CN106894015B - Argon arc cladding high entropy alloy coating and preparation method thereof - Google Patents

Argon arc cladding high entropy alloy coating and preparation method thereof Download PDF

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CN106894015B
CN106894015B CN201710108364.5A CN201710108364A CN106894015B CN 106894015 B CN106894015 B CN 106894015B CN 201710108364 A CN201710108364 A CN 201710108364A CN 106894015 B CN106894015 B CN 106894015B
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entropy alloy
matrix
argon arc
high entropy
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CN106894015A (en
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董世知
马壮
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Liaoning Technical University
Liaoning Institute of Science and Technology
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Liaoning Technical University
Liaoning Institute of Science and Technology
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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
    • C23C24/106—Coating with metal alloys or metal elements only
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper

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  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention discloses a kind of Argon arc cladding high entropy alloy coatings and preparation method thereof, belong to alloy coat and its preparation technical field.For the preparation method using Q235 steel as matrix, Fe, Al, Cr, Cu, Co and Ti element are composition high-entropy alloy element, are prepared for high entropy alloy coating using the method for Argon arc cladding.In the high entropy alloy coating being prepared, FexAlCrCuCoTi0.4(x=0,1) is institutional framework in high entropy alloy coating by single BCC phase composition, Fe1AlCrCuCoTi0.4It is in metallurgical bonding between high entropy alloy coating and matrix, microhardness, abrasive wear and the erosion-wear-resisting performance of coating improve a lot both with respect to matrix, meets needs of production, and promote extensive use of the high-entropy alloy on the surface of the material in engineering.

Description

Argon arc cladding high entropy alloy coating and preparation method thereof
Technical field
The invention belongs to alloy coat and its preparation technical fields, specifically, referring to a kind of Argon arc cladding high-entropy alloy Coating and its preparation method and application.
Background technique
With the rapid development of science and technology, the research in Material Field in terms of new material has become the new direction of people's research. Therefore, composite material is because its excellent properties are as research hotspot, and passes through and apply additional, the various nitrogen of in-situ preparation The composite material that the method for compound, carbide, oxide, boride etc. is prepared successfully has been applied in industry and actual production In.The height that Ye Junwei etc. (Ye Junwei high-irregularity multi-element alloy: CN, CN1353204 [P] .2002) is proposed in the 1990s Entropy alloy, the performances such as the higher intensity having by it, wearability, corrosion resistance and high temperature resistant softening are concerned.High entropy closes Gold is multi-principal high-entropy alloy, and also known as more high randomness alloys of pivot are alloy (the pivot numbers using multiple element as pivot N >=5), the atomic percent of each essential element is all higher, but is no more than 35%.In recent years, people are studying high-entropy alloy On the basis of, start also to study high-entropy alloy-base composite material, but relevant report is also seldom, for its phase composition, enhancing Structure composition of the formation of phase, strengthening mechanism and interface etc. at home and abroad all seldom report by periodical.
Currently, the method for preparation high entropy alloy material has very much, but each preparation method all has its advantage, while Drawback can be had.So in the preparation process of high-entropy alloy, it is necessary to performance, the use being had according to selected element and required alloy Way selects suitable preparation method.Studies have shown that powder metallurgic method, height (in) frequency induction stove heating and the method for founding be Prepare the main method of blocky high entropy alloy material；Mechanical alloying method is the main preparation methods of high entropy alloy powder；High entropy The preparation of alloy coating material is then generally adopted by hot spray process, laser rapid solidification method, laser cladding and Argon arc cladding Method；For high-entropy alloy thin-film material, magnetron sputtering method and electrochemical deposition method are mainly used.
Summary of the invention
In order to solve the problems in the existing technology and demand, the present invention is according to the related law of configuration high-entropy alloy, It selects suitable metal element powder (Fe, Al, Cr, Cu, Co and Ti element), prepares high entropy alloy powder.Using Q235 steel as base Body, Fe, Al, Cr, Cu, Co and Ti element are the essential element for forming high-entropy alloy, are prepared for height using the method for Argon arc cladding Entropy alloy coat.
