Preparation technology of a new type of ceramic alloy roller sleeve

Abstract

The invention discloses a novel process for preparing a ceramic alloy roller sleeve, comprising: (1) preparing a ceramic prefabricated block: pre-treating ceramic particles; making an aluminum mold for the ceramic prefabricated block; mixing various materials to prepare the ceramic prefabricated block; (2) installing the ceramic prefabricated block on a metal outer mold of the roller sleeve: pre-processing a plurality of holes on the left and right halves of the metal mold of the roller sleeve, filling the holes with water glass sand, and then installing the ceramic prefabricated block after drying; aligning the positions of the nail holes on the ceramic prefabricated block with the positions of the holes on the metal mold, inserting the self-tapping screws from the nail holes of the ceramic prefabricated block and screwing them into the water glass sand; closing the metal mold; smelting high-chromium molten iron; casting the metal mold to obtain a high-temperature roller sleeve blank; heat treatment; and machining to obtain a finished roller sleeve.

Description

Technical Field

[0001] The invention belongs to the technical field of grinding rollers, and more specifically, relates to a preparation process of a novel ceramic alloy roller sleeve. Background Art

[0002] In the power, cement, metallurgy, mining and other industries, grinding rollers are widely used in the pulverizing system. As the main wear-resistant parts, the wear resistance of grinding rollers directly affects the pulverizing operation rate, coal powder quality, grinding roller consumption and production cost. Because any grinding roller material will be seriously worn under the pulverizing conditions, when the grinding roller is worn and has serious pits and grooves, the coal pulverizer efficiency will be reduced and the coal pulverizer output will be insufficient.

[0003] At present, most of the grinding rollers used in thermal power plants are cast from high-chromium cast iron, which is expensive and difficult to grind. Repeatedly surfacing with wear-resistant alloy layers on the rollers after operation wear can increase the service life of the rollers, but the number of times is limited and the cost is high. The surfacing layer is prone to fall off. At the same time, the frequent shutdown and maintenance of power plants has caused great economic losses. The service life is generally 6000-8000 hours.

[0004] The roller sleeve is the core component of the coal mill. When the coal quality in the power plant is poor, there is a lot of stone mixed in the coal. The roller sleeve vibrates greatly during operation and has a short life. It is necessary to improve the strength, wear resistance and maintainability of the roller sleeve.

[0005] In order to increase the service life of the grinding roller, power plants are gradually beginning to use metal-ceramic composite grinding rollers, which can reach 2-3 times the service life of surfacing materials. There are two relatively mature structural forms of metal-ceramic composite grinding rollers, one-time casting and two-time casting. The one-time casting process refers to the ceramic core plate being cast with high-chromium cast iron material at one time, which increases the service life of the grinding roller, but the scrap grinding roller cannot be surfacing and reused after wear, and the scrap grinding roller cannot be directly returned to the furnace for use, which requires a lot of carbon planing and labor costs, and seriously affects the use frequency of the lining materials of the medium frequency furnace, and increases the maintenance cost of the medium frequency furnace.

[0006] The composite grinding roller is prepared by the secondary casting molding process. First, high-chromium cast iron is used to cast the ceramic grid body to prepare the metal-ceramic composite wear-resistant parts. Then, the metal-ceramic composite wear-resistant parts are cast with ductile iron for the secondary casting to prepare the composite grinding roller. The overall casting of the grinding roller with high-chromium cast iron reduces the cost, but the grinding roller cannot be used for surfacing after use, and the cost of recycling the waste grinding roller is high. For users, although the use of metal-ceramic grinding rollers can achieve 2-3 times the original surfacing materials, the inability to be re-surfaced and reused in the later stage has become a disadvantage of the two processes. Purchasing metal-ceramic composite grinding rollers again requires a lot of capital costs. This problem has become an important reason why the product cannot be widely promoted.

