CN112811889A - Wear-resistant ceramic roller and preparation method thereof - Google Patents
Wear-resistant ceramic roller and preparation method thereof Download PDFInfo
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- CN112811889A CN112811889A CN202110230695.2A CN202110230695A CN112811889A CN 112811889 A CN112811889 A CN 112811889A CN 202110230695 A CN202110230695 A CN 202110230695A CN 112811889 A CN112811889 A CN 112811889A
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- F27—FURNACES; KILNS; OVENS; RETORTS
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Abstract
The invention relates to a wear-resistant ceramic roller, which comprises a ceramic roller body and a supporting body, wherein the supporting body comprises an outer transverse reinforcing rib, an inner supporting ring and a connecting column; the ceramic roller body is prepared from the following wear-resistant ceramic mixed raw materials by adding water into the wear-resistant ceramic mixed materials and stirring the mixture into pug, and pugging the pug by a direct-push pug mill to obtain pug strips; placing into a mold with an inner support body, performing extrusion molding, and drying; then carrying out cold isostatic pressing process treatment; and then transferring the mixture into a high-temperature nitrogen furnace to sinter under the protection of flowing nitrogen, and obtaining the wear-resistant ceramic roller after reaction and cooling. The wear-resistant ceramic roller has good wear resistance and high strength, can still maintain good stability and weather resistance when used at different temperatures, and has long service life. The preparation method is simple, strong in controllability and high in production efficiency. The wear-resistant ceramic roller product has the fire-resistant temperature of over 1800 ℃ and the Mohs hardness of 8.
Description
Technical Field
The invention belongs to the technical field of ceramic rollers, and particularly relates to a wear-resistant ceramic roller and a preparation method thereof.
Background
The ceramic roller is installed in the roller kiln, is used for bearing and transmitting the magnetic blank to be fired, is one of the main vulnerable parts frequently replaced in the roller kiln, and the quality of the ceramic roller directly influences the normal operation of the kiln and the yield and quality of the produced products.
When the existing ceramic roller is used, the abrasion resistance of the surface of the ceramic roller is reduced due to continuous friction between the ceramic roller and a transmission product, so that the product transmission effect is influenced. Common ceramic materials include clay, alumina, kaolin and the like, the ceramic materials generally have higher hardness but poorer plasticity, and besides being used for tableware and decoration, the ceramic also plays an important role in the development of science and technology, the ceramic raw materials are extracted from a large amount of clay which is the original resource of the earth, and the clay has toughness and can be plasticized when meeting water at normal temperature, can be slightly dried for carving and can be completely dried for grinding; when the mixture is burnt to 700 ℃, the pottery can be made into pottery which can be filled with water; when the ceramic material is burnt to 1230 ℃, the ceramic material is vitrified, almost completely does not absorb water, and is high-temperature resistant and corrosion resistant. The harder the ceramic material, the better its wear resistance, the higher the hardness, the lower the impact toughness and the more brittle the material. The wear resistance of the existing ceramic material is improved compared with that of hard alloy, but the wear resistance of the existing ceramic material is still required to be improved when a high-precision complex part is processed, so that the problem to be solved at present is that a ceramic roller with high wear resistance is urgently needed.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a preparation method of a wear-resistant ceramic roller, which has the advantages of simple process, strong controllability, low cost, high production efficiency, environmental protection and capability of producing an aluminum-silicon alloy plate material with wear resistance, high strength, high toughness and light weight.
The technical scheme adopted by the invention is as follows: the invention provides a wear-resistant ceramic roller which comprises a ceramic roller body and a support body, wherein the support body comprises an outer transverse reinforcing rib, an inner support ring and a connecting column; the ceramic roller body is of an internal hollow structure, the internal support ring is arranged inside the ceramic roller body, a strip-shaped notch is formed in the outer surface wall of the ceramic roller body along the length direction, a connecting column is welded on the outer surface wall of the internal support ring, the connecting column penetrates through the ceramic roller body and extends to the inside of the strip-shaped notch, an external transverse reinforcing rib is bonded inside the strip-shaped notch, and the external transverse reinforcing rib is welded and fixed with the connecting column; the outer transverse reinforcing ribs are arranged in three numbers, the three outer transverse reinforcing ribs are respectively annular, the space between every two adjacent outer transverse reinforcing ribs is equal, the outer transverse reinforcing ribs are rectangular, and the thickness of each outer transverse reinforcing rib is smaller than the depth of each strip-shaped notch; the ceramic roller body is prepared from the following wear-resistant ceramic powder raw materials in parts by weight:
90-120 parts of silicon micropowder
15-20 parts of barium carbonate
7-12 parts of titanium diboride
10-15 parts of aluminum nitride
10-15 parts of boron nitride
3-8 parts of zirconium oxide
9-13 parts of silicon nitride
8-12 parts of talcum powder
3-8 parts of ceramic powder
5-8 parts of silicon carbide
3-5 parts of sodium bicarbonate
2-5 parts of antimony trioxide
5-10 parts of a binding agent.
