CN110684977A - Reinforced scraper - Google Patents
Reinforced scraper Download PDFInfo
- Publication number
- CN110684977A CN110684977A CN201911018034.2A CN201911018034A CN110684977A CN 110684977 A CN110684977 A CN 110684977A CN 201911018034 A CN201911018034 A CN 201911018034A CN 110684977 A CN110684977 A CN 110684977A
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- China
- Prior art keywords
- powder
- scraper
- reinforced
- strengthening
- hardness
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Classifications
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G19/00—Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors
- B65G19/18—Details
- B65G19/22—Impellers, e.g. push-plates, scrapers; Guiding means therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a reinforced scraper which comprises a scraper substrate and a reinforced layer coated on the surface of the scraper substrate, wherein the scraper substrate is made of low-alloy high-strength structural steel, the reinforced layer is formed by cladding a reinforced material on the surface of the scraper substrate by a laser cladding method, and the reinforced material is an iron-based reinforced material.
Description
Technical Field
The invention relates to a strengthened scraper, in particular to a scraper with a strengthened layer formed by laser cladding.
Background
Coal is a basic energy source and has great influence on industrial development. In 2017, the coal yield in China reaches 3445.00Mt, and the coal is the first in the world. In coal mining, a scraper conveyor is the most widely used equipment.
A scraper in the scraper conveyor is mainly made of low-alloy high-strength structural steel such as 16Mn and the like, the carbon content of the scraper is 0.1-0.25%, alloy elements mainly comprise manganese, silicon and the like, and the scraper conveyor is excellent in comprehensive performance, good in cold stamping performance, and good in obdurability and compressive strength. However, in the process of conveying coal, because coal often contains coal gangue in a certain proportion, the Mohs hardness reaches 6-7, the scouring wear on a coal conveying pipe is very serious, and the hardness of the low-alloy high-strength structural steel materials such as 16Mn and the like which are not strengthened is generally HRC 14-15, and the wear resistance is poor. The scraper conveyor not only increases the coal mining cost due to frequent replacement of the scraper, but also cannot meet the requirement of continuous work of coal mining transmission.
Patent publication No. CN106881167A discloses a method for laser strengthening a scraper, comprising the following steps: 1) polishing the surface of a scraper, derusting and deslagging, and deoiling and cleaning; 2) feeding powder and laser cladding are synchronously carried out in one process step under the feed motion coordination of an X linear shaft and a Y linear shaft of the laser head, and laser process parameters are set to form a laser strengthening layer with cladding thickness of 3 mm; the weight percentage of the selected metal powder material is as follows: 65.93% Fe, 0.07% C, 0.8% Si, 0.6% Mn, 18.1% Cr, 12.2% Ni, 2.3% Mo. However, the abrasion resistance and hardness of this patent are relatively poor.
The document "application of plasma cladding remanufacturing reinforcement technology for scraper conveyor" -Qinshui, Zhongzhou coal, 2016(10) mentions: the plasma cladding technology is adopted to carry out wear-resistant remanufacturing strengthening treatment on the worn scraper conveyor, and the application of the plasma cladding remanufacturing of the scraper conveyor in industrial production is researched. But the plasma cladding heat affected zone is large, the thermal deformation is large, and the cooling rate is slow.
Disclosure of Invention
The invention aims to provide a reinforced scraper which can improve the hardness and the wear resistance of the scraper, remarkably prolong the service life of the scraper and meet the requirement of continuous work of coal mining and transportation.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a reinforced scraper comprises a scraper substrate and a reinforcing layer coated on the surface of the scraper substrate, wherein the scraper substrate is made of low-alloy high-strength structural steel, the reinforcing layer is formed by cladding a reinforcing material on the surface of the scraper substrate by a laser cladding method, and the reinforcing material is an iron-based reinforcing material.
The technical scheme of the invention is further improved as follows: the iron-based reinforced material comprises the following components in percentage by weight: c, powder C: 1.65-1.90%, Si powder: 2.4-3.6%, Mn powder: 1.52-1.86%, Cr powder: 31-36%, Mo powder: 2.08-2.15%, Ni powder: 4.57-6.35%, Ti powder: 3.5-7.5% and the balance of Fe powder.
The technical scheme of the invention is further improved as follows: the components of the iron-based reinforced material are powder with the purity of more than 99%, and the particle size is as follows: 135- "mu-" 325 ".
The technical scheme of the invention is further improved as follows: the thickness of the strengthening layer is 1.6-2.2 mm, and the hardness is HV 700-750.
