CN115368137A - Preparation process of copper-carbon-graphite composite material - Google Patents

Preparation process of copper-carbon-graphite composite material Download PDF

Info

Publication number
CN115368137A
CN115368137A CN202110531541.7A CN202110531541A CN115368137A CN 115368137 A CN115368137 A CN 115368137A CN 202110531541 A CN202110531541 A CN 202110531541A CN 115368137 A CN115368137 A CN 115368137A
Authority
CN
China
Prior art keywords
equal
powder
carbon
less
copper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110531541.7A
Other languages
Chinese (zh)
Inventor
姚斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yibin University
Original Assignee
Yibin University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yibin University filed Critical Yibin University
Priority to CN202110531541.7A priority Critical patent/CN115368137A/en
Publication of CN115368137A publication Critical patent/CN115368137A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
    • C04B35/532—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components containing a carbonisable binder
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/522—Graphite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
    • C04B41/515—Other specific metals
    • C04B41/5161—Tin
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/88—Metals
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/616—Liquid infiltration of green bodies or pre-forms
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562—Heating rate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/661—Multi-step sintering
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Abstract

The invention relates to preparation of a metal carbon graphite composite material for electric contact, and particularly provides a method for producing a carbon graphite blank by isostatic pressing and then impregnating a copper alloy to form a copper carbon graphite composite material, which comprises the following steps: s1, raw materials, cooked asphalt coke powder, refined graphite powder, high-wear-resistance carbon black, oxide ceramic powder and the like; s2, kneading the dry powder, and uniformly mixing the raw materials in the S1 according to a certain proportion; s3, bonding asphalt, namely uniformly mixing the raw material mixed in the S2 and the modified molten asphalt according to a certain proportion; s4, rolling sheets, namely pressing the raw materials in the S3 into sheets through a rolling machine; s5, grinding, namely grinding the powder obtained in the step S4 into powder on a grinding machine; s6, molding, namely molding the ground material powder obtained in the step S5 on a hydraulic cold isostatic press; s7, roasting, impregnating asphalt, and roasting again; s8, dipping metal; and S9, subsequent processing and forming. Compared with the prior art, the invention has the advantages of high production efficiency, excellent product performance, no environmental pollution and the like.

