CN110508807B - Application method of ceramic reinforced metal matrix composite material with optimized particle size - Google Patents
Application method of ceramic reinforced metal matrix composite material with optimized particle size Download PDFInfo
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- CN110508807B CN110508807B CN201910768399.0A CN201910768399A CN110508807B CN 110508807 B CN110508807 B CN 110508807B CN 201910768399 A CN201910768399 A CN 201910768399A CN 110508807 B CN110508807 B CN 110508807B
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
A use method of a ceramic reinforced metal matrix composite with optimized particle size belongs to the technical field of wear-resistant materials. Preparing a lining plate of high-wear-resistance crushing equipment or a roller sleeve of the high-wear-resistance crushing equipment by adopting a ceramic-reinforced metal-based composite material with an optimized particle size, wherein the ceramic-reinforced metal-based composite material with the optimized particle size comprises a metal matrix material and reinforced phase ceramic particles; the grain size of the reinforced phase ceramic grains is one of three ranges of 0.01-0.1 mu m, 0.1-1 mm and 1-5 mm, or the mixed grain size of several ranges; the ball mill lining plate, the roller sleeve and the high-pressure roller mill roller sleeve used in the high-severe environment are prepared by optimizing the distribution of particle sizes, and the wear resistance of the ball mill lining plate, the roller sleeve and the high-pressure roller mill roller sleeve is 2-10 times that of a traditional wear-resistant material; the high-wear-resistance crushing equipment lining plate or the high-wear-resistance crushing equipment roller sleeve prepared by the optimized grain size ceramic reinforced metal matrix composite can effectively adjust the thickness of a working area of the high-wear-resistance crushing equipment lining plate or the high-wear-resistance crushing equipment roller sleeve, so that wear-resistance work can be designed according to different use requirements.
Description
The application has the application number of 201810965885.7, application date of 2018, 08 and 23, and the invention name is as follows: the divisional application of the ceramic reinforced metal matrix composite material with optimized grain diameter, the preparation method and the application thereof.
Technical Field
The invention belongs to the technical field of wear-resistant materials, and particularly relates to a use method of a ceramic reinforced metal matrix composite material with an optimized particle size.
Background
Ceramic particle reinforced Metal Matrix Composite (MMC)S) The composite material has higher specific strength and specific rigidity than a base material, and has wide application prospect in the industries, national defense, transportation and other departments. With the continuous and intensive research on the particle-reinforced metal matrix composite material, the particle shape, the particle volume content, the matrix characteristics and the particle size can be found to have important influence on the preparation of the ceramic particle-reinforced iron-based alloy composite material. Wherein, the reinforcing particle size has obvious influence on the microscopic deformation mechanism, the strength and the fracture of the heterogeneous material system.On the one hand, the particle size has an important influence on the increase of the yield strength of the material and the improvement of the hardening behavior caused by the plastic deformation of the material; on the other hand, the fracture cracking of the particles and the combination of the particles and the matrix have holes, which finally cause the toughness of the material to be reduced. The particle reinforcement with the particle size ranging from 0.01 mu m to 0.1 mu m is strengthened due to the obstruction of the dislocation motion of the matrix by the particle reinforcement, and the strengthening mechanism belongs to dispersion strengthening. The particle reinforcement is mostly generated by in-situ reaction in the preparation process, and the precision requirement of the preparation process is higher; many studies are currently made on particle reinforcements with particle sizes of 0.1 μm to 1mm or more, and the particle reinforcements with such sizes are added into metals to play a role in improving wear resistance, heat resistance and elastic modulus. However, because the grain diameter is smaller, the interface surface between the ceramic grains and the matrix is easy to generate small, and when the matrix is abraded and concave, the whole grains are easy to fall off; at present, ceramic particles within the range of 1 mm-5 mm are rarely researched, and on one hand, because the wetting angle of most ceramic particles and a metal matrix is large, interface mechanical occlusion and hole defects are easy to occur in the preparation process, and the whole particles fall off in the use process; on one hand, the large ceramic particle reinforced metal matrix composite material is easy to generate brittle cracks in the preparation process or the use process, so that the fracture failure is caused, but the composite use mechanism effect of the large particles is more prominent because the large ceramic particle reinforced metal matrix composite material is used as a main wear-resistant phase.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a ceramic reinforced metal matrix composite with optimized particle size and a preparation method and application thereof. The composite material is prepared by adopting ceramic particles with optimized particle size range or mixed particle size through an external addition method or an in-situ reaction method. The preparation technology is a simple and flexible preparation process by virtue of reasonable reinforced phase grain size structural design, and the prepared ceramic reinforced metal matrix composite with the optimized grain size can be independently used as a wear-resistant part or used for preparing a prefabricated part of a lining plate and a roller sleeve of high-wear-resistance crushing equipment, and has excellent wear resistance, mechanical toughness and impact resistance.
The invention adopts the ceramic particle reinforced iron-based wear-resistant composite material with constant volume content and optimized particle size distribution, the ceramic particles with optimized particle size and metal alloy powder are placed in an alumina corundum crucible, and the composite material is prepared by adopting a liquid phase sintering method. In addition, the interface connection between the metal matrix material and the reinforcing phase is good, and the integral composite material shows excellent mechanical properties.
The invention relates to a ceramic reinforced metal matrix composite material with optimized particle size, which comprises a metal matrix material and reinforced phase ceramic particles; wherein, the volume percentage content of the reinforcing phase in the ceramic reinforced metal matrix composite material with the optimized grain diameter is 20-50 percent;
the grain size of the reinforced phase ceramic grains is one of three ranges of 0.01-0.1 mu m, 0.1-1 mm and 1-5 mm, or the mixed grain size of several ranges;
when the particle diameter of the reinforcing phase ceramic particles is a mixed particle diameter of several intervals, the particle diameter intervals are defined in the range of 0.1 mu m to 1mm and 1mm to 5mm, and the difference X between the particle diameters is set as: x is more than or equal to 0 mu m and less than or equal to 2.0mm, so that ceramic particles with small particle size are prevented from being consumed after large-particle-size particles and liquid phase are wetted for a long time in a high-temperature liquid phase region; a particle is free of constraints when it is formed in situ.
The reinforced phase ceramic particles are one or a mixture of oxide ceramic particles, carbide ceramic particles or nitride ceramic particles;
wherein the oxide ceramic particles are: white corundum particles, brown corundum particles or ZrO2-Al2O3(ZTA) one or more of particles;
the carbide ceramic particles are: WC particles, SiC particles, TiC particles, VC particles and B4C particles, Mo2C particles, ZrC particles or Cr3C2One or more of the particles;
the nitride ceramic particles are: si3N4Granules,One or more of BN particles, AlN particles or TiN particles.
The raw material of the metal matrix material is metal alloy powder;
the metal alloy powder comprises the following alloy components in percentage by mass: c:0 to 8.0% of Mo, 0 to 50% of Mn, 0 to 40% of Cr, 0 to 50% of V, 0 to 10% of Ti, 0 to 20% of Si, 0.1 to 4.0% of Ni, 0 to 15% of W, 0 to 5.0% of Nb, and the balance of Fe and unavoidable impurities, and has a particle size of 60 to 400 mesh.
According to the ceramic reinforced metal matrix composite material with the optimized particle size, the hardness of a metal matrix material is 900-1100 HV, the hardness of reinforced phase ceramic particles is 1400-2400 HV, and the interface hardness of the metal matrix material and the reinforced phase ceramic particles is 1100-1300 HV.
The preparation method of the ceramic reinforced metal matrix composite material with the optimized particle size comprises the following steps:
step 1: selecting and pretreating reinforced phase ceramic particles:
(1) weighing the enhanced-phase ceramic particles according to the prepared ceramic enhanced metal matrix composite material with the optimized particle size;
(2) removing impurities of the enhanced phase ceramic particles, and drying to obtain pretreated enhanced phase ceramic particles;
step 2: preparation of ceramic reinforced metal matrix composite material with optimized particle size
(1) Weighing raw materials according to the proportion, mixing the pretreated reinforced phase ceramic particles and the metal matrix material, and uniformly mixing to obtain a mixed material; wherein, according to the volume ratio, the pretreated reinforced phase ceramic particles are as follows: a metal base material which is 1 (2-5);
(2) putting the mixed materials into a compaction die, pressing by adopting the pressure of 200-300 MPa, and maintaining the pressure for 10-30 s to obtain a compacted ceramic reinforced block;
(3) and putting the compacted ceramic reinforced block into a crucible, putting the crucible into an atmosphere protection furnace, and presintering by adopting a programmed temperature control liquid phase sintering method to obtain the ceramic reinforced metal matrix composite material with the optimized particle size.
In the step 1(2), the reinforced phase ceramic particles adopt different cleaning modes according to different particle sizes and raw materials:
1) when the particle size of the enhanced phase ceramic particles is 1-5 mm, placing the enhanced phase ceramic particles into an acetone solution, placing the enhanced phase ceramic particles into ethanol for 6-12 hours, cleaning the enhanced phase ceramic particles, and placing ultrasonic waves for oscillation for 30-60 min;
2) when the particle size of the enhanced phase ceramic particles is 0.01-0.1 mu m or 0.1-1 mm, putting the enhanced phase ceramic particles into ethanol for cleaning, putting the enhanced phase ceramic particles into ultrasonic waves for oscillating for 30-40 min, then placing the enhanced phase ceramic particles into a centrifugal machine for centrifuging, setting the rotating speed of the centrifugal machine to be 6000-8000 r/min, removing solid sediment large-size particles, then adjusting the rotating speed of the centrifugal machine to be 10000-11500 r/min, and removing supernatant small-size particles to obtain middle-size ceramic particles;
3) the reinforced phase ceramic particles are synthesized in situ without cleaning.
