CN113754444B - High-hardness high-strength wear-resistant compound coating and preparation method thereof - Google Patents
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Abstract
The invention discloses a high-hardness high-strength wear-resistant compound coatingA layer and a preparation method thereof, belonging to the field of ceramic compound coating preparation. The method adopts a process combining mechanical mixing, high-temperature sintering and induction heating extrusion molding to prepare the Al with the three-phase structure of FCC, HCP1 and HCP2 x Ce y CoCrNiO p Tb q TiY m Zr(0.1≤x≤1.3；0.1≤y≤1；0.1≤p≤0.5；0.1≤q≤1；0.1≤m≤1；0.01<x/(x+y+m+p+q+5)<0.25；0.01<y/(x+y+m+p+q+5)<0.20；0.01<p/(x+y+m+p+q+5)<0.10；0.01<q/(x+y+m+p+q+5)<0.20；0.01<m/(x+y+m+p+q+5)<0.20 Compound target material; then depositing and coating the surface of the workpiece subjected to sand blasting treatment and generating a gradient coating in situ to prepare the (Al) x Ce y CoCrNiO p Tb q TiY m Zr) N coating has high hardness, can obviously improve the wear resistance and the service life of the workpiece, is green and environment-friendly, and is suitable for industrial production.
Description
Technical Field
The invention belongs to the field of preparation of ceramic compound coatings, and particularly relates to a high-hardness high-strength wear-resistant compound coating and a preparation method thereof.
Background
The material coating can effectively improve the abrasion and corrosion resistance of the matrix, and can also effectively improve the service performance and the service life of the material. If the cutting tool that common machinist used is honored as industry tooth, the coating cutter then can be the protective layer of tooth, not only can avoid the direct contact of cutter base member material with the work piece by processing in the course of working, can also effectively protect the cutter base member. With the continuous expansion of the application range of cutting processing, the requirements on the performance of the cutter are higher and higher. The existing cutter coating not only can improve the hardness and the wear resistance of a cutter matrix, but also can improve the special performances of the cutter such as thermal stability, oxidation resistance, chemical stability and the like. The Physical Vapor Deposition (PVD) technology is widely applied in the field of tool coatings because the deposition temperature is low and does not exceed the tempering temperature of high-speed steel which is a main stream tool base material, and because a PVD coating has the advantages of high hardness, high wear resistance, low friction coefficient and good chemical stability. The traditional PVD coating such as TiN coating is easy to cause coating spalling and failure due to large performance difference with a matrix; the ternary coatings (such as TiAlN coatings) developed on the basis of the method have improved mechanical, oxidation resistance, friction resistance and cutting performance, but the performance of the ternary coatings is still not fully satisfactory under some special conditions. The PVD coating performance is closely related to the components and the structure of the target material used by the PVD coating, and further the coating performance is influenced, for example, the nanometer multilayer composite structure modulated by the components can not combine the advantages of different alloy components, and can coordinate the performance among the coating structures to generate a synergistic effect, so that the service performance can be obviously improved, and the application range can be effectively expanded. The multi-component compound coating is composed of a plurality of elements, the crystal structure of the multi-component compound coating is different from the crystal structure of the constituent elements, and a brand new crystal structure composed of a plurality of specific constituent elements is formed. Because of various element types, the mismatching degree at the interface of different types of substrates and coatings is easy to reduce, so that the coating has higher binding force; meanwhile, the distribution of elements in the multi-component compound can be subjected to in-situ generation and growth self-regulation of the gradient coating according to the atom distribution condition at the interface of the matrix and the coating and the effectiveness of the non-uniform substrate, so that the defects in the coating are reduced. Meanwhile, according to the actual production requirements, the component and the structure design of the compound coating can be carried out on workpieces treated in large batch for a long time, and the compound coating target with brand new chemical components and crystal structures is designed, so that the service performance of the coated workpieces is improved and the service life of the coated workpieces is prolonged in a targeted manner. By combining the preparation process of the compound target, the hardness and the wear resistance of the compound can be obviously improved due to fine crystal strengthening, solid solution strengthening and dispersion strengthening, and the performance of the compound coating can be exerted to a greater extent. According to the related theory of the compound, the compound target with a brand-new crystal structure can be prepared, so that a brand-new compound coating can be prepared, the service performance and the service life of the compound coating can be obviously improved, and the application range of the compound coating is greatly promoted. Therefore, the high-performance compound coating prepared on the surface of the workpiece by designing and preparing the high-hardness high-strength wear-resistant compound target has wide market prospect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-hardness high-strength wear-resistant compound (Al) x Ce y CoCrNiO p Tb q TiY m Zr) N coatings and methods of making the same.
