CN113579208A - Preparation method of high-chromium cast iron-based ceramic composite grinding roller - Google Patents
Preparation method of high-chromium cast iron-based ceramic composite grinding roller Download PDFInfo
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Abstract
The invention discloses a preparation method of a high-chromium cast iron-based ceramic composite grinding roller, which comprises the following steps: soaking the ceramic particles in an acid solution, then vibrating, cleaning and drying; coating a layer of ceramic powder on the surface of the ceramic particles, and putting the ceramic particles into an oven for drying; mixing and uniformly stirring the ceramic particles and the binder; mixing the particle mixture with a pore-forming agent, uniformly filling the mixture into a mold, slightly pressing the mixture to form, putting the whole mold into a drying room for drying, and drying and demolding to obtain a ceramic prefabricated member; sequentially fixing the ceramic prefabricated parts on the surface of the grinding roller casting mold sand mold circumferentially by using metal wires and then assembling the mold; smelting metal raw materials to form high-chromium cast iron molten iron, controlling the percentage content components of each element, placing crushed rare earth modifier small particles at the bottom of a casting ladle, pouring the high-chromium cast iron molten iron into the casting ladle, and then pouring the high-chromium cast iron molten iron into a grinding roller casting cavity to obtain the high-chromium cast iron-based ceramic composite grinding roller. The invention has the advantages of improving the hardness and toughness and prolonging the whole service life while realizing double wear resistance.
Description
Technical Field
The invention relates to the technical field of high-performance ceramic grinding rollers, in particular to a preparation method of a high-chromium cast iron-based ceramic composite grinding roller.
Background
In industries such as coal-fired power generation and cement, a grinding roller and a lining plate of a coal mill are widely used in a coal powder production system, and the wear-resisting service life of the grinding roller and the lining plate directly influences the output of powder making, the granularity of coal powder, the loss of the grinding roller and the production cost.
Most of ceramic grinding rollers used in the existing coal-fired power plant are integrally cast by high-hardness and high-wear-resistance high-chromium cast iron materials, the service life can reach more than 20000 hours, but the use effect can be achieved only by imported products, most of domestic high-chromium cast iron-based ceramic composite grinding rollers have the problem of low impact toughness of high-chromium cast iron substrates, and cracks are easy to appear in the use process, so that the whole grinding roller is broken. On the other hand, due to the reason of the preparation process, the volume of the ceramic particles on the surface of the composite grinding roller is too large, the amount of high chromium metal among the particles is small, firm wrapping cannot be formed, the grinding roller is difficult to play the high wear-resisting effect of the ceramic particles because the particles fall off due to the grinding of pulverized coal in the use process.
Disclosure of Invention
The invention aims to provide a preparation method of a high-chromium cast iron-based ceramic composite grinding roller, so that the high-chromium cast iron-based ceramic composite grinding roller with high substrate toughness, good casting infiltration channel and high ceramic particle bonding strength is prepared.
The technical purpose of the invention is realized by the following technical scheme:
the preparation method of the high-chromium cast iron-based ceramic composite grinding roller is characterized by comprising the following steps of:
(1) soaking ceramic particles with the particle size of 10-18 meshes in an acid solution for 8-12 hours, then carrying out vibration cleaning on the ceramic particles after acid cleaning, and drying to obtain ceramic particles with clean surfaces;
(2) coating a layer of ceramic powder on the surface of the ceramic particles pretreated in the step (1), and then putting the ceramic particles into an oven for drying;
(3) mixing the ceramic particles dried in the step (2) with a binder according to a certain proportion and uniformly stirring;
(4) mixing the particle mixture with the surface binder and a pore-forming agent according to a certain volume ratio, uniformly loading the mixture into a mold, slightly pressing the mixture to form, putting the whole mold into a drying room, drying the whole mold at 70-100 ℃ for 48-72 hours, and drying and demolding to obtain a ceramic prefabricated member;
(5) sequentially fixing the ceramic prefabricated parts on the surface of the grinding roller casting mold sand mold circumferentially by using metal wires and then assembling the mold;
(6) smelting metal raw materials to form high-chromium cast iron molten iron, and controlling the percentage content components of each element in the molten iron as follows: 25 to 27 percent of Cr, 2.9 to 3.3 percent of C, 0.8 to 1.2 percent of Si, 1.0 to 1.5 percent of Ni, 0.3 to 0.8 percent of Cu, 1 to 2 percent of Nb, 0.3 to 0.6 percent of V, 0.5 to 1.0 percent of W, 0.8 to 1.2 percent of Mn, less than or equal to 0.04 percent of S, less than or equal to 0.04 percent of P, and the balance of Fe;
(7) and placing crushed rare earth modifier small particles at the bottom of the casting ladle, pouring high-chromium cast iron molten iron into the casting ladle, and then pouring the high-chromium cast iron molten iron into the grinding roller casting mold cavity to obtain the high-chromium cast iron-based ceramic composite grinding roller.