In the step 1(2), the drying is carried out at the drying temperature of 80-200 ℃ for 3-8 h.
In the step 2(1), the powder mixing time is 1-4 h.
In the step 2(1), in the pressure applying process, when the pressure reaches 20-50 MPa, the pressure is maintained for 2-5 s, so that the gas in the mixed material can be discharged; after the preset pressure is reached, the pressure is maintained to ensure that the mixed material powder can be fully filled in the compaction die.
The shape of the ceramic reinforced metal matrix composite material with the optimized particle size prepared by the invention is preferably one of a cylinder, a hexagonal cylinder or a tetragonal body.
In the step 2(3), the temperature-programmed liquid phase sintering method specifically comprises: the atmosphere protection furnace is an oxygen-free atmosphere protection furnace, and the sintering process comprises the following steps: heating to 800-900 ℃ at the speed of 8-10 ℃/min, and preserving heat for 30-60 min; heating to 1350-1500 ℃ at the speed of 4-6 ℃/min, and preserving heat for 3-10 h; cooling to 1100-1260 ℃ at a speed of 2-4 ℃/min, and then cooling along with the furnace.
The argon atmosphere protection furnace is characterized in that the furnace is firstly vacuumized, and then one or more of nitrogen, argon, hydrogen or decomposed ammonia is introduced to form oxygen-free atmosphere protection.
The application of the ceramic reinforced metal matrix composite material with the optimized particle size is to prepare a lining plate of high-wear-resistance crushing equipment or a roller sleeve of the high-wear-resistance crushing equipment.
The high-wear-resistance crushing equipment lining plate or the high-wear-resistance crushing equipment roller sleeve comprises a ceramic reinforced metal matrix composite material with an optimized particle size and a casting material, wherein the casting material is high-wear-resistance alloy molten steel, and comprises the following chemical components in percentage by mass: 0.8 to 4.0% of C, 2.0 to 30% of Cr, 0.3 to 20% of Mn, 0 to 15% of V, 0 to 10% of Ni, 0 to 25% of W, 0 to 3% of Nb, 0 to 10% of Ti, 0 to 2% of Si, 0 to 0.02% of P, 0 to 0.01% of S, and the balance of Fe and inevitable impurities.
The application of the ceramic-reinforced metal-based composite material with the optimized particle size, disclosed by the invention, in preparing a lining plate of high-wear-resistance crushing equipment or a roller sleeve of the high-wear-resistance crushing equipment by adopting the prepared ceramic-reinforced metal-based composite material with the optimized particle size comprises the following steps of:
the method comprises the following steps: preparation of Sand molds
Setting a working area as a ceramic reinforced metal matrix composite with an optimized grain diameter according to the shape of a lining plate of high-wear-resistance crushing equipment or a roller sleeve of the high-wear-resistance crushing equipment to be prepared, and then preparing a sand mold according to the setting;
step two: putting the ceramic-reinforced metal matrix composite material with the optimized particle size into a sand mold, and drying the ceramic-reinforced metal matrix composite material with the optimized particle size and the sand mold together to obtain the dried ceramic-reinforced metal matrix composite material with the optimized particle size and the sand mold; wherein the drying temperature is 100-300 ℃, the heat preservation time is 10-20 h, and the heating rate is 2-5 ℃/min;
step three: smelting the high wear-resistant alloy at 1600-1700 ℃ to obtain high wear-resistant alloy molten steel; the high-wear-resistance alloy molten steel comprises the following chemical components in percentage by mass: 0.8 to 4.0 percent of C, 2.0 to 30 percent of Cr, 0.3 to 20 percent of Mn, 0 to 15 percent of V, 0 to 10 percent of Ni, 0 to 25 percent of W, 0 to 3 percent of Nb, 0 to 10 percent of Ti, 0 to 2 percent of Si, 0 to 0.02 percent of P, 0 to 0.01 percent of S, and the balance of Fe and inevitable impurities;
step four: and discharging the high-wear-resistant alloy molten steel, casting the high-wear-resistant alloy molten steel to a casting area in the dried ceramic reinforced metal matrix composite material with the optimized particle size and the sand mold by adopting gravity casting, wherein the casting temperature is 1500-1600 ℃, and performing sand removal treatment after casting to obtain a high-wear-resistant crushing equipment lining plate or a high-wear-resistant crushing equipment roller sleeve.
In the first step, the sand mold preparation process comprises the following steps: mixing the sand mould raw materials, adopting a prefabricated wood mould for moulding, filling carbon dioxide gas for curing after moulding is finished, taking out the wood mould after curing, and brushing a refractory coating on the inner surface of the sand mould;
the sand mold comprises the following raw materials in percentage by mass: clay: 8-14%, 5-10% of water and the balance of molding sand. The molding sand is one or a mixture of more of zircon sand, corundum sand and chromite sand; the fireproof coating is bauxite coating, and the thickness of the coating is 0.1-0.4 mm.
In the second step, the temperature rising rate is controlled in such a way that rapid temperature rising is avoided in the drying process, otherwise, deformation or cracking of the sand mold is easily caused; the preferable drying is step drying, specifically heating to 40-50 ℃, keeping the temperature for 1h, heating to 70-80 ℃, keeping the temperature for 1h, heating to 100-300 ℃, and keeping the temperature for 8-18 h.
In the third step, preferably, the smelting equipment is an electric arc furnace.
In the third step, the high wear-resistant alloy molten steel is used as a lining material of a lining plate of high wear-resistant crushing equipment or an inner wall material of a roller sleeve of the high wear-resistant crushing equipment, and is also used as a connecting material between ceramic reinforced metal matrix composite materials with optimized particle size.
And in the fourth step, before the high wear-resistant alloy steel molten steel is discharged from the furnace, a refining alterant is added to modify the high wear-resistant alloy steel molten steel.
More preferably, the ceramic reinforced metal matrix composite with the optimized particle size is subjected to heat treatment, or a lining plate of high-wear-resistance crushing equipment is subjected to heat treatment, or a roller sleeve of high-wear-resistance crushing equipment is subjected to heat treatment, and the heat treatment steps are as follows:
step I: annealing
Carrying out integral high-temperature diffusion annealing treatment on the ceramic-reinforced metal matrix composite material with the optimized particle size or the lining plate of the high-wear-resistant crushing equipment or the roller sleeve of the high-wear-resistant crushing equipment, and carrying out air cooling to obtain an annealed composite material, or the lining plate of the annealed high-wear-resistant crushing equipment or the roller sleeve of the annealed high-wear-resistant crushing equipment; wherein the annealing temperature is 1000-1300 ℃, and the annealing time is 8-10 h;
step II: quenching
Quenching the annealed ceramic reinforced metal matrix composite with the optimized particle size, or the annealed high-wear-resistance crushing equipment lining plate, or the annealed high-wear-resistance crushing equipment roller sleeve to obtain a quenched composite material, or the quenched high-wear-resistance crushing equipment lining plate, or the quenched high-wear-resistance crushing equipment roller sleeve; wherein the quenching temperature is 850-1100 ℃, and the temperature is kept for 9-12 h;
step III: tempering
Tempering the quenched ceramic-reinforced metal-based composite material with the optimized particle size, or the quenched high-wear-resistance crushing equipment lining plate, or the quenched high-wear-resistance crushing equipment roller sleeve to obtain the heat-treated ceramic-reinforced metal-based composite material with the optimized particle size, or the high-wear-resistance crushing equipment lining plate, or the high-wear-resistance crushing equipment roller sleeve; wherein the tempering temperature is 350-550 ℃, and the temperature is kept for 9-12 h.
In the lining plate of the high-wear-resistance crushing equipment or the roller sleeve of the high-wear-resistance crushing equipment prepared by the invention, the metal alloy components contained in the casting area and the mass percentages of the components are as follows: 0.8 to 4.0% of C, 2.0 to 30% of Cr, 0.3 to 20% of Mn, 0 to 15% of V, 0 to 10% of Ni, 0 to 25% of W, 0 to 3% of Nb, 0 to 10% of Ti, 0 to 2% of Si, 0 to 0.02% of P, 0 to 0.01% of S, and the balance of Fe and inevitable impurities.
According to the high-wear-resistance crushing equipment lining plate or the high-wear-resistance crushing equipment roller sleeve prepared by the invention, the hardness of the high-wear-resistance alloy in the casting area is more than or equal to 850HV, and preferably 850-1000 HV.
The impact toughness of the lining plate of the high-wear-resistance crushing equipment or the roller sleeve of the high-wear-resistance crushing equipment prepared by the invention is more than or equal to 5.5J/cm2Preferably 5.5 to 6.2J/cm2Shear strength is more than or equal to 530MPa is preferably 530 to 580 MPa.
Tests show that the hardness of the matrix of the ceramic reinforced metal matrix composite material with the optimized particle size prepared by the method is more than or equal to 900HV, the interface hardness of the metal matrix material and the ceramic particles is more than or equal to 1100HV, and the hardness of the ceramic particles is more than or equal to 1400 HV.