The invention provides a high-hardness high-strength wear-resistant compound (Al) x Ce y CoCrNiO p Tb q TiY m Zr) N coating and a preparation method thereof, and the high-hardness high-strength wear-resistant compound target material is prepared by the process of combining mechanical mixing, high-temperature sintering and induction heating extrusion molding, and the chemical formula of the compound is Al x Ce y CoCrNiO p Tb q TiY m Zr, which is a three-phase structure composed of FCC (face-centered cubic structure, space group Fm-3m (225), lattice constant 1.111609 nm), HCP1 (hexagonal close packed structure, space group P63/mmc (194), lattice constant a = b =0.515846nm, c = 0.831097nm) and HCP2 (hexagonal close packed structure, space group P63/mmc (194), lattice constant a = b =0.785922nm, c = 0.779709nm); the surface of the workpiece is subjected to sand blasting treatment, deposition coating is carried out, and gradient (Al) is generated in situ x Ce y CoCrNiO p Tb q TiY m Zr) N coating, prepared (Al) x Ce y CoCrNiO p Tb q TiY m Zr) N plating layer is uniform, and hardness and wear resistance of the workpiece can be greatly improved.
The technical scheme for realizing the invention is as follows: the preparation method of the high-hardness high-strength wear-resistant compound coating is characterized by comprising the following steps of:
(1) According to the chemical formula Al of the compound target material x Ce y CoCrNiO p Tb q TiY m Zr, wherein x is more than or equal to 0.1 and less than or equal to 1.3; y is more than or equal to 0.1 and less than or equal to 1; p is more than or equal to 0.1 and less than or equal to 0.5; q is more than or equal to 0.1 and less than or equal to 1; m is more than or equal to 0.1 and less than or equal to 1;0.01<x/(x+y+m+p+q+5)<0.25；0.01<y/(x+y+m+p+q+5)<0.20；0.01<p/(x+y+m+p+q+5)<0.10；0.01<q/(x+y+m+p+q+5)<0.20；0.01<m/(x+y+m+p+q+5)<0.20, respectively weighing the required pure metal powderAdding a proper amount of cerium dioxide according to the proportion of oxygen element, and mixing the raw material powder in a mixer after placing the raw material powder in a mixing tank;
(2) Putting the mixed powder into a graphite mould in a protective gas environment, and sintering the mixed powder into blocks at a high temperature in a vacuum high-temperature furnace;
(3) Placing the block in the step (2) in an induction extrusion furnace, carrying out induction heating to a preset temperature in a protective gas environment, rapidly placing a sample in a bidirectional jacking mold, and carrying out extrusion forming to obtain Al x Ce y CoCrNiO p Tb q TiY m A Zr compound block target;
(4) Sand blasting a workpiece to be coated, clamping the workpiece in a cavity of coating equipment, vacuumizing to below 0.1Pa, heating a furnace body until the temperature in the furnace reaches 500 ℃, introducing nitrogen into the furnace to increase the pressure to 2.5Pa, opening Al x Ce y CoCrNiO p Tb q TiY m Zr compound target material deposited on the surface of the workpiece and generating gradient (Al) in situ x Ce y CoCrNiO p Tb q TiY m Zr) N compound plating.
In the step (1), the purity of the metal powder is higher than 99.5%, and the purity of the cerium dioxide is higher than 99.9%.
The material mixing process in the step (1) comprises the following steps: the time is 0.5h to 12h, and the rotating speed is 30rpm to 80rpm.
And (3) the protective gas in the step (2) and the step (3) is argon or nitrogen.
The high-temperature sintering process in the step (2) comprises the following steps: the temperature is 1400-1800 ℃, and the heat preservation time is 2-8 h.
