CN113832372B - Alloy powder, and preparation method, application and application method thereof - Google Patents
Alloy powder, and preparation method, application and application method thereof Download PDFInfo
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- CN113832372B CN113832372B CN202110955871.9A CN202110955871A CN113832372B CN 113832372 B CN113832372 B CN 113832372B CN 202110955871 A CN202110955871 A CN 202110955871A CN 113832372 B CN113832372 B CN 113832372B
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- smelting
- alloy powder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
- C23C4/08—Metallic material containing only metal elements
-
- 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
- C23C4/123—Spraying molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/041—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by mechanical alloying, e.g. blending, milling
Abstract
The invention belongs to the technical field of alloy metal. The invention provides an alloy powder, which comprises 5-10% of Ni, 1-2% of Nb, 0.05-0.08% of Hf, 0.01-0.04% of Ta and the balance of Al. According to the invention, the alloy powder is prepared by matching metals in a specific proportion, and the supersonic spraying technology is utilized to coat the metal surface, so that the cost is saved, the wear resistance and high temperature resistance of the coating are improved, the damage of the roll surface caused by pressure and shearing force in the rolling process can be effectively protected, the working efficiency is improved, and the working time is prolonged.
Description
Technical Field
The invention relates to the technical field of alloy metal, in particular to alloy powder, and a preparation method, application and an application method thereof.
Background
The rolls are important parts of rolling mills in steel rolling mills, and roll steel by using pressure generated when a pair or a group of rolls roll. Rolls are tools that plastically deform metal and are important consumable parts that determine the efficiency of a rolling mill and the quality of the rolled stock. The irregular depressions are formed on the surface of the roll along with the prolonging of the service time, and the depressions formed on the rolled material seriously affect the working efficiency and the service life of the roll. In order to improve the wear resistance of the surface of the roller, an electroplating method is mostly adopted at present, chromium is plated on the surface of the roller so as to protect the surface of the roller and prolong the working time. However, the process of electroplating chromium on the surface is not only costly but also produces industrial pollution. Therefore, a new method for protecting the roller is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides alloy powder, and a preparation method, application and an application method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides alloy powder which is prepared from the following components in percentage by mass: ni:5 to 10%, nb: 1-2%, hf:0.05 to 0.08%, ta:0.01 to 0.04 percent, and the balance of Al.
Preferably, the alloy powder has a particle size of 50 to 100 μm.
The invention also provides a preparation method of the alloy powder, which comprises the following steps: smelting the components to obtain an alloy ingot, and crushing to obtain the alloy powder.
Preferably, the degree of vacuum for the melting is 0.003 to 0.004Pa.
Preferably, the smelting is a first smelting, a second smelting and a third smelting which are sequentially carried out;
the current of the first smelting is 15-25A, and the time of the first smelting is 10-20 min;
the current of the second smelting is 40-45A, and the time of the second smelting is 15-25 min;
the current of the third smelting is 70-80A, and the time of the third smelting is 5-10 min.
The invention also provides application of the alloy powder in metal surface coating.
The invention also provides an application method of the alloy powder, which comprises the following steps: and (3) coating the alloy powder on the metal surface by adopting supersonic spraying.
Preferably, the temperature of the supersonic spraying is 150-200 ℃, and the air pressure of the supersonic spraying is 0.4-0.5 MPa.
Preferably, the powder feeding speed of the supersonic spraying is 40-50 g/min, the distance of the supersonic spraying is 18-20 cm, and the moving speed of a spray gun of the supersonic spraying is 1000-1500 mm/min.
Preferably, the flow rate of the propane sprayed at the supersonic speed is 35 to 40L/min, and the flow rate of the air sprayed at the supersonic speed is 200 to 300L/min.
The invention provides an alloy powder, which comprises 5-10% of Ni, 1-2% of Nb, 0.05-0.08% of Hf, 0.01-0.04% of Ta and the balance of Al. According to the invention, the alloy powder is prepared by matching metals in a specific proportion, and the supersonic spraying technology is utilized to coat the metal surface, so that the cost is saved, the wear resistance and the high temperature resistance of the coating are improved, the damage of the roll surface caused by pressure and shearing force in the rolling process can be effectively protected, the working efficiency is improved, and the working time is prolonged.
