CN108034915B - Preparation method of abrasion-resistant coating on surface of grinding disc for grinding machine - Google Patents
Preparation method of abrasion-resistant coating on surface of grinding disc for grinding machine Download PDFInfo
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- CN108034915B CN108034915B CN201711370400.1A CN201711370400A CN108034915B CN 108034915 B CN108034915 B CN 108034915B CN 201711370400 A CN201711370400 A CN 201711370400A CN 108034915 B CN108034915 B CN 108034915B
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
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Abstract
Abrasive coating on surface of grinding disc for grinding machineThe preparation method comprises the following steps: pretreating the surface of the grinding disc and preparing a groove with a certain depth; pretreatment before spraying; FeCrBSi iron-based alloy powder, WC-17Co and NiCr-Cr are selected2C3The metal ceramic powder is used as raw material powder for preparing the wear-resistant coating, and is preheated and insulated after being mixed; the grinding disc is clamped on a special operating table, and the preheated composite powder material is sprayed on the surface of the grinding disc and the annular tooth grooves by adopting a supersonic flame spraying process to form a coating, wherein the thickness of the coating is 0.2-0.5 mm; and (3) placing the millstone after spraying into an oven, preserving heat for 2-3 hours at 150-200 ℃, cooling to below 50 ℃ along with the furnace, and discharging. The preparation method has simple process and easy operation, and the prepared coating is firmly combined with the grinding disc and has good wear resistance, thereby greatly increasing the wear resistance and the service life of the grinding disc and reducing the production cost.
Description
Technical Field
The invention belongs to the technical field of surface processing and modification, relates to a preparation method of a wear-resistant coating, and particularly relates to a preparation method of a wear-resistant coating on the surface of a grinding disc for a grinding machine.
Background
Emulsified asphalt provides a safer, energy-saving and environmentally friendly system than hot asphalt in many road construction applications because the process avoids high temperature operation, heating and harmful emissions. The normal temperature asphalt mixture refers to an asphalt mixture which is mixed at normal temperature and paved at normal temperature, and can also be called as a cold paving asphalt mixture. The binding material used for the normal temperature asphalt mixture is liquid asphalt or emulsified asphalt. In order to save energy and protect environment, the emulsified asphalt mixture is prepared by mixing emulsified asphalt and mineral aggregate mixture at normal temperature, forming an asphalt pavement after paving and compacting, and is divided into emulsified asphalt macadam mixture and emulsified asphalt concrete mixture according to the grading type of mineral aggregate. In the emulsified asphalt mixture, the requirements on the quality and specification of aggregates are basically the same as those of a hot-mix asphalt mixture, the emulsified asphalt is a bonding material of a slurry seal mixture, the quality of the emulsified asphalt directly influences the quality of a slurry seal, and the emulsified asphalt is mainly used for upgrading and maintaining roads, such as stone chip seal, and has various unique applications such as cold-mix materials and slurry seal which cannot be replaced by other asphalt materials. The emulsified asphalt can also be used for the construction of new roads, such as adhesive layer oil, permeable layer oil and the like.
The emulsified asphalt equipment is classified according to the process flow and can be divided into three types, namely an intermittent operation type, a semi-continuous operation type and a continuous operation type. The intermittent production equipment for modified emulsified asphalt is characterized by that when it is produced, the emulsifier, acid, water and latex modifier are mixed in the soap liquor mixing tank, then the above-mentioned mixed material and asphalt are pumped into the emulsifying mill, after the soap liquor in one tank is used up, the soap liquor can be prepared, then the next tank can be produced. The semi-continuous emulsified asphalt production equipment is characterized by that the intermittent emulsified asphalt equipment is equipped with soap liquor blending tank, so that the soap liquor can be alternatively blended, and the continuous feeding of soap liquor into the emulsifying mill can be ensured. At present, a considerable number of domestic emulsified bitumen production plants belong to this type. The continuous emulsified asphalt producing apparatus is one emulsion mill with emulsifier, water, acid, latex modifier, asphalt and other material and through pumping and mixing in conveying pipeline.
