CN111961939A - Preparation method of hard alloy material - Google Patents
Preparation method of hard alloy material Download PDFInfo
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- CN111961939A CN111961939A CN202010825983.8A CN202010825983A CN111961939A CN 111961939 A CN111961939 A CN 111961939A CN 202010825983 A CN202010825983 A CN 202010825983A CN 111961939 A CN111961939 A CN 111961939A
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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
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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
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Abstract
The invention provides a preparation method of a hard alloy material. The preparation method of the hard alloy material comprises the following steps: s1, selecting raw materials, and respectively cleaning 70-80% of tungsten carbide, 7-15% of cobalt powder, 5-7% of nickel powder, 2-3% of molybdenum powder, 2-3% of titanium carbide, 1-2% of titanium nitride and 2-4% of chromium carbide according to the total weight percentage to remove surface impurities; s2, crushing the raw materials, mixing the raw materials in the step S1 with a grinding medium, putting the mixture into a wet grinder for grinding, and filtering and drying the slurry to obtain mixed powder; s3, pressing and forming, selecting a proper mould, putting the mixed powder in the S2 into the mould, continuously extruding the mixed powder by an extruding device to prepare the hard alloy material, and then demoulding. The preparation method of the hard alloy material provided by the invention has the effects of relatively simple raw material preparation, process and equipment and low manufacturing cost, and the prepared hard alloy material has the advantages of high relative density, high hardness, good wear resistance and the like.
Description
Technical Field
The invention relates to the field of hard alloy materials, in particular to a preparation method of a hard alloy material.
Background
Cemented carbide is an alloy material formed by high-temperature sintering of high-hardness refractory metal carbide powder (WC, TiC, etc.) as a main phase and transition metal cobalt (Co), nickel (Ni), molybdenum (Mo), iron (Fe), etc. as a binder phase. The hard alloy is mostly prepared by a metal powder metallurgy process and a high-temperature liquid phase sintering method. Cemented carbide has many excellent properties such as high strength, high hardness, and high toughness, and is widely used in the fields of cutting, drilling, mining, tool forming, and wear-resistant parts. Compared with high-speed steel, the hard alloy has better red hardness, and when the temperature exceeds 600 ℃, the hardness is higher than that of the high-speed steel at room temperature; when the temperature exceeds 1000 ℃, the hardness is still higher than that of normal temperature carbon steel.
The hard alloy has many excellent mechanical properties, including very high hardness and good wear resistance, especially keeps higher hardness and strength at high temperature, compared with other superhard tool materials, the tungsten-drilling type hard alloy (WC-C) has better tensile strength and fracture toughness, based on the excellent properties, the hard alloy used as the tool material can improve the service life of the tool by times or even hundreds of times, improve the cutting speed and the drilling speed and greatly improve the production efficiency, but the impact resistance and the toughness of the existing hard alloy are not high enough; the green compact strength is not high enough; the performance of the alloy material is not stable enough.
Therefore, it is necessary to provide a method for preparing a cemented carbide material to solve the above technical problems.
Disclosure of Invention
The invention provides a preparation method of a hard alloy material, which solves the problem that the impact resistance and the toughness are not high enough.
In order to solve the technical problems, the preparation method of the hard alloy material provided by the invention comprises the following steps:
s1, selecting raw materials, and respectively cleaning 70-80% of tungsten carbide, 7-15% of cobalt powder, 5-7% of nickel powder, 2-3% of molybdenum powder, 2-3% of titanium carbide, 1-2% of titanium nitride and 2-4% of chromium carbide according to the total weight percentage to remove surface impurities;
s2, crushing the raw materials, mixing the raw materials in the step S1 with a grinding medium, putting the mixture into a wet grinder for grinding, and filtering and drying the slurry to obtain mixed powder;
s3, pressing and forming, namely selecting a proper mould, putting the mixed powder in the S2 into the mould, continuously extruding the mixed powder by an extruding device to prepare a hard alloy material, and then demoulding;
s4, sintering, namely putting the hard alloy material demoulded in the S3 into sintering equipment for sintering;
and S5, packaging and warehousing, wherein the sintered hard alloy material in the S4 is subjected to finished product inspection through a detection device, qualified hard alloy materials are packaged and warehoused, repairable waste products are burned, and unrepairable waste products are subjected to metal recovery.
