CN107900362B - Novel ball milling method for preparing hard alloy - Google Patents
Novel ball milling method for preparing hard alloy Download PDFInfo
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- CN107900362B CN107900362B CN201711083682.7A CN201711083682A CN107900362B CN 107900362 B CN107900362 B CN 107900362B CN 201711083682 A CN201711083682 A CN 201711083682A CN 107900362 B CN107900362 B CN 107900362B
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- ball milling
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- hard alloy
- tungsten carbide
- cobalt powder
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/005—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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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
- B22F2009/042—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling using a particular milling 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
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
Abstract
The invention discloses a novel ball milling method for preparing hard alloy, which comprises the following steps: step A, filling a cemented carbide ball 675KG into a tilting type ball mill, adding a ball milling liquid, and performing spray drying, molding and sintering to obtain ultra-coarse grain cemented carbide; b, adding tungsten carbide with the Fisher particle size of more than or equal to 12 microns and corresponding cobalt powder into a ball mill, adding ball milling liquid, carrying out wet milling for 18 hours, then adding tungsten carbide with the Fisher particle size of more than or equal to 12 microns and corresponding cobalt powder, adding ball milling liquid, and finally carrying out spray drying, molding and sintering to obtain the hard alloy with the non-uniform structure; and step C, adding the finished materials in the step A and the step B into a tilting type ball mill, adding ball milling liquid, carrying out wet milling for 36 hours in a sliding mode, and carrying out spray drying, molding and sintering to obtain the product. The invention can effectively finish the processing of the hard alloy, reduces the manufacturing energy consumption while ensuring the quality, can ensure the processing effect, and has strong applicability and good practicability.
Description
Technical Field
The invention relates to a novel ball milling method for preparing hard alloy.
Background
The grinding liquid, tungsten carbide powder, cobalt powder and the like are added into a ball mill for wet grinding to prepare a mixture meeting the production requirement of the hard alloy, which is equipment and process technology widely adopted by various manufacturers at present. In the wet milling process, the tungsten carbide powder and the cobalt powder are further ground and finely mixed to be uniform.
The most significant factor that can affect grinding and mixing without variation in the geometry and process parameters of the ball mill is the ball mill speed. It is well known that there is a limit speed for each particular ball mill barrel diameter size. The relationship between the two is expressed by the following formula:
ball mill limit speed QUOTE
By way of example, a 300L ball mill which is currently widely used has a cylinder internal diameter of 0.55m and is substituted into the above formula to obtain the limit rotation speed QUOTE of the apparatus
In practice, the ball milling process can be carried out according to the limit rotating speed multiplied by a percentage (%). Practice proves that: when the percentage (%) takes different values, the operation state of the ball mill is also different, and there are three typical operation modes.
It is clear that one would not choose the material (balls) centrifugation at the limit speed, because the grinding and mixing of the powder is not good. It is natural to choose the falling mode, since in this state the grinding and mixing of the powders is the best. Based on the above, the operating speed of the widely used 300L wet grinder is 57 × 65% =36-38 r/min.
Although the above-described principles of the wet milling process of cemented carbide feedstock powder have long been accepted and applied by the industry, it is actually troublesome that the present invention is directed.
Disclosure of Invention
The invention aims to provide a novel ball milling method for preparing hard alloy.
The technical scheme for realizing the aim of the invention is that the hard alloy is prepared by a novel ball milling mode, comprises a tilting ball mill and conventional tungsten carbide powder, cobalt powder and hard alloy balls with the Fisher particle size of more than or equal to 12 mu m, and comprises the following steps:
step A, filling hard alloy balls 675KG into a tilting type ball mill, simultaneously adding ball milling liquid for the first time, keeping the rotating speed of the tilting type ball mill at 14r/min, carrying out wet milling for 14-16 h, and then carrying out spray drying, molding and sintering to obtain ultra-coarse grain hard alloy;
step B, adding tungsten carbide with the Fisher particle size of more than or equal to 12 microns and corresponding cobalt powder 110KG into a ball mill, simultaneously adding ball milling liquid for the second time, carrying out wet milling for 18h at the rotating speed of 36r/min, then adding tungsten carbide with the Fisher particle size of more than or equal to 12 microns and corresponding cobalt powder 220KG, simultaneously adding ball milling liquid for the third time, carrying out wet milling for 14h at the rotating speed of 14r/min, and finally carrying out spray drying, molding and sintering on wet milling slurry to obtain the hard alloy with the non-uniform structure;
and step C, adding the finished materials in the step A and the step B into a tilting type ball mill, simultaneously adding ball milling liquid for the fourth time, enabling the rotating speed of the ball mill to be 20r/min, carrying out wet milling for 36 hours in a sliding mode, and then carrying out spray drying, forming and sintering to obtain the finished product.