The induction extrusion process in the step (3) comprises the following steps: the preset temperature of induction heating is 900-1100 ℃, and the extrusion pressure is 30-40 MPa.
And (5) in the step (4), the material of the workpiece is 42CrMo.
The deposition process in the step (4) comprises the following steps: the bias voltage is 70V-150V, and the time is 90 min-120 min.
The invention has the beneficial effects that: (1) The invention adopts mechanical mixing, high-temperature sintering and induction heating extrusionThe process combining the press molding can fully crush and refine the defects of a small amount of oxide skin and the like existing on the surface layer of the raw material by mechanically mixing the materials, and the defects enter the raw material to play a role in dispersion strengthening of the oxide, and meanwhile, the raw material can generate more exposed fresh surfaces and finer particle distribution, so that the plasticity among the raw materials is improved, and the reaction activity is increased; the raw material powder is fully diffused through high-temperature sintering, so that the distribution of compound elements is more uniform, the structure is more regular, and the like; the density of the compound target material is further improved, the grain distribution size and range are reduced, the internal defects of the target material are reduced, and the comprehensive performance of the compound target material is further improved by induction heating extrusion forming; (2) Al prepared by the invention and having a three-phase structure composed of FCC (face-centered cubic structure, space group of Fm-3m (225), lattice constant of 1.111609 nm), HCP1 (close-packed hexagonal structure, space group of P63/mmc (194), lattice constant of a = b =0.515846nm, c = 0.831097nm) and HCP2 (close-packed hexagonal structure, space group of P63/mmc (194), lattice constant of a = b =0.785922nm, c = 0.779709nm) x Ce y CoCrNiO p Tb q TiY m The Zr compound target material has great variation range of atomic radius difference, atomic affinity and other elements, and may form low energy interface with relatively low mismatching degree on the surface of various base body to form gradient coating with self-regulated element distribution from inside to outside, so that it has high adaptability to various base bodies and high binding force x Ce y CoCrNiO p Tb q TiY m Zr) N compound coating, the hardness of the compound coating can reach 3300Hv at most, and the hardness and the wear resistance of the workpiece are obviously improved; (3) The coating prepared by the invention has high hardness, can obviously improve the wear resistance and the service life of the workpiece, is green and environment-friendly, and is suitable for industrial production.
Drawings
Fig. 1 is an X-ray diffraction pattern of a compound target used for the coating of the high-hardness, high-strength and wear-resistant compound prepared in example 1.
FIG. 2 is a metallographic photograph of a cross section of a coating layer of the high-hardness, high-strength wear-resistant compound prepared in example 1.
Detailed Description
The technical solution of the present invention is not limited to the embodiments listed below, and includes any combination of the embodiments.
Example 1
According to the chemical formula of compound target material AlCe 0.1 CoCrNiO 0.1 Tb 0.1 TiY 0.1 Respectively weighing 0.40mol of aluminum powder, cobalt powder, chromium powder, nickel powder, titanium powder and zirconium powder, 0.02mol of cerium powder and cerium dioxide, and 0.04mol of terbium powder and yttrium powder by using Zr, wherein the purity of each metal powder is higher than 99.5%, and the purity of the cerium dioxide is higher than 99.9%; placing the raw material powder into a mixing tank, and then mixing in a mixer, wherein the mixing time is 0.5h, and the rotating speed is 80rpm; putting the mixed powder into a graphite die in an argon environment, and sintering the mixed powder into blocks at a high temperature in a vacuum high-temperature furnace, wherein the sintering temperature is 1800 ℃ and the heat preservation time is 2 hours; placing the sintered block in an induction extrusion furnace, carrying out induction heating to a preset temperature of 900 ℃ in an argon environment, rapidly placing a sample in a bidirectional jacking mold, carrying out extrusion molding at an extrusion pressure of 40Mpa to obtain AlCe 0.1 CoCrNiO 0.1 Tb 0.1 TiY 0.1 A Zr compound block target; sand blasting 45CrMo workpiece to be coated, clamping the workpiece in a cavity of a coating device, vacuumizing to below 0.1Pa, heating a furnace body until the temperature in the furnace reaches 500 ℃, introducing nitrogen into the furnace to increase the pressure to 2.5Pa, starting AlCe 0.1 CoCrNiO 0.1 Tb 0.1 TiY 0.1 Zr compound target material with bias voltage of 150V and time of 90min is deposited on the surface layer of the workpiece and generates gradient (AlCe) in situ 0.1 CoCrNiO 0.1 Tb 0.1 TiY 0.1 Zr) N compound plating.