Preferably, the S1 comprises 70% of tungsten carbide, 12% of cobalt powder, 7% of nickel powder, 3% of molybdenum powder, 3% of titanium carbide, 2% of titanium nitride and 3% of chromium carbide.
Preferably, the grinding medium in S2 is ethanol with the concentration of more than or equal to 98%.
Preferably, the drying temperature in the S2 is 80-95 ℃, and the drying time is 5-7 h.
Preferably, the stirring speed of the wet mill in the S2 is 500-850 rpm, and the grinding time is 7-10 h.
Preferably, the filtering screen in the S2 adopts 250-350 meshes.
Preferably, the extrusion molding in S3 is carried out in a protective atmosphere, and the extrusion molding is carried out to obtain a green body under the pressure of 500-700 MPa.
Preferably, the sintering in S4 adopts presintering and vacuum liquid phase sintering.
Preferably, the pre-sintering vacuum degree is 10-20Pa, the sintering temperature is 400-650 ℃, and the heat preservation treatment is carried out for 2-4 h.
Preferably, the vacuum liquid phase sintering vacuum degree is 1-5Pa, the sintering temperature is 1350-1500 ℃, and the heat preservation treatment is carried out for 1-2.5 h.
Compared with the related technology, the preparation method of the hard alloy material provided by the invention has the following beneficial effects:
the invention provides a method for preparing hard alloy material, which comprises the steps of selecting 70-80% of tungsten carbide, 7-15% of cobalt powder, 5-7% of nickel powder, 2-3% of molybdenum powder, 2-3% of titanium carbide, 1-2% of titanium nitride and 2-4% of chromium carbide according to the total weight percentage, respectively cleaning and removing surface impurities; mixing the cleaned raw materials with a grinding medium, putting the mixture into a wet grinder for grinding, and filtering and drying slurry to obtain mixed powder; then selecting a proper mold, putting the mixed powder into the mold, continuously extruding the mixed powder by an extruding device to prepare a hard alloy material, and then demolding the hard alloy material; putting the demolded hard alloy material into sintering equipment for sintering; the sintered hard alloy material is subjected to finished product inspection through a detection device, qualified hard alloy material is packaged and warehoused, repairable waste is burned back, unrepairable waste is subjected to metal recovery, raw material preparation, process and equipment are relatively simple, the manufacturing cost is low, and the prepared hard alloy material has the advantages of high relative density, high hardness, good wear resistance and the like.
Drawings
FIG. 1 is a schematic diagram illustrating steps of a method for preparing a cemented carbide material according to the present invention;
FIG. 2 is a schematic structural diagram of a detection apparatus provided in the present invention;
FIG. 3 is a top view of the rotatable disk shown in FIG. 2;
fig. 4 is a schematic view of the internal structure of the sleeve shown in fig. 2.
Reference numbers in the figures: 1. the device comprises a bottom plate, 2, a supporting plate, 3, a top plate, 4, a hydraulic rod, 5, a sliding plate, 6, a hardness detection device, 7, a supporting frame, 8, a sleeve, 9, a sliding block, 10, a telescopic spring, 11, a moving rod, 12, a rotating disc, 13, a placing groove, 14, a groove, 15, a worm wheel, 16, a rotating motor, 17, a worm, 18 and a cushion block.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1, fig. 2, fig. 3, and fig. 4, wherein fig. 1 is a schematic step diagram of a method for preparing a cemented carbide material according to the present invention; FIG. 2 is a schematic structural diagram of a detection apparatus provided in the present invention; FIG. 3 is a top view of the rotatable disk shown in FIG. 2; fig. 4 is a schematic view of the internal structure of the sleeve shown in fig. 2. The preparation method of the hard alloy material comprises the following steps:
s1, selecting raw materials, and respectively cleaning 70-80% of tungsten carbide, 7-15% of cobalt powder, 5-7% of nickel powder, 2-3% of molybdenum powder, 2-3% of titanium carbide, 1-2% of titanium nitride and 2-4% of chromium carbide according to the total weight percentage to remove surface impurities;
s2, crushing the raw materials, mixing the raw materials in the step S1 with a grinding medium, putting the mixture into a wet grinder for grinding, and filtering and drying the slurry to obtain mixed powder;
s3, pressing and forming, namely selecting a proper mould, putting the mixed powder in the S2 into the mould, continuously extruding the mixed powder by an extruding device to prepare a hard alloy material, and then demoulding;
s4, sintering, namely putting the hard alloy material demoulded in the S3 into sintering equipment for sintering;
and S5, packaging and warehousing, wherein the sintered hard alloy material in the S4 is subjected to finished product inspection through a detection device, qualified hard alloy materials are packaged and warehoused, repairable waste products are burned, and unrepairable waste products are subjected to metal recovery.