Preferably, the ceramic powder in the step (2) is one of boron carbide or nickel-based boron carbide, the mass of the ceramic powder is 0.5% -1.5% of the mass of the ceramic particles, and the particle size of the ceramic powder is 300-500 meshes.
Preferably, in the step (1), the ceramic particles are corundum zirconia, and the mass content of zirconia in the corundum zirconia particles is 10-40%.
Preferably, the vibration cleaning in the step (1) is ultrasonic cleaning or mechanical vibration cleaning.
Preferably, in the step (3), the binder is one of silica sol or water glass, and the addition amount of the binder is 6-10% of the mass of the ceramic particles.
Preferably, the die material in the step (4) is one or a combination of any several of metal, graphite and foam.
Preferably, the pore-forming agent in the step (4) is one or a combination of any several of EPS foam particles, wood chips or paraffin particles, and the volume ratio of the ceramic particle mixture to the pore-forming agent is 1:1.5-1: 1.
Preferably, the rare earth modifier in the step (7) is one of a heavy rare earth modifier or a light rare earth modifier, and the addition amount of the rare earth modifier is 0.3-0.6% of the mass of the high-chromium cast iron molten iron.
Preferably, the surface of the ceramic preform in the step (4) is cellular and porous.
Preferably, in the step (7), the hardness of the high-chromium matrix in the metal ceramic composite grinding roller is 62-64HRC, and the impact strength is 6-9J/cm2。
In conclusion, the invention has the following beneficial effects:
(1) the rare earth alterant is added into the high-chromium cast iron, so that a high-chromium cast iron matrix can obtain high hardness and higher toughness, the wear-resisting service life of the high-chromium cast iron matrix is more than 2 times that of the common high-chromium cast iron, the cost is only about 1.2 times that of the original high-chromium cast iron, impact and vibration generated in the operation process of the grinding roller can be effectively resisted, and the stable operation of equipment is ensured.
(2) According to the invention, the ceramic powder coated on the surface of the ceramic particle is a transition layer material, and at high temperature, boron carbide on the surface of the ceramic particle can react with molten metal to form a ferroboron phase and can be oxidized to form boron oxide to generate interface reaction with the surface of the ceramic particle, so that the ceramic particle is firmly combined with the high-chromium matrix in the abrasion process of the grinding roller, the particle is not dropped, and the high-wear-resistance effect is exerted.
(3) The pore-forming agent forms a casting infiltration channel at high temperature of the high-chromium cast iron molten iron, and forms firm reaction interface combination with the ceramic particles, so that sufficient high-chromium metal matrix is ensured among the ceramic particles, and the ceramic particles are prevented from falling off in the operation process of the grinding roller.
(4) The working surface of the grinding roller is formed by interlacing a high-chromium cast iron matrix with high wear resistance and a ceramic particle material with high hardness, is honeycomb-shaped, has double wear resistance and has the service life more than 2 times that of the conventional ceramic composite grinding roller.
Detailed Description
The following further describes the embodiments of the present invention, which are not to be construed as limiting the invention.
Example 1
(1) Soaking ceramic particles with the particle size of 10-18 meshes in an acid solution for 8 hours, then cleaning the ceramic particles after acid cleaning by ultrasonic waves, and drying to obtain ceramic particles with clean surfaces, wherein the ceramic particles are zirconia alumina, and the mass content of zirconia in the zirconia alumina particles is 32%.
(2) Coating a layer of ceramic powder on the surface of the ceramic particles pretreated in the step (1), wherein the ceramic powder is boron carbide, the mass of the ceramic powder is 0.5% of the ceramic particles, and the particle size of the ceramic powder is 300-mesh and 500-mesh, and then putting the ceramic particles into an oven for drying.
