CN112705703A - Method for preparing nano oxide dispersion strengthening high-temperature alloy powder by resonance mixing - Google Patents
Method for preparing nano oxide dispersion strengthening high-temperature alloy powder by resonance mixing Download PDFInfo
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- CN112705703A CN112705703A CN202110084024.XA CN202110084024A CN112705703A CN 112705703 A CN112705703 A CN 112705703A CN 202110084024 A CN202110084024 A CN 202110084024A CN 112705703 A CN112705703 A CN 112705703A
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/16—Metallic particles coated with a non-metal
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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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
A method for preparing nano oxide dispersion strengthening high-temperature alloy powder by resonance mixing belongs to the field of nano oxide dispersion strengthening materials. And (3) uniformly dispersing the nano oxide which is easy to agglomerate and difficult to disperse in the high-temperature alloy powder by a resonance mixing method, and uniformly coating the nano oxide particles on the surfaces of the high-temperature alloy powder particles to form a nano coating layer. Weighing a certain amount of nano oxide and high-temperature alloy powder, putting the nano oxide and the high-temperature alloy powder into a container of a resonance mixer for resonance mixing, and setting and adjusting resonance mixing time and resonance mixing intensity according to the quantity and particle size of the materials. The resonance mixing process can be continuous resonance mixing or intermittent resonance mixing. And after the resonant mixing is finished, obtaining the nano oxide dispersion strengthened high-temperature alloy powder. The nano oxide dispersion strengthened high-temperature alloy powder prepared by the method is used as a raw material, so that the high-temperature alloy obtained by subsequent thermal consolidation forming and subsequent thermal processing has uniform structure, fine crystal grains and no macrosegregation phenomenon, and the high-temperature strength, creep resistance and fatigue resistance of the high-temperature alloy are more excellent. The method is simple and convenient to operate, high in efficiency, low in energy consumption and free of environmental pollution, and can be applied to large-scale production of ODS high-temperature alloy.
Description
Technical Field
The invention relates to a method for preparing nanometer Oxide Dispersion Strengthened (ODS) high-temperature alloy powder by resonance mixing, belonging to the field of nanometer Oxide Dispersion Strengthened materials.
Background
Superalloys are used in the materials industry primarily for aerospace industry services. Along with the development of the aerospace industry, China has already established a high-temperature alloy system, so that a certain industrial scale is formed. High temperature alloys have been gradually applied to industrial fields such as electric power, automobiles, metallurgy, glass manufacturing, atomic energy and the like due to their excellent high temperature resistance, corrosion resistance, fatigue resistance and the like, thereby expanding the demand for high temperature alloys.
In the developed high-temperature alloy, precipitation strengthening is mostly adopted to improve the strength of the material, and when the service temperature of the material reaches a critical value, the precipitation phase inevitably aggregates, grows and dissolves, so that the high-temperature strength of the material is greatly reduced. Therefore, the high-temperature strength of the material is improved by uniformly adding fine nano-oxide into the alloy matrix through a powder metallurgy approach. However, it is impossible to uniformly add such fine nano-oxides into the matrix by the conventional smelting and metallurgical techniques, thereby limiting the development of such oxide dispersion strengthened alloys. The INCO company invented a new Mechanical Alloying (MA) process until the beginning of the 70 s, and basically solved the problem of uniform distribution of ODS alloy oxides, so that ODS high-temperature alloys were rapidly developed.
The Mechanical Alloying (MA) process, up to now, mainly uses the high-energy ball milling method. The chinese invention patent CN101823152B discloses a method for preparing alumina dispersion strengthened iron pre-alloyed powder by high energy ball milling. The high-energy ball milling method, in order to uniformly disperse the nano oxide, needs to disperse the nano oxide by ball milling for several hours or more, and has the following disadvantages: (1) grinding balls are required to be added, (2) the normal distribution of the particle size of the micron high-temperature alloy powder particles is widened by long-time ball milling, so that the expansion nonuniformity of the micron high-temperature alloy particles is aggravated in the subsequent heat treatment process, (3) the micron high-temperature alloy powder particles with the original spherical shape are flattened by long-time ball milling, so that the internal stress is generated in the subsequent heat treatment process, and (4) the longer the ball milling time is, the more grinding dust on the surfaces of the grinding balls and on the inner wall of a container is brought into the micron high-temperature alloy powder. Therefore, these all affect the performance of the ODS superalloy.