The technical scheme of the invention is further improved as follows: the low-alloy high-strength structural steel is 16 Mn.
The technical scheme of the invention is further improved as follows: the laser cladding method comprises the following process parameters: laser power: 2.8 ~ 4.0KW, rectangle facula: 2X 14mm, lap joint ratio: 30-50%, scanning speed: 450 to 650 mm/min.
Due to the adoption of the technical scheme, the invention has the technical progress that:
according to the invention, the reinforced material is cladded on the reinforced layer formed on the surface of the scraper substrate by a laser cladding method, the laser cladding power and the scanning speed are controlled, the hardness and the wear resistance of the scraper can be obviously improved, the wear resistance of the reinforced scraper lower alloy high-strength structure steel substrate is improved by 10 times, and the hardness is improved by 3 times; meanwhile, the strengthening layer has strong crack resistance, and the strengthening layer cannot crack under the action of locally concentrated high stress.
The C content reaches 1.65-1.9%, the Cr content reaches 31-36%, the prepared alloy powder belongs to high-carbon high-chromium alloy powder, a high-strength high-hardness martensite tissue structure with fine grain size is obtained in a laser cladding layer, and the hardness and the wear resistance of a strengthening layer are obviously improved; the content of Mo in the alloy powder is 2.08-2.15%, the element has the effect of refining grains, so that the cladding layer has higher toughness, and meanwhile, the Mo element is also a strengthening element, so that a solid solution or a carbide can be formed, and the wear resistance is improved; the addition of Ti enhances the corrosion resistance of the alloy layer, and plays an important role in maintaining the hardness capability of the alloy layer under the action of external force, which is the proportion given after the working condition and the damage form of the scraper are fully researched.
The strengthening layer and the scraper substrate are metallurgically combined, the dilution rate is lower than 5-8%, and the quality of the strengthening layer can be ensured not to be diluted by the scraper substrate.
The laser cladding method can adopt a laser numerical control processing system, has high automation degree and high production efficiency, and can ensure the uniform quality of products.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
the reinforced scraper comprises a scraper substrate and a reinforced layer coated on the surface of the scraper substrate, wherein the scraper substrate is made of low-alloy high-strength structural steel, and the low-alloy high-strength structural steel is 16 Mn. The strengthening layer is formed by cladding a strengthening material on the surface of the scraper substrate by a laser cladding method, the strengthening material is an iron-based strengthening material, the thickness of the strengthening layer is 1.6-2.2 mm, and the hardness is HV 700-750.
The iron-based reinforced material comprises the following components in percentage by weight: carbon powder: 1.65-1.90%, silicon powder: 2.4-3.6%, manganese powder: 1.52-1.86%, chromium powder: 31-36%, molybdenum powder: 2.08-2.15%, nickel powder: 4.57-6.35%, titanium powder: 3.5-7.5% and the balance of iron powder.
The components of the iron-based reinforced material are powder with the purity of more than 99 percent, and the particle size is as follows: 135- "mu-" 325 ".
The technological parameters of the laser cladding method are as follows: laser power: 2.8 ~ 4.0KW, rectangle facula: 2X 14mm, lap joint ratio: 30-50%, scanning speed: 450 to 650 mm/min.
Example 1:
preparing a reinforced material, which comprises the following components:
the components are powder with the purity of more than 99 percent, and the particle size is as follows: 135- "mu-" 325 ".
Then carrying out laser cladding treatment, which comprises the following specific steps:
cleaning the surface to be treated of the scraper made of the 16Mn and other low-alloy high-strength structural steel, and removing impurities such as oxide skin, oil stains and the like;
carrying out laser cladding treatment; the laser cladding process parameters are as follows: the laser power is: 3.3KW, rectangular facula is: 2X 14mm, the lap joint ratio is: 50%, the scanning speed is: 480 mm/min.
The thickness of the laser cladding strengthening layer is 2.0mm, and the hardness of the strengthening layer is HV 718.
And (3) carrying out hardness analysis on the strengthening layer and the scraper substrate:
the average hardness of the reinforced layer is HRC62 and the average hardness of the scraper substrate is HRC14.5 measured by a portable roller hardness tester.
The non-reinforced blade material and the reinforced layer material obtained in example 1 were subjected to a thrust ring friction pair test. The test conditions were: the test force is 800N, the test rotating speed is 200r/min, and the test results are shown in Table 1.