(3) And (3) mixing the dried ceramic particles in the step (2) with a binder in proportion and uniformly stirring, wherein the binder is silica sol, and the addition amount of the binder is 7% of the mass of the ceramic particles.
(4) Mixing the particle mixture with the binder on the surface with a pore-forming agent according to the volume ratio of 1:1.2, uniformly filling the pore-forming agent into a mold, slightly pressing the mold to form, putting the whole mold into a drying room, drying at 80 ℃ for 52 hours, drying and demolding to obtain the ceramic prefabricated member, wherein the surface of the ceramic prefabricated member is in a honeycomb porous shape.
(5) And sequentially and circumferentially fixing the ceramic prefabricated part on the surface of the grinding roller casting mold sand mold by using metal steel wires and then assembling the mold.
(6) Smelting metal raw materials to form high-chromium cast iron molten iron, and controlling the percentage content components of each element in the molten iron as follows: 26 percent of Cr, 3.1 percent of C, 0.9 percent of Si, 1.2 percent of Ni, 0.6 percent of Cu, 1 percent of Nb, 0.4 percent of V, 0.7 percent of W, 0.9 percent of Mn, less than or equal to 0.04 percent of S, less than or equal to 0.04 percent of P, and the balance of Fe.
(7) And placing crushed small rare earth modifier particles at the bottom of the casting ladle, wherein the rare earth modifier is heavy rare earth modifier, the addition amount of the rare earth modifier is 0.4 percent of the mass of the high-chromium cast iron molten iron, pouring the high-chromium cast iron molten iron into the casting ladle, and then pouring the high-chromium cast iron molten iron into the grinding roller casting mold cavity to obtain the high-chromium cast iron-based ceramic composite grinding roller.
The high-chromium cast iron-based ceramic composite grinding roller prepared by the embodiment has the hardness of 62HRC and the impact strength of 9J/cm2。
Example 2
(1) Soaking ceramic particles with the particle size of 10-18 meshes in an acid solution for 10 hours, then cleaning the ceramic particles after acid cleaning by ultrasonic waves, and drying to obtain ceramic particles with clean surfaces, wherein the ceramic particles are zirconia corundum, and the mass content of zirconia in the zirconia corundum particles is 27%.
(2) Coating a layer of ceramic powder on the surface of the ceramic particles pretreated in the step (1), wherein the ceramic powder is nickel-based boron carbide, the mass of the ceramic powder is 0.7% of the ceramic particles, and the particle size of the ceramic powder is 300-mesh and 500-mesh, and then putting the ceramic particles into an oven for drying.
(3) And (3) mixing the dried ceramic particles in the step (2) with a binder in proportion and uniformly stirring, wherein the binder is silica sol, and the addition amount of the binder is 6% of the mass of the ceramic particles.
(4) Mixing the particle mixture with the surface binder and a pore-forming agent according to a volume ratio of 1:1.1, uniformly filling the mixture into a mold, wherein the pore-forming agent is wood dust, the mold material is one or a combination of any more of metal, graphite and foam, slightly pressing and forming, putting the whole mold into a drying room, drying at 90 ℃ for 60 hours, and drying and demolding to obtain the ceramic prefabricated member, wherein the surface of the ceramic prefabricated member is in a honeycomb porous shape.
(5) And sequentially and circumferentially fixing the ceramic prefabricated part on the surface of the grinding roller casting mold sand mold by using metal iron wires and then assembling the mold.
(6) Smelting metal raw materials to form high-chromium cast iron molten iron, and controlling the percentage content components of each element in the molten iron as follows: 26 percent of Cr, 3.1 percent of C, 1.1 percent of Si, 1.3 percent of Ni, 0.6 percent of Cu, 1.2 percent of Nb, 0.5 percent of V, 0.6 percent of W, 1.1 percent of Mn, less than or equal to 0.04 percent of S, less than or equal to 0.04 percent of P, and the balance of Fe.
(7) And placing crushed small rare earth modifier particles at the bottom of the casting ladle, wherein the rare earth modifier is a light rare earth modifier, the addition amount of the rare earth modifier is 0.5 percent of the mass of the high-chromium cast iron molten iron, pouring the high-chromium cast iron molten iron into the casting ladle, and then pouring the high-chromium cast iron molten iron into the grinding roller casting mold cavity to obtain the high-chromium cast iron-based ceramic composite grinding roller.