Because the tooth clearance of the emulsification mill is small, and the emulsifier is an acid medium, the emulsification mill has strong corrosivity, the stainless steel mill material is far from being used, the grinding wheel is corroded and damaged in the time of using less than two months by some domestic manufacturers for producing the emulsification mill because the tooth clearance of the emulsification mill is small, and some large enterprises are forced to purchase the expensive emulsification mill of German BWS company, and the supply period is long. Therefore, it is necessary to develop a wear-resistant coating on the surface of the grinding disc to increase the wear resistance of the grinding disc, so as to improve the service life of the grinding disc.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a wear-resistant coating on the surface of a grinding disc for a grinding machine, which has simple process and easy operation, the prepared coating is firmly combined with the grinding disc, the wear resistance is good, and the wear resistance and the service life of the grinding disc are greatly increased.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a wear-resistant coating on the surface of a grinding disc for a grinding machine is characterized by comprising the following steps:
1) pretreating the surface of the grinding disc and preparing an annular groove with the depth of 3-7 mm;
2) carrying out spraying pretreatment on the surface of the prepared millstone with the annular groove;
3) FeCrBSi iron-based alloy powder, WC-17Co and NiCr-Cr are selected2C3The metal ceramic powder is used as raw material powder for preparing the wear-resistant coating, and the mixture ratio is that 10-20% of metal ceramic powder by mass is added into iron-based alloy powder to prepare a composite powder material, wherein in the metal ceramic powder, the mass content of WC-17Co is 30-50%, and NiCr-Cr is2C3The mass content is 70-50%;
4) uniformly mixing the prepared composite powder material in a mixer, putting the mixture into an oven for preheating and heat preservation, wherein the preheating temperature is 155-165 ℃, and the heat preservation time is 2-3 hours;
5) clamping the millstone treated in the step 2) on an operation table, and spraying the preheated composite powder material in the step 4) on the surface of the millstone and tooth sockets and annular grooves by adopting a supersonic flame spraying process to form a coating, wherein the thickness of the coating is 0.2-0.5 mm;
6) and (3) putting the sprayed millstone into an oven, heating to 150-200 ℃, preserving heat for 2-3 hours, cooling to below 50 ℃ along with the furnace, and discharging.
Further, the pretreatment of the step 1) is to perform shot blasting and sand blasting treatment on the surface of the surface to be sprayed of the grinding disc, and the prepared tooth grooves and annular grooves are uniformly distributed and have consistent depth.
Further, the pretreatment before spraying in step 2) specifically includes: removing oil contamination impurities on the surface of the grinding disc by using acetone, carrying out sand blasting and coarsening treatment on the surface of the grinding disc by using white corundum sand, and thoroughly cleaning sand grains embedded at the bottoms of the tooth sockets and the annular grooves.
Further, the particle size of the iron-based alloy powder and the cermet powder of step 3) is 10 to 50 μm.
Finally, the depth of the annular groove is 5 mm.
Compared with the prior art, the invention has the advantages that:
1) the abrasive coating is sprayed on the grinding disc, so that the abrasive resistance of the surface of the grinding disc can be improved, the service life of the grinding disc can be prolonged, and the problem of repeated replacement of the grinding disc is solved;
2) the groove structure is prefabricated on the surface of a base body to be sprayed on the grinding disc, the coating is sprayed in the groove to form a base body coating structure with alternate hardness, the problems of the wear-resistant coating in the spraying and using processes can be solved, the stress of a coating/base body interface can be reduced on one hand, the combination area of the coating and the base body can be increased on the other hand, the combination performance of the coating is improved, and the anti-stripping performance and the use reliability of the wear-resistant coating can also be improved.
The preparation method has simple process and easy operation, and the prepared coating is firmly combined with the grinding disc and has good wear resistance, thereby greatly increasing the wear resistance and the service life of the grinding disc and reducing the production cost.
