 | - | 5 | Surplus |
| Embodiment 4 | - | 12.0 | - | 15.0 | 2.4 | 0.2 | 5 | 5 | Surplus |
| Embodiment 5 | 2.0 | 12.0 | 2.0 | 18.0 | 2.8 | 0.3 | - | 10 | Surplus |
| Embodiment 6 | 2.0 | 18.0 | 2.0 | 18.0 | 3.2 | 0.5 | - | 15 | Surplus |
In addition, the design parameter of ball milling is as shown in table 2 in Examples 1 to 6.
The design parameter of ball milling in 2 Examples 1 to 6 of table
| Number | Binder type | Wet grinding media type | Ball-milling Time (h) |
| Embodiment 1 | Paraffin | Ethyl alcohol | 48 |
| Embodiment 2 | Paraffin | Ethyl alcohol | 48 |
| Embodiment 3 | Paraffin | Ethyl alcohol | 48 |
| Embodiment 4 | PEG | Ethyl alcohol | 60 |
| Embodiment 5 | PEG | Ethyl alcohol | 60 |
| Embodiment 6 | PEG | Ethyl alcohol | 60 |
Embodiment 7
A method of the high niobium high-chromium wear-resistant of high-carbon is prepared using supersonic spray coating and loses alloy coat, and the method includes following steps
It is rapid:
1) using the high chromium pre-alloyed powder of the high niobium of high-carbon obtained by embodiment 1 as raw material, i.e., spherical pre-alloyed powder；
2) blasting treatment is carried out to metal matrix material using the aluminum oxide sand of 80 mesh, reveals metal matrix material surface sufficiently
Out, while metal matrix material surface roughness is improved；
3) under the conditions of inert gas shielding, the metal matrix material Jing Guo step 2) blasting treatment is carried out being preheated to 90 DEG C；
4) described in step 3) using the method for supersonic flame spraying using the resulting spherical pre-alloyed powder of step 1) as raw material
Preheated metal matrix material surface coating thickness is the coating of 0.5mm, using sky after being cooled to 400 DEG C using nitrogen purging
It is cold to obtain the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon.
Embodiment 8
A method of the high niobium high-chromium wear-resistant of high-carbon is prepared using supersonic spray coating and loses alloy coat, and the method includes following steps
It is rapid:
1) using the high chromium pre-alloyed powder of the high niobium of high-carbon obtained by embodiment 2 as raw material, i.e., spherical pre-alloyed powder；
2) blasting treatment is carried out to metal matrix material using the aluminum oxide sand of 80 mesh, reveals metal matrix material surface sufficiently
Out, while metal matrix material surface roughness is improved；
3) under the conditions of inert gas shielding, the metal matrix material Jing Guo step 2) blasting treatment is carried out being preheated to 90 DEG C；
4) described in step 3) using the method for supersonic flame spraying using the resulting spherical pre-alloyed powder of step 1) as raw material
Preheated metal matrix material surface coating thickness is the coating of 1.0mm, using sky after being cooled to 400 DEG C using nitrogen purging
It is cold to obtain the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon.
Embodiment 9
A method of the high niobium high-chromium wear-resistant of high-carbon is prepared using supersonic spray coating and loses alloy coat, and the method includes following steps
It is rapid:
1) using the high chromium pre-alloyed powder of the high niobium of high-carbon obtained by embodiment 3 as raw material, i.e., spherical pre-alloyed powder；
2) blasting treatment is carried out to metal matrix material using the aluminum oxide sand of 80 mesh, reveals metal matrix material surface sufficiently
Out, while metal matrix material surface roughness is improved；
3) under the conditions of inert gas shielding, the metal matrix material Jing Guo step 2) blasting treatment is carried out being preheated to 80 DEG C；
4) described in step 3) using the method for supersonic flame spraying using the resulting spherical pre-alloyed powder of step 1) as raw material
Preheated metal matrix material surface coating thickness is the coating of 1.0mm, using sky after being cooled to 300 DEG C using nitrogen purging
It is cold to obtain the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon.