70% of tungsten carbide, 12% of cobalt powder, 7% of nickel powder, 3% of molybdenum powder, 3% of titanium carbide, 2% of titanium nitride and 3% of chromium carbide in the S1.
The grinding medium in the S2 is ethanol with the concentration of more than or equal to 98 percent.
The drying temperature in the S2 is 80-95 ℃, and the drying time is 5-7 h.
And in the S2, the stirring speed of a wet mill is 500-850 rpm, and the grinding time is 7-10 h.
The filtering screen in the S2 adopts 250-350 meshes.
The extrusion molding in S3 is carried out in a protective atmosphere and is pressed into a green body under the pressure of 500-700 MPa.
And in the S4, pre-sintering and vacuum liquid phase sintering are adopted.
The pre-sintering vacuum degree is 10-20Pa, the sintering temperature is 400-650 ℃, and the heat preservation treatment is carried out for 2-4 h.
The vacuum liquid phase sintering vacuum degree is 1-5Pa, the sintering temperature is 1350-.
The detection device in the S5 comprises a bottom plate 1, wherein supporting plates 2 are fixedly connected to two sides of the top of the bottom plate 1, a top plate 3 is fixedly connected between the tops of the two supporting plates 2, hydraulic rods 4 are fixedly connected to two sides of the bottom of the top plate 3, a sliding plate 5 is fixedly connected between the bottom ends of the two hydraulic rods 4, two sides of the sliding plate 5 are respectively connected to one opposite sides of the two supporting plates 2 in a sliding manner, and a hardness detection device 6 is fixedly connected to the bottom of the sliding plate 5;
by starting the hydraulic rod 4, the hydraulic rod 4 extends to drive the sliding plate 5 to move downwards, and the sliding plate 5 moves downwards to drive the hardness detection device 6 to move downwards so as to detect the hard alloy material.
The top fixedly connected with support frame 7 of bottom plate 1, the top of bottom plate 1 is rotated and is connected with sleeve 8, the inside sliding connection of sleeve 8 has sliding block 9, sliding block 9 the bottom with be provided with expanding spring 10 between the bottom of 8 inner walls of sleeve, the top fixedly connected with carriage release lever 11 of sliding block 9, the top of carriage release lever 11 is run through support frame 7 and extend to the top of support frame 7, the top fixedly connected with rolling disc 12 of carriage release lever 11, the top fixedly connected with standing groove 13 of rolling disc 12.
Standing groove 13 is used for placing carbide material, and when hydraulic stem 4 downwardly extending drove hardness detection device 6 and examine time measuring downwards, continue downstream after conflicting carbide material, oppression standing groove 13 makes standing groove 13 downstream afterwards, and standing groove 13 drives rolling disc 12 and moves downwards to conflict gradually and stop behind the cushion 18, detect through the support of cushion 18.
The number of the placing grooves 13 is four, the placing grooves 13 are U-shaped, and grooves 14 are formed in two sides of each placing groove 13.
The outer surface of the sleeve 8 is fixedly connected with a worm wheel 15, the top of the bottom plate 1 is positioned on the right side of the sleeve 8 and is fixedly connected with a rotating motor 16, and an output shaft of the rotating motor 16 is fixedly connected with a worm 17.
The rotating motor 16 is connected with an external power supply through a control switch, the rotating motor 16 is a stepping motor, and the rotation angle is 45 degrees each time;
starting through rotating electrical machines 16, rotating electrical machines 16 is rotatory to drive worm 17 rotatory, worm 17 is rotatory to drive worm wheel 15 rotatory, worm wheel 15 is rotatory to drive sleeve 8 rotatory, and then make carriage release lever 11 rotatory, carriage release lever 11 is rotatory to drive rolling disc 12 rotatory, and then make four standing groove 13 at top do circular motion, rotating electrical machines 16 will make four standing groove 13 rotate in turn to the bottom of hardness detection device 6 at every turn 45, thereby detect one by one, detect the carbide material after finishing, can take off through the manual work and put new carbide material again, detect in turn again, can realize uninterrupted inspection, and improve the work efficiency.