Further, the silicon micropowder is sub-nanometer spherical silicon micropowder.
Further, the bonding agent consists of the following components in parts by weight: 6-10 parts of ethyl acetate, 3-5 parts of water-based resin polyacrylamide and 5-8 parts of polyethylene glycol.
Further, the ceramic powder is powder of muscovite, magnesium aluminate spinel and calcite.
Further, the mass ratio of the muscovite powder to the magnesium aluminate spinel powder to the calcite powder is 6:3: 2.
Further, the preparation method of the silicon micropowder comprises the following steps: (a) silicon powder grinding: high-purity silicon powder is selected to be immersed into grinding fluid, the silicon powder is ground on a grinding disc for 4 hours to obtain fine silicon powder, and the fine silicon powder is thoroughly cleaned to remove the grinding fluid; (b) screening: screening fine silicon powder by adopting a multi-stage sieve tray, and then selecting 200-mesh and 300-mesh fine silicon powder to be placed into a plasma reaction furnace; (c) pre-reaction: vacuumizing the plasma reaction furnace to 1-3 Pa, then electrifying and heating to 450-500 ℃, and keeping for 12-16 min; (d) reaction: introducing inert protective gas into the plasma reaction furnace, then heating to 1450-1500 ℃, and rapidly introducing oxygen after the fine silicon powder is melted and kept for 8-12 min; (e) and (3) cooling: the melted fine silicon powder after being charged with oxygen is quickly changed into silicon dioxide dust, and is taken into a quencher by an induced draft device for cooling to form spherical particles, and cyclone dust collection is carried out to obtain the silicon powder.
Further, the inert shielding gas in the step (d) is argon.
Further, the temperature rise process of the plasma reaction furnace in the step (d) is as follows: heating at a rate of 15-20 deg.C/min, 7.5-12 deg.C/min, and 3-5 deg.C/min.
Further, the preparation method of the wear-resistant ceramic roller comprises the following steps: (1) weighing silicon micropowder, barium carbonate, titanium diboride, aluminum nitride, boron nitride, zirconium oxide, silicon nitride, talcum powder, ceramic powder, silicon carbide, sodium bicarbonate and antimony trioxide according to the weight parts of the formula, adding the materials into a high-pressure homogenizer, uniformly mixing, and fully ball-milling to obtain a wear-resistant ceramic powder mixture; (2) adding a binding agent into the wear-resistant ceramic powder mixture obtained in the step (1) in an inert atmosphere, stirring for 15-20min, heating to 140-; (3) adding water into the mixture obtained in the step (2), and stirring the mixture in a powerful stirrer to form a pug, wherein the water content of the pug is controlled to be 10-18%; refining the mud through a direct-push type pug refiner to obtain mud strips; (4) placing the mud strips into a die with an inner support body, and performing extrusion molding to obtain a ceramic roller blank tube with the inner support body; (5) drying the ceramic roller blank tube provided with the inner support; maintaining the pressure of the dried ceramic roller blank tube provided with the inner support for 30min under the pressure of 100-300 Mpa, and carrying out cold isostatic pressing process treatment; (6) and transferring the ceramic roller rod blank pipe which is subjected to the cold isostatic pressing treatment and provided with the inner support into a high-temperature nitrogen furnace, preserving the heat for 25-35min at the temperature of 1000-.
Furthermore, the fire-resistant temperature of the wear-resistant ceramic roller product is above 1800 ℃, and the Mohs hardness can reach 8.
The invention has the beneficial effects that:
(1) according to the wear-resistant ceramic roller, the supporting body is arranged in the ceramic roller body, the strip-shaped notch is formed in the outer part of the ceramic roller body, the outer transverse reinforcing rib is arranged in the strip-shaped notch, and the inner supporting ring and the outer transverse reinforcing rib are arranged, so that the inner part and the outer part of the ceramic roller body can be compositely reinforced, and the strength of the ceramic roller body is improved in a maximized manner; the ceramic roller body disclosed by the invention is reasonable in formula design, is prepared from the wear-resistant ceramic powder, has good wear resistance, can still keep good stability and weather resistance when used at different temperatures, is long in service life, and has the advantages of wear resistance, high hardness, small thermal expansion coefficient, good thermal stability, good chemical corrosion resistance, high dielectric property and the like. The preparation method of the wear-resistant ceramic roller is simple, strong in controllability, high in production efficiency and environment-friendly. The wear-resistant ceramic roller product has the fire-resistant temperature of over 1800 ℃ and the Mohs hardness of 8.