Detailed Description
The invention provides alloy powder which is prepared from the following components in percentage by mass: ni:5 to 10%, nb: 1-2%, hf:0.05 to 0.08%, ta:0.01 to 0.04 percent, and the balance of Al.
In the present invention, the mass fraction of Ni is 5 to 10%, preferably 6 to 9%, and more preferably 7 to 8%.
In the present invention, the mass fraction of Nb is 1 to 2%, preferably 1.2 to 1.8%, more preferably 1.4 to 1.6%.
In the present invention, the addition of Ni and Nb, which have ductility, can prevent the coating from being damaged by stress concentration during rolling, but the addition of too much Ni and Nb results in a decrease in the hardness of the coating; if the amount is too small, the coating may be damaged. Therefore, the mass fraction of Ni is controlled to be 5 to 10%, and the mass fraction of Nb is controlled to be 1 to 2%.
In the present invention, the mass fraction of Hf is 0.05 to 0.08%, preferably 0.06 to 0.07%, more preferably 0.064 to 0.066%.
In the present invention, the mass fraction of Ta is 0.01 to 0.04%, preferably 0.02 to 0.03%, and more preferably 0.024 to 0.026%.
In the invention, the addition of Hf and Ta can effectively improve the wear resistance of the coating, and the two metals are controlled in a proper range, so that the loss caused by over brittleness of the coating can be avoided.
In the present invention, the particle size of the alloy powder is preferably 50 to 100. Mu.m, more preferably 60 to 90 μm, and still more preferably 70 to 80 μm.
The invention also provides a preparation method of the alloy powder, which comprises the following steps: smelting the components to obtain an alloy ingot, and crushing to obtain the alloy powder.
In the present invention, the degree of vacuum for the melting is preferably 0.003 to 0.004Pa, more preferably 0.0032 to 0.0038Pa, and still more preferably 0.0034 to 0.0036Pa.
In the present invention, the melting is preferably a first melting, a second melting, and a third melting performed in this order.
In the present invention, the current for the first melting is preferably 15 to 25A, more preferably 16 to 24A, and still more preferably 18 to 22A; the first melting time is preferably 10 to 20min, more preferably 12 to 18min, and still more preferably 14 to 16min.
In the present invention, the current for the second melting is preferably 40 to 45A, more preferably 41 to 44A, and still more preferably 42 to 43A; the time for the second melting is preferably 15 to 25min, more preferably 16 to 24min, and still more preferably 18 to 22min.
In the present invention, the current for the third melting is preferably 70 to 80A, more preferably 72 to 78A, and still more preferably 74 to 76A; the time for the third melting is preferably 5 to 10min, more preferably 6 to 9min, and still more preferably 7 to 8min.
The invention also provides application of the alloy powder in metal surface coating.
The invention also provides an application method of the alloy powder, which comprises the following steps: and (3) coating the alloy powder on the metal surface by adopting supersonic spraying.
In the invention, the supersonic spraying temperature is preferably 150-200 ℃, more preferably 160-190 ℃, and more preferably 170-180 ℃; the air pressure of the supersonic spray is preferably 0.4 to 0.5MPa, more preferably 0.42 to 0.48MPa, and still more preferably 0.44 to 0.46MPa.
In the invention, the powder feeding rate of the supersonic spraying is preferably 40-50 g/min, more preferably 42-48 g/min, and more preferably 44-46 g/min; the distance of the supersonic spraying is preferably 18-20 cm, more preferably 18.4-19.6 cm, and more preferably 18.8-19.2 cm; the moving speed of the spray gun for supersonic spraying is preferably 1000-1500 mm/min, more preferably 1100-1400 mm/min, and even more preferably 1200-1300 mm/min.