The top fixedly connected with cushion 18 of support frame 7, cushion 18 are located the front of carriage lever 11, and are located the bottom of standing groove 13 on rolling disc 12, and setting up of cushion 18 can support when examining, can support the bottom of rolling disc 12 for hardness-detecting device 6 is when carrying out the application of force to carbide material, and the rolling disc 12 atress is even, can not incline to one side atress.
The working principle of the preparation method of the hard alloy material provided by the invention is as follows:
selecting 70-80% of tungsten carbide, 7-15% of cobalt powder, 5-7% of nickel powder, 2-3% of molybdenum powder, 2-3% of titanium carbide, 1-2% of titanium nitride and 2-4% of chromium carbide according to the total weight percentage, respectively cleaning, and removing surface impurities; mixing the cleaned raw materials with a grinding medium, putting the mixture into a wet grinder for grinding, and filtering and drying slurry to obtain mixed powder;
then selecting a proper mold, putting the mixed powder into the mold, continuously extruding the mixed powder by an extruding device to prepare a hard alloy material, and then demolding the hard alloy material; putting the demolded hard alloy material into sintering equipment for sintering; and (3) inspecting finished products of the sintered hard alloy material by a detection device, packaging qualified hard alloy material into a warehouse, burning repairable waste products, and recovering metals from the non-repairable waste products.
Compared with the related technology, the preparation method of the hard alloy material provided by the invention has the following beneficial effects:
selecting 70-80% of tungsten carbide, 7-15% of cobalt powder, 5-7% of nickel powder, 2-3% of molybdenum powder, 2-3% of titanium carbide, 1-2% of titanium nitride and 2-4% of chromium carbide according to the total weight percentage, respectively cleaning, and removing surface impurities; mixing the cleaned raw materials with a grinding medium, putting the mixture into a wet grinder for grinding, and filtering and drying slurry to obtain mixed powder; then selecting a proper mold, putting the mixed powder into the mold, continuously extruding the mixed powder by an extruding device to prepare a hard alloy material, and then demolding the hard alloy material; putting the demolded hard alloy material into sintering equipment for sintering; the sintered hard alloy material is subjected to finished product inspection through a detection device, qualified hard alloy material is packaged and warehoused, repairable waste is burned back, unrepairable waste is subjected to metal recovery, raw material preparation, process and equipment are relatively simple, the manufacturing cost is low, and the prepared hard alloy material has the advantages of high relative density, high hardness, good wear resistance and the like.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The preparation method of the hard alloy material is characterized by comprising the following steps of:
s1, selecting raw materials, and respectively cleaning 70-80% of tungsten carbide, 7-15% of cobalt powder, 5-7% of nickel powder, 2-3% of molybdenum powder, 2-3% of titanium carbide, 1-2% of titanium nitride and 2-4% of chromium carbide according to the total weight percentage to remove surface impurities;
s2, crushing the raw materials, mixing the raw materials in the step S1 with a grinding medium, putting the mixture into a wet grinder for grinding, and filtering and drying the slurry to obtain mixed powder;
s3, pressing and forming, namely selecting a proper mould, putting the mixed powder in the S2 into the mould, continuously extruding the mixed powder by an extruding device to prepare a hard alloy material, and then demoulding;
s4, sintering, namely putting the hard alloy material demoulded in the S3 into sintering equipment for sintering;
and S5, packaging and warehousing, wherein the sintered hard alloy material in the S4 is subjected to finished product inspection through a detection device, qualified hard alloy materials are packaged and warehoused, repairable waste products are burned, and unrepairable waste products are subjected to metal recovery.
2. The method for preparing the hard alloy material according to claim 1, wherein the S1 comprises 70% of tungsten carbide, 12% of cobalt powder, 7% of nickel powder, 3% of molybdenum powder, 3% of titanium carbide, 2% of titanium nitride and 3% of chromium carbide.
