High-wear-resistance FeZr-ZTA micro-powder coated ZTA ceramic reinforced high-chromium cast iron matrix composite material, and preparation and application thereof

Abstract

The application discloses a kind of high wear-resistant FeZr-ZTA micro-powder coated ZTA ceramic reinforced high chromium cast iron matrix composite material and its preparation and application.The application first mixes Zr-Fe powder and ZTA micro-powder into mixed powder binder and wraps it on the surface of ZTA particle, then pre-sintering at 1000-1200 DEG C, after that, the pre-coated ZTA particle is mixed with the aforementioned binder to coat on the surface of pre-coated ZTA particle and obtain ZTA ceramic preform after pressureless sintering, finally, ZTA ceramic particle reinforced high chromium cast iron composite material is obtained by infiltration casting method.Through the bridge effect of FeZr-ZTA micro-powder coating layer, metallurgical bonding interface between ZTA and high chromium cast iron matrix can be formed, so that the prepared ZTA ceramic particle reinforced high chromium cast iron composite material has excellent three-body wear resistance.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of metal material processing, and particularly relates to a high-wear-resistance FeZr-ZTA micro-powder coated ZTA ceramic reinforced high-chromium cast iron-based composite material and a preparation method and application thereof. BACKGROUND

[0002] With the rapid development of modern industry, the consumption of wear-resistant metal materials is increasing day by day, but the traditional wear-resistant metal materials are difficult to meet the requirements of complex working conditions, and it is urgent to develop new wear-resistant metal materials with excellent wear resistance. Ceramic reinforced high-chromium cast iron-based composite material has high hardness, high specific strength, high wear resistance, high thermal stability and good toughness, plasticity and impact resistance of metal, and has a very broad application prospect as wear-resistant material, among which Zirconia toughened alumina (ZTA) reinforced high-chromium cast iron-based composite material is particularly concerned.

[0003] The addition of ceramic particles in ceramic particle reinforced high-chromium cast iron-based composite material is mainly to improve the wear resistance of high-chromium cast iron material. In the service process, the high-chromium cast iron body plays a supporting and fixing role for the ceramic particles, and with the wear of the high-chromium cast iron matrix, the ceramic particles protrude as the main wear-resistant phase, and the whole ceramic particles form a framework to reduce the further wear of the high-chromium cast iron body material. However, the wettability of ZTA ceramic particles and high-chromium cast iron body is very poor, so how to improve the interfacial bonding strength between ceramic particles and high-chromium cast iron to achieve metallurgical bonding is the key prerequisite for further wide application of the composite material.

[0004] The bonding mode of the interface between the ceramic particles and the metal directly determines the strength of the interface formed and the wear resistance of the composite material, and the bonding mode of the interface includes four modes of physical bonding, mechanical bonding, metallurgical bonding and mixed bonding, wherein the interface strength of the metallurgical bonding is the strongest. However, the bonding mode of the interface of the ceramic particle reinforced high chromium cast iron composite material at home and abroad at present is mainly mechanical bonding, and the metallurgical bonding has not been realized, which is mainly due to the poor wettability of the ceramic and the high chromium cast iron due to the completely different chemical properties, thermal expansion coefficients and other characteristics of the two, so that the interface between the ceramic particles and the high chromium cast iron is not bonded well. Therefore, how to improve the surface activity of ZTA ceramic and improve the wettability between it and the high chromium cast iron matrix to achieve metallurgical bonding and achieve excellent wear resistance has been the focus of research. The FeZr-ZTA micro powder coating ZTA ceramic particle surface activation treatment technology is developed for the first time, the wettability of the interface between the ceramic particles and the high chromium cast iron matrix is significantly improved, the metallurgical interface bonding between the ZTA ceramic and the high chromium cast iron matrix is realized, and the wear resistance of the prepared composite material is significantly improved. The invention can promote the industrial production and large-scale engineering application of the high wear-resistant ZTA reinforced high chromium cast iron matrix composite material, and is also suitable for developing alloy steel, high manganese steel and other iron-based composite materials, and has very important theoretical and engineering application value. SUMMARY

[0005] In order to solve the defects and deficiencies of the prior art, the primary purpose of the present application is to provide a FeZr-ZTA micro powder coated ZTA ceramic porous preform surface activation method.

