CN102990058B - Oxide particle reinforced laser-clad high abrasion resistance cobalt-base alloy powder and preparation method thereof - Google Patents
Oxide particle reinforced laser-clad high abrasion resistance cobalt-base alloy powder and preparation method thereof Download PDFInfo
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- CN102990058B CN102990058B CN201210548345.1A CN201210548345A CN102990058B CN 102990058 B CN102990058 B CN 102990058B CN 201210548345 A CN201210548345 A CN 201210548345A CN 102990058 B CN102990058 B CN 102990058B
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Abstract
The invention provides oxide particle reinforced laser-clad high abrasion resistance cobalt-base alloy powder and a preparation method thereof. The powder is characterized by comprising matrix alloy powder, oxide particles and binders; and combined powder is prepared from 50-98% of matrix alloy powder, 1-45% of one of or combined mixture powder of more than two of Al2O3 or Cr3C2 and ZrO2 and 1-5% of binders. The preparation method comprises the steps of matrix alloy powder preparation, oxide particle addition, binder addition, stirring and ball milling, combined powder preparation, drying, grinding and screening. The combined powder prepared from 1-45% of one of or combined mixture powder of more than two of Al2O3 or Cr3C2 and ZrO2 and 1-5% of binders has higher hardness and toughness and excellent abrasion resistance and corrosion resistance, is especially suitable for laser cladding of high impact and high abrasion resistance parts, and can effectively prevent segregation caused by great difference of specific weights of the components in the storage, transport and use processes.
Description
Technical field
The invention belongs to cobalt-base alloys technical field, relate to the preparation method that a kind of oxide particle strengthens cladding alloy powder, particularly oxide particle strengthens a preparation method for laser melting coating high abrasion Co-based alloy powder, and this high abrasion oxide particle strengthens Co-based alloy powder and is applicable to laser melting coating high abrasion operating mode parts.
Background technology
In modern daily life and industrial production, the attrition and attack of metal material there will be in every field, one of two large major ways that destroy component of machine, engineering component, corrosion will cause a large amount of consumption of machine components, and wearing and tearing are to cause one of major reason of machine components inefficacy.They,, in a large amount of metal materials of loss, have also wasted ample resources, occupy very large proportion in economic loss.
The inefficacy of the engineering component that high temperature, burn into friction and wear cause occurs in surface mostly, and this phenomenon is impelled the very big concern of material science worker to material surface, and impels the fast development of material surface modifying technology.People wish when material monolithic keeps enough toughness and intensity, make material surface obtain higher, specific serviceability, as wear-resisting, anti-corrosion and anti-oxidant etc.
It is reported, at present, in whole world industrialized country, the energy consuming in wearing and tearing accounts for 1/2nd of gross energy, approximately has 60%～80% component of machine because wearing and tearing were lost efficacy.A highly developed industrialized country, the economic loss causing because of wearing and tearing every year almost accounts for 1%～2% of total value of production in national economy.For example, the economic loss that the U.S. causes due to wearing and tearing is every year on average up to 20,000,000,000 dollars; The economic loss that Britain is caused by wearing and tearing every year on average exceedes 51,500 ten thousand pounds.In China, the economic loss being caused by wearing and tearing is equally also quite serious.Only according to department's rough Statistics such as oil, chemical industry, coal, electric power, agricultural machinery, just there is steel consumption up to millions of tons in China every year in wearing and tearing, and economic loss reaches 200～30,000,000,000 yuan more than.Thus, the effect of attrition of metal material performance quality and the service life of machine components, and then affects the competitiveness of these machine components on market.