It is ground using metallographic microscope, scanning electron microscope, X-ray diffractometer, microhardness testers, abrasive wear experimental machine and erosion Experimental machine is damaged to the microstructure and mechanics of Argon arc cladding high entropy alloy coating and active Argon arc cladding high entropy alloy coating Performance is tested and is analyzed.
The preparation method of Argon arc cladding high entropy alloy coating provided by the invention, includes the following steps:
The first step, the preparation of matrix.
It using rolling state Q235A steel as basis material, polishes, cleans, drying is placed in spare in drying box.
Second step, coating material are chosen.
Element of the six kinds of elements of Fe, Al, Cr, Cu, Co, Ti as high-entropy alloy is selected, Fe is designedxAlCrCuCoTi0.4(x =1,0) high entropy alloy coating matches.
Third step, Argon arc cladding A-TIG welding method prepare Argon arc cladding high entropy alloy coating.
The powder of high temperature alloy element, is then pressed into prefabricated section needed for being weighed according to formula.Prefabricated section is placed in matrix table Face prepares high-entropy alloy base composite coating using the method for Argon arc cladding, preparation process and parameter include: welding current 180~ 220A, 60~80mmmin of speed of welding-1, 6~7.5Lmin of argon flow-1, 2~4mm of arc length.
Preferably, the speed of welding is 75mmmin-1, argon flow 6Lmin-1, arc length 3.5mm, weldering Meet electric current 200A.
The Argon arc cladding uses WS-500 type AC/DC pulse TIG Welding Machine.
In the high entropy alloy coating that the above method is prepared, FexAlCrCuCoTi0.4(x=0,1) is that high-entropy alloy applies Institutional framework in layer is by single BCC phase composition, the microhardness 497.8HV of coating0.2~524.9HV0.2；It is ground in abrasive grain In damage experiment, when load is 40N, the wearability of coating improves 3.35~4.12 times compared with matrix；When load is 60N, compared with base Body improves 3.06~3.55 times；It is respectively 200r/min, 300r/min and 400r/min in revolving speed in erosive wear experiment When, the erosion-wear-resisting performance of coating improves 2.56~3.76 times compared with matrix；It is respectively 5000:1600,5000 in concentration of medium: When 2800 and 5000:4000, the erosion-wear-resisting performance of coating improves 2.59~5.27 times compared with matrix.Fe1AlCrCuCoTi0.4 It is in metallurgical bonding between high entropy alloy coating and matrix, microhardness is up to 524.9HV0.2, about 3.07 times of matrix.Coating Abrasive wear and erosion-wear-resisting performance improve a lot both with respect to matrix.
The present invention has the advantages that
(1) present invention realizes that arc cladding technology is combined with advanced high entropy alloy material, promotes high-entropy alloy and exists Extensive use on material surface engineering.
(2) method that the present invention uses Argon arc cladding prepares high entropy alloy coating, improves material using Q235 steel as matrix Expect surface hardness, wearability, meets needs of production.
Detailed description of the invention
Figure 1A, 1C and 1E are Fe in the present invention1High entropy of the coating when welding current is respectively 180A, 200A and 220A closes Gold plating surface topography schematic diagram.
Figure 1B, 1D and 1F are Fe in the present invention0High entropy of the coating when welding current is respectively 180A, 200A and 220A closes Gold plating surface topography schematic diagram.
Fig. 2A, 2C and 2E are Fe in the present invention1High entropy of the coating when welding current is respectively 180A, 200A and 220A closes Gold plating Cross Section Morphology schematic diagram.
Fig. 2 B, 2D and 2F are Fe in the present invention0High entropy of the coating when welding current is respectively 180A, 200A and 220A closes Gold plating Cross Section Morphology schematic diagram.