TABLE 1 Friction test results
| Material | Quality before grinding (g) | Mass after grinding (g) | Percent mass reduction (%) | Grinding time (min) |
| Not strengthened | 93.6253 | 93.5129 | 0.12 | 20 |
| After strengthening | 97.8756 | 97.8707 | 0.005 | 20 |
From the results in table 1, it is understood that the wear resistance of the strengthened layer is improved by 10 times or more as compared with the non-strengthened blade material after the laser cladding treatment.
Example 2
Preparing a reinforced scraper plate material, which comprises the following components:
the components are powder with the purity of more than 99 percent, and the particle size is as follows: 135- "mu-" 325 ".
Carrying out laser cladding treatment, wherein the laser cladding process parameters are as follows: the laser power is: 2.8KW, rectangular facula: 2X 14mm, the lap joint ratio is: 30%, the scanning speed is: 450 mm/min.
The thickness of the laser cladding strengthening layer is 1.6mm, and the hardness of the strengthening layer is HV 706.
And (3) carrying out hardness analysis on the strengthening layer and the substrate, and measuring the average hardness of the strengthening layer to be HRC60.5 and the average hardness of the substrate to be HRC14 by adopting a portable roller hardness tester in the experiment.
Example 3
Preparing a reinforced scraper plate material, which comprises the following components:
the components are powder with the purity of more than 99 percent, and the particle size is as follows: 135- "mu-" 325 ".
Then carrying out laser cladding treatment, wherein the laser cladding process parameters are as follows: the laser power is: 4.0KW, rectangular facula: 2X 14mm, the lap joint ratio is: 50%, the scanning speed is: 650 mm/min.
The thickness of the laser cladding strengthening layer is 2.2mm, and the hardness of the strengthening layer is HV 723.
And (3) carrying out hardness analysis on the strengthening layer and the substrate, and measuring the average hardness of the strengthening layer to be HRC63.5 and the average hardness of the substrate to be HRC15 by adopting a portable roller hardness tester in the experiment.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a reinforce scraper blade, includes scraper blade base member and cladding at the strengthening layer on scraper blade base member surface, the material of scraper blade base member is low-alloy high strength structural steel, its characterized in that: the strengthening layer is formed by cladding a strengthening material on the surface of the scraper substrate by a laser cladding method, and the strengthening material is an iron-based strengthening material.
2. The reinforced screed of claim 1 wherein: the iron-based reinforced material comprises the following components in percentage by weight: c, powder C: 1.65-1.90%, Si powder: 2.4-3.6%, Mn powder: 1.52-1.86%, Cr powder: 31-36%, Mo powder: 2.08-2.15%, Ni powder: 4.57-6.35%, Ti powder: 3.5-7.5% and the balance of Fe powder.
3. The reinforced screed of claim 2 wherein: the components of the iron-based reinforced material are powder with the purity of more than 99%, and the particle size is as follows: 135- "mu-" 325 ".
4. The reinforced screed of claim 1 wherein: the thickness of the strengthening layer is 1.6-2.2 mm, and the hardness is HV 700-750.
5. The reinforced screed of claim 1 wherein: the low-alloy high-strength structural steel is 16 Mn.
6. The reinforced screed of claim 1 wherein: the laser cladding method comprises the following process parameters: laser power: 2.8 ~ 4.0KW, rectangle facula: 2X 14mm, lap joint ratio: 30-50%, scanning speed: 450 to 650 mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911018034.2A CN110684977A (en) | 2019-10-24 | 2019-10-24 | Reinforced scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911018034.2A CN110684977A (en) | 2019-10-24 | 2019-10-24 | Reinforced scraper |
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| Publication Number | Publication Date |
|---|---|
| CN110684977A true CN110684977A (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911018034.2A Pending CN110684977A (en) | 2019-10-24 | 2019-10-24 | Reinforced scraper |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111624A (en) * | 2005-01-26 | 2008-01-23 | 卡特彼勒公司 | Composite overlay compound |
| CN101974749A (en) * | 2010-07-06 | 2011-02-16 | 山东建能大族激光再制造技术有限公司 | Method for strengthening scraper by laser |
-
2019
- 2019-10-24 CN CN201911018034.2A patent/CN110684977A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111624A (en) * | 2005-01-26 | 2008-01-23 | 卡特彼勒公司 | Composite overlay compound |
| CN101974749A (en) * | 2010-07-06 | 2011-02-16 | 山东建能大族激光再制造技术有限公司 | Method for strengthening scraper by laser |
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Application publication date: 20200114 |