[0007] The metal-ceramic composite grinding roller with a detachable structure can be repaired by removing and replacing the roller skin with a wear-resistant layer on the surface of the roller core. However, the roller skin is not easy to process, resulting in poor matching quality between the roller skin lining and the roller core. It is easy to vibrate during operation and even cause the roller skin lining to break, resulting in the scrapping of the grinding roller. Summary of the invention

[0008] Purpose of the invention: The purpose of the present invention is to solve the deficiencies in the prior art and provide a new preparation process for a ceramic alloy roller sleeve, thereby shortening the production cycle and further improving the wear resistance of the roller sleeve and increasing the service life of the roller sleeve.

[0009] Technical solution: The preparation process of a novel ceramic alloy roller sleeve described in the present invention comprises the following steps:

[0010] (1) Preparation of ceramic prefabricated blocks:

[0011] S1. Pre-treating the ceramic particles: washing with alcohol, washing with water, and drying;

[0012] S2, making an aluminum master mold of a ceramic prefabricated block, and then using the aluminum master mold to make a silicone mold;

[0013] S3, mixing the high temperature powder and the binder in a ratio of 1:1.5-2.5 and stirring evenly to form a powder slurry mixture;

[0014] S4, mixing the powder slurry mixture with the ceramic particles, stirring them with a mixer, pouring them into the silicone mold made of the aluminum master mold and filling and smoothing them, and then drying them in an oven at 100-120°C for 1-2 hours, taking them out and demoulding them to obtain a ceramic prefabricated block;

[0015] S5, placing the demoulded ceramic prefabricated block into a microwave oven to dehydrate the crystal water to obtain a dry ceramic prefabricated block, and placing the dried ceramic prefabricated block into an oven for storage;

[0016] (2) The ceramic prefabricated block is installed on the metal outer mold of the roller sleeve:

[0017] S6. Pre-process several holes on the metal molds of the left and right halves of the roller sleeve, stuff water glass sand into the holes to level them with the inner wall of the mold cavity, and after the water glass sand hardens, brush the inner cavity of the metal mold with high-temperature resistant paint, and start installing the ceramic prefabricated block after drying; align the positions of the nail holes on the ceramic prefabricated block with the positions of the holes on the metal mold, and insert the self-tapping screws from the nail holes of the ceramic prefabricated block and screw them into the water glass sand;

[0018] S7, close the metal mold, put it into a heating furnace and heat it to 300-400°C and keep it warm for 2-3 hours, take it out, put the clay core made of resin sand into the middle of the metal mold, put the cover box made of resin sand into it, and close the box;

[0019] S8, smelting high chromium molten iron;

[0020] S9, casting metal mold, unpacking after 5-6 hours, quickly removing mud core and pouring riser, and obtaining high-temperature roller sleeve blank;

[0021] S10, heat treatment: put the roller sleeve blank into a 220-230KW pit-type electric furnace for heating and heat treatment;

[0022] S11, machining to obtain the finished roller sleeve.

[0023] In some embodiments, the weight percentage composition of the ceramic particles is: 20-30% titanium carbide, 30-40% Al2O3, and 25-35% ZrO2. Spherical particles are formed by sintering process, and the particle size is 1.8-3.0 mm.

[0024] In some embodiments, the weight percentage composition of the high temperature powder is: TiC powder 20-25%, Al2O3 powder 30-40%, ZrO2 powder 20-30%, Fe3O4 powder 15-20%.

[0025] In some embodiments, the binder comprises sodium water glass with a modulus of 3.5-4.2 and a concentration of 38-45% aqueous solution.

[0026] In some embodiments, in step S4, the weight of the ceramic particles accounts for 90-94% and the powder slurry mixture accounts for 6%-10%.

[0027] In some embodiments, in step S4, a plurality of bosses with a height of 10 mm are provided on the outer arc of the ceramic prefabricated block.

[0028] In some embodiments, in step S5, the demoulded ceramic prefabricated block is placed in a 9-10KW high-power microwave oven to dehydrate the crystal water to obtain a dry ceramic prefabricated block, which is then placed in a 60-70°C oven for storage.