In the ceramic reinforced metal matrix composite material with the optimized particle size, the interface of the ceramic particles and the metal matrix material is obviously metallurgically bonded, cracks are not found after the integral heat treatment, and the high-wear-resistance metal ceramic composite material meets the use conditions in the field of wear-resistant materials.
Compared with the prior art, the application method of the ceramic reinforced metal matrix composite material with the optimized particle size has the following characteristics:
(1) the preparation method for the ceramic reinforced metal matrix composite material with the optimized particle size has the advantages of simple process, easy operation and convenience for industrial large-scale production;
(2) the particle size of the enhanced phase ceramic particles in the ceramic-enhanced metal matrix composite material with the optimized particle size prepared by the invention is in the whole range of 0.01-5 mm, wherein the ceramic enhanced phase with the particle size of 0.01-0.1 μm can be prepared by an in-situ generation method, the enhancement is generated due to the obstruction of a particle enhanced body to the dislocation motion of a matrix, and the enhancement mechanism belongs to Orowan enhancement; the ceramic reinforcing phase with the grain diameter of 0.1 mu m-1 mm can adopt an external addition method or an in-situ generation method, and the ceramic grains in the size range are added into the metal matrix to improve the functions of integral wear resistance, heat resistance and elastic modulus; the ceramic particles with the particle size of 1 mm-5 mm are difficult to be compounded with the matrix, and the specific alloy elements are added into the matrix, and a high-temperature long-time heat-preservation liquid phase sintering process is adopted, so that a diffusion composite layer with the thickness of 50-100 mu m appears on the interface of the ceramic particles, and the metallurgical bonding effect is achieved; the research on the mixed particle size is less at present, the ceramic particles with the particle size of 1 mm-5 mm and 0.1 mu m-1 mm are mixed to reinforce the matrix, the ceramic particles with the particle size of 1 mm-5 mm effectively improve the integral wear resistance, and the ceramic particles with the particle size of 0.1 mu m-1 mm are matched with the wear resistance of the wear-resistant phase through the dispersion strengthening matrix effect;
(3) the ball mill lining plate, the roller sleeve and the high-pressure roller mill roller sleeve used in the high-severe environment are prepared by optimizing the distribution of particle sizes, and the wear resistance of the ball mill lining plate, the roller sleeve and the high-pressure roller mill roller sleeve is 2-10 times that of the traditional wear-resistant material;
(4) the interface of the ceramic-reinforced metal-based composite material with the optimized particle size prepared by the liquid-phase sintering method is metallurgically bonded, and after the integral heat treatment, the mechanical property and the impact toughness of a lining plate of high-wear-resistant crushing equipment or a roller sleeve of the high-wear-resistant crushing equipment, which are prepared by the ceramic-reinforced metal-based composite material with the optimized particle size, are improved;
(5) the high-wear-resistance crushing equipment lining plate or the high-wear-resistance crushing equipment roller sleeve prepared from the ceramic reinforced metal matrix composite material with the optimized particle size can effectively adjust the thickness of a working area, so that wear-resistance work can be designed according to different use requirements.
(6) The reinforcing phases of the ceramic reinforced metal matrix composite with the optimized particle size are uniformly distributed, and various reinforcing mechanisms exist in the composite, so that the performance and service life of the material are greatly improved, and considerable economic benefits are brought to the application in the wear-resistant field.
Drawings
FIG. 1 is a tetragonal compacted ceramic reinforcing block of reinforcing particles having a particle size of 0.1 μm to 1mm and matrix powder according to example 1 of the present invention;
FIG. 2 is a cylindrical compacted ceramic reinforcing block of reinforcing particles ranging in size from 0.01 μm to 0.1 μm, 1mm to 5mm and matrix powder according to example 2 of the present invention;
FIG. 3 is a hexagonal cylindrical compacted ceramic reinforcing block of reinforcing particles ranging in size from 0.1 μm to 1mm, 1mm to 5mm and matrix powder according to example 3 of the present invention;
FIG. 4 is a schematic structural diagram of a lining plate of a vertical mill prepared in embodiment 4 of the invention; wherein (a) is a front sectional view; (b) is a top view;
FIG. 5 is a schematic structural view of a vertical mill roll shell produced in example 5 of the present invention; (c) is a side sectional view; (d) is a front cross sectional view;
FIG. 6 is a composite SEM image of the reinforcement phase ceramic particles and the metal matrix material in the ceramic-reinforced metal matrix composite material with the optimized particle size prepared in example 3 of the invention;
fig. 7 is a composite electronic probe picture of the interface between the enhanced phase ceramic particles and the metal matrix material in the ceramic-enhanced metal matrix composite with the optimized particle size prepared in example 1 of the present invention;
FIG. 8 is an SEM image of the interface between the reinforcing phase ceramic particles and the metal matrix material in the ceramic-reinforced metal matrix composite with optimized particle size prepared in example 2 of the present invention;
fig. 9 is a block diagram of a preparation process flow of the ceramic reinforced metal matrix composite material with the optimized particle size, the preparation method and the application thereof in example 6 of the present invention.
Fig. 10 is a block diagram of a process flow of preparing the ceramic reinforced metal matrix composite material with the optimized particle size, the preparation method and the application thereof in example 7 of the present invention.
Fig. 11 is a block diagram of a process flow of preparing the ceramic reinforced metal matrix composite material with the optimized particle size, the method for preparing the same, and the application thereof in example 8 of the present invention.
In the attached drawings, 1-1 is 0.1-1 mm ceramic particles, 1-2 is metal matrix powder, 1-3 is a tetragonal compacted ceramic reinforced block, 2-1 is 1-5 mm ceramic particles, 2-2 is a mixture of 0.01-0.1 μm ceramic particles and a metal matrix material, 2-3 is a cylindrical compacted ceramic reinforced block, 3-1 is 0.1-1 mm ceramic particles, 3-2 is 1-5 mm ceramic particles, 3-3 is metal matrix powder, 3-4 is a hexagonal cylinder compacted ceramic reinforced block, 4-1 is a liner optimized particle size ceramic reinforced metal matrix composite, 4-2 is a liner casting area, 5-1 is a roller sleeve optimized particle size ceramic reinforced metal matrix composite, 5-2 is a roller sleeve casting area, and 5-3 is a casting area combining the high wear-resistant alloy of the roller sleeve and the ceramic reinforced metal matrix composite material with the optimized particle size.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
The ceramic reinforced metal-based composite material with the optimized particle size is used in a working area of a roller sleeve of a vertical mill, the roller sleeve of the vertical mill comprises a tetragonal ceramic particle reinforced metal-based composite material with the optimized particle size and a casting material, and the casting material is high-wear-resistant alloy powder; the thickness of the working area is 1/3 of the height of the roller sleeve of the integral vertical mill;
the tetragonal optimized ceramic particle reinforced metal matrix composite material is obtained by sintering a tetragonal compacted ceramic reinforced block body through a temperature-programmed liquid phase;
the tetragonal compacted ceramic reinforced block comprises a metal matrix material and reinforcing phase ceramic particles; wherein, the reinforced phase ceramic particles are 40 percent of the volume percentage of the tetragonal compacted ceramic reinforced block body; reinforcing phase ceramic particles are 1-1 of reinforcing particles with the diameter of 0.1 mu m to 1mm, metal matrix material is 1-2 of metal matrix powder, and the reinforcing particles with the diameter of 0.1 mu m to 1mm and the metal matrix powder 1-2 are compacted to obtain a tetragonal compacted ceramic reinforcing block 1-3;
the metal matrix material is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: c: 0.4%, Mn 0.6%, Ti 1%, W10%, Si 1.5%, and the balance Fe and unavoidable impurities;
the reinforced phase ceramic particles are SiC particles, and have the advantages of light weight, stable size, high hardness, small friction coefficient, high melting point, large elastic modulus, good wettability with molten steel and wetting angle smaller than 36 degrees.
The SiC particles have a particle size in the range of 0.1 μm to 1mm, and in this example, the average particle size is 750. mu.m.
A preparation method of a high-wear-resistance vertical mill roller sleeve specifically comprises the following steps:
(1) selecting SiC particles with the average particle size of 750 mu m;
(2) cleaning SiC particles in alcohol, placing the cleaned SiC particles in ultrasonic waves, oscillating the SiC particles for 30min, placing the SiC particles in a centrifugal machine, removing solid sediment large-size particles at the rotating speed of 6000r/min, adjusting the rotating speed of the centrifugal machine to 10000r/min, and removing supernatant small-size particles to obtain SiC particles with a middle size;
(3) and (3) putting the cleaned SiC ceramic particles into a drying furnace for drying, wherein the drying temperature is 80 ℃, and the drying time is 8 h.
Step 2: preparing the SiC ceramic particle reinforced metal matrix composite material:
(1) SiC ceramic particles according to a fixed volume ratio: weighing the ceramic particles and the metal alloy powder of the matrix, and putting the weighed metal alloy powder into a powder mixer for mixing for 4 hours to obtain a uniformly mixed material;
(2) putting the uniformly mixed materials into a cylindrical compaction die, pressing under the pressure of 200MPa, and maintaining the pressure for 10s to obtain a compacted ceramic reinforced block body with the size of 110mm multiplied by 70mm multiplied by 40mm, which is shown in figure 1;
(3) the compacted ceramic reinforcing block was placed in an alumina corundum crucible (120 mm. times.80 mm. times.70 mm) and then placed in an atmosphere protecting furnace, first evacuated and then purged with argon. Heating to 800 deg.C at a speed of 9 deg.C/min, and maintaining for 40 min; heating to 1400 ℃ at the speed of 5 ℃/min, and preserving heat for 3 h; cooling to 1200 ℃ at the speed of 3 ℃/min, and then cooling along with the furnace to obtain the ceramic reinforced metal matrix composite material with the optimized particle size.