Fig. 3 A and Fig. 3 B are respectively Fe1Coating and Fe0The XRD spectra of coating.
Fig. 4 A and Fig. 4 B are respectively Fe1Coating and Fe0Microstructure image in the middle part of coating.
Fig. 5 is Fe1Coating and Fe0Coating microhardness distribution curve.
The abrasive wear behavior weight-loss curve that Fig. 6 A and Fig. 6 B are measured when being respectively load 40N and 60N.
Fig. 7 A~7D is respectively the Erosive Properties curve and not of revolving speed 200r/min, 300r/min, 400r/min With weight-loss curve under speed conditions.
Fig. 8 A~8D is respectively the Erosive Properties that concentration of medium is 5000:1600,5000::2800,5000:4000 And the weight-loss curve under different medium concentration.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
Present invention firstly provides a kind of preparation methods of Argon arc cladding high entropy alloy coating, the specific steps are as follows:
The first step, the preparation of matrix.
It is as shown in table 1 at being grouped as using rolling state Q235A steel as basis material.Before being tested, first will Q235A steel plate is prepared into having a size of 100mm × 30mm × 8mm sample, is then polished with angle grinder, and the oxidation on its surface is removed Skin and iron rust finally clean its surface with acetone, and are dried up with hair dryer, are placed in spare in drying box.
The chemical component (Wt%) of 1 Q235A steel of table
Second step, coating material are chosen.
Select element of the six kinds of elements of Fe, Al, Cr, Cu, Co, Ti as high-entropy alloy, the atomic radius between each element Difference is less than 12%.Design FexAlCrCuCoTi0.4(x=1,0) high entropy alloy coating matches.For convenience, by high-entropy alloy Coating is denoted as FexCoating, i.e. Fe1Coating, Fe0Coating.
Third step, Argon arc cladding A-TIG welding method prepare Argon arc cladding high entropy alloy coating.
The quality of powder needed for being weighed according to formula, is placed in mortar, and the waterglass that suitable modulus is 2.5 is added, grinds It pours into after mill is uniform having a size of in the rectangular mould of 80mm × 10mm × 2mm, is existed using WE-30 hydraulic universal experimental machine Wetting powder is pressed into prefabricated section under 110MPa pressure, the prefabricated section pressed is dried in the shade and is placed on 150 DEG C of bakings in drying box afterwards for 24 hours Dry 2h.Then the method for Argon arc cladding is recycled to prepare high-entropy alloy base composite coating, preparation process and parameter include: welding electricity Flow 180~220A, 60~80mmmin of speed of welding-1, 6~7.5Lmin of argon flow-1, 2~4mm of arc length.
Preferably, the speed of welding is 75mmmin-1, argon flow 6Lmin-1, arc length 3.5mm.
The Argon arc cladding uses WS-500 type AC/DC pulse TIG Welding Machine.
Embodiment 1:
The first step, the preparation of matrix.
Using rolling state Q235A steel as basis material, Q235A steel plate is prepared into having a size of 100mm × 30mm first The sample of × 8mm, is then polished with angle grinder, removes the oxide skin and iron rust on its surface, finally cleans its surface with acetone, and It is dried up, is placed in spare in drying box with hair dryer.
Second step, coating material are chosen.
Element of the six kinds of elements of Fe, Al, Cr, Cu, Co, Ti as high-entropy alloy is selected, Fe is designed1AlCrCuCoTi0.4It is high Entropy alloy coat proportion, is denoted as Fe for high entropy alloy coating1Coating.
Third step, Argon arc cladding A-TIG welding method prepare Argon arc cladding high entropy alloy coating.
