CN115594525B - Wear-resistant plate of centrifugal machine and preparation process thereof - Google Patents
Wear-resistant plate of centrifugal machine and preparation process thereof Download PDFInfo
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- CN115594525B CN115594525B CN202211307069.XA CN202211307069A CN115594525B CN 115594525 B CN115594525 B CN 115594525B CN 202211307069 A CN202211307069 A CN 202211307069A CN 115594525 B CN115594525 B CN 115594525B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000011812 mixed powder Substances 0.000 claims description 35
- 239000011863 silicon-based powder Substances 0.000 claims description 30
- 239000000843 powder Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 23
- 238000000498 ball milling Methods 0.000 claims description 21
- 238000005475 siliconizing Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 230000007306 turnover Effects 0.000 claims 2
- 239000002245 particle Substances 0.000 claims 1
- 239000000956 alloy Substances 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 8
- 239000004917 carbon fiber Substances 0.000 description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 6
- 229910010271 silicon carbide Inorganic materials 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000626 liquid-phase infiltration Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
-
- 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
-
- 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
- C04B41/5093—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 with elements other than metals or carbon
- C04B41/5096—Silicon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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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)
- Crushing And Grinding (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention belongs to the technical field of wear-resistant materials, in particular to a centrifuge wear-resistant sheet and a preparation process thereof, wherein the composite material wear-resistant sheet prepared by the special preparation process has the characteristics of high toughness, high hardness and low friction coefficient, and can greatly improve the wear resistance of a helical blade, thereby prolonging the service life of the helical blade; meanwhile, the overhaul and maintenance frequency is reduced, and the working efficiency is improved well; the density of the wear-resistant plate made of the composite material is far lower than that of the hard alloy wear-resistant plate, so that the weight of the wear-resistant plate is greatly reduced, and the energy consumption is reduced.
Description
Technical Field
The invention relates to the technical field of wear-resistant materials, in particular to a centrifuge wear-resistant sheet and a preparation process thereof.
Background
The blade of screw conveyer, especially the cone end part, is easily worn and corroded by the material when the horizontal screw centrifuge processes the material, and when the blade is seriously damaged, the gap between the blade and the rotary drum is enlarged, thereby influencing the extrusion of the material, leading to higher water content of the discharged dry slag and influencing the discharging efficiency and quality of the dry slag. At present, the hard alloy wear-resistant plate is mainly welded at the easily worn part of the spiral blade in the industry, so that the abrasion of the spiral blade is reduced. However, the hard alloy still has quicker wear in the practical application process, heavier weight and larger energy consumption.
Disclosure of Invention
In order to solve the problems in the prior art, the main purpose of the invention is to provide a centrifuge wear-resistant sheet and a preparation process thereof, wherein the wear-resistant sheet is made of a composite material, has better wear resistance, is light in weight, and can reduce energy consumption of a centrifuge.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
a preparation process of a wear-resistant piece of a centrifugal machine comprises the following steps:
s1, preparing Si-MoS 2 Mixed powder
Si powder with the weight ratio of 1 (0.01-0.03) andMoS 2 mixing the powder to obtain mixed powder;
s2, siliconizing treatment
Placing Si-MoS in a crucible 2 And (3) mixing powder, placing a C/C composite material with an opening ratio of 26-34% and a carbon content of 45-60wt% on the mixed powder, and then placing the crucible into a siliconizing furnace for treatment to obtain the wear-resisting sheet.
As a preferable scheme of the preparation process of the centrifuge wear-resistant sheet, the invention comprises the following steps: the step S1 specifically includes:
s11, adding 40-50 wt% of Si powder, and then adding MoS with the dosage 2 Powder, adding the rest Si powder, and mixing the powder for 1-3 hours by using a ball mill without adding balls after all the Si powder is added, so as to ensure that the powder of each element is uniformly mixed;
s12, using a ball mill to make Si-MoS 2 Ball milling the mixed powder according to the ball material ratio of (6-9): 1 for 6-8 hours, taking out, sieving, drying and preserving.