Embodiment 10
A method of the high niobium high-chromium wear-resistant of high-carbon is prepared using supersonic spray coating and loses alloy coat, and the method includes following steps
It is rapid:
1) using the high chromium pre-alloyed powder of the high niobium of high-carbon obtained by embodiment 4 as raw material, i.e., spherical pre-alloyed powder；
2) blasting treatment is carried out to metal matrix material using the aluminum oxide sand of 80 mesh, reveals metal matrix material surface sufficiently
Out, while metal matrix material surface roughness is improved；
3) under the conditions of inert gas shielding, the metal matrix material Jing Guo step 2) blasting treatment is carried out being preheated to 100 DEG C；
4) described in step 3) using the method for supersonic flame spraying using the resulting spherical pre-alloyed powder of step 1) as raw material
Preheated metal matrix material surface coating thickness is the coating of 1.0mm, using sky after being cooled to 400 DEG C using nitrogen purging
It is cold to obtain the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon.
Embodiment 11
A method of the high niobium high-chromium wear-resistant of high-carbon is prepared using supersonic spray coating and loses alloy coat, and the method includes following steps
It is rapid:
1) using the high chromium pre-alloyed powder of the high niobium of high-carbon obtained by embodiment 5 as raw material, i.e., spherical pre-alloyed powder；
2) blasting treatment is carried out to metal matrix material using the aluminum oxide sand of 80 mesh, reveals metal matrix material surface sufficiently
Out, while metal matrix material surface roughness is improved；
3) under the conditions of inert gas shielding, the metal matrix material Jing Guo step 2) blasting treatment is carried out being preheated to 90 DEG C；
4) described in step 3) using the method for supersonic flame spraying using the resulting spherical pre-alloyed powder of step 1) as raw material
Preheated metal matrix material surface coating thickness is the coating of 1.0mm, using sky after being cooled to 400 DEG C using nitrogen purging
It is cold to obtain the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon.
Embodiment 12
A method of the high niobium high-chromium wear-resistant of high-carbon is prepared using supersonic spray coating and loses alloy coat, and the method includes following steps
It is rapid:
1) using the high chromium pre-alloyed powder of the high niobium of high-carbon obtained by embodiment 6 as raw material, i.e., spherical pre-alloyed powder；
2) blasting treatment is carried out to metal matrix material using the aluminum oxide sand of 80 mesh, reveals metal matrix material surface sufficiently
Out, while metal matrix material surface roughness is improved；
3) under the conditions of inert gas shielding, the metal matrix material Jing Guo step 2) blasting treatment is carried out being preheated to 90 DEG C；
4) described in step 3) using the method for supersonic flame spraying using the resulting spherical pre-alloyed powder of step 1) as raw material
Preheated metal matrix material surface coating thickness is the coating of 1.0mm, using sky after being cooled to 350 DEG C using nitrogen purging
It is cold to obtain the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon.
Wherein, the design parameter of supersonic flame spraying used in embodiment 7~12 is as shown in table 3.
The design parameter of supersonic flame spraying used in 3 embodiment 7~12 of table
The high niobium high-chromium wear-resistant of high-carbon obtained by embodiment 7~12 erosion alloy coat is detected, partial detection is such as
Shown in table 4.
Coating performance obtained by 4 embodiment 7~12 of table
| Number | Consistency % | Porosity type | Vickers hardness (HV) | Bond strength (MPa) | Corrosion potential (mV) |
| Embodiment 7 | > 99.5 | A02 | 760 | 168 | 1024 |
| Embodiment 8 | > 99.5 | A02 | 796 | 159 | 1244 |
| Embodiment 9 | > 99.5 | A02 | 788 | 148 | 1024 |
| Embodiment 10 | > 99.5 | A02 | 752 | 145 | 1297 |
| Embodiment 11 | > 99.5 | A02 | 783 | 142 | 1261 |
| Embodiment 12 | > 99.5 | A02 | 772 | 138 | 1239 |
As apparent from Table 4, the present invention is prepared the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon using supersonic spray coating and has
There is very excellent performance.