The quality of high entropy alloy coating powder needed for being weighed according to formula, is placed in mortar, and it is 2.5 that suitable modulus, which is added, Waterglass, grinding uniformly after pour into having a size of in the rectangular mould of 80mm × 10mm × 2mm, use WE-30 hydraulic universal Wetting powder is pressed into prefabricated section under 110MPa pressure by experimental machine, and the prefabricated section pressed is dried in the shade and is placed on drying box afterwards for 24 hours In 150 DEG C of drying 2h.Then the method for Argon arc cladding is recycled to prepare high-entropy alloy base composite coating, preparation process and parameter packet It includes: tri- kinds of welding current 180A, 200A and 220A, speed of welding 75mmmin-1, argon flow 6Lmin-1, arc length 3.5mm。
Embodiment 2:
The first step, the preparation of matrix, with embodiment 1.
Second step, coating material are chosen.
Element of the six kinds of elements of Fe, Al, Cr, Cu, Co, Ti as high-entropy alloy is selected, Fe is designed0AlCrCuCoTi0.4It is high Entropy alloy coat proportion, is denoted as Fe for high entropy alloy coating0Coating.Fe0Matrix when referring to not additional Fe powder, and utilizing Argon arc cladding The Fe atom provided is provided.
Third step, Argon arc cladding A-TIG welding method prepare Argon arc cladding high entropy alloy coating.
With embodiment 1.
The method of Argon arc cladding prepares high-entropy alloy base composite coating, preparation process and parameter include: welding current 180, 200A, 220A, speed of welding 75mmmin-1, argon flow 6Lmin-1, arc length 3.5mm.
Embodiment 3:
The first step, the preparation of matrix, with embodiment 1.
Second step, coating material are chosen.
Element of the six kinds of elements of Fe, Al, Cr, Cu, Co, Ti as high-entropy alloy is selected, Fe is designed1AlCrCuCoTi0.4It is high Entropy alloy coat proportion.
Third step, Argon arc cladding A-TIG welding method prepare Argon arc cladding high entropy alloy coating.
With embodiment 1.
The method of Argon arc cladding prepares high-entropy alloy base composite coating, and preparation process and parameter include: welding current 200A, Speed of welding 80mmmin-1, argon flow 7.5Lmin-1, arc length 4mm.
Embodiment 4:
The first step, the preparation of matrix, with embodiment 1.
Second step, coating material are chosen.
Element of the six kinds of elements of Fe, Al, Cr, Cu, Co, Ti as high-entropy alloy is selected, Fe is designed0AlCrCuCoTi0.4It is high Entropy alloy coat proportion.
Third step, Argon arc cladding A-TIG welding method prepare Argon arc cladding high entropy alloy coating.
With embodiment 1.
The method of Argon arc cladding prepares high-entropy alloy base composite coating, and preparation process and parameter include: welding current 200A, Speed of welding 60mmmin-1, argon flow 7Lmin-1, arc length 2mm.
Figure 1A, 1C and 1E are Fe in embodiment 11Surface topography of the coating under three kinds of welding currents, Figure 1B, 1D and 1F are Fe in embodiment 20Surface topography of the coating in three kinds of welding currents.With reference to the accompanying drawings comparison it is found that welding current be 180A when, Welding bead is narrow and thin, is uneven, and it is many that coating is higher by matrix, has many parts unmelted into matrix.When welding current is 220A, Since heat input is excessive, Q235 steel matrix is easy by burn-through, and forming effect is poor, and when welding current is 200A, pass through sight It examines it can be found that welding bead is uniform and lines is clear, the wider width of welding bead, prefabricated section melts well to be entered in matrix, and welding bead Surrounding does not occur not welding into or penetrating phenomenon.Fe0There is a little gas hole defect on the surface of coating, but sprawls effect and be better than Fe1It applies Layer, Fe1Coating formation is more beautiful, surface no significant defect.
