CN113652685A - Roller surface strengthening process - Google Patents
Roller surface strengthening process Download PDFInfo
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- CN113652685A CN113652685A CN202110869078.7A CN202110869078A CN113652685A CN 113652685 A CN113652685 A CN 113652685A CN 202110869078 A CN202110869078 A CN 202110869078A CN 113652685 A CN113652685 A CN 113652685A
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- Prior art keywords
- tungsten powder
- roller
- parameters
- screening
- surface strengthening
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005728 strengthening Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 38
- 230000008021 deposition Effects 0.000 claims abstract description 15
- 238000012216 screening Methods 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000004615 ingredient Substances 0.000 claims abstract description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 238000009472 formulation Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000012986 modification Methods 0.000 abstract description 6
- 230000004048 modification Effects 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 description 8
- 239000003973 paint Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Images
Classifications
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0084—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ carbon or graphite as the main non-metallic constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to a roller surface strengthening process, which comprises the following steps: (1) screening and identifying deposited materials; (2) designing a formula and parameters of the ingredients; (3) coating a wear-resistant material on the roller; (4) and (4) performing laser deposition. The roller surface strengthening technology is a method for coating a deposited material on a roller and fusing the deposited material by using a laser technology, needs screening and identification of the deposited material, needs reasonable proportioning of the deposited material, needs reasonable modification of a deposition program and needs setting of a laser focal length, can strengthen the roller surface finally, increases red hardness, achieves the aim of improving the steel passing amount of a rolling groove in the rolling process, and has very important significance and popularization value.
Description
Technical Field
The invention belongs to a steel rolling process, and particularly relates to a roll surface strengthening process.
Background
At present, the material type control is realized by using rollers in a low-speed area of a steel rolling process, the materials of the rollers are medium nickel-chromium-molybdenum infinite chilled nodular cast iron and high nickel-chromium-molybdenum infinite chilled nodular cast iron, although the rollers have better comprehensive performance, the wear resistance of the rollers still cannot meet the requirements of steel rolling production, and particularly in medium rolling frame times, because the rolling groove is seriously worn, the roller pair phenomenon occurs, the rollers are forced to be replaced, the production organization is influenced, and the comprehensive performance of equipment is influenced. Therefore, the wear resistance of the roller needs to be overcome and broken through, and the roller surface strengthening technology is a novel technology for improving the steel passing amount by coating a layer of wear-resistant material on the surface of the roller and then melting the wear-resistant material into the surface of the roller by using a laser technology to improve the strength and hardness of the surface of the roller.
Disclosure of Invention
In order to solve the problems, the technical scheme of the invention is as follows:
1. screening and identification of deposited materials
The quality of the grinding material directly influences the quality of the surface of the roller after deposition, therefore, the quality screening and identification of tungsten powder are very important, tungsten mud ground by a workshop tungsten carbide roller ring is used directly after being dried in the self-made tungsten powder, but impurities of a plurality of alloy grinding wheels exist in the tungsten mud. Taking the self-made tungsten powder and the pure tungsten powder to a laboratory, observing the tungsten powder by using a microscope, magnifying the tungsten powder by 20 times, and observing that the self-made tungsten powder contains a lot of impurities larger than 200 mu m, wherein if the impurities are coated on the surface of the roller and combined with the roller, the impurities cannot be melted by using laser, so that the defects of cracks, meat falling and the like appear in the roller in use; by checking pure tungsten powder, impurities in the tungsten powder are less and the tungsten powder can be used, but due to a plurality of factors such as cost, the tungsten powder is temporarily screened by a 200-mesh screen, the impurities are screened, and finally the tungsten powder material with less impurities can be obtained.
The method comprises the following specific steps: weighing 500g of tungsten powder, placing the tungsten powder into a 200-mesh screening device, manually and uniformly shaking the screening device, dropping the tungsten powder smaller than 200 meshes into a storage, and removing the residual particles. The tungsten powder after screening can be subjected to the next step of batching.
2. And designing a formula and parameters of the ingredients.
In the deposition process, the proportion of the wear-resistant material is a key point of quality, and if the proportion error is large, the test can be directly failed integrally, so that the analysis reason is hindered. The wear-resistant material is formed by mixing tungsten powder, graphite powder and an adhesive together, but because the density of the tungsten powder is different from that of the graphite, the proportion is distorted by direct estimation by a spoon, and the weight proportion is invalid. Therefore, the weight of the graphite powder and the tungsten powder is directly measured by using an electronic scale, when the weight of the test scheme is about gram, the weight of the material can be directly measured, the weight is not poor, the effectiveness of the material proportion is ensured, and the volume of the adhesive is ensured by directly using a measuring cup for measurement.