[0029] In some embodiments, in step S8, the weight percentage of the high chromium molten iron is as follows: Cr: 20-22%, Mo: 1.8-2.5%, Ni: 0.5-1.2%, Mn: 1.0-1.5%, C: 2.7-3.1%, Cu: 0.3-0.6%, V: 0.1-0.3%.

[0030] In some embodiments, the heat treatment in step S10 includes normalizing and tempering.

[0031] In some embodiments, the normalizing temperature control includes: from 0 to 5 hours, gradually increasing the temperature from 350°C to 550°C; from 5 to 6 hours, maintaining the temperature at 550°C; from 6 to 14 hours, gradually increasing the temperature from 550°C to 830°C; from 14 to 15 hours, maintaining the temperature at 830°C; from 15 to 21 hours, gradually increasing the temperature from 830°C to 1040°C; from 21 to 25 hours, maintaining the temperature at 1040°C, and after 25 hours, taking the furnace out for air cooling;

[0032] The tempering temperature control includes: in the 0th to 4th hour, gradually increasing the temperature from room temperature to 380° C.; in the 4th to 7th hour, maintaining the temperature at 380° C., and then cooling with the furnace.

[0033] Beneficial effects: The beneficial effects of the present invention are as follows:

[0034] (1) In the present invention, the ceramic prefabricated block is made of ceramic particles, high temperature powder and a binder, and is in a grid shape, and is used to be compounded into high chromium to form a wear-resistant layer with dual wear resistance;

[0035] (2) In the present invention, a plurality of bosses with a height of 10 mm are arranged on the outer arc of the ceramic prefabricated block, and the bosses are used to control the gap with the inner cavity of the metal mold;

[0036] (3) In the present invention, a plurality of holes (diameter Ø25 mm, depth 50 mm) are pre-processed on the metal molds of the left and right halves of the roller sleeve, water glass sand is stuffed into the holes to level them with the inner wall of the mold cavity, and the water glass sand is stuffed into the holes for binding the ceramic prefabricated blocks; after the water glass sand is hardened, the inner cavity of the metal mold is brushed with high temperature resistant paint, and after drying, the ceramic prefabricated blocks are installed; the positions of the nail holes on the ceramic prefabricated blocks are aligned with the positions of the holes on the metal mold, and the self-tapping screws are inserted from the nail holes of the ceramic prefabricated blocks and screwed into the water glass sand, thereby effectively fixing the ceramic prefabricated blocks to the metal mold;

[0037] (4) In the present invention, the roller sleeve is heat treated by adopting the tempering and annealing temperature control process, so that the roller sleeve as a whole can be ensured to have high hardness performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A front view of a ceramic prefabricated block structure according to an embodiment of the present invention;

[0039] Figure 2 A side view of a ceramic prefabricated block structure according to an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the three-dimensional structure of a ceramic prefabricated block according to an embodiment of the present invention;

[0041] Figure 4 A schematic diagram of the outer mold structure of a metal mold according to an embodiment of the present invention;

[0042] Figure 5 A normalizing temperature control diagram for an embodiment of the present invention;

[0043] Figure 6 This is a tempering temperature control diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "inside" and "outside" are the directions or positional relationships shown, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings. Example

[0048] A preparation process of a novel ceramic alloy roller sleeve comprises the following steps:

[0049] (1) Preparation of ceramic prefabricated blocks:

[0050] S1. Pre-treat the ceramic particles: wash with alcohol, wash with water, and dry; the weight percentage composition of the ceramic particles is: 25% titanium carbide, 40% Al2O3, and 35% ZrO2, and sintering process is used to form spherical particles with a particle size of 1.8-3.0 mm;

[0051] S2, making an aluminum master mold of a ceramic prefabricated block, and then using the aluminum master mold to make a silicone mold;

[0052] S3, mixing the high temperature powder and the binder in a ratio of 1:1.5 and stirring evenly to form a powder slurry mixture; the weight percentage composition of the high temperature powder is: TiC powder 20%, Al2O3 powder 35%, ZrO2 powder 25%, Fe3O4 powder 20%; the composition of the binder is: sodium water glass with a modulus of 3.5-4.2, and a concentration of 38-45% aqueous solution;