Meanwhile, metal erosion problem also spreads all over national economy every field, from the industrial and agricultural production that is applied to of most advanced branches of science technology, and the manufacture that is applied to national defense industry from daily life, the place of every use metal material, all exists etching problem in varying degrees.According to relevant expert's statistics, each point, whole world half just has one ton of steel to be etched into iron rust.For example, 1975, the economic loss that the U.S. is caused by corrosion every year, up to 82,000,000,000 dollars, accounted for 4.9% of total value of production in national economy; Nineteen ninety-five, the economic loss straight line that the U.S. causes due to corrosion rises to 3,000 hundred million dollars.Statistics shows, in a country that industry is flourishing, the economic loss causing because of corrosion accounts for 2%～4% of total value of production in national economy, exceedes the summation of the loss that all natural calamities such as floods, fire, earthquake and ancient measure of length, equal to 8 cun wind cause.Although China is only a developing country, because the loss that corrosion brings is also considerable, annual about 5,000 hundred million yuans, account for 6% left and right of Chinese national economy total output value.The economic loss only being caused by corrosion every year in oil and gas field is with regard to approximately 10,000,000,000 yuan, and the fund waste that coal industry is caused by corrosion is every year about 55.6 hundred million yuan, nearly 1,700,000,000 yuan of the annual corrosion loss of power system.
Therefore, from limited natural resources and energy resources, modern demand of industrial production component of machine has enough wear and corrosion behaviors, can extremely under rugged environment, work long hours at high temperature, high load capacity etc., and the attrition and attack problem that therefore solves metal is extremely urgent.
Laser melting coating ceramic technology can combine obdurability high metal, good manufacturability and wear-resisting, anti-corrosion, the high temperature resistant and anti-oxidation characteristics of ceramic material excellence, for the surface strengthening technology of most worthy and competitiveness, it is also one of focus of laser melting and coating technique development.
Laser melting coating is the technology of emerging a, fast development, it is under high-energy-density laser beam irradiation, matrix surface skim melts with the alloy adding as required simultaneously, forming thickness is 10～1000 μ m surface melting layers, the process that rapid solidification requires to meet a certain property, be a new technology of the multidisciplinary intersection such as material reciprocation and rapid solidification moulding in set laser heat fused, molten bath, this technology obtains more careful research aspect surface treatment.
Because local surfaces is subject to heat density large, spot diameter is little, and heated time is short, therefore fusion zone is very little on surface of the work, passes to inside workpiece heat few, has very large thermograde in fusion zone, and cooling velocity can reach 10
4～10
9dEG C/s.Just because of rapid solidification, give the feature that alloy is different from normal freezing.As the laser melting coating of one of surface modification means, be suitable for top layer modification and the reparation of each metalloid.Cladding laser surfaces can keep former coating alloy composition (dilution rate 5～8%), only has very limited phase diffusion zone at the intersection of reflow zone and matrix, and that this diffusion region is realized the metallurgical binding of coat and matrix is just necessary.It is upper that it can be coated in common material (workpiece) high performance alloy powder, thereby obtain the face coat (as good coatings such as heat-resisting, anti-corrosion, wear-resisting, shock resistances) of excellent specific property.
Compared with traditional surface modification (thermal spraying, plasma spraying etc.) technology, it mainly contains following advantage: interface is metallurgical binding; Organize superfine; Cladding layer composition is even and dilution factor is low; Coating thickness is controlled; Heat distortion is little; Easily realize constituency cladding and technical process and easily realize automation.In process for modifying surface, laser melting coating has become more active research field.
Laser surface coating technology is one of the advanced subject in the material surface engineering field that grows up of middle nineteen seventies, both at home and abroad just flourish.Along with the development and perfection of superpower laser and supporting technology, it progressively moves towards commercial Application from laboratory research, will have powerful vitality in following material surface modifying field.Laser melting coating both can be used for the surface modification of traditional material, promoted the performance of material, can be used for again the reparation of surface failure part, therefore available matrix material is very extensive, as carbon steel, steel alloy, cast iron and aluminium alloy, copper alloy, nickel base superalloy etc.In addition, material scientific research personnel has also developed amorphous state and quasi crystal coating etc.At present, more at the study on the modification on traditional material surface to laser technology both at home and abroad, the research of high-alloy steel, high-temperature alloy surface modification also has report, but the practical engineering application that application laser melting coating is repaired some components of machine but awaits further popularization, main cause is in laser cladding process, often to have the problems such as crackle, coating be inhomogeneous, awaits the further research of scientific worker.