[0006] Another purpose of the present application is to provide a FeZr-ZTA micro powder coated ZTA ceramic porous preform and its application.

[0007] Still another purpose of the present application is to provide a high wear-resistant FeZr-ZTA micro powder coated ZTA ceramic reinforced high chromium cast iron matrix composite material preparation method, which can realize metallurgical bonding between ZTA ceramic particles and high chromium cast iron matrix, and further significantly improve the overall wear resistance of the ZTA ceramic reinforced high chromium cast iron matrix composite material.

[0008] Still another purpose of the present application is to provide a high wear-resistant FeZr-ZTA micro powder coated ZTA ceramic reinforced high chromium cast iron matrix composite material and its application.

[0009] The purpose of the present application is achieved by the following technical solutions:

[0010] A FeZr-ZTA micro powder coated ZTA ceramic porous preform surface activation method, comprising the following steps:

[0011] (1) mixing Zr-Fe powder and ZTA micro powder by ball milling to obtain FeZr-ZTA mixed powder;

[0012] (2) mixing FeZr-ZTA mixed powder and anhydrous ethanol uniformly to obtain a slurry, then immersing the slurry into ZTA particles to make the slurry completely and uniformly coat the surface of the ZTA particles, taking out the ZTA particles and drying, and then pre-sintering at 800-950°C to obtain pre-coated ZTA particles;

[0013] (3) sintering the pre-coated ZTA particles at 1150-1550°C to obtain FeZr-ZTA micropowder coated ZTA ceramic porous preform.

[0014] Preferably, the particle size of the Zr-Fe powder in step (1) is ≤200 mesh.

[0015] Preferably, the mass percentage of Zr in the Zr-Fe powder in step (1) is 10-60%.

[0016] Preferably, the particle size of the ZTA micropowder in step (1) is 3-8 microns.

[0017] Preferably, the weight ratio of the Zr-Fe powder to the ZTA micropowder in step (1) is 3-6:2-5.

[0018] Preferably, the ball milling in step (1) is mechanical ball milling, the ball diameter of the milling ball is 5-10 mm, the weight ratio of the milling ball to the mixed powder is 5:1-10:1, the rotation speed is 300-450 r / min, and the ball milling time is 360-480 min.

[0019] Preferably, in step (2), the FeZr-ZTA mixed powder accounts for 20-27 wt.%, the anhydrous ethanol accounts for 20-25 wt.%, and the rest is ZTA particles.

[0020] Preferably, the average particle size of the ZTA particles in step (2) is 8-10 mesh.

[0021] Preferably, the drying in step (2) refers to drying under vacuum conditions at 50-100°C for 3-4 h, and the purpose is to remove the anhydrous ethanol in the particles.

[0022] Preferably, the pre-sintering time in step (2) is 45-60 min.

[0023] Preferably, the ball milling in step (1), the pre-sintering in step (2), and the pressureless sintering in step (3) are all carried out in an inert gas atmosphere, and the inert gas is at least one of argon, helium, and nitrogen.

[0024] Preferably, the pressureless sintering time in step (3) is 120-180 min.

[0025] The application provides a FeZr-ZTA micropowder coated ZTA ceramic porous preform obtained by the surface activation method.

[0026] The application provides application of the FeZr-ZTA micropowder coated ZTA ceramic porous preform in a metal or metal alloy based composite material.

[0027] Preferably, the application step comprises:

[0028] The FeZr-ZTA micropowder coated ZTA ceramic porous preform is fixed in a casting cavity, and a metal or metal alloy melt is cast into the cavity to obtain a ZTA ceramic particle reinforced metal or metal alloy based composite material.

[0029] Preferably, the metal alloy is an iron-based alloy, and more preferably, a high-chromium cast iron.

