CN112961581A - Method for repairing metal surface damage without damage - Google Patents
Method for repairing metal surface damage without damage Download PDFInfo
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- CN112961581A CN112961581A CN202110131569.1A CN202110131569A CN112961581A CN 112961581 A CN112961581 A CN 112961581A CN 202110131569 A CN202110131569 A CN 202110131569A CN 112961581 A CN112961581 A CN 112961581A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- Chemical Kinetics & Catalysis (AREA)
- Macromonomer-Based Addition Polymer (AREA)
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Abstract
The invention provides a method for repairing metal surface damage without damage, which comprises the following steps: step S1, cleaning the surface of the metal to be repaired; step S2, after the surface of the metal to be repaired is dried, coating the repairing material on the metal to be repaired, and then heating the surface to be repaired; step S3, trimming the metal surface; wherein, by weight, the repair material comprises: 30-40 parts of unsaturated polyester resin, 8-15 parts of epoxidized styrene, 2-8 parts of propylene oxide, 5-10 parts of silicon carbide, 1-5 parts of tungsten carbide, 3-8 parts of carbon fiber, 1-2 parts of indium oxide, 3-6 parts of talcum powder, 4-10 parts of dibenzoyl peroxide and 1-2 parts of triphenyl lithium. The invention provides a method for repairing metal surface damage by using unsaturated polyester resin as a base material, and the repaired material has good surface performance and long service life.
Description
Technical Field
The invention relates to a method for repairing metal surface damage without damage.
Background
At present, the damage repair method for metal materials in various industries in China usually adopts welding and cementing. Although the methods can meet the production requirements to a certain extent, the welding environment requirements of welding repair are high, welded objects are easy to deform, and the cementing process requirements are high, so that the operation is complex.
There are some methods for repairing metal surfaces using epoxy-based repair materials, however, there is no systematic study in the art of repairing metal surfaces using other matrix materials, and it is unknown to those skilled in the art how to achieve the required performance of the protective layer during the repair of metal surfaces using other matrix materials.
Disclosure of Invention
The inventor in the field has conducted extensive research and provides a method for repairing metal surface damage without damage, unsaturated polyester resin is used as a base material when the metal surface damage is repaired, and a series of addition materials are added into the base material to enable a protective layer to achieve good performance, so that the metal surface is restored to the original shape, and the service life is prolonged.
According to a first aspect of the present invention, there is provided a method of non-destructively repairing wear on a metal surface, comprising the steps of:
step S1, cleaning the surface of the metal to be repaired;
step S2, after the surface of the metal to be repaired is dried, coating the repairing material on the metal to be repaired, and then heating the surface to be repaired;
step S3, trimming the metal surface;
wherein, by weight, the repair material comprises: 30-40 parts of unsaturated polyester resin, 10-15 parts of epoxidized styrene, 3-8 parts of propylene oxide, 5-10 parts of silicon carbide, 1-5 parts of tungsten carbide, 3-8 parts of carbon fiber, 1-2 parts of indium oxide, 3-6 parts of talcum powder, 4-10 parts of dibenzoyl peroxide and 1-2 parts of triphenyl lithium.
According to a preferred embodiment of the present invention, in step S1, the cleaning process is to clean the metal surface to be repaired by using acetone.
According to a preferred embodiment of the present invention, in the repair material, the silicon carbide has a particle size of not more than 5mm, and may be, for example, 5mm, 4.5mm, 4mm, 3.5mm, 3mm, 2.5mm, 2mm, 1.5mm, 1mm, 0.5mm, 0.1mm, 0.01mm and any value therebetween, and preferably consists of silicon carbide having a particle size of not more than 1mm, silicon carbide having a particle size of more than 1mm and not more than 3mm, and silicon carbide having a particle size of more than 3mm and not more than 5 mm.
According to a preferred embodiment of the present invention, the silicon carbide having a particle size of more than 3mm and not more than 5mm accounts for 30% or less of the total mass of the silicon carbide, and may be, for example, 30%, 25%, 24%, 23%, 22%, 20%, 15%, 10%, 5%, 3%, 2% or any value therebetween, and preferably 20 to 25%; the silicon carbide having a particle size of not more than 1mm accounts for 40% or more of the total mass of the silicon carbide, and may be, for example, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 96% or any value therebetween, and preferably 45 to 65%. The inventors of the present application have found that when silicon carbide particles having different particle size combinations are selected and the quality of the silicon carbide particles is within the above range, the repair performance of the resulting repair material is better.
