CN111826569A - Wear-resistant high-hardness hard alloy drilling tool and preparation method thereof - Google Patents
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- 238000005553 drilling Methods 0.000 title claims abstract description 30
- 239000000956 alloy Substances 0.000 title claims abstract description 27
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 48
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 238000005245 sintering Methods 0.000 claims description 17
- 238000000227 grinding Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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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
- C22C29/02—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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
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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
- C22C29/02—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
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
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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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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Abstract
The invention discloses a wear-resistant high-hardness hard alloy drilling tool and a preparation method thereof, wherein the drilling tool is composed of the following raw materials in parts by weight: 40-60 parts of WC powder, 10-20 parts of Co powder, 1-2 parts of TaC and Cr3C23-5 parts of powder, 9-14 parts of aluminum powder, 6-10 parts of steel powder and 2-4 parts of manganese powder, wherein the average Fisher particle size of the WC powder is 0.5-0.6 mu m, and the average Fisher particle size of the Co powder is 0.6-1.0 mu m. The invention effectively improves the integral hardness and has higher wear resistance.
Description
Technical Field
The invention belongs to the technical field of hard alloy, and particularly relates to a wear-resistant high-hardness hard alloy drilling tool and a preparation method thereof.
Background
Drilling tools are the most widely used tools in industrial production, and are mainly used for drilling holes in workpieces, for example, as drill bits for electric drills, or for drilling holes in coal mining and oil mining processes, for example, deep well drilling tools, oil drilling tools, and the like. Among them, the cemented carbide drill is widely used due to its excellent performance, it can not only adapt to the drilling of various complicated materials, but also match with higher cutting speed, and the cemented carbide drill also has better wear resistance.
However, with the development of modern industry, people put higher demands on the performance of the cemented carbide drilling tool, and the traditional cemented carbide drilling tool at present is difficult to meet the requirements of higher hardness and wear resistance.
Disclosure of Invention
The invention aims to provide a wear-resistant high-hardness hard alloy drilling tool and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
a wear-resistant high-hardness hard alloy drilling tool is composed of the following raw materials in parts by weight:
40-60 parts of WC powder, 10-20 parts of Co powder, 1-2 parts of TaC and Cr3C23-5 parts of powder, 9-14 parts of aluminum powder, 6-10 parts of steel powder and 2-4 parts of manganese powder.
The average Fisher size of the WC powder is 0.5-0.6 μm.
The average Fisher particle size of the Co powder is 0.6-1.0 um.
And the WC is selected from superfine crystal grain WC powder with an HCP value of (36-38) KA/m.
A preparation method of a wear-resistant high-hardness hard alloy drilling tool comprises the following steps:
taking WC powder, Co powder, TaC and Cr3C2Mixing aluminum powder, steel powder and manganese powder, placing the mixture into a grinding machine for grinding, wherein the ball-milling medium is a hard alloy sphere and absolute ethyl alcohol, and grinding to form a mixture;
filtering the mixture, drying, and performing spray granulation;
then compression molding is carried out, a finished product is obtained after sintering, and the finished product is cooled and taken out.
The sintering adopts a three-stage mode,
in the first stage, heating to 350-550 ℃, and preserving heat for 1-3 hours;
in the second stage, heating to 1150-1350 ℃ and preserving heat for 0.5-1 hour;
the third stage, heating to 1400 ℃ and 1500 ℃, and keeping the temperature for 2-3 hours.
When the temperature is raised to the third stage, Ar gas is also introduced.
The hard alloy product obtained by the invention has greatly improved structural stability and hardness, and improved wear resistance and bending strength.
Drawings
FIG. 1 is a metallographic representation of a product of the invention.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example one
A preparation method of a wear-resistant high-hardness hard alloy drilling tool comprises the following steps:
taking 40 parts of WC powder, 10 parts of Co powder, 1 part of TaC and Cr3C23 parts of powder, 9 parts of aluminum powder, 6 parts of steel powder and 2 parts of manganese powder are mixed and put into a grinding machine for grinding, the ball-milling medium is a hard alloy sphere and absolute ethyl alcohol, and a mixture is formed after grinding. Wherein the average Fisher size of the WC powder is 0.5 μm. The average Fisher size of the Co powder is 0.6 um. By using Cr3C2The powder can prevent crystal grains from growing to avoid the reduction of the final hardness of the super-wear-resistant high-hardness hard alloy drilling tool material. T isThe main function of aC is to make the metallographic structure more uniform during the cemented carbide sintering process, as shown in fig. 1.
And filtering the ground slurry by a screen to remove the absolute ethyl alcohol on the upper layer of the slurry.
Drying, and performing spray granulation to obtain powder granule material.
Then compression molding is carried out to prepare the hard alloy blank.
And sintering to obtain a finished product, and cooling and taking out.