The high-chromium cast iron-based ceramic composite grinding roller prepared by the embodiment has the hardness of 63HRC and the impact strength of 8J/cm2。
Example 3
(1) Soaking ceramic particles with the particle size of 10-18 meshes in an acid solution for 12 hours, then cleaning the ceramic particles after acid cleaning by ultrasonic waves, and drying to obtain ceramic particles with clean surfaces, wherein the ceramic particles are zirconia alumina, and the mass content of zirconia in the zirconia alumina particles is 13%.
(2) Coating a layer of ceramic powder on the surface of the ceramic particles pretreated in the step (1), wherein the ceramic powder is boron carbide, the mass of the ceramic powder is 1.2% of the ceramic particles, and the particle size of the ceramic powder is 300-mesh and 500-mesh, and then putting the ceramic particles into an oven for drying.
(3) And (3) mixing the dried ceramic particles in the step (2) with a binder in proportion and uniformly stirring, wherein the binder is silica sol, and the addition amount of the binder is 9% of the mass of the ceramic particles.
(4) Mixing the particle mixture with the binder on the surface and a pore-forming agent according to the volume ratio of 1:1.5, uniformly filling the pore-forming agent which is the combination of EPS foam particles and paraffin particles into a mold, slightly pressing the mold to form, putting the whole mold into a drying room to dry for 48 hours at 100 ℃, and drying and demolding to obtain the ceramic prefabricated member, wherein the surface of the ceramic prefabricated member is in a honeycomb porous shape.
(5) And sequentially and circumferentially fixing the ceramic prefabricated part on the surface of the grinding roller casting mold sand mold by using metal lead wires and then assembling the mold.
(6) Smelting metal raw materials to form high-chromium cast iron molten iron, and controlling the percentage content components of each element in the molten iron as follows: 25 percent of Cr, 2.9 percent of C, 1.2 percent of Si, 1.4 percent of Ni, 0.7 percent of Cu, 1.8 percent of Nb, 0.6 percent of V, 0.9 percent of W, 1.2 percent of Mn, less than or equal to 0.04 percent of S, less than or equal to 0.04 percent of P, and the balance of Fe.
(7) And placing crushed small rare earth modifier particles at the bottom of the casting ladle, wherein the rare earth modifier is heavy rare earth modifier, the addition amount of the rare earth modifier is 0.6 percent of the mass of the high-chromium cast iron molten iron, pouring the high-chromium cast iron molten iron into the casting ladle, and then pouring the high-chromium cast iron molten iron into the grinding roller casting mold cavity to obtain the high-chromium cast iron-based ceramic composite grinding roller.
The high-chromium cast iron-based ceramic composite grinding roller prepared by the embodiment has the hardness of 64HRC and the impact strength of 8J/cm2。
Example 4
(1) Soaking ceramic particles with the particle size of 10-18 meshes in an acid solution for 10 hours, then cleaning the ceramic particles after acid cleaning by ultrasonic waves, and drying to obtain ceramic particles with clean surfaces, wherein the ceramic particles are zirconia alumina, and the mass content of zirconia in the zirconia alumina particles is 40%.
(2) Coating a layer of ceramic powder on the surface of the ceramic particles pretreated in the step (1), wherein the ceramic powder is boron carbide, the mass of the ceramic powder is 0.6% of the ceramic particles, and the particle size of the ceramic powder is 300-mesh and 500-mesh, and then putting the ceramic particles into an oven for drying.
(3) And (3) mixing the dried ceramic particles in the step (2) with a binder in proportion, and uniformly stirring, wherein the binder is water glass, and the addition amount of the binder is 10% of the mass of the ceramic particles.
(4) Mixing the particle mixture with the binder on the surface with a pore-forming agent according to a volume ratio of 1:1, uniformly filling the pore-forming agent which is a combination of EPS foam particles and paraffin particles into a mold, slightly pressing the mold to form, putting the whole mold into a drying room, drying for 72 hours at 75 ℃, drying and demolding to obtain the ceramic prefabricated member, wherein the surface of the ceramic prefabricated member is in a honeycomb porous shape.