[0053] S4, mixing the powder slurry mixture with ceramic particles, the weight of ceramic particles accounts for 90%, and the powder slurry mixture accounts for 10%; stirring with a mixer, pouring into the silicone mold made of the aluminum master mold and filling and smoothing, and then putting it into a 100°C oven for drying for 1 hour, taking it out and demolding it to obtain a ceramic prefabricated block, the outer arc of the ceramic prefabricated block is provided with a plurality of (preferably four) 10mm high bosses 1, the bosses 1 are used to control the gap with the inner cavity of the metal mold, such as Figures 1 to 3 As shown;

[0054] S5, placing the demoulded ceramic prefabricated block into a 9KW high-power microwave oven to dehydrate the crystal water to obtain a dry ceramic prefabricated block, and placing the dried ceramic prefabricated block into a 60° C. oven for storage;

[0055] (2) The ceramic prefabricated block is installed on the metal outer mold of the roller sleeve:

[0056] S6. Pre-process several holes 3 (diameter Ø25mm, depth 50mm) on the metal molds of the left and right halves of the roller sleeve, such as Figure 4 As shown. Sodium silicate sand is stuffed into hole 3 to level the inner wall of the mold cavity, and the water glass sand is stuffed in to bind the ceramic prefabricated blocks; after the water glass sand hardens, the inner cavity of the metal mold is brushed with high temperature resistant paint, and after drying, the ceramic prefabricated blocks are installed; the position of the nail hole 2 on the ceramic prefabricated block is aligned with the position of the hole 3 on the metal mold, and the self-tapping screw is inserted from the nail hole 2 of the ceramic prefabricated block and screwed into the water glass sand; a ceramic prefabricated block is provided with 4-8 nail holes according to the size of the ceramic block, and the ceramic prefabricated blocks (20-50 blocks) are filled along the inner circumference of the metal mold cavity, and there are 1-2 layers of ceramic prefabricated blocks above and below.

[0057] S7, close the metal mold, put it into a heating furnace, heat it to 300°C and keep it warm for 2 hours, take it out, put the clay core made of resin sand into the middle of the metal mold, put the cover box made of resin sand into it, and close the box;

[0058] S8, smelting high chromium molten iron, the weight percentage of the high chromium molten iron composition is: Cr: 20%, Mo: 1.8%, Ni: 0.5%, Mn: 1.0%, C: 2.7%, Cu: 0.3%, V: 0.1%, the balance is Fe and impurities;

[0059] S9, casting the metal mold, unpacking after 5 hours, quickly removing the mud core and the pouring riser, and obtaining a high-temperature roller sleeve blank;

[0060] S10, heat treatment: put the roller sleeve blank into a 220KW pit-type electric furnace for heating and heat treatment, the heat treatment includes normalizing and tempering;

[0061] Among them, the normalizing temperature control includes: from 0 to 5 hours, gradually increase the temperature from 350℃ to 550℃; from 5 to 6 hours, maintain the temperature at 550℃; from 6 to 14 hours, gradually increase the temperature from 550℃ to 830℃; from 14 to 15 hours, maintain the temperature at 830℃; from 15 to 21 hours, gradually increase the temperature from 830℃ to 1040℃; from 21 to 25 hours, maintain the temperature at 1040℃, and take the furnace out for air cooling after 25 hours;

[0062] The tempering temperature control includes: in the 0th to 4th hour, gradually raising the temperature from room temperature to 380°C; in the 4th to 7th hour, maintaining the temperature at 380°C, and then cooling with the furnace.