As a preferable scheme of the preparation process of the centrifuge wear-resistant sheet, the invention comprises the following steps: in the step S12, the ball milling media are YG8, and the ball milling media comprise three media of phi 4mm, phi 7mm and phi 12mm, and the weight ratio of the three media is 1:1:2.
As a preferable scheme of the preparation process of the centrifuge wear-resistant sheet, the invention comprises the following steps: in the step S11, the horizontal rotation speed of the ball milling is 400-500r/min, and the overturning rotation speed is 0.5-1.0r/min.
As a preferable scheme of the preparation process of the centrifuge wear-resistant sheet, the invention comprises the following steps: in the step S12, the horizontal rotation speed of the ball milling is 300-500r/min, and the overturning rotation speed is 0.5-1.0r/min.
As a preferable scheme of the preparation process of the centrifuge wear-resistant sheet, the invention comprises the following steps: in the step S1, the granularity of the Si powder is 200 meshes, and the purity is more than 99.99 percent; the MoS 2 The granularity of the powder is 3000 meshes, and the purity is more than 99.99 percent.
As a preferable scheme of the preparation process of the centrifuge wear-resistant sheet, the invention comprises the following steps: in the step S2, the crucible is put into a siliconizing furnace for treatment, and the treatment process comprises the following steps: vacuumizing to below 200pa, heating for 120-150min, heating to 1600+ -30deg.C, and performing melt permeation for 15-30min.
As a preferable scheme of the preparation process of the centrifuge wear-resistant sheet, the invention comprises the following steps: in the step S2, the Si-MoS 2 The amount of the mixed powder used is 2-3 times the weight of the wear pad to be produced.
In order to solve the above technical problems, according to another aspect of the present invention, the following technical solutions are provided:
the wear-resistant piece of the centrifugal machine is prepared by adopting the preparation process.
As a preferable scheme of the wear-resistant sheet for the centrifugal machine, the invention comprises the following steps: the wear rate of the wear-resistant sheet is less than or equal to 0.0025mm/km.
The beneficial effects of the invention are as follows:
the invention provides a centrifuge wear-resistant plate and a preparation process thereof, wherein the composite material wear-resistant plate prepared by the special preparation process has the characteristics of high toughness, high hardness and low friction coefficient, and can greatly improve the wear resistance of a spiral blade, thereby prolonging the service life of the spiral blade; meanwhile, the overhaul and maintenance frequency is reduced, and the working efficiency is improved well; the density of the wear-resistant plate made of the composite material is far lower than that of the hard alloy wear-resistant plate, so that the weight of the wear-resistant plate is greatly reduced, and the energy consumption is reduced.
Detailed Description
The following description will be made clearly and fully with reference to the technical solutions in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a centrifuge wear-resistant plate and a preparation process thereof, wherein the wear-resistant plate made of a composite material prepared by a special preparation process has the characteristics of high toughness, high hardness and low friction coefficient, and is made of a carbon fiber reinforced silicon carbide-based composite material, wherein carbon fibers in the wear-resistant plate are distributed in three space directions of XYZ, and silicon carbide and MoS are filled in the middle of the carbon fibers 2 Matrix bodyThe carbon fiber well provides the strength required by wear-resistant sheets, silicon carbide and MoS 2 The matrix provides the hardness required by the wear-resistant sheet, and the wear-resistant sheet has high strength and high hardness due to the combination of the matrix and the matrix, has very low density, and can greatly improve the wear resistance of the spiral blade, so that the service life of the spiral blade is prolonged; meanwhile, the overhaul and maintenance frequency is reduced, and the working efficiency is improved well; the density of the wear-resistant plate made of the composite material is far lower than that of the hard alloy wear-resistant plate, so that the weight of the wear-resistant plate is greatly reduced, and the energy consumption is reduced.
