CN116079027A - Preparation method of centrifugal casting metal ceramic composite grinding roller for glass fiber industry - Google Patents
Preparation method of centrifugal casting metal ceramic composite grinding roller for glass fiber industry Download PDFInfo
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- CN116079027A CN116079027A CN202211547036.2A CN202211547036A CN116079027A CN 116079027 A CN116079027 A CN 116079027A CN 202211547036 A CN202211547036 A CN 202211547036A CN 116079027 A CN116079027 A CN 116079027A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 127
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 83
- 239000002184 metal Substances 0.000 title claims abstract description 83
- 238000000227 grinding Methods 0.000 title claims abstract description 70
- 238000009750 centrifugal casting Methods 0.000 title claims abstract description 48
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 239000003365 glass fiber Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 112
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 77
- 239000000956 alloy Substances 0.000 claims abstract description 77
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000005266 casting Methods 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 19
- 239000011156 metal matrix composite Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000000853 adhesive Substances 0.000 claims abstract description 12
- 230000001070 adhesive effect Effects 0.000 claims abstract description 12
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 239000011651 chromium Substances 0.000 claims abstract description 11
- 235000019353 potassium silicate Nutrition 0.000 claims description 27
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 27
- 239000004576 sand Substances 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000004321 preservation Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000007790 scraping Methods 0.000 claims description 10
- 229910000617 Mangalloy Inorganic materials 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052810 boron oxide Inorganic materials 0.000 claims description 6
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 6
- 229910052845 zircon Inorganic materials 0.000 claims description 6
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 6
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 239000001488 sodium phosphate Substances 0.000 claims description 4
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 4
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000001764 infiltration Methods 0.000 abstract 1
- 230000008595 infiltration Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 11
- 239000011230 binding agent Substances 0.000 description 8
- 125000004122 cyclic group Chemical group 0.000 description 5
- 229910052903 pyrophyllite Inorganic materials 0.000 description 5
- 238000009472 formulation Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
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- 238000012986 modification Methods 0.000 description 2
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- 239000000758 substrate Substances 0.000 description 2
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- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
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- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
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- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/10—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention discloses a preparation method of a centrifugal casting metal ceramic composite grinding roller for glass fiber industry, belonging to the technical field of ceramic reinforced metal matrix composite materials. Firstly, the TiC hard alloy is arranged in a staggered manner according to a fixed rule and fixed in a ceramic particle preform die, and then ceramic particles, an adhesive and other active powder materials are uniformly mixed and filled between the hard alloy rods to form a network structure. Fixing the solidified ceramic particles/hard alloy prefabricated body in centrifugal casting equipment, pouring high-temperature molten metal, taking out and performing heat treatment to obtain the ceramic particles/hard alloy reinforced metal-based composite grinding roller. The method utilizes the high wear resistance of ceramic particles and hard alloy to improve the overall comprehensive mechanical property of the grinding roller, and avoids the defects of preform clamping and the like caused by insufficient casting and infiltration power. The service life of the high chromium cast iron grinding roller is 5-6 times of that of a common high chromium cast iron grinding roller. The yield of the product is improved, the production cost is reduced, and the wear resistance of the grinding roller is improved.
Description
Technical Field
The invention belongs to the technical field of ceramic reinforced metal matrix composite materials, and particularly relates to a preparation method of a centrifugal casting metal ceramic composite grinding roller for the glass fiber industry.
Background
The ceramic reinforced metal matrix composite is widely applied to various fields such as metallurgy, coal and electricity, mines, building materials, glass fibers and the like due to the excellent wear resistance. In the production process of pyrophyllite micro powder in the glass fiber industry, a grinding roller is a core important component in the grinding process of pyrophyllite ore. The method needs to grind the large pyrophyllite into powder with about 300 meshes to be put into subsequent use. At present, the grinding roller of the vertical mill in the pyrophyllite grinding industry is generally cast by high-chromium cast iron. In the grinding process, the problems of short service cycle, low table type yield and the like of the grinding roller are caused by high hardness and poor grindability of pyrophyllite and high powder fineness requirement, so that the further improvement of the production efficiency and the further reduction of the production cost are severely limited.