Description

Preparation process of copper-carbon-graphite composite material
Technical Field
The invention relates to preparation of a metal carbon graphite composite material for electric contact, and particularly provides a method for producing a carbon graphite blank by isostatic pressing and then impregnating a copper alloy to form a copper carbon graphite composite material.
Background
The copper-graphite composite material combines the excellent conductivity, high strength and high plasticity of metal copper (alloy) and the remarkable heat resistance, corrosion resistance, lubricating property and other properties of graphite, has outstanding comprehensive performance, and is a novel functional material with wide application prospect. The copper-graphite composite material is widely applied to the fields of sliding electric contact materials, wear-resistant materials, electric conduction and heat conduction functional materials in large-scale integrated circuits and high-power microwave devices, and the like, and particularly plays an important role in environments such as electric switch contacts, electric brushes, pantograph slide plates of electric locomotives and the like with harsh working environments.
At present, the preparation processes of the copper-graphite composite material are various, and the preparation methods with practical application values are only a few, such as a powder metallurgy method, an impregnation method and the like. An impregnation process is generally adopted to ensure the conductivity and the self-lubricating property of the copper-graphite composite material, and after the graphite product is impregnated with metal, metal is filled in pores of a carbon matrix to form a metal net-shaped reinforcing framework, so that the effect of improving the strength and the toughness of the carbon matrix is achieved. After the metal is impregnated, the electric conductivity and the heat conductivity are obviously improved, the inherent lubricating property of the carbon matrix can be still maintained, a lubricating film can be formed on the contact surface, and the abrasion of the material is obviously reduced. However, the existing metal-dipping process of carbon graphite blank is complex, the binding force between metal and carbon matrix needs to be improved, and the performance fluctuation of the carbon matrix is large, so that the performance stability of the final product needs to be improved.
Therefore, the applicant provides a preparation process of the copper-carbon graphite composite material, and the prepared copper-carbon graphite composite material can meet various use requirements in terms of various performance indexes, and is convenient to operate, high in production efficiency and environment-friendly.
Disclosure of Invention
Based on the defects of the prior art, the invention provides a preparation process of a copper-carbon graphite composite material.
Specifically, the preparation process of the copper-carbon-graphite composite material provided by the invention comprises the following specific steps:
s1, raw materials, cooked asphalt coke powder, refined graphite powder, high-wear-resistance carbon black, oxide ceramic powder and copper-tin alloy (80-90% of Cu and 10-20% of Sn);
the particle size of the cooked asphalt coke powder is 3-10 mu m, the ash content is less than or equal to 0.8 percent, the sulfur content is less than or equal to 0.3 percent, and the volatile matter is less than or equal to 1.5 percent;
the granularity of the refined graphite powder is-320 meshes: 70-90%, less than or equal to 1.0% of 200 meshes, less than or equal to 0.5% of ash content and less than or equal to 1.0% of volatile component;
the high wear-resistant carbon black has ash content of less than or equal to 0.7 percent, iodine absorption value of 82 +/-7 g/Kg, DBP absorption value (102 +/-7) multiplied by 10 -5 m 3 /kg；
The oxide ceramic powder has the granularity of 5-10 mu m, the effective oxide content is more than or equal to 85 percent, the true density is more than or equal to 2.2g/cm < 3 >, and the water content is less than or equal to 0.5 percent;