That the state of laser melting coating layer material generally has is Powdered, thread, paste etc.In addition also can be using sheet metal, sintered metal product, steel band and welding rod etc. as cladding material, wherein alloy powder is most widely used in laser melting and coating technique.
Depending on the practical service environment condition difference of workpiece, also different to the performance requirement of surface coating.Cladding alloy system mainly contains ferrous alloy, nickel-base alloy, cobalt-base alloy and complex alloy powder etc.It is local wear-resisting and hold yielding part that iron(-)base powder is suitable for requirement; Nickel-base alloy is suitable for that requirement part is wear-resisting, the member of heat and corrosion resistant and thermal fatigue resistance, and required laser power density is slightly higher than cladding ferrous alloy; Cobalt-base alloy coating is suitable for the part of wear-resisting, the anti-corrosion and thermal fatigue resistance of requirement; Ceramic coating at high temperature has higher intensity, and Heat stability is good, and chemical stability is high, is applicable to the part of wear-resisting, anti-corrosion, high temperature resistant and non-oxidizability.
Wear-resistant coating is in laser melting coating ceramic coating, to study to such an extent that be also maximum a kind the earliest.Although Ni base, Co base, Fe base self-fluxing alloy itself just have good wear-resisting, anti-corrosion, heat resistance, utilize their laser cladding layer carry out material surface strengthening research report oneself through a lot.But under the serious condition of slip, impact wear and abrasive wear, simple Ni base, Co base, the not competent instructions for use of Fe base self-melting alloy.
Composite is a kind of novel surface peening engineering material, metal and metal, metal and pottery, pottery and pottery etc., and the range of choice of the collocation between alloy powder and between alloy powder and pottery is very extensive.Recent domestic has been carried out the various dystectic carbide, nitride, boride and the ceramic oxide particle that in the alloy powder system of above-mentioned laser melting coating, add certain content for this reason, make the even pure ceramic coating of cermet composite coating, to improve the wearability of cladding layer.
Can prepare high performance composite coating although adopt composite to carry out laser melting coating, but at present domestic most still research in laboratory, and its preparation technology adopts nickel-based self-fluxing alloy to mix with the WC powder of certain content in laboratory, then add saturated turpentine oil or homemade organic binder bond, furnishing slip or paste, precoating is overlying on workpiece, then carries out laser melting coating or sintering.Its hard particles adding is large, density is different from parent metal, and the distribution of particle in cladding layer is often inhomogeneous, conventionally presents gradient and distributes; Wetability, stability, the coefficient of expansion and the chemical reactivities etc. of added granular materials and matrix all cause the inhomogeneities of the microstructure and property of cladding layer.And prepared combination powder is because each constituent element proportion differs greatly, thereby in storage, transport and use procedure and easily produce segregation.Cannot carry out commercialization supply, on market, there is not yet at present particle and strengthen the merchandise sales of laser melting coating special powder.For above-mentioned reasons, there is not yet so far laser melting coating special combination powder, thereby restricted the application of laser melting coating on high abrasion operating mode field.
Summary of the invention
The object of the invention is to avoid above-mentioned deficiency of the prior art, develop a kind of preparation method that can meet a kind of oxide particle enhancing laser melting coating high abrasion Co-based alloy powder required under the serious abrasive wear working condition of engineering machinery.
