CN117402001A - Vacuumizing metal impregnation method - Google Patents
Vacuumizing metal impregnation method Download PDFInfo
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- CN117402001A CN117402001A CN202311307551.8A CN202311307551A CN117402001A CN 117402001 A CN117402001 A CN 117402001A CN 202311307551 A CN202311307551 A CN 202311307551A CN 117402001 A CN117402001 A CN 117402001A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 119
- 239000002184 metal Substances 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005470 impregnation Methods 0.000 title claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 83
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 73
- 239000010439 graphite Substances 0.000 claims abstract description 73
- 239000000047 product Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims abstract description 4
- 239000012467 final product Substances 0.000 claims abstract description 4
- 238000007654 immersion Methods 0.000 claims abstract description 4
- 230000003647 oxidation Effects 0.000 claims abstract description 4
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 claims abstract description 4
- 238000007598 dipping method Methods 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 22
- 230000008018 melting Effects 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 15
- 238000009792 diffusion process Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 6
- 229910000897 Babbitt (metal) Inorganic materials 0.000 claims description 5
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 4
- 229910001245 Sb alloy Inorganic materials 0.000 claims description 4
- 239000002140 antimony alloy Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000007770 graphite material Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
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- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- 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
- C04B41/5127—Cu, e.g. Cu-CuO eutectic
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- 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
- C04B41/5144—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal with a composition mainly composed of one or more of the metals of the iron group
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- 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
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- 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
- C04B41/5155—Aluminium
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- 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
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- 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
- C04B41/5166—Lead
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- 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
- C04B41/5172—Cadmium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The invention relates to the technical field of metal impregnation, in particular to a vacuum-pumping metal impregnation method, which comprises the following steps: s1, placing metal into a graphite crucible, closing a molten metal inflow pipe and a molten metal return pipe, and turning on a power supply of a heating element to melt the metal; s2, placing the graphite product to be impregnated into a graphite frame; then hanging the graphite frame on a placing table, sealing the tank body, vacuumizing, and heating by adopting infrared radiation; s3, opening a molten metal inflow pipe, and simultaneously introducing N into the molten metal surface through a pressurizing system 2 Pressurizing gas; s4, after the immersion, closing the molten metal inflow pipe, recovering to the atmospheric pressure, opening the molten metal inflow pipe, and allowing the molten metal to flow back to the graphite crucible; s5, closing a molten metal inflow pipe, selecting a proper cooling curve according to the condition of the performance index requirement of the final product, taking out the frame after cooling, taking out the impregnated graphite product, and putting the impregnated graphite product into a filler to prevent oxidation; the present invention is preferably capable of metal impregnation.
Description
Technical Field
The invention relates to the technical field of metal impregnation, in particular to a vacuum-pumping metal impregnation method.
Background
The graphite product impregnated with metal has the advantages of graphite self-lubricity, low friction coefficient, abrasion resistance, high strength of metal material, excellent heat conductivity and the like. With the development of modern industrial technology, the requirements on carbon graphite materials are gradually increased, and the types of carbon graphite products used are gradually diversified from pure carbon to impregnating resin, and then the alloy is impregnated into the pure carbon material (vapor deposition). In particular, impregnated metallic graphite develops particularly rapidly, since it inherits the advantages of graphite materials themselves, such as: high temperature resistance, abrasion resistance, low friction coefficient, small thermal expansion coefficient and the like, and has the advantages of metal materials, such as high strength, good processability, excellent thermal conductivity and the like, so that the brittleness of graphite is greatly improved, the mechanical strength of products is improved, and a wider prospect is provided for the application of graphite materials. Therefore, the carbon graphite material impregnated metal has wide application prospect.
The traditional process for preparing the impregnated metal graphite is characterized in that the used metal material is melted by utilizing high temperature, and the graphite sealing material is simultaneously placed in a pressure container to be rapidly subjected to pressure treatment.
When the traditional process is adopted for dipping operation, the treatment time is limited due to the change of the ambient temperature in four seasons, the dipping effect is judged by relying on the experience of operators, and the product quality has larger fluctuation. Meanwhile, operators are affected by high temperature and metal steam, the working environment is poor, the labor intensity is high, the specification and the size of the produced product are limited, and the requirements of large-scale and high-efficiency mechanical equipment cannot be met.
Disclosure of Invention
The invention provides a vacuum-pumping metal impregnation method which can perform metal impregnation preferably.