The ball milling liquid is alcohol.
In the step B, the tungsten carbide of 110KG and the tungsten carbide in the corresponding cobalt powder are 91.2KG, and the cobalt powder is 8.8 KG; the tungsten carbide in 220KG tungsten carbide and the corresponding cobalt powder was 182.4KG and the cobalt powder was 17.6 KG.
In step A, the first addition of ball milling liquid is carried out in an amount of 0.11 to 0.12KG based on 1KG of the mixture.
In step B, the second addition of ball milling liquid and the third addition of ball milling liquid were 25KG and 28KG, respectively.
The fourth addition of ball milling liquid was 0.18KG per KG of mix.
The invention has the positive effects that: the invention not only can effectively finish the processing of the hard alloy, but also can effectively reduce the manufacturing energy consumption while ensuring the quality, and simultaneously can ensure the processing effect, and has strong applicability and good practicability.
Detailed Description
(example 1)
A new ball milling method for preparing hard alloy comprises a tilting ball mill and conventional tungsten carbide powder, cobalt powder and hard alloy balls with the Fisher size of more than or equal to 12 mu m, and comprises the following steps:
step A, filling hard alloy balls 675KG into a tilting type ball mill, simultaneously adding ball milling liquid for the first time, keeping the rotating speed of the tilting type ball mill at 14r/min, carrying out wet milling for 14-16 h, and then carrying out spray drying, molding and sintering to obtain ultra-coarse grain hard alloy;
step B, adding tungsten carbide with the Fisher particle size of more than or equal to 12 microns and corresponding cobalt powder 110KG into a ball mill, simultaneously adding ball milling liquid for the second time, carrying out wet milling for 18h at the rotating speed of 36r/min, then adding tungsten carbide with the Fisher particle size of more than or equal to 12 microns and corresponding cobalt powder 220KG, simultaneously adding ball milling liquid for the third time, carrying out wet milling for 14h at the rotating speed of 14r/min, and finally carrying out spray drying, molding and sintering on wet milling slurry to obtain the hard alloy with the non-uniform structure;
and step C, adding the finished materials in the step A and the step B into a tilting type ball mill, simultaneously adding ball milling liquid for the fourth time, enabling the rotating speed of the ball mill to be 20r/min, carrying out wet milling for 36 hours in a sliding mode, and then carrying out spray drying, forming and sintering to obtain the finished product.
The ball milling liquid is alcohol.
In the step B, the tungsten carbide of 110KG and the tungsten carbide in the corresponding cobalt powder are 91.2KG, and the cobalt powder is 8.8 KG; the tungsten carbide in 220KG tungsten carbide and the corresponding cobalt powder was 182.4KG and the cobalt powder was 17.6 KG.
In step A, the first addition of ball milling liquid is carried out in an amount of 0.11 to 0.12KG based on 1KG of the mixture.
In step B, the second addition of ball milling liquid and the third addition of ball milling liquid were 25KG and 28KG, respectively.
The fourth addition of ball milling liquid was 0.18KG per KG of mix.
The invention not only can effectively finish the processing of the hard alloy, but also can effectively reduce the manufacturing energy consumption while ensuring the quality, and simultaneously can ensure the processing effect, and has strong applicability and good practicability.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious changes and modifications which fall within the spirit of the invention are deemed to be covered by the present invention.
