CN118241069A - Hard alloy for mining tool with tantalum carbide dispersed and distributed and preparation method thereof - Google Patents
Hard alloy for mining tool with tantalum carbide dispersed and distributed and preparation method thereof Download PDFInfo
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- CN118241069A CN118241069A CN202410690029.0A CN202410690029A CN118241069A CN 118241069 A CN118241069 A CN 118241069A CN 202410690029 A CN202410690029 A CN 202410690029A CN 118241069 A CN118241069 A CN 118241069A
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- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910003468 tantalcarbide Inorganic materials 0.000 title claims abstract description 65
- 239000000956 alloy Substances 0.000 title claims abstract description 53
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 53
- 238000005065 mining Methods 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000005245 sintering Methods 0.000 claims abstract description 40
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 20
- 239000008103 glucose Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 20
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910001936 tantalum oxide Inorganic materials 0.000 claims abstract description 19
- 230000001788 irregular Effects 0.000 claims abstract description 13
- 239000006104 solid solution Substances 0.000 claims abstract description 13
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims abstract description 8
- 238000000498 ball milling Methods 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 24
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- 238000009826 distribution Methods 0.000 claims description 13
- 238000005469 granulation Methods 0.000 claims description 12
- 230000003179 granulation Effects 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 12
- 229910052786 argon Inorganic materials 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000012188 paraffin wax Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 229910052715 tantalum Inorganic materials 0.000 claims description 6
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 6
- 229920000548 poly(silane) polymer Polymers 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims 3
- 238000005452 bending Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000004663 powder metallurgy Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000243 solution Substances 0.000 description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
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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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention belongs to the technical field of powder metallurgy, and particularly relates to a hard alloy for a mining tool with tantalum carbide dispersed and distributed and a preparation method thereof, wherein tantalum carbide is generated by adding tantalum oxide and glucose, so that ultrafine tantalum carbide is obtained, and the tantalum carbide is uniformly dispersed, so that the hard alloy with tantalum carbide dispersed and distributed is prepared; the invention fully utilizes the temperature stage of the reaction of the tantalum oxide and the glucose, sets a corresponding temperature interval, and completes the conversion of tantalum carbide in the hard alloy sintering process. The hard alloy for the mining tool with the dispersed and distributed tantalum carbide prepared by the invention does not contain a third phase solid solution with irregular morphology, and the bending strength is more than or equal to 3580MPa.
Description
Technical Field
The invention belongs to the technical field of powder metallurgy, and particularly relates to a hard alloy for a mining tool with tantalum carbide dispersed and distributed and a preparation method thereof.
Background
The hard alloy has the advantages of high hardness, wear resistance, corrosion resistance and the like, is widely applied to the fields of mining tools, die materials, cutting tools, wear-resistant parts and the like, and plays a significant role in promoting national industrial manufacturing and national economic development. However, the mining tool has a complex and changeable use environment, and strict requirements are put on the comprehensive performance of the hard alloy, so that the mining tool has good hardness, toughness and impact resistance. In the traditional hard alloy for the mining tool, the service life of the hard alloy can be prolonged by adding tantalum carbide, but the tantalum carbide is difficult to break and disperse in the ball milling process due to large granularity and high hardness, so that a large amount of irregular third phase solid solution exists in a hard alloy structure, the strength of the hard alloy is reduced to a certain extent, and the service life of the mining tool is reduced.
Disclosure of Invention
In order to solve the problems in the prior art, the main purpose of the invention is to provide a hard alloy for a mining tool with tantalum carbide dispersed and distributed and a preparation method thereof.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
A preparation method of hard alloy for mining tools with tantalum carbide dispersed and distributed comprises the following steps:
s1, WC and Co are taken, and are added with tantalum oxide and glucose, and spray granulation is carried out after ball milling to obtain a mixture;
S2, pressing and forming the mixture to obtain a pressed compact, placing the pressed compact into a sintering furnace for hot-pressing sintering, and cooling along with the furnace after sintering to obtain the hard alloy for the mining tool with tantalum carbide dispersed and distributed.
As a preferable scheme of the preparation method of the hard alloy for the mining tool with tantalum carbide dispersed and distributed, the invention comprises the following steps: in the step S1, the mass ratio of WC to Co is (85-98): (2-15).
