CN108411299B - A method of FeAlCrNiSiC system high entropy alloy material is prepared using welding and the double heat sources of laser - Google Patents

A method of FeAlCrNiSiC system high entropy alloy material is prepared using welding and the double heat sources of laser Download PDF

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CN108411299B
CN108411299B CN201810318559.7A CN201810318559A CN108411299B CN 108411299 B CN108411299 B CN 108411299B CN 201810318559 A CN201810318559 A CN 201810318559A CN 108411299 B CN108411299 B CN 108411299B
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fealcrnisic
entropy alloy
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CN108411299A (en
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安亚君
朱利
曹皓崴
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Liaoning Technical University
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel

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Abstract

A method of FeAlCrNiSiC system high entropy alloy material is prepared using welding and the double heat sources of laser, belongs to field of material processing.This method are as follows: according to the ratio, chromite powder and aluminium powder are mixed, the raw material powder of 200~400 mesh of granularity is obtained；Waterglass is added dropwise, is suppressed, dries, the preset green compact block after being dried；Heat source is done with argon tungsten-arc welding and carries out cladding, after obtained preliminary clad layer surface applies one layer of laser increasing absorption paint, is carried out the cladding of single track laser coatings, is obtained FeAlCrNiSiC system high entropy alloy material after cooling.This method directly can quickly utilize chromite powder, reduce the energy consumption and pollution that chromite powder generates in refining process.It with short route processing, reduces production cost, promote that product science and technology added value, the advantages such as reduce environmental pollution, provide fundamental basis for chromite green high value applications.It is of great significance to the efficient and high value added utilization of mineral resources.

Description

It is a kind of that FeAlCrNiSiC system high-entropy alloy material is prepared using welding and the double heat sources of laser The method of material
Technical field
The invention belongs to field of material processings, and in particular to a kind of to be prepared using welding and the double heat sources of laser The method of FeAlCrNiSiC system high entropy alloy material.
Background technique
Chromite chemical general formula are as follows: (Si, Fe) O, (Cr, Al, Fe, Ni)2O3, there are Cr2O3、Al2O3、Fe2O3、FeO、 NiO、SiO2The isomorphous replacement of six kinds of basic components, carbon content have it is low-in-high-carbon distinguish, complicated component.Chromite powder master Wanting application field is the fields such as metallurgy industry field, the field of building materials, chemical industry.
High-entropy alloy breaches a kind of design concept of the conventional alloys based on element, and at least five kinds of elements press atomic fraction It is greater than 5% and no more than 35% composition, there is " cocktail " formula element to deploy mechanism, element composition and height in chromite powder Entropy alloying component has higher similitude, as multicomponent, ingredient score are greater than 5%.Polynary high-entropy alloy generally uses quickly Prepared by cooling method, and the present invention uses welding preparation in conjunction with the double heat source melting and coating techniques of laser, with quick heating and fastly Quickly cooling but reacts more fully feature.
It is commonly referred to as TIG weldering when argon tungsten-arc welding, is that tungsten bar is used to add the welding method that argon gas is protected as electrode. Since argon gas is continuously sprayed from the nozzle of welding gun in welding process, and stable argon gas protection is being formed around electric arc Circle, reduces the probability that weldment is contacted with air, to effectively prevent tungsten electrode and molten bath oxidation, and due to argon gas Flowing reduces weld heat-affected zone sensibility in certain degree, and cladding layer it is possible to prevente effectively from cladding layer crackle Problem finally obtains good weld seam.The table that this advantage of argon arc welding grows up exactly is utilized in tungsten argon arc melting and coating technique Face modification technology.
Laser melting and coating technique is irradiated, by fast by adding cladding material in substrate surface using high-energy-density laser beam Fast thawing, extension and solidification constitute one in one layer of the matrix surface cladding material with specific physical, chemistry or mechanical property The new composite material of kind, to make up the high-performance that matrix lacks.Laser melting and coating technique can be obtained in the smallest dilution rate Preferable cladding layer is obtained, and its influence to base material is smaller, and stable chemical bond (smelting can be formed between cladding layer and base material Gold combines), greatly improve the bond strength of cladding layer and base material；Heat, the alloying element of initialization layer fast with cooling velocity It spreads relatively small；The small concentration of heat input and the deformation for being not easy to cause workpiece.Using laser melting and coating technique, can obtain thicker Cladding layer, and can control the ingredient and dilution rate of cladding layer, since heat is more concentrated, keep the deformation of base material smaller, It can be realized constituency cladding under conditions of certain, it is easy to accomplish automation is better than flame spray in economy and quality of cladding layer It applies.