According to a preferred embodiment of the invention, the monofilament diameter of the carbon fibers is 15 to 30 μm, for example 15 μm, 18 μm, 20 μm, 23 μm, 26 μm, 28 μm, 30 μm and any value therebetween, preferably 20 to 28 μm.
According to a preferred embodiment of the present invention, the carbon fiber includes carbon fiber having a length of 1 to 2mm (for example, the carbon fiber may have a length of 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm and any value therebetween) and carbon fiber having a length of 5 to 8mm (for example, the carbon fiber may have a length of 5mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6.0mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7.0mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, 8.0mm and any value therebetween). The carbon fibers with two lengths are selected, the long fibers can enhance the impact resistance of the repair material, the short fibers have better compatibility with the matrix than the long fibers, and the material performance can be comprehensively improved.
According to a preferred embodiment of the present invention, the mass ratio of the carbon fiber having a length of 1 to 2mm to the carbon fiber having a length of 5 to 8mm is 1: 1.
According to a preferred embodiment of the invention, the indium oxide has a particle size of less than 90 μm, for example 90 μm, 80 μm, 70 μm, 60 μm, 50 μm, 40 μm, 30 μm, 20 μm and any value in between, preferably 50-80 μm.
According to a preferred embodiment of the invention, the tungsten carbide has a particle size of 15-35 μm, for example 15 μm, 20 μm, 25 μm, 30 μm, 35 μm and any value in between.
According to a preferred embodiment of the present invention, the repair material used in the above repair method comprises, in parts by weight: 30-40 parts of unsaturated polyester resin, such as 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts and any value therebetween, and preferably 33-38 parts; 8 to 15 parts of epoxidized styrene, for example, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts and any value therebetween, preferably 10 to 12 parts; 2 to 8 parts of propylene oxide, for example, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts and any value therebetween, preferably 3 to 5 parts; 5-10 parts of silicon carbide, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts and any value therebetween, preferably 6-9 parts; 1-5 parts of tungsten carbide, such as 1 part, 2 parts, 3 parts, 4 parts, 5 parts and any value therebetween, preferably 2-4 parts, and 3-8 parts of carbon fiber, such as 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts and any value therebetween, preferably 5-7 parts; 1-2 parts of indium oxide, for example, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts and any value therebetween; 3-6 parts of talcum powder, such as 3 parts, 4 parts, 5 parts and 6 parts and any value therebetween, preferably 4-6 parts, 4-10 parts of dibenzoyl peroxide, such as 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts and 10 parts and any value therebetween, preferably 6-8 parts; 1-2 parts of triphenyllithium, for example, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, and any value therebetween. The repair material provided by the invention uses the epoxidized styrene, wherein the epoxidized styrene contains epoxy groups and unsaturated double bonds, the unsaturated double bonds can be subjected to free radical polymerization with unsaturated polyester resin, and the epoxy groups can be subjected to ring-opening polymerization with propylene oxide, so that the reaction products of the unsaturated polyester resin, the epoxidized styrene and the propylene oxide can form a network structure, and the network structure tightly surrounds other materials in the repair material, thereby enhancing the performance of the material. The repair material contains carbon fibers with two lengths, and the carbon fibers are inserted into the net structure and between the net structures, so that the performance of the material is further enhanced.
According to a preferred embodiment of the present invention, the repair material comprises, in parts by weight: 35 parts of unsaturated polyester resin, 12 parts of epoxidized styrene, 4 parts of propylene oxide, 8 parts of silicon carbide, 4 parts of tungsten carbide, 6 parts of carbon fiber, 2 parts of indium oxide, 5 parts of talcum powder, 6 parts of dibenzoyl peroxide and 1.6 parts of triphenyl lithium.