For achieving the above object, the present invention can and add hard compounds and realize with corresponding technology of preparing scheme by the design of following basic chemical composition:
A kind of oxide particle provided by the present invention strengthens laser melting coating high abrasion Co-based alloy powder and is made up of matrix alloy powder and oxide enhancing particle and binding agent, and its proportioning is: 50～98% matrix alloy powder, 1～45% Al
2o
3or Cr
3c
2, ZrO
2the combined hybrid body powder that one of them or two kinds are above, 1～5% binding agent is prepared into combination powder; Wherein the chemical composition of matrix alloy and mass percent thereof are;
0.1～0.4%C, 3.5～5.5%Si, 1.5～3%B, 1.6～2.5%Mn, 1.0～3.0%Cr, 0.5～2%W, 2.0～3.0%Mo, 0.5～3%Ni, 0.1～0.4%Nb, < 15%Fe, 0.1～1.2%MgO, 0.2～2%CaF
2, CeO
2, Y
3o
2, La
2o
3above combination≤0.9% of one of them or two kinds, Co surplus and inevitably impurity elements.
Oxide particle provided by the present invention strengthens the preparation method of laser melting coating high abrasion Co-based alloy powder, and its step of preparation process is:
Matrix alloy powder preparation → interpolation oxide particle → interpolation binding agent → stirring ball-milling → combination powder → dry → broken → screening; Concrete technology step is as follows:
(1) matrix alloy preparation
The technological process of matrix alloy powder preparation is: batching → melting → atomization → dry → screening;
Batching: raw material is pure cobalt, graphite powder, FeCr, FeB, FeSi, W, Nb, Ni, La
2o, Y;
Melting: the above-mentioned raw material preparing is carried out to melting in vaccum sensitive stove or intermediate frequency furnace, and fusion temperature is 1250 DEG C-1350 DEG C, controls carbon content and reaches requirement, after stokehold adjusting component is qualified, and 1200～1280 DEG C of tapping temperatures;
Atomization: adopt indifferent gas or hydraulic atomized, atomization aperture 5～10mm, atomizing pressure, 10～14MPa;
Dry: device therefor is coated infrared drier, and bake out temperature is 220 DEG C～280 DEG C;
Screening: sift out particle size range for+150 orders～-350 object powder is as finished powder by sieving machine;
(2) add oxide particle
Choose particle size range for the commercially available Al of+150 orders～-350 object
2o
3or Cr
3c
2, ZrO
2one of them or two kinds of above combined hybrid body powder are as strengthening hard particles;
(3) add binding agent
Adopt phenolic resins, epoxy resin or the waterglass of heat curing-type to make binding agent, add cyclohexanone or methanol solvate, make it be dissolved into resin solution;
(4) stirring ball-milling
By the matrix alloy powder and the Al that prepare
2o
3or Cr
3c
2, ZrO
2after the combined hybrid body powder that one of them or two kinds are above and binding agent are configured according to required ratio, pour in agitating ball mill, make it be dissolved into resin solution in cyclohexanone or methanol solvate the resin dissolves of required dosage; After stirring, pour in the mixed powder of required processing in ball mill, after being prepared according to 2: 1～3: 1 ratios of grinding media to material, the abrading-ball of sphere diameter 10～20mm joins in agitating ball mill, starting agitating ball mill, through the abundant stirring ball-milling of 5～60 hours, the each component of mixed powder and resin liquid are all evenly distributed, each constituent element powder particle is wrapped up, and be bonded together, be prepared into combination powder;
(5) dry
Combination powder good ball milling is poured out from ball mill, then dry through 150 DEG C～200 DEG C;
(6) broken and screening
Dried combination powder is carried out to fragmentation, sift out particle size range for+150 orders～-350 object powder is respectively as finished powder by sieving machine, obtain required composition, desired particle size grade and don't the combination powder of solute segregation can occur.
Beneficial effect
Compared with prior art, tool of the present invention has the following advantages:
1) oxide particle of the present invention strengthens the existing higher toughness of laser melting coating high abrasion Co-based alloy powder, high hardness, have again excellent wearability and corrosion resistance, its abrasive wear resistance can be 10 times of rich chromium cast iron, and its corrosion resistance and 1Cr18Ni9Ti are suitable.Be applicable to laser melting coating HI high impact, high abrasion operating mode parts.