the modified asphalt has a softening point of 105-120 ℃, a coking value of more than or equal to 50 percent and an ash content of less than or equal to 0.50 percent;
s2, kneading the dry powder, namely mixing the cooked asphalt coke powder, the refined graphite powder, the high-wear-resistance carbon black and the oxide ceramic powder according to the weight ratio of 79-83:6-10:4-8:3-7 parts by weight of the components are uniformly mixed;
s3, bonding asphalt, namely bonding the mixed raw material in the S2 with the modified molten asphalt in a weight ratio of 10:3-5, mixing and stirring uniformly;
s4, rolling slices, namely pressing the uniformly stirred raw materials in the step S3 into slices by a rolling mill, wherein the thickness of the slices is less than or equal to 0.5mm, and the rolling frequency of the rolls is not less than 2 times;
s5, grinding, namely grinding the powder obtained in the step S4 into powder on a grinding machine, wherein the granularity of the ground powder is more than or equal to 80 percent with the granularity of-320 meshes;
s6, forming, namely forming the ground material powder obtained in the step S5 on a hydraulic cold isostatic press, keeping the forming pressure at more than or equal to 120MPa for more than or equal to 40 minutes, and relieving the pressure to obtain a blank raw material;
s7, roasting, namely putting the blank raw material prepared in the step S6 into a roasting furnace for roasting, wherein the temperature control mode is as follows:
freely raising the temperature at room temperature to 300 ℃ and keeping the temperature for 2 hours;
heating at 300-750 deg.c and 4 deg.c/h for 12 hr;
heating at 750-900 deg.c and 8 deg.c/h for 6 hr;
raising the temperature at 900-1200 ℃ at 12 ℃/h, and keeping for 5 hours;
naturally cooling to obtain a primary baked blank;
impregnating the primary-baked blank with asphalt under the impregnation pressure of 1.6 Mpa, and then carrying out secondary baking, wherein the temperature control mode is as follows:
freely raising the temperature at room temperature to 300 ℃ and keeping the temperature for 2 hours;
heating at 300-750 deg.c and 6 deg.c/h for 9 hr;
heating at 750-900 deg.c and 10 deg.c/h for 6 hr;
heating at 900-1200 deg.C at 13 deg.C/h for 4 hr;
heating at 1200-1800 deg.C at 15 deg.C/h for 4 hr;
naturally cooling to obtain a double-baked carbon-based blank;
s8, dipping metal, preheating the roasted carbon-based blank in an electric furnace at 1200 ℃ for 2 hours, adding copper-tin alloy into an intermediate frequency furnace, heating to 1300 ℃ to completely melt the copper-tin alloy into a melt, pouring the melt into the carbon-based blank, ensuring that the melt overflows the carbon-based blank, heating to 1300-1400 ℃, adopting a mechanical pressurization mode or a vacuum pumping pressurization mode, maintaining the pressure at 10-24Mpa for not less than 2 minutes, pouring out the alloy melt, and naturally cooling to room temperature;
and S9, taking out the blank after the metal immersion, and processing the blank into the required dimensional precision.
The invention has the beneficial effects that: the interface wettability between metal and a carbon graphite matrix can be effectively improved, and the permeability of the product is improved; products with different specifications and sizes can be conveniently prepared; the product has excellent performance, simple and convenient operation, high production efficiency and environmental protection.
Detailed Description
Example one
A preparation process of a carbon-based blank of a copper-carbon-graphite composite material comprises the following specific steps:
s1, raw materials, cooked asphalt coke powder, refined graphite powder, high-wear-resistance carbon black, oxide ceramic powder and the like;
the particle size of the cooked asphalt coke powder is 3-10 mu m, the ash content is less than or equal to 0.8 percent, the sulfur content is less than or equal to 0.3 percent, and the volatile matter is less than or equal to 1.5 percent;
the granularity of the refined graphite powder is-320 meshes: 70-90%, 200 mesh less than or equal to 1.0%, ash less than or equal to 0.5%, and volatile matter less than or equal to 1.0%;