[0063] S11, machining to obtain the finished roller sleeve. Example

[0064] A preparation process of a novel ceramic alloy roller sleeve comprises the following steps:

[0065] (1) Preparation of ceramic prefabricated blocks:

[0066] S1. Pre-treat the ceramic particles: wash with alcohol, wash with water, and dry; the weight percentage composition of the ceramic particles is: 30% titanium carbide, 40% Al2O3, 25% ZrO2, and the rest are other components, and sintering process is used to form spherical particles with a particle size of 1.8-3.0 mm;

[0067] S2, making an aluminum master mold of a ceramic prefabricated block, and then using the aluminum master mold to make a silicone mold;

[0068] S3, mixing the high temperature powder and the binder in a ratio of 1:2 and stirring evenly to form a powder slurry mixture; the weight percentage composition of the high temperature powder is: TiC powder 25%, Al2O3 powder 35%, ZrO2 powder 25%, Fe3O4 powder 15%; the composition of the binder is: sodium water glass with a modulus of 3.5-4.2, and a concentration of 38-45% aqueous solution;

[0069] S4, mixing the powder slurry mixture with ceramic particles, with the weight of ceramic particles accounting for 92% and the powder slurry mixture accounting for 8%; stirring with a mixer, pouring into a silicone mold made of an aluminum master mold and filling and smoothing it, then putting it in a 110°C oven for drying for 1.5 hours, taking it out and demolding it to obtain a ceramic prefabricated block, and the outer arc of the ceramic prefabricated block is provided with a plurality of 10mm high bosses;

[0070] S5, placing the demoulded ceramic prefabricated block into a 9.5KW high-power microwave oven to dehydrate the crystal water to obtain a dry ceramic prefabricated block, and placing the dried ceramic prefabricated block into a 65°C oven for storage;

[0071] (2) The ceramic prefabricated block is installed on the metal outer mold of the roller sleeve:

[0072] S6. Pre-process several holes on the metal molds of the left and right halves of the roller sleeve, stuff water glass sand into the holes to level them with the inner wall of the mold cavity, and after the water glass sand hardens, brush the inner cavity of the metal mold with high-temperature resistant paint, and start installing the ceramic prefabricated block after drying; align the positions of the nail holes on the ceramic prefabricated block with the positions of the holes on the metal mold, and insert the self-tapping screws from the nail holes of the ceramic prefabricated block and screw them into the water glass sand;

[0073] S7, close the metal mold, put it into a heating furnace, heat it to 350°C and keep it warm for 2.5 hours, take it out, put the clay core made of resin sand into the middle of the metal mold, put the cover box made of resin sand into it, and close the box;

[0074] S8, smelting high chromium molten iron, the weight percentage of the high chromium molten iron is as follows: Cr: 21%, Mo: 2.2%, Ni: 0.8%, Mn: 1.2%, C: 2.8%, Cu: 0.5%, V: 0.2%, and the balance is Fe and impurities;

[0075] S9, casting metal mold, unpacking after 5.5 hours, quickly removing mud core and pouring riser, and obtaining high-temperature roller sleeve blank;

[0076] S10, heat treatment: put the roller sleeve blank into a 2250KW pit-type electric furnace for heating and heat treatment, including normalizing and tempering;

[0077] Among them, the normalizing temperature control includes: from 0 to 5 hours, gradually increase the temperature from 350℃ to 550℃; from 5 to 6 hours, maintain the temperature at 550℃; from 6 to 14 hours, gradually increase the temperature from 550℃ to 830℃; from 14 to 15 hours, maintain the temperature at 830℃; from 15 to 21 hours, gradually increase the temperature from 830℃ to 1040℃; from 21 to 25 hours, maintain the temperature at 1040℃, and take the furnace out for air cooling after 25 hours;

[0078] The tempering temperature control includes: in the 0th to 4th hour, gradually raising the temperature from room temperature to 380°C; in the 4th to 7th hour, maintaining the temperature at 380°C, and then cooling with the furnace.