Summary of the invention
The present invention is directed to the composition characteristics of high-entropy alloy, double with laser using welding in conjunction with the composition characteristic of chromite powder Technology of heat source provides a kind of method for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding, the party Method is added aluminium powder, raw material powder is pressed into green compact, is placed on matrix using chromite powder as raw material, using welding and swashs The double heat source melting and coating techniques of light quickly prepare FeAlCrNiSiCi system high entropy alloy material.This method can be directly fast to chromite powder Speed utilizes, and reduces the energy consumption and pollution that chromite powder generates in refining process.It is produced into short route processing, reduction This, promote that product science and technology added value, the advantages such as reduce environmental pollution, provide fundamental basis for chromite green high value applications. It is of great significance to the efficient and high value added utilization of mineral resources.
To reach goal of the invention, the technical solution of the present invention is as follows:
A kind of method that FeAlCrNiSiC system high entropy alloy material is prepared with the double heat sources of laser using welding of the invention, It follows the steps below:
Step 1, raw material powder is prepared
According to the ratio, chromite powder and aluminium powder are mixed, obtains mixed material；Wherein, in mass ratio, chromite powder: aluminium powder =3:1；
By mixed material, roughing, ball milling, screening obtain the raw material powder that granularity is 200~400 mesh；
Step 2, preset green compact block is suppressed
Raw material powder that will be uniformly mixed, is added dropwise waterglass, stops being added dropwise when raw material powder just starts to become tide discoloration, After stirring, it is put into inside ready green compact mold, raw material powder is put down in green compact mold middle berth, is suppressed, is obtained pre- Green compact block is set, after drying in the shade, is dried in drying box, the preset green compact block after being dried；
Step 3, argon tungsten-arc welding cladding
By the preset green compact block after drying, it is placed in surface and goes on the dirty matrix with oxide skin of derusting, with argon tungsten-arc welding It does heat source and carries out cladding, obtain the experiment block with preliminary cladding layer；The welding current of the argon tungsten-arc welding be 170~ 190A, the flow of argon gas are 6~8L/min, and speed of welding is 60~70mm/min；
Step 4, laser melting coating
(1) by the experiment block with preliminary cladding layer after argon tungsten-arc welding cladding, gently abate coating, by preliminary cladding Layer surface polishes, and removal forms coating after preliminary clad layer surface applies one layer of laser increasing absorption paint with a thickness of 0.8~1mm Layer, is then placed on numerically-controlled machine tool rapidly, starts laser machine, carries out the cladding of single track laser coatings；
(2) after laser lights coat, laser machine is closed, cladding coating composite material is obtained；Wherein, laser Melting and coating process are as follows: laser power be 2700~3100W, hot spot be long 10mm, the broadband rectangular light spot of wide 2mm, scanning speed 3~ 7mm/s；
(3) after reaction, cladding coating composite material is cooled to room temperature, obtains FeAlCrNiSiC system high-entropy alloy Material.
In the step 1, the chromite powder is selected former chromite powder, the ingredient contained and each ingredient Mass percent is 24.36%Cr2O3, 14.10%FeO, 18.74%Fe2O3, 20.16%SiO2, 12.32%Al2O3, 5.4% CaO, 2.85%NiO, surplus are inevitable impurity.
In the step 1, the aluminium powder, purity >=99.9wt%, granularity is 200~300 mesh.
In the step 1, the ball-milling technology are as follows: raw material loading ball grinder is placed on ball mill, ball milling 4~ 6h, ball milling speed are 100~200rpm.
In the step 2, the green compact mold is the green compact mold of rectangle chamber；
In the step 2, described paving is paved using hairbrush and the saw blade back side.
In the step 2, the pressing process are as follows: use the hydraulic sample machine of WE-30 hydraulic universal, utilize compression bar By raw material powder compression moulding, presser bar pressure is 80~110kN.
In the step 2, the preset green compact block is tetragonal body, preferably cuboid, having a size of 40mm × 10mm ×4mm。
In the step 2, described dries in the shade the time preferably for 24 hours；The drying uses drying box, and drying temperature is 120~150 DEG C, drying time is 3~5h.
In the step 3, the substrate pretreated specifically: rust dirt and oxide skin by matrix surface are ground using angle Machine mill skin removal carries out mill skin removal using sand paper.
In the step 3, the matrix is 40Cr matrix, one of 20 steel matrix or Q235 steel matrix.