[0030] The application provides a preparation method of a high-wear-resistance FeZr-ZTA micropowder coated ZTA ceramic reinforced high-chromium cast iron based composite material, which comprises the following steps:

[0031] (1) mixing Zr-Fe powder and ZTA micropowder by ball milling to obtain FeZr-ZTA mixed powder;

[0032] (2) uniformly mixing the FeZr-ZTA mixed powder and anhydrous ethanol to obtain slurry, then immersing ZTA particles in the slurry to make the slurry completely and uniformly coat the surfaces of the ZTA particles, taking out the ZTA particles and drying, and then pre-sintering at 800-950 DEG C to obtain pre-coated ZTA particles;

[0033] (3) pressureless sintering the pre-coated ZTA particles at 1150-1550 DEG C to obtain a FeZr-ZTA micropowder coated ZTA ceramic porous preform;

[0034] (4) fixing the FeZr-ZTA micropowder coated ZTA ceramic porous preform in a casting cavity, and casting high-temperature high-chromium cast iron melt into the cavity to obtain a composite material with metallurgical bonding between the ZTA ceramic and the high-chromium cast iron matrix.

[0035] Preferably, the particle size of the Zr-Fe powder in step (1) is ≤200 mesh.

[0036] Preferably, the mass percentage of Zr in the Zr-Fe powder in step (1) is 10-60%.

[0037] Preferably, the particle size of the ZTA micropowder in step (1) is 3-8 microns.

[0038] Preferably, the weight ratio of the Zr-Fe powder to the ZTA micropowder in step (1) is 3-6:2-5.

[0039] Preferably, the ball milling in step (1) is mechanical ball milling, the ball diameter is 5-10mm, the weight ratio of ball to mixed powder is 5:1-10:1, the rotation speed is 300-450r / min, and the ball milling time is 360-480min.

[0040] Preferably, in step (2), the FeZr-ZTA mixed powder accounts for 20-27wt.%, the anhydrous ethanol accounts for 20-25wt.%, and the rest is ZTA particles.

[0041] Preferably, the particle size of the ZTA particles in step (2) is 8-10 mesh.

[0042] Preferably, the drying in step (2) is carried out at 50-100℃ under vacuum condition for 3-4h, so as to remove the anhydrous ethanol in the particles.

[0043] Preferably, the pre-sintering time in step (2) is 45-60min.

[0044] Preferably, the ball milling in step (1), the pre-sintering in step (2) and the pressureless sintering in step (3) are all carried out in an inert gas atmosphere, and the inert gas is at least one of argon, helium and nitrogen.

[0045] Preferably, the pressureless sintering time in step (3) is 120-180min.

[0046] Preferably, the pouring temperature of the high-chromium cast iron in step (4) is 1350±15℃-1450±20℃, and the tapping temperature of the high-chromium cast iron is 1500±20℃.

[0047] Preferably, the slag removal and deoxygenation treatment can be carried out before pouring in step (4).

[0048] The above-mentioned preparation method of the high-wear-resistance FeZr-ZTA micropowder coated ZTA ceramic reinforced high-chromium cast iron matrix composite material is a method for realizing the interfacial metallurgical bonding between the ZTA ceramic particles and the high-chromium cast iron matrix.

[0049] The application provides a high-wear-resistance FeZr-ZTA micropowder coated ZTA ceramic reinforced high-chromium cast iron matrix composite material prepared by the above-mentioned preparation method.

[0050] The application provides an application of the above-mentioned high-wear-resistance FeZr-ZTA micropowder coated ZTA ceramic reinforced high-chromium cast iron matrix composite material in mine machinery lining plate and other components.

[0051] The method of the present application can effectively improve the interface bonding characteristics between the ceramic and the metal, improve the wettability of the liquid metal on the ceramic surface, and realize metallurgical bonding between the metal liquid and the ceramic by surface modification of the ZTA ceramic with the FeZr-ZTA powder.

[0052] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0053] (1) The FeZr-ZTA powder as the surface activator of the ceramic particles can effectively improve the interface bonding characteristics between the ceramic and the metal, improve the wettability of the liquid metal on the ceramic surface, and improve the metallurgical bonding strength between the metal liquid and the ceramic.