Drawings
FIG. 1 is a schematic structural view of a grinding disc provided by the present invention;
figure 2 is a photograph of a control abrasive disc before and after spraying.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example 1
A preparation method of a wear-resistant coating on the surface of a grinding disc for a grinding machine comprises the following steps:
(a) firstly, carrying out shot blasting and sand blasting treatment on the surface of a surface to be sprayed on the surface of the grinding disc, preparing an annular groove 1 with a certain depth on the surface of the grinding disc, wherein the depth is usually 3-7 mm, preferably 5mm, and the annular grooves 1 are uniformly distributed and have consistent depth;
(b) removing impurities such as oil stains and the like on the surface of the grinding disc treated in the step (a) by using acetone, carrying out sand blasting roughening treatment on the surface of the grinding disc by using brown and white corundum sand, and thoroughly cleaning sand grains embedded at the bottoms of the tooth grooves 2 and the annular grooves 1;
(c) FeCrBSi iron-based alloy powder, WC-17Co and NiCr-Cr are selected2C3The metal ceramic powder is used as spraying powder, and the metal ceramic powder with the mass ratio of 10 percent is added into an iron-based alloy powder material to prepare a composite powder material, wherein the content of WC-17Co in the metal ceramic powder is 30 percent, and the NiCr-Cr powder is2C3The content is 70 percent, and the mass content is adopted;
(d) uniformly mixing the composite powder material prepared in the step (c) in a mixer, and putting the mixture into an oven for preheating before spraying, wherein the preheating temperature is 160 ℃, and the heat preservation time is 2 hours;
(e) clamping the millstone treated in the step (b) on a special operating platform, and spraying a composite powder material on the surface of the millstone, the tooth grooves 2 and the annular grooves 1 by adopting a supersonic flame spraying process to form a coating, wherein the thickness of the coating is 0.2 mm;
(f) and (e) putting the millstone obtained in the step (e) into an oven, heating to 150 ℃, preserving heat for 3 hours, cooling to below 50 ℃ along with the furnace, and discharging.
Example 2
A preparation method of a wear-resistant coating on the surface of a grinding disc for a grinding machine comprises the following steps:
(a) firstly, carrying out shot blasting and sand blasting treatment on the surface of a surface to be sprayed on the surface of the grinding disc, preparing an annular groove 1 with a certain depth on the surface of the grinding disc, wherein the depth is usually 3-7 mm, preferably 5mm, and the annular grooves 1 are uniformly distributed and have consistent depth;
(b) removing impurities such as oil stains and the like on the surface of the grinding disc treated in the step (a) by using acetone, carrying out sand blasting roughening treatment on the surface of the grinding disc by using brown and white corundum sand, and thoroughly cleaning sand grains embedded at the bottoms of the tooth grooves 2 and the annular grooves 1;
(c) FeCrBSi iron-based alloy powder, WC-17Co and NiCr-Cr are selected2C3The metal ceramic powder is used as spraying powder, and the mixture ratio is that the metal ceramic powder with the mass ratio of 15 percent is added into an iron-based alloy powder material to prepare a composite powder material, wherein the content of WC-17Co in the metal ceramic powder is 40 percent, and the NiCr-Cr powder is2C3The content is 60 percent, and the mass content is adopted;
(d) uniformly mixing the composite powder material prepared in the step (c) in a mixer, and putting the mixture into an oven for preheating before spraying, wherein the preheating temperature is 160 ℃, and the heat preservation time is 2.2 hours;
(e) clamping the millstone treated in the step (b) on a special operating platform, and spraying a composite powder material on the surface of the millstone, the tooth grooves 2 and the annular grooves 1 by adopting a supersonic flame spraying process to form a coating, wherein the thickness of the coating is 0.3 mm;
(f) and (e) putting the millstone obtained in the step (e) into an oven, heating to 160 ℃, preserving heat for 2.5 hours, cooling to below 50 ℃ along with the furnace, and discharging.