2) oxide particle enhancing laser melting coating high abrasion Co-based alloy powder of the present invention has excellent laser melting and coating process performance, and laser cladding layer after treatment has the advantages such as flawless, pore-free, free from admixture, dense structure, grain refinement.
3) oxide particle of preparing through technique of the present invention strengthens laser melting coating high abrasion Co-based alloy powder and each constituent element powder particle can be wrapped up, and is bonded together; There is enough adhesion strengths, can effectively prevent that composition powder from producing segregation because each constituent element proportion differs greatly in storage, transport and use procedure.
4) oxide particle of the present invention strengthens laser melting coating high abrasion Co-based alloy powder, be specially adapted to the laser melting coating reparation of the alloy workpiece of high surfaces hardness, toughness and high-wearing feature, gained cladding alloy powder technology performance is good, under the condition without preheating and subsequent heat treatment, can obtain the flawless Laser Clad Alloy Coatings of the large thickness of large area, cladding layer intensity, hardness and wearability are high, plasticity and toughness are good, and significantly reduce with alloy powder cost than existing most of self-fluxing alloy powders used for hot spraying and existing most of laser melting coating.Can reduce the consumption of strategic rare element, significantly reduce laser melting coating cost.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described.
Embodiment mono-
A kind of laser melting coating high abrasion oxide particle strengthens the preparation method of laser melting coating high abrasion Co-based alloy powder, this oxide particle strengthens laser melting coating high abrasion Co-based alloy powder and is made up of matrix alloy powder and oxide hard particle and binding agent, its proportioning is: 60% matrix alloy powder, 37% Al
2o
3, 3% phenolic resin adhesive is prepared into combination powder; Wherein the chemical composition of matrix alloy and mass percent thereof are;
0.3%C, 4%Si, 2.5%B, 2.6%Cr, 1.5%W, 2.2%Mn, 0.3%Nb, 2.5%Ni, 13%Fe, 0.1%MgO, 0.5%CaF
2, 0.2%CeO
2, 0.2%Y
3o
2, 0.2%La
2o
3, Co surplus.
Its manufacturing technology steps:
Matrix alloy powder preparation → interpolation oxide particle → interpolation binding agent → stirring ball-milling → combination powder → dry → broken → screening; Concrete technology step is as follows:
(1) matrix alloy preparation
The technological process of matrix alloy powder preparation is: batching → melting → atomization → dry → screening;
Batching: raw material is pure nickel, graphite powder, FeCr, FeB, FeSi, Cu, Sn, Rare Earth Y, Rare-Earth Ce; By above-mentioned percentage by weight proportioning, be ready to make the raw material of parent metal powder.
Melting: start vacuum induction intermediate frequency furnace, by the requirement of smelting technology, put into metal and start melting, the metal of general easy oxidation was put in the later stage of fusing.Fusion temperature is approximately controlled at 1250-1300 DEG C; When the metal of this stove all after fusing, carries out slag making in stove, remove the impurity in molten metal, then enter refining period and carry out refining, before cast, add deoxidier to carry out deoxidation, control carbon content and reach requirement, after stokehold adjusting component is qualified, tapping temperature is controlled at 1200～1250 DEG C.
Atomization: alloy liquid qualified melting is poured in cone bottom pour ladle, start to carry out the atomization of metal dust, open high-pressure inert gas, using the gases at high pressure from gas cylinder as air knife, to becoming the molten metal bath stream of a thread to cut atomization after the constraint of leting slip a remark that is 5～10mm through aperture after fusing, atomizing pressure 10～14MPa, by molten drop small metal atomization poling, final set becomes alloy powder.Metal dust after solidifying, still quite easily oxidation in the time of high temperature, so must allow its cool to room temperature under the environment of anaerobic or hypoxemia, could reduce the oxygen content of powder.Normal nebulisation time is about 5～20 minutes.