the high wear-resistant carbon black has ash content of less than or equal to 0.7 percent, iodine absorption value of 82 +/-7 g/Kg and DBP absorption value of 102 +/-710 -5 m 3 /kg；
The particle size of the oxide ceramic powder is 5-10 mu m, the content of effective oxides is more than or equal to 85 percent, the true density is more than or equal to 2.2g/cm < 3 >, and the water content is less than or equal to 0.5 percent;
the modified asphalt has a softening point of 105-120 ℃, a coking value of more than or equal to 50 percent and an ash content of less than or equal to 0.50 percent;
s2, kneading the dry powder, namely mixing the cooked asphalt coke powder, the refined graphite powder, the high-wear-resistance carbon black and the oxide ceramic powder according to the weight ratio of 79:8:8:5 parts by weight of the components are uniformly mixed;
s3, bonding asphalt, namely bonding the mixed raw material in the S2 with the modified molten asphalt in a weight ratio of 10:4.2, mixing and stirring uniformly;
s4, rolling slices, namely pressing the uniformly stirred raw materials in the step S3 into slices by a rolling mill, wherein the thickness of the slices is less than or equal to 0.5mm, and the rolling frequency of the rolls is not less than 2 times;
s5, grinding, namely grinding the powder obtained in the step S4 into powder on a grinding machine, wherein the granularity of the ground powder is more than or equal to 80 percent with the granularity of-320 meshes;
s6, forming, namely forming the ground material powder obtained in the step S5 on a hydraulic cold isostatic press, keeping the forming pressure at more than or equal to 120MPa for more than or equal to 40 minutes, and relieving the pressure to obtain a blank raw material;
s7, roasting, namely putting the blank raw material prepared in the step S6 into a roasting furnace for roasting, wherein the temperature control mode is as follows:
freely raising the temperature at room temperature to 300 ℃ and keeping the temperature for 2 hours;
heating at 300-750 deg.c and 4 deg.c/h for 12 hr;
heating at 750-900 deg.c and 8 deg.c/h for 6 hr;
raising the temperature at 900-1200 ℃ at 12 ℃/h, and keeping for 5 hours;
naturally cooling to obtain a primary baked blank;
impregnating the primary-baked blank with asphalt under the impregnation pressure of 1.6 Mpa, and then carrying out secondary baking, wherein the temperature control mode is as follows:
freely raising the temperature at room temperature to 300 ℃ and keeping the temperature for 2 hours;
heating at 300-750 deg.c and 6 deg.c/h for 9 hr;
heating at 750-900 deg.c in 10 deg.c/h for 6 hr;
heating at 900-1200 deg.C at 13 deg.C/h for 4 hr;
heating at 1200-1800 deg.C at 15 deg.C/h for 4 hr;
naturally cooling to obtain a double-baked carbon-based blank;
modified asphalt is used as a binder in the mixing process, and the performance of the carbon product is more excellent at the same roasting temperature. The roasting performance of the process is compared with that of a medium-temperature asphalt control group by adding modified asphalt as a binder.
Figure RE-776274DEST_PATH_IMAGE001
Example two
A preparation process of a copper-carbon-graphite composite material comprises the following specific steps:
s1, raw materials, cooked asphalt coke powder, refined graphite powder, high-wear-resistance carbon black, oxide ceramic powder and copper-tin alloy (Cu 90% and Sn 10%);
the particle size of the cooked asphalt coke powder is 3-10 mu m, the ash content is less than or equal to 0.8 percent, the sulfur content is less than or equal to 0.3 percent, and the volatile matter is less than or equal to 1.5 percent;
the granularity of the refined graphite powder is-320 meshes: 70-90%, 200 mesh less than or equal to 1.0%, ash less than or equal to 0.5%, and volatile matter less than or equal to 1.0%;
the high wear-resistant carbon black has ash content of less than or equal to 0.7 percent, iodine absorption value of 82 +/-7 g/Kg and DBP absorption value of 102 +/-710-5 m < 3 >/Kg;
the oxide ceramic powder has the granularity of 5-10 mu m, the effective oxide content is more than or equal to 85 percent, the true density is more than or equal to 2.2g/cm < 3 >, and the water content is less than or equal to 0.5 percent;