According to the vacuum metal impregnation method, a vacuum metal impregnation device is adopted, the vacuum metal impregnation device comprises a tank body, the tank body is divided into an impregnation heating working area and a metal melting area through a partition plate, a graphite crucible is arranged in the metal melting area and is used for containing molten metal, a plurality of heating elements are arranged on the graphite crucible, and an insulating layer is arranged on the outer side of the graphite crucible; the outer wall of the metal melting zone is connected with a pressurizing system and a first bleeding valve;
the dipping heating working area is provided with a placing table, the placing table is positioned above the partition plate, a graphite frame is arranged on the placing table, a plurality of through holes are formed in the graphite frame, and the graphite frame is used for placing a graphite product to be dipped; the outer wall of the immersion heating working area is connected with a vacuumizing device and a second diffusing valve;
a molten metal inflow pipe and a molten metal return pipe are arranged below the partition plate, and the bottom end of the molten metal inflow pipe is positioned at the bottom of the graphite crucible;
and comprises the following steps:
s1, placing metal into a graphite crucible, closing a molten metal inflow pipe and a molten metal return pipe, and turning on a power supply of a heating element to melt the metal;
s2, placing the graphite product to be impregnated into a graphite frame with through holes; then hanging the graphite frame on a placing table, sealing the tank body, vacuumizing through a vacuumizing device, and heating by adopting infrared radiation;
s3, when the metal melting temperature is 100-200 ℃ higher than the melting point, opening a metal liquid inflow pipe, and simultaneously introducing N into the metal liquid surface through a pressurizing system 2 Pressurizing gas; the molten metal enters the dipping heating working area from the molten metal inflow pipe due to the pressure difference, so that the graphite product is dipped;
s4, after soaking, closing the metal liquid inflow pipe, respectively opening the first diffusion valve and the second diffusion valve, closing the first diffusion valve and the second diffusion valve when the atmospheric pressure is restored, and opening the metal liquid inflow pipe to enable the metal liquid to flow back to the graphite crucible;
s5, closing a molten metal inflow pipe, selecting a proper cooling curve according to the condition of the performance index requirement of the final product, taking out the frame after cooling, taking out the impregnated graphite product, and putting the impregnated graphite product into a filler to prevent oxidation;
s6, selecting a region where the preheating temperature of the carbon base material and the metal melting temperature reach the process requirements at the same time according to the production plan, and repeating the processes to carry out the next batch of dipping operation.
Preferably, in the step S2, the vacuum degree of the dipping heating working area is controlled to be 50-100mmHg in the vacuumizing process.
Preferably, in the step S3, the pressure is 5-6MPa in the pressurizing process, and the pressure is maintained for 50-60 seconds.
Preferably, the impregnable metal is one of Babbitt metal, aluminum alloy, antimony alloy, iron alloy, and copper alloy.
Preferably, the top of the tank body is provided with an upper cover, and the upper cover can be fixed on the tank body through screws.
Preferably, the upper cover is provided with a pressure gauge.
Preferably, the pressurization system comprises a conduit for introducing N and an air compressor 2 The valve is arranged on the air pipe.
Preferably, a graphite cover is arranged on the top of the graphite frame.
Preferably, the vacuum pumping means comprises a mechanical pump, a molecular pump and an on-off valve.
Preferably, a cooling water jacket is arranged on the outer wall of the tank body, and water can be introduced into the cooling water jacket to cool the tank body.
Through integration, the invention creatively completes metal melting, carbon base material preheating, metal impregnation and subsequent cooling in the same closed space. And (3) immersing molten metal into the carbon graphite open pores to form a network structure by using a vacuumizing method at high temperature and high pressure, so as to realize the metal impregnation purpose. The invention can accurately control the environment temperature and pressure in the dipping process, and realizes complete controllability of the dipping process through the control system, and stable product quality. The invention can realize automatic operation in the production process, is not influenced by the operation and experience of workers, and has stable product quality. The use of the invention can greatly improve the working environment of workers.
Drawings
Fig. 1 is a schematic structural diagram of a vacuum-pumping metal impregnation device in an embodiment.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples. It is to be understood that the examples are illustrative of the present invention and are not intended to be limiting.
Examples
The embodiment provides a vacuum-pumping metal impregnation method, which adopts a vacuum-pumping metal impregnation device, as shown in fig. 1, the vacuum-pumping metal impregnation device comprises a tank body 1, wherein the tank body 1 is divided into an impregnation heating working area and a metal melting area by a partition plate 2, a graphite crucible 3 is arranged in the metal melting area, the graphite crucible 3 is used for containing molten metal 4, a plurality of heating elements 5 are arranged on the graphite crucible 3, and an insulating layer 6 is arranged on the outer side of the graphite crucible 3; the outer wall of the metal melting zone is connected with a pressurizing system 7 and a first bleeding valve 8;
the dipping heating working area is provided with a placing table 9, the placing table 9 is positioned above the partition plate 2, a graphite frame 10 is arranged on the placing table 9, a plurality of through holes 11 are formed in the graphite frame 10, and the graphite frame 10 is used for placing a graphite product 12 to be dipped; the outer wall of the immersion heating working area is connected with a vacuumizing device 13 and a second relief valve 14;
a molten metal inflow pipe 15 and a molten metal return pipe 16 are arranged below the partition plate 2, and the bottom end of the molten metal inflow pipe 15 is positioned at the bottom of the graphite crucible 3.