According to a preferred embodiment of the present invention, when preparing the repair material, an unsaturated polyester resin, epoxidized styrene, propylene oxide, and carbon fiber are mixed to obtain a mixture a; then mixing silicon carbide, tungsten carbide, indium oxide, talcum powder, dibenzoyl peroxide and triphenyl lithium to obtain a mixture B, and finally contacting the mixture A and the mixture B to mix the mixture A and the mixture B before coating the repairing material on the surface of the metal to be repaired.
According to a preferred embodiment of the present invention, the heating treatment is heating the repair material at 70-120 ℃ for 30-120min, under which conditions the unsaturated polyester resin, the epoxidized styrene and the propylene oxide are caused to react.
The method provided by the invention can be used for repairing the damage on the pump body or the water turbine impeller.
The invention provides a repair material taking unsaturated polyester resin as a matrix, wherein materials such as silicon carbide, tungsten carbide, carbon fiber, indium oxide, talcum powder and the like are added in the repair material for matching, the repair material can achieve the expected target, can play a good repair effect, and the abrasion resistance of the repair material is enhanced. In the repairing material, the styrene oxide, the propylene oxide and the unsaturated polyester resin are added to form a network structure, and the carbon fibers with different lengths are added, so that the abrasion and impact resistance of the material is further enhanced, the service life of a repaired part is prolonged, the flowability of the repairing material is good, the surface of the repaired part is smooth, and the damage of medium eddy current impact on the part can be reduced. The noise can be effectively reduced, the vibration can be reduced, and the cost and the maintenance cost can be saved.
Detailed Description
The present invention will be described in detail with reference to examples, but the present invention is not limited to the examples.
In the examples of the present invention, the unsaturated polyester resin used was UPR191 available from Jinnanqing chemical technology Co., Ltd, unless otherwise specified.
The other components are commercially available.
The impeller slices used in each of the following examples and comparative examples were impeller slices having the same cracks and surface damages treated in the same manner, i.e., the damages of the impeller slices in each example were the same.
Example 1
A method for nondestructive repair of impeller surface damage comprises the following steps:
step S1, repeatedly cleaning the surface of the impeller for 3 times by using acetone;
step S2, after the impeller surface was dried, the following repair materials were coated on the impeller surface, and then the impeller was heated at 100 ℃ for 40 min.
And step S3, trimming the blade contour line of the impeller and the bulge on the surface layer by using a file.
The repair material comprises the following components in parts by weight: 35 parts of unsaturated polyester resin, 12 parts of epoxidized styrene, 2 parts of propylene oxide, 8 parts of silicon carbide, 4 parts of tungsten carbide, 6 parts of carbon fiber, 2 parts of indium oxide, 5 parts of talcum powder, 6 parts of dibenzoyl peroxide and 1.6 parts of triphenyl lithium. Wherein the mass fraction of the silicon carbide with the particle diameter not more than 1mm in the silicon carbide is 50%, the mass fraction of the silicon carbide with the particle diameter more than 3mm and not more than 5mm is 20%, and the mass fraction of the silicon carbide with the particle diameter more than 1mm and not more than 3mm is 30%. The particle size of the tungsten carbide is 20 mu m; the particle size of the indium oxide is 40 mu m; the monofilament diameter of the carbon fiber is 25 μm, the carbon fiber comprises carbon fiber with a length of 1.5mm and carbon fiber with a length of 7mm, and the mass ratio of the two lengths of the fiber is 1: 1. when preparing the repair material, firstly mixing unsaturated polyester resin, epoxidized styrene, epoxypropane and carbon fiber to obtain a mixture A; then mixing silicon carbide, tungsten carbide, indium oxide, talcum powder, dibenzoyl peroxide and triphenyl lithium to obtain a mixture B, and finally contacting the mixture A and the mixture B to mix the mixture A and the mixture B before coating the repairing material on the surface of the metal to be repaired.
And (3) carrying out continuous fatigue test and impact test on the repaired impeller slice, wherein the test results are as follows: fatigue number 321, and impact energy 120J.
Example 2
Example 2 differs from example 1 only in that the repair material contains 4 parts of propylene oxide. Fatigue number 335 and impact work 132J.
Example 3
Example 3 differs from example 1 only in that the repair material contains 6 parts of propylene oxide. Fatigue number 325 and impact energy 118J.