3. The method for preparing the hard alloy material according to claim 1, wherein the grinding medium in S2 is ethanol with a concentration of 98% or more.
4. The method for preparing a cemented carbide material according to claim 1, wherein the drying temperature in S2 is 80-95 ℃ and the drying time is 5-7 h.
5. The preparation method of the hard alloy material according to claim 1, wherein the stirring speed of a wet mill in S2 is 500-850 rpm, and the grinding time is 7-10 h.
6. The method for preparing the hard alloy material as claimed in claim 1, wherein the filtering screen in the S2 is 250-350 mesh.
7. The method for preparing a cemented carbide material as claimed in claim 1, wherein the extrusion molding in S3 is performed in a protective atmosphere and the green compact is obtained by extrusion molding under a pressure of 500-700 MPa.
8. The method for preparing a cemented carbide material according to claim 1, wherein the sintering in S4 is performed by presintering and vacuum liquid phase sintering.
9. The method for preparing the hard alloy material according to claim 8, wherein the pre-sintering vacuum degree is 10-20Pa, the sintering temperature is 400-650 ℃, and the heat preservation treatment is carried out for 2-4 h.
10. The method for preparing a hard alloy material according to claim 8, wherein the vacuum liquid phase sintering is performed for 1-2.5h under the vacuum degree of 1-5Pa and the sintering temperature of 1350-1500 ℃.
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| CN202010825983.8A CN111961939A (en) | 2020-08-17 | 2020-08-17 | Preparation method of hard alloy material |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10298700A (en) * | 1997-04-25 | 1998-11-10 | Sumitomo Electric Ind Ltd | Cemented carbide |
| WO2016107843A1 (en) * | 2014-12-30 | 2016-07-07 | Sandvik Intellectual Property Ab | Light weight cemented carbide for flow erosion components |
| CN106086570A (en) * | 2016-06-16 | 2016-11-09 | 岭南师范学院 | A kind of hard alloy material and the method preparing sintered carbide tool material thereof |
| JP2019042830A (en) * | 2017-08-30 | 2019-03-22 | 三菱マテリアル株式会社 | Composite sintered body cutting tool |
| CN109735756A (en) * | 2019-01-29 | 2019-05-10 | 广汉鸿达硬质合金有限责任公司 | A kind of high abrasion ball body of valve titanium alloy material |
| CN111235451A (en) * | 2020-03-03 | 2020-06-05 | 岭南师范学院 | Hard alloy with pyramid-shaped surface and preparation method thereof |
| CN111378857A (en) * | 2018-12-28 | 2020-07-07 | 自贡硬质合金有限责任公司 | Preparation method of high-performance ultrafine-grained hard alloy |
| CN111455250A (en) * | 2020-04-26 | 2020-07-28 | 株洲精特硬质合金有限公司 | Hard alloy material for crushing iron ore and preparation method thereof |
-
2020
- 2020-08-17 CN CN202010825983.8A patent/CN111961939A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10298700A (en) * | 1997-04-25 | 1998-11-10 | Sumitomo Electric Ind Ltd | Cemented carbide |
| WO2016107843A1 (en) * | 2014-12-30 | 2016-07-07 | Sandvik Intellectual Property Ab | Light weight cemented carbide for flow erosion components |
| CN106086570A (en) * | 2016-06-16 | 2016-11-09 | 岭南师范学院 | A kind of hard alloy material and the method preparing sintered carbide tool material thereof |
| JP2019042830A (en) * | 2017-08-30 | 2019-03-22 | 三菱マテリアル株式会社 | Composite sintered body cutting tool |
| CN111378857A (en) * | 2018-12-28 | 2020-07-07 | 自贡硬质合金有限责任公司 | Preparation method of high-performance ultrafine-grained hard alloy |
| CN109735756A (en) * | 2019-01-29 | 2019-05-10 | 广汉鸿达硬质合金有限责任公司 | A kind of high abrasion ball body of valve titanium alloy material |
| CN111235451A (en) * | 2020-03-03 | 2020-06-05 | 岭南师范学院 | Hard alloy with pyramid-shaped surface and preparation method thereof |
| CN111455250A (en) * | 2020-04-26 | 2020-07-28 | 株洲精特硬质合金有限公司 | Hard alloy material for crushing iron ore and preparation method thereof |
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Application publication date: 20201120 |