[0054] (2) The raw materials used in the present application are directly sold on the market, which reduces the cost and is beneficial to large-scale industrial production. The preform is not subjected to pressing treatment before sintering, but is only naturally placed. It is this treatment that makes the preform present a loose and porous shape, which is beneficial to the filling of the high-chromium cast iron liquid between the ZTA particles.

[0055] (3) The technology has high universality and simple equipment requirements, and can be applied to the production and preparation of other component iron-based (such as high manganese steel, alloy steel matrix) composite materials. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 It is the physical map of the preform prepared in Example 1.

[0057] Figure 2 It is the SEM scanning diagram of the composite interface of the composite material prepared in Example 1 and the EDS energy spectrum line scanning spectrum diagram corresponding to the composite interface.

[0058] Figure 3 It is the high-magnification SEM diagram of the composite material interface prepared in Example 1. DETAILED DESCRIPTION

[0059] The present application will be further described in detail below in combination with the embodiments and the drawings, but the embodiments of the present application are not limited thereto.

[0060] In the embodiments of the present application, the specific conditions not specified are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The raw materials, reagents, etc. used without specifying the manufacturer are all conventional products that can be purchased on the market.

[0061] Example 1

[0062] (1) Take Zr powder and Fe powder (Zr-Fe powder, Zr mass percentage in Zr-Fe powder is 60%) with purity of about 99.99% and particle size of not more than 200 mesh and ZTA powder with particle size of 3 microns, mix the powders according to weight ratio Zr-Fe:ZTA 3:2, and perform mechanical ball milling mixing. Main mechanical alloying parameters: ball diameter: 10 mm, ball-to-material ratio 5:1, ball milling speed 400 r / min, ball milling time 480 min, to obtain FeZr-ZTA mixed powder.

[0063] To prevent the mixed powder after ball milling from increasing in surface area and being prone to reacting with oxygen in the air, the mixed powder is subjected to the whole mechanical ball milling mixing process in an inert gas (nitrogen) environment.

[0064] (2) Pour the FeZr-ZTA mixed powder (20 wt.%) obtained by ball milling in step (1) into a container, add 20 wt.% of anhydrous ethanol, and continuously stir until a thick slurry is formed. Then, immerse 60 wt.% of ZTA particles (average particle size 8 mesh) in the slurry, continuously stir to make the ZTA particles wrapped by the slurry, and then take out the ZTA particles and place them in a vacuum drying oven for drying for 4 h. Finally, place the dried ZTA particles in a furnace and heat to 800℃, and perform presintering treatment for 60 min. After the furnace is cooled to room temperature, the pre-coated ZTA particles are taken out. The whole sintering process is carried out in a nitrogen protective atmosphere.

[0065] (3) Put the coated ZTA particles in step (2) into a corundum mold with a height of 60 mm and a diameter of 50 mm, and sinter at 1150℃ for 180 min. After demolding, the required ZTA ceramic preform is obtained. To facilitate demolding, a layer of graphite paper with a thickness of about 0.5 mm can be placed in the mold. The whole sintering process is carried out in an inert gas (nitrogen) protective atmosphere.

[0066] (4) Traditional sand casting is used to prepare ZTA / HCCI composite material. The prepared ZTA ceramic preform is fixed in the middle of the mold cavity using a thick iron wire. The casting melt is selected as high chromium cast iron (HCCI). The temperature of molten iron out of the furnace is controlled at 1500±20℃, and the pouring temperature is controlled at 1450±20℃. Deslagging and deoxygenation treatment is performed before pouring.