In the step 4 (1), the equipment that preliminary clad layer surface is polished use is preferably angle grinder.
In the step 4 (1), before laser melting coating, one layer of laser is applied in preliminary clad layer surface and increases absorption paint, is had Conducive to the absorption of laser energy, lasing efficiency is improved.The laser, which increases, absorbs paint for SiO2、Al2O3Mixed type self-control applies Agent, wherein in mass ratio, SiO2: Al2O3=(11~3): (3~10).
FeAlCrNiSiC system produced by the present invention high entropy alloy material, the atomic fraction of the element contained and each element It is 88.16% for Fe+C, Al 6.28%, Si 2.52%, Cr 1.36%, Ni 1.68%, FeAlCrNiSiC obtained It is high entropy alloy material 735~776HK of average hardness, the relative wear coefficient with standard high carbon ferro-chrome FeCr55C600 is 1.86。
It should using the FeAlCrNiSiC system high entropy alloy material that chromite powder is prepared as raw material using above-mentioned preparation method It, can by XRD and EDS constituent analysis in conjunction with FeAlCrNiSiC system high entropy alloy material green compact with matrix forms metallurgical interface Know, shows to generate γ-Fe and the BCC structure of FCC configuration by argon arc welding and the double heat source claddings of laser FeAlCrNiSiC solid solution forms the mixing solid solution of FCC+BCC double structure, it was demonstrated that finally obtained cladding layer is FeAlCrNiSiC system high-entropy alloy institutional framework.Cladding layer is consolidated by the FeAlCrNiSiC of γ-Fe and the BCC structure of FCC configuration The object phase composition of solution, alloy element Al, Cr, Ni, Si, C inside green compact are solid-solution in two kinds of solid solution and form multivariate solid solutions, The distortion of lattice of Fe is enhanced, green compact is made to have very high rigidity change.
Compared with prior art, of the invention to be closed using welding with laser double heat sources preparations FeAlCrNiSiC system high entropy The method of golden material, feature and has the beneficial effect that
The principle of the present invention is: being the high energy using argon arc welding in conjunction with argon tungsten-arc welding and the double technology of heat source of laser melting coating The performance of the high-energy-density of weld heat-affected zone sensibility and laser.Green compact to be synthesized is first passed through into argon through specific medium Arc cladding since argon gas is continuously sprayed from the nozzle of welding gun in welding process, and forms stable argon gas around electric arc Guard circle reduces the probability that weldment is contacted with air, to effectively prevent tungsten electrode and molten bath oxidation, and due to argon The flowing of gas reduces weld heat-affected zone sensibility in certain degree, finally obtains good weld seam, and experiment shows benefit It is mainly mutually made of α-Fe, Fe3Si, FeMoSi and Fe3Al2 etc. with Argon arc cladding in cladding layer, cladding layer is with FeMoSi/ Fe3Si is matrix, and primary phase is α-Fe reinforced phase, average hardness 500HV.In order to obtain performance more preferably with tissue more preferably Coat lights reaction further across laser heat source, and the latent heat released during thermit reaction further maintains heat source climing Prolong, finally obtains material requested.By this double heat source combination technology, start laser melting coating after argon arc welding, compared to simple It is substantially reduced and evenly distributed, and is organized the formation of uniformly using laser melting coating stress, energy-saving effect is obvious；Again also, pass through Laser melting and coating technique takes full advantage of the chemical reaction heat of raw material come heat needed for maintaining subsequent reactions, can achieve very high Temperature, it is the effective ways for preparing special high-temperature material that instantaneous temperature, which can achieve 3000-4000 DEG C,.Because by double heat The cladding process speed in source is fast, and temperature is high, reacts more abundant, therefore the sample entropy obtained is bigger.
In raw material powder preparation, chromite powder and aluminium powder are mixed, thermit reaction occurs in experimentation, passes through aluminium Thermal response displaces the elements such as Cr, Fe.C element in chromite powder restores Ni, Si, Al element as high entropy group at high temperature Member, participates in high-entropy alloy cladding synthesis, and the elements such as Cr, Fe therein and C element generate hard carbide, formed in composite material Reinforced phase, have positive contribution for the abrasion resistance and hardness of matrix.Impurity contained in sample after cladding is ore In common impurity element, if P content is about 0.4wt%, S content is about 0.3wt% etc..These impurity elements and its field trash It is not involved in reaction, the diluent of control laser combustion synthesis is can be used as, keeps chemical reaction more abundant.