Dry: device therefor is coated infrared drier, approximately 250 DEG C of bake out temperatures, dried metal dust, the chemical examination of chemical analysis is carried out in first sampling, proceeds to next procedure after qualified.
Screening: sift out particle size range for+150 orders～-350 object powder is as finished powder by sieving machine.
(2) add oxide particle
Choose particle size range for the commercially available Al of-250 object
2o
3powder is as strengthening particle;
(3) add binding agent
Adopt the phenolic resins of heat curing-type to make binding agent, add cyclohexanone solvent, make it be dissolved into resin solution;
(4) stirring ball-milling
By the matrix alloy powder and the Al that prepare
2o
3after powder and binding agent are configured according to above-mentioned ratio, pour in agitating ball mill, the phenolic resins of 3% heat curing-type is dissolved in cyclohexanone solvent and makes it be dissolved into resin solution, after stirring, pour in the mixed powder of the required processing in ball mill, after being prepared according to 2: 1 ratios of grinding media to material, the abrading-ball of sphere diameter 15mm joins in agitating ball mill, through the abundant stirring ball-milling of 35 hours, the each component of mixed powder and resin liquid are all evenly distributed, each constituent element powder particle is wrapped up, and be bonded together, be prepared into combination powder;
(5) dry
Combination powder good ball milling is poured out from ball mill, then dry through 180 DEG C;
(6) broken and screening
Dried combination powder is carried out to fragmentation, sift out particle size range for+150 orders～-350 object powder is as finished powder by sieving machine, obtain required composition, desired particle size grade and don't the combination powder of solute segregation can occur.
Sieve packaging warehouse-in by user's requirement.
Embodiment bis-
A kind of laser melting coating high abrasion oxide particle strengthens the preparation method of laser melting coating high abrasion Co-based alloy powder, this oxide particle strengthens laser melting coating high abrasion Co-based alloy powder and is made up of matrix alloy powder and oxide particle and binding agent, its proportioning is: 68% matrix alloy powder, 30% ZrO
2, 2% epoxy adhesive is prepared into combination powder; Wherein the chemical composition of matrix alloy and mass percent thereof are;
0.2%C, 5%Si, 3%B, 1.5%Cr, 2.0%W, 2.5%Mn, 0.2%Nb, 3%Ni, 12%Fe, 0.15%MgO, 0.9%CaF
2, 0.25%CeO
2, 0.25%Y
3o
2, 0.25%La
2o
3, Co surplus.
(2) add carbide particle
Choose particle size range for the commercially available ZrO of-300 object
2powder is as strengthening hard particles;
(3) add binding agent
Adopt the epoxy resin of heat curing-type to make binding agent, add methanol solvate, make it be dissolved into resin solution;
(4) stirring ball-milling
By the matrix alloy powder and the ZrO that prepare
2after powder and binding agent are configured according to above-mentioned ratio, pour in agitating ball mill, the phenolic resins of 2% heat curing-type is dissolved in methanol solvate and makes it be dissolved into resin solution, after stirring, pour in the mixed powder of the required processing in ball mill, after being prepared according to 2.5: 1 ratios of grinding media to material, the abrading-ball of sphere diameter 12mm joins in agitating ball mill, through the abundant stirring ball-milling of 5～60 hours, through the abundant stirring ball-milling of 26 hours, the each component of mixed powder and resin liquid are all evenly distributed, each constituent element powder particle is wrapped up, and be bonded together, be prepared into combination powder,
Its preparation method is identical with embodiment mono-.