Table 2 is Fe1Coating and Fe0Weld size of the coating under different electric currents.It is in electric current as can be seen from Table 2 When 200A, the depth-to-width ratio of two kinds of coatings reaches maximum.Fig. 2A~2F is the Cross Section Morphology of coating, it can be seen from the figure that When electric current is 200A, Fe1Coating and Fe0Coating all obtains larger fusion penetration, and effect is best.But due to Fe0The molten wide of coating compared with Greatly, depth-to-width ratio is smaller.It is measured using USB digit microscope, Fe1The fusion penetration of coating is 4.30mm, molten wide 9.91mm, deep width Than being 0.43；Fe0The fusion penetration of coating is 4.36mm, molten wide 14.79mm, depth-to-width ratio 0.29.
2 depth-to-width ratio result of table
Fig. 3 A and 3B are respectively high-entropy alloy Fe1AlCrCoCuTi0.4With high-entropy alloy Fe0AlCrCoCuTi0.4Coating group The XRD diffraction pattern knitted.As seen from the figure, the phase composition of two kinds of high-entropy alloys is all fairly simple, by single body-centered cubic phase (BCC) it forms, does not have other complicated mutually generations, BCC phase is mainly Fe-Cr solid solution and a small amount of AlxFeyIt is to change between metal Close object.As can be seen from Figure, the Fe of additional Fe powder1The Fe of the less additional Fe powder of the diffraction maximum of coating0Coating is remarkably reinforced, This absolutely proves that BCC phase is continuously increased as Fe constituent content increases, and orderly BCC structure and a small amount of intermetallic Object all can promote coating to possess higher hardness.
Fig. 4 A and Fig. 4 B are respectively Fe1Coating and Fe0The middle part displaing micro tissue topography of coating, it can be seen from the figure that Fe1 Coating and Fe0The middle part microscopic structure of coating is similar, is in irregular polygonal network distribution of shapes, in polygonal network shape Tissue disperse divides a large amount of particulate materials.Fe in comparison diagram1Coating and Fe0The tissue topography of coating is it can be found that Fe1It applies The crystal boundary of layer is unobvious, and tissue is relatively fine, and the crystal boundary of Fe0 coating is more visible, but tissue is coarseer, has absolutely proved Fe element Addition refining effect is played to coating structure.
Fig. 5 is the microhardness curve graph of Fex coating.It can be seen from the figure that the microhardness curve of Fe1 coating is located at The top of Fe0 coating illustrates that its microhardness is higher.The hardness of two kinds of coatings along fusion penetration direction decline trend in gradient, and The peak value of coating microhardness is not in most edge, this is because coating surface is due to by electric arc during Argon arc cladding Directly heat effect, the scaling loss of alloying element, volatilization are more serious, and pressure head is easy the loose structure on conquassation surface layer when test, It is lower so as to cause edge hardness, from outward appearance to inner essence to certain depth when microhardness can just reach maximum value, then gentle drop Low, in the bond area of coating and matrix, because the hard-phase particles quantity that diluting effect generates is reduced, microhardness is lower.
Abrasive wear experiment is carried out using 4# sand paper, table 3 and Fig. 6 are respectively that abrasive wear is carried out under 40N, 60N load Resulting data and unit area weight-loss curve figure.It can see that Fe when load is 40N from table0Coating and Fe1Coating it is resistance to Mill property is respectively increased 3.35 and 4.12 times compared with matrix, and Fe when load is 60N0Coating and Fe1The wearability of coating is distinguished compared with matrix Improve 3.06 and 3.50 times.
3 different loads abrasive wear unit area loss amount of table
From fig. 6, it can be seen that the unit area weight-loss curve figure of matrix is located at the unit area weight-loss curve figure of coating Top and, this illustrate matrix abrasion it is the most serious, the wearability of two kinds of coatings is superior to matrix, wherein Fe1Coating it is relatively resistance to Mill property is best.As time increases, the linear ascendant trend of abrasion loss curve of matrix, relative wear resistance is poor, and Fe1It applies The weight loss curve of layer gradually tends to be steady state, and the rate of rising reduces, and shows good Abrasive Resistance of Stubble-cleaning.