And step 3: preparing a high-wear-resistance vertical mill roller sleeve:
(1) preparing a sand mold: zircon sand, chromite sand, clay and a proper amount of water are mixed, and the raw materials and the mass percentage of each raw material are as follows: 9% of clay, 6% of water and the balance of molding sand, wherein in the molding sand, the mass ratio of zircon sand: chromite sand 1: 1. And manufacturing a sand mold, wherein the sand mold is formed by adopting a prefabricated wood mold, carbon dioxide gas is filled for solidification, the wood mold is taken out, and bauxite refractory coating is brushed on the inner surface, and the thickness of the coating is 0.1 mm.
(2) And (3) placing the ceramic reinforced metal matrix composite material with the optimized particle size prepared in the step (2) into a designated position of a sand mold, placing the ceramic reinforced metal matrix composite material and the sand mold into a drying furnace for drying, firstly heating to 50 ℃, preserving heat for 1h, heating to 80 ℃, preserving heat for 1h, and performing stepped drying, wherein the heat preservation time is 10h when the temperature reaches 200 ℃, the rapid heating is avoided in the drying process, otherwise, the deformation or cracking of the sand mold is easily caused, and the heating speed is 5 ℃/min.
(3) Smelting the high wear-resistant alloy at 1600 ℃ to obtain high wear-resistant alloy molten steel, and discharging and casting; the high-wear-resistance alloy steel molten steel comprises the following chemical components in percentage by mass: 0.8% of C, 4% of Cr, 4% of Mn, 1% of V, 1% of Ni, 0.5% of Si, 0.02% of P, 0.01% of S, and the balance of Fe and inevitable impurities;
(4) after the high-wear-resistance alloy molten steel is discharged from the furnace, gravity casting is carried out to a casting area in the dried ceramic reinforced metal matrix composite material with the optimized grain diameter and the sand mold, the casting temperature is 1500 ℃, and sand removal treatment is carried out after casting to obtain a high-wear-resistance vertical mill roller sleeve;
step 4, integral heat treatment of the high-wear-resistance vertical mill roller sleeve:
(1) putting the cooled high-wear-resistance vertical mill roller sleeve into a high-temperature furnace for integral high-temperature diffusion annealing treatment, and air cooling; wherein the annealing temperature is 1200 ℃, and the annealing time is 10 hours;
(2) quenching the annealed high-wear-resistance vertical mill roller sleeve; wherein the quenching temperature is 900 ℃, and the temperature is kept for 12 h;
(3) tempering the quenched high-wear-resistance vertical mill roller sleeve; wherein the tempering temperature is 500 ℃ and the temperature is kept for 12 h.
In the high-wear-resistance vertical mill roller sleeve prepared by the process, silicon carbide particles are reserved on the surface of a steel base, and a SiC particle composite layer with uniform distribution is formed on the surface. The silicon carbide particles in the composite layer contacted with the water surface of the cast high-wear-resistance alloy steel are decomposed, the transition region is narrow, and simultaneously, graphite exists in the steel matrix around the SiC particles, which shows that the SiC particles are partially decomposed to enrich a large amount of carbon in the steel matrix around the SiC particles, and in addition, the carbon decomposed by the SiC is diffused into the liquid molten steel from the vicinity of the SiC particles, so that the steel matrix and the graphite are mainly organized in the transition region, and the transition region is compact, as shown in figure 7.
In the ceramic reinforced metal matrix composite material with the optimized particle size prepared by the process, the hardness of a matrix is 900HV, the hardness is 1600HV, and the interface hardness of the matrix and SiC particles is 1200 HV; the casting area hardness of the prepared high-wear-resistance vertical mill roller sleeve is 850HV, and the impact toughness of the high-wear-resistance vertical mill roller sleeve is 6.2J/cm2The shear strength was 530 MPa.
Example 2
The ceramic reinforced metal matrix composite material with the optimized particle size is used in a working area of a lining plate of a vertical mill, the lining plate of the vertical mill comprises a cylindrical optimized ceramic particle reinforced metal matrix composite material and a casting material, and the casting material is high-wear-resistant alloy powder; the thickness of the working area is 1/2 of the height of the lining plate of the integral vertical mill;
the cylinder optimized ceramic particle reinforced metal matrix composite material is obtained by performing programmed temperature control liquid phase sintering on a cylinder compacted ceramic reinforced block;
the cylindrical compacted ceramic reinforced block comprises a metal matrix material and reinforcing phase ceramic particles; wherein, the reinforced phase ceramic particles are 40 percent of the volume percentage of the cylinder compacted ceramic reinforced block body; the reinforced phase ceramic particles are 2-1 of ceramic particles with the diameter of 1 mm-5 mm, 0.01 mu m-0.1 mu m and metal matrix materials; wherein, ceramic particles with the diameter of 0.01-0.1 μm and metal matrix material form a mixture, ceramic particles with the diameter of 1-5 mm 2-1 are uniformly and respectively arranged in the mixture of ceramic particles with the diameter of 0.01-0.1 μm and metal matrix material 2-2 to form a cylinder compacted ceramic reinforced block 2-3;
the metal matrix material is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: c: 3.5%, Mo 20%, Mn 10%, Cr 10%, Ti 1%, Si 0.1%, Ni 2.0%, Nb: 0.8%, the balance being Fe and unavoidable impurities;
the reinforced phase ceramic particles are TiC particles and WC particles, the TiC particles have good corrosion resistance and high thermodynamic stability, and have good wettability with an iron alloy melt and thermodynamic compatibility with an iron alloy; the WC particles have higher hardness, and the wetting angle of the WC particles and the iron alloy is 0 degree;
the grain size range of the TiC grains is 0.1 mu m-1 mm, and the average grain size is 900 mu m in the embodiment; WC grains are 1 mm-5 mm, and the average grain diameter is 3mm in the embodiment;
a preparation method of a high-wear-resistance vertical mill lining plate specifically comprises the following steps:
(1) selecting TiC particles with the average particle size of 900 mu m and WC particles with the average particle size of 3 mm;
(2) putting TiC particles into alcohol, cleaning, putting the TiC particles into ultrasonic waves, oscillating for 40min, putting the TiC particles into a centrifugal machine, removing solid sediment large-size particles at the rotating speed of 8000r/min, adjusting the rotating speed of the centrifugal machine to 11000r/min, and removing supernatant small-size particles to obtain TiC particles with a middle size; placing WC ceramic particles into an acetone solution for standing for 6h, then placing the ceramic particles into an alcohol solution for cleaning, and then placing the ceramic particles into ultrasonic waves for oscillating for 60 min.
(3) Putting the cleaned TiC ceramic particles into a drying furnace for drying, wherein the drying temperature is 100 ℃, and the drying time is 5.5 h; and (3) putting the cleaned WC ceramic particles into a drying furnace for drying at the drying temperature of 200 ℃ for 6 h.
Step 2: preparing a TiC + WC ceramic particle reinforced metal matrix composite material:
(1) ceramic particles of TiC + WC (50 wt.% each) in fixed volume ratios: weighing the ceramic particles and the metal alloy powder of the matrix, and putting the weighed metal alloy powder into a powder mixer for mixing for 4 hours to obtain a uniformly mixed material;
(2) putting the uniformly mixed materials into a square body compaction mould, pressing at the pressure of 300MPa, and maintaining the pressure for 20s to obtain a compacted ceramic reinforced block body, wherein the size of the compacted ceramic reinforced block body is a cylinder with phi 60mm multiplied by 80mm, and is shown in figure 2;
(3) the compacted ceramic reinforcing block is placed in an alumina corundum crucible (phi 80mm x 100mm) and then placed in an atmosphere protection furnace, first evacuated and then filled with argon. Heating to 850 deg.C at a speed of 9 deg.C/min, and maintaining for 30 min; heating to 1460 deg.C at a speed of 5 deg.C/min, and maintaining for 4 hr; cooling to 1260 ℃ at the speed of 3 ℃/min, and then cooling along with the furnace to obtain the ceramic reinforced metal matrix composite material with the optimized particle size.
Step 3, preparing a lining plate of the high-wear-resistance vertical mill:
(1) preparing a sand mold: zircon sand, corundum sand, clay and a proper amount of water are mixed, and the raw materials and the mass percentage of each raw material are as follows: 14% of clay, 10% of water and the balance of molding sand, wherein in the molding sand, the mass ratio of zircon sand: corundum sand is 1: 1. And manufacturing a sand mold, wherein the sand mold is formed by adopting a prefabricated wood mold, carbon dioxide gas is filled for solidification, the wood mold is taken out, and bauxite refractory coating is brushed on the inner surface, and the thickness of the coating is 0.2 mm.
(2) And (3) placing the ceramic reinforced metal matrix composite material with the optimized particle size prepared in the step (2) into a designated position of a sand mold, placing the ceramic reinforced metal matrix composite material and the sand mold into a drying furnace for drying, firstly heating to 50 ℃, preserving heat for 1h, heating to 80 ℃, preserving heat for 1h, and performing stepped drying, wherein the heat preservation time is 10h when the temperature reaches 300 ℃, the rapid heating is avoided in the drying process, otherwise, the deformation or cracking of the sand mold is easily caused, and the heating speed is 2 ℃/min.