The invention patent (CN 105039836A) discloses a roll surface of a high-pressure roll mill and a preparation method thereof, wherein the cast-in roll surface comprises an inner substrate layer and an outer hard alloy ball layer, the substrate layer penetrates into gaps of the outer hard alloy balls, and the high-pressure roll surface produced by the invention has high wear resistance, high hardness, high strength, high toughness and uniform structure. However, the prefabricated sintering is fast, the energy consumption is increased, and the fixing mode of the hard alloy balls is not described, so that the hard alloy balls cannot be uniformly distributed in the prefabricated block.
Chinese patent (CN 104399930 a) discloses a method for centrifugally casting a ceramic-metal honeycomb composite vertical mill roller. The patent fills the pore-forming agent and the adhesive into the mould to prepare the ceramic particle preformed bodies, and then the ceramic particle preformed bodies are spliced in pairs and fixed into the movable block metal mould. And fixing the movable block metal mold and pouring molten metal into centrifugal casting equipment. The grinding roller prepared by the patent can improve the yield and reduce the production cost. However, the patent does not consider the wear resistance of the metal posts in the ceramic preform, and the metal post portions can form pits during use, shortening the overall service life of the grinding roller.
Disclosure of Invention
The invention aims to: the invention aims to solve the defects in the prior art, and provides a preparation method of a centrifugal casting metal ceramic composite grinding roller for glass fiber industry, wherein the wear resistance of the grinding roller is 5-6 times that of a common high-chromium cast iron grinding roller, and the problem of insufficient wear resistance of a metal column in the conventional ceramic particle reinforced metal matrix composite grinding roller is solved.
The technical scheme is as follows: the invention relates to a preparation method of a centrifugal casting metal ceramic composite grinding roller for glass fiber industry, which comprises the following steps:
firstly, regularly staggering TiC hard alloy rods, fixing the TiC hard alloy rods into a ceramic particle preform mold, uniformly mixing ceramic particles, an adhesive and formula powder, filling the ceramic particles into the ceramic particle preform mold, and curing to obtain ceramic particles/hard alloy preforms;
In some embodiments, the TiC cemented carbide rod in step 1 comprises the following components in weight percent: tiC:93.0-96.0%; mn:1.5-2.0%; mo:1.5-2.4%; ni:1.0-1.4%; co:1.0-1.4%; zr:0.5-0.8%; the balance being Fe. Furthermore, the TiC hard alloy rod adopts a vacuum sintering process, and 3-6 circular rings are uniformly distributed on the periphery of the hard alloy rod along the axial direction, so that the TiC hard alloy rod can be tightly embedded and fixed after being mixed with ceramic particles, and the hard alloy is prevented from falling off in the casting process.
In some embodiments, the TiC hard alloy rods are manufactured by a vacuum sintering process, the diameter is phi 5-phi 10mm, and the distance between every two hard alloy rods is 16-25mm. The wear resistance of the grinding roller can be fully exerted to the greatest extent by the placement mode. At the same time, the hard alloy cannot break under cyclic stress under the size.
In some embodiments, the ceramic particles in the step 1 are mixed by one or more of ZTA, WC, tiC, al2O3 and TiO2, and the particle size of the further ceramic particles is 6-12mm.
In some embodiments, the binder in the step 1 is one or more of silica sol, alumina sol, water glass and sodium phosphate, and the amount of the binder is 13% -16% of the weight of the weighed ceramic particles.
In some embodiments, the formula in step 1 comprises the following components in weight percent: 70-75% of atomized iron powder, 10-15% of titanium dioxide, 4-6% of zirconium oxide, 4-5% of boron oxide, 8-12% of nickel powder and 1-2% of titanium powder. Further, the weight of the formula powder is 10-14% of the weight of the weighed ceramic particles, and the granularity of the formula powder is 0.01-0.04mm.