Example 4
Example 4 differs from example 1 only in that the repair material contains 8 parts of propylene oxide. Fatigue number 318, impact energy 113J.
Example 5
Example 5 differs from example 1 only in that the carbon fibers used in the repair material are only carbon fibers having a length of 1.5 mm. Fatigue number 268, and impact work 99J.
Example 6
Example 6 differs from example 1 only in that the carbon fibers used in the repair material are only carbon fibers having a length of 7 mm. Fatigue number 259 and impact energy 101J.
Example 7
Example 7 differs from example 1 only in that the monofilament diameter of the carbon fiber used in the repair material was 45 μm. Fatigue number 267 and impact energy 106J.
Example 8
Example 8 differs from example 1 only in that the carbon fibers used in the repair material were carbon fibers having a length of 2mm and carbon fibers having a length of 10mm, and the mass ratio of the two carbon fibers was 1: 1. Fatigue number 309 and impact energy 109J.
Example 9
Example 9 differs from example 1 only in that the repair material has 8 parts styrene oxide. Fatigue number 322 and impact energy 115J.
Example 10
Example 10 differs from example 1 only in that the repair material has 15 parts styrene oxide. Fatigue number 318, and impact energy 117J.
Example 11
Example 11 differs from example 1 only in that the silicon carbide in the repair material is all silicon carbide with a particle size of more than 3mm and not more than 5mm, i.e. the silicon carbide with a particle size of more than 3mm and not more than 5mm is 100% of the total mass of the silicon carbide. Fatigue number 283, and impact energy 101J.
Example 12
Example 12 differs from example 1 only in that the repair material contains 40% by mass of silicon carbide having a particle size of not more than 1mm, 30% by mass of silicon carbide having a particle size of more than 3mm and not more than 5mm, and 30% by mass of silicon carbide having a particle size of more than 1mm and not more than 3 mm. Fatigue number 329 and impact work 127J.
Example 13
Example 13 differs from example 1 only in that the repair material contains 20% by mass of silicon carbide having a particle size of not more than 1mm, 50% by mass of silicon carbide having a particle size of more than 3mm and not more than 5mm, and 30% by mass of silicon carbide having a particle size of more than 1mm and not more than 3 mm. Fatigue number 317 and impact energy 118J.
Example 14
Example 14 differs from example 1 only in that the mass fraction of silicon carbide having a particle size of not more than 1mm in the repair material was 55%, the mass fraction of silicon carbide having a particle size of more than 3mm and not more than 5mm was 20%, and the mass fraction of silicon carbide having a particle size of more than 1mm and not more than 3mm was 25%. The number of fatigue 331 and the impact energy 129J.
Example 15
Example 15 differs from example 1 only in that the repair material contains 4 parts of talc. Fatigue number 332 and impact energy 124J.
Example 16
Example 16 differs from example 1 only in that the repair material comprises 6 parts talc. Fatigue number 328 and impact energy 123J.
Comparative example 1
Comparative example 1 differs from example 1 only in that the repair material does not contain styrene oxide. The fatigue times are 160, and the impact energy is 58J.
Comparative example 2
Comparative example 2 differs from example 1 only in that the repair material does not contain tungsten carbide and indium oxide. The fatigue number 153 and the impact energy are 47J.
Comparative example 3
Comparative example 3 differs from example 1 only in that the repair material does not contain propylene oxide. The fatigue number is 149, and the impact energy is 62J.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (10)
1. A method for non-destructive repair of metal surface damage comprising the steps of:
step S1, cleaning the surface of the metal to be repaired;
step S2, after the surface of the metal to be repaired is dried, coating the repairing material on the metal to be repaired, and then heating the surface to be repaired;
step S3, trimming the metal surface;
wherein, by weight, the repair material comprises: 30-40 parts of unsaturated polyester resin, 8-15 parts of epoxidized styrene, 2-8 parts of propylene oxide, 5-10 parts of silicon carbide, 1-5 parts of tungsten carbide, 3-8 parts of carbon fiber, 1-2 parts of indium oxide, 3-6 parts of talcum powder, 4-10 parts of dibenzoyl peroxide and 1-2 parts of triphenyl lithium.
2. The method according to claim 1, wherein in step S1, the cleaning process is to clean the metal surface to be repaired by using acetone.