(3) Smelting the high wear-resistant alloy at 1700 ℃ to obtain high wear-resistant alloy molten steel, and discharging and casting; the high-wear-resistance alloy steel molten steel comprises the following chemical components in percentage by mass: 2.0% of C, 30% of Cr, 5% of Mn, 1% of V, 10% of Ni, 1% of Nb, 2% of Si, 0.02% of P, 0.01% of S and the balance of Fe and inevitable impurities;
(4) after the high-wear-resistance alloy molten steel is discharged from the furnace, gravity casting is carried out to a casting area in the dried ceramic reinforced metal matrix composite material with the optimized grain diameter and the sand mold, the casting temperature is 1600 ℃, and sand removal treatment is carried out after casting to obtain a high-wear-resistance vertical mill lining plate;
step 4, integral heat treatment of the lining plate of the high-wear-resistance vertical mill:
(1) putting the cooled lining plate of the high-wear-resistance vertical mill into a high-temperature furnace for integral high-temperature diffusion annealing treatment, and air cooling; wherein the annealing temperature is 1150 ℃, and the annealing time is 8 hours;
(2) quenching the annealed high-wear-resistance vertical mill lining plate; wherein the quenching temperature is 850 ℃, and the temperature is kept for 9 h;
(3) tempering the quenched high-wear-resistance vertical mill lining plate; wherein the tempering temperature is 350 ℃ and the temperature is kept for 9 h.
The Mo element is added into the high-wear-resistance vertical mill lining plate prepared by the process, so that the wettability of TiC and Fe melt is improvedThe added trace rare earth element Nb improves the ductility of the composite material; in the embodiment, the composite material is prepared by adopting a programmed temperature control liquid phase sintering method, and the WC particles are in millimeter magnitude, so that the original hardness of the composite material is well kept after the composite material is prepared, and the wear resistance of the composite material is greatly improved. The interface recombination of the whole composite material is better, as shown in figure 8. The hardness of the matrix of the ceramic reinforced metal matrix composite material with the optimized grain size prepared by the process is 950HV, the hardness of TiC particles is 1400HV, the hardness of the interface between the TiC particles and the matrix is 1100HV, the hardness of the WC particles is 1800HV, and the hardness of the interface between the WC particles and the matrix is 1300 HV; the casting area hardness of the prepared high-wear-resistance vertical mill lining plate is 1000HV, and the impact toughness of the high-wear-resistance vertical mill lining plate is 5.9J/cm2The shear strength was 580 MPa.
Example 3
The ceramic reinforced metal-based composite material with the optimized particle size is used in a working area of a roller sleeve of a vertical mill, the roller sleeve of the vertical mill comprises a hexagonal cylinder ceramic particle reinforced metal-based composite material with the optimized particle size and a casting material, and the casting material is high-wear-resistant alloy powder; the thickness of the working area is 1/3 of the height of the roller sleeve of the integral vertical mill;
the hexagonal cylinder optimized ceramic particle reinforced metal matrix composite is obtained by sintering a hexagonal cylinder compacted ceramic reinforced block through a temperature-programmed liquid phase;
the hexagonal cylinder compacted ceramic reinforced block comprises a metal matrix material and reinforcing phase ceramic particles; wherein, the reinforced phase ceramic particles are 40 percent of the volume percentage of the ceramic reinforced block body compacted by hexagonal cylinders; the reinforcing phase ceramic particles are 3-1 of ceramic particles with the diameter of 0.1 mu m to 1mm, 3-2 of ceramic particles with the diameter of 1mm to 5mm and 3-3 of metal matrix powder, and the ceramic particles with the diameter of 0.1 mu m to 1mm, 3-2 of ceramic particles with the diameter of 1mm to 5mm and 3-3 of metal matrix powder are mixed and compacted to obtain a ceramic reinforcing block 3-4 compacted by a hexagonal cylinder;
the metal matrix material is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: c: 3.5%, 4% of Mo, 28% of Mn, 1% of Cr, 15% of Ni, 2% of Ti, 1.5% of Si, 1.0% of Nb and the balance of Fe and inevitable impurities;
the reinforcing phase ceramic particles are ZrO2-Al2O3(ZTA)+Cr3C2Particles of Cr of3C2The particles are high-melting-point materials with good wear resistance, corrosion resistance and oxidation resistance; ZrO (ZrO)2-Al2O3(ZTA) particles have a higher fracture toughness, since in Al2O3Into which nano-scale dispersed phase-change material ZrO is introduced2Using ZrO2Can make Al have toughening effect2O3The strength and the fracture toughness of the ceramic are greatly improved, thereby overcoming the defect of Al2O3Brittleness of the ceramic.
The Cr3C2The particle size of the particles ranges from 0.1 μm to 1mm, and the average particle size in this example is 300 μm; ZrO (ZrO)2-Al2O3(ZTA) has a particle size of 1mm to 5mm, in this example an average particle size of 1 mm;
a preparation method of a high-wear-resistance vertical mill roller sleeve specifically comprises the following steps:
(1) selecting Cr with the average grain diameter of 300 mu m3C2Particles and ZrO having an average particle diameter of 1mm2-Al2O3(ZTA) particles;
(2) mixing Cr3C2Cleaning the particles in alcohol, placing in ultrasonic wave, oscillating for 30min, placing in centrifuge at a rotation speed of 7500r/min, removing large-size particles of solid precipitate, adjusting the rotation speed of the centrifuge to 11500r/min, removing small-size particles of supernatant to obtain middle-size Cr3C2Particles; ZrO 2 is mixed with2-Al2O3(ZTA) the particles were placed in acetone solution for 12h, then the ceramic particles were washed in alcohol solution and then placed in ultrasonic waves and shaken for 60 min.
(3) Cleaning the cleaned Cr3C2Drying the granules in a drying furnace at the drying temperature of 120 ℃ for 6 hours; the cleaned ZrO2-Al2O3(ZTA) the granules are dried in a drying oven at a temperature ofThe drying time is 3h at 200 ℃.
Step 2: cr (chromium) component3C2Preparation of + ZTA ceramic particle reinforced metal matrix composite:
(1) at a fixed volume ratio of Cr3C2+ ZTA (50 wt.% each) ceramic particles: weighing the ceramic particles and the metal alloy powder of the matrix, putting the weighed metal alloy powder into a powder mixer, and mixing for 3 hours to obtain a uniformly mixed material;
(2) putting the uniformly mixed materials into a hexagonal cylinder compaction die, pressing under the pressure of 300MPa, and maintaining the pressure for 30s to obtain a compacted ceramic reinforced block body, wherein the size of the compacted ceramic reinforced block body is a hexagonal cylinder with the side length of 60mm and the height of 50mm, and is shown in figure 3;
(3) the compacted ceramic reinforcing block was placed in an alumina corundum crucible (120 mm. times.80 mm. times.70 mm) and then placed in an atmosphere protecting furnace, first evacuated and then purged with argon. Heating to 900 deg.C at a speed of 9 deg.C/min, and maintaining for 40 min; heating to 1500 ℃ at the speed of 5 ℃/min, and preserving heat for 4 h; cooling to 1200 ℃ at the speed of 3 ℃/min, and then cooling along with the furnace to obtain the ceramic reinforced metal matrix composite material with the optimized particle size.
And step 3: preparing a high-wear-resistance vertical mill roller sleeve:
(1) preparing a sand mold: zircon sand, corundum sand, clay and a proper amount of water are mixed, and the raw materials and the mass percentage of each raw material are as follows: 14% of clay, 10% of water and the balance of molding sand, wherein in the molding sand, the mass ratio of zircon sand: corundum sand is 1: 1. And manufacturing a sand mold, wherein the sand mold is formed by adopting a prefabricated wood mold, carbon dioxide gas is filled for solidification, the wood mold is taken out, and bauxite refractory coating is brushed on the inner surface, and the thickness of the coating is 0.3 mm.
(2) And (3) placing the ceramic reinforced metal matrix composite material with the optimized particle size prepared in the step (2) into a designated position of a sand mold, placing the ceramic reinforced metal matrix composite material and the sand mold into a drying furnace for drying, firstly heating to 40 ℃, preserving heat for 1h, heating to 70 ℃, preserving heat for 1h, and performing stepped drying, wherein the heat preservation time is 10h when the temperature reaches 100 ℃, the rapid heating is avoided in the drying process, otherwise, the deformation or cracking of the sand mold is easily caused, and the heating speed is 5 ℃/min.
(3) Smelting the high wear-resistant alloy at 1700 ℃ to obtain high wear-resistant alloy molten steel, and discharging and casting; the high-wear-resistance alloy steel molten steel comprises the following chemical components in percentage by mass: 4.0% of C, 2.0% of Cr, 0.3% of Mn, 1% of Ni, 3% of Nb, 10% of Ti, 0.02% of P, 0.01% of S and the balance of Fe and inevitable impurities;
(4) after the high wear-resistant alloy is discharged from the furnace, gravity casting is carried out to a casting area in the dried ceramic reinforced metal matrix composite material with the optimized grain diameter and the sand mold, the casting temperature is 1600 ℃, and sand removal treatment is carried out after casting to obtain the high wear-resistant vertical mill roller sleeve;
step 4, integral heat treatment of the high-wear-resistance vertical mill roller sleeve:
(1) putting the cooled high-wear-resistance vertical mill roller sleeve into a high-temperature furnace for integral high-temperature diffusion annealing treatment, and air cooling; wherein the annealing temperature is 1300 ℃, and the annealing time is 8 h;
(2) quenching the annealed high-wear-resistance vertical mill roller sleeve; wherein the quenching temperature is 1100 ℃, and the temperature is kept for 12 h;
(3) tempering the quenched high-wear-resistance vertical mill roller sleeve; wherein the tempering temperature is 550 ℃ and the temperature is kept for 12 h.