Example 2
According to the chemical formula Al of the compound target material 1.3 Ce 0.1 CoCrNiO 0.1 Tb 0.1 TiY 0.1 0.52mol of aluminum powder and 0.02mol of Zr are respectively weighedThe method comprises the following steps of (1) mixing cerium powder and cerium dioxide in mol, 0.40mol of cobalt powder, chromium powder, nickel powder, titanium powder and zirconium powder, and 0.04mol of terbium powder and yttrium powder, wherein the purity of each metal powder is higher than 99.5%, and the purity of cerium dioxide is higher than 99.9%; placing the raw material powder into a mixing tank, and then mixing in a mixer at the rotating speed of 50rpm for 6 h; putting the mixed powder into a graphite mold in an argon environment, sintering the mixed powder into blocks at a high temperature in a vacuum high-temperature furnace, wherein the sintering temperature is 1600 ℃, and preserving heat for 4 hours; placing the sintered block in an induction extrusion furnace, carrying out induction heating to a preset temperature of 1000 ℃ in an argon environment, rapidly placing a sample in a bidirectional jacking mold, carrying out extrusion molding at an extrusion pressure of 35Mpa to obtain Al 1.3 Ce 0.1 CoCrNiO 0.1 Tb 0.1 TiY 0.1 A Zr compound block target; carrying out sand blasting treatment on a 45CrMo workpiece needing to prepare a coating, clamping the workpiece in a cavity of coating equipment, vacuumizing to below 0.1Pa, heating a furnace body until the temperature in the furnace reaches 500 ℃, introducing nitrogen into the furnace to increase the pressure to 2.5Pa, starting Al 1.3 Ce 0.1 CoCrNiO 0.1 Tb 0.1 TiY 0.1 The Zr compound target material with the bias voltage of 140V and the time of 100min is deposited on the surface layer of the workpiece and generates gradient (Al) in situ 1.3 Ce 0.1 CoCrNiO 0.1 Tb 0.1 TiY 0.1 Zr) N compound plating.
Example 3
According to the chemical formula of compound target material AlCe 0.1 CoCrNiO 0.2 Tb 0.1 TiY 0.1 Respectively weighing 0.40mol of aluminum powder, cobalt powder, chromium powder, nickel powder, titanium powder and zirconium powder, and 0.04mol of cerium dioxide, terbium powder and yttrium powder by using Zr, wherein the purity of each metal powder is higher than 99.5%, and the purity of the cerium dioxide is higher than 99.9%; placing the raw material powder into a mixing tank, and then mixing in a mixer at the rotating speed of 30rpm for 12 h; putting the mixed powder into a graphite mold in an argon environment, sintering the mixed powder into blocks at a high temperature in a vacuum high-temperature furnace, wherein the sintering temperature is 1400 ℃, and preserving heat for 8 hours; placing the sintered block in an induction extrusion furnace, carrying out induction heating to the preset temperature of 1100 ℃ in an argon environment, and then rapidly placing the sample in a bidirectional top pressing dieExtruding and forming at 30MPa to obtain AlCe 0.1 CoCrNiO 0.2 Tb 0.1 TiY 0.1 A Zr compound block target; sand blasting 45CrMo workpiece to be coated, clamping the workpiece in a cavity of a coating device, vacuumizing to below 0.1Pa, heating a furnace body until the temperature in the furnace reaches 500 ℃, introducing nitrogen into the furnace to increase the pressure to 2.5Pa, starting AlCe 0.1 CoCrNiO 0.2 Tb 0.1 TiY 0.1 Zr compound target material with bias voltage of 110V and time of 110min is deposited on the surface layer of the workpiece and generates gradient (AlCe) in situ 0.1 CoCrNiO 0.2 Tb 0.1 TiY 0.1 Zr) N compound plating.