As a preferable scheme of the preparation method of the hard alloy for the mining tool with tantalum carbide dispersed and distributed, the invention comprises the following steps: in the step S1, the addition amount of the tantalum oxide is 4.20-5.50% of the total mass of WC and Co.
As a preferable scheme of the preparation method of the hard alloy for the mining tool with tantalum carbide dispersed and distributed, the invention comprises the following steps: in the step S1, the addition amount of glucose is 80-85% of the mass of the tantalum polysilane.
As a preferable scheme of the preparation method of the hard alloy for the mining tool with tantalum carbide dispersed and distributed, the invention comprises the following steps: in the step S1, the ball milling medium is absolute ethyl alcohol, and paraffin accounting for 1.5-3% of the total mass of WC and Co is added during ball milling; the ball milling time is 2-10 h, and the ball-material ratio is (2-8): 1.
As a preferable scheme of the preparation method of the hard alloy for the mining tool with tantalum carbide dispersed and distributed, the invention comprises the following steps: in the step S1, the spray granulation temperature is 160-180 ℃.
As a preferable scheme of the preparation method of the hard alloy for the mining tool with tantalum carbide dispersed and distributed, the invention comprises the following steps: in the step S2, the sintering process is as follows:
Heating to 250-280 ℃ at 10 ℃/min under the hydrogen atmosphere, and preserving heat for 30-60 min;
Heating to 1150-1200 ℃ at 10 ℃/min under vacuum condition, and preserving heat for 120-180 min;
heating to 1380-1420 ℃ at a speed of 5 ℃/min under a vacuum condition, and preserving heat for 60-120 min;
Argon is introduced, the pressure in the furnace is controlled to be 8-10 MPa, the sintering temperature is 1450-1500 ℃, and the temperature is kept for 180-240 min.
In order to solve the above technical problems, according to another aspect of the present invention, the following technical solutions are provided:
the hard alloy for the mining tool with the tantalum carbide dispersed distribution is prepared by adopting the preparation method of the hard alloy for the mining tool with the tantalum carbide dispersed distribution.
As a preferable scheme of the hard alloy for the mining tool with tantalum carbide dispersed and distributed, the invention comprises the following steps: the hard alloy for the mining tool with the tantalum carbide in dispersed distribution does not contain a third phase solid solution with irregular morphology, and the bending strength is more than or equal to 3580MPa.
The beneficial effects of the invention are as follows:
The invention provides a hard alloy for a mining tool with tantalum carbide dispersed and distributed and a preparation method thereof, wherein tantalum carbide is generated by adding tantalum oxide and glucose, so that superfine tantalum carbide is obtained, and the tantalum carbide is uniformly dispersed, so that the hard alloy with tantalum carbide dispersed and distributed is prepared; the invention fully utilizes the temperature stage of the reaction of the tantalum oxide and the glucose, sets a corresponding temperature interval, and completes the conversion of tantalum carbide in the hard alloy sintering process. The hard alloy for the mining tool with the dispersed and distributed tantalum carbide prepared by the invention does not contain a third phase solid solution with irregular morphology, and the bending strength is more than or equal to 3580MPa.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a photograph of cemented carbide prepared in example 1 of the present invention.
Fig. 2 is a photograph of the cemented carbide prepared in comparative example 1 of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description will be made clearly and fully with reference to the technical solutions in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to one aspect of the invention, the invention provides the following technical scheme:
A preparation method of hard alloy for mining tools with tantalum carbide dispersed and distributed comprises the following steps:
s1, WC and Co are taken, and are added with tantalum oxide and glucose, and spray granulation is carried out after ball milling to obtain a mixture;
S2, pressing and forming the mixture to obtain a pressed compact, placing the pressed compact into a sintering furnace for hot-pressing sintering, and cooling along with the furnace after sintering to obtain the hard alloy for the mining tool with tantalum carbide dispersed and distributed.
Preferably, in the step S1, the mass ratio of WC to Co is (85-98): (2-15).
Preferably, in the step S1, the adding amount of the tantalum oxide is 4.20-5.50% of the total mass of WC and Co.
Preferably, in the step S1, the glucose addition amount is 80-85% of the mass of the tantalum polysilane.
Preferably, in the step S1, the ball milling medium is absolute ethanol, and paraffin accounting for 1.5-3% of the total mass of WC and Co is added during ball milling; the ball milling time is 2-10 h, and the ball-material ratio is (2-8): 1.
