CN111347057B - Rotary water flow atomization method for preparing superfine nearly spherical metal powder - Google Patents
Rotary water flow atomization method for preparing superfine nearly spherical metal powder Download PDFInfo
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- CN111347057B CN111347057B CN202010377348.8A CN202010377348A CN111347057B CN 111347057 B CN111347057 B CN 111347057B CN 202010377348 A CN202010377348 A CN 202010377348A CN 111347057 B CN111347057 B CN 111347057B
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- water flow
- spray disk
- atomized water
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- 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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- 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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
- B22F2009/0828—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid with water
-
- 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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention belongs to the technical field of new materials, and particularly discloses a rotary water flow atomization method for preparing superfine subsphaeroidal metal powder. The method specifically comprises the following steps: after the metal is melted, introducing the obtained molten metal into a high-pressure spray disk, and after the molten metal is delivered out of the high-pressure spray disk, entering an atomizing chamber; the atomized water flow sprayed from the high-pressure spray disk impacts the molten metal to crush the molten metal into fine nearly spherical metal powder; wherein an included angle formed by the atomized water flow and the diameter of the spray disk is alpha, the alpha is 0-30 degrees and is not 0; the angle formed by the atomized water flow and the vertical center line is beta, and the beta is 10-45 degrees. The invention designs a new atomization method, atomized water flows are not converged on one point any more, but form rotating water flows at an angle, and water return caused by impact of the atomized water flows is avoided. Meanwhile, the downward airflow takes away small liquid drops formed in the atomization process, and the powder is prevented from being adhered to form a satellite ball.
Description
Technical Field
The invention belongs to the technical field of new materials, and particularly relates to a rotary water flow atomization method for preparing superfine subsphaeroidal metal powder.
Background
With the rise of industries such as metal injection molding and soft magnetic materials, the demand of superfine nearly spherical powder in the market is increasing day by day, the metal powder prepared by the high-pressure water atomization method adopted at present forms an atomization focus in the atomization process, an airflow turbulence area is formed, and atomized fine liquid drops are inevitably adhered to large liquid drops, so that a satellite ball phenomenon is formed in the finished powder, and the flowability of the powder is reduced. In addition, in order to pursue the fine powder yield, the water pressure and the spraying vertex angle are increased, and the measures inevitably form upward splashing of atomized water and upward air pressure in an atomization area, so that the blockage in the atomization process is caused, and the production continuity is influenced.
Disclosure of Invention
In order to overcome the disadvantages and shortcomings of the prior art, the invention provides a rotary water flow atomization method for preparing superfine nearly spherical metal powder.
The purpose of the invention is realized by the following scheme:
a rotary water flow atomization method for preparing superfine nearly spherical metal powder comprises the following steps:
after the metal is melted, introducing the obtained molten metal into a high-pressure spray disk, and after the molten metal is delivered out of the high-pressure spray disk, entering an atomizing chamber; meanwhile, the atomized water flow sprayed from the high-pressure spray disk impacts the molten metal to crush the molten metal into fine nearly spherical metal powder;
wherein an included angle formed by the atomized water flow and the diameter of the spray disk is alpha, the alpha is 0-30 degrees and is not 0; the angle formed by the atomized water flow and the vertical center line is beta, and the beta is 10-45 degrees.
Preferably, the alpha is 10-20 degrees, and the beta is 20-40 degrees; most preferably, α is 15 ° and β is 30 °.
The metal is stainless steel, nickel-based alloy, cobalt-based alloy or copper-based alloy and the like.
Preferably, the pressure of the atomized water flow is 80-120 MPa, and the water amount is 60-120L/min; more preferably 110MPa, and the water amount is 100L/min.
Preferably, the atomization temperature is 100-200 ℃ above the metal melting point, and more preferably 150 ℃ above the metal melting point.