According to one aspect of the invention, the invention provides the following technical scheme:
a preparation process of a wear-resistant piece of a centrifugal machine comprises the following steps:
s1, preparing Si-MoS 2 Mixed powder
Si powder and MoS with the weight ratio of 1 (0.01-0.03) 2 Mixing the powder to obtain mixed powder; mixing may employ a batch mixer, such as a V-shaped batch mixer; the granularity of the Si powder is 200 meshes, and the purity is more than 99.99 percent; the MoS 2 The granularity of the powder is 3000 meshes, and the purity is more than 99.99 percent; during mixing, si powder in 40-50 wt% is first added and MoS is then added 2 Adding the rest Si powder, and mixing the rest Si powder with a ball mill for 1-3h without adding balls, wherein the horizontal rotation speed of the ball mill is 400-500r/min, and the overturning rotation speed is 0.5-1.0r/min, so that the powder of each element is uniformly mixed; the mixing mode enables MoS 2 The powder is placed in Si powder to prevent MoS 2 Powder is stuck on the wall of the mixing cylinder, so that uneven mixing is caused; si-MoS was carried out by ball mill 2 Ball milling the mixed powder according to the ball material ratio of (6-9) 1 for 6-8h, taking out, sieving, drying and preserving; the ball milling medium is YG8, and comprises three mediums of phi 4mm, phi 7mm and phi 12mm, wherein the weight ratio of the three mediums is 1:1:2, the horizontal rotation speed of ball milling is 300-500r/min, and the overturning rotation speed is 0.5-1.0r/min; the screen is a 100 mesh screen.
Specifically, the Si powder and MoS 2 The weight ratio of the powders may be, for example, but not limited to, any one or between any two of 1:0.01, 1:0.015, 1:0.02, 1:0.025, 1:0.03; the ball to material ratio may be, for example, but not limited to, any one or any of 6:1, 7:1, 8:1, 9:1Meaning the range between the two.
S2, siliconizing treatment
Placing Si-MoS in a crucible 2 Mixing powder, wherein the crucible can be a graphite crucible; placing a C/C composite material with an aperture ratio of 26-34% and a carbon content of 45-60wt% on the mixed powder, and then placing the crucible into a siliconizing furnace for treatment to obtain wear-resisting sheets; the crucible is put into a siliconizing furnace for treatment, and the treatment process comprises the following steps: vacuumizing to below 200pa, heating for 120-150min, heating to 1600+ -30deg.C, and performing melt permeation for 15-30min; the Si-MoS 2 The amount of the mixed powder used is 2-3 times the weight of the wear pad to be produced.
In particular, the open cell content of the C/C composite may be, for example, but not limited to, a range between any one or any two of 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%; the carbon content of the C/C composite may be, for example, but not limited to, any one or between any two of 45wt%, 50wt%, 55wt%, 60 wt%; the temperature rise time may be, for example, but not limited to, any one of 120min, 130min, 140min, 150min, or a range between any two; the incubation time may be, for example, but not limited to, any one of 15min, 20min, 25min, 30min, or a range between any two; the Si-MoS 2 The amount of the mixed powder to be used may be, for example, but not limited to, any one or between any two of 2 times, 2.1 times, 2.2 times, 2.3 times, 2.4 times, 2.5 times, 2.6 times, 2.7 times, 2.8 times, 2.9 times, 3 times the weight of the wear pad to be produced.
The invention also provides a wear-resistant piece of the centrifugal machine, which is prepared by adopting the preparation process; the wear rate of the wear-resistant sheet is less than or equal to 0.0025mm/km.
The technical scheme of the invention is further described below by combining specific embodiments.
Example 1
A preparation process of a wear-resistant piece of a centrifugal machine comprises the following steps:
s1, preparing Si-MoS 2 Mixed powder
Si powder and MoS with the weight ratio of 1:0.01 are mixed 2 Placing the powder into a V-shaped batch mixer for mixing to obtain mixed powder; during mixing, si powder in 40wt% is first added and MoS is then added 2 Adding the rest Si powder, and mixing the rest Si powder for 2 hours by using a ball mill without adding balls, wherein the horizontal rotation speed of the ball mill is 400r/min, and the overturning rotation speed is 0.5r/min, so that the powder of each element is uniformly mixed; si-MoS was carried out by ball mill 2 Ball milling the mixed powder for 6 hours according to a ball material ratio of 6:1, taking out, sieving, drying and preserving; the ball milling medium is YG8, and comprises three mediums of phi 4mm, phi 7mm and phi 12mm, wherein the weight ratio of the three mediums is 1:1:2, the horizontal rotation speed of ball milling is 400r/min, and the overturning rotation speed is 0.5r/min; taking a 100-mesh screen;
s2, siliconizing treatment
Placing Si-MoS in a crucible 2 Mixed powder of Si-MoS 2 The amount of the mixed powder is 2 times of the weight of the wear-resistant sheet to be prepared; placing a C/C composite material with the aperture ratio of 26% and the carbon content of 45wt% on the mixed powder, then placing the crucible in a siliconizing furnace, vacuumizing to be lower than 200pa, heating for 120min, heating to 1580 ℃ for melt infiltration, and maintaining for 15min, thus obtaining the wear-resisting sheet A.