Mn and Ni alloy elements are added into the high-wear-resistance vertical mill roller sleeve prepared by the process, so that the wettability of ZTA ceramic particles and a matrix is improved, a diffusion layer is formed with the matrix in the long-time heat preservation process, the matrix and the ceramic particles are combined in a tooth shape, and gaps are hardly seen, as shown in figure 6. Cr (chromium) component3C2The particles are dispersed in the matrix and show higher hardness.
In the ceramic reinforced metal matrix composite material with the optimized grain diameter prepared by the process, the hardness of the matrix is 1100HV, the hardness of ZTA particles is 2400HV, the hardness of the ZTA particles and the matrix interface is 1300HV, and Cr is3C2The particle hardness is 1600HV, Cr3C2The interface hardness of the particles and the matrix is 1280 HV; in the high-wear-resistance vertical mill roller sleeve, the hardness of a casting area is 890HV, and the impact toughness of the high-wear-resistance vertical mill roller sleeve is 5.5J/cm2The shear strength is 575 MPa.
Example 4
The ceramic reinforced metal matrix composite material with the optimized grain size is used in a working area of a lining plate of a high-wear-resistance vertical mill, the lining plate of the high-wear-resistance vertical mill comprises a tetragonal ceramic particle reinforced metal matrix composite material with the optimized grain size and a casting material, and the casting material is high-wear-resistance alloy powder; the thickness of the working area is 1/3 of the height of the lining plate of the integral high-abrasion-resistance vertical mill;
the high wear-resistant vertical mill lining plate comprises: the optimized grain size of the lining plate is ceramic reinforced metal matrix composite 4-1, and the casting area of the lining plate is 4-2;
the ceramic reinforced metal matrix composite material with the optimized lining plate particle size comprises a metal matrix material and reinforcing phase ceramic particles; wherein, the reinforced phase ceramic particles are 40 percent of the volume percentage of the ceramic reinforced metal matrix composite material with the optimized particle size;
the metal matrix material is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: 40% of Mn, 1% of Ti, 1.5% of Si, 1.0% of Nb and the balance of Fe and inevitable impurities;
the reinforced phase ceramic particles are brown corundum particles, and are brown artificial corundum prepared by melting and reducing alumina, carbon materials and scrap iron in an electric arc furnace, wherein the main chemical component of the brown corundum is Al2O3The content is 95.0-97.0%, and a small amount of Fe, Si, Ti, etc. is also contained. The brown corundum is the most basic abrasive, and has wide application range and low price.
The particle size range of the brown corundum particles is 1-5 mm, and the average particle size is 3mm in the embodiment;
a preparation method of a high-wear-resistance vertical mill lining plate specifically comprises the following steps:
(1) selecting brown corundum particles with the average particle size of 3 mm;
(2) putting the brown corundum particles into an acetone solution, standing for 8 hours, putting the ceramic particles into an alcohol solution, cleaning, and then putting the ceramic particles into ultrasonic waves to vibrate for 30 min.
(3) And (3) putting the cleaned brown corundum particles into a drying furnace for drying, wherein the drying temperature is 200 ℃, and the drying time is 8 hours.
Step 2: preparing a brown corundum particle reinforced metal matrix composite material:
(1) brown corundum particles according to a fixed volume ratio: weighing ceramic particles and matrix powder, and putting the ceramic particles and the matrix powder into a powder mixer for mixing for 4 hours to obtain a uniformly mixed material;
(2) putting the uniformly mixed materials into a square compaction mould, keeping the pressure at 300MPa for 20s to obtain a compacted ceramic reinforced block body, wherein the size of the square body is 110mm multiplied by 70mm multiplied by 40 mm;
(3) the compacted ceramic reinforcing block was placed in an alumina corundum crucible (120 mm. times.80 mm. times.70 mm) and then placed in an atmosphere protecting furnace, first evacuated and then purged with argon. Heating to 850 deg.C at a speed of 9 deg.C/min, and maintaining for 60 min; heating to 1350 ℃ at the speed of 5 ℃/min, and preserving heat for 10 h; cooling to 1100 ℃ at the speed of 3 ℃/min, and then cooling along with the furnace to obtain the ceramic reinforced metal matrix composite material with the optimized particle size.
And step 3: preparing a high-wear-resistance vertical mill lining plate:
(1) preparing a sand mold: corundum sand, chromite sand, clay and a proper amount of water are mixed, and the raw materials and the mass percentage of each raw material are as follows: 8% of clay, 5% of water and the balance of molding sand, wherein in the molding sand, the mass ratio of corundum sand: chromite sand 1: 1. And manufacturing a sand mold, wherein the sand mold is formed by adopting a prefabricated wood mold, carbon dioxide gas is filled for solidification, the wood mold is taken out, and bauxite refractory coating is brushed on the inner surface, and the thickness of the coating is 0.1 mm.
(2) And (3) placing the ceramic reinforced metal matrix composite material with the optimized particle size prepared in the step (2) into a designated position of a sand mold, and then placing the ceramic reinforced metal matrix composite material and the sand mold into a drying furnace for drying, wherein the drying temperature is 100-300 ℃, the step-type drying is carried out, the heat preservation time is 11h, the rapid temperature rise is avoided in the drying process, otherwise, the deformation or the cracking of the sand mold is easily caused, and the temperature rise speed is 4 ℃/min.
(3) Smelting the high wear-resistant alloy at 1700 ℃ to obtain high wear-resistant alloy molten steel, and discharging and casting; the high-wear-resistance alloy steel molten steel comprises the following chemical components in percentage by mass: 1.0% of C, 2.0% of Cr, 0.3% of Mn, 10% of Ni, 0.02% of P, 0.01% of S and the balance of Fe and inevitable impurities;
(4) after the high-wear-resistance alloy molten steel is discharged from the furnace, gravity casting is carried out to a casting area in the dried ceramic reinforced metal matrix composite material with the optimized grain size and the sand mold, the casting temperature is 1600 ℃, sand removal treatment is carried out after casting, and the high-wear-resistance vertical mill lining plate is obtained, wherein the prepared high-wear-resistance vertical mill lining plate is shown in figure 4; wherein (a) is a front sectional view; (b) is a top view; from (a), it can be seen that the working zone thickness is 1/3 of the whole high abrasion resistant vertical mill liner thickness.
Step 4, integral heat treatment of the lining plate of the high-wear-resistance vertical mill:
(1) putting the cooled lining plate of the high-wear-resistance vertical mill into a high-temperature furnace for integral high-temperature diffusion annealing treatment, and air cooling; wherein the annealing temperature is 1150 ℃, and the annealing time is 10 hours;
(2) quenching the annealed high-wear-resistance vertical mill lining plate; wherein the quenching temperature is 1000 ℃, and the temperature is kept for 10 h;
(3) tempering the quenched high-wear-resistance vertical mill lining plate; wherein the tempering temperature is 500 ℃ and the temperature is kept for 10 h.
The high-wear-resistance vertical mill lining plate prepared by the process is added with a certain amount of ceramic micro powder particles, and the ceramic micro powder particles and the brown corundum particles form a glass phase interface in a high-temperature liquid phase region, so that the wettability of the brown corundum particles and the matrix is effectively improved, and meanwhile, the toughness of the high-wear-resistance vertical mill lining plate is further improved by adding Mn, Fe and other elements in the matrix. The integral high-wear-resistance vertical mill lining plate shows excellent combination of strength and toughness.
In the ceramic reinforced metal matrix composite material with the optimized particle size prepared by the process, the hardness of a matrix is 1000HV, the hardness of brown corundum particles is 1600HV, and the hardness of the interface between the brown corundum particles and the matrix is 1200 HV;
in the lining plate of the high-wear-resistance vertical mill, the hardness of a casting area is 860HV, and the impact toughness of the lining plate of the high-wear-resistance vertical mill is 5.5J/cm2The shear strength was 560 MPa.
Example 5
A ceramic reinforced metal matrix composite with optimized particle size is used in a working area of a high-wear-resistance vertical mill roller sleeve, the high-wear-resistance vertical mill roller sleeve comprises a cylindrical ceramic particle reinforced metal matrix composite and a casting material, and the casting material is high-wear-resistance alloy powder; the thickness of the working area is 1/3 of the height of the roller sleeve of the integral high-abrasion-resistance vertical mill;
the high-wear-resistance vertical mill roller sleeve comprises 5-1 parts of a roller sleeve optimized particle size ceramic reinforced metal matrix composite material, 5-2 parts of a roller sleeve casting area, and 5-3 parts of a roller sleeve high-wear-resistance alloy and optimized particle size ceramic reinforced metal matrix composite material combined casting area;
the roller sleeve optimized particle size ceramic reinforced metal matrix composite comprises a metal matrix material and reinforcing phase ceramic particles; the reinforced phase ceramic particles are 40 percent of the volume percentage of the ceramic reinforced metal matrix composite material with the optimized particle size;
the metal matrix material is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: c: 8%, 20% of Ti, 4.0% of Si, 10% of V, and the balance of Fe and inevitable impurities;
the reinforced phase ceramic particles are TiC and VC particles generated in situ in a matrix material, both the particles have a face-centered cubic structure, show physical and chemical properties of high melting point, high hardness and high brittleness, have good compatibility with an iron matrix, and are relatively ideal reinforced materials.