In some embodiments, the step 2 specifically adopts a centrifugal casting molding process, a centrifugal casting mold adopts a metal mold, a water glass sand heat insulation layer with the thickness of 20-30mm is uniformly covered on the inner side of the mold, the mixed water glass sand is put into the mold, and then the equipment operates at the rotating speed of 300-550 r/min; and in the running process of the equipment, baking the inside by using flame to promote the water glass sand to solidify, stopping the equipment after running for 20-30 minutes, scraping the water glass sand protruding from the inner side by using a scraper, finally uniformly coating zircon powder coating, drying, and repeating the coating for 3 times.
In some embodiments, the fixing manner of the ceramic particles/hard alloy prefabricated bodies in the step 2 is that round steel is adopted for supporting and fixing every two adjacent prefabricated bodies, and the two ends of the round steel are welded with net-shaped porous plates, so that the opposite prefabricated bodies can be ensured to be stable, and the flowing capability of molten metal can not be influenced.
In some embodiments, the step 3 specifically includes: preheating the metal mold and the whole prefabricated body before casting, wherein the preheating temperature is 200-500 ℃, and controlling the rotation of centrifugal equipment 3-10 minutes before casting, wherein the rotating speed is 600-850r/min; pouring high-temperature molten metal, continuously operating the equipment until the molten metal is cooled to 850-1050 ℃, stopping operating the equipment, closing a pouring channel, preserving heat for 24 hours, and demoulding; and then placing the grinding roller into a heat preservation furnace, heating up to 300-550 ℃ at 15-30 ℃/h, preserving heat for 3-6 hours, and finally air-cooling to room temperature to prepare the ceramic particle/hard alloy reinforced metal matrix composite grinding roller.
In some embodiments, the high-temperature molten metal in the step 3 is one or a mixture of two of high-chromium cast iron and high-manganese steel in any proportion. The preferable high chromium cast iron comprises the following components: c:3.3-3.5%, mn:1.5-2.0%, cr:30-32%, ni:1.5-2.2%, and the balance of Fe. The preferable components of the high manganese steel are: c:1.2-1.8%, mn:17-19%, si:0.8-1.3%, and the balance of Fe.
The beneficial effects are that: the beneficial effects of the invention are as follows:
(1) The wear resistance of the ceramic particle/hard alloy reinforced metal matrix composite grinding roller is 5-6 times that of a common high-chromium cast iron grinding roller, so that the problem of insufficient wear resistance of a metal column in the conventional ceramic particle reinforced metal matrix composite grinding roller is solved;
(2) The centrifugal casting process is used, so that motive power can be effectively provided for the penetration of the molten metal into the pores among ceramic particles, the problem of poor penetration of a preform is avoided, meanwhile, the integral wear resistance of the grinding roller is improved by the hard alloy/metal area, and the ceramic particles/metal area can provide certain toughness for the grinding roller;
(3) The centrifugal casting process adopted by the invention greatly increases the product rate and reduces the waste of non-renewable resources;
(4) The invention adopts a reasonable insert casting process, so that the matrix material and the ceramic particles and the matrix material and the hard alloy have perfect interface combination. The two materials have obvious inter-diffusion areas to form metallurgical bonding;
(5) The invention has simple process operation and stable and reliable quality.
Drawings
FIG. 1 is a schematic view of a ceramic particle/TiC cemented carbide preform according to one embodiment of the present invention;
FIG. 2 is a schematic view showing a structure of a preform fixing manner in a mold according to an embodiment of the present invention;
fig. 3 is a schematic view of a ceramic particle/cemented carbide reinforced metal matrix composite abrasive roll structure in accordance with one embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. are the directions or positional relationships shown, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
Example 1
A preparation method of a centrifugal casting metal ceramic composite grinding roller for glass fiber industry comprises the following steps:
In this embodiment, the TiC cemented carbide rod in this step comprises the following components in weight percent:
TiC:93.00%; mn:1.5%; mo:1.5%; ni:1.0%; co:1.0%; zr:0.5%; the balance being Fe.