Drawings
FIG. 1 is a schematic structural view of a wear-resistant ceramic roll according to the present invention;
FIG. 2 is a schematic cross-sectional view of a wear-resistant ceramic roller according to the present invention;
FIG. 3 is a schematic structural view of a support body of the wear-resistant ceramic roller of the present invention;
in the figure: 1 ceramic roller body, 2 bar-shaped gaps, 3 outer transverse reinforcing ribs, 4 inner supporting rings and 5 connecting columns.
Detailed Description
The invention will be further elucidated by means of several specific examples, which are intended to be illustrative only and not limiting.
Example 1:
a wear-resistant ceramic roller comprises a ceramic roller body 1 and a support body, wherein the support body comprises an outer transverse reinforcing rib 3, an inner support ring 4 and a connecting column 5; the ceramic roller body 1 is of a hollow structure, the inner support ring 4 is arranged inside the ceramic roller body 1, a strip-shaped notch 2 is formed in the outer surface wall of the ceramic roller body 1 along the length direction, a connecting column 5 is welded on the outer surface wall of the inner support ring 4, the connecting column 5 penetrates through the ceramic roller body 1 and extends to the inside of the strip-shaped notch 2, an outer transverse reinforcing rib 3 is bonded inside the strip-shaped notch 2, and the outer transverse reinforcing rib 3 is welded and fixed with the connecting column 5; the number of the outer transverse reinforcing ribs 3 is three, the three outer transverse reinforcing ribs 3 are respectively annular, the distance between every two adjacent outer transverse reinforcing ribs 3 is equal, the outer transverse reinforcing ribs 3 are rectangular, and the thickness of each outer transverse reinforcing rib 3 is smaller than the depth of each strip-shaped notch 2; the ceramic roller body 1 is prepared from the following wear-resistant ceramic powder raw materials in parts by weight:
100 portions of silicon micropowder
15 portions of barium carbonate
10 portions of titanium diboride
12 parts of aluminum nitride
10 portions of boron nitride
6 parts of zirconium oxide
12 parts of silicon nitride
8 portions of talcum powder
6 parts of ceramic powder
7 parts of silicon carbide
5 portions of sodium bicarbonate
3 parts of antimony trioxide
8 parts of a binding agent.
Further, the silicon micropowder is sub-nanometer spherical silicon micropowder.
Further, the bonding agent consists of the following components in parts by weight: 8 parts of ethyl acetate, 4 parts of water-based resin polyacrylamide and 5 parts of polyethylene glycol.
Further, the ceramic powder is powder of muscovite, magnesium aluminate spinel and calcite.
Further, the mass ratio of the muscovite powder to the magnesium aluminate spinel powder to the calcite powder is 6:3: 2.
Further, the preparation method of the silicon micropowder comprises the following steps: (a) silicon powder grinding: high-purity silicon powder is selected to be immersed into grinding fluid, the silicon powder is ground on a grinding disc for 4 hours to obtain fine silicon powder, and the fine silicon powder is thoroughly cleaned to remove the grinding fluid; (b) screening: screening fine silicon powder by adopting a multi-stage sieve tray, and then selecting 200-mesh and 300-mesh fine silicon powder to be placed into a plasma reaction furnace; (c) pre-reaction: vacuumizing the plasma reaction furnace to 1-3 Pa, then electrifying and heating to 480 ℃, and keeping for 15 min; (d) reaction: introducing inert protective gas into the plasma reaction furnace, heating to 1500 ℃, and rapidly introducing oxygen after the fine silicon powder is molten and kept for 10 min; (e) and (3) cooling: the melted fine silicon powder after being charged with oxygen is quickly changed into silicon dioxide dust, and is taken into a quencher by an induced draft device for cooling to form spherical particles, and then the silicon powder is obtained by cloth bag, cyclone or electrostatic dust collection.
Further, the inert protective gas is argon.
Further, the temperature rise process of the plasma reaction furnace in the step (d) is as follows: heating at a rate of 15-20 deg.C/min, 7.5-12 deg.C/min, and 3-5 deg.C/min.