Compared with the prior art, the invention has the following advantages and beneficial effects:
aiming at the characteristics of easy water return and blockage in the conventional preparation process of superfine nearly spherical powder and more produced powder satellite balls, the invention designs a novel atomization method, atomized water flows are not converged on one point any more, but form rotary water flows at an angle, and the water return caused by impact of the atomized water flows is avoided. Meanwhile, the rotating water flow drives peripheral air flow to form downward suction, so that blockage caused by the upward air flow in the atomization process is avoided. Meanwhile, the downward air flow takes away small drops formed in the atomization process, and the problem that powder is adhered to form a satellite ball is avoided "
Drawings
FIG. 1 is a schematic diagram of the water atomization process for preparing spherical powder according to the present invention.
FIG. 2 is a graph of the morphology of the atomized powder obtained in example 1.
FIG. 3 is a graph showing the morphology of the atomized powder obtained in comparative example 1.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
The reagents used in the examples are commercially available without specific reference.
Referring to fig. 1, the atomized water streams of the present invention no longer converge at one point; viewed from the overlooking direction of the spray disk, an included angle formed by the atomized water flow and the diameter of the spray disk is alpha, wherein the alpha is 0-30 degrees and is not 0; seen from the side view direction of the spray plate, the included angle formed by the atomized water flow and the vertical center line is beta, and the beta is 10-45 degrees.
Example 1
Melting 316L stainless steel blocks serving as raw materials in a melting furnace, introducing the obtained molten metal into a high-pressure spray disk, and delivering the molten metal out of the high-pressure spray disk and then into an atomizing chamber; the atomized water flow sprayed from the high-pressure spray disk impacts the molten metal and crushes the molten metal into fine nearly spherical metal powder. Wherein the atomization temperature is 1640 ℃, the included angle alpha formed by the selected atomized water flow and the diameter of the spray disk is 15 degrees, and the included angle beta formed by the atomized water flow and the vertical center line is 30 degrees.
The morphology of the finally obtained metal powder is shown in fig. 2.
Comparative example 1
Melting 316L stainless steel blocks serving as raw materials in a melting furnace, introducing the obtained molten metal into a high-pressure spray disk, and delivering the molten metal out of the high-pressure spray disk and then into an atomizing chamber; the atomized water flow sprayed from the high-pressure spray disk impacts the molten metal and crushes the molten metal into fine nearly spherical metal powder. Wherein the atomization temperature is 1640 ℃, the included angle alpha formed by the selected atomized water flow and the diameter of the spray disk is 0 degree, and the included angle beta formed by the atomized water flow and the vertical center line is 60 degrees.
The morphology of the obtained powder is shown in fig. 3; and the atomization process is unstable and easy to return water and block the package.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. A rotary water flow atomization method for preparing superfine nearly spherical metal powder is characterized by comprising the following steps:
after the metal is melted, introducing the obtained molten metal into a high-pressure spray disk, and delivering the molten metal out of the high-pressure spray disk and then into an atomizing chamber; meanwhile, the atomized water flow sprayed from the high-pressure spray disk impacts the molten metal to crush the molten metal into fine nearly spherical metal powder;
wherein an included angle formed by the atomized water flow and the diameter of the spray disk is alpha, the alpha is 0-30 degrees and is not 0; the included angle formed by the atomized water flow and the vertical center line is beta, and the beta is 10-45 degrees;
the pressure of the atomized water flow is 80-120 MPa, and the water amount is 60-120L/min.
2. The rotary water atomization method of preparing ultra-fine nearly spherical metal powder of claim 1, characterized in that: the alpha is 10-20 degrees, and the beta is 20-40 degrees.
3. The rotary water atomization method for producing ultra-fine nearly spherical metal powder according to claim 1 or 2, characterized in that: the atomization temperature is 100-200 ℃ above the metal melting point.
4. The rotary water atomization method of preparing ultra-fine nearly spherical metal powder of claim 1, characterized in that:
the pressure of the atomized water flow is 110MPa, and the water amount is 100L/min;
the atomization temperature is 150 ℃ above the melting point of the metal.