the modified asphalt has a softening point of 105-120 ℃, a coking value of more than or equal to 50 percent and an ash content of less than or equal to 0.50 percent;
s2, kneading the dry powder, namely mixing the cooked asphalt coke powder, the refined graphite powder, the high-wear-resistance carbon black and the oxide ceramic powder according to the weight ratio of 80:8:6:6 parts by weight of the components are uniformly mixed;
s3, bonding the asphalt, namely bonding the mixed raw material in the S2 with the modified molten asphalt in a weight ratio of 10:4, mixing and stirring uniformly;
s4, rolling slices, namely pressing the uniformly stirred raw materials in the step S3 into slices by a rolling mill, wherein the thickness of the slices is less than or equal to 0.5mm, and the rolling frequency of the rolls is not less than 2 times;
s5, grinding, namely grinding the powder obtained in the step S4 into powder on a grinding machine, wherein the granularity of the ground powder is more than or equal to 80 percent with the granularity of-320 meshes;
s6, forming, namely forming the ground material powder of the S5 on a hydraulic cold isostatic press, wherein the forming pressure is more than or equal to 120MPa, the pressure is maintained for more than or equal to 40 minutes, and the pressure is relieved to obtain a blank raw material;
s7, roasting, namely putting the blank raw material prepared in the step S6 into a roasting furnace for roasting, wherein the temperature control mode is as follows:
freely raising the temperature at the room temperature of-300 ℃ and keeping for 2 hours;
heating at 300-750 deg.c and 4 deg.c/h for 12 hr;
heating at 750-900 deg.c and 8 deg.c/h for 6 hr;
raising the temperature at 900-1200 ℃ at 12 ℃/h, and keeping for 5 hours;
naturally cooling to obtain a primary baked blank;
impregnating the primary-baked blank with asphalt under the impregnation pressure of 1.6 Mpa, and then carrying out secondary baking, wherein the temperature control mode is as follows:
freely raising the temperature at room temperature to 300 ℃ and keeping the temperature for 2 hours;
heating at 300-750 deg.c and 6 deg.c/h for 9 hr;
heating at 750-900 deg.c in 10 deg.c/h for 6 hr;
heating at 900-1200 deg.C at 13 deg.C/h for 4 hr;
heating at 1200-1800 deg.C at 15 deg.C/h for 4 hr;
naturally cooling to obtain a double-baked carbon-based blank;
s8, dipping metal, preheating the roasted carbon-based blank in an electric furnace at 1200 ℃ for 2 hours, adding copper-tin alloy into an intermediate frequency furnace, heating to 1300 ℃ to completely melt the copper-tin alloy into a melt, pouring the melt into the carbon-based blank, ensuring that the melt overflows the carbon-based blank, heating to 1300-1400 ℃, adopting a vacuumizing and pressurizing mode, maintaining the pressure at more than 10MPa for not less than 1.5 minutes, pouring out the alloy melt, and naturally cooling to room temperature;
and S9, taking out the blank after the metal immersion, and processing the blank into the required dimensional precision.
By adopting the process, after secondary roasting, the graphitization degree can reach about 48 percent through high-temperature treatment at 1600-1800 ℃, the mechanical strength of the product is greatly improved, the open porosity of the product is more than 12 percent, the porosity is reduced by nearly 50 percent, the impregnation effect is better, and the specific performance parameters are shown in the following table.
Figure RE-80216DEST_PATH_IMAGE002
EXAMPLE III
A preparation process of a copper-carbon graphite composite material comprises the following specific steps:
s1, raw materials, cooked asphalt coke powder, refined graphite powder, high-wear-resistance carbon black, oxide ceramic powder and copper-tin alloy (80-90% of Cu and 10-20% of Sn);
the particle size of the cooked asphalt coke powder is 3-10 mu m, the ash content is less than or equal to 0.8 percent, the sulfur content is less than or equal to 0.3 percent, and the volatile matter is less than or equal to 1.5 percent;
the granularity of the refined graphite powder is-320 meshes: 70-90%, 200 mesh less than or equal to 1.0%, ash less than or equal to 0.5%, and volatile matter less than or equal to 1.0%;
