CN113182526A - Preparation method of reduced nickel diffusion powder - Google Patents
Preparation method of reduced nickel diffusion powder Download PDFInfo
- Publication number
- CN113182526A CN113182526A CN202110432912.6A CN202110432912A CN113182526A CN 113182526 A CN113182526 A CN 113182526A CN 202110432912 A CN202110432912 A CN 202110432912A CN 113182526 A CN113182526 A CN 113182526A
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- Prior art keywords
- powder
- reduced nickel
- reduction
- nickel diffusion
- diffusion powder
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Classifications
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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
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
- B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
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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
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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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
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a preparation method of reduced nickel diffusion powder, which comprises the following steps: s1, taking nickel carbonate as a raw material; s2, introducing hydrogen into the boat-pushing type reduction furnace for reduction at the reduction temperature of 500-600 ℃, the boat loading amount of 2-4 kg, the reduction time of 8-12 h and the hydrogen flow of 5-6m3H; s3, protecting the spongy reduced nickel powder obtained after reduction by using carbon dioxide gas; s4, crushing and grading by using a nitrogen closed circulating jet mill to obtain powdery reduced nickel diffusion powder; and S5, carrying out batch combination to obtain the finished product of the reduced nickel diffusion powder. Compared with the diamond tool made of matrix powder produced by a conventional water atomization method, the sharpness of the diamond tool is improved by 12-25%, and the working efficiency is greatly improved; the produced powder has fine granularity and higher surface energy, and provides driving force for the sintering process; oxygen contentLow, is beneficial to the diffusion of atoms in the sintering process, combines powder, is beneficial to the formation of sintering necks in the sintering process, and ensures that the density of sintered blocks is higher.
Description
Technical Field
The invention relates to the technical field of reduced nickel diffusion powder, in particular to reduced nickel diffusion powder and a preparation method thereof.
Background
The manufacturing method of the reduced nickel powder on the market at present is generally an atomization method, and the defects of the atomization method for producing the reduced nickel powder are as follows: 1. the fine powder rate is low (70-80%); 2. the compactness of the product is poor, the compression performance is poor, and the folding resistance of the product is reduced; 3. has poor eutectic property with other metals.
Disclosure of Invention
The invention aims to provide a preparation method of reduced nickel diffusion powder, which provides a high-quality raw material for a high-end pouring process and effectively improves the ductility and compactness of metal, aiming at the defects and shortcomings of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the preparation method of the reduced nickel diffusion powder has the innovation points that the preparation method comprises the following steps:
s1, taking nickel carbonate as a raw material;
s2, introducing hydrogen into the boat-pushing type reduction furnace for reduction at the reduction temperature of 500-600 ℃, the boat loading amount of 2-4 kg, the reduction time of 8-12 h and the hydrogen flow of 5-6m3/h；
S3, protecting the spongy reduced nickel powder obtained after reduction by using carbon dioxide gas;
s4, crushing and grading by using a nitrogen closed circulating jet mill to obtain powdery reduced nickel diffusion powder;
and S5, carrying out batch combination to obtain the finished product of the reduced nickel diffusion powder.
The invention has the beneficial effects that:
the yield of the invention is more than 90 percent, and the yield of the traditional atomization method is only 70 to 80 percent, thereby greatly reducing energy consumption and loss; the nickel carbonate powder has the advantages that in the high-temperature decomposition and fission process and the later-stage cooling and condensation process, the same molecules of the reduced nickel are mutually adhered to form a polymerized crystal, the voidage is uniform, the eutectic property with other metals is enhanced, the formability, the folding strength and the service life of the product are effectively improved, and the service performance of the product is obviously improved.
Detailed Description
The present invention will be further described with reference to the following embodiments.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
A preparation method of reduced nickel diffusion powder comprises the following steps:
s1, taking nickel carbonate as a raw material;
s2, and then reducing by introducing hydrogen into the push boat type reducing furnaceThe original reduction temperature is 500 ℃, the boat loading amount is 2 kg, the reduction time is 8 hours, and the hydrogen flow is 5m3/h；
S3, protecting the spongy reduced nickel powder obtained after reduction by using carbon dioxide gas;
s4, crushing and grading by using a nitrogen closed circulating jet mill to obtain powdery reduced nickel diffusion powder;
and S5, carrying out batch combination to obtain the finished product of the reduced nickel diffusion powder.
The reduced nickel powder produced by the method is spherical; the Fisher size is 1.0-1.5 μm, the oxygen content is less than 0.40%, and the apparent density is 1.0-2.0g/cm3(ii) a The particle size distribution D50 is between 10.00 and 20.00 mu m.