Preferably, in the step S1, the spray granulation temperature is 160 to 180 ℃.
Preferably, in the step S2, the sintering process is as follows:
Heating to 250-280 ℃ at 10 ℃/min under the hydrogen atmosphere, and preserving heat for 30-60 min;
Heating to 1150-1200 ℃ at 10 ℃/min under vacuum condition, and preserving heat for 120-180 min;
heating to 1380-1420 ℃ at a speed of 5 ℃/min under a vacuum condition, and preserving heat for 60-120 min;
Argon is introduced, the pressure in the furnace is controlled to be 8-10 MPa, the sintering temperature is 1450-1500 ℃, and the temperature is kept for 180-240 min.
The invention fully utilizes the temperature stage of the reaction of the tantalum oxide and the glucose, sets a corresponding temperature interval, and completes the conversion of tantalum carbide in the hard alloy sintering process.
According to another aspect of the invention, the invention provides the following technical scheme:
The hard alloy for the mining tool with the tantalum carbide dispersed distribution is prepared by the preparation method of the hard alloy for the mining tool with the tantalum carbide dispersed distribution, and the hard alloy for the mining tool with the tantalum carbide dispersed distribution does not contain a third phase solid solution with irregular morphology, and has bending strength of more than or equal to 3580MPa.
The technical scheme of the invention is further described below by combining specific embodiments.
Example 1
A preparation method of hard alloy for mining tools with tantalum carbide dispersed and distributed comprises the following steps:
s1, WC and Co are taken, and are added with tantalum oxide and glucose, and spray granulation is carried out after ball milling to obtain a mixture; the mass ratio of WC to Co is 90:10; the addition amount of the tantalum oxide is 5% of the total mass of WC and Co; the glucose addition amount is 80% of the mass of the tantalum silicane; the ball milling medium is absolute ethyl alcohol, and paraffin accounting for 2% of the total mass of WC and Co is added during ball milling; ball milling time is 5h, and ball-material ratio is 6:1; the spray granulation temperature was 170 ℃.
S2, pressing and forming the mixture to obtain a pressed compact, and placing the pressed compact in a sintering furnace for hot-pressing sintering, wherein the sintering process comprises the following steps: heating to 265 ℃ at 10 ℃/min under the hydrogen atmosphere, and preserving heat for 45min; heating to 1170 ℃ at 10 ℃/min under vacuum, and preserving heat for 150min; heating to 1400 ℃ at 5 ℃/min under vacuum condition, and preserving heat for 90min; argon is introduced, the pressure in the furnace is controlled to be 9MPa, the sintering temperature is 1470 ℃, and the temperature is kept for 210min; and cooling along with the furnace after sintering to obtain the hard alloy for the mining tool with tantalum carbide in dispersed distribution.
The photograph of the hard alloy A1 prepared in the embodiment is shown in fig. 1, and the third phase solid solution with irregular morphology is not found under the magnification of 1500 times under a metallographic microscope, and the bending strength is 3632MPa.
Example 2
A preparation method of hard alloy for mining tools with tantalum carbide dispersed and distributed comprises the following steps:
S1, WC and Co are taken, and are added with tantalum oxide and glucose, and spray granulation is carried out after ball milling to obtain a mixture; the mass ratio of WC to Co is 85:15; the addition amount of the tantalum oxide is 5.25% of the total mass of WC and Co; the glucose addition amount is 80% of the mass of the tantalum silicane; the ball milling medium is absolute ethyl alcohol, and paraffin accounting for 3% of the total mass of WC and Co is added during ball milling; ball milling time is 10h, and ball-material ratio is 2:1; the spray granulation temperature was 180 ℃.
S2, pressing and forming the mixture to obtain a pressed compact, and placing the pressed compact in a sintering furnace for hot-pressing sintering, wherein the sintering process comprises the following steps: heating to 280 ℃ at 10 ℃/min under the hydrogen atmosphere, and preserving heat for 30min; heating to 1150 ℃ at 10 ℃/min under vacuum condition, and preserving heat for 180min; heating to 1420 ℃ at 5 ℃/min under vacuum condition, and preserving heat for 60min; argon is introduced, the pressure in the furnace is controlled to be 8MPa, the sintering temperature is 1500 ℃, and the temperature is kept for 180min; and cooling along with the furnace after sintering to obtain the hard alloy for the mining tool with tantalum carbide in dispersed distribution.