Further, (1) weighing silicon micropowder, barium carbonate, titanium diboride, aluminum nitride, boron nitride, zirconium oxide, silicon nitride, talcum powder, ceramic powder, silicon carbide, sodium bicarbonate and antimony trioxide according to the weight parts of the formula, adding the materials into a high-pressure homogenizer, uniformly mixing, and fully ball-milling to obtain a mixture; (2) adding a binding agent into the mixture obtained in the step (1) in an inert atmosphere, stirring for 18min, heating to 145 ℃, and carrying out heat preservation reaction for 35 min; (3) adding water into the mixture obtained in the step (2), and stirring the mixture in a powerful stirrer to form a pug, wherein the water content of the pug is controlled to be 10-18%; refining the mud through a direct-push type pug refiner to obtain mud strips; (4) placing the mud strips into a die with an inner support body, and performing extrusion molding to obtain a ceramic roller blank tube with the inner support body; (5) drying the ceramic roller blank tube provided with the inner support; maintaining the pressure of the dried ceramic roller blank tube provided with the inner support for 30min under the pressure of 100Mpa, and carrying out cold isostatic pressing process treatment; (6) and transferring the ceramic roller bar blank pipe which is subjected to the cold isostatic pressing treatment and provided with the inner support into a high-temperature nitrogen furnace, preserving the heat for 35min at the temperature of 1100 ℃ under the protection of flowing nitrogen, then heating to 1700 ℃, preserving the heat for 2h, sintering, and obtaining the wear-resistant ceramic roller after reaction and cooling.
Furthermore, the fire-resistant temperature of the wear-resistant ceramic roller product is above 1800 ℃, and the Mohs hardness can reach 8.2. And putting the obtained wear-resistant ceramic roller product in ice-water mixed liquid, taking out after 10 minutes, and putting the wear-resistant ceramic roller product in hot water at the temperature of 80-100 ℃, wherein the wear-resistant ceramic roller product is intact and has no fracture.
Example 2:
a wear-resistant ceramic roller comprises a ceramic roller body 1 and a support body, wherein the support body comprises an outer transverse reinforcing rib 3, an inner support ring 4 and a connecting column 5; the ceramic roller body 1 is of a hollow structure, the inner support ring 4 is arranged inside the ceramic roller body 1, a strip-shaped notch 2 is formed in the outer surface wall of the ceramic roller body 1 along the length direction, a connecting column 5 is welded on the outer surface wall of the inner support ring 4, the connecting column 5 penetrates through the ceramic roller body 1 and extends to the inside of the strip-shaped notch 2, an outer transverse reinforcing rib 3 is bonded inside the strip-shaped notch 2, and the outer transverse reinforcing rib 3 is welded and fixed with the connecting column 5; the number of the outer transverse reinforcing ribs 3 is three, the three outer transverse reinforcing ribs 3 are respectively annular, the distance between every two adjacent outer transverse reinforcing ribs 3 is equal, the outer transverse reinforcing ribs 3 are rectangular, and the thickness of each outer transverse reinforcing rib 3 is smaller than the depth of each strip-shaped notch 2; the ceramic roller body 1 is prepared from the following wear-resistant ceramic powder raw materials in parts by weight:
90 parts of silicon micropowder
17 portions of barium carbonate
12 portions of titanium diboride
10 portions of aluminum nitride
12 parts of boron nitride
3 portions of zirconium oxide
9 parts of silicon nitride
10 portions of talcum powder
3 parts of ceramic powder
6 parts of silicon carbide
5 parts of a binding agent.
Further, the silicon micropowder is sub-nanometer spherical silicon micropowder.
Further, the bonding agent consists of the following components in parts by weight: 10 parts of ethyl acetate, 4 parts of water-based resin polyacrylamide and 6 parts of polyethylene glycol.
Further, the ceramic powder is powder of muscovite, magnesium aluminate spinel and calcite.
Further, the mass ratio of the muscovite powder to the magnesium aluminate spinel powder to the calcite powder is 6:3: 2.
Further, the preparation method of the silicon micropowder comprises the following steps: (a) silicon powder grinding: high-purity silicon powder is selected to be immersed into grinding fluid, the silicon powder is ground on a grinding disc for 3 hours to obtain fine silicon powder, and the fine silicon powder is thoroughly cleaned to remove the grinding fluid; (b) screening: screening fine silicon powder by adopting a multi-stage sieve tray, and then selecting 200-mesh and 300-mesh fine silicon powder to be placed into a plasma reaction furnace; (c) pre-reaction: vacuumizing the plasma reaction furnace to 1-3 Pa, then electrifying and heating to 450 ℃, and keeping for 16 min; (d) reaction: introducing inert protective gas into the plasma reaction furnace, heating to 1450 ℃, and rapidly introducing oxygen after the fine silicon powder is molten and kept for 12 min; (e) and (3) cooling: the melted fine silicon powder after being charged with oxygen is quickly changed into silicon dioxide dust, and is taken into a quencher by an induced draft device for cooling to form spherical particles, and then the silicon powder is obtained by cloth bag, cyclone or electrostatic dust collection.
Further, the inert protective gas is argon.