Example 3
A preparation method of a wear-resistant coating on the surface of a grinding disc for a grinding machine comprises the following steps:
(a) firstly, carrying out shot blasting and sand blasting treatment on the surface of a surface to be sprayed on the surface of the grinding disc, preparing an annular groove 1 with a certain depth on the surface of the grinding disc, wherein the depth is usually 3-7 mm, preferably 5mm, and the annular grooves 1 are uniformly distributed and have consistent depth;
(b) removing impurities such as oil stains and the like on the surface of the grinding disc treated in the step (a) by using acetone, carrying out sand blasting roughening treatment on the surface of the grinding disc by using brown and white corundum sand, and thoroughly cleaning sand grains embedded at the bottoms of the tooth grooves 2 and the annular grooves 1;
(c) FeCrBSi iron-based alloy powder, WC-17Co and NiCr-Cr are selected2C3The metal ceramic powder is used as spraying powder, and the metal ceramic powder with the mass ratio of 18 percent is added into an iron-based alloy powder material to prepare a composite powder material, wherein the content of WC-17Co in the metal ceramic powder is 45 percent, and the NiCr-Cr powder is2C3The content is 55 percent by mass;
(d) uniformly mixing the composite powder material prepared in the step (c) in a mixer, and putting the mixture into an oven for preheating before spraying, wherein the preheating temperature is 160 ℃, and the heat preservation time is 2.5 hours;
(e) clamping the millstone treated in the step (b) on a special operating platform, and spraying a composite powder material on the surface of the millstone, the tooth grooves 2 and the annular grooves 1 by adopting a supersonic flame spraying process to form a coating, wherein the thickness of the coating is 0.4 mm;
(f) putting the millstone obtained in the step (e) into an oven, heating to 180 ℃, preserving heat for 2.2 hours, cooling to below 50 ℃ along with the furnace, and discharging;
example 4
A preparation method of a wear-resistant coating on the surface of a grinding disc for a grinding machine comprises the following steps:
(a) firstly, carrying out shot blasting and sand blasting treatment on the surface of a surface to be sprayed on the surface of the grinding disc, preparing an annular groove 1 with a certain depth on the surface of the grinding disc, wherein the depth is usually 3-7 mm, preferably 5mm, and the annular grooves 1 are uniformly distributed and have consistent depth;
(b) removing impurities such as oil stains and the like on the surface of the grinding disc treated in the step (a) by using acetone, carrying out sand blasting roughening treatment on the surface of the grinding disc by using brown and white corundum sand, and thoroughly cleaning sand grains embedded at the bottoms of the tooth grooves 2 and the annular grooves 1;
(c) FeCrBSi iron-based alloy powder, WC-17Co and NiCr-Cr are selected2C3The metal ceramic powder is used as spraying powder, the metal ceramic powder with the mass ratio of 20 percent is added into an iron-based alloy powder material to prepare a composite powder material, the content of WC-17Co in the metal ceramic powder is 50 percent, and NiCr-Cr in the metal ceramic powder2C3The content is 50 percent, and the mass content is adopted;
(d) uniformly mixing the composite powder material prepared in the step (c) in a mixer, and putting the mixture into an oven for preheating before spraying, wherein the preheating temperature is 160 ℃, and the heat preservation time is 3 hours;
(e) clamping the millstone treated in the step (b) on a special operating platform, and spraying a composite powder material on the surface of the millstone, the tooth grooves 2 and the annular grooves 1 by adopting a supersonic flame spraying process to form a coating, wherein the thickness of the coating is 0.5 mm;
(f) and (e) putting the millstone obtained in the step (e) into an oven, raising the temperature to 200 ℃, preserving the heat for 2 hours, cooling the millstone to below 50 ℃ along with the furnace, and discharging the millstone.
The grinding disc produced in the above embodiment example is tested and tried to show that the bonding strength of the coating and the grinding disc is 60 MPa-65 MPa. After the wear-resistant coating is sprayed, the service life of the service life is improved by 3 times, and is increased to 3000 hours from the original 1000 hours.
Claims (5)
1. A preparation method of a wear-resistant coating on the surface of a grinding disc for a grinding machine is characterized by comprising the following steps:
1) pretreating the surface of the grinding disc and preparing an annular groove with the depth of 3-7 mm;
2) carrying out spraying pretreatment on the surface of the prepared millstone with the annular groove;
3) FeCrBSi iron-based alloy powder, WC-17Co and NiCr-Cr are selected2C3The metal ceramic powder is used as raw material powder for preparing the wear-resistant coating, and the mixture ratio is that 10-20% of metal ceramic powder by mass is added into iron-based alloy powder to prepare a composite powder material, wherein in the metal ceramic powder, the mass content of WC-17Co is 30-50%, and NiCr-Cr is2C3The mass content is 70-50%;
4) uniformly mixing the prepared composite powder material in a mixer, putting the mixture into an oven for preheating and heat preservation, wherein the preheating temperature is 155-165 ℃, and the heat preservation time is 2-3 hours;
5) clamping the millstone treated in the step 2) on an operation table, and spraying the preheated composite powder material in the step 4) on the surface of the millstone and tooth sockets and annular grooves by adopting a supersonic flame spraying process to form a coating, wherein the thickness of the coating is 0.2-0.5 mm;
6) and (3) putting the sprayed millstone into an oven, heating to 150-200 ℃, preserving heat for 2-3 hours, cooling to below 50 ℃ along with the furnace, and discharging.
2. The method of claim 1, wherein: the pretreatment of the step 1) is to perform shot blasting and sand blasting treatment on the surface of the surface to be sprayed of the grinding disc, and the prepared tooth grooves and annular grooves are uniformly distributed and have consistent depth.
3. The method of claim 1, wherein: the pretreatment before spraying in the step 2) specifically comprises the following steps: removing oil contamination impurities on the surface of the grinding disc by using acetone, carrying out sand blasting and coarsening treatment on the surface of the grinding disc by using white corundum sand, and thoroughly cleaning sand grains embedded at the bottoms of the tooth sockets and the annular grooves.
4. The method of claim 1, wherein: the particle size of the iron-based alloy powder and the metal ceramic powder in the step 3) is 10-50 μm.
5. The method of claim 1, wherein: the depth of the annular groove is 5 mm.
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| CN110318907A (en) * | 2019-07-22 | 2019-10-11 | 西安方霖动力科技有限公司 | Rotary engine end cover structure, spray processes and application |
| CN111018534A (en) * | 2019-12-25 | 2020-04-17 | 西安鑫垚陶瓷复合材料有限公司 | Preparation method of ceramic matrix composite material component with abradable coating and component |
| CN110981520A (en) * | 2019-12-25 | 2020-04-10 | 西安鑫垚陶瓷复合材料有限公司 | Preparation method of ceramic matrix composite material component with abradable coating and component |
| CN115340410A (en) * | 2022-06-20 | 2022-11-15 | 武汉理工大学 | Ceramic-based sealing coating for surface of silicon carbide fiber-reinforced silicon carbide composite material and preparation method and application thereof |
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| CN2569971Y (en) * | 2002-09-24 | 2003-09-03 | 刘运良 | Diamond grinding table |
| CN100564572C (en) * | 2007-08-29 | 2009-12-02 | 凌天育 | Metal parts surface defects is repaired and antiseptic method |
| JP5399954B2 (en) * | 2009-09-07 | 2014-01-29 | 株式会社フジミインコーポレーテッド | Thermal spray powder |
| CN201768501U (en) * | 2010-07-06 | 2011-03-23 | 上海福岛化工科技发展有限公司 | High-speed shearing machine |
| CN203185154U (en) * | 2013-03-04 | 2013-09-11 | 深圳市竟业塑胶精密模具有限公司 | Millstone |
| CN203220880U (en) * | 2013-04-26 | 2013-10-02 | 杨剑英 | Dispersing, emulsifying and homogenizing colloid mill |
| CN103706279A (en) * | 2013-12-13 | 2014-04-09 | 杨剑英 | Fully-enclosed split type dispersing, emulsifying and homogenizing colloid mill |
| CN203878103U (en) * | 2014-06-13 | 2014-10-15 | 湖北国创高新材料股份有限公司 | Emulsified asphalt tester |
| CN106319430A (en) * | 2016-10-10 | 2017-01-11 | 扬州大学 | Preparation method of remanufactured coating for inner wall of air cylinder sleeve |
| CN206356054U (en) * | 2016-11-21 | 2017-07-28 | 山东阳春羊奶乳业有限公司 | A kind of lapping device for producing lactic acid bacteria goat milk beverage |
| CN106521400B (en) * | 2016-12-27 | 2018-12-11 | 扬州大学 | A kind of plasma transferred arc spraying method for strengthening heavy truck cylinder liner internal wall |
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Denomination of invention: A preparation method of wear-resistant coating on the surface of grinding disc for mill Effective date of registration: 20221129 Granted publication date: 20200221 Pledgee: CITIC Bank Limited by Share Ltd. Lishui branch Pledgor: ZHEJIANG WEIKENTE INTELLIGENT MACHINERY CO.,LTD. Registration number: Y2022330003330 |
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