CN111571058A - Leakage repairing agent for castings and welding parts and preparation method thereof - Google Patents
Leakage repairing agent for castings and welding parts and preparation method thereof Download PDFInfo
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- CN111571058A CN111571058A CN202010344953.5A CN202010344953A CN111571058A CN 111571058 A CN111571058 A CN 111571058A CN 202010344953 A CN202010344953 A CN 202010344953A CN 111571058 A CN111571058 A CN 111571058A
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- parts
- agent
- castings
- alloy powder
- casting
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
- B22D31/002—Cleaning, working on castings
- B22D31/005—Sealing or impregnating porous castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention provides a leakage repairing agent for castings and welding parts, which is prepared from the following raw materials in parts by weight: 35 parts of hot-melt solid phenolic resin, 15 parts of curing agent, 25 parts of casting alloy powder, 14 parts of nickel alloy powder, 3 parts of copper sulfate, 1 part of sulfur, 4-5 parts of coloring agent and 2-3 parts of dehumidifying agent. The leakage repairing agent for the castings and the welding parts can be applied to leakage repairing of the castings and the welding parts of valves, pipelines, pump bodies and box bodies, the casting and the welding parts can be repaired and utilized, the casting yield is improved, the repairing effect is good, the using amount is saved, the cost is low, the castings and the welding parts repaired by the leakage repairing agent are not leaked after being pressed to 1.0Mpa for pressure maintaining for one hour, and then are pressed again after high-frequency vibration and shot blasting cleaning tests, the leakage is not leaked, and the rust prevention treatment of electrophoresis, zinc plating, paint spraying and the like is not influenced.
Description
Technical Field
The invention relates to the technical field of casting and welding part repairing, in particular to a leakage repairing agent for castings and welding parts and a preparation method thereof.
Background
Casting defects are always the most easily-appearing problems in the casting industry, main casting defects comprise air holes, sand holes and the like, the air holes are defects that gas does not escape in time before metal liquid crusts and holes are generated in castings, the casting repair adhesive is mainly used for repairing the defects of the castings such as steel, iron, copper, aluminum and the like, can also be used for repairing water tanks and oil tanks of automobiles and tractors and chemical pipelines and containers, and can be used for repairing parts with defects, so that the service performance of the castings is improved, and the service life of the castings is prolonged.
At present, the leakage repairing agents for castings and welding parts in the market are mainly four, the first is casting glue which can only repair the surface of the casting, the second is double-grouping liquid resin and a curing agent, the third is meltable solid resin, the fourth is vacuumized liquid resin infiltration repairing leakage, the fourth is a long-acting permanent casting leakage agent, particularly the second, third and fourth are secondary leakage induced by physical shrinkage and chemical oxidation corrosion generated along with time change, the castings are not high-temperature resistant after being repaired, the using environment cannot exceed 150 ℃, and the serious repairing effect of the casting leakage is not good.
Therefore, the research and development of a leakage repairing agent for castings and welding parts and a preparation method thereof, which have the advantages of good repairing effect, less consumption and low cost, are technical problems to be solved by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a leakage repairing agent for castings and welding parts and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a leakage repairing agent for castings and welding parts is prepared from the following raw materials in parts by weight: 35 parts of hot-melt solid phenolic resin, 15 parts of curing agent, 25 parts of casting alloy powder, 14 parts of nickel alloy powder, 3 parts of copper sulfate, 1 part of sulfur, 4-5 parts of coloring agent and 2-3 parts of dehumidifying agent.
Further, the leakage repairing agent for castings and welding parts is prepared from the following raw materials in parts by weight: 35 parts of hot-melt solid phenolic resin, 15 parts of curing agent, 25 parts of casting alloy powder, 14 parts of nickel alloy powder, 3 parts of copper sulfate, 1 part of sulfur, 5 parts of coloring agent and 2 parts of dehumidifying agent.
The adoption of the further beneficial effects is as follows: the coloring agent is used for making the color of the original casting consistent after being supplemented.
Further, the casting alloy powder is the same as the repaired casting in material.
The adoption of the further beneficial effects is as follows: the material is the same in order to keep consistent with the performance of the casting material.
Furthermore, the grain diameter of the casting alloy powder is not less than 1200 meshes.
The adoption of the further beneficial effects is as follows: the grain size of the casting alloy powder is selected to be larger than or equal to 1200 meshes, so that the permeability of the leakage repairing agent can be effectively improved, and the repairing effect is improved.