Disclosure of Invention
In order to solve the problems, the invention adopts a resonance mixing method to replace a ball milling method to prepare the nano oxide dispersion strengthening ODS high-temperature alloy powder.
The resonance mixing method is to mix by using the resonance mixing effect generated by the resonance principle and to pass through the low frequency (35-100 Hz) high intensity (400-1000 m/s)2) Stable resonance and realizationThe nano oxide fast and uniformly dispersed is characterized in that (1) grinding balls are not needed to be added, (2) one-pot mixing is carried out, no stirring slurry is used in the mixing process, (3) the efficiency is high, the time is short, only about one tenth of the time needed by a ball milling method is needed, (4) the original particle size of the micron high-temperature alloy powder particles is not changed, namely the normal distribution of the original particles is not changed, meanwhile, the original appearance of the micron high-temperature alloy powder particles is not changed, namely the original particles are not flattened, (5) the nano oxide which is easy to agglomerate and is difficult to disperse is rapidly depolymerized and uniformly dispersed, (6) in the mixing and dispersing process, the shearing force is small, the temperature rise is.
A method for preparing nano oxide dispersion strengthening high-temperature alloy powder by resonance mixing comprises the following preparation process.
Respectively weighing a certain amount of 20 nanometer oxide powder and 5 micrometer high-temperature alloy powder, wherein the purity of the nanometer oxide powder is 99 percent, and the weight of the nanometer oxide powder accounts for 2 percent of the total weight of all mixed powder. Weighing 20 nanometer oxide powder and 5 micron high temperature alloy powder, placing in a container for resonance mixing, and setting resonance mixing time for 3 minutes and resonance mixing intensity for 800m/s2After 3 minutes of resonant mixing was completed, the material was observed and the resonant mixing time was increased by another 2 minutes if necessary. And mixing to obtain nanometer oxide dispersion strengthened micron high temperature alloy powder for subsequent processing.
Compared with a ball milling method, the method has the beneficial effects that the nano oxides which are easy to agglomerate and difficult to disperse are quickly depolymerized and uniformly dispersed through resonance mixing and coated on the surfaces of the micron high-temperature alloy powder particles to form uniform nano coating layers. Meanwhile, grinding balls are not required to be added in the resonant mixing process, and introduction of foreign impurities is avoided. Moreover, in the resonant mixing process, the shearing force is small, the temperature rise is low, and the original particle size and the original particle morphology of the micron high-temperature alloy powder particles are not influenced. Therefore, the nano-oxide dispersion-strengthened high-temperature alloy powder prepared by the resonance mixing method has higher micro-visual quality, so that the performance of the subsequently processed ODS high-temperature alloy is more excellent.
Detailed Description
Example 1, a nano yttrium oxide dispersion strengthened iron-based superalloy powder.
Weighing 2 g of 20 nanometer yttrium oxide powder with the content of 99 percent and 98 g of 5 micron iron-based high-temperature alloy powder as raw materials, wherein the weight of the nanometer yttrium oxide accounts for 2 percent of the total weight of the whole mixed powder, putting the two powders into a container of a resonance mixer, and setting the resonance mixing time for 3 minutes and the resonance mixing intensity to be 800m/s2After the resonant mixer was started and resonant mixing was completed for 3 minutes, the material was observed and the resonant mixing time was increased by another 2 minutes if necessary. And after the mixing is finished, the iron-based high-temperature alloy powder with the nanometer yttrium oxide dispersion strengthened is obtained for subsequent processing.
Example 2, nano yttrium oxide dispersion strengthened nickel-base superalloy powder.
Weighing 2 g of 20 nanometer yttrium oxide powder with the content of 99 percent and 98 g of 5 micron nickel-based superalloy powder as raw materials, wherein the weight of the nanometer yttrium oxide accounts for 2 percent of the total weight of the whole mixed powder, putting the two powders into a container of a resonance mixer, and setting the resonance mixing time for 3 minutes and the resonance mixing strength to be 800m/s2After the resonant mixer was started and resonant mixing was completed for 3 minutes, the material was observed and the resonant mixing time was increased by another 2 minutes if necessary. After the mixing is finished, the nano yttrium oxide dispersion strengthened nickel-based high-temperature alloy powder is obtained for subsequent processing.