The vacuumized metal dipping method comprises the following steps:
s1, placing metal (alloy) into a graphite crucible 3, closing a molten metal inflow pipe 15 and a molten metal return pipe 16, and turning on a power supply of a heating element 5 to melt the metal;
s2, placing the graphite product 12 to be impregnated into a graphite frame 10 with a through hole 11 (the wall thickness of the graphite frame 10 is 25mm, and the diameter of the through hole 11 is 12 mm); then hanging the graphite frame 10 on the placing table 9, sealing the tank body 1 (by screwing up a screw), vacuumizing through a vacuumizing device 13, and heating by adopting infrared radiation; controlling the vacuum degree of the dipping heating working area to be 50-100mmHg column;
s3, when the metal melting temperature is higher than the melting point 100-200 ℃, opening the metal liquid inflow pipe 15, and simultaneously introducing N into the metal liquid surface through the pressurizing system 7 2 Pressurizing with air at 5-6MPa for 50-60 s; the molten metal 4 enters the impregnation heating working area from the molten metal inflow pipe 15 due to the pressure difference, so as to impregnate the graphite product 12;
s4, after soaking, closing the metal liquid inflow pipe 15, respectively opening the first diffusion valve 8 and the second diffusion valve 14, closing the first diffusion valve 8 and the second diffusion valve 14 when the atmospheric pressure is restored, and opening the metal liquid inflow pipe 15 to enable the metal liquid 4 to flow back to the graphite crucible 3.
S5, closing a molten metal inflow pipe 15, selecting a proper cooling curve according to the performance index requirement condition of the final product, taking out the frame after cooling, taking out the impregnated graphite product 12, and putting the impregnated graphite product into a filler to prevent oxidation;
s6, selecting a region where the preheating temperature of the carbon base material and the metal melting temperature reach the process requirements at the same time according to the production plan, and repeating the processes to carry out the next batch of dipping operation.
The impregnable metals include, but are not limited to, babbitt metal, aluminum alloy, antimony alloy, iron alloy, copper alloy.
The top of the tank body 1 is provided with an upper cover 17, and the upper cover 17 can be fixed on the tank body 1 through screws.
The upper cover 17 is provided with a pressure gauge 18.
The pressurization system 7 comprises a conduit for introducing N and an air compressor 2 The valve is arranged on the air pipe.
A graphite cover 19 is arranged on the top of the graphite frame 10.
The vacuum pumping device 13 includes a mechanical pump 131, a molecular pump 132, and an on-off valve.
The outer wall of the tank body 1 is provided with a cooling water jacket 20, and the cooling water jacket 20 can be used for cooling the tank body 1 by introducing water.
Control valves are provided on the molten metal inflow pipe 15 and the molten metal return pipe 16, respectively.
The preheating, melting and dipping of the product in the dipping operation process are all completed in the same closed dipping device. The device can accurately control the environment temperature and pressure conditions in the impregnation process, realizes complete controllability of the impregnation process through a control system, and has stable product quality. The device can realize automatic operation in the production process, is not influenced by the operation and experience of workers, and has stable product quality. The use of the device can greatly improve the working environment of workers.
In addition, by designing a proper tank structure, products with large specification and size can be immersed. Aiming at the production characteristics of metal-impregnated carbon graphite products, the heat in the cooling process of the impregnated sample is effectively utilized by reasonably designing the layout distribution of a metal impregnation area and a metal melting area, so that the effects of energy conservation and emission reduction are achieved. The production purposes of one-time charging and multi-batch dipping can be realized by precisely controlling the temperature of different areas of metal dipping, and continuous dipping operation of different alloys can be realized by a production plan and advanced charging, so that the individual production purpose is realized, and the production efficiency is greatly improved. The device has rich metal types, such as Babbitt metal, antimony alloy, copper alloy, and the like.
Other description:
1) The tank body 1 is made of high-quality steel (or boiler steel), the wall thickness is 40mm, the thickness of the tank cover is about 112-120mm, and the lining is made of heat-insulating cotton and refractory bricks.
2) 2/3 of the tank body 1 is arranged underground, and a sealing ring is arranged on the upper cover 17 and is a 2-3mm copper pad.
3) The heating element 5 of the metal melting zone adopts silicon carbide or silicon molybdenum rod, and the dipping heating working zone adopts infrared auxiliary heating.
4) Stainless steel crucibles may be used for impregnating the babbitt metal.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.