Claims (10)
1. a kind of method for preparing the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon using supersonic spray coating, which is characterized in that described
Method the following steps are included:
1) according to 10~20 parts by weight of niobium metal powders, 6~18 parts by weight of chromium metal powder, 1~2 parts by weight of molybdenum metal powder,
1~2 parts by weight of vanadium metal powder, 1.5~3.5 parts by weight of carbon powder, 0~0.5 parts by weight of boron element powder and iron group member
The mass ratio of plain 54~79 parts by weight of powder carries out ingredient and is uniformly mixed to obtain mixed powder, then passes through wet type high-energy ball milling
And spray-drying process, obtain the spherical pre-alloyed powder of good fluidity；
2) blasting treatment is carried out to metal matrix material using aluminum oxide sand, exposes metal matrix material surface sufficiently, simultaneously
Improve metal matrix material surface roughness；
3) under the conditions of inert gas shielding, the metal matrix material Jing Guo step 2) blasting treatment is preheated；
4) described in step 3) using the method for supersonic flame spraying using the resulting spherical pre-alloyed powder of step 1) as raw material
Preheated metal matrix material surface coating thickness is the coating of 0.5~1.0mm, cooling to obtain the high niobium high-chromium wear-resistant erosion of high-carbon
Alloy coat.
2. a kind of side for preparing the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon using supersonic spray coating according to claim 1
Method, which is characterized in that ball-milling technology described in step 1) are as follows: sintered carbide ball, forming agent and wet-milling are added into mixed powder
The mass ratio of medium, sintered carbide ball and mixed powder is 1:(6~8), the additive amount of forming agent is that mixed powder and hard close
The gross mass and wet grinding media volume ratio of 4~5wt% of gold goal gross mass, mixed powder and sintered carbide ball are 1kg:(6~8)
L。
3. a kind of side for preparing the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon using supersonic spray coating according to claim 2
Method, which is characterized in that the sintered carbide ball is WC-Co alloying pellet, and forming agent includes paraffin and PEG, and wet grinding media includes second
Alcohol.
4. a kind of side for preparing the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon using supersonic spray coating according to claim 1
Method, which is characterized in that mesh number >=80 mesh of aluminum oxide sand used in the step 2) blasting treatment.
5. a kind of side for preparing the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon using supersonic spray coating according to claim 1
Method, which is characterized in that the step 3) preheating temperature is 80~100 DEG C.
6. a kind of side for preparing the high niobium high-chromium wear-resistant erosion alloy coat of high-carbon using supersonic spray coating according to claim 1
Method, which is characterized in that the design parameter of the step 4) supersonic flame spraying are as follows: 3.5~5.0L/min of kerosene oil flow, oxygen
800~1200L/min of flow, powder feeding rate be 30~100g/min, spray distance be 250~400mm, spray angle be 75~
90°。
7. a kind of high chromium pre-alloyed powder of the high niobium of high-carbon for claim 1 the method, which is characterized in that the high-carbon is high
The high chromium pre-alloyed powder of niobium is to be mixed, ground using mechanical ball mill using ferroalloy powder and simple substance element powders as raw material
It grinds and broken, powder is made to generate broken, plastic deformation and a kind of obtained pre- conjunction with amorphous characteristic of mechanical alloying
Bronze end.
8. the high chromium pre-alloyed powder of the high niobium of a kind of high-carbon according to claim 7, which is characterized in that the high niobium of high-carbon is high
It include 10~20 parts by weight of niobium, 6~18 parts by weight of chromium, 1~2 parts by weight of molybdenum, 1~2 parts by weight of vanadium and carbon in chromium pre-alloyed powder
1.5~3.5 parts by weight, and the iron family element containing >=54wt%.
9. the high chromium pre-alloyed powder of the high niobium of a kind of high-carbon according to claim 8, which is characterized in that the high niobium of high-carbon is high
Boron containing 0.1~0.5 parts by weight in chromium pre-alloyed powder.
10. the high chromium pre-alloyed powder of the high niobium of a kind of high-carbon according to claim 7, which is characterized in that the iron family element
Including iron, and contain at least one of nickel and cobalt.
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