Example 4
According to the chemical formula of compound target material Al 0.1 CeCoCrNiO 0.5 Tb 0.1 TiY 0.1 Respectively weighing 0.04mol of aluminum powder, terbium powder and yttrium powder, 0.40mol of cobalt powder, chromium powder, nickel powder, titanium powder and zirconium powder, 0.30mol of cerium powder and 0.10mol of cerium dioxide by using Zr, wherein the purity of each metal powder is higher than 99.5 percent, and the purity of the cerium dioxide is higher than 99.9 percent; placing the raw material powder into a mixing tank, and then mixing in a mixer for 12h at the rotating speed of 30rpm; putting the mixed powder into a graphite mold in an argon environment, sintering the mixed powder into blocks at a high temperature in a vacuum high-temperature furnace, wherein the sintering temperature is 1400 ℃, and preserving heat for 8 hours; placing the sintered block in an induction extrusion furnace, carrying out induction heating to a preset temperature of 1100 ℃ in an argon environment, rapidly placing a sample in a bidirectional jacking mold, carrying out extrusion molding at an extrusion pressure of 30Mpa to obtain Al 0.1 CeCoCrNiO 0.5 Tb 0.1 TiY 0.1 A Zr compound block target; sand blasting 45CrMo workpiece to be coated, clamping the workpiece in a coating equipment cavity, vacuumizing to below 0.1Pa, heating furnace body to 500 deg.C, introducing nitrogen gas into the furnace to raise pressure to 2.5Pa, opening Al 0.1 CeCoCrNiO 0.5 Tb 0.1 TiY 0.1 The Zr compound target material is biased at 70V for 120min, and is deposited on the surface layer of the workpiece to generate gradient (Al) in situ 0.1 CeCoCrNiO 0.5 Tb 0.1 TiY 0.1 Zr) N compound coating.
Example 5
According to the chemical formula of compound target material AlCe 0.1 CoCrNiO 0.1 TbTiY 0.1 Respectively weighing 0.40mol of aluminum powder, cobalt powder, chromium powder, nickel powder, titanium powder, zirconium powder and terbium powder, 0.02mol of cerium powder, 0.04mol of cerium dioxide and 0.04mol of yttrium powder by using Zr, wherein the purity of each metal powder is higher than 99.5 percent, and the purity of the cerium dioxide is higher than 99.9 percent; placing the raw material powder into a mixing tank, and then mixing in a mixer at the rotating speed of 50rpm for 6 h; putting the mixed powder into a graphite mold in an argon environment, sintering the mixed powder into blocks at a high temperature in a vacuum high-temperature furnace, wherein the sintering temperature is 1600 ℃, and preserving heat for 4 hours; placing the sintered block in an induction extrusion furnace, carrying out induction heating to a preset temperature of 1000 ℃ in an argon environment, rapidly placing a sample in a bidirectional jacking mold, carrying out extrusion molding at an extrusion pressure of 35Mpa to obtain AlCe 0.1 CoCrNiO 0.1 TbTiY 0.1 A Zr compound block target; sand blasting 45CrMo workpiece to be coated, clamping the workpiece in a cavity of a coating device, vacuumizing to below 0.1Pa, heating a furnace body until the temperature in the furnace reaches 500 ℃, introducing nitrogen into the furnace to increase the pressure to 2.5Pa, starting AlCe 0.1 CoCrNiO 0.1 TbTiY 0.1 The Zr compound target material is biased at 150V for 90min, and is deposited on the surface layer of the workpiece to generate gradient (AlCe) 0.1 CoCrNiO 0.1 TbTiY 0.1 Zr) N compound coating.