the high wear-resistant carbon black has ash content of less than or equal to 0.7 percent, iodine absorption value of 82 +/-7 g/Kg and DBP absorption value of 102 +/-710-5 m < 3 >/Kg;
the particle size of the oxide ceramic powder is 5-10 mu m, the content of effective oxides is more than or equal to 85 percent, the true density is more than or equal to 2.2g/cm < 3 >, and the water content is less than or equal to 0.5 percent;
the modified asphalt has a softening point of 105-120 ℃, a coking value of more than or equal to 50 percent and an ash content of less than or equal to 0.50 percent;
s2, kneading the dry powder, namely mixing the cooked asphalt coke powder, the refined graphite powder, the high-wear-resistance carbon black and the oxide ceramic powder according to the weight ratio of 82:7:6:5 parts by weight of the components are uniformly mixed;
s3, bonding the asphalt, namely bonding the mixed raw material in the S2 with the modified molten asphalt in a weight ratio of 10:3.9, mixing and stirring uniformly;
s4, rolling slices, namely pressing the uniformly stirred raw materials in the step S3 into slices by a rolling mill, wherein the thickness of the slices is less than or equal to 0.5mm, and the rolling frequency of the rolls is not less than 2 times;
s5, grinding, namely grinding the powder obtained in the step S4 on a grinding machine, wherein the ground powder has the granularity of-320 meshes which is more than or equal to 80%;
s6, forming, namely forming the ground material powder of the S5 on a hydraulic cold isostatic press, wherein the forming pressure is more than or equal to 120MPa, the pressure is maintained for more than or equal to 40 minutes, and the pressure is relieved to obtain a blank raw material;
s7, roasting, namely putting the blank raw material prepared in the step S6 into a roasting furnace for roasting, wherein the temperature control mode is as follows:
freely raising the temperature at room temperature to 300 ℃ and keeping the temperature for 2 hours;
heating at 300-750 deg.c and 4 deg.c/h for 12 hr;
heating at 750-900 deg.c and 8 deg.c/h for 6 hr;
raising the temperature at 900-1200 ℃ at 12 ℃/h, and keeping for 5 hours;
naturally cooling to obtain a primary baking blank material;
impregnating the primary-baked blank with asphalt under the impregnation pressure of 1.6 Mpa, and then carrying out secondary baking, wherein the temperature control mode is as follows:
freely raising the temperature at the room temperature of-300 ℃ and keeping for 2 hours;
heating at 300-750 deg.c and 6 deg.c/h for 9 hr;
heating at 750-900 deg.c and 10 deg.c/h for 6 hr;
heating at 900-1200 deg.C at 13 deg.C/h for 4 hr;
heating at 1200-1800 deg.C at 15 deg.C/h for 4 hr;
naturally cooling to obtain a double-baked carbon-based blank;
s8, dipping metal, preheating the roasted carbon-based blank in an electric furnace at 1200 ℃ for 2 hours, adding copper-tin alloy into an intermediate frequency furnace, heating to 1300 ℃ to completely melt the copper-tin alloy into a melt, pouring the melt into the carbon-based blank, ensuring that the melt overflows the carbon-based blank, heating to 1300-1400 ℃, adopting a mechanical pressurization mode, maintaining the pressure at over 24Mpa for not less than 3 minutes, pouring out the alloy melt, and naturally cooling to room temperature;
and S9, taking out the blank after the metal immersion, and processing the blank into the required dimensional precision.
By adopting the process, a certain gap is reserved when the product is canned, and the distance of 3-5mm is kept. In the tank, the height of the copper alloy melt should be more than 15mm higher than the height of the product. The properties of the carbon graphite blanks impregnated with different Cu-Sn alloys are compared as shown in the following table.
Figure RE-417657DEST_PATH_IMAGE004
The above description is only a preferred embodiment of the present invention, and it should be understood that the above embodiment is illustrative and not to be construed as limiting the present invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims (6)