Further preferably in this embodiment, the TiC cemented carbide rod is sintered by vacuum, and has a diameter of Φ5- Φ10mm. As shown in figure 1, the periphery of the hard alloy rod is uniformly distributed with 3-6 circular rings along the axial direction, and the purpose of the hard alloy rod is to be tightly embedded and fixed after being mixed with ceramic particles, so that the hard alloy is prevented from falling off in the casting process.
Further preferably in this embodiment, the distance between every two TiC cemented carbide rods in this step is preferably 16-25mm, and this placement makes it possible to fully exploit the wear resistance of the grinding roller to the maximum extent. At the same time, the hard alloy cannot break under cyclic stress under the size.
In this embodiment, ZTA is used for the ceramic particles, and the ceramic particles preferably have a particle diameter of 6 to 12mm.
In this embodiment, the binder is silica sol and the amount of binder is 13% by weight of the ceramic particles.
In this embodiment, the formulation comprises the following components in weight percent:
70% of atomized iron powder, 11% of titanium dioxide, 4% of zirconium oxide, 5% of boron oxide, 9% of nickel powder and 1% of titanium powder.
Further preferred in this example is a formula weight of 10% of the weight of the weighed ceramic particles and a formula particle size of 0.01-0.04mm.
And 2, as shown in fig. 2, the ceramic particles/hard alloy prefabricated bodies 3 obtained in the step 1 are circumferentially arranged and fixed in a centrifugal casting mold 5, and every two opposite ceramic particles/hard alloy prefabricated bodies 3 are fixed.
In the embodiment, the step specifically adopts a centrifugal casting molding process, a centrifugal casting mold adopts a metal mold, a water glass sand heat preservation layer 4 with the thickness of 20mm is uniformly covered on the inner side of the mold, the mixed water glass sand is put into the mold, and then the equipment operates at the rotating speed of 300 r/min; and in the running process of the equipment, baking the inside by using flame to promote the water glass sand to solidify, stopping the equipment after running for 20 minutes, scraping the water glass sand protruding from the inner side by using a scraping plate, finally uniformly coating zircon powder coating, drying, and repeating the coating for 3 times to ensure the appearance quality of the product.
In this embodiment, as shown in fig. 2, the ceramic particles/cemented carbide preforms 3 are fixed by supporting and fixing every two adjacent preforms with a round steel 6, and the two ends of the round steel 6 are welded with a mesh porous plate, so that the opposite preforms can be stabilized, and the flow capacity of the molten metal is not affected.
In this embodiment, the specific step of step 3 includes:
preheating a metal mold and the whole prefabricated body before casting, wherein the preheating temperature is 200 ℃, and controlling centrifugal equipment to rotate 3 minutes before casting, wherein the rotating speed is 600r/min; pouring high-temperature molten metal, continuously operating the equipment until the molten metal is cooled to 850 ℃, stopping operating the equipment, closing a pouring channel, preserving heat for 24 hours, and demoulding; and then placing the grinding roller into a heat preservation furnace, heating up to 300 ℃ at 15 ℃/h, preserving heat for 3 hours, and finally air-cooling to room temperature to prepare the ceramic particle/hard alloy reinforced metal matrix composite grinding roller.
In the present embodiment, the high-temperature molten metal is high-chromium cast iron.
In the present embodiment, the high-temperature molten metal is preferably high-chromium cast iron, and the composition is: c:3.3%, mn:1.5%, cr:31%, ni:1.6% and the balance of Fe.