Example 3, nano yttrium oxide dispersion strengthened cobalt-based superalloy powder.
Weighing 2 g of 20 nanometer yttrium oxide powder with the content of 99 percent and 98 g of 5 micron cobalt-based high-temperature alloy powder as raw materials, wherein the weight of the nanometer yttrium oxide accounts for 2 percent of the total weight of the whole mixed powder, putting the two powders into a container of a resonance mixer, and setting the resonance mixing time for 3 minutes and the resonance mixing intensity to be 800m/s2After the resonant mixer was started and resonant mixing was completed for 3 minutes, the material was observed and the resonant mixing time was increased by another 2 minutes if necessary. After the mixing is finished, the cobalt-based high-temperature alloy powder with nano yttrium oxide dispersion strengthened is obtained for subsequent processing.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art within the technical scope of the present invention will be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A method for preparing nano oxide dispersion strengthening high-temperature alloy powder by resonance mixing is characterized in that a certain amount of nano oxide which is easy to agglomerate and difficult to disperse is uniformly coated on the surface of high-temperature alloy powder particles by a resonance mixing method to form a uniform nano oxide coating layer, so that the nano oxide dispersion strengthening high-temperature alloy powder is prepared.
2. The method of claim 1, wherein the resonant mixing is performed at a resonant mixing frequency of 35 to 100Hz and a resonant mixing intensity of 400 to 1000m/s2。
3. The method according to claim 1, wherein the nano-oxide is a nano-oxide having a particle size of not more than 100 nm, and the nano-oxide has a purity of not less than 99% and is present in an amount of 0.5 to 3.5% by weight based on the total weight of the mixed powder.
4. The method according to claim 1, wherein the superalloy powder is a micron iron-based superalloy powder, a micron nickel-based superalloy powder, or a micron cobalt-based superalloy powder having a particle size of 1 to 50 microns.
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| CN202110084024.XA CN112705703A (en) | 2021-01-21 | 2021-01-21 | Method for preparing nano oxide dispersion strengthening high-temperature alloy powder by resonance mixing |
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| CN202110084024.XA CN112705703A (en) | 2021-01-21 | 2021-01-21 | Method for preparing nano oxide dispersion strengthening high-temperature alloy powder by resonance mixing |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050223847A1 (en) * | 2004-02-10 | 2005-10-13 | Fuji Photo Film Co., Ltd. | Method of producing magnetic particles and reaction method using microreactor and microreactor |
| US20120280686A1 (en) * | 2011-05-06 | 2012-11-08 | The Regents Of The University Of California | Measuring biological tissue parameters using diffusion magnetic resonance imaging |
| CN103646777A (en) * | 2013-12-11 | 2014-03-19 | 江苏大学 | Method for preparing crystal boundary nano-composite intensified neodymium iron boron magnet |
| US20150290135A1 (en) * | 2012-11-16 | 2015-10-15 | Merck Sharp & Dohme Corp. | Process for making agglomerates using acoustic mixing technology |
| US20200399744A1 (en) * | 2019-06-21 | 2020-12-24 | United States Of America As Represented By The Administrator Of Nasa | Additively manufactured oxide dispersion strengthened medium entropy alloys for high temperature applications |
-
2021
- 2021-01-21 CN CN202110084024.XA patent/CN112705703A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050223847A1 (en) * | 2004-02-10 | 2005-10-13 | Fuji Photo Film Co., Ltd. | Method of producing magnetic particles and reaction method using microreactor and microreactor |
| US20120280686A1 (en) * | 2011-05-06 | 2012-11-08 | The Regents Of The University Of California | Measuring biological tissue parameters using diffusion magnetic resonance imaging |
| US20150290135A1 (en) * | 2012-11-16 | 2015-10-15 | Merck Sharp & Dohme Corp. | Process for making agglomerates using acoustic mixing technology |
| CN103646777A (en) * | 2013-12-11 | 2014-03-19 | 江苏大学 | Method for preparing crystal boundary nano-composite intensified neodymium iron boron magnet |
| US20200399744A1 (en) * | 2019-06-21 | 2020-12-24 | United States Of America As Represented By The Administrator Of Nasa | Additively manufactured oxide dispersion strengthened medium entropy alloys for high temperature applications |
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