Further, the temperature rise process of the plasma reaction furnace in the step (d) is as follows: heating at a rate of 15-20 deg.C/min, 7.5-12 deg.C/min, and 3-5 deg.C/min.
Further, (1) weighing silicon micropowder, barium carbonate, titanium diboride, aluminum nitride, boron nitride, zirconium oxide, silicon nitride, talcum powder, ceramic powder, silicon carbide, sodium bicarbonate and antimony trioxide according to the weight parts of the formula, adding the materials into a high-pressure homogenizer, uniformly mixing, and fully ball-milling to obtain a mixture; (2) adding a binding agent into the mixture obtained in the step (1) in an inert atmosphere, stirring for 15min, heating to 150 ℃, and reacting for 30min under heat preservation; (3) adding water into the mixture obtained in the step (2), and stirring the mixture in a powerful stirrer to form a pug, wherein the water content of the pug is controlled to be 10-18%; refining the mud through a direct-push type pug refiner to obtain mud strips; (4) placing the mud strips into a die with an inner support body, and performing extrusion molding to obtain a ceramic roller blank tube with the inner support body; (5) drying the ceramic roller blank tube provided with the inner support; maintaining the pressure of the dried ceramic roller blank tube provided with the inner support for 30min under the pressure of 120Mpa, and carrying out cold isostatic pressing process treatment; (6) and transferring the ceramic roller blank pipe which is subjected to the cold isostatic pressing treatment and provided with the inner support into a high-temperature nitrogen furnace, preserving the heat for 35min at 1000 ℃ under the protection of flowing nitrogen, then heating to 1650 ℃, preserving the heat for 2h, sintering, and cooling after reaction to obtain the wear-resistant ceramic roller.
Furthermore, the fire-resistant temperature of the wear-resistant ceramic roller product is above 1800 ℃, and the Mohs hardness can reach 8.0. And putting the obtained wear-resistant ceramic roller product in ice-water mixed liquid, taking out after 10 minutes, and putting the wear-resistant ceramic roller product in hot water at the temperature of 80-100 ℃, wherein the wear-resistant ceramic roller product is intact and has no fracture.
Example 3:
a wear-resistant ceramic roller comprises a ceramic roller body 1 and a support body, wherein the support body comprises an outer transverse reinforcing rib 3, an inner support ring 4 and a connecting column 5; the ceramic roller body 1 is of a hollow structure, the inner support ring 4 is arranged inside the ceramic roller body 1, a strip-shaped notch 2 is formed in the outer surface wall of the ceramic roller body 1 along the length direction, a connecting column 5 is welded on the outer surface wall of the inner support ring 4, the connecting column 5 penetrates through the ceramic roller body 1 and extends to the inside of the strip-shaped notch 2, an outer transverse reinforcing rib 3 is bonded inside the strip-shaped notch 2, and the outer transverse reinforcing rib 3 is welded and fixed with the connecting column 5; the number of the outer transverse reinforcing ribs 3 is three, the three outer transverse reinforcing ribs 3 are respectively annular, the distance between every two adjacent outer transverse reinforcing ribs 3 is equal, the outer transverse reinforcing ribs 3 are rectangular, and the thickness of each outer transverse reinforcing rib 3 is smaller than the depth of each strip-shaped notch 2; the ceramic roller body 1 is prepared from the following wear-resistant ceramic powder raw materials in parts by weight:
110 portions of silicon micropowder
19 parts of barium carbonate
8 portions of titanium diboride
13 parts of aluminum nitride
15 portions of boron nitride
8 portions of zirconium oxide
11 parts of silicon nitride
12 portions of talcum powder
8 portions of ceramic powder
5 parts of silicon carbide
5 portions of sodium bicarbonate
10 parts of a binding agent.
Further, the silicon micropowder is sub-nanometer spherical silicon micropowder.
Further, the bonding agent consists of the following components in parts by weight: 6 parts of ethyl acetate, 4 parts of water-based resin polyacrylamide and 7 parts of polyethylene glycol.
Further, the ceramic powder is powder of muscovite, magnesium aluminate spinel and calcite.
Further, the mass ratio of the muscovite powder to the magnesium aluminate spinel powder to the calcite powder is 6:3: 2.