Further, the particle size of the nickel alloy powder is not less than 320 meshes.
The adoption of the further beneficial effects is as follows: the particle size of the nickel alloy powder is not less than 320 meshes, and the seepage repairing agent has strong seepage force.
The invention also provides a preparation method of the leakage repairing agent for castings and welding parts, which comprises the following steps:
(1) weighing the raw materials according to the leakage repairing agent for the casting and the welding part;
(2) adding hot-melt solid phenolic resin, casting alloy powder, nickel alloy powder, copper sulfate and sulfur into a rotary high-pressure reaction kettle for reaction;
(3) and (3) after the reaction in the step (2) is completed for half an hour, taking the reactant out of the kettle, cooling, grinding, sieving, adding a curing agent, a coloring agent and a dehumidifying agent, stirring and mixing to prepare the leakage repairing agent for castings and welding parts.
Further, the high-pressure reaction kettle in the step (1) is set to have the rotating speed of 120r/min, the temperature of 300 ℃, the pressure of 0.2Mpa and the reaction time of 2 h.
The adoption of the further beneficial effects is as follows: the high temperature and high pressure reaction can make the produced substances more uniform and stable.
Further, the step (3) is grinding to more than 600 meshes.
The adoption of the further beneficial effects is as follows: grinding to more than 600 meshes in the step (3), so that the seepage repairing agent has strong seepage force.
The invention principle is that when the solid meltable resin is added into the nano-scale memory alloy for use, the solid meltable resin can expand at about 200 ℃ (the principle that the memory alloy expands when heated) and produces violent reaction with the casting material to plug and leak the plug, and the invention has the beneficial effects that: the leakage repairing agent for the casting and the welding part can be applied to leakage repairing of the casting and the welding part of a valve, a pipeline, a pump body and a box body, and the like, so that the leakage repairing agent can be repaired and utilized, the yield of the casting is improved, the repairing effect is good, the using amount is saved, the cost is low, the casting and the welding part repaired by the leakage repairing agent are not leaked after being pressed to 1.0Mpa for pressure maintaining for one hour, and then the leakage is still not leaked after being pressed again after being subjected to high-frequency vibration and shot blasting cleaning tests. And the rust-proof treatments such as electrophoresis, galvanizing, paint spraying and the like are not affected.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The preparation method of the leakage repairing agent for castings and welding parts comprises the following steps:
(1) weighing 35 g of hot-melt solid phenolic resin, 15 g of curing agent, 25 g of casting alloy powder with the particle size of 1200 meshes, 14 g of nickel alloy powder with the particle size of 320 meshes, 3 g of copper sulfate, 1 g of sulfur, 4 g of coloring agent and 2 g of dehumidifying agent, wherein the casting alloy powder is the same as the repaired casting;
(2) adding hot-melt solid phenolic resin, casting alloy powder, nickel alloy powder, copper sulfate and sulfur into a rotary high-pressure reaction kettle for reaction, wherein the set rotating speed of the high-pressure reaction kettle is 120r/min, the temperature is 300 ℃, the pressure is 0.2Mpa, and the reaction time is 2 h.
(3) And (3) after the reaction in the step (2) is completed for half an hour, taking the reactant out of the kettle, cooling, grinding to 600 meshes, adding a curing agent, a coloring agent and a dehumidifying agent after screening, and stirring and mixing to prepare the leakage repairing agent for castings and welding parts.
Example 2
The preparation method of the leakage repairing agent for castings and welding parts comprises the following steps:
(2) weighing 35 g of hot-melt solid phenolic resin, 15 g of curing agent, 25 g of casting alloy powder with the particle size of 1300 meshes, 14 g of nickel alloy powder with the particle size of 350 meshes, 3 g of copper sulfate, 1 g of sulfur, 4 g of coloring agent and 3 g of dehumidifying agent, wherein the casting alloy powder is the same as the repaired casting;
(2) adding hot-melt solid phenolic resin, casting alloy powder, nickel alloy powder, copper sulfate and sulfur into a rotary high-pressure reaction kettle for reaction, wherein the set rotating speed of the high-pressure reaction kettle is 120r/min, the temperature is 300 ℃, the pressure is 0.2Mpa, and the reaction time is 2 h.
(3) And (3) after the reaction in the step (2) is completed for half an hour, taking the reactant out of the kettle, cooling, grinding to be more than 700 meshes, adding a curing agent, a coloring agent and a dehumidifying agent after screening, and stirring and mixing to prepare the leakage repairing agent for castings and welding parts.