Claims (4)
1. A new ball milling method for preparing hard alloy comprises a tilting ball mill and conventional tungsten carbide powder, cobalt powder and hard alloy balls with the Fisher size of more than or equal to 12 mu m, and is characterized in that: the method comprises the following steps:
step A, filling hard alloy balls 675KG into a tilting type ball mill, simultaneously adding ball milling liquid for the first time, keeping the rotating speed of the tilting type ball mill at 14r/min, carrying out wet milling for 14-16 h, and then carrying out spray drying, molding and sintering to obtain ultra-coarse grain hard alloy;
step B, adding tungsten carbide with the Fisher particle size of more than or equal to 12 microns and corresponding cobalt powder 110KG into a ball mill, simultaneously adding ball milling liquid for the second time, carrying out wet milling for 18h at the rotating speed of 36r/min, then adding tungsten carbide with the Fisher particle size of more than or equal to 12 microns and corresponding cobalt powder 220KG, simultaneously adding ball milling liquid for the third time, carrying out wet milling for 14h at the rotating speed of 14r/min, and finally carrying out spray drying, molding and sintering on wet milling slurry to obtain the hard alloy with the non-uniform structure;
step C, adding the finished materials in the step A and the step B into a tilting type ball mill, simultaneously adding ball milling liquid for the fourth time, enabling the rotating speed of the ball mill to be 20r/min, carrying out wet milling for 36 hours in a sliding mode, and then carrying out spray drying, forming and sintering to obtain the finished product; the ball milling liquid is alcohol; in the step B, the tungsten carbide of 110KG and the tungsten carbide in the corresponding cobalt powder are 91.2KG, and the cobalt powder is 8.8 KG; the tungsten carbide in 220KG tungsten carbide and the corresponding cobalt powder was 182.4KG and the cobalt powder was 17.6 KG.
2. The new ball milling method for preparing cemented carbide according to claim 1, characterized in that: in step A, the first addition of ball milling liquid is carried out in an amount of 0.11 to 0.12KG based on 1KG of the mixture.
3. The new ball milling method for preparing cemented carbide according to claim 2, characterized in that: in step B, the second addition of ball milling liquid and the third addition of ball milling liquid were 25KG and 28KG, respectively.
4. The new ball milling process for producing cemented carbide according to claim 2 or claim 3, characterized in that: the fourth addition of ball milling liquid was 0.18KG per KG of mix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083682.7A CN107900362B (en) | 2017-10-25 | 2017-10-25 | Novel ball milling method for preparing hard alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083682.7A CN107900362B (en) | 2017-10-25 | 2017-10-25 | Novel ball milling method for preparing hard alloy |
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| Publication Number | Publication Date |
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| CN107900362A CN107900362A (en) | 2018-04-13 |
| CN107900362B true CN107900362B (en) | 2020-05-01 |
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| CN114045422B (en) * | 2021-11-15 | 2022-09-09 | 株洲硬质合金集团有限公司 | Self-sharpening hard alloy and preparation method thereof |
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| CN102634684B (en) * | 2011-02-10 | 2015-06-24 | 厦门金鹭特种合金有限公司 | Method for preparing ultra-coarse grain cemented carbide by flexible ball milling technology |
| CN102808096B (en) * | 2012-08-13 | 2014-04-30 | 厦门钨业股份有限公司 | Preparation method for super coarse crystal WC-Co hard alloy |
| CN103215467B (en) * | 2013-05-05 | 2015-07-08 | 沈阳中北真空磁电科技有限公司 | Manufacture method of high-performance neodymium iron boron rare-earth permanent magnetic material |
| CN106367651B (en) * | 2016-09-14 | 2017-12-26 | 鑫京瑞钨钢（厦门）有限公司 | A kind of diamondite mixing preparation method for material |
| CN106591670B (en) * | 2016-12-14 | 2019-05-17 | 单麒铭 | A kind of preparation method of road breaking tooth WC-Co hard alloy |
| CN106636837B (en) * | 2017-01-23 | 2018-02-13 | 四川理工学院 | A kind of preparation method of super crude crystal WC Co hard alloy |
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