Further, the preparation method of the silicon micropowder comprises the following steps: (a) silicon powder grinding: high-purity silicon powder is selected to be immersed into grinding fluid, the silicon powder is ground on a grinding disc for 3 hours to obtain fine silicon powder, and the fine silicon powder is thoroughly cleaned to remove the grinding fluid; (b) screening: screening fine silicon powder by adopting a multi-stage sieve tray, and then selecting 200-mesh and 300-mesh fine silicon powder to be placed into a plasma reaction furnace; (c) pre-reaction: vacuumizing the plasma reaction furnace to 1-3 Pa, then electrifying and heating to 500 ℃, and keeping for 12 min; (d) reaction: introducing inert protective gas into the plasma reaction furnace, heating to 1480 ℃, and rapidly introducing oxygen after the fine silicon powder is melted and kept for 10 min; (e) and (3) cooling: the melted fine silicon powder after being charged with oxygen is quickly changed into silicon dioxide dust, and is taken into a quencher by an induced draft device for cooling to form spherical particles, and then the silicon powder is obtained by cloth bag, cyclone or electrostatic dust collection.
Further, the inert protective gas is argon.
Further, the temperature rise process of the plasma reaction furnace in the step (d) is as follows: heating at a rate of 15-20 deg.C/min, 7.5-12 deg.C/min, and 3-5 deg.C/min.
Further, (1) weighing silicon micropowder, barium carbonate, titanium diboride, aluminum nitride, boron nitride, zirconium oxide, silicon nitride, talcum powder, ceramic powder, silicon carbide, sodium bicarbonate and antimony trioxide according to the weight parts of the formula, adding the materials into a high-pressure homogenizer, uniformly mixing, and fully ball-milling to obtain a mixture; (2) adding a binding agent into the mixture obtained in the step (1) in an inert atmosphere, stirring for 20min, heating to 150 ℃, and reacting for 30min under heat preservation; (3) adding water into the mixture obtained in the step (2), and stirring the mixture in a powerful stirrer to form a pug, wherein the water content of the pug is controlled to be 10-18%; refining the mud through a direct-push type pug refiner to obtain mud strips; (4) placing the mud strips into a die with an inner support body, and performing extrusion molding to obtain a ceramic roller blank tube with the inner support body; (5) drying the ceramic roller blank tube provided with the inner support; maintaining the pressure of the dried ceramic roller blank tube provided with the inner support for 30min under the pressure of 150Mpa, and carrying out cold isostatic pressing process treatment; (6) and transferring the ceramic roller blank pipe which is subjected to the cold isostatic pressing treatment and provided with the inner support into a high-temperature nitrogen furnace, preserving heat at 1200 ℃ for 35min under the protection of flowing nitrogen, then heating to 1500 ℃, preserving heat for 2.5h, sintering, and cooling after reaction to obtain the wear-resistant ceramic roller.
Furthermore, the fire-resistant temperature of the wear-resistant ceramic roller product is above 1800 ℃, and the Mohs hardness can reach 8.1. And putting the obtained wear-resistant ceramic roller product in ice-water mixed liquid, taking out after 10 minutes, and putting the wear-resistant ceramic roller product in hot water at the temperature of 80-100 ℃, wherein the wear-resistant ceramic roller product is intact and has no fracture.
Example 4
A wear-resistant ceramic roller comprises a ceramic roller body 1 and a support body, wherein the support body comprises an outer transverse reinforcing rib 3, an inner support ring 4 and a connecting column 5; the ceramic roller body 1 is of a hollow structure, the inner support ring 4 is arranged inside the ceramic roller body 1, a strip-shaped notch 2 is formed in the outer surface wall of the ceramic roller body 1 along the length direction, a connecting column 5 is welded on the outer surface wall of the inner support ring 4, the connecting column 5 penetrates through the ceramic roller body 1 and extends to the inside of the strip-shaped notch 2, an outer transverse reinforcing rib 3 is bonded inside the strip-shaped notch 2, and the outer transverse reinforcing rib 3 is welded and fixed with the connecting column 5; the number of the outer transverse reinforcing ribs 3 is three, the three outer transverse reinforcing ribs 3 are respectively annular, the distance between every two adjacent outer transverse reinforcing ribs 3 is equal, the outer transverse reinforcing ribs 3 are rectangular, and the thickness of each outer transverse reinforcing rib 3 is smaller than the depth of each strip-shaped notch 2; the ceramic roller body 1 is prepared from the following wear-resistant ceramic powder raw materials in parts by weight:
120 parts of silicon micropowder
20 portions of barium carbonate
11 portions of titanium diboride
15 parts of aluminum nitride
13 parts of boron nitride
5 parts of zirconium oxide
13 parts of silicon nitride
9 portions of talcum powder
5 parts of ceramic powder
8 parts of silicon carbide
7 parts of a binding agent.
Further, the silicon micropowder is sub-nanometer spherical silicon micropowder.
Further, the bonding agent consists of the following components in parts by weight: 9 parts of ethyl acetate, 3 parts of water-based resin polyacrylamide and 8 parts of polyethylene glycol.
Further, the ceramic powder is powder of muscovite, magnesium aluminate spinel and calcite.