5. The rotary water atomization method of preparing ultra-fine nearly spherical metal powder of claim 1, characterized in that: the metal is stainless steel, a nickel-based alloy, a cobalt-based alloy or a copper-based alloy.
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| CN202010377348.8A CN111347057B (en) | 2020-05-07 | 2020-05-07 | Rotary water flow atomization method for preparing superfine nearly spherical metal powder |
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| CN111347057B true CN111347057B (en) | 2021-04-23 |
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| CN113714505B (en) * | 2020-12-11 | 2023-12-01 | 石嘴山市铂唯新材料科技有限公司 | Precious metal alloy smelting and powder making water circulation all-in-one machine |
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| JPH10298614A (en) * | 1997-04-18 | 1998-11-10 | Daido Steel Co Ltd | Method for measuring angle of inclination of conical water screen, and manufacturing equipment for metal powder using the same |
| CN102112216A (en) * | 2008-06-27 | 2011-06-29 | 联邦科学及工业研究组织 | Granulation of molten material |
| US8057914B2 (en) * | 2007-03-26 | 2011-11-15 | Howmedica Osteonics Corp. | Method for fabricating a medical component from a material having a high carbide phase and such medical component |
| CN202283599U (en) * | 2011-09-28 | 2012-06-27 | 元磁新型材料(苏州)有限公司 | Atomizing spray nozzle |
| CN105290412A (en) * | 2015-11-03 | 2016-02-03 | 曾克里 | Atomizing method and device for preparing superfine near-spherical low-oxygen metal powder |
| JP6372440B2 (en) * | 2015-07-31 | 2018-08-15 | Ｊｆｅスチール株式会社 | Method for producing water atomized metal powder |
| CN109746454A (en) * | 2019-03-08 | 2019-05-14 | 石家庄京元粉末材料有限责任公司 | A kind of processing technology of stainless steel powder |
| CN109906128A (en) * | 2016-08-24 | 2019-06-18 | 伍恩加有限公司 | Low-melting-point metal or alloy powder are atomized production technology |
| CN210132055U (en) * | 2019-04-01 | 2020-03-10 | 江苏双宇镍业高科有限公司 | High-speed water atomizer for producing superfine powder |
-
2020
- 2020-05-07 CN CN202010377348.8A patent/CN111347057B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10298614A (en) * | 1997-04-18 | 1998-11-10 | Daido Steel Co Ltd | Method for measuring angle of inclination of conical water screen, and manufacturing equipment for metal powder using the same |
| US8057914B2 (en) * | 2007-03-26 | 2011-11-15 | Howmedica Osteonics Corp. | Method for fabricating a medical component from a material having a high carbide phase and such medical component |
| CN102112216A (en) * | 2008-06-27 | 2011-06-29 | 联邦科学及工业研究组织 | Granulation of molten material |
| CN202283599U (en) * | 2011-09-28 | 2012-06-27 | 元磁新型材料(苏州)有限公司 | Atomizing spray nozzle |
| JP6372440B2 (en) * | 2015-07-31 | 2018-08-15 | Ｊｆｅスチール株式会社 | Method for producing water atomized metal powder |
| CN105290412A (en) * | 2015-11-03 | 2016-02-03 | 曾克里 | Atomizing method and device for preparing superfine near-spherical low-oxygen metal powder |
| CN109906128A (en) * | 2016-08-24 | 2019-06-18 | 伍恩加有限公司 | Low-melting-point metal or alloy powder are atomized production technology |
| CN109746454A (en) * | 2019-03-08 | 2019-05-14 | 石家庄京元粉末材料有限责任公司 | A kind of processing technology of stainless steel powder |
| CN210132055U (en) * | 2019-04-01 | 2020-03-10 | 江苏双宇镍业高科有限公司 | High-speed water atomizer for producing superfine powder |
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