Example 2
A preparation method of a centrifugal casting metal ceramic composite grinding roller for glass fiber industry comprises the following steps:
In this embodiment, the TiC cemented carbide rod in this step comprises the following components in weight percent:
TiC:94.0%; mn:1.5%; mo:1.8%; ni:1.1%; co:1.0%; zr:0.5%; the balance being Fe.
In this embodiment, preferably, the TiC carbide rod is vacuum sintered with diameter of Φ5- Φ10mm, and the periphery of the carbide rod is uniformly distributed with 3-6 rings along the axial direction, so that the TiC carbide rod can be tightly embedded after being mixed with ceramic particles, and the carbide is prevented from falling off in the casting process.
Further preferably in this embodiment, the distance between every two TiC cemented carbide rods in this step is preferably 16-25mm, and this placement makes it possible to fully exploit the wear resistance of the grinding roller to the maximum extent. At the same time, the hard alloy cannot break under cyclic stress under the size.
In this embodiment, the ceramic particles are mixed by ZTA and WC, and the particle size of the ceramic particles is preferably 6-12mm.
In this embodiment, the binder is an alumina sol and the binder is used in an amount of 14% by weight of the ceramic particles.
In this embodiment, the formulation comprises the following components in weight percent:
72% of atomized iron powder, 11% of titanium dioxide, 4% of zirconium oxide, 4% of boron oxide, 8% of nickel powder and 1% of titanium powder.
Further preferred in this example is a formula weight of 11% by weight of the weighed ceramic particles and a formula particle size of 0.01-0.04mm.
And 2, circumferentially arranging the ceramic particles/hard alloy prefabricated bodies obtained in the step 1 and fixing the ceramic particles/hard alloy prefabricated bodies in a centrifugal casting mold, wherein every two opposite ceramic particles/hard alloy prefabricated bodies are fixed.
In the embodiment, the step specifically adopts a centrifugal casting molding process, a centrifugal casting mold adopts a metal mold, a water glass sand heat insulation layer with the thickness of 23mm is uniformly covered on the inner side of the mold, the mixed water glass sand is put into the mold, and then the equipment operates at the rotating speed of 350 r/min; and in the running process of the equipment, baking the inside by using flame to promote the water glass sand to solidify, stopping the equipment after running for 25 minutes, scraping the water glass sand protruding from the inner side by using a scraping plate, finally uniformly coating zircon powder coating, drying, and repeating the coating for 3 times to ensure the appearance quality of the product.
In the embodiment, the ceramic particles/hard alloy prefabricated bodies are fixed in the mode of supporting and fixing every two adjacent prefabricated bodies by adopting round steel, and the two ends of the round steel are welded with net-shaped porous plates, so that the opposite prefabricated bodies can be stabilized, and the flowing capability of molten metal can not be influenced.
In this embodiment, the specific step of step 3 includes:
preheating the metal mold and the whole prefabricated body before casting, wherein the preheating temperature is 300 ℃, and controlling the centrifugal equipment to rotate 5 minutes before casting, wherein the rotating speed is 650r/min; pouring high-temperature molten metal, continuously operating the equipment until the molten metal is cooled to 900 ℃, stopping operating the equipment, closing a pouring channel, preserving heat for 24 hours, and demoulding; and then placing the grinding roller into a heat preservation furnace, heating at 20 ℃/h, preserving heat for 4 hours at 350 ℃, and finally air-cooling to room temperature to prepare the ceramic particle/hard alloy reinforced metal matrix composite grinding roller.
In this embodiment, the high-temperature molten metal is high manganese steel.
Further preferred components of the high manganese steel are: c:1.4%, mn:18%, si:1.0% and the balance of Fe.
Example 3
A preparation method of a centrifugal casting metal ceramic composite grinding roller for glass fiber industry comprises the following steps:
In this embodiment, the TiC cemented carbide rod in this step comprises the following components in weight percent:
TiC:93.5%; mn:1.5%; mo:1.5%; ni:1.2%; co:1.0%; zr:0.8%; the balance being Fe.