Example 2
A preparation process of a wear-resistant piece of a centrifugal machine comprises the following steps:
s1, preparing Si-MoS 2 Mixed powder
Si powder and MoS with the weight ratio of 1:0.02 are mixed 2 Placing the powder into a V-shaped batch mixer for mixing to obtain mixed powder; during mixing, 45wt% of Si powder is added, and MoS is added 2 Adding the rest Si powder, and mixing the rest Si powder for 2 hours by using a ball mill without adding balls, wherein the horizontal rotation speed of the ball mill is 450r/min, and the overturning rotation speed is 0.75r/min, so that the powder of each element is uniformly mixed; si-MoS was carried out by ball mill 2 Ball milling the mixed powder for 7 hours according to a ball material ratio of 6:1, taking out, sieving, drying and preserving; the ball milling medium is YG8, and comprises three mediums of phi 4mm, phi 7mm and phi 12mm, wherein the weight ratio of the three mediums is 1:1:2, the horizontal rotation speed of ball milling is 400r/min, and the overturning rotation speed is 0.5r/min; taking a 100-mesh screen;
s2, siliconizing treatment
Placing Si-MoS in a crucible 2 Mixed powder of Si-MoS 2 The amount of the mixed powder used is 2.5 times the weight of the wear-resistant sheet to be prepared; placing the C/C composite material with the aperture ratio of 29% and the carbon content of 52wt% on the mixed powder, then placing the crucible in a siliconizing furnace, vacuumizing to be lower than 200pa, heating for 135min, heating to 1610 ℃ for melt infiltration, and keeping the temperature for 22min, thus obtaining the wear-resisting sheet B.
Example 3
A preparation process of a wear-resistant piece of a centrifugal machine comprises the following steps:
s1, preparing Si-MoS 2 Mixed powder
Si powder and MoS with the weight ratio of 1:0.03 are mixed 2 Placing the powder into a V-shaped batch mixer for mixing to obtain mixed powder; during mixing, 50wt% of Si powder is added, and MoS is added 2 Adding the rest Si powder, and mixing the rest Si powder for 2 hours by using a ball mill without adding balls, wherein the horizontal rotation speed of the ball mill is 500r/min, and the overturning rotation speed is 1.0r/min, so that the powder of each element is uniformly mixed; si-MoS was carried out by ball mill 2 Ball milling the mixed powder for 8 hours according to a ball material ratio of 6:1, taking out, sieving, drying and preserving; the ball milling medium is YG8, and comprises three mediums of phi 4mm, phi 7mm and phi 12mm, wherein the weight ratio of the three mediums is 1:1:2, the horizontal rotation speed of ball milling is 400r/min, and the overturning rotation speed is 0.5r/min; taking a 100-mesh screen;
s2, siliconizing treatment
Placing Si-MoS in a crucible 2 Mixed powder of Si-MoS 2 The amount of the mixed powder is 2 times of the weight of the wear-resistant sheet to be prepared; placing a C/C composite material with the aperture ratio of 34% and the carbon content of 60wt% on the mixed powder, then placing the crucible in a siliconizing furnace, vacuumizing to be lower than 200pa, heating for 150min, heating to 1630 ℃ for melt infiltration, and maintaining for 30min, thus obtaining the wear-resisting sheet C.
Comparative example 1
Unlike example 1, moS was not added to the mixed powder 2 Powder, preparing wear-resistant sheet D.