Influence using control variate method research revolving speed and erosion concentration of medium to experimental result.I.e. erosion angle is 90 °, sand Seed degree is 40~70, the erosion time is 30min.
Selecting erosive wear concentration of medium (water constituents) is 5000:2800, and erosion angle is 90 °, and revolving speed is respectively 200r/ Min, 300r/min and 400r/min.Different rotating speeds condition lower substrate and FexThe erosive wear data of coating are as shown in table 4.It is logical Cross further calculating, Fe after erosive wear 120min1Coating and Fe0The erosion-wear-resisting performance of coating is respectively increased compared with matrix 3.67~3.76 and 2.56~2.59 times.
Erosive wear data under the conditions of 4 different rotating speeds of table
By Fig. 7 A~7C it is found that under conditions of same rotational speed, the erosive wear of matrix is the most serious, and two kinds of coatings Erosion-wear-resisting performance is preferable.By Fig. 7 D it is found that with revolving speed increase, the kinetic energy of the sand grains in erosion medium increases, material The erosive wear rate of material increases, Fe1The unit area weight loss curve climbing speed of coating is slower, erosive resistance Better than matrix.
It selects in erosive wear revolving speed to be 300r/min, erosion angle is 90 °, and concentration of medium (water constituents) is respectively 5000: 1600, erosive wear experiment is carried out under conditions of 5000:2800 and 5000:4000.Under different medium concentration conditions, matrix and FexThe erosive wear weight loss of coating is as shown in table 5.By calculate it can be concluded that, erosive wear revolving speed be 300r/min when Different medium concentration Fe1Coating and Fe0The erosion-wear-resisting of coating compared with matrix be respectively increased 3.46~5.27 and 2.59~ 4.65 again.By Fig. 8 A~8D it is found that under conditions of same rotational speed, different medium concentration, the erosive wear weight loss of matrix is most Greatly, Fe1Coating erosive wear weight loss is minimum, illustrates that its erosion-wear-resisting performance is best.At erosive wear initial stage, matrix and The erosive wear wt-lossing rates of coating are very fast because matrix and composite coating surface irregularity and combine it is insecure, wearing Fast-falling in the process leads to the reduction of quality.With the extension of erosive wear time, the Mass lost amount of matrix and coating by It is cumulative big, but matrix and composite coating have entered the stable state erosive wear stage at this time, and erosive wear wt-lossing rates are relatively slow.
Erosive wear data under 5 different medium concentration of table
In summary, in the case where invariablenes turning speed, with the increase of water constituents, the unit area of matrix and coating is worn Amount, which all first increases, to be reduced, but is in general all in rising form.And the abrasion loss of matrix is always larger than the abrasion loss of coating, Obviously, the preparation of coating significantly improves the wearability of matrix, wherein the Fe of additional Fe powder1The wearability of coating is bright The aobvious Fe better than not additional Fe powder0The wearability of coating.
By testing it is found that Fe1Coating, Fe0The microhardness of coating can reach 524.9HV0.2、497.8HV0.2.? In abrasive wear experiment, when load is 40N, Fe1Coating, Fe0The wearability of coating is respectively increased 4.12,3.35 times compared with matrix； And when load is 60N, 3.55,3.06 times are respectively increased compared with matrix.It is respectively 200r/ in revolving speed in erosive wear experiment Fe when min, 300r/min and 400r/min1Coating, Fe0The erosion-wear-resisting performance of coating is respectively increased 3.67 compared with matrix~ 3.76 and 2.56~2.59 times；When concentration of medium is respectively 5000:1600,5000:2800 and 5000:4000, Fe1Coating and Fe0The erosion-wear-resisting performance of coating is respectively increased 2.59~4.65 and 3.46~5.27 times compared with matrix.