Above-mentioned laser melting coating reactive chemistry equation is (1)-(8):
Thermit reaction and reduction reaction such as formula (1)-(2) of generation:
2Al+Fe2O3=Al2O3+2Fe+ΔG(1)
2Al+Cr2O3=Al2O3+2Cr+ΔG(2)
At high temperature, it also occur that following displacement reaction:
3C+2Fe2O3=3CO2↑+4Fe(3)
3C+2Cr2O3=3CO2↑+4Cr(4)
C+2FeO=CO2↑+2Fe(5)
C+2NiO=CO2↑+2Ni(6)
3C+2Al2O3=3CO2↑+4Al(7)
C+SiO2=CO2↑+Si(8)
The present invention realizes and quickly prepares FeAlCrNiSiC system high entropy alloy material by chromite powder, and preparation process is first Into process is simple, and powder using efficiency is high.Manufacturing process does not have interface pollution, and enhancing phase size is relatively tiny, is evenly distributed, material The performance of material is improved.The present invention is realized in conjunction with welding and laser melting coating cladding synthetic technology, mineral processing technology, powder The multi-disciplinary cross-application such as last metallurgy, shortens the preparation process flow of high-entropy alloy, reduces its preparation cost, easy to accomplish Large-scale production.Just because of the particularity of cladding method, so that the entropy of high-entropy alloy is higher, the mechanics of high entropy alloy material Performance has obtained significantly improving.
The present invention is combined using single pass argon tungsten-arc welding and single pass laser, realizes the preparation of high entropy alloy material, Without multi-pass laser, both high entropy alloy materials of available high rigidity, high entropy, good mechanical performance.
Detailed description of the invention
Fig. 1 is experiment flow figure of the present invention；
Fig. 2 is the green compact mold structure diagram of invention；
Wherein, 1: former；2: ejection seat；3: compression bar.
Fig. 3 is the microstructure SEM spectrum of FeAlCrNiSiC system high entropy alloy material prepared by the embodiment of the present invention 1, SEM amplification factor is 1100 times.
Fig. 4 is displaing micro tissue topography's figure of FeAlCrNiSiC system high entropy alloy material prepared by the embodiment of the present invention 1.
Fig. 5 is the X-ray diffractogram of FeAlCrNiSiC system high entropy alloy material prepared by the embodiment of the present invention 1.
Fig. 6 is welding and the laser that ferrochrome chromite powder of the present invention quickly prepares FeAlCrNiSiC system high entropy alloy material The picture that cladding is closed, wherein (a) is green compact test specimen；It (b) is green compact argon arc welding process；It (c) is laser melting coating reaction process.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail.
The powder parameter of material in the embodiment of the present invention are as follows: the mass percent of its ingredient contained and each ingredient is 24.36%Cr2O3, 14.10%FeO, 18.74%Fe2O3, 20.16%SiO2, 12.32%Al2O3, 5.4%CaO, 2.85% NiO, surplus are inevitable impurity.
200 mesh of aluminium powder, purity 99.9%.
Present example ball milling is using star-like ball mill.
The argon tungsten-arc welding that the present invention uses carries out tungsten argon arc built-up welding using WS-500 Inversional DC Argon Welder.? In welding process: welding current 170-190A, speed of welding 60-70mm/min and argon flow 6-8L/min.
The laser machine that present example uses carries out the cladding of single track green compact for RofinDC050 type laser machine, and hot spot is The broadband rectangular light spot of long 10mm, wide 2mm, scanning speed 3-7mm/s.
The green compact and mechanics for the FeAlCrNiSiC system high entropy alloy material that chromite powder is quickly prepared in present example Performance test is carried out on WE-30 type hydraulic universal sample machine.
Embodiment 1
A method of FeAlCrNiSiC system high entropy alloy material, experiment stream are prepared using welding and the double heat sources of laser Journey figure is shown in Fig. 1, specifically follows the steps below:
Step 1, raw material powder is prepared
According to the ratio, the aluminium powder that chromite powder and granularity are 200 mesh is mixed, obtains mixed material；Wherein, in mass ratio, Chromite powder: aluminium powder=3:1；
It is then placed in mixed material roughing in ball grinder, is placed in ball milling 4h on ball mill, ball milling speed 100rpm, It is 300 mesh, uniformly mixed raw material powder that screening, which obtains granularity,；
Step 2, preset green compact block is suppressed
Prepare the green compact mold with rectangle type chamber, is made of ejection seat 2, former 1 and compression bar 3, structural schematic diagram See Fig. 2；
By uniformly mixed raw material powder, addition 7 is dripped after glass, and raw material powder just starts to become tide discoloration stopping drop Add, after being stirred, is put into inside the type chamber of ready green compact mold, raw material powder is being pressed with hairbrush and the saw blade back side It is paved in mold tool, using the hydraulic sample machine of WE-30 hydraulic universal, is suppressed, obtained under the pressure of 80kN using compression bar To the preset green compact block of cuboid, after drying in the shade for 24 hours, 150 DEG C of drying 5h, the preset pressure after being dried are warming up in drying box Briquet；
The preset green compact block is cuboid, having a size of 40mm × 10mm × 4mm, relative density 88%.