[0067] The macroscopic view of the ZTA ceramic preform prepared in Example 1 is shown in Figure 1 ; Figure 2SEM scanning images of the ceramic particle reinforced high chromium cast iron composite material prepared in Example 1 and the corresponding EDS energy spectrum line scanning spectrum of the composite interface. From the figure, the formation of the transition layer can be clearly seen, and the EDS energy spectrum line scanning spectrum results show that the elements Cr and O continuously diffuse from the left high chromium cast iron matrix to the right, the content of these elements at the interface is not suddenly changed, but shows a gradual change trend, and composition diffusion phenomenon appears; it can be known from the figure that a metallurgical bonding interface is formed between ZTA and the high chromium cast iron matrix, and the interface is well combined. After three-body abrasive wear test, the test conditions are: the abrasive is 6# quartz sand, the main rotating speed of the abrasive wear tester is 30r / min, the single wear time is 30min (a total of 6 times, a total of 180min), the load is 30N, the radius of the ring-shaped steel rail is 180mm, each sample is subjected to three wear tests, and the average value is taken as the final result. The wear rate of the ZTA / HCCI composite material is only 0.53mm 3 ·min -1 .

[0068] Example 2

[0069] (1) Take Zr powder with a purity of about 99.99% and a particle size of not more than 200 mesh, Fe powder (the mass percentage of Zr in Zr-Fe powder is 10%) and ZTA powder with a particle size of 8 microns, mix the powders according to the weight ratio Zr-Fe:ZTA 6:5, and mechanically ball mill, the main mechanical alloying parameters are: ball diameter: 5mm, ball-to-material ratio 10:1, ball milling speed 300r / min, ball milling time 360min, to obtain FeZr-ZTA mixed powder.

[0070] In order to prevent the increase of the surface area of the mixed powder after ball milling, which is easy to react with oxygen in the air, the whole mechanical ball milling process is carried out in an inert gas (nitrogen) environment.

[0071] (2) Pour the FeZr-ZTA mixed powder (27wt.%) obtained by ball milling in step (1) into a container, add 25wt.% of anhydrous ethanol, and continuously stir until a thick slurry is formed. Then immerse 48wt.% of ZTA particles (average particle size of 10 mesh) in the slurry and continuously stir to make the ZTA particles wrapped by the slurry, then take out the ZTA particles and put them into a vacuum drying oven for drying for 4h. Finally, put the dried ZTA particles into a furnace and heat to 950℃, and pre-sinter for 60min. The furnace is cooled to room temperature and taken out, to obtain pre-coated ZTA particles. The whole sintering process is carried out in a nitrogen protective atmosphere.

[0072] (3) Put the coated ZTA particles of step (2) into a corundum mold with a height of 60 mm and a diameter of 50 mm, and sinter at 1550°C for 120 min without pressure, and after demolding, the desired ZTA ceramic preform is obtained. In order to facilitate demolding, a layer of graphite paper with a thickness of about 0.5 mm can be placed inside the mold, and the entire sintering process is carried out under inert gas (nitrogen) protection.

[0073] (4) The ZTA / HCCI composite material is prepared by traditional sand casting. The prepared ZTA ceramic preform is fixed in the middle of the mold cavity with a thick iron wire, and the molten metal is selected as high chromium cast iron (HCCI). The temperature of the molten iron out of the furnace is controlled at 1500±20°C, and the pouring temperature is controlled at 1350±15°C. Deslagging and deoxidizing treatment is used before pouring.

[0074] Figure 3 The SEM scanning image of the ceramic particle reinforced high chromium cast iron composite material prepared in Example 2. From the figure, it can be clearly seen that a transition metallurgical bonding interface is formed between the ZTA ceramic particles and the high chromium cast iron matrix, and the interface bonding is good. After three-body abrasive wear test, the test conditions are: abrasive is 6# quartz sand, main rotating speed of abrasive wear tester is 30r / min, single wear time is 30 min (total 6 times, total 180 min), load is 30N, and ring steel rail radius is 180mm. Each sample is tested for three times, and the average value is taken as the final result. The wear rate of ZTA / HCCI composite material is only 0.72mm 3 ·min -1 .

[0075] Example 3

[0076] (1) Take Zr powder with a purity of about 99.99% and a particle size of not more than 200 mesh, Fe powder (Zr accounts for 30% of the mass percentage in Zr-Fe powder) and ZTA powder with a particle size of 5 microns, and mix the powders according to the weight ratio of Zr-Fe:ZTA 4:5, and mechanically ball mill mixed, the main mechanical alloying parameters: ball diameter: 5mm, ball to material ratio 10:1, ball milling speed 300r / min, ball milling time 360min, to obtain FeZr-ZTA mixed powder.