The method comprises the following specific steps:
1) the proportion of the tungsten powder and the graphite is designed to match the wear-resistant material, so that the effective batching is ensured. The weight of the tungsten powder is as follows: 25-35g, graphite powder: 10-15g and 80-90ml of adhesive are mixed according to different proportions.
2) Parameters of a cladding machine tool are designed, and parameters such as power, focal length, rotating speed and the like are mainly set. The power is 2500 plus 3500KW, the focal length is 245 plus 285mm, the rotating speed is 2.5-2.7r/min, and the parameter setting is carried out to ensure that the parameters and the batching parameters are in the same design.
3) And adjusting the swinging head of the laser beam, adjusting the swinging head to the vertical bisector of half of the rolled groove, and adjusting the swinging head to the other end after half of the rolled groove is deposited.
3. And coating the wear-resistant material on the roller.
The method comprises the following specific steps: the wear-resistant material that will batching stirs evenly, starts the lathe main shaft, rotates the roll, is dipping in the material with the brush, applies paint with a brush to the roll surface, applies paint with a brush in-process and keeps the power even, can not appear leaking and brush the phenomenon, and it is accurate to apply paint with a brush 1mm thickness at last.
4. And (4) performing laser deposition.
The method comprises the following specific steps: opening the pressure chamber, opening the laser, starting the main shaft of the machine tool, closing the protective cover, starting the deposition, firstly performing half deposition on the rolling groove, after the deposition is finished, adjusting the swing head, and performing deposition on the other half of the rolling groove.
The roller surface strengthening technology is a new surface modification technology. The method is characterized in that a cladding material is added on the surface of a roller and is fused with a thin layer on the surface of the roller by a laser beam with high energy density, so that a cladding layer which is metallurgically bonded with the roller is formed on the surface of the roller. The laser cladding is a process method which is characterized in that a selected coating material is placed on the surface of a to-be-clad substrate in different material adding modes, a thin layer of the selected coating material is simultaneously melted with the surface of the substrate through laser irradiation, and the laser irradiation is rapidly solidified to form a surface coating which has extremely low dilution and is metallurgically combined with the substrate, so that the wear-resisting, corrosion-resisting, heat-resisting, oxidation-resisting and electrical properties of the surface of a base layer are obviously improved, the surface modification purpose is achieved, the requirements on the specific properties of the surface of the material are met, and the maintenance cost is saved. Compared with surfacing, spraying, electroplating and vapor deposition, laser deposition has the characteristics of small dilution, compact structure, good combination of a coating and a matrix, more suitable deposition materials, large particle size and content change and the like, so that the application prospect of the laser deposition technology is very wide.
The roller surface strengthening technology is a method of coating a deposited material on a roller and fusing the deposited material by using a laser technology, and needs screening and identification of the deposited material, reasonable proportioning of the deposited material, reasonable modification of a deposition program and setting of a laser focal length. Finally, the surface of the roller can be strengthened, the red hardness is increased, the purpose of improving the steel passing amount of the rolling groove in the rolling process is achieved, and the method has very important significance and popularization value.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
Example 1:
the deposited material is screened, impurities in the deposited material are screened out by a 200-mesh screen, the deposited material and graphite powder are mixed and stirred uniformly by proportioning, then the mixture is stirred by a binder to generate mud, and the surface of the roller is coated. And then setting laser parameters, adjusting the focal length and the laser power, setting the focal length and the laser power, adjusting the operation program, and setting the focal length and the laser power into two sections of melting and deposition to ensure the verticality of the laser on the rolling groove. And (5) after the deposition is finished, the steel wire is used in an online mode.
The invention has been described in an illustrative manner, and it is to be understood that the invention is not limited to the precise form disclosed, and that various insubstantial modifications of the inventive concepts and solutions, or their direct application to other applications without such modifications, are intended to be covered by the scope of the invention.
Claims (3)
1. A roll surface strengthening process, characterized by comprising:
(1) screening and identifying deposited materials;
(2) designing a formula and parameters of the ingredients;
(3) coating a wear-resistant material on the roller;
(4) and (4) performing laser deposition.
2. The roll surface strengthening process according to claim 1,
the screening and identification of the deposited materials in the step (1) are as follows: weighing 500g of tungsten powder, placing the tungsten powder into a 200-mesh screening device, manually and uniformly shaking the screening device, dropping the tungsten powder smaller than 200 meshes into a storage, removing the rest particles, and carrying out next-step batching on the tungsten powder after screening.