Example 2
A preparation method of reduced nickel diffusion powder comprises the following steps:
s1, taking nickel carbonate as a raw material;
s2, introducing hydrogen into the boat-pushing type reducing furnace for reduction at the reduction temperature of 600 ℃, the boat loading amount of 4 kg, the reduction time of 12 hours and the hydrogen flow of 6m3/h；
S3, protecting the spongy reduced nickel powder obtained after reduction by using carbon dioxide gas;
s4, crushing and grading by using a nitrogen closed circulating jet mill to obtain powdery reduced nickel diffusion powder;
and S5, carrying out batch combination to obtain the finished product of the reduced nickel diffusion powder.
The reduced nickel powder produced by the method is spherical; the Fisher size is 1.0-1.5 μm, the oxygen content is less than 0.40%, and the apparent density is 1.0-2.0g/cm3(ii) a The particle size distribution D50 is between 10.00 and 20.00 mu m.
Example 3
A preparation method of reduced nickel diffusion powder comprises the following steps:
s1, taking nickel carbonate as a raw material;
s2, introducing hydrogen into the boat-pushing type reducing furnace for reduction at the reduction temperature of 550 ℃, wherein the boat loading amount is 3 kgReduction time 10 hours, hydrogen flow 5.5m3/h；
S3, protecting the spongy reduced nickel powder obtained after reduction by using carbon dioxide gas;
s4, crushing and grading by using a nitrogen closed circulating jet mill to obtain powdery reduced nickel diffusion powder;
and S5, carrying out batch combination to obtain the finished product of the reduced nickel diffusion powder.
The reduced nickel powder produced by the method is spherical; the Fisher size is 1.0-1.5 μm, the oxygen content is less than 0.40%, and the apparent density is 1.0-2.0g/cm3(ii) a The particle size distribution D50 is between 10.00 and 20.00 mu m.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (1)
1. The preparation method of the reduced nickel diffusion powder is characterized by comprising the following steps of:
s1, taking nickel carbonate as a raw material;
s2, introducing hydrogen into the boat-pushing type reduction furnace for reduction at the reduction temperature of 500-600 ℃, the boat loading amount of 2-4 kg, the reduction time of 8-12 h and the hydrogen flow of 5-6m3/h；
S3, protecting the spongy reduced nickel powder obtained after reduction by using carbon dioxide gas;
s4, crushing and grading by using a nitrogen closed circulating jet mill to obtain powdery reduced nickel diffusion powder;
and S5, carrying out batch combination to obtain the finished product of the reduced nickel diffusion powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432912.6A CN113182526A (en) | 2021-04-22 | 2021-04-22 | Preparation method of reduced nickel diffusion powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110432912.6A CN113182526A (en) | 2021-04-22 | 2021-04-22 | Preparation method of reduced nickel diffusion powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113182526A true CN113182526A (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110432912.6A Pending CN113182526A (en) | 2021-04-22 | 2021-04-22 | Preparation method of reduced nickel diffusion powder |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109663926A (en) * | 2019-03-04 | 2019-04-23 | 江苏萌达新材料科技有限公司 | A kind of cochrome powder and preparation method thereof |
| CN109692969A (en) * | 2019-03-04 | 2019-04-30 | 江苏萌达新材料科技有限公司 | A kind of preparation method of hypoxemia superfine spherical cobalt powder |
| CN109702217A (en) * | 2019-03-04 | 2019-05-03 | 江苏萌达新材料科技有限公司 | A kind of iron cobalt-copper alloy powder and preparation method thereof |
| CN111570784A (en) * | 2020-04-27 | 2020-08-25 | 江苏萌达新材料科技有限公司 | Preparation method of iron-copper alloy diffusion powder |
| CN111570819A (en) * | 2020-04-27 | 2020-08-25 | 江苏萌达新材料科技有限公司 | Preparation method of iron-copper-phosphorus alloy diffusion powder |
-
2021
- 2021-04-22 CN CN202110432912.6A patent/CN113182526A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109663926A (en) * | 2019-03-04 | 2019-04-23 | 江苏萌达新材料科技有限公司 | A kind of cochrome powder and preparation method thereof |
| CN109692969A (en) * | 2019-03-04 | 2019-04-30 | 江苏萌达新材料科技有限公司 | A kind of preparation method of hypoxemia superfine spherical cobalt powder |
| CN109702217A (en) * | 2019-03-04 | 2019-05-03 | 江苏萌达新材料科技有限公司 | A kind of iron cobalt-copper alloy powder and preparation method thereof |
| CN111570784A (en) * | 2020-04-27 | 2020-08-25 | 江苏萌达新材料科技有限公司 | Preparation method of iron-copper alloy diffusion powder |
| CN111570819A (en) * | 2020-04-27 | 2020-08-25 | 江苏萌达新材料科技有限公司 | Preparation method of iron-copper-phosphorus alloy diffusion powder |
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