3. A method according to claim 1 or 2, wherein the silicon carbide in the repair material has a particle size of no more than 5 mm.
4. A method according to any one of claims 1 to 3, wherein the silicon carbide in the repair material consists of silicon carbide having a particle size of no more than 1mm, silicon carbide having a particle size of greater than 1mm and no more than 3mm and silicon carbide having a particle size of greater than 3mm and no more than 5 mm.
5. The method according to claim 4, wherein the silicon carbide with the grain size of more than 3mm and not more than 5mm accounts for less than 30%, preferably 20-25% of the total mass of the silicon carbide; the silicon carbide with the grain diameter not more than 1mm accounts for more than 40 percent of the total mass of the silicon carbide, and preferably 45 to 65 percent.
6. The method according to any one of claims 1 to 4, wherein the monofilament diameter of the carbon fiber is 15 to 30 μm; the carbon fiber comprises carbon fiber with the length of 1-2mm and carbon fiber with the length of 5-8 mm.
7. The method according to any one of claims 1 to 6, wherein the indium oxide has a particle size of less than 90 μm.
8. The method according to any one of claims 1 to 7, wherein the tungsten carbide has a particle size of 15 to 35 μm.
9. The method according to any one of claims 1-8, wherein the repair material comprises, in parts by weight: 33-38 parts of unsaturated polyester resin, 10-12 parts of epoxidized styrene, 3-5 parts of propylene oxide, 6-9 parts of silicon carbide, 2-4 parts of tungsten carbide, 5-7 parts of carbon fiber, 1-2 parts of indium oxide, 4-6 parts of talcum powder, 6-8 parts of dibenzoyl peroxide and 1-2 parts of triphenyl lithium.
10. The method according to any one of claims 1-9, wherein the repair material comprises, in parts by weight: 35 parts of unsaturated polyester resin, 12 parts of epoxidized styrene, 4 parts of propylene oxide, 8 parts of silicon carbide, 4 parts of tungsten carbide, 6 parts of carbon fiber, 2 parts of indium oxide, 5 parts of talcum powder, 6 parts of dibenzoyl peroxide and 1.6 parts of triphenyl lithium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110131569.1A CN112961581A (en) | 2021-01-30 | 2021-01-30 | Method for repairing metal surface damage without damage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110131569.1A CN112961581A (en) | 2021-01-30 | 2021-01-30 | Method for repairing metal surface damage without damage |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4529757A (en) * | 1980-05-16 | 1985-07-16 | The Budd Company | Thermosetting resin patching compound |
| CN1673299A (en) * | 2005-03-09 | 2005-09-28 | 哈尔滨工业大学 | Fibrous unsaturated polyester putty |
| CN103692144A (en) * | 2013-12-31 | 2014-04-02 | 三一重工股份有限公司 | Method for repairing components by aid of mixtures of tungsten carbide particles and resin |
| CN109233553A (en) * | 2017-06-09 | 2019-01-18 | 上海邦聚工程材料技术有限公司 | A kind of the abrasion repair coating and restorative procedure of desulfurization slurry pump |
| CN109971142A (en) * | 2017-12-27 | 2019-07-05 | 长沙市比亚迪汽车有限公司 | A kind of composite repair material and preparation method thereof |
-
2021
- 2021-01-30 CN CN202110131569.1A patent/CN112961581A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4529757A (en) * | 1980-05-16 | 1985-07-16 | The Budd Company | Thermosetting resin patching compound |
| CN1673299A (en) * | 2005-03-09 | 2005-09-28 | 哈尔滨工业大学 | Fibrous unsaturated polyester putty |
| CN103692144A (en) * | 2013-12-31 | 2014-04-02 | 三一重工股份有限公司 | Method for repairing components by aid of mixtures of tungsten carbide particles and resin |
| CN109233553A (en) * | 2017-06-09 | 2019-01-18 | 上海邦聚工程材料技术有限公司 | A kind of the abrasion repair coating and restorative procedure of desulfurization slurry pump |
| CN109971142A (en) * | 2017-12-27 | 2019-07-05 | 长沙市比亚迪汽车有限公司 | A kind of composite repair material and preparation method thereof |
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