Example 6
According to the chemical formula of compound target material AlCe 0.1 CoCrNiO 0.1 Tb 0.1 Respectively weighing 0.40mol of aluminum powder, cobalt powder, chromium powder, nickel powder, titanium powder, zirconium powder and yttrium powder, 0.02mol of cerium powder, 0.04mol of cerium dioxide and 0.04mol of terbium powder by TiYZr, wherein the purity of each metal powder is higher than 99.5 percent, and the purity of the cerium dioxide is higher than 99.9 percent; placing the raw material powder into a mixing tank, and then mixing in a mixer, wherein the mixing time is 0.5h, and the rotating speed is 80rpm; putting the mixed powder into a graphite mold in an argon environment, sintering the mixed powder into blocks at a high temperature of 1800 ℃ in a vacuum high-temperature furnace, and preserving the heat for 2 hours(ii) a Placing the sintered block in an induction extrusion furnace, carrying out induction heating to a preset temperature of 900 ℃ in an argon environment, rapidly placing a sample in a bidirectional jacking mold, carrying out extrusion molding at an extrusion pressure of 40Mpa to obtain AlCe 0.1 CoCrNiO 0.1 Tb 0.1 A TiYZr compound block target material; sand blasting 45CrMo workpiece to be coated, clamping the workpiece in a cavity of a coating device, vacuumizing to below 0.1Pa, heating a furnace body until the temperature in the furnace reaches 500 ℃, introducing nitrogen into the furnace to increase the pressure to 2.5Pa, starting AlCe 0.1 CoCrNiO 0.1 Tb 0.1 The TiYZr compound target material is biased at 140V for 100min, and is deposited on the surface layer of the workpiece to generate gradient (AlCe) 0.1 CoCrNiO 0.1 Tb 0.1 TiYZr) N compound plating.
Example 7
According to the chemical formula of compound target material Al 0.5 Ce 0.5 CoCrNiO 0.1 Tb 0.5 TiY 0.5 Respectively weighing 0.20mol of aluminum powder, terbium powder and yttrium powder, 0.18mol of cerium powder, 0.02mol of cerium dioxide, 0.40mol of cobalt powder, chromium powder, nickel powder, titanium powder and zirconium powder by using Zr, wherein the purity of each metal powder is higher than 99.5%, and the purity of cerium dioxide is higher than 99.9%; placing the raw material powder into a mixing tank, and then mixing in a mixer at the rotating speed of 50rpm for 6 h; putting the mixed powder into a graphite mold in a nitrogen environment, sintering the mixed powder into blocks at a high temperature in a vacuum high-temperature furnace, wherein the sintering temperature is 1800 ℃, and keeping the temperature for 2 hours; placing the sintered block in an induction extrusion furnace, carrying out induction heating to a preset temperature of 1000 ℃ in a nitrogen environment, then rapidly placing a sample in a bidirectional jacking mold, carrying out extrusion molding, wherein the extrusion pressure is 35Mpa, and obtaining Al 0.5 Ce 0.5 CoCrNiO 0.1 Tb 0.5 TiY 0.5 A Zr compound block target; carrying out sand blasting treatment on a 45CrMo workpiece needing to prepare a coating, clamping the workpiece in a cavity of coating equipment, vacuumizing to below 0.1Pa, heating a furnace body until the temperature in the furnace reaches 500 ℃, introducing nitrogen into the furnace to increase the pressure to 2.5Pa, starting Al 0.5 Ce 0.5 CoCrNiO 0.1 Tb 0.5 TiY 0.5 Zr compoundThe target material is biased at 70V for 120min, and is deposited on the surface layer of the workpiece to generate gradient (Al) in situ 0.5 Ce 0.5 CoCrNiO 0.1 Tb 0.5 TiY 0.5 Zr) N compound plating.