The hard alloy A2 prepared in the embodiment is amplified by 1500 times under a metallographic microscope, and no third phase solid solution with irregular morphology is found, and the bending strength is 3586MPa.
Example 3
A preparation method of hard alloy for mining tools with tantalum carbide dispersed and distributed comprises the following steps:
S1, WC and Co are taken, and are added with tantalum oxide and glucose, and spray granulation is carried out after ball milling to obtain a mixture; the mass ratio of WC to Co is 98:2; the addition amount of the tantalum oxide is 4.2 percent of the total mass of WC and Co; the glucose addition amount is 83% of the mass of the tantalum silicane; the ball milling medium is absolute ethyl alcohol, and paraffin accounting for 2% of the total mass of WC and Co is added during ball milling; ball milling time is 2h, and ball-material ratio is 8:1; the spray granulation temperature was 160 ℃.
S2, pressing and forming the mixture to obtain a pressed compact, and placing the pressed compact in a sintering furnace for hot-pressing sintering, wherein the sintering process comprises the following steps: heating to 250 ℃ at 10 ℃/min under the hydrogen atmosphere, and preserving heat for 60min; heating to 1200 ℃ at 10 ℃/min under vacuum condition, and preserving heat for 120min; heating to 1380 ℃ at 5 ℃/min under vacuum condition, and preserving heat for 120min; argon is introduced, the pressure in the furnace is controlled to be 8MPa, the sintering temperature is 1450 ℃, and the temperature is kept for 240min; and cooling along with the furnace after sintering to obtain the hard alloy for the mining tool with tantalum carbide in dispersed distribution.
The hard alloy A3 prepared in the embodiment is amplified by 1500 times under a metallographic microscope, and no third phase solid solution with irregular morphology is found, and the bending strength is 3706MPa.
Comparative example 1
The difference from example 1 is that step S1 takes WC, co and tantalum carbide; the mass ratio of WC to Co is 90:10; the addition amount of tantalum carbide is 2.2% of the total mass of WC and Co; the ball milling medium is absolute ethyl alcohol, and paraffin accounting for 2% of the total mass of WC and Co is added during ball milling; ball milling time is 5h, and ball-material ratio is 6:1.
The photograph of the cemented carbide B1 obtained in this comparative example is shown in FIG. 2, and a large amount of irregular form third phase solid solution was observed under a metallographic microscope at a magnification of 1500 times, and the flexural strength was 3155MPa.
Comparative example 2
The difference from example 1 is that glucose is not added in step S1.
The cemented carbide B2 obtained in this comparative example had decarburization, and a large amount of irregular form third phase solid solution was observed under a metallographic microscope at 1500 times magnification, and the flexural strength was 3082MPa.
Comparative example 3
The difference from example 1 is that the sintering process in step S3 is: heating to 1170 ℃ at 10 ℃/min under vacuum, and preserving heat for 150min; heating to 1400 ℃ at 5 ℃/min under vacuum condition, and preserving heat for 90min; argon is introduced, the pressure in the furnace is controlled to be 9MPa, the sintering temperature is 1470 ℃, and the temperature is kept for 210min.
The cemented carbide B3 obtained in this comparative example had numerous cracks and failed to undergo other tests.
Comparative example 4
The difference from example 1 is that the sintering process in step S3 is: heating to 265 ℃ at 10 ℃/min under the hydrogen atmosphere, and preserving heat for 45min; heating to 1400 ℃ at 5 ℃/min under vacuum condition, and preserving heat for 90min; argon is introduced, the pressure in the furnace is controlled to be 9MPa, the sintering temperature is 1470 ℃, and the temperature is kept for 210min.
The cemented carbide B4 obtained in this comparative example exhibited a large number of voids, and a large number of irregular morphology third phase solid solutions were observed under a metallographic microscope at a magnification of 1500 times, and the flexural strength was 2359MPa.
Comparative example 5
The difference from example 1 is that the sintering process in step S3 is: heating to 265 ℃ at 10 ℃/min under the hydrogen atmosphere, and preserving heat for 45min; heating to 1170 ℃ at 10 ℃/min under vacuum, and preserving heat for 150min; argon is introduced, the pressure in the furnace is controlled to be 9MPa, the sintering temperature is 1470 ℃, and the temperature is kept for 210min.