The sintering adopts a three-stage mode, and in the first stage, the temperature is increased to 350 ℃ and is kept for 1 hour; in the second stage, the temperature is increased to 1150 ℃ and the temperature is kept for 0.5 hour; in the third stage, the temperature is raised to 1400 ℃ and the temperature is kept for 2 hours. When the temperature is raised to the third stage, Ar gas is also introduced. Through multistage sintering, the sample can still keep smaller grain size after sintering. The hardness of the obtained hard alloy drilling tool product is HRA 92.5, and the bending strength is 2500N/mm2。
Example two
A preparation method of a wear-resistant high-hardness hard alloy drilling tool comprises the following steps:
taking 50 parts of WC powder, 10 parts of Co powder, 1.5 parts of TaC and Cr3C24 parts of powder, 11 parts of aluminum powder, 8 parts of steel powder and 3 parts of manganese powder are mixed and put into a grinding machine for grinding, the ball-milling medium is a hard alloy sphere and absolute ethyl alcohol, and a mixture is formed after grinding. Wherein the average Fisher size of the WC powder is 0.55 μm. The average Fisher size of the Co powder is 0.8 um.
And filtering the ground slurry by a screen to remove the absolute ethyl alcohol on the upper layer of the slurry.
Drying, and performing spray granulation to obtain powder granule material.
Then compression molding is carried out to prepare the hard alloy blank.
And sintering to obtain a finished product, and cooling and taking out.
The sintering adopts a three-stage mode, and in the first stage, the temperature is increased to 450 ℃ and is kept for 2 hours; in the second stage, the temperature is increased to 1150 ℃ and the temperature is kept for 0.8 hour; in the third stage, the temperature is raised to 1400 ℃ and the temperature is kept for 2.5 hours. When the temperature is raised to the third stage,ar gas is also introduced. Through multistage sintering, the sample can still keep smaller grain size after sintering. The hardness of the obtained hard alloy drilling tool product is HRA 93.5, and the bending strength is 2600N/mm2。
EXAMPLE III
A preparation method of a wear-resistant high-hardness hard alloy drilling tool comprises the following steps:
60 portions of WC powder, 20 portions of Co powder, 2 portions of TaC and Cr3C25 parts of powder, 14 parts of aluminum powder, 10 parts of steel powder and 4 parts of manganese powder are mixed and put into a grinding machine for grinding, the ball-milling medium is a hard alloy sphere and absolute ethyl alcohol, and a mixture is formed after grinding. Wherein the average Fisher size of the WC powder is 0.6 μm. The average Fisher size of the Co powder is 1.0 um.
And filtering the ground slurry by a screen to remove the absolute ethyl alcohol on the upper layer of the slurry.
Drying, and performing spray granulation to obtain powder granule material.
Then compression molding is carried out to prepare the hard alloy blank.
And sintering to obtain a finished product, and cooling and taking out.
The sintering adopts a three-stage mode, and in the first stage, the temperature is increased to 550 ℃ and is kept for 3 hours; in the second stage, the temperature is raised to 1350 ℃ and kept for 1 hour; in the third stage, the temperature is raised to 1500 ℃ and the temperature is kept for 3 hours. When the temperature is raised to the third stage, Ar gas is also introduced. Through multistage sintering, the sample can still keep smaller grain size after sintering. The hardness of the obtained hard alloy drilling tool product is HRA 94.5, and the bending strength is 2700N/mm2。
Although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements, and the like can be made in the technical solutions of the foregoing embodiments or in some of the technical features of the foregoing embodiments, but those modifications, equivalents, improvements, and the like are all within the spirit and principle of the present invention.
Claims (7)
1. The wear-resistant high-hardness hard alloy drilling tool is characterized by comprising the following raw materials in parts by weight:
40-60 parts of WC powder, 10-20 parts of Co powder, 1-2 parts of TaC and Cr3C23-5 parts of powder, 9-14 parts of aluminum powder, 6-10 parts of steel powder and 2-4 parts of manganese powder.
2. The wear-resistant high-hardness cemented carbide drilling tool according to claim 1, wherein the average fisher's grain size of the WC powder is 0.5-0.6 μ ι η.
3. The wear-resistant high-hardness cemented carbide drilling tool according to claim 2, wherein the average Fisher's particle size of the Co powder is 0.6-1.0 um.
4. The wear-resistant high-hardness cemented carbide drilling tool according to claim 3, wherein the WC is selected from ultra-fine grain WC powder with a HCP value of (36-38) KA/m.
5. A method for preparing a wear resistant high hardness cemented carbide drilling tool according to any one of claims 1-4, characterized by the steps of:
taking WC powder, Co powder, TaC and Cr3C2Mixing aluminum powder, steel powder and manganese powder, placing the mixture into a grinding machine for grinding, wherein the ball-milling medium is a hard alloy sphere and absolute ethyl alcohol, and grinding to form a mixture;
filtering the mixture, drying, and performing spray granulation;
then compression molding is carried out, a finished product is obtained after sintering, and the finished product is cooled and taken out.
6. The method for preparing a wear-resistant hard alloy drilling tool with high hardness according to claim 5, wherein the sintering is performed in a three-stage manner,
in the first stage, heating to 350-550 ℃, and preserving heat for 1-3 hours;
in the second stage, heating to 1150-1350 ℃ and preserving heat for 0.5-1 hour;
the third stage, heating to 1400 ℃ and 1500 ℃, and keeping the temperature for 2-3 hours.
7. The method for preparing a wear-resistant hard alloy drilling tool according to claim 6, wherein Ar gas is further introduced when the temperature is raised to the third stage.
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| CN202010702126.9A CN111826569A (en) | 2020-07-21 | 2020-07-21 | Wear-resistant high-hardness hard alloy drilling tool and preparation method thereof |
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Application publication date: 20201027 |