Claims (8)
1. The preparation method of the high-hardness high-strength wear-resistant compound coating is characterized in that the compound coating is (Al) x Ce y CoCrNiO p Tb q TiY m Zr) N, wherein x is more than or equal to 0.1 and less than or equal to 1.3; y is more than or equal to 0.1 and less than or equal to 1; p is more than or equal to 0.1 and less than or equal to 0.5; q is more than or equal to 0.1 and less than or equal to 1; m is more than or equal to 0.1 and less than or equal to 1;0.01<x/(x+y+m+p+q+5)<0.25；0.01<y/(x+y+m+p+q+5)<0.20； 0.01<p/(x+y+m+p+q+5)<0.10；0.01<q/(x+y+m+p+q+5)<0.20；0.01<m/(x+y+m+p+q+5) <0.20; and the target material used by the coating is Al with a three-phase structure of FCC, HCP1 and HCP2 x Ce y CoCrNiO p Tb q TiY m The Zr compound, wherein FCC is a face-centered cubic structure, the space group is Fm-3m (225), and the lattice constant is 1.111609nm; HCP1 is a hexagonal close packed structure with a space group of P63/mmc (194) with lattice constants a = b =0.515846nm, c =0.831097nm; HCP2 is a hexagonal close packed structure with space group P63/mmc (194) with lattice constants a = b =0.785922nm, c =0.779709nm; and the preparation method of the compound coating comprises the following steps:
(1) According to the chemical formula of compound target material Al x Ce y CoCrNiO p Tb q TiY m Zr, wherein x is more than or equal to 0.1 and less than or equal to 1.3; y is more than or equal to 0.1 and less than or equal to 1; p is more than or equal to 0.1 and less than or equal to 0.5; q is more than or equal to 0.1 and less than or equal to 1; m is more than or equal to 0.1 and less than or equal to 1;0.01<x/(x+y+m+p+q+5)<0.25；0.01<y/(x+y+m+p+q+5)<0.20； 0.01<p/(x+y+m+p+q+5)<0.10；0.01<q/(x+y+m+p+q+5)<0.20；0.01<m/(x+y+m+p+q+5) <0.20, respectively weighing the required pure metal powder and adding a proper amount of cerium dioxide according to the proportion of oxygen element, placing the raw material powder in a mixing tank, and mixing in a mixer;
(2) Putting the mixed powder into a graphite mould in a protective gas environment, and sintering the mixed powder into blocks at a high temperature in a vacuum high-temperature furnace;
(3) Putting the block in the step (2) into induction extrusionIn a furnace, under the environment of protective gas, induction heating is carried out to a preset temperature, then a sample is rapidly placed in a bidirectional jacking mould for extrusion forming, and Al is obtained x Ce y CoCrNiO p Tb q TiY m A Zr compound block target;
(4) Sand blasting a workpiece to be coated, clamping the workpiece in a cavity of coating equipment, vacuumizing to below 0.1Pa, heating a furnace body until the temperature in the furnace reaches 500 ℃, introducing nitrogen into the furnace to increase the pressure to 2.5Pa, opening Al x Ce y CoCrNiO p Tb q TiY m A Zr compound target material is deposited on the surface layer of the workpiece and generates gradient (Al) in situ x Ce y CoCrNiO p Tb q TiY m Zr) N compound plating.
2. The method of preparing a high-hardness, high-strength, abrasion-resistant compound coating according to claim 1, wherein: in the step (1), the purity of the metal powder is higher than 99.5%, and the purity of the cerium dioxide is higher than 99.9%.
3. The method of preparing a high-hardness, high-strength, abrasion-resistant compound coating according to claim 1, wherein: the material mixing process in the step (1) comprises the following steps: the time is 0.5h to 12h, and the rotating speed is 30rpm to 80rpm.
4. The method of preparing a high-hardness, high-strength, abrasion-resistant compound coating according to claim 1, wherein: and (3) the protective gas in the step (2) and the step (3) is argon or nitrogen.
5. The method of preparing a high-hardness, high-strength, abrasion-resistant compound coating according to claim 1, wherein: the high-temperature sintering process in the step (2) comprises the following steps: the temperature is 1400-1800 ℃, and the heat preservation time is 2h-8h.
6. The method of preparing a high-hardness, high-strength, abrasion-resistant compound coating according to claim 1, wherein: the induction extrusion process in the step (3) comprises the following steps: the preset temperature of induction heating is 900-1100 ℃, and the extrusion pressure is 30MPa-40MPa.
7. The method of preparing a high-hardness, high-strength, abrasion-resistant compound coating according to claim 1, wherein: and (4) the material of the workpiece in the step (4) is 42CrMo.
8. The method of preparing a high-hardness, high-strength, abrasion-resistant compound coating according to claim 1, wherein: the deposition process in the step (4) comprises the following steps: the bias voltage is 70V to 150V, and the time is 90min to 120min.
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