[0079] S11, machining to obtain the finished roller sleeve. Example

[0080] A preparation process of a novel ceramic alloy roller sleeve comprises the following steps:

[0081] (1) Preparation of ceramic prefabricated blocks:

[0082] S1. Pre-treat the ceramic particles: wash with alcohol, wash with water, and dry; the weight percentage composition of the ceramic particles is: 30% titanium carbide, 40% Al2O3, and 30% ZrO2, and the sintering process is used to form spherical particles with a particle size of 1.8-3.0 mm;

[0083] S2, making an aluminum master mold of a ceramic prefabricated block, and then using the aluminum master mold to make a silicone mold;

[0084] S3, mixing the high temperature powder and the binder in a ratio of 1:2.5 and stirring evenly to form a powder slurry mixture; the weight percentage composition of the high temperature powder is: TiC powder 25%, Al2O3 powder 35%, ZrO2 powder 25%, Fe3O4 powder 15%; the composition of the binder is: sodium water glass with a modulus of 3.5-4.2, and a concentration of 38-45% aqueous solution;

[0085] S4, mixing the powder slurry mixture with ceramic particles, the weight of ceramic particles accounting for 94%, and the powder slurry mixture accounting for 6%; stirring with a mixer, pouring into a silicone mold made of an aluminum master mold and filling and smoothing it, and then putting it in a 120°C oven to dry for 2 hours, then taking it out and demolding it to obtain a ceramic prefabricated block, and the outer arc of the ceramic prefabricated block is provided with a plurality of 10mm high bosses;

[0086] S5, placing the demoulded ceramic prefabricated block in a 10KW high-power microwave oven to dehydrate the crystal water to obtain a dry ceramic prefabricated block, and storing it in a 70°C oven;

[0087] (2) The ceramic prefabricated block is installed on the metal outer mold of the roller sleeve:

[0088] S6. Pre-process several holes on the metal molds of the left and right halves of the roller sleeve, stuff water glass sand into the holes to level them with the inner wall of the mold cavity, and after the water glass sand hardens, brush the inner cavity of the metal mold with high-temperature resistant paint, and start installing the ceramic prefabricated block after drying; align the positions of the nail holes on the ceramic prefabricated block with the positions of the holes on the metal mold, and insert the self-tapping screws from the nail holes of the ceramic prefabricated block and screw them into the water glass sand;

[0089] S7, close the metal mold, put it into a heating furnace, heat it to 400°C and keep it warm for 3 hours, take it out, put the clay core made of resin sand into the middle of the metal mold, put the cover box made of resin sand into it, and close the box;

[0090] S8, smelting high chromium molten iron, the weight percentage of the high chromium molten iron composition is: Cr: 22%, Mo: 2.5%, Ni: 1.2%, Mn: 1.5%, C: 3.1%, Cu: 0.6%, V: 0.3%, the balance is Fe and impurities;

[0091] S9, casting the metal mold, unpacking after 6 hours, quickly removing the mud core and the pouring riser, and obtaining a high-temperature roller sleeve blank;

[0092] S10, heat treatment: put the roller sleeve blank into a 230KW pit-type electric furnace for heating and heat treatment, which includes normalizing and tempering;

[0093] Among them, the normalizing temperature control includes: from 0 to 5 hours, gradually increase the temperature from 350℃ to 550℃; from 5 to 6 hours, maintain the temperature at 550℃; from 6 to 14 hours, gradually increase the temperature from 550℃ to 830℃; from 14 to 15 hours, maintain the temperature at 830℃; from 15 to 21 hours, gradually increase the temperature from 830℃ to 1040℃; from 21 to 25 hours, maintain the temperature at 1040℃, and take the furnace out for air cooling after 25 hours;

[0094] The tempering temperature control includes: in the 0th to 4th hour, gradually raising the temperature from room temperature to 380°C; in the 4th to 7th hour, maintaining the temperature at 380°C, and then cooling with the furnace.

[0095] S11, machining to obtain the finished roller sleeve.