In this embodiment, preferably, the TiC carbide rod is vacuum sintered with diameter of Φ5- Φ10mm, and the periphery of the carbide rod is uniformly distributed with 3-6 rings along the axial direction, so that the TiC carbide rod can be tightly embedded after being mixed with ceramic particles, and the carbide is prevented from falling off in the casting process.
Further preferably in this embodiment, the distance between every two TiC cemented carbide rods in this step is preferably 16-25mm, and this placement makes it possible to fully exploit the wear resistance of the grinding roller to the maximum extent. At the same time, the hard alloy cannot break under cyclic stress under the size.
In this embodiment, the ceramic particles are mixed by using ZTA, WC, ti, and the particle size of the ceramic particles is preferably 6 to 12mm.
In this embodiment, the binder is a mixture of water glass and sodium phosphate, and the amount of binder is 15% of the weight of the ceramic particles.
In this embodiment, the formulation comprises the following components in weight percent:
72% of atomized iron powder, 10% of titanium dioxide, 4% of zirconium oxide, 4% of boron oxide, 9% of nickel powder and 1% of titanium powder.
Further preferred in this example is a formula weight of 13% by weight of the weighed ceramic particles and a formula particle size of 0.01-0.04mm.
And 2, circumferentially arranging the ceramic particles/hard alloy prefabricated bodies obtained in the step 1 and fixing the ceramic particles/hard alloy prefabricated bodies in a centrifugal casting mold, wherein every two opposite ceramic particles/hard alloy prefabricated bodies are fixed.
In the embodiment, the step specifically adopts a centrifugal casting molding process, a centrifugal casting mold adopts a metal mold, a water glass sand heat insulation layer with the thickness of 26mm is uniformly covered on the inner side of the mold, the mixed water glass sand is put into the mold, and then the equipment operates at the rotating speed of 500 r/min; and in the running process of the equipment, baking the inside by using flame to promote the water glass sand to solidify, stopping the equipment after 26 minutes of running, scraping the water glass sand protruding from the inner side by using a scraping plate, finally uniformly coating zircon powder coating, drying, and repeating the coating for 3 times to ensure the appearance quality of the product.
In the embodiment, the ceramic particles/hard alloy prefabricated bodies are fixed in the mode of supporting and fixing every two adjacent prefabricated bodies by adopting round steel, and the two ends of the round steel are welded with net-shaped porous plates, so that the opposite prefabricated bodies can be stabilized, and the flowing capability of molten metal can not be influenced.
In this embodiment, the specific step of step 3 includes:
preheating a metal mold and the whole prefabricated body before casting, wherein the preheating temperature is 400 ℃, and controlling centrifugal equipment to rotate for 8 minutes before casting, wherein the rotating speed is 750r/min; pouring high-temperature molten metal, continuously operating the equipment until the molten metal is cooled to 950 ℃, stopping operating the equipment, closing a pouring channel, preserving heat for 24 hours, and demoulding; and then placing the grinding roller into a heat preservation furnace, heating up to 450 ℃ at a speed of 25 ℃/h, preserving heat for 5 hours, and finally air-cooling to room temperature to prepare the ceramic particle/hard alloy reinforced metal matrix composite grinding roller.
In the present embodiment, the high-temperature molten metal is high-chromium cast iron.
In the present embodiment, the high-temperature molten metal preferably comprises the following components: c:3.4%, mn:1.8%, cr:31%, ni:2.2% and the balance of Fe.
Example 4
A preparation method of a centrifugal casting metal ceramic composite grinding roller for glass fiber industry comprises the following steps:
In this embodiment, the TiC cemented carbide rod in this step comprises the following components in weight percent:
TiC:93.0%; mn:1.8%; mo:1.5%; ni:1.2%; co:1.2%; zr:0.8%; the balance being Fe.