Example 3
The preparation method of the leakage repairing agent for castings and welding parts comprises the following steps:
(3) weighing 35 g of hot-melt solid phenolic resin, 15 g of curing agent, 25 g of casting alloy powder with the particle size of 1400 meshes, 14 g of nickel alloy powder with the particle size of 400 meshes, 3 g of copper sulfate, 1 g of sulfur, 5 g of coloring agent and 3 g of dehumidifying agent, wherein the casting alloy powder is the same as the repaired casting;
(2) adding hot-melt solid phenolic resin, casting alloy powder, nickel alloy powder, copper sulfate and sulfur into a rotary high-pressure reaction kettle for reaction, wherein the set rotating speed of the high-pressure reaction kettle is 120r/min, the temperature is 300 ℃, the pressure is 0.2Mpa, and the reaction time is 2 h.
(3) And (3) after the reaction in the step (2) is completed for half an hour, taking the reactant out of the kettle, cooling, grinding to 800 meshes, adding a curing agent, a coloring agent and a dehumidifying agent after screening, and stirring and mixing to prepare the leakage repairing agent for castings and welding parts.
The leakage repairing agent prepared in the embodiment 1-3 is used for repairing casting pores, no leakage exists after the casting is pressed to 1.0Mpa and pressure is maintained for one hour, no leakage still exists after the casting is pressed again after subsequent treatment such as high-frequency vibration, shot blasting and the like, and the rust-proof treatment such as electrophoresis, galvanizing, paint spraying and the like is not influenced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The leakage repairing agent for castings and welding parts is characterized by being prepared from the following raw materials in parts by weight: 35 parts of hot-melt solid phenolic resin, 15 parts of curing agent, 25 parts of casting alloy powder, 14 parts of nickel alloy powder, 3 parts of copper sulfate, 1 part of sulfur, 4-5 parts of coloring agent and 2-3 parts of dehumidifying agent.
2. The leakage repairing agent for castings and welded parts according to claim 1, which is prepared from the following raw materials in parts by weight: 35 parts of hot-melt solid phenolic resin, 15 parts of curing agent, 25 parts of casting alloy powder, 14 parts of nickel alloy powder, 3 parts of copper sulfate, 1 part of sulfur, 5 parts of coloring agent and 2 parts of dehumidifying agent.
3. The agent of claim 1, wherein the casting alloy powder is the same material as the casting being repaired.
4. The agent for repairing seepage in castings and welded assemblies according to claim 1, wherein the grain size of the casting alloy powder is 1200 mesh or more.
5. The agent of claim 1, wherein the particle size of the nickel alloy powder is not less than 320 mesh.
6. A preparation method of a leakage repairing agent for castings and welding parts is characterized by comprising the following steps:
(1) weighing raw materials according to any one of the leakage repairing agent for castings and weldments of claims 1-5;
(2) adding hot-melt solid phenolic resin, casting alloy powder, nickel alloy powder, copper sulfate and sulfur into a rotary high-pressure reaction kettle for reaction;
(3) and (3) after the reaction in the step (2) is completed for half an hour, taking the reactant out of the kettle, cooling, grinding, sieving, adding a curing agent, a coloring agent and a dehumidifying agent, stirring and mixing to prepare the leakage repairing agent for castings and welding parts.
7. The method for preparing the leakage repairing agent for the castings and the welded parts according to the claim 6, wherein the high pressure reaction kettle in the step (1) is set to rotate at 120r/min, the temperature is 300 ℃, the pressure is 0.2MPa, and the reaction time is 2 h.
8. The method for preparing a leak repairing agent for castings and weldments as claimed in claim 6, wherein the grinding in step (3) is carried out to above 600 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344953.5A CN111571058A (en) | 2020-04-27 | 2020-04-27 | Leakage repairing agent for castings and welding parts and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344953.5A CN111571058A (en) | 2020-04-27 | 2020-04-27 | Leakage repairing agent for castings and welding parts and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111571058A true CN111571058A (en) | 2020-08-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010344953.5A Withdrawn CN111571058A (en) | 2020-04-27 | 2020-04-27 | Leakage repairing agent for castings and welding parts and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111571058A (en) |
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2020
- 2020-04-27 CN CN202010344953.5A patent/CN111571058A/en not_active Withdrawn
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Application publication date: 20200825 |