Comparative example 2
Is not identical to example 1The same is that Si powder and MoS are mixed in the powder 2 The specific weight ratio of the powder is 1:1, and the wear-resistant sheet E is prepared.
Wear pads of each of the examples and comparative examples were tested and the results are shown in the following table:
| sample of | Wear rate |
| Wear-resisting sheet A | 0.0014mm/km |
| Wear-resisting plate B | 0.0021mm/km |
| Wear-resisting sheet C | 0.0017mm/km |
| Wear-resisting sheet D | 0.027mm/km |
| Wear-resistant sheet E | 0.15mm/km |
Therefore, the wear-resistant sheet made of the composite material prepared by the special preparation process has the characteristics of high toughness, high hardness and low friction coefficient, and the wear rate of the wear-resistant sheet is less than or equal to 0.0025mm/km; the wear-resistant sheet is made of carbon fiber reinforced silicon carbide based composite material, wherein carbon fibers in the wear-resistant sheet are distributed in three space directions of XYZ, and silicon carbide and MoS are filled in the middle of the carbon fibers 2 The matrix, the carbon fiber well provides the strength required by the wear-resistant sheet, the silicon carbide and the MoS 2 The base body provides wear-resistant sheetsThe required hardness is combined, so that the wear-resistant piece has high strength and high hardness, has very low density, and can greatly improve the wear resistance of the helical blade, thereby prolonging the service life of the helical blade; meanwhile, the overhaul and maintenance frequency is reduced, and the working efficiency is improved well; the density of the wear-resistant plate made of the composite material is far lower than that of the hard alloy wear-resistant plate, so that the weight of the wear-resistant plate is greatly reduced, and the energy consumption is reduced.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the content of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (9)
1. A preparation process of a wear-resistant piece of a centrifugal machine is characterized in that the wear rate of the wear-resistant piece is less than or equal to 0.0025mm/km, and the preparation process comprises the following steps:
s1, preparing Si-MoS 2 Mixed powder
Si powder and MoS with the weight ratio of 1 (0.01-0.03) 2 Mixing the powder to obtain mixed powder;
s2, siliconizing treatment
Placing Si-MoS in a crucible 2 And (3) mixing powder, placing a C/C composite material with an opening ratio of 26-34% and a carbon content of 45-60wt% on the mixed powder, and then placing the crucible into a siliconizing furnace for treatment to obtain the wear-resisting sheet.
2. The preparation process according to claim 1, wherein the step S1 specifically comprises:
s11, adding 40-50 wt% of Si powder, and then adding MoS with the dosage 2 Powder, adding the rest Si powder, and mixing the powder for 1-3 hours by using a ball mill without adding balls after all the Si powder is added, so as to ensure that the powder of each element is uniformly mixed;
s12, using a ball mill to make Si-MoS 2 Ball milling the mixed powder according to the ball material ratio of (6-9): 1 for 6-8 hours, taking out, sieving, drying and preserving.
3. The preparation process according to claim 2, wherein in the step S12, the ball milling media is YG8, and includes three media of Φ4mm, Φ7mm, Φ1mm, and the weight ratio thereof is 1:1:2.
4. The preparation process according to claim 2, wherein in the step S11, the horizontal rotation speed of ball milling is 400-500r/min, and the turnover rotation speed is 0.5-1.0r/min.
5. The preparation process according to claim 2, wherein in the step S12, the horizontal rotation speed of ball milling is 300-500r/min, and the turnover rotation speed is 0.5-1.0r/min.
6. The process according to claim 1, wherein in step S1, the Si powder has a particle size of 200 mesh and a purity of > 99.99%; the MoS 2 The granularity of the powder is 3000 meshes, and the purity is more than 99.99 percent.
7. The preparation process according to claim 1, wherein in the step S2, the crucible is placed in a siliconizing furnace for treatment, and the treatment process comprises: vacuumizing to below 200pa, heating for 120-150min, heating to 1600+ -30deg.C, and performing melt permeation for 15-30min.
8. The process according to claim 1, wherein in the step S2, the Si-MoS 2 The amount of the mixed powder used is 2-3 times the weight of the wear pad to be produced.
9. A centrifuge wear pad prepared by the process of any one of claims 1-8.
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