Step 3, argon tungsten-arc welding cladding
By the preset green compact block after drying, it is placed in and grinds the 40Cr matrix that derusting dirt and oxide skin is gone in mill epidermis face by angle On, heat source is done with argon tungsten-arc welding and carries out cladding, obtains the product with preliminary cladding layer；The welding of the argon tungsten-arc welding Electric current is 170A, and the flow of argon gas is 6L/min, speed of welding 60mm/min, keeps built-up welding speed and welding current intensity steady It is fixed, effectively control the swing of welding gun.
Step 4, laser melting coating
By the product with preliminary cladding layer after argon tungsten-arc welding cladding, gently abate coating will be preliminary with angle grinder Clad layer surface polishes, and removal is formed and applied after preliminary clad layer surface applies one layer of laser increasing absorption paint with a thickness of 0.8mm Then coating is placed on numerically-controlled machine tool rapidly, start RofinDC050 type laser machine, and it is molten to carry out single track laser coatings It covers；
After laser lights coat, laser machine is closed, laser melting coating reaction is brought it about, obtains cladding coating Composite material；Wherein, laser melting and coating process are as follows: laser power 2700W, hot spot are long 10mm, the broadband rectangular light of wide 2mm Spot, scanning speed 3mm/s；
After reaction, cladding coating composite material is cooled to room temperature, obtains FeAlCrNiSiC system high-entropy alloy material Material.
It is SiO that the laser, which increases absorption paint,2、Al2O3Mixed type makes paint by oneself, wherein SiO2With Al2O3Mass ratio is 11:3。
The present embodiment prepares the microstructure SEM spectrum (amplification factor 1100 of FeAlCrNiSiC system high entropy alloy material Times) see that Fig. 3, displaing micro tissue topography's figure are shown in that Fig. 4, X-ray diffractogram are shown in Fig. 5.
The FeAlCrNiSiC system high entropy alloy material average hardness 735HK of acquisition, with standard high carbon ferro-chrome FeCr55C600 Relative wear coefficient be 1.8.
It is matrix that the metallographic structure of the FeAlCrNiSiC system high entropy alloy material of acquisition, which is face-centered cubic crystal, by XRD With EDS constituent analysis it is found that as Fig. 3 diffraction maximum shows to generate by the green compact ingredient of argon arc welding and the double heat source claddings of laser The FeAlCrNiSiC solid solution of γ-Fe and the BCC structure of FCC configuration forms the mixing solid solution of FCC+BCC double structure, Proof green compact is high-entropy alloy institutional framework.
The present embodiment quickly prepares welding and the laser of FeAlCrNiSiC system high entropy alloy material using ferrochrome chromite powder The picture that cladding is closed is shown in Fig. 6, wherein (a) is green compact test specimen；It (b) is green compact argon arc welding process；(c) it is reacted for laser melting coating Process.From figure, it can be seen that carry out what laser melting coating obtained after certain means to the preliminary cladding layer after Argon arc cladding The thickness range of cladding layer is big, and microstructure of surface cladding layer is fine and compact and molten bath increases, and dilution rate is bigger.