[0077] In order to prevent the mixed powder after ball milling from increasing the surface area and easily reacting with oxygen in the air, the entire mechanical ball milling process is carried out in an inert gas (nitrogen) environment.

[0078] (2) The FeZr-ZTA mixed powder (25 wt.%) obtained by ball milling in step (1) is poured into a container, 20 wt.% of anhydrous ethanol is added, and stirring is continuously performed until a thick slurry is formed. Then, 45 wt.% of ZTA particles (average particle size of 8 mesh) are immersed in the slurry, and the ZTA particles are continuously stirred to be wrapped by the slurry. Then, the ZTA particles are taken out and dried in a vacuum drying oven for 4 h. Finally, the dried ZTA particles are heated to 850°C in a furnace, and pre-sintering treatment is performed for 45 min. The furnace is cooled to room temperature, and the pre-coated ZTA particles are taken out. The entire sintering process is performed under a nitrogen protective atmosphere.

[0079] (3) The coated ZTA particles obtained in step (2) are loaded into a corundum mold with a height of 60 mm and a diameter of 50 mm, and pressureless sintering is performed at 1450°C for 120 min. After demolding, the desired ZTA ceramic preform is obtained. In order to facilitate demolding, a layer of graphite paper with a thickness of about 0.5 mm can be placed in the mold. The entire sintering process is performed under an inert gas (nitrogen) protective atmosphere.

[0080] (4) The ZTA / HCCI composite material is prepared by traditional sand casting. The prepared ZTA ceramic preform is fixed in the middle of the mold cavity using a thick iron wire. The casting melt is high chromium cast iron (HCCI). The temperature of the molten iron out of the furnace is controlled at 1500±20°C, and the pouring temperature is controlled at 1400±15°C. Deslagging and deoxygenation treatment is performed before pouring.

[0081] After three-body abrasive wear testing, the test conditions are as follows: the abrasive is 6# quartz sand, the main rotating speed of the abrasive wear testing machine is 30 r / min, the single wear time is 30 min (a total of 6 times, a total of 180 min), the load is 30 N, the radius of the ring-shaped steel rail is 180 mm, each sample is subjected to three wear tests, and the average value is taken as the final result. The wear rate of the ZTA / HCCI composite material is only 0.65 mm 3 ·min -1 .

[0082] Comparative Example 1

[0083] (1) The ZTA particles without surface treatment are cleaned with alcohol and then dried in a vacuum drying oven. An appropriate amount of ZTA particles is weighed, and the ZTA and water glass binder (about 10% of the mass of the ZTA) are thoroughly stirred and uniformly mixed. Then, the mixed ZTA particles are pressed into a mold, and the preform together with the mold is placed in a drying oven at 70°C for 5 h. After drying, the formed ZTA ceramic preform is taken out. The size of the mold used is 40 mm x 60 mm, and a layer of graphite paper can be placed in the mold to facilitate demolding.

[0084] (3) The ZTA / HCCI composite material is prepared by traditional sand casting. The prepared ZTA ceramic preform is fixed in the middle of the cavity of the casting mold by a thick iron wire. The high chromium cast iron (HCCI) is selected as the casting melt. The temperature of the molten iron is controlled at 1350±15℃, and the pouring temperature is controlled at 1450±20℃. The slag and oxygen are removed before pouring.

[0085] A transition layer can be formed between the high chromium cast iron and the ZTA ceramic particles due to the introduction of the water glass, but there are many non-metallic salts and other impurities, and the interface bonding strength is low.

[0086] After the three-body abrasive wear test, the test conditions are as follows: the abrasive is 6# quartz sand, the main rotating speed of the abrasive wear tester is 30r / min, the single wear time is 30min (a total of 6 times, a total of 180min), the load is 30N, the radius of the ring-shaped steel rail is 180mm, each sample is subjected to three wear tests, and the average value is taken as the final result. The wear rate of the ZTA / HCCI composite material is 0.95mm 3 ·min -1 .