Embodiment tri-
A kind of laser melting coating high abrasion oxide particle strengthens laser melting coating high abrasion Co-based alloy powder and preparation method thereof, this laser melting coating high abrasion oxide particle strengthens laser melting coating high abrasion Co-based alloy powder and is made up of matrix alloy powder and oxide hard particle and binding agent, its proportioning is: 68% matrix alloy powder, 30% Al
2o
3and ZrO
2form mixture powder do, 2% epoxy adhesive is prepared into combination powder; Wherein the chemical composition of matrix alloy and mass percent thereof are;
0.4%C, 2.8%Si, 2.0%B, 3%Cr, 2.5%W, 1.8%Mn, 0.25%Nb, 2.0%Ni, 10%Fe, 0.2%MgO, 1.5%CaF
2, 0.3%CeO
2, 0.3%Y
3o
2, 0.3%La
2o
3, Co surplus.
(2) add oxide particle
Choose particle size range for the commercially available 50%Al of-200 object
2o
3and 50%ZrO
2composition mixture powder is as strengthening hard particles;
(3) add binding agent
Adopt waterglass to make binding agent, add methanol solvate;
(4) stirring ball-milling
By the matrix alloy powder and the Al that prepare
2o
3and ZrO
2after the mixture powder of composition and binding agent are configured according to above-mentioned ratio, pour in agitating ball mill, 2.5% waterglass is incorporated in methanol solvate, after stirring, pour in the mixed powder of the required processing in ball mill, after being prepared according to 2.8: 1 ratios of grinding media to material, the abrading-ball of sphere diameter 18mm joins in agitating ball mill, starting agitating ball mill, through the abundant stirring ball-milling of 18 hours, the each component of mixed powder and waterglass liquid are all evenly distributed, each constituent element powder particle is wrapped up, and be bonded together, be prepared into combination powder;
Its preparation method is identical with embodiment mono-.
The laser melting coating high abrasion oxide particle of the above composition that the present invention proposes strengthens laser melting coating high abrasion Co-based alloy powder, be specially adapted to the laser melting coating on corresponding product surface, the hardness of its cladding layer is high, wearability is good, the tendency that produces cracking and other overlay defect is little, can prepare large thickness cladding layer, and laser melting and coating process is functional, use the cost of cladding alloy powder low than now, can be suitable for application widely needs.Material of the present invention is applied has significant economic and social benefit.
Claims (1)
1. the preparation method of an oxide particle enhancing laser melting coating high abrasion Co-based alloy powder, it is characterized in that: oxide particle strengthens laser melting coating high abrasion Co-based alloy powder and is made up of matrix alloy powder and oxide enhancing particle and binding agent, its proportioning is: 50～98% matrix alloy powder, 1～45% Al
2o
3or Cr
3c
2, ZrO
2the combined hybrid body powder that one of them or two kinds are above, 1～5% binding agent is prepared into combination powder; Wherein the chemical composition of matrix alloy and mass percent thereof are;
0.1～0.4%C, 3.5～5.5%Si, 1.5～3%B, 1.6～2.5%Mn, 1.0～3.0%Cr, 0.5～2%W, 2.0～3.0%Mo, 0.5～3%Ni, 0.1～0.4%Nb, < 15%Fe, 0.1～1.2%MgO, 0.2～2%CaF
2, CeO
2, Y
3o
2, La
2o
3above combination≤0.9% of one of them or two kinds, Co surplus and inevitably impurity elements; Its step of preparation process is:
Matrix alloy powder preparation → interpolation oxide particle → interpolation binding agent → stirring ball-milling → combination powder → dry → broken → screening; Concrete technology step is as follows:
(1) matrix alloy preparation
The technological process of matrix alloy powder preparation is: batching → melting → atomization → dry → screening;
Batching: raw material is pure cobalt, graphite powder, FeCr, FeB, FeSi, W, Nb, Ni, La
2o, Y;
Melting: the above-mentioned raw material preparing is carried out to melting in vaccum sensitive stove or intermediate frequency furnace, and fusion temperature is 1250 DEG C-1350 DEG C, controls carbon content and reaches requirement, after stokehold adjusting component is qualified, and 1200～1280 DEG C of tapping temperatures;