Further, the mass ratio of the muscovite powder to the magnesium aluminate spinel powder to the calcite powder is 6:3: 2.
Further, the preparation method of the silicon micropowder comprises the following steps: (a) silicon powder grinding: selecting high-purity silicon powder to be immersed in grinding fluid, grinding the silicon powder on a grinding disc for 3-4 hours to obtain fine silicon powder, and thoroughly cleaning the fine silicon powder to remove the grinding fluid; (b) screening: screening fine silicon powder by adopting a multi-stage sieve tray, and then selecting 200-mesh and 300-mesh fine silicon powder to be placed into a plasma reaction furnace; (c) pre-reaction: vacuumizing the plasma reaction furnace to 1-3 Pa, then electrifying and heating to 480 ℃, and keeping for 14 min; (d) reaction: introducing inert protective gas into the plasma reaction furnace, heating to 1500 ℃, and rapidly introducing oxygen after the fine silicon powder is molten and kept for 8 min; (e) and (3) cooling: the melted fine silicon powder after being charged with oxygen is quickly changed into silicon dioxide dust, and is taken into a quencher by an induced draft device for cooling to form spherical particles, and then the silicon powder is obtained by cloth bag, cyclone or electrostatic dust collection.
Further, the inert protective gas is argon.
Further, the temperature rise process of the plasma reaction furnace in the step (d) is as follows: heating at a rate of 15-20 deg.C/min, 7.5-12 deg.C/min, and 3-5 deg.C/min.
Further, (1) weighing silicon micropowder, barium carbonate, titanium diboride, aluminum nitride, boron nitride, zirconium oxide, silicon nitride, talcum powder, ceramic powder, silicon carbide, sodium bicarbonate and antimony trioxide according to the weight parts of the formula, adding the materials into a high-pressure homogenizer, uniformly mixing, and fully ball-milling to obtain a mixture; (2) adding a binding agent into the mixture obtained in the step (1) in an inert atmosphere, stirring for 18min, heating to 145 ℃, and carrying out heat preservation reaction for 40 min; (3) adding water into the mixture obtained in the step (2), and stirring the mixture in a powerful stirrer to form a pug, wherein the water content of the pug is controlled to be 10-18%; refining the mud through a direct-push type pug refiner to obtain mud strips; (4) placing the mud strips into a die with an inner support body, and performing extrusion molding to obtain a ceramic roller blank tube with the inner support body; (5) drying the ceramic roller blank tube provided with the inner support; maintaining the pressure of the dried ceramic roller blank tube provided with the inner support for 30min under the pressure of 200Mpa, and carrying out cold isostatic pressing process treatment; (6) and transferring the ceramic roller blank pipe which is subjected to the cold isostatic pressing treatment and provided with the inner support into a high-temperature nitrogen furnace, preserving the heat for 30min at the temperature of 1100 ℃ under the protection of flowing nitrogen, then heating to 1650 ℃, preserving the heat for 2.5h, sintering, and reacting and cooling to obtain the wear-resistant ceramic roller.
Furthermore, the fire-resistant temperature of the wear-resistant ceramic roller product is above 1800 ℃, and the Mohs hardness can reach 8.0. And putting the obtained wear-resistant ceramic roller product in ice-water mixed liquid, taking out after 10 minutes, and putting the wear-resistant ceramic roller product in hot water at the temperature of 80-100 ℃, wherein the wear-resistant ceramic roller product is intact and has no fracture.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. A wear-resistant ceramic roller characterized by: the ceramic roller comprises a ceramic roller body and a support body, wherein the support body comprises an outer transverse reinforcing rib, an inner support ring and a connecting column; the ceramic roller body is of an internal hollow structure, the internal support ring is arranged inside the ceramic roller body, a strip-shaped notch is formed in the outer surface wall of the ceramic roller body along the length direction, a connecting column is welded on the outer surface wall of the internal support ring, the connecting column penetrates through the ceramic roller body and extends to the inside of the strip-shaped notch, an external transverse reinforcing rib is bonded inside the strip-shaped notch, and the external transverse reinforcing rib is welded and fixed with the connecting column; the outer transverse reinforcing ribs are arranged in three numbers, the three outer transverse reinforcing ribs are respectively annular, the space between every two adjacent outer transverse reinforcing ribs is equal, the outer transverse reinforcing ribs are rectangular, and the thickness of each outer transverse reinforcing rib is smaller than the depth of each strip-shaped notch; the ceramic roller body is prepared from the following wear-resistant ceramic powder raw materials in parts by weight:
90-120 parts of silicon micropowder
15-20 parts of barium carbonate
7-12 parts of titanium diboride
10-15 parts of aluminum nitride
10-15 parts of boron nitride
3-8 parts of zirconium oxide
9-13 parts of silicon nitride
8-12 parts of talcum powder
3-8 parts of ceramic powder
5-8 parts of silicon carbide
3-5 parts of sodium bicarbonate
2-5 parts of antimony trioxide
5-10 parts of a binding agent.