Embodiment 2
A method of FeAlCrNiSiC system high entropy alloy material, experiment stream are prepared using welding and the double heat sources of laser Journey figure is shown in Fig. 1, specifically follows the steps below:
Step 1, raw material powder is prepared
According to the ratio, the aluminium powder that chromite powder and granularity are 200 mesh is mixed, obtains mixed material；Wherein, in mass ratio, Chromite powder: aluminium powder=3:1；
It is then placed in mixed material roughing in ball grinder, is placed in ball milling 5h on ball mill, ball milling speed 150rpm, It is 300 mesh, uniformly mixed raw material powder that screening, which obtains granularity,；
Step 2, preset green compact block is suppressed
Prepare the green compact mold with rectangle type chamber, is made of ejection seat 2, former 1 and compression bar 3, structural schematic diagram See Fig. 2；
By uniformly mixed raw material powder, addition 6 is dripped after glass, and raw material powder just starts to become tide discoloration stopping drop Add, after being stirred, is put into inside the type chamber of ready green compact mold, raw material powder is being pressed with hairbrush and the saw blade back side It is paved in mold tool, using the hydraulic sample machine of WE-30 hydraulic universal, is suppressed, obtained under the pressure of 100kN using compression bar To the preset green compact block of cuboid, after drying in the shade for 24 hours, 150 DEG C of drying 3h, the preset pressure after being dried are warming up in drying box Briquet；
The preset green compact block is cuboid, having a size of 40mm × 10mm × 4mm, relative density 88%.
Step 3, argon tungsten-arc welding cladding
By the preset green compact block after drying, it is placed in and grinds the 40Cr matrix that derusting dirt and oxide skin is gone in mill epidermis face by angle On, heat source is done with argon tungsten-arc welding and carries out cladding, obtains the product with preliminary cladding layer；The welding of the argon tungsten-arc welding Electric current is 180A, and the flow of argon gas is 7L/min, speed of welding 70mm/min, keeps built-up welding speed and welding current intensity steady It is fixed, effectively control the swing of welding gun.
Step 4, laser melting coating
By the product with preliminary cladding layer after argon tungsten-arc welding cladding, gently abate coating will be preliminary with angle grinder Clad layer surface polishes, and removal is formed and applied after preliminary clad layer surface applies one layer of laser increasing absorption paint with a thickness of 0.8mm Then coating is placed on numerically-controlled machine tool rapidly, start RofinDC050 type laser machine, and it is molten to carry out single track laser coatings It covers；
After laser lights coat, laser machine is closed, laser melting coating reaction is brought it about, obtains cladding coating Composite material；Wherein, laser melting and coating process are as follows: laser power 2900W, hot spot are long 10mm, the broadband rectangular light of wide 2mm Spot, scanning speed 5mm/s；
After reaction, cladding coating composite material is cooled to room temperature, obtains FeAlCrNiSiC system high-entropy alloy material Material.
The laser, which increases, absorbs paint for SiO2、Al2O3Mixed type makes paint by oneself, wherein SiO2With Al2O3Mass ratio is 11:3。
The FeAlCrNiSiC system high entropy alloy material average hardness 765HK of acquisition, with standard high carbon ferro-chrome FeCr55C600 Relative wear coefficient be 1.86.
Embodiment 3
A method of FeAlCrNiSiC system high entropy alloy material, experiment stream are prepared using welding and the double heat sources of laser Journey figure is shown in Fig. 1, specifically follows the steps below:
Step 1, raw material powder is prepared
According to the ratio, the aluminium powder that chromite powder and granularity are 200 mesh is mixed, obtains mixed material；Wherein, in mass ratio, Chromite powder: aluminium powder=3:1；
It is then placed in mixed material roughing in ball grinder, is placed in ball milling 6h on ball mill, ball milling speed 200rpm, It is 300 mesh, uniformly mixed raw material powder that screening, which obtains granularity,；
Step 2, preset green compact block is suppressed
Prepare the green compact mold with rectangle type chamber, is made of ejection seat 2, former 1 and compression bar 3, structural schematic diagram See Fig. 2；
By uniformly mixed raw material powder, addition 8 is dripped after glass, and raw material powder just starts to become tide discoloration stopping drop Add, after being stirred, is put into inside the type chamber of ready green compact mold, raw material powder is being pressed with hairbrush and the saw blade back side It is paved in mold tool, using the hydraulic sample machine of WE-30 hydraulic universal, is suppressed, obtained under the pressure of 110kN using compression bar To the preset green compact block of cuboid, after drying in the shade for 24 hours, 150 DEG C of drying 4h, the preset pressure after being dried are warming up in drying box Briquet；
The preset green compact block is cuboid, having a size of 40mm × 10mm × 4mm, relative density 88%.
Step 3, argon tungsten-arc welding cladding
By the preset green compact block after drying, it is placed in and grinds the 40Cr matrix that derusting dirt and oxide skin is gone in mill epidermis face by angle On, heat source is done with argon tungsten-arc welding and carries out cladding, obtains the product with preliminary cladding layer；The welding of the argon tungsten-arc welding Electric current is 190A, and the flow of argon gas is 6L/min, speed of welding 70mm/min, keeps built-up welding speed and welding current intensity steady It is fixed, effectively control the swing of welding gun.