(5) And sequentially and circumferentially fixing the ceramic prefabricated part on the surface of the grinding roller casting mold sand mold by using metal iron wires and then assembling the mold.
(6) Smelting metal raw materials to form high-chromium cast iron molten iron, and controlling the percentage content components of each element in the molten iron as follows: 26 percent of Cr, 3.3 percent of C, 1.1 percent of Si, 1.4 percent of Ni, 0.7 percent of Cu, 2 percent of Nb, 0.6 percent of V, 1.0 percent of W, 1.1 percent of Mn, less than or equal to 0.04 percent of S, less than or equal to 0.04 percent of P, and the balance of Fe.
(7) And placing crushed small rare earth modifier particles at the bottom of the casting ladle, wherein the rare earth modifier is light rare earth modifier, the addition amount of the rare earth modifier is 0.3 percent of the mass of the high-chromium cast iron molten iron, pouring the high-chromium cast iron molten iron into the casting ladle, and then pouring the high-chromium cast iron molten iron into the grinding roller casting mold cavity to obtain the high-chromium cast iron-based ceramic composite grinding roller.
The high-chromium cast iron-based ceramic composite grinding roller prepared by the embodiment has the hardness of 62HRC and the impact strength of 7J/cm2。
The high-chromium cast iron of the invention is added with the rare earth alterant, so that the high-chromium cast iron matrix can obtain high hardness and higher toughness, the wear-resisting life of the high-chromium cast iron matrix is more than 2 times of that of the common high-chromium cast iron, the cost is only about 1.2 times of the original cost, the impact and the vibration generated in the operation process of the grinding roller can be effectively resisted, the stable operation of equipment is ensured, the ceramic powder coated on the surface of the ceramic particles is a transition layer material, boron carbide on the surface of the ceramic particles can react with molten metal to form a ferroboron phase at high temperature and can be oxidized to form boron oxide to generate an interface reaction with the surface of the ceramic particles, the ceramic particles are firmly combined with the high-chromium matrix in the wear process of the grinding roller, the particles do not fall off, the high wear-resisting effect is exerted, the pore-forming agent forms a casting-infiltration channel at high temperature of the high-chromium cast iron and firmly reacts with the ceramic particles to form an interface combination, and the sufficient high-chromium metal matrix among the ceramic particles is ensured, the ceramic particles are prevented from falling off in the operation process of the grinding roller, the working surface of the grinding roller is formed by interleaving a high-wear-resistant high-chromium cast iron matrix and a high-hardness ceramic particle material, and the grinding roller is honeycomb-shaped, has double wear-resistant performance and has the service life more than 2 times that of the conventional ceramic composite grinding roller.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (10)
1. The preparation method of the high-chromium cast iron-based ceramic composite grinding roller is characterized by comprising the following steps of:
(1) soaking ceramic particles with the particle size of 10-18 meshes in an acid solution for 8-12 hours, then carrying out vibration cleaning on the ceramic particles after acid cleaning, and drying to obtain ceramic particles with clean surfaces;
(2) coating a layer of ceramic powder on the surface of the ceramic particles pretreated in the step (1), and then putting the ceramic particles into an oven for drying;
(3) mixing the ceramic particles dried in the step (2) with a binder according to a certain proportion and uniformly stirring;
(4) mixing the particle mixture with the surface binder and a pore-forming agent according to a certain volume ratio, uniformly loading the mixture into a mold, slightly pressing the mixture to form, putting the whole mold into a drying room, drying the whole mold at 70-100 ℃ for 48-72 hours, and drying and demolding to obtain a ceramic prefabricated member;
(5) sequentially fixing the ceramic prefabricated parts on the surface of the grinding roller casting mold sand mold circumferentially by using metal wires and then assembling the mold;
(6) smelting metal raw materials to form high-chromium cast iron molten iron, and controlling the percentage content components of each element in the molten iron as follows: 25 to 27 percent of Cr, 2.9 to 3.3 percent of C, 0.8 to 1.2 percent of Si, 1.0 to 1.5 percent of Ni, 0.3 to 0.8 percent of Cu, 1 to 2 percent of Nb, 0.3 to 0.6 percent of V, 0.5 to 1.0 percent of W, 0.8 to 1.2 percent of Mn, less than or equal to 0.04 percent of S, less than or equal to 0.04 percent of P, and the balance of Fe;
(7) and placing crushed rare earth modifier small particles at the bottom of the casting ladle, pouring high-chromium cast iron molten iron into the casting ladle, and then pouring the high-chromium cast iron molten iron into the grinding roller casting mold cavity to obtain the high-chromium cast iron-based ceramic composite grinding roller.
2. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: in the step (2), the ceramic powder is one of boron carbide or nickel-based boron carbide, the mass of the ceramic powder is 0.5-1.5% of that of the ceramic particles, and the particle size of the ceramic powder is 300-500 meshes.
3. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: in the step (1), the ceramic particles are corundum-zirconia, and the mass content of zirconia in the corundum-zirconia particles is 10-40%.
4. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: and (2) the vibration cleaning in the step (1) is ultrasonic cleaning or mechanical vibration cleaning.
5. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: in the step (3), the binder is one of silica sol or water glass, and the addition amount of the binder is 6-10% of the mass of the ceramic particles.
6. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: and (4) the die material in the step (4) is one or the combination of any more of metal, graphite and foam.
7. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: in the step (4), the pore-forming agent is one or a combination of any more of EPS foam particles, wood chips or paraffin particles, and the volume ratio of the ceramic particle mixture to the pore-forming agent is 1:1.5-1: 1.
8. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: in the step (7), the rare earth alterant is one of a heavy rare earth alterant or a light rare earth alterant, and the addition amount of the rare earth alterant is 0.3-0.6% of the weight of the high-chromium cast iron molten iron.
9. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: and (4) the surface of the ceramic prefabricated member in the step (4) is in a honeycomb porous shape.
10. The method for preparing the high-chromium cast iron-based ceramic composite grinding roller according to claim 1, which is characterized in that: in the step (7), the hardness of the high-chromium matrix in the metal ceramic composite grinding roller is 62-64HRC, and the impact strength is 6-9J/cm2。
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114807733A (en) * | 2022-05-11 | 2022-07-29 | 长沙威尔保新材料有限公司 | Method for connecting and fixing high-chromium white wear-resistant cast iron part and metal part |
| CN114874012A (en) * | 2022-05-10 | 2022-08-09 | 航投(厦门)新材料科技有限公司 | High-strength complex-phase ceramic part and preparation method thereof |
| CN115156540A (en) * | 2022-06-12 | 2022-10-11 | 华能国际电力股份有限公司营口电厂 | Preparation method of metal ceramic composite grinding roller |
| CN115178739A (en) * | 2022-06-12 | 2022-10-14 | 华能国际电力股份有限公司营口电厂 | Preparation method of vertical mill metal-based ceramic composite grinding roller |
| CN115821096A (en) * | 2022-11-30 | 2023-03-21 | 山东硕源工业机械设备有限公司 | Preparation method of ceramic high-chromium alloy-based wear-resistant composite material |
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2021
- 2021-08-19 CN CN202110953742.6A patent/CN113579208A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114874012A (en) * | 2022-05-10 | 2022-08-09 | 航投(厦门)新材料科技有限公司 | High-strength complex-phase ceramic part and preparation method thereof |
| CN114807733A (en) * | 2022-05-11 | 2022-07-29 | 长沙威尔保新材料有限公司 | Method for connecting and fixing high-chromium white wear-resistant cast iron part and metal part |
| CN114807733B (en) * | 2022-05-11 | 2023-06-23 | 长沙威尔保新材料有限公司 | Method for connecting and fixing high-chromium white wear-resistant cast iron part and metal part |
| CN115156540A (en) * | 2022-06-12 | 2022-10-11 | 华能国际电力股份有限公司营口电厂 | Preparation method of metal ceramic composite grinding roller |
| CN115178739A (en) * | 2022-06-12 | 2022-10-14 | 华能国际电力股份有限公司营口电厂 | Preparation method of vertical mill metal-based ceramic composite grinding roller |
| CN115821096A (en) * | 2022-11-30 | 2023-03-21 | 山东硕源工业机械设备有限公司 | Preparation method of ceramic high-chromium alloy-based wear-resistant composite material |
| CN115821096B (en) * | 2022-11-30 | 2023-08-18 | 山东硕源工业机械设备有限公司 | Preparation method of ceramic high-chromium alloy-based wear-resistant composite material |
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Application publication date: 20211102 |