2. A wear-resistant ceramic roller as set forth in claim 1, wherein: the silicon micropowder is sub-nanometer spherical silicon micropowder.
3. A wear-resistant ceramic roller as set forth in claim 1, wherein: the bonding agent comprises the following components in parts by weight: 6-10 parts of ethyl acetate, 3-5 parts of water-based resin polyacrylamide and 5-8 parts of polyethylene glycol.
4. A wear-resistant ceramic roller as set forth in claim 1, wherein: the ceramic powder is powder of muscovite, magnesium aluminate spinel and calcite.
5. The method of claim 4, wherein the step of forming a wear-resistant ceramic roller comprises: the mass ratio of the muscovite, the magnesium aluminate spinel and the calcite powder in the ceramic powder is 6:3: 2.
6. A wear-resistant ceramic roller as set forth in claim 1, wherein: the preparation method of the silicon micropowder comprises the following steps: (a) silicon powder grinding: selecting high-purity silicon powder to be immersed in grinding fluid, grinding the silicon powder on a grinding disc for 3-4 hours to obtain fine silicon powder, and thoroughly cleaning the fine silicon powder to remove the grinding fluid; (b) screening: screening fine silicon powder by adopting a multi-stage sieve tray, and then selecting 200-mesh and 300-mesh fine silicon powder to be placed into a plasma reaction furnace; (c) pre-reaction: vacuumizing the plasma reaction furnace to 1-3 Pa, then electrifying and heating to 450-500 ℃, and keeping for 12-16 min; (d) reaction: introducing inert protective gas into the plasma reaction furnace, then heating to 1450-1500 ℃, and rapidly introducing oxygen after the fine silicon powder is melted and kept for 8-12 min; (e) and (3) cooling: the melted fine silicon powder after being charged with oxygen is quickly changed into silicon dioxide dust, and is taken into a quencher by an induced draft device for cooling to form spherical particles, and cyclone dust collection is carried out to obtain the silicon powder.
7. The wear-resistant ceramic roller of claim 6, wherein: the inert protective gas in the step (d) is argon.
8. The wear-resistant ceramic roller of claim 6, wherein: the temperature rise process of the plasma reaction furnace in the step (d) is as follows: heating at a rate of 15-20 deg.C/min, 7.5-12 deg.C/min, and 3-5 deg.C/min.
9. The method of manufacturing a wear-resistant ceramic roller according to any one of claims 1 to 8, wherein: the method comprises the following steps: (1) weighing silicon micropowder, barium carbonate, titanium diboride, aluminum nitride, boron nitride, zirconium oxide, silicon nitride, talcum powder, ceramic powder, silicon carbide, sodium bicarbonate and antimony trioxide according to the weight parts of the formula, adding the materials into a high-pressure homogenizer, uniformly mixing, and fully ball-milling to obtain a wear-resistant ceramic powder mixture; (2) adding a binding agent into the wear-resistant ceramic powder mixture obtained in the step (1) in an inert atmosphere, stirring for 15-20min, heating to 140-; (3) adding water into the mixture obtained in the step (2), and stirring the mixture in a powerful stirrer to form a pug, wherein the water content of the pug is controlled to be 10-18%; refining the mud through a direct-push type pug refiner to obtain mud strips; (4) placing the mud strips into a die with an inner support body, and performing extrusion molding to obtain a ceramic roller blank tube with the inner support body; (5) drying the ceramic roller blank tube provided with the inner support; maintaining the pressure of the dried ceramic roller blank tube provided with the inner support for 30min under the pressure of 100-300 Mpa, and carrying out cold isostatic pressing process treatment; (6) and transferring the ceramic roller rod blank pipe which is subjected to the cold isostatic pressing treatment and provided with the inner support into a high-temperature nitrogen furnace, preserving the heat for 25-35min at the temperature of 1000-.
10. A wear-resistant ceramic roller as set forth in claim 9, wherein: the refractory temperature of the wear-resistant ceramic roller product is above 1800 ℃, and the Mohs hardness can reach 8.
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| CN212274607U (en) * | 2020-05-23 | 2021-01-01 | 福建安溪马斯特陶瓷有限公司 | Composite enhanced ceramic roller |
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| US20050229395A1 (en) * | 2004-04-02 | 2005-10-20 | Edgar Proschel | Ceramic rolling body for a rolling bearing, and process for producing it |
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