In this embodiment, preferably, the TiC carbide rod is vacuum sintered with diameter of Φ5- Φ10mm, and the periphery of the carbide rod is uniformly distributed with 3-6 rings along the axial direction, so that the TiC carbide rod can be tightly embedded after being mixed with ceramic particles, and the carbide is prevented from falling off in the casting process.
Further preferably in this embodiment, the distance between every two TiC cemented carbide rods in this step is preferably 16-25mm, and this placement makes it possible to fully exploit the wear resistance of the grinding roller to the maximum extent. At the same time, the hard alloy cannot break under cyclic stress under the size.
In this embodiment, the ceramic particles are mixed with both Al2O3 and TiO2, and the particle diameter of the ceramic particles is preferably 6 to 12mm.
In the embodiment, the adhesive is prepared by mixing three of silica sol, alumina sol and sodium phosphate, and the dosage of the adhesive is 16% of the weight of the weighed ceramic particles.
In this embodiment, the formulation comprises the following components in weight percent:
70% of atomized iron powder, 10% of titanium dioxide, 4% of zirconium oxide, 4% of boron oxide, 10% of nickel powder and 2% of titanium powder.
Further preferred in this example is a formula weight of 14% of the weight of the weighed ceramic particles and a formula particle size of 0.01-0.04mm.
And 2, circumferentially arranging the ceramic particles/hard alloy prefabricated bodies obtained in the step 1 and fixing the ceramic particles/hard alloy prefabricated bodies in a centrifugal casting mold, wherein every two opposite ceramic particles/hard alloy prefabricated bodies are fixed.
In the embodiment, the step specifically adopts a centrifugal casting molding process, a centrifugal casting mold adopts a metal mold, a water glass sand heat insulation layer with the thickness of 30mm is uniformly covered on the inner side of the mold, the mixed water glass sand is put into the mold, and then the equipment operates at the rotating speed of 550 r/min; and in the running process of the equipment, baking the inside by using flame to promote the water glass sand to solidify, stopping the equipment after running for 30 minutes, scraping the water glass sand with the raised inner side by using a scraping plate, finally uniformly coating zircon powder coating, drying, and repeating the coating for 3 times to ensure the appearance quality of the product.
In the embodiment, the ceramic particles/hard alloy prefabricated bodies are fixed in the mode of supporting and fixing every two adjacent prefabricated bodies by adopting round steel, and the two ends of the round steel are welded with net-shaped porous plates, so that the opposite prefabricated bodies can be stabilized, and the flowing capability of molten metal can not be influenced.
In this embodiment, the specific step of step 3 includes:
preheating the metal mold and the whole prefabricated body before casting, wherein the preheating temperature is 500 ℃, and controlling the centrifugal equipment to rotate for 10 minutes before casting, wherein the rotating speed is 850r/min; pouring high-temperature molten metal, continuously operating the equipment until the molten metal is cooled to 1050 ℃, stopping operating the equipment, closing a pouring channel, preserving heat for 24 hours, and demoulding; and then placing the grinding roller into a heat preservation furnace, heating at 30 ℃/h, preserving heat for 6 hours at 550 ℃, and finally air-cooling to room temperature to prepare the ceramic particle/hard alloy reinforced metal matrix composite grinding roller.
In the present embodiment, the high-temperature molten metal is high manganese steel
Further preferred components of the high manganese steel are: c:1.8%, mn: 19%, si:1.2% and the balance of Fe.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the invention.