1. A preparation process of a copper-carbon graphite composite material is characterized by comprising the following steps:
s1, raw materials, cooked asphalt coke powder, refined graphite powder, high-wear-resistance carbon black, oxide ceramic powder and copper-tin alloy;
s2, kneading the dry powder, namely mixing the cooked asphalt coke powder, the refined graphite powder, the high-wear-resistance carbon black and the oxide ceramic powder according to the weight ratio of 79-83:6-10:4-8:3-7 parts by weight of the components are uniformly mixed;
s3, bonding asphalt, namely bonding the raw materials mixed in the S2 with the modified molten asphalt in a weight ratio of 10:3-5, mixing and stirring uniformly;
s4, rolling slices, namely pressing the uniformly stirred raw materials in the step S3 into slices by a rolling mill, wherein the thickness of the slices is less than or equal to 0.5mm, and the rolling frequency of the rolls is not less than 2 times;
s5, grinding, namely grinding the powder obtained in the step S4 on a grinding machine, wherein the ground powder has the granularity of-320 meshes which is more than or equal to 80%;
s6, forming, namely forming the ground material powder of the S5 on a hydraulic cold isostatic press, wherein the forming pressure is more than or equal to 120MPa, the pressure is maintained for more than or equal to 40 minutes, and the pressure is relieved to obtain a blank raw material;
s7, roasting, namely putting the blank raw material prepared in the step S6 into a roasting furnace for roasting, wherein the temperature control mode is as follows:
freely raising the temperature at the room temperature of-300 ℃ and keeping for 2 hours;
heating at 300-750 deg.c and 4 deg.c/h for 12 hr;
heating at 750-900 deg.c and 8 deg.c/h for 6 hr;
raising the temperature at 900-1200 ℃ at 12 ℃/h, and keeping for 5 hours;
naturally cooling to obtain a primary baking blank material;
impregnating the primary baked blank with asphalt under the impregnation pressure of 1.6 Mpa, and then carrying out secondary baking, wherein the temperature control mode is as follows:
freely raising the temperature at the room temperature of-300 ℃ and keeping for 2 hours;
heating at 300-750 deg.c and 6 deg.c/h for 9 hr;
heating at 750-900 deg.c and 10 deg.c/h for 6 hr;
heating at 900-1200 deg.C at 13 deg.C/h for 4 hr;
heating at 1200-1800 deg.C at 15 deg.C/h for 4 hr;
naturally cooling to obtain a double-baked carbon-based blank;
s8, dipping metal, preheating the roasted carbon-based blank in an electric furnace at 1200 ℃ for 2 hours, adding copper-tin alloy into an intermediate frequency furnace, heating to 1300 ℃ to completely melt the copper-tin alloy into a melt, pouring the melt into the carbon-based blank, ensuring that the melt overflows the carbon-based blank, heating to 1300-1400 ℃, adopting a vacuumizing and pressurizing mode, maintaining the pressure at more than 10MPa for not less than 1.5 minutes, pouring out the alloy melt, and naturally cooling to room temperature;
and S9, taking out the blank after the metal immersion, and processing the blank into the required dimensional precision.
2. The process for preparing a copper-carbon-graphite composite material according to claim 1, wherein: the copper-tin alloy comprises the following components in percentage by weight: 80-90% of Cu and 10-20% of Sn;
the particle size of the cooked asphalt coke powder is 3-10 mu m, the ash content is less than or equal to 0.8 percent, the sulfur content is less than or equal to 0.3 percent, and the volatile matter is less than or equal to 1.5 percent;
the granularity of the refined graphite powder is-320 meshes: 70-90%, less than or equal to 1.0% of 200 meshes, less than or equal to 0.5% of ash content and less than or equal to 1.0% of volatile component;
the high wear-resistant carbon black has ash content of less than or equal to 0.7 percent, iodine absorption value of 82 +/-7 g/Kg and DBP absorption value (102 +/-7) multiplied by 10-5m < 3 >/Kg;
the oxide ceramic powder has a particle size of 5-10 μm, an effective oxide content of not less than 85%, and a true density of not less than 2.2g/cm 3 The water content is less than or equal to 0.5 percent;
the modified asphalt has a softening point of 105-120 ℃, a coking value of more than or equal to 50 percent and an ash content of less than or equal to 0.50 percent.
3. The preparation process of the copper-carbon-graphite composite material as claimed in claim 1, wherein modified asphalt is adopted as the binder in S3, so that the performance of the carbon-based blank can be effectively improved.
4. The process according to claim 1, wherein the carbon-based blanks with different dimensions can be obtained according to different dimensions of the isostatic die in S6.
5. The preparation process of the copper-carbon-graphite composite material as claimed in claim 1, wherein the roasting process in S7 adopts high-temperature roasting and pressure impregnation treatment, so that the performance of the carbon-based blank is greatly improved, and the impregnation efficiency is effectively improved.
6. The preparation process of the copper-carbon-graphite composite material as claimed in claim 1, wherein the copper-tin alloy adopted in S8 can effectively avoid environmental pollution caused by heavy metals such as lead and antimony, and greatly improve the environmental friendliness of the product.
CN202110531541.7A 2021-05-17 2021-05-17 Preparation process of copper-carbon-graphite composite material Pending CN115368137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110531541.7A CN115368137A (en) 2021-05-17 2021-05-17 Preparation process of copper-carbon-graphite composite material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110531541.7A CN115368137A (en) 2021-05-17 2021-05-17 Preparation process of copper-carbon-graphite composite material