To sum up, it can be seen that Fe1The hardness and polishing machine of coating are superior to Fe0The hardness and polishing machine of coating.Knot It closes XRD object mutually to be analyzed, the addition of Fe element improves the entropy of mixing of system, promotes the formation of simple solid solution, reduces Electronegativity difference, while inhibiting effect is played to the generation of weld metal zone brittle intermetallic thing.

Claims (6)

1. the preparation method of Argon arc cladding high entropy alloy coating, it is characterised in that: include the following steps,
The first step, the preparation of matrix；
It using rolling state Q235A steel as basis material, polishes, cleans, drying is placed in spare in drying box；
Second step, coating material are chosen；
Element of the six kinds of elements of Fe, Al, Cr, Cu, Co, Ti as high-entropy alloy is selected, Fe is designedxAlCrCuCoTi0.4High entropy closes Gold plating proportion, x=1,0；
Third step, Argon arc cladding prepare Argon arc cladding high entropy alloy coating；
The powder of high temperature alloy element, is then pressed into prefabricated section needed for being weighed according to formula；Prefabricated section is placed in matrix surface, benefit High-entropy alloy base composite coating is prepared with the method for Argon arc cladding, preparation process and parameter include: 180~220A of welding current, 60~80mmmin of speed of welding-1, 6~7.5Lmin of argon flow-1, 2~4mm of arc length；
Institutional framework in the above-mentioned high entropy alloy coating being prepared is by single BCC phase composition, the microhardness of coating 497.8HV0.2~524.9HV0.2；In abrasive wear experiment, when load is 40N, the wearability of coating is improved compared with matrix 3.35~4.12 times；When load is 60N, 3.06~3.55 times are improved compared with matrix；In erosive wear experiment, distinguish in revolving speed When for 200r/min, 300r/min and 400r/min, the erosion-wear-resisting performance of coating improves 2.56~3.76 times compared with matrix；? When concentration of medium is respectively 5000:1600,5000:2800 and 5000:4000, the erosion-wear-resisting performance of coating is improved compared with matrix 2.59~5.27 times.
2. the preparation method of Argon arc cladding high entropy alloy coating according to claim 1, it is characterised in that: the welding Speed is 75mmmin-1, argon flow 6Lmin-1, arc length 3.5mm, welding current 200A.
3. the preparation method of Argon arc cladding high entropy alloy coating according to claim 1, it is characterised in that: the argon arc Cladding uses WS-500 type AC/DC pulse TIG Welding Machine.
4. the preparation method of Argon arc cladding high entropy alloy coating according to claim 1, it is characterised in that: described is prefabricated Block is prepared as follows to obtain: the powder of high temperature alloy element is placed in mortar, and the waterglass that modulus is 2.5 is added, grinds It pours into mold, is pressed into wetting powder under 110MPa pressure using WE-30 hydraulic universal experimental machine prefabricated after mill is uniform The prefabricated section pressed is dried in the shade and is placed on 150 DEG C of drying 2h in drying box afterwards for 24 hours by block.
5. a kind of Argon arc cladding high entropy alloy coating, it is characterised in that: the institutional framework in high entropy alloy coating is by single BCC Phase composition, Fe1AlCrCuCoTi0.4It is in metallurgical bonding between high entropy alloy coating and matrix, microhardness is up to 524.9HV0.2, it is 3.07 times of matrix.
6. a kind of Argon arc cladding high entropy alloy coating according to claim 5, it is characterised in that: tested in abrasive wear In, when load is 40N, the wearability of coating improves 4.12 times compared with matrix；When load is 60N, 3.55 times are improved compared with matrix； In erosive wear experiment, when revolving speed is respectively 200r/min, 300r/min and 400r/min, the erosion-wear-resisting of coating 3.67~3.76 times can be improved compared with matrix；When concentration of medium is respectively 5000:1600,5000:2800 and 5000:4000, apply The erosion-wear-resisting performance of layer improves 3.46~5.27 times compared with matrix.
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