[0087] The three-body wear rate of the composite materials prepared in Examples 1-3 and Comparative Example 1 is shown in Table 1.

[0088]

[0089] As can be seen from Table 1, the wear resistance of the composite materials obtained in Examples 1-3 has certain differences, but is obviously better than that of the composite material prepared in Comparative Example 1.

[0090] The above examples are the preferred embodiments of the present application, but the embodiments of the present application are not limited by the above examples, and any changes, modifications, substitutions, combinations and simplifications made without departing from the spirit and principles of the present application should be equivalent replacement methods, and are all included in the protection scope of the present application.

Claims

1. A method for surface activation of FeZr-ZTA micro-powder-coated ZTA ceramic porous preforms, characterized in that, Includes the following steps: (1) Zr-Fe powder and ZTA micro powder were mixed by ball milling to obtain FeZr-ZTA mixed powder; (2) Mix FeZr-ZTA mixed powder and anhydrous ethanol evenly to obtain a slurry, then immerse it in ZTA particles so that the slurry completely and evenly coats the surface of ZTA particles. Take out the ZTA particles and dry them, then pre-sinter them at 800-950℃ to obtain pre-coated ZTA particles. (3) The pre-coated ZTA particles were sintered without pressure at 1150-1550℃ to obtain FeZr-ZTA micro powder coated ZTA ceramic porous preform; The Zr-Fe powder in step (1) has a Zr mass percentage of 10-60%; The weight ratio of Zr-Fe powder to ZTA micro powder in step (1) is 3-6:2-5; In step (2), by weight percentage, FeZr-ZTA mixed powder accounts for 20-27 wt.%, anhydrous ethanol accounts for 20-25 wt.%, and the remainder is ZTA particles; The particle size of the Zr-Fe powder in step (1) is ≤200 mesh; The particle size of the ZTA micro powder in step (1) is 3-8 micrometers; The ZTA particles in step (2) have an average particle size of 8-10 mesh. The ball milling in step (1) is a mechanical ball milling with a ball diameter of 5 to 10 mm, a weight ratio of the ball to the mixed powder of 5:1 to 10:1, a rotation speed of 300 to 450 r / min, and a milling time of 360 to 480 min; The pre-sintering time in step (2) is 45-60 min; The pressureless sintering time in step (3) is 120 to 180 min.

2. The method according to claim 1, characterized in that, The drying described in steps (2) and (3) refers to drying under vacuum conditions at 50-100°C for 3-4 hours; The ball milling mixing in step (1), the pre-sintering in step (2), and the pressureless sintering in step (3) are all carried out in an inert gas atmosphere, wherein the inert gas is at least one of argon, helium, and nitrogen.

3. A porous FeZr-ZTA ceramic preform coated with ZTA micropowder obtained by the method described in any one of claims 1 to 2.

4. The application of the FeZr-ZTA micro-powder-coated ZTA ceramic porous preform according to claim 3 in reinforced metal or metal alloy matrix composites, characterized in that, Achieving metallurgical bonding between ZTA ceramics and metal or metal alloy substrates.

5. A method for preparing a high-wear-resistant FeZr-ZTA micro-powder coated ZTA ceramic-reinforced high-chromium cast iron-based composite material, characterized in that, Includes the following steps: The FeZr-ZTA micro powder-coated ZTA ceramic porous preform described in claim 3 is fixed in the casting cavity, and high-chromium cast iron melt is cast into the cavity to obtain a composite material with interfacial metallurgical bonding between ZTA ceramic and high-chromium cast iron matrix. The casting temperature of the high-chromium cast iron melt is 1350±15℃~1450±20℃; the tapping temperature of the high-chromium cast iron melt is 1500±20℃.

6. A high wear-resistant FeZr-ZTA micro-powder coated ZTA ceramic-reinforced high-chromium cast iron-based composite material prepared by the preparation method described in claim 5.

7. The application of the high wear-resistant FeZr-ZTA micro-powder coated ZTA ceramic-reinforced high-chromium cast iron matrix composite material as described in claim 6 in mining machinery liner components.

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