Claims (10)
1. A vacuum-pumping metal impregnation method is characterized in that: the vacuum-pumping metal dipping device comprises a tank body (1), wherein the tank body (1) is divided into a dipping heating working area and a metal melting area through a partition plate (2), a graphite crucible (3) is arranged in the metal melting area, the graphite crucible (3) is used for containing molten metal (4), a plurality of heating elements (5) are arranged on the graphite crucible (3), and an insulating layer (6) is arranged on the outer side of the graphite crucible (3); the outer wall of the metal melting zone is connected with a pressurizing system (7) and a first bleeding valve (8);
the dipping heating working area is provided with a placing table (9), the placing table (9) is positioned above the partition plate (2), a graphite frame (10) is arranged on the placing table (9), a plurality of through holes (11) are formed in the graphite frame (10), and the graphite frame (10) is used for placing a graphite product (12) to be dipped; the outer wall of the immersion heating working area is connected with a vacuumizing device (13) and a second relief valve (14);
a molten metal inflow pipe (15) and a molten metal return pipe (16) are arranged below the partition plate (2), and the bottom end of the molten metal inflow pipe (15) is positioned at the bottom of the graphite crucible (3);
and comprises the following steps:
s1, placing metal into a graphite crucible (3), closing a molten metal inflow pipe (15) and a molten metal return pipe (16), and turning on a power supply of a heating element (5) to melt the metal;
s2, placing a graphite product (12) to be impregnated into a graphite frame (10) with a through hole (11); then hanging the graphite frame (10) on a placing table (9), sealing the tank body (1), vacuumizing through a vacuumizing device (13), and heating by adopting infrared radiation;
s3, when the metal melting temperature is 100-200 ℃ higher than the melting point, opening a metal liquid inflow pipe (15), and simultaneously introducing N into the metal liquid surface through a pressurizing system (7) 2 Pressurizing gas; the molten metal (4) enters the dipping heating working area from the molten metal inflow pipe (15) due to the pressure difference, so as to dip the graphite product (12);
s4, after soaking, closing a metal liquid inflow pipe (15), respectively opening a first diffusion valve (8) and a second diffusion valve (14), closing the first diffusion valve (8) and the second diffusion valve (14) when the atmospheric pressure is restored, and opening the metal liquid inflow pipe (15) to enable the metal liquid (4) to flow back to the graphite crucible (3);
s5, closing a molten metal inflow pipe (15), selecting a proper cooling curve according to the performance index requirement condition of a final product, taking out a frame after cooling, taking out the impregnated graphite product (12), and putting the impregnated graphite product into a filler to prevent oxidation;
s6, selecting a region where the preheating temperature of the carbon base material and the metal melting temperature reach the process requirements at the same time according to the production plan, and repeating the processes to carry out the next batch of dipping operation.
2. A method of vacuum metal impregnation according to claim 1, characterized in that: and S2, controlling the vacuum degree of the dipping heating working area to be 50-100mmHg in the vacuumizing process.
3. A method of vacuum metal impregnation according to claim 1, characterized in that: in the S3, the pressure is 5-6MPa and the pressure is maintained for 50-60 seconds in the pressurizing process.
4. A method of vacuum metal impregnation according to claim 1, characterized in that: the impregnable metal is one of Babbitt metal, aluminum alloy, antimony alloy, iron alloy, and copper alloy.
5. A method of vacuum metal impregnation according to claim 1, characterized in that: an upper cover (17) is arranged at the top of the tank body (1), and the upper cover (17) can be fixed on the tank body (1) through screws.
6. The method for vacuum metal impregnation according to claim 5, wherein: the upper cover (17) is provided with a pressure gauge (18).
7. A method of vacuum metal impregnation according to claim 1, characterized in that: the pressurizing system (7) comprises a pipeline and an air compressor, wherein the pipeline is used for introducing N 2 The valve is arranged on the air pipe.
8. A method of vacuum metal impregnation according to claim 1, characterized in that: a graphite cover (19) is arranged at the top of the graphite frame (10).
9. A method of vacuum metal impregnation according to claim 1, characterized in that: the vacuum pumping device (13) comprises a mechanical pump (131), a molecular pump (132) and a switch valve.
10. A method of vacuum metal impregnation according to claim 1, characterized in that: a cooling water jacket (20) is arranged on the outer wall of the tank body (1), and the cooling water jacket (20) can be filled with water to cool the tank body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311307551.8A CN117402001A (en) | 2023-10-10 | 2023-10-10 | Vacuumizing metal impregnation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311307551.8A CN117402001A (en) | 2023-10-10 | 2023-10-10 | Vacuumizing metal impregnation method |
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| CN117402001A true CN117402001A (en) | 2024-01-16 |
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| CN202311307551.8A Pending CN117402001A (en) | 2023-10-10 | 2023-10-10 | Vacuumizing metal impregnation method |
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