[0096] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A new type of ceramic alloy roller sleeve preparation process, characterized in that: The steps include: (1) Preparation of ceramic prefabricated blocks: S1. Pre-treating the ceramic particles: washing with alcohol, washing with water, and drying; S2, making an aluminum master mold of a ceramic prefabricated block, and then using the aluminum master mold to make a silicone mold; S3, mixing the high temperature powder and the binder in a ratio of 1:1.5-2.5 and stirring evenly to form a powder slurry mixture; S4, mixing the powder slurry mixture with ceramic particles, wherein the weight of the ceramic particles accounts for 90-94% and the powder slurry mixture accounts for 6%-10%; stirring with a mixer, pouring into a silicone mold made of an aluminum master mold and filling and smoothing it, then placing it in a 100-120°C oven and drying it for 1-2 hours, taking it out and demolding it to obtain a ceramic prefabricated block, and the outer arc of the ceramic prefabricated block is provided with a plurality of 10mm high bosses; S5, placing the demoulded ceramic prefabricated block in a 9-10KW high-power microwave oven to dehydrate the crystal water to obtain a dry ceramic prefabricated block, and storing it in a 60-70°C oven; (2) The ceramic prefabricated block is installed on the metal outer mold of the roller sleeve: S6. Pre-process several holes on the metal molds of the left and right halves of the roller sleeve, stuff water glass sand into the holes to level them with the inner wall of the mold cavity, and after the water glass sand hardens, brush the inner cavity of the metal mold with high-temperature resistant paint, and start installing the ceramic prefabricated block after drying; align the positions of the nail holes on the ceramic prefabricated block with the positions of the holes on the metal mold, and insert the self-tapping screws from the nail holes of the ceramic prefabricated block and screw them into the water glass sand; S7, close the metal mold, put it into a heating furnace and heat it to 300-400°C and keep it warm for 2-3 hours, take it out, put the clay core made of resin sand into the middle of the metal mold, put the cover box made of resin sand into it, and close the box; S8, smelting high chromium molten iron; S9, casting metal mold, unpacking after 5-6 hours, quickly removing mud core and pouring riser, and obtaining high-temperature roller sleeve blank; S10, heat treatment: put the roller sleeve blank into a 220-230KW pit-type electric furnace for heating and heat treatment; S11, machining to obtain the finished roller sleeve.

2. The preparation process of a novel ceramic alloy roller sleeve according to claim 1 is characterized in that: The weight percentage composition of the ceramic particles is: 20-30% titanium carbide, 30-40% Al2O3, and 25-35% ZrO2. Spherical particles are formed by sintering process, and the particle size is 1.8-3.0 mm.

3. The preparation process of a novel ceramic alloy roller sleeve according to claim 1 is characterized in that: The weight percentage composition of the high temperature powder is: TiC powder 20-25%, Al2O3 powder 30-40%, ZrO2 powder 20-30%, Fe3O4 powder 15-20%.

4. The preparation process of a novel ceramic alloy roller sleeve according to claim 1 is characterized in that: The binder comprises sodium water glass with a modulus of 3.5-4.2 and a concentration of 38-45% aqueous solution.

5. The preparation process of a novel ceramic alloy roller sleeve according to claim 1 is characterized in that: In step S8, the weight percentage of the high chromium molten iron is as follows: Cr: 20-22%, Mo: 1.8-2.5%, Ni: 0.5-1.2%, Mn: 1.0 -1.5%, C: 2.7-3.1%, Cu: 0.3-0.6%, V: 0.1-0.3%, and the remainder is Fe and impurities.

6. The preparation process of a novel ceramic alloy roller sleeve according to claim 1 is characterized in that: The heat treatment in step S10 includes normalizing and tempering.

7. The preparation process of a novel ceramic alloy roller sleeve according to claim 6 is characterized in that: The normalizing temperature control includes: in the 0th to 5th hour, gradually increasing the temperature from 350°C to 550°C; in the 5th to 6th hour, maintaining the temperature at 550°C; in the 6th to 14th hour, gradually increasing the temperature from 550°C to 830°C; in the 14th to 15th hour, maintaining the temperature at 830°C; in the 15th to 21st hour, gradually increasing the temperature from 830°C to 1040°C; in the 21st to 25th hour, maintaining the temperature at 1040°C, and after 25 hours, taking the furnace out for air cooling; The tempering temperature control includes: in the 0th to 4th hour, gradually increasing the temperature from room temperature to 380° C.; in the 4th to 7th hour, maintaining the temperature at 380° C., and then cooling with the furnace.

Images