The cemented carbide B5 obtained in this comparative example showed a small amount of voids and free carbon, and had a flexural strength of 2453MPa.
Samples A1, A2, A3, B1, B2, B4, B5 prepared in examples 1-3, comparative examples 1-2, 4-5 were mounted on a 813A tunneling trolley for tunneling experiments, 12 samples were mounted for each experiment, 45 holes were drilled consecutively, and each hole was tested 4.8 meters deep. The test results were as follows:
as can be seen from the above examples and comparative examples, the present invention produces tantalum carbide by adding a tantalum oxide and a glucose site, the superfine tantalum carbide is obtained, and the tantalum carbide is uniformly dispersed, so that the cemented carbide with the dispersed and distributed tantalum carbide is prepared; the invention fully utilizes the temperature stage of the reaction of the tantalum oxide and the glucose, sets a corresponding temperature interval, and completes the conversion of tantalum carbide in the hard alloy sintering process. The hard alloy for the mining tool with the dispersed and distributed tantalum carbide prepared by the invention does not contain a third phase solid solution with irregular morphology, and the bending strength is more than or equal to 3580MPa.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the content of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (9)
1. The preparation method of the hard alloy for the mining tool with the tantalum carbide dispersed and distributed is characterized by comprising the following steps of:
s1, WC and Co are taken, and are added with tantalum oxide and glucose, and spray granulation is carried out after ball milling to obtain a mixture;
S2, pressing and forming the mixture to obtain a pressed compact, placing the pressed compact into a sintering furnace for hot-pressing sintering, and cooling along with the furnace after sintering to obtain the hard alloy for the mining tool with tantalum carbide dispersed and distributed.
2. The method for preparing the cemented carbide for the mining tool with the tantalum carbide dispersed and distributed according to claim 1, wherein in the step S1, the mass ratio of WC to Co is (85-98): (2-15).
3. The method for preparing the cemented carbide for the mining tool with the tantalum carbide dispersed and distributed according to claim 1, wherein in the step S1, the addition amount of the tantalum oxide is 4.20-5.50% of the total mass of WC and Co.
4. The method for preparing the hard alloy for the mining tool with the tantalum carbide dispersed and distributed according to claim 1, wherein in the step S1, the glucose addition amount is 80-85% of the mass of the tantalum polysilane.
5. The method for preparing the hard alloy for the mining tool with the tantalum carbide dispersed and distributed according to claim 1, wherein in the step S1, a ball milling medium is absolute ethyl alcohol, and paraffin accounting for 1.5-3% of the total mass of WC and Co is added during ball milling; the ball milling time is 2-10 h, and the ball-material ratio is (2-8): 1.
6. The method for preparing a cemented carbide for a mining tool with a tantalum carbide dispersion distribution according to claim 1, wherein in the step S1, the spray granulation temperature is 160-180 ℃.
7. The method for preparing cemented carbide for mining tools with dispersed tantalum carbide according to claim 1, wherein in the step S2, the sintering process is as follows:
Heating to 250-280 ℃ at 10 ℃/min under the hydrogen atmosphere, and preserving heat for 30-60 min;
Heating to 1150-1200 ℃ at 10 ℃/min under vacuum condition, and preserving heat for 120-180 min;
heating to 1380-1420 ℃ at a speed of 5 ℃/min under a vacuum condition, and preserving heat for 60-120 min;
Argon is introduced, the pressure in the furnace is controlled to be 8-10 MPa, the sintering temperature is 1450-1500 ℃, and the temperature is kept for 180-240 min.
8. The cemented carbide for mining tools with tantalum carbide dispersed distribution, which is characterized in that the cemented carbide for mining tools with tantalum carbide dispersed distribution is prepared by the preparation method of the cemented carbide for mining tools with tantalum carbide dispersed distribution as set forth in any one of claims 1-7.
9. The tantalum carbide dispersion mining hard alloy according to claim 8, wherein the tantalum carbide dispersion mining hard alloy contains no irregular form third phase solid solution, and the flexural strength is not less than 3580MPa.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1161315A (en) * | 1997-08-26 | 1999-03-05 | Toshiba Tungaloy Co Ltd | Wc-containing cemented carbide reinforced by dispersion in grain and its production |
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