Claims (10)
1. A preparation method of a centrifugal casting metal ceramic composite grinding roller for glass fiber industry is characterized by comprising the following steps: the method comprises the following steps:
firstly, regularly staggering TiC hard alloy rods, fixing the TiC hard alloy rods into a ceramic particle preform mold, uniformly mixing ceramic particles, an adhesive and formula powder, filling the ceramic particles into the ceramic particle preform mold, and curing to obtain ceramic particles/hard alloy preforms;
step 2, arranging the ceramic particles/hard alloy prefabricated bodies obtained in the step 1 circumferentially and fixing the ceramic particles/hard alloy prefabricated bodies in a centrifugal casting mold, wherein every two opposite ceramic particles/hard alloy prefabricated bodies are fixed;
step 3, integrally preheating the centrifugal casting die and the prefabricated body in the step 2, and placing the die and the prefabricated body in centrifugal equipment for rotation before casting; pouring high-temperature molten metal, continuously operating the equipment until the molten metal is cooled, stopping operating the equipment, closing a pouring channel, preserving heat, and demolding; and then placing the grinding roller into a heat preservation furnace for heating, preserving heat after the temperature is reached to a certain temperature, and finally air-cooling to room temperature to prepare the ceramic particle/hard alloy reinforced metal matrix composite grinding roller.
2. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is disclosed in claim 1, is characterized in that: the TiC hard alloy rod in the step 1 comprises the following components in percentage by weight: tiC:93.0-96.0%; mn:1.5-2.0%; mo:1.5-2.4%; ni:1.0-1.4%; co:1.0-1.4%; zr:0.5-0.8%; the balance being Fe.
3. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is characterized by comprising the following steps of: the TiC hard alloy rods are manufactured by adopting a vacuum sintering process, the diameter is phi 5-phi 10mm, and the distance between every two hard alloy rods is 16-25mm.
4. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is disclosed in claim 1, is characterized in that: the ceramic particles in the step 1 are mixed by one or more of ZTA, WC, tiC, al2O3 and TiO 2.
5. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is disclosed in claim 1, is characterized in that: the adhesive in the step 1 is one or more of silica sol, alumina sol, water glass and sodium phosphate, and the dosage of the adhesive is 13-16% of the weight of the weighed ceramic particles.
6. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is disclosed in claim 1, is characterized in that: the formula powder in the step 1 comprises the following components in percentage by weight: 70-75% of atomized iron powder, 10-15% of titanium dioxide, 4-6% of zirconium oxide, 4-5% of boron oxide, 8-12% of nickel powder and 1-2% of titanium powder.
7. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is disclosed in claim 1, is characterized in that: the step 2 is to adopt a centrifugal casting molding process, a centrifugal casting mold adopts a metal mold, a water glass sand heat-insulating layer with the thickness of 20-30mm is uniformly covered on the inner side of the mold, the mixed water glass sand is put into the mold, and then the equipment operates at the rotating speed of 300-550 r/min; and in the running process of the equipment, baking the inside by using flame to promote the water glass sand to solidify, stopping the equipment after running for 20-30 minutes, scraping the water glass sand protruding from the inner side by using a scraper, finally uniformly coating zircon powder coating, drying, and repeating the coating for 3 times.
8. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is disclosed in claim 1, is characterized in that: in the step 2, the ceramic particles/hard alloy prefabricated bodies are fixed in a mode of adopting round steel to support and fix every two prefabricated bodies, and two ends of the round steel are welded with a reticular porous plate.
9. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is disclosed in claim 1, is characterized in that: the step 3 specifically includes: preheating the metal mold and the whole prefabricated body before casting, wherein the preheating temperature is 200-500 ℃, and controlling the rotation of centrifugal equipment 3-10 minutes before casting, wherein the rotating speed is 600-850r/min; pouring high-temperature molten metal, continuously operating the equipment until the molten metal is cooled to 850-1050 ℃, stopping operating the equipment, closing a pouring channel, preserving heat for 24 hours, and demoulding; and then placing the grinding roller into a heat preservation furnace, heating up to 300-550 ℃ at 15-30 ℃/h, preserving heat for 3-6 hours, and finally air-cooling to room temperature to prepare the ceramic particle/hard alloy reinforced metal matrix composite grinding roller.
10. The method for preparing the centrifugal casting metal ceramic composite grinding roller for the glass fiber industry, which is disclosed in claim 1, is characterized in that: the high-temperature molten metal in the step 3 is one or two mixed liquids of high-chromium cast iron and high-manganese steel in any proportion.
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