The particle size range of the reinforced particles is 0.1 mu m-1 mm, and the average particle size of the matrix powder of the in-situ synthesized reinforced particles is 50 mu m in the embodiment;
a preparation method of a high-wear-resistance vertical mill roller sleeve specifically comprises the following steps:
step 1: selecting and pretreating reinforced phase ceramic particles:
(1) selecting metal matrix powder with the average particle size of 50 mu m, and taking TiC particles and VC particles generated by the metal matrix powder as reinforced phase ceramic particles in the preparation process;
(2) the particles are synthesized in situ without cleaning.
Step 2: preparing a (Ti, V) C ceramic particle reinforced metal matrix composite material:
(1) putting the metal base material into a powder mixer to mix for 1h according to the mass percent of each alloy powder component in the metal base material to obtain a uniformly mixed material;
(2) putting the uniformly mixed materials into a cylinder compaction mould, pressing under the pressure of 200MPa, and maintaining the pressure for 10S to obtain a compacted ceramic reinforced block body which is a cylinder with the size of phi 60mm multiplied by 80 mm;
(3) the compacted ceramic reinforcing block is placed in an alumina corundum crucible (phi 80mm x 100mm) and then placed in an atmosphere protection furnace, first evacuated and then filled with argon. Heating to 850 deg.C at a speed of 9 deg.C/min, and maintaining for 60 min; heating to 1400 ℃ at the speed of 5 ℃/min, and preserving heat for 3 h; cooling to 1200 ℃ at the speed of 3 ℃/min, and then cooling along with the furnace to obtain the ceramic reinforced metal matrix composite material with the optimized particle size.
And step 3: preparing a high-wear-resistance vertical mill roller sleeve:
(1) preparing a sand mold: corundum sand, chromite sand, clay and a proper amount of water are mixed, and the raw materials and the mass percentage of each raw material are as follows: 10% of clay, 8% of water and the balance of molding sand, wherein in the molding sand, the mass ratio of corundum sand: chromite sand 1: 1. And manufacturing a sand mold, wherein the sand mold is formed by adopting a prefabricated wood mold, carbon dioxide gas is filled for solidification, the wood mold is taken out, and bauxite refractory coating is brushed on the inner surface, and the thickness of the coating is 0.4 mm.
(2) And (3) placing the ceramic reinforced metal matrix composite material with the optimized particle size prepared in the step (2) into a designated position of a sand mold, and then placing the ceramic reinforced metal matrix composite material and the sand mold into a drying furnace for drying, wherein the drying temperature is 100-300 ℃, the step-type drying is carried out, the heat preservation time is 20 hours, the rapid temperature rise is avoided in the drying process, otherwise, the deformation or the cracking of the sand mold is easily caused, and the temperature rise speed is 3 ℃/min.
(3) Smelting the high wear-resistant alloy at 1600 ℃ to obtain high wear-resistant alloy molten steel, and discharging and casting; the high-wear-resistance alloy steel molten steel comprises the following chemical components in percentage by mass: 1.5% of C, 2.0% of Cr, 0.5% of Mn, 3% of Nb, 2% of Si, 0-0.02% of P, 0-0.01% of S, and the balance of Fe and inevitable impurities;
(4) after the high wear-resistant alloy molten steel is discharged from the furnace, gravity casting is adopted, the casting temperature is 1500 ℃, sand removal treatment is carried out after casting, and the high wear-resistant vertical mill roller sleeve is obtained, and the prepared high wear-resistant vertical mill roller sleeve is shown in figure 5; (c) is a side sectional view; (d) is a front cross sectional view;
and 4, step 4: integral heat treatment of the high-wear-resistance vertical mill roller sleeve:
(1) putting the cooled high-wear-resistance vertical mill roller sleeve into a high-temperature furnace for integral high-temperature diffusion annealing treatment, and air cooling; wherein the annealing temperature is 1100 ℃, and the annealing time is 9 h;
(2) quenching the annealed high-wear-resistance vertical mill roller sleeve; wherein the quenching temperature is 1000 ℃, and the temperature is kept for 10 h;
(3) tempering the quenched high-wear-resistance vertical mill roller sleeve; wherein the tempering temperature is 500 ℃ and the temperature is kept for 10 h.
The TiC, (Ti, V) C hard phase and the matrix which are generated in situ in the high-wear-resistance vertical mill roller sleeve prepared by the process have interaction in the sintering process. After the high-wear-resistance vertical mill roller sleeve is subjected to heat treatment, the hardenability is improved, the structure of the roller sleeve is martensite, retained austenite and a generated hard phase, and the wear resistance after the heat treatment is 2-3 times that of an as-cast material.
In the ceramic reinforced metal matrix composite material with the optimized particle size prepared by the process, the hardness of a matrix is 1100HV, the hardness of hard phase particles is 1550HV, and the hardness of an interface between the hard phase particles and the matrix is 1250 HV; the impact toughness of the high-wear-resistance vertical mill roller sleeve is 6.0J/cm2The shear strength was 570 MPa.
Example 6
A ceramic-reinforced metal matrix composite material with optimized particle size is prepared as shown in FIG. 9, and is similar to example 5 except that white corundum particles are used as reinforcing phase ceramic particles, and the compacted ceramic-reinforced block is cylindrical.
The particle size range of the reinforced phase ceramic particles is 1-5 mm, and the average particle size of the white corundum particles in the embodiment is 2 mm.
The matrix material of the compacted ceramic reinforced block is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: c: 0.5%, 10.0% V, 2% Cr, 15% W, 50% Mo, and the balance Fe and unavoidable impurities.
The compacted ceramic reinforcing block is placed in an alumina corundum crucible (phi 80mm x 100mm) and then placed in an atmosphere protection furnace, first evacuated and then filled with argon. Heating to 850 deg.C at a speed of 9 deg.C/min, and maintaining for 50 min; heating to 1450 ℃ at the speed of 5 ℃/min, and preserving heat for 2 h; cooling to 1150 deg.c at 3 deg.c/min and cooling in furnace to obtain the ceramic reinforced metal-base composite material with optimized grain size.
Example 7
A heat-treated ceramic-reinforced metal matrix composite material with an optimized particle size was prepared as shown in FIG. 10, which is the same as example 6 except that B4C+Mo2C as reinforcing phase ceramic particles, wherein, according to the volume ratio, B4C：Mo2C is 1: 1; the compacted ceramic reinforcing block is in the shape of a hexagonal cylinder.
The particle size range of the reinforced phase ceramic particles is 0.1 mu m-1 mm, in the embodiment, B4C、Mo2The average particle diameter of the C particles was 600. mu.m.
The matrix material of the compacted ceramic reinforced block is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: 2.0% of C, 1.0% of Ti, 1.5% of Si, 4% of Mn and the balance of Fe and inevitable impurities.
A heat-treated ceramic-reinforced metal matrix composite material with an optimized particle size, which is similar to example 6, except that: carrying out heat treatment on the sintered ceramic reinforced metal matrix composite material, wherein the annealing temperature is 1100 ℃, and the annealing time is 9 hours; the quenching temperature is 1000 ℃, and the temperature is kept for 10 hours; the tempering temperature is 500 ℃ and the temperature is kept for 10 h.
Example 8
A high wear-resistant vertical mill lining plate is prepared as shown in figure 11 in the same example 5, except that white corundum particles + ZrC + TiC are used as reinforcing phase ceramic particles, and the volume ratio of the white corundum particles: ZrC: TiC is 1:1: 1; the compacted ceramic reinforcing block is cylindrical in shape and has a working zone thickness of 1/3 in its entirety.
The grain size range of the reinforced phase ceramic grains is 0.1-1 mm and 1-5 mm, the average grain size of ZrC and TiC grains in the embodiment is 800 microns, and the average grain size of white corundum grains is 2 mm.
The matrix material of the compacted ceramic reinforced block is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: 1.5% of C, 2.0% of Mn, 50% of Cr, 6% of Mo, 1% of Ni and the balance of Fe and inevitable impurities.
A method for preparing a high-wear-resistance vertical mill lining plate, which is the same as in example 5, and is characterized in that: the cast high-wear-resistance alloy steel molten steel comprises the following chemical components in percentage by mass: 2.5% of C, 3.0% of Cr, 20% of Nb and 1% of Ni, and the balance being Fe and inevitable impurities.
Example 9
A highly wear resistant block was prepared as in example 5, except that Si was added3N4+ AlN + BN particles as reinforcing phase ceramic particles, in volume ratio, Si3N4: AlN: BN 1:1: 1; the compacted ceramic reinforcing block is in the shape of a hexagonal cylinder with a working zone thickness of 1/2 in its entirety.
The particle size range of the reinforcing phase ceramic particles is 0.1 mu m-1 mm, and the average particle size of the ceramic particles in example 9 is 900 mu m.
The matrix material of the compacted ceramic reinforced block is wear-resistant metal alloy powder, and the wear-resistant metal alloy powder comprises the following components in percentage by mass: 1.0% of C, 10% of Cr, 1.5% of Si, 2% of Ti, 20% of Mn and the balance of Fe and inevitable impurities.