In the present invention, the flow rate of propane sprayed at supersonic speed is preferably 35 to 40L/min, more preferably 36 to 39L/min, and still more preferably 37 to 38L/min; the air flow rate of the supersonic spraying is preferably 200 to 300L/min, more preferably 220 to 280L/min, and even more preferably 240 to 260L/min.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Weighing the following components in percentage by mass: 8% of Ni, 1.5% of Nb, 0.065% of Hf, 0.025% of Ta and 90.41% of Al.
Mixing the components, smelting at the vacuum degree of 0.0035Pa for 15min under the current of 20A to finish the first smelting; smelting for 20min under the current of 43A to finish the second smelting; smelting for 8min under the current of 75A to finish the third smelting; naturally cooling to room temperature after the smelting is finished to obtain an alloy ingot, and then crushing the alloy ingot to 75 microns to obtain alloy powder.
The alloy powder prepared in the embodiment is coated on the surface of metal by adopting a supersonic spraying mode, wherein the supersonic spraying temperature is 175 ℃, the air pressure is 0.45MPa, the powder feeding speed is 45g/min, the spraying distance is 19cm, the moving speed of a spray gun is 1250mm/min, the propane flow rate is 38L/min, and the air flow rate is 250L/min.
The coated metal coatings were tested for properties and the results are reported in table 1.
Example 2
Weighing the following components in percentage by mass: 5% of Ni, 1.8% of Nb, 0.05% of Hf, 0.04% of Ta and 93.11% of Al.
Mixing the components, then smelting, wherein the vacuum degree of smelting is 0.003Pa, and smelting for 20min under the current of 25A to finish first smelting; smelting for 25min under the current of 40A to finish second smelting; smelting for 10min under the current of 70A to finish the third smelting; naturally cooling to room temperature after the smelting is finished to obtain an alloy ingot, and then crushing the alloy ingot to 60 mu m to obtain alloy powder.
The alloy powder prepared in the embodiment is coated on the metal surface by adopting a supersonic spraying mode, wherein the supersonic spraying temperature is 160 ℃, the air pressure is 0.5MPa, the powder feeding speed is 50g/min, the spraying distance is 20cm, the moving speed of a spray gun is 1500mm/min, the propane flow rate is 40L/min, and the air flow rate is 230L/min.
The coated metal coatings were tested for properties and the results are reported in table 1.
Example 3
Weighing the following components in percentage by mass: 9% Ni, 1.6% Nb, 0.08% Hf, 0.01% Ta, 89.31% Al.
Mixing the components, then smelting, wherein the vacuum degree of smelting is 0.004Pa, and smelting for 11min under the current of 18A to finish the first smelting; smelting for 15min under the current of 45A to finish second smelting; smelting for 5min under the current of 80A to finish the third smelting; naturally cooling to room temperature after the smelting is finished to obtain an alloy ingot, and then crushing the alloy ingot to 80 mu m to obtain alloy powder.
The alloy powder prepared in the embodiment is coated on the metal surface by adopting a supersonic spraying mode, wherein the supersonic spraying temperature is 190 ℃, the air pressure is 0.4MPa, the powder feeding speed is 40g/min, the spraying distance is 18cm, the moving speed of a spray gun is 1000mm/min, the propane flow rate is 35L/min, and the air flow rate is 290L/min.
The coated metal coatings were tested for performance and the results are reported in table 1.
Comparative example 1
The comparative example differs from example 1 in that the mass fraction of Ni is 11.5%, the mass fraction of Al is modified accordingly, and the rest of the data is unchanged, and the prepared metal powder is coated in the same manner as in example 1.
The same performance test as that of comparative document 1 was performed on the coated metal coating layer, and the results are recorded in table 1.
Comparative example 2
This comparative example is different from example 1 in that the mass fraction of Ta is 0.08%, the mass fraction of Al is modified accordingly, and the rest of the data is unchanged, and the prepared metal powder is coated in the same manner as in example 1.
The same performance test as that of comparative document 1 was performed on the coated metal coating layer, and the results are recorded in table 1.