Step 4, laser melting coating
By the product with preliminary cladding layer after argon tungsten-arc welding cladding, gently abate coating will be preliminary with angle grinder Clad layer surface polishes, and removal forms coating after preliminary clad layer surface applies one layer of laser increasing absorption paint with a thickness of 1mm Layer, is then placed on numerically-controlled machine tool rapidly, starts RofinDC050 type laser machine, carries out the cladding of single track laser coatings；
After laser lights coat, laser machine is closed, laser melting coating reaction is brought it about, obtains cladding coating Composite material；Wherein, laser melting and coating process are as follows: laser power 3100W, hot spot are long 10mm, the broadband rectangular light of wide 2mm Spot, scanning speed 7mm/s；
After reaction, cladding coating composite material is cooled to room temperature, obtains FeAlCrNiSiC system high-entropy alloy material Material.
The laser, which increases, absorbs paint for SiO2、Al2O3Mixed type makes paint by oneself, wherein SiO2With Al2O3Mass ratio is 3:5。
The FeAlCrNiSiC system high entropy alloy material average hardness 776HK of acquisition, with standard high carbon ferro-chrome FeCr55C600 Relative wear coefficient be 2.15.
Embodiment 4
A method of FeAlCrNiSiC system high entropy alloy material, experiment stream are prepared using welding and the double heat sources of laser Journey figure is shown in Fig. 1, specifically follows the steps below:
Step 1, raw material powder is prepared
According to the ratio, the aluminium powder that chromite powder and granularity are 400 mesh is mixed, obtains mixed material；Wherein, in mass ratio, Chromite powder: aluminium powder=3:1；
It is then placed in mixed material roughing in ball grinder, is placed in ball milling 5h on ball mill, ball milling speed 100rpm, It is 300 mesh, uniformly mixed raw material powder that screening, which obtains granularity,；
Step 2, preset green compact block is suppressed
Prepare the green compact mold with rectangle type chamber, is made of ejection seat 2, former 1 and compression bar 3, structural schematic diagram See Fig. 2；
By uniformly mixed raw material powder, addition 8 is dripped after glass, and raw material powder just starts to become tide discoloration stopping drop Add, after being stirred, is put into inside the type chamber of ready green compact mold, raw material powder is being pressed with hairbrush and the saw blade back side It is paved in mold tool, using the hydraulic sample machine of WE-30 hydraulic universal, is suppressed, obtained under the pressure of 110kN using compression bar To the preset green compact block of cuboid, after drying in the shade for 24 hours, 120 DEG C of drying 5h, the preset pressure after being dried are warming up in drying box Briquet；
The preset green compact block is cuboid, having a size of 40mm × 10mm × 4mm, relative density 88%.
Step 3, argon tungsten-arc welding cladding
By the preset green compact block after drying, it is placed in and grinds 20 steel matrix that derusting dirt and oxide skin is gone in mill epidermis face by angle On, heat source is done with argon tungsten-arc welding and carries out cladding, obtains the product with preliminary cladding layer；The welding of the argon tungsten-arc welding Electric current is 180A, and the flow of argon gas is 7L/min, speed of welding 70mm/min, keeps built-up welding speed and welding current intensity steady It is fixed, effectively control the swing of welding gun.
Step 4, laser melting coating
By the product with preliminary cladding layer after argon tungsten-arc welding cladding, gently abate coating will be preliminary with angle grinder Clad layer surface polishes, and removal is formed and applied after preliminary clad layer surface applies one layer of laser increasing absorption paint with a thickness of 0.8mm Then coating is placed on numerically-controlled machine tool rapidly, start RofinDC050 type laser machine, and it is molten to carry out single track laser coatings It covers；
After laser lights coat, laser machine is closed, laser melting coating reaction is brought it about, obtains cladding coating Composite material；Wherein, laser melting and coating process are as follows: laser power 2700W, hot spot are long 10mm, the broadband rectangular light of wide 2mm Spot, scanning speed 3mm/s；The laser, which increases, absorbs paint for SiO2、Al2O3Mixed type makes paint by oneself, wherein SiO2With Al2O3 Mass ratio is 3:10.
After reaction, cladding coating composite material is cooled to room temperature, obtains FeAlCrNiSiC system high-entropy alloy material Material.