A method for preparing a high abrasion resistant block, which is the same as example 5 except that: the cast high-wear-resistance alloy steel molten steel comprises the following chemical components in percentage by mass: 1.5% of C, 2.0% of Cr, 25% of W, 1% of Ti, 0.02% of P, S: 0.01%, and the balance of Fe and inevitable impurities.
Claims (3)
1. The use method of the ceramic-reinforced metal-based composite material with the optimized particle size is characterized in that the ceramic-reinforced metal-based composite material with the optimized particle size is used for preparing a lining plate of high-wear-resistance crushing equipment or a roller sleeve of the high-wear-resistance crushing equipment, and comprises the following steps:
the method comprises the following steps: preparation of Sand molds
Setting a working area as a ceramic reinforced metal matrix composite with an optimized grain diameter according to the shape of a lining plate of high-wear-resistance crushing equipment or a roller sleeve of the high-wear-resistance crushing equipment to be prepared, and then preparing a sand mold according to the setting;
step two: putting the ceramic-reinforced metal matrix composite material with the optimized particle size into a sand mold, and drying the ceramic-reinforced metal matrix composite material with the optimized particle size and the sand mold together to obtain the dried ceramic-reinforced metal matrix composite material with the optimized particle size and the sand mold; wherein the drying temperature is 100-300 ℃, the heat preservation time is 10-20 h, and the heating rate is 2-5 ℃/min; more specifically: heating to 40-50 ℃, preserving heat for 1h, heating to 70-80 ℃, preserving heat for 1h, heating to 100-300 ℃, and preserving heat for 8-18 h;
the ceramic reinforced metal matrix composite material with the optimized particle size consists of a metal matrix material and reinforced phase ceramic particles; wherein the volume percentage content of the reinforcing phase in the ceramic reinforced metal matrix composite material with the optimized particle size is 20-50%;
the particle size of the reinforced phase ceramic particles is 0.01-0.1 μm, the mixed particle size of at least two of 0.1-1 mm and 1-5 mm, and when the mixed particle size interval is defined to be within the range of 0.1-1 mm and 1-5 mm, the difference X between the particle sizes is set as: x is more than 0 mu m and less than or equal to 2.0 mm;
the reinforced phase ceramic particles are one or a mixture of oxide ceramic particles, carbide ceramic particles or nitride ceramic particles;
wherein the oxide ceramic particles are: white corundum particles, brown corundum particles or ZrO2- Al2O3One or more of the particles;
the carbide ceramic particles are: WC particles, SiC particles, TiC particles, VC particles and B4C particles, Mo2C particles, ZrC particles or Cr3C2One or more of the particles;
the nitride ceramic particles are: si3N4One or more of particles, BN particles, AlN particles or TiN particles;
the raw material of the metal matrix material is metal alloy powder;
the metal alloy powder comprises the following alloy components in percentage by mass: c:0 to 8.0% of Mo, 0 to 50% of Mn, 0 to 40% of Cr, 0 to 50% of V, 0 to 10% of Ti, 0 to 20% of Si, 0.1 to 4.0% of Ni, 0 to 15% of W, 0 to 5.0% of Nb, and the balance of Fe and unavoidable impurities, wherein the particle size is 60 to 400 mesh;
the preparation method of the ceramic reinforced metal matrix composite material with the optimized particle size comprises the following steps:
step 1: selecting and pretreating reinforced phase ceramic particles:
(1) weighing the enhanced-phase ceramic particles according to the prepared ceramic enhanced metal matrix composite material with the optimized particle size;
(2) removing impurities of the enhanced phase ceramic particles, and drying to obtain pretreated enhanced phase ceramic particles;
step 2: preparation of ceramic reinforced metal matrix composite material with optimized particle size
(1) Weighing raw materials according to the proportion, mixing the pretreated reinforced phase ceramic particles and the metal matrix material, and uniformly mixing to obtain a mixed material; wherein, according to the volume ratio, the pretreated reinforced phase ceramic particles are as follows: metal matrix material = 1: (2-5);
(2) putting the mixed materials into a compaction die, pressing by adopting the pressure of 200-300 MPa, and maintaining the pressure for 10-30 s to obtain a compacted ceramic reinforced block;
(3) placing the compacted ceramic reinforced block into a crucible, then placing the crucible into an atmosphere protection furnace, and performing presintering by adopting a programmed temperature control liquid phase sintering method to obtain a ceramic reinforced metal matrix composite material with an optimized particle size;
the programmed temperature control liquid phase sintering method comprises the following specific steps: the atmosphere protection furnace is an oxygen-free atmosphere protection furnace, and the sintering process comprises the following steps: heating to 800-900 ℃ at the speed of 8-10 ℃/min, and preserving heat for 30-60 min; heating to 1350-1500 ℃ at the speed of 4-6 ℃/min, and preserving heat for 3-10 h; cooling to 1100-1260 ℃ at the speed of 2-4 ℃/min and then cooling along with the furnace;
the hardness of the matrix of the ceramic reinforced metal matrix composite material with the optimized particle size is more than or equal to 900HV, the interface hardness of the metal matrix material and the ceramic particles is more than or equal to 1100HV, and the hardness of the ceramic particles is more than or equal to 1400 HV;
step three: smelting the high wear-resistant alloy at 1600-1700 ℃ to obtain high wear-resistant alloy molten steel; the high-wear-resistance alloy molten steel comprises the following chemical components in percentage by mass: 0.8 to 4.0% of C, 2.0 to 30% of Cr, 0.3 to 20% of Mn, 0 to 15% of V, 0 to 10% of Ni, 0 to 25% of W, 0 to 3% of Nb, 0 to 10% of Ti, 0 to 2% of Si, 0 to 0.02% of P, 0 to 0.01% of S, and the balance of Fe and inevitable impurities;
step four: and discharging the high-wear-resistant alloy molten steel, casting the high-wear-resistant alloy molten steel to a casting area in the dried ceramic reinforced metal matrix composite material with the optimized particle size and the sand mold by adopting gravity casting, wherein the casting temperature is 1500-1600 ℃, and performing sand removal treatment after casting to obtain a high-wear-resistant crushing equipment lining plate or a high-wear-resistant crushing equipment roller sleeve.
2. The method of using an optimized particle size ceramic reinforced metal matrix composite as claimed in claim 1, further comprising the steps of:
step I: annealing
Carrying out integral high-temperature diffusion annealing treatment on the lining plate of the high-wear-resistance crushing equipment or the roller sleeve of the high-wear-resistance crushing equipment, and carrying out air cooling to obtain an annealed lining plate of the high-wear-resistance crushing equipment or an annealed roller sleeve of the high-wear-resistance crushing equipment; wherein the annealing temperature is 1000-1300 ℃, and the annealing time is 8-10 h;
step II: quenching
Quenching the annealed high-wear-resistance crushing equipment lining plate or the annealed high-wear-resistance crushing equipment roller sleeve to obtain a quenched high-wear-resistance crushing equipment lining plate or a quenched high-wear-resistance crushing equipment roller sleeve; wherein the quenching temperature is 850-1100 ℃, and the temperature is kept for 9-12 h;
step III: tempering
Tempering the quenched high-wear-resistance crushing equipment lining plate or the quenched high-wear-resistance crushing equipment roller sleeve to obtain a heat-treated high-wear-resistance crushing equipment lining plate or a heat-treated high-wear-resistance crushing equipment roller sleeve; wherein the tempering temperature is 350-550 ℃, and the temperature is kept for 9-12 h.
3. The use method of the ceramic-reinforced metal matrix composite material with the optimized particle size as claimed in claim 1, wherein the hardness of the high wear-resistant alloy in the casting area is more than or equal to 850HV, and the hardness of the lining plate of the high wear-resistant crushing equipment or the roller sleeve of the high wear-resistant crushing equipment is more than or equal to 850 HV;
the impact toughness of the lining plate of the high wear-resistant crushing equipment or the roller sleeve of the high wear-resistant crushing equipment is more than or equal to 5.5J/cm2The shear strength is more than or equal to 530 MPa.
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| EP3653744A1 (en) * | 2018-11-16 | 2020-05-20 | The Swatch Group Research and Development Ltd | Composite material with a metal matrix and method for manufacturing such a material |
| CN110055448A (en) * | 2019-04-24 | 2019-07-26 | 河北科技大学 | A kind of metal-base composites and preparation method thereof |
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| CN113122773B (en) * | 2021-04-16 | 2022-01-11 | 东北大学 | Ceramic reinforced Fe-Cr-B alloy composite material and application and preparation method thereof |
| CN113718175B (en) * | 2021-09-02 | 2022-10-11 | 常熟市电力耐磨合金铸造有限公司 | Metal ceramic inlaid composite roller |
| CN114799063B (en) * | 2022-04-28 | 2024-03-22 | 河北科技大学 | Preparation method of titanium carbonitride and chromium carbide synergistically reinforced iron-based composite impeller |
| CN114855052A (en) * | 2022-05-13 | 2022-08-05 | 赵克中 | Molybdenum-titanium-based alloy material and preparation method thereof |
| CN115212994A (en) * | 2022-06-12 | 2022-10-21 | 华能国际电力股份有限公司营口电厂 | High-wear-resistance metal ceramic composite roller sleeve and preparation method thereof |
| CN115093235B (en) * | 2022-06-22 | 2023-04-25 | 合肥水泥研究设计院有限公司 | Surface modification process of ZTA ceramic particles for preparing iron-based composite wear-resistant material |
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