Publications (1)

Publication Number Publication Date
CN115368137A true CN115368137A (en) 2022-11-22

Family

ID=84059947

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110531541.7A Pending CN115368137A (en) 2021-05-17 2021-05-17 Preparation process of copper-carbon-graphite composite material

Country Status (1)

Country Link
CN (1) CN115368137A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1168438A2 (en) * 2000-06-23 2002-01-02 Sumitomo Electric Industries, Ltd. High thermal conductivity composite material, and method for producing the same
CN102146552A (en) * 2010-02-09 2011-08-10 航天材料及工艺研究所 Copper/graphite compound material and preparation method thereof
CN104774012A (en) * 2015-04-29 2015-07-15 四川理工学院 Electric locomotive pantograph copper-soaking carbon contact strip producing method
CN107857591A (en) * 2017-10-30 2018-03-30 大同新成新材料股份有限公司 A kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder
CN108358638A (en) * 2018-04-02 2018-08-03 大同新成新材料股份有限公司 A kind of metal-impregnated carbon slide preparation process
CN111230126A (en) * 2020-01-14 2020-06-05 大同新成新材料股份有限公司 Preparation method of copper-based inorganic nonmetal β -Sialon ceramic carbon slide bar material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1168438A2 (en) * 2000-06-23 2002-01-02 Sumitomo Electric Industries, Ltd. High thermal conductivity composite material, and method for producing the same
CN102146552A (en) * 2010-02-09 2011-08-10 航天材料及工艺研究所 Copper/graphite compound material and preparation method thereof
CN104774012A (en) * 2015-04-29 2015-07-15 四川理工学院 Electric locomotive pantograph copper-soaking carbon contact strip producing method
CN107857591A (en) * 2017-10-30 2018-03-30 大同新成新材料股份有限公司 A kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder
CN108358638A (en) * 2018-04-02 2018-08-03 大同新成新材料股份有限公司 A kind of metal-impregnated carbon slide preparation process
CN111230126A (en) * 2020-01-14 2020-06-05 大同新成新材料股份有限公司 Preparation method of copper-based inorganic nonmetal β -Sialon ceramic carbon slide bar material

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
厉衡隆等: "《铝冶炼生产技术手册·下册》", 31 July 2011, 冶金工业出版社 *
周序科等: ""氧化物添加剂在碳—石墨制品中的结构转变及其作用"", 《炭素》 *
曹雅秀等: ""浸铜石墨基体孔结构对其密封性的影响"", 《第八届全国新型炭材料学术研讨会论文集》 *

Similar Documents

Publication Publication Date Title
CN101121974B (en) High-strength high-conduction strengthened dispersion copper alloy and preparation method thereof
CN110436950B (en) Preparation method of carbon/carbon composite pantograph sliding plate material with high-component carbon fibers
CN106191497B (en) A kind of preparation method of copper-base pantograph slide plate composite material
CN108384981B (en) A kind of preparation method of copper-based carbon draw runner and its copper-based carbon draw runner material
CN104451224A (en) Preparation method of self-lubricating composite material
CN105018815B (en) A kind of high-Cr, high withstand voltage copper-chromium contact material and preparation method thereof
CN110819842A (en) Preparation method of formed part based on reduced graphene oxide and copper composite material
CN108251672B (en) Method for improving interface bonding strength of copper/graphite composite material
CN107282932B (en) A kind of Al2O3The preparation method of dispersion-strengthened Cu base oil containing bearing
CN105463238A (en) Cu-Cr electrical contact material and preparation method thereof
CN110229989B (en) Multi-element hard alloy and preparation method thereof
CN115108833A (en) Continuous casting graphite material and preparation method thereof
CN108823444B (en) Short-process preparation method of copper-carbon composite material
CN102059339B (en) Method for preparing copper based pantograph pan material
CN112063880B (en) Copper-based powder metallurgy pantograph sliding plate material for monorail car and preparation method thereof
CN115368137A (en) Preparation process of copper-carbon-graphite composite material
CN109593981B (en) Preparation method of silver tin oxide contact material for improving sintering property of ingot blank
CN104550868A (en) Pantograph metal-impregnated carbon slider vacuum pressure infiltration method
CN111014696A (en) TiB2Method for preparing pantograph carbon slide bar material from/Cu composite material
CN112981168B (en) Powder hot-forged copper-based pantograph slide plate material and preparation method thereof
CN113185292A (en) Production method of extrusion-molded copper graphite material
CN108083804B (en) High-conductivity graphite slider and preparation method thereof
CN112760539B (en) Modified titanium aluminum carbide composite material, preparation method and application
CN110791672B (en) Preparation method of cadmium molybdate modified copper-based composite electrical contact material
CN110343888B (en) Preparation method of high-copper-low-tungsten Cu-W composite material

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination