CN114075681A - Method for treating surface of disc for disc type separator - Google Patents

Method for treating surface of disc for disc type separator Download PDF

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Publication number
CN114075681A
CN114075681A CN202010799521.3A CN202010799521A CN114075681A CN 114075681 A CN114075681 A CN 114075681A CN 202010799521 A CN202010799521 A CN 202010799521A CN 114075681 A CN114075681 A CN 114075681A
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disc
shot blasting
electroplating
treatment
plating
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Inventor
杨山岗
李邦
赵奇峰
刘广明
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CSSC Nanjing Luzhou Machine Co Ltd
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CSSC Nanjing Luzhou Machine Co Ltd
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Priority to CN202010799521.3A priority Critical patent/CN114075681A/en
Publication of CN114075681A publication Critical patent/CN114075681A/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
    • C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C25D5/52—After-treatment of electroplated surfaces by brightening or burnishing
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

The invention discloses a method for treating the surface of a disc for a disc separator, which comprises the following steps: s1: shot blasting: performing shot blasting treatment on the disc, wherein the pressure of a shot blasting machine is 0.3-0.8 MPa, the shot blasting distance is 200-400 mm, the shot blasting angle is 50-85 degrees, and the shot blasting treatment is performed until the shot blasting coverage rate of the disc is completely covered; s2: electroplating pretreatment: polishing the disk subjected to shot blasting until the surface of the disk is smooth and burr-free; s3: plating hard chromium on the surface of the disc, wherein the microhardness value HV of the treated disc is more than or equal to 750; s4: the disc is finely polished, the surface roughness Ra of the polished disc is less than or equal to 0.3, the fatigue strength and the stress corrosion resistance of the disc can be improved by shot blasting, the electroplating is more uniform by the polishing after the shot blasting, the hardness of a coating and the surface roughness of the polished disc after the coating are required, the wear resistance and the corrosion resistance of the disc can be improved, the requirement on the surface roughness can avoid the slag accumulation on the surface of the disc to block a separation space, the coating of the disc can be dechromized and re-coated when the coating of the disc is seriously worn, and the service life of the disc is prolonged.

Description

Method for treating surface of disc for disc type separator
Technical Field
The invention relates to the technical field of auxiliary agent separation, in particular to a method for treating the surface of a disc for a disc type separator.
Background
The disc type centrifuge is one of the sedimentation centrifuge, used for separating materials which are difficult to separate, and is a vertical centrifuge, and a rotary drum is arranged at the upper end of a vertical shaft and is driven by a motor through a transmission device to rotate at high speed. The drum is provided with a group of disk-shaped parts, namely disks, which are mutually sleeved together. A small gap is left between the disks. The rotary drum mainly comprises a rotary drum body, a rotary drum cover, a piston, a distributor, discs and the like (as shown in figure 2), wherein in the material separation process, materials enter the rotary drum through a feeding pipe and enter one disc through the distributor, a plurality of discs are axially arranged at intervals in sequence, and a separation space is formed between every two adjacent discs. As shown in fig. 3, a is the outer surface of the disc, B is the inner surface of the disc, the movement track of the particles gradually slides from the point a at the bottom end of the upper surface of the disc to the point B '-B at the top end of the upper surface of the disc to the point B' -B at the bottom end of the inner surface of the disc (as shown in fig. 4). Therefore, there is a need for a method for treating the surface of a disc for a disc separator to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for treating the surface of a disc for a disc separator, which aims to solve the problems in the prior art.
In order to achieve the above object, the present invention provides a method for treating the surface of a disc for a disc separator, comprising the steps of:
s1: shot blasting: performing shot blasting treatment on the disc, wherein the pressure of a shot blasting machine is 0.3-0.8 MPa, the shot blasting distance is 200-400 mm, the shot blasting angle is 50-85 degrees, and the shot blasting treatment is performed until the shot blasting coverage rate of the disc is completely covered;
s2: electroplating pretreatment: polishing the disk subjected to shot blasting until the surface of the disk is flat and free of burrs;
s3: electroplating: plating hard chromium on the surface of the disc, wherein the microhardness value HV of the treated disc is more than or equal to 750;
s4: and (3) electroplating post-treatment: the disc is finely polished, the surface roughness Ra of the polished disc is less than or equal to 0.3,
in step S1, the shot blasting is to spray high-speed shot flow onto the surface of the part to plastically deform the surface of the part to form a strengthening layer with a certain thickness, and a high residual stress is formed in the strengthening layer, so that a part of stress can be counteracted when the part bears a load due to the existence of the compressive stress on the surface of the part, and the shot blasting can minimize the fatigue strength influence of the disc, improve the reliability and durability of the disc, and improve the adhesion and corrosion resistance of the cover layer, thereby preparing for the following electroplating process; in step S2, polishing the disc can smooth the surface of the disc, which is more favorable for improving the flatness of the plating layer; in step S3, the microhardness value of the processed disc is more than or equal to 750, so that the disc has longer service life; in step S4, the surface roughness Ra of the disc after finish polishing is less than or equal to 0.3, which enables the flow of the separated particles to be smoother and reduces the probability of the corrosion of the slag deposit on the surface of the disc.
As a further improvement of the technical scheme, in the step S1, the shot blasting pressure of the shot blasting machine is 0.5-0.6 MPa, the shot blasting distance is 250-350 mm, the shot blasting angle is 60-75 degrees, the disk of the disk type separator is thin, and the disk can be prevented from deforming by selecting proper pressure.
As a further improvement of the technical scheme, the shot blasting grain diameter of the shot blasting machine is 0.5-1.5 mm.
As a further improvement of the above technical solution, in step S3, the hard chromium plating is performed by using a chromium plating solution, the plating temperature is 55 to 58 ℃, the temperature is relatively constant, and the plating layer can be more uniform.
As a further improvement of the above technical solution, in step S3, the thickness of the hard chromium plating layer is selected from 50 to 240 μm, and the thickness of the plating layer can be adjusted according to actual use scenarios.
As a further improvement of the above technical solution, in the step S4, the finish polishing is mechanical polishing, and the load is controlled at 100-200g/cm2And the control of the load in the mechanical polishing can avoid the cracking of the coating.
As a further improvement of the above technical solution, in step S4, the finish polishing is sprayed with a liquid coolant to reduce the temperature, so as to provide a further guarantee for preventing the coating from cracking.
As a further improvement of the above technical solution, a method for treating the surface of a disc for a disc separator includes the steps of:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 of the treated disc, and the thickness of the hard chrome plating layer is 120 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished with a load of 100g/cm2And water is used as a liquid coolant for spray cooling, and the surface roughness Ra =0.1 of the polished disk.
As a further improvement of the above technical solution, a method for treating the surface of a disc for a disc separator includes the steps of:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 of the treated disc, and the thickness of the hard chrome plating layer is 120 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished with a load of 100g/cm2And water is used as a liquid coolant for spray cooling, and the surface roughness Ra =0.2 of the polished disc.
As a further improvement of the above technical solution, a method for treating the surface of a disc for a disc separator comprises the steps of:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 of the treated disc, and the thickness of the hard chrome plating layer is 120 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished with a load of 100g/cm2And water is used as a liquid coolant for spray cooling, and the surface roughness Ra =0.3 of the polished disk.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention carries out shot blasting treatment on the disc type separator disc, the shot blasting treatment can reduce the fatigue strength influence of the disc to the minimum, simultaneously improves the adhesive force and the corrosion resistance of the covering layer, and improves the reliability and the durability of the disc;
2. the requirement on the micro-hardness of the chromium plating of the disc is more than or equal to 750, and the coating thickness is 120 microns, so that the abrasion resistance and the corrosion resistance of the disc can be improved;
3. after electroplating, the coating is subjected to fine polishing, the load force is controlled, the surface roughness of the coating can be controlled to be less than or equal to 0.3, the separated particles can flow more smoothly, and the probability of slag deposition corrosion is reduced.
4. After the disc is used for a period of time, if the surface coating of the disc is seriously worn, the disc can be dechromized and coated again, so that the disc is prevented from being directly damaged or scrapped, and the cost is reduced to a certain extent.
Description of the drawings:
FIG. 1 is a flow chart of a method for treating the surface of a disc for a disc separator;
FIG. 2 is a sectional view of a disk separator in which a surface treatment method for a disk is applied to the disk separator;
FIG. 3 is a sectional view of a disc structure in a method for surface treatment of a disc for a disc separator;
FIG. 4 is a cross-sectional view showing a particle movement locus of a method for surface treatment of a disc for a disc separator.
Description of the drawings: 1. a rotary drum cover 2, a rotary drum body 3, a distributor 4, a disc 5, a piston 6 and a feeding pipe.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
When the disc of the disc type separator is not processed, the service life of the disc is as follows: 1500 hours.
Example 1: as shown in fig. 1, a method for treating the surface of a disc for a disc separator includes the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chromium on the surface of the disc, adopting a chromium plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 is selected for the treated disc, and the thickness of a hard chromium plating layer is 110 μm;
s4: and (3) electroplating post-treatment: the disc is finely polished, and the load is controlled to be 100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness Ra = 0.3.
The results of example 1 show that the service life of the disc separator is as follows: 2800 hours.
Example 2: a method for processing the surface of a disc for a disc separator comprises the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 is adopted for the treated disc, and the thickness of the hard chrome plating layer is 120 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished, and the load is controlled to be 100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness Ra = 0.3.
Example 2 the results show that the disc life of the disc separator is: 7200 hours.
Example 3: a method for processing the surface of a disc for a disc separator comprises the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chromium on the surface of the disc, adopting a chromium plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 is selected for the treated disc, and the thickness of a hard chromium plating layer is 130 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished, and the load is controlled to be 100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness Ra = 0.3.
Example 3 the results show that the disc life of the disc separator is: 5800 hours.
Comparing the results of examples 1, 2 and 3, the following data are obtained:
surface roughness Coating thickness (μm) Coating Hardness (HV) Service life (hours)
0.3 110 750 2800
0.3 120 750 7200
0.3 130 750 5800
Examples 1, 2, 3 give the preferred results: when the surface roughness Ra =0.3, the thickness is 120 μm, and the hardness HV =750 of the disc coating, the disc has the longest service life.
Example 4: a method for processing the surface of a disc for a disc separator comprises the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =730 is adopted for the treated disc, and the thickness of the hard chrome plating layer is 120 μm;
s4: and (3) electroplating post-treatment: the disc is finely polished, and the load is controlled to be 100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness Ra = 0.3.
The results of example 4 show that the service life of the disc separator is as follows: 7000 hours.
Example 5: a method for processing the surface of a disc for a disc separator comprises the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =770 is selected for the treated disc, and the thickness of the hard chrome plating layer is 120 μm;
s4: and (3) electroplating post-treatment: performing fine polishing on the disc, and selecting load control100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness Ra = 0.3.
Example 5 the results show that the disc life of the disc separator is: and 6000 hours.
Comparing the results of examples 4 and 5, the following data are obtained:
surface roughness Coating thickness (μm) Coating Hardness (HV) Service life (hours)
0.3 120 730 7000
0.3 120 750 7200
0.3 120 770 6000
The preferred results obtained in examples 4 and 5 are: when the surface roughness Ra =0.3, the thickness is 120 μm, and the hardness HV =730 of the disc coating, the disc has the longest service life.
Example 6: a method for processing the surface of a disc for a disc separator comprises the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 is adopted for the treated disc, and the thickness of the hard chrome plating layer is 120 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished, and the load is controlled to be 100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness of Ra = 0.1.
Example 6 the results show that the disc life of a disc separator is: 7200 hours.
Example 7: a method for processing the surface of a disc for a disc separator comprises the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chromium on the surface of the disc, adopting a chromium plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 is selected for the treated disc, and the thickness of a hard chromium plating layer is 110 μm;
s4: and (3) electroplating post-treatment: the disc is finely polished, and the load is controlled to be 100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness Ra = 0.2.
Example 7 results show that the service life of the disc separator is as follows: 7200 hours.
Example 8: a method for processing the surface of a disc for a disc separator comprises the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chromium on the surface of the disc, adopting a chromium plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 is selected for the treated disc, and the thickness of a hard chromium plating layer is 110 μm;
s4: and (3) electroplating post-treatment: the disc is finely polished, and the load is controlled to be 100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness of Ra = 0.4.
Example 8 the results show that the disc life of a disc separator is: 4500 hours.
Example 9: a method for processing the surface of a disc for a disc separator comprises the following steps:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disc subjected to shot blasting until the surface of the disc is flat and free of burrs;
s3: electroplating: plating hard chromium on the surface of the disc, adopting a chromium plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 is selected for the treated disc, and the thickness of a hard chromium plating layer is 110 μm;
s4: and (3) electroplating post-treatment: the disc is finely polished, and the load is controlled to be 100g/cm2Water is used as a liquid coolant for spraying and cooling, and the polished disc has surface roughness Ra = 0.5.
Example 9 the results show that the disc life of a disc separator is: for 5000 hours.
The results of examples 6, 7, 8 and 9 were compared to obtain the following data:
surface roughness Coating thickness (μm) Coating Hardness (HV) Service life (hours)
0.1 120 750 7200
0.2 120 750 7200
0.3 120 750 7200
0.4 120 750 4500
0.5 120 750 5000
Examples 6, 7, 8, 9 gave the preferred results: when the surface roughness Ra of the disc coating is 0.1, 0.2 and 0.3, the thickness is 120 μm, and the hardness HV =750, the service life of the disc is longest.
The data of the comparative coating thicknesses of the embodiments 1, 2 and 3 show that the service life of the disc is longest when the thickness is 120 mu m;
comparing the hardness data of the plating layers in the examples 4 and 5 with the hardness HV750 of the plating layers in the examples 1, 2 and 3, the disc has the longest service life when the hardness HV of the plating layer is 750;
the comparative surface roughness data of examples 6, 7, 8 and 9 show that the disc has the longest service life when the coating surface roughness Ra is 0.1, 0.2 and 0.3.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is also intended to be covered by the appended claims. The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. A method for processing the surface of a disc for a disc separator is characterized by comprising the following steps:
s1: shot blasting: performing shot blasting treatment on the disc, wherein the pressure of a shot blasting machine is 0.3-0.8 MPa, the shot blasting distance is 200-400 mm, the shot blasting angle is 50-85 degrees, and the shot blasting treatment is performed until the shot blasting coverage rate of the disc is completely covered;
s2: electroplating pretreatment: polishing the disk subjected to shot blasting until the surface of the disk is flat and free of burrs;
s3: electroplating: plating hard chromium on the surface of the disc, wherein the microhardness value HV of the treated disc is more than or equal to 750;
s4: and (3) electroplating post-treatment: and (4) carrying out fine polishing on the disc, wherein the surface roughness Ra of the polished disc is less than or equal to 0.3.
2. A method for surface treatment of a disc for a disc separator as claimed in claim 1, wherein the shot blasting pressure of the shot blasting machine is 0.5 to 0.6MPa, the shot blasting distance is 250 to 350mm, and the shot blasting angle is 60 to 75 ° in step S1.
3. A method for surface treatment of a disc for a disc separator as claimed in claim 2, wherein the shot diameter of the shot blasting machine is selected from 0.5 to 1.5 mm.
4. A method for surface treatment of a disc for a disc separator according to claim 1, wherein in step S3, the hard chrome plating is performed by using a chrome plating solution at a temperature of 55-58 ℃.
5. A method for surface treatment of a disc for a disc separator as claimed in claim 1, wherein in step S3, the thickness of said hard chrome plating layer is selected to be 50-240 μm.
6. A method for surface treatment of a disc for a disc separator as claimed in claim 1, wherein said step S4, said finish polishing is mechanical polishing, and the load is controlled at 100-200g/cm2。
7. A method for surface treatment of a disc for a disc separator according to claim 1, wherein said finish polishing is performed by spraying liquid coolant to reduce temperature in step S4.
8. A method of surface treating a disc for a disc separator according to claim 1, comprising the steps of:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disk subjected to shot blasting;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 of the treated disc, and the thickness of the hard chrome plating layer is 120 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished with a load of 100g/cm2And water is used as a liquid coolant for spray cooling, and the surface roughness Ra =0.1 of the polished disk.
9. A method of surface treating a disc for a disc separator according to claim 1, comprising the steps of:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disk subjected to shot blasting;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 of the treated disc, and the thickness of the hard chrome plating layer is 120 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished with a load of 100g/cm2And water is used as a liquid coolant for spray cooling, and the surface roughness Ra =0.2 of the polished disc.
10. A method of surface treating a disc for a disc separator according to claim 1, comprising the steps of:
s1: shot blasting: carrying out shot blasting treatment on the disc, wherein the shot blasting pressure of a shot blasting machine is 0.5MPa, the shot blasting distance is 300mm, the shot blasting angle is 60 degrees, the shot blasting particle size of the shot blasting machine is 1mm, and the shot blasting coverage rate of the shot blasting machine is complete coverage;
s2: electroplating pretreatment: mechanically polishing the disk subjected to shot blasting;
s3: electroplating: plating hard chrome on the surface of the disc, adopting a chrome plating solution for plating, wherein the plating temperature is 55 ℃, the microhardness value HV =750 of the treated disc, and the thickness of the hard chrome plating layer is 120 mu m;
s4: and (3) electroplating post-treatment: the disc is finely polished with a load of 100g/cm2And water is used as a liquid coolant for spray cooling, and the surface roughness Ra =0.3 of the polished disk.
CN202010799521.3A 2020-08-11 2020-08-11 Method for treating surface of disc for disc type separator Pending CN114075681A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08174015A (en) * 1994-12-27 1996-07-09 Kawasaki Steel Corp Auxiliary roll of cold rolling mill for stainless steel and method for working surface thereof
US20050039511A1 (en) * 2003-03-14 2005-02-24 Prevey Paul S. Method and apparatus for providing a layer of compressive residual stress in the surface of a part
CN107815710A (en) * 2016-09-14 2018-03-20 中国石化扬子石油化工有限公司 A kind of process for improving chromium coating adhesion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08174015A (en) * 1994-12-27 1996-07-09 Kawasaki Steel Corp Auxiliary roll of cold rolling mill for stainless steel and method for working surface thereof
US20050039511A1 (en) * 2003-03-14 2005-02-24 Prevey Paul S. Method and apparatus for providing a layer of compressive residual stress in the surface of a part
CN107815710A (en) * 2016-09-14 2018-03-20 中国石化扬子石油化工有限公司 A kind of process for improving chromium coating adhesion

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