TABLE 1
According to the embodiment, the alloy powder provided by the invention has the advantages that the adhesion is high, the salt water resistance is up to 150 days, and the salt spray resistance is 1640 hours, so that the corrosion resistance of the metal powder after the metal powder forms a coating is excellent; the alloy powder provided by the invention has the hardness of 906HV, the highest shearing strength of 531MPa and outstanding wear resistance; the coating does not lose efficacy at 1950 ℃ and still has the protective effect. In the comparative example, the mass fractions of Ni and Ta are changed, and the performance of the coating is rapidly reduced, so that the alloy powder provided by the application has outstanding performance in the corresponding mass fraction range, and the base material can be effectively and comprehensively protected.
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 (9)
1. An alloy powder, characterized by being prepared from the following components in parts by mass: ni:5 to 10%, nb: 1-2%, hf:0.05 to 0.08%, ta:0.01 to 0.04 percent, and the balance of Al;
the preparation method of the alloy powder comprises the following steps: smelting the components to obtain an alloy ingot, and crushing to obtain the alloy powder;
the smelting is a first smelting, a second smelting and a third smelting which are sequentially carried out;
the current of the first smelting is 15-25A, and the time of the first smelting is 10-20 min;
the current of the second smelting is 40-45A, and the time of the second smelting is 15-25 min;
the current of the third smelting is 70-80A, and the time of the third smelting is 5-10 min.
2. The alloy powder according to claim 1, wherein the grain size of the alloy powder is 50 to 100 μm.
3. A method for producing an alloy powder according to claim 1 or 2, comprising the steps of: smelting the components to obtain an alloy ingot, and crushing to obtain the alloy powder;
the smelting is sequentially carried out as first smelting, second smelting and third smelting;
the current of the first smelting is 15-25A, and the time of the first smelting is 10-20 min;
the current of the second smelting is 40-45A, and the time of the second smelting is 15-25 min;
the current of the third smelting is 70-80A, and the time of the third smelting is 5-10 min.
4. The method according to claim 3, wherein the degree of vacuum of the melting is 0.003 to 0.004Pa.
5. Use of the alloy powder according to claim 1 or 2 for coating metal surfaces.
6. Method for applying an alloy powder according to claim 1 or 2, characterized in that it comprises the following steps: and (3) coating the alloy powder on the metal surface by adopting supersonic spraying.
7. The method of use according to claim 6, wherein the supersonic spray is at a temperature of 150 to 200 ℃ and the air pressure of the supersonic spray is 0.4 to 0.5MPa.
8. The application method as claimed in claim 6 or 7, wherein the powder feeding rate of the supersonic spraying is 40-50 g/min, the distance of the supersonic spraying is 18-20 cm, and the moving speed of the spray gun of the supersonic spraying is 1000-1500 mm/min.
9. The method of claim 8, wherein the supersonic spray propane flow rate is 35-40L/min and the supersonic spray air flow rate is 200-300L/min.
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| JP3769761B2 (en) * | 1994-04-28 | 2006-04-26 | 住友化学株式会社 | Aluminum alloy single crystal target and method for producing the same |
| JP5179604B2 (en) * | 2010-02-16 | 2013-04-10 | 株式会社神戸製鋼所 | Al alloy film for display devices |
| JP5967764B2 (en) * | 2012-09-12 | 2016-08-10 | 国立研究開発法人物質・材料研究機構 | Method for producing alloy powder for oxidation-resistant coating, method for producing alloy having excellent oxidation resistance characteristics using the powder, and method for producing member using the alloy |
| JP6698280B2 (en) * | 2015-05-15 | 2020-05-27 | 山陽特殊製鋼株式会社 | Alloy powder |
| EP3736352A4 (en) * | 2018-01-05 | 2020-12-02 | Sumitomo Electric Industries, Ltd. | Aluminum alloy wire and method for producing aluminum alloy wire |
| JP2020007594A (en) * | 2018-07-05 | 2020-01-16 | 昭和電工株式会社 | Aluminum alloy material, manufacturing method of aluminum alloy cast material, and manufacturing method of aluminum alloy powder extrusion material |
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