Claims (10)

1. a kind of method for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding, which is characterized in that It follows the steps below:
Step 1, raw material powder is prepared
According to the ratio, chromite powder and aluminium powder are mixed, obtains mixed material；Wherein, in mass ratio, chromite powder: aluminium powder=3:1；
By mixed material, roughing, ball milling, screening obtain the raw material powder that granularity is 200 ~ 400 mesh；
Step 2, preset green compact block is suppressed
Waterglass is added dropwise in the raw material powder that will be uniformly mixed, when raw material powder just starts to become tide discoloration stopping dropwise addition, stirring Afterwards, it is put into inside ready green compact mold, raw material powder is put down in green compact mold middle berth, is suppressed, obtains preset pressure Briquet after drying in the shade, is dried in drying box, the preset green compact block after being dried；
Step 3, argon tungsten-arc welding cladding
By the preset green compact block after drying, it is placed in surface and goes on the dirty matrix with oxide skin of derusting, heat is done with argon tungsten-arc welding Source carries out cladding, obtains the experiment block with preliminary cladding layer；The welding current of the argon tungsten-arc welding is 170 ~ 190A, argon The flow of gas is 6 ~ 8L/min, and speed of welding is 60 ~ 70mm/min；
Step 4, laser melting coating
(1) by the experiment block with preliminary cladding layer after argon tungsten-arc welding cladding, gently abate coating, by preliminary cladding layer table Face polishes, and removal forms coat, so after preliminary clad layer surface applies one layer of laser increasing absorption paint with a thickness of 0.8 ~ 1mm It is placed on numerically-controlled machine tool rapidly afterwards, starts laser machine, carry out the cladding of single track laser coatings；
(2) after laser lights coat, laser machine is closed, cladding coating material is obtained；Wherein, laser melting and coating process Are as follows: laser power is 2700 ~ 3100W, and hot spot is long 10mm, the broadband rectangular light spot of wide 2mm, 3 ~ 7mm/s of scanning speed；
(3) after reaction, cladding coating material is cooled to room temperature, obtains FeAlCrNiSiC system high entropy alloy material.
2. the side as described in claim 1 for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding Method, which is characterized in that in the step 1, the chromite powder is selected former chromite powder, the ingredient contained and each The mass percent of ingredient is 24.36%Cr2O3、14.10%FeO、18.74%Fe2O3、20.16%SiO2、12.32%Al2O3、5.4% CaO, 2.85%NiO, surplus are inevitable impurity.
3. the side as described in claim 1 for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding Method, which is characterized in that in the step 1, the aluminium powder, purity >=99.9wt%, granularity is 200 ~ 300 mesh.
4. the side as described in claim 1 for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding Method, which is characterized in that in the step 1, the ball-milling technology are as follows: raw material loading ball grinder is placed on ball mill, ball 4 ~ 6h is ground, ball milling speed is 100 ~ 200rpm.
5. the side as described in claim 1 for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding Method, which is characterized in that in the step 2, the pressing process are as follows: use the hydraulic sample machine of WE-30 hydraulic universal, benefit With compression bar by raw material powder compression moulding, presser bar pressure is 80 ~ 110kN.
6. the side as described in claim 1 for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding Method, which is characterized in that in the step 2, the preset green compact block is tetragonal body.
7. the side as described in claim 1 for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding Method, which is characterized in that in the step 2, the time of drying in the shade is for 24 hours；The drying uses drying box, drying temperature It is 120 ~ 150 DEG C, drying time is 3 ~ 5h.
8. the side as described in claim 1 for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding Method, which is characterized in that in the step 3, the matrix is 40Cr matrix, one in 20 steel matrix or Q235 steel matrix Kind.
9. the side as described in claim 1 for preparing FeAlCrNiSiC system high entropy alloy material with the double heat sources of laser using welding Method, which is characterized in that in the step 4 (1), the laser, which increases, absorbs paint for SiO2、Al2O3Mixed type makes paint by oneself, Wherein, in mass ratio, SiO2: Al2O3=(11 ~ 3): (3 ~ 10).
10. preparing the high entropy of FeAlCrNiSiC system using welding and the double heat sources of laser as described in any one of claim 1 ~ 9 The method of alloy material, which is characterized in that FeAlCrNiSiC system obtained high entropy alloy material, the element contained and each member Element atomic fraction be Fe+C be 88.16%, Al 6.28%, Si 2.52%, Cr 1.36%, Ni 1.68%, it is obtained FeAlCrNiSiC system high entropy alloy material 735 ~ 776HK of average hardness, the relative wear with standard high carbon ferro-chrome FeCr55C600 Coefficient is 1.86.
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