3. The roll surface strengthening process of claim 1, wherein the formulation and parameters of the ingredients designed in step (2) are as follows:
1) the proportion of the tungsten powder to the graphite is designed to match the wear-resistant material, so that the effective batching is ensured; the weight of the tungsten powder is as follows: 25-35g, graphite powder: 10-15g and 80-90ml of adhesive are mixed in different proportions;
2) parameters of a cladding machine tool are designed, and parameters of power, focal length and rotating speed are mainly set; setting parameters with the power of 2500-;
3) and adjusting the swinging head of the laser beam, adjusting the swinging head to the vertical bisector of half of the rolled groove, and adjusting the swinging head to the other end after half of the rolled groove is deposited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110869078.7A CN113652685A (en) | 2021-07-30 | 2021-07-30 | Roller surface strengthening process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110869078.7A CN113652685A (en) | 2021-07-30 | 2021-07-30 | Roller surface strengthening process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113652685A true CN113652685A (en) | 2021-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110869078.7A Pending CN113652685A (en) | 2021-07-30 | 2021-07-30 | Roller surface strengthening process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113652685A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1932079A (en) * | 2006-10-12 | 2007-03-21 | 沈阳大陆激光成套设备有限公司 | Laser nanometer cermet alloying process for surface of metallurgic hot roller |
| CN102337536A (en) * | 2011-10-26 | 2012-02-01 | 西安建筑科技大学 | Preparation technology for in-situ synthesis tungsten carbide particle reinforced composite wear-resisting layer on metal plate surface layer |
| CN102453902A (en) * | 2010-10-26 | 2012-05-16 | 沈阳大陆激光成套设备有限公司 | Method for preparing tungsten carbide hard alloy coating on surface of high-speed wire roller collar |
| US20120233974A1 (en) * | 2011-03-16 | 2012-09-20 | Daniel Cormier | Drive Roller for the Draper Canvas of a Crop Header |
| CN104493152A (en) * | 2014-12-03 | 2015-04-08 | 沈阳工业大学 | Powder used for laser-cladding zinc corrosion resistant cobalt-based alloy and preparation technology for modified layer |
| CN207362315U (en) * | 2017-10-24 | 2018-05-15 | 荆门德威格林美钨资源循环利用有限公司 | One kind is used for tungsten powder production line in waste hard grinding material |
| WO2019056227A1 (en) * | 2017-09-20 | 2019-03-28 | 杭州巨星科技股份有限公司 | Tool having cutting blade and manufacturing method therefor |
| CN110842199A (en) * | 2019-11-22 | 2020-02-28 | 中南大学 | Method for preparing pure tungsten component with complex structure by selective laser melting |
| CN113151827A (en) * | 2021-04-25 | 2021-07-23 | 中国海洋大学 | Wear-resistant coating with multistage island-shaped structure and preparation method thereof |
-
2021
- 2021-07-30 CN CN202110869078.7A patent/CN113652685A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| CN1932079A (en) * | 2006-10-12 | 2007-03-21 | 沈阳大陆激光成套设备有限公司 | Laser nanometer cermet alloying process for surface of metallurgic hot roller |
| CN102453902A (en) * | 2010-10-26 | 2012-05-16 | 沈阳大陆激光成套设备有限公司 | Method for preparing tungsten carbide hard alloy coating on surface of high-speed wire roller collar |
| US20120233974A1 (en) * | 2011-03-16 | 2012-09-20 | Daniel Cormier | Drive Roller for the Draper Canvas of a Crop Header |
| CN102337536A (en) * | 2011-10-26 | 2012-02-01 | 西安建筑科技大学 | Preparation technology for in-situ synthesis tungsten carbide particle reinforced composite wear-resisting layer on metal plate surface layer |
| CN104493152A (en) * | 2014-12-03 | 2015-04-08 | 沈阳工业大学 | Powder used for laser-cladding zinc corrosion resistant cobalt-based alloy and preparation technology for modified layer |
| WO2019056227A1 (en) * | 2017-09-20 | 2019-03-28 | 杭州巨星科技股份有限公司 | Tool having cutting blade and manufacturing method therefor |
| CN207362315U (en) * | 2017-10-24 | 2018-05-15 | 荆门德威格林美钨资源循环利用有限公司 | One kind is used for tungsten powder production line in waste hard grinding material |
| CN110842199A (en) * | 2019-11-22 | 2020-02-28 | 中南大学 | Method for preparing pure tungsten component with complex structure by selective laser melting |
| CN113151827A (en) * | 2021-04-25 | 2021-07-23 | 中国海洋大学 | Wear-resistant coating with multistage island-shaped structure and preparation method thereof |
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