Atomization: adopt indifferent gas or hydraulic atomized, atomization aperture 5～10mm, atomizing pressure, 10～14MPa;
Dry: device therefor is coated infrared drier, and bake out temperature is 220 DEG C～280 DEG C;
Screening: sift out particle size range for+150 orders～-350 object powder is as finished powder by sieving machine;
(2) add oxide particle
Choose particle size range for the commercially available Al of+150 orders～-350 object
2o
3or Cr
3c
2, ZrO
2one of them or two kinds of above combined hybrid body powder are as strengthening hard particles;
(3) add binding agent
Adopt phenolic resins, epoxy resin or the waterglass of heat curing-type to make binding agent, add cyclohexanone or methanol solvate, make it be dissolved into resin solution;
(4) stirring ball-milling
By the matrix alloy powder and the Al that prepare
2o
3or Cr
3c
2, ZrO
2after the combined hybrid body powder that one of them or two kinds are above and binding agent are configured according to required ratio, pour in agitating ball mill, make it be dissolved into resin solution in cyclohexanone or methanol solvate the resin dissolves of required dosage; After stirring, pour in the mixed powder of required processing in ball mill, after being prepared according to 2: 1～3: 1 ratios of grinding media to material, the abrading-ball of sphere diameter 10～20mm joins in agitating ball mill, starting agitating ball mill, through the abundant stirring ball-milling of 5～60 hours, the each component of mixed powder and resin liquid are all evenly distributed, each constituent element powder particle is wrapped up, and be bonded together, be prepared into combination powder;
(5) dry
Combination powder good ball milling is poured out from ball mill, then dry through 150 DEG C～200 DEG C;
(6) broken and screening
Dried combination powder is carried out to fragmentation, sift out particle size range for+150 orders～-350 object powder is respectively as finished powder by sieving machine, obtain required composition, desired particle size grade and don't the combination powder of solute segregation can occur.
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|---|---|---|---|
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|---|---|---|---|
| CN201210548345.1A CN102990058B (en) | 2012-12-18 | 2012-12-18 | Oxide particle reinforced laser-clad high abrasion resistance cobalt-base alloy powder and preparation method thereof |
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| CN102990058B true CN102990058B (en) | 2014-11-05 |
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| CN103639403B (en) * | 2013-11-20 | 2015-09-30 | 徐立云 | Be exclusively used in the Co-based alloy powder of continuous wave optical-fiber laser cladding |
| CN103611927B (en) * | 2013-11-20 | 2015-12-30 | 柳岸敏 | Be exclusively used in the cobalt-based cermet powder of continuous wave optical-fiber laser cladding |
| CN103624250B (en) * | 2013-11-20 | 2015-09-23 | 柳岸敏 | Be exclusively used in the nickel based metal ceramal powder of continous way optical-fiber laser cladding |
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| CN104831210A (en) * | 2015-05-09 | 2015-08-12 | 安徽鼎恒再制造产业技术研究院有限公司 | Co-ZrO2-HfO2 coating material and preparation method thereof |
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| CN110202133A (en) * | 2019-07-01 | 2019-09-06 | 有研粉末新材料股份有限公司 | A kind of nano aluminum oxide dispersion strengthens the preparation method and application of copper-based composite powder |
| CN112643024B (en) * | 2020-12-15 | 2021-12-10 | 上海海事大学 | Preparation method of cobalt-based alloy powder for protecting ice-breaking belt on polar ice-breaking ship |
| CN113699415B (en) * | 2021-07-29 | 2022-09-16 | 南昌大学 | Corrosion-resistant and high-temperature oxidation-resistant Co-based high-temperature alloy coating and preparation method thereof |
| CN115464155B (en) * | 2022-09-23 | 2024-03-12 | 安徽工业大学 | Cr (chromium) 3 C 2 Particle reinforced laser selective melting cobalt-base alloy and preparation method thereof |
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