CN109825732B - Preparation method of multi-scale and multi-level interface cemented carbide materials - Google Patents
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- 239000000463 material Substances 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 98
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000956 alloy Substances 0.000 claims abstract description 37
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 27
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 27
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000011812 mixed powder Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000005238 degreasing Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims description 29
- 238000010304 firing Methods 0.000 claims description 27
- 239000002131 composite material Substances 0.000 claims description 26
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 12
- 238000000498 ball milling Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 239000003292 glue Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000013078 crystal Substances 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007709 nanocrystallization Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
本发明公开了一种多尺度多层次界面硬质合金材料的制备方法，先冲击处理碳化钨粉，与二氧化锆晶须混合，然后加球化剂搅拌粒化，脱脂后再与钴粉混合，最后将混合粉置于液压快热装置中烧制成型，最终得到多尺度多层次界面硬质合金材料。此方法具有成分控制精度高，工艺稳定性和重复性较强，可实现硬质合金材料的强韧化和长寿命。The invention discloses a preparation method of a multi-scale and multi-level interface hard alloy material. First, tungsten carbide powder is impact-treated, mixed with zirconium dioxide whiskers, then a nodularizing agent is added to stir and granulate, and then it is mixed with cobalt powder after degreasing. , and finally the mixed powder is fired in a hydraulic fast heating device, and finally a multi-scale and multi-level interface cemented carbide material is obtained. This method has the advantages of high composition control precision, strong process stability and repeatability, and can achieve toughening and long life of cemented carbide materials.
Description
Technical Field
The invention relates to the technical field of hard alloy preparation, in particular to a preparation method of a multi-scale multi-level interface hard alloy material.
Background
The problem of the "inverse ratio" of the strength to the toughness of cemented carbide materials is one of the most important factors limiting their development. The conventional methods of adding grain inhibitors, changing ultrafine raw materials, pretreating powders, etc. have limited effects. Therefore, a new method is found, the contradiction between the performance strength and the toughness of the hard alloy is balanced, and the improvement of the processing performance is very important.
Disclosure of Invention
The invention provides a preparation method of a multi-scale multi-level interface hard alloy material, aiming at the current situation of the research and development field that the strength and toughness of hard alloy are difficult to effectively coordinate by common means. The method has the advantages of high component control precision, strong process stability and repeatability, and capability of realizing the strengthening and toughening of the hard alloy material and long service life.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a multi-scale multi-level interface hard alloy material comprises the following steps:
1) carrying out high-impulse variable-frequency impact treatment on the tungsten carbide powder, and then mixing the tungsten carbide powder with zirconium dioxide whiskers to obtain whisker-coated tungsten carbide composite powder;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, degreasing, and mixing the degreased nodulized powder with cobalt powder to obtain mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming to finally obtain the multi-scale multi-layer interface hard alloy material.
As a further improvement of the invention, in the step 1), a double-shaft overturning ball milling device is adopted for high-impulse frequency-conversion impact treatment, the rotating speed of a main shaft of the device is 350-470 r/min, the overturning time interval is 3-5 minutes, and the overturning speed is 40-70 r/min.
As a further improvement of the invention, in the step 1), the mass percentage of the tungsten carbide powder and the zirconium dioxide whisker is (99.88-99.95): (0.05 to 0.12); the mixing equipment is a low-speed mixer, and the rotating speed is 30-60 rpm.
As a further improvement of the invention, in the step 2), the nodulizer is a polyvinyl alcohol aqueous solution, and the mass percentage of the composite powder to the nodulizer is (86.6-94.6): (5.4-13.4).
As a further improvement of the invention, in the step 2), the degreasing temperature is 450 ℃, and the mass ratio of the degreased spheroidized powder to the cobalt powder is (87.5-92.4): (7.6-12.5).
As a further improvement of the invention, in the step 3), the firing forming pressure is 27-38 MPa, the temperature is 1340-1450 ℃, and the temperature is kept for 20-40 minutes.
As a further improvement of the invention, the prepared hard alloy material has a multi-scale and multi-level interface structure, and the impact toughness of the material is more than or equal to 22.5 MPa.m1/2The microhardness is more than or equal to 8.3GPa, the bending strength is more than or equal to 1840MPa, and the compressive strength at 1000 ℃ is more than or equal to 4580 MPa.
Compared with the prior art, the invention has the following characteristics and advantages:
firstly, impact treating tungsten carbide powder, mixing with zirconium dioxide crystal whisker, then adding a nodulizer, stirring, granulating, degreasing, mixing with cobalt powder, and finally placing the mixed powder in a hydraulic quick heating device for firing and forming; the zirconium dioxide whiskers and the tungsten carbide powder are mixed and uniformly attached to the surfaces of tungsten carbide particles, the directions of the whiskers are different, and the tungsten carbide crystal grain interfaces can be pinned in the forming process, so that I-level interfaces and II-level interfaces are formed, and the toughness of the hard alloy is improved. After spheroidizing, the mixture is mixed with cobalt powder to form a net microstructure, so that the strength and toughness of the hard alloy are effectively coordinated. The hard alloy material prepared by the invention has a multi-scale and multi-level interface structure, and the impact toughness of the material is more than or equal to 22.5 MPa.m1/2The microhardness is more than or equal to 8.3GPa, the bending strength is more than or equal to 1840MPa, and the high-temperature (1000 ℃) compressive strength is more than or equal to 4580 MPa.
Furthermore, through multi-scale interface design and optimization of powder nanocrystallization and firing process, the strength of the superhard phase and the toughness advantage of the interface layer are fully exerted, and the method is a key means for coordinating the strength and toughness of the hard alloy. In the process of preparing the hard alloy material, in order to solve the problem that the existing methods of adding a crystal grain inhibitor, changing a superfine raw material, pretreating powder and the like are difficult to effectively break brittleness, the invention adopts a multi-scale interface design, powder nanocrystallization and firing process optimization, and researches the relationship among variable frequency impact parameters, a spheroidizing process, a sintering process, the toughness of the hard alloy and high-temperature mechanical properties, namely: for the multi-scale multi-level interface hard alloy material, the optimal variable frequency impact parameters, spheroidization process and sintering process with higher obdurability and high-temperature mechanical property are kept. The method has the advantages of high component control precision, strong process stability and repeatability, and capability of realizing the strengthening and toughening of the hard alloy material and long service life.
Detailed Description
The invention relates to a preparation method of a multi-scale multi-level interface hard alloy material, which comprises the following steps:
1) carrying out high-impulse frequency conversion impact treatment on tungsten carbide powder by adopting double-shaft turnover ball-milling equipment, wherein the rotating speed of a main shaft is 350-470 r/min, the turnover time interval is 3-5 minutes, the turnover speed is 40-70 r/min, then mixing the tungsten carbide powder with zirconium dioxide whiskers, and the mass percentage of the tungsten carbide powder to the zirconium dioxide whiskers is (99.88-99.95): (0.05-0.12), mixing equipment is a low-speed mixer, and the rotating speed is 30-60 rpm, so that the whisker-coated tungsten carbide composite powder is obtained;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is (86.6-94.6): (5.4-13.4), mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidizing powder to cobalt powder is (87.5-92.4): (7.6-12.5) to obtain mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 27-38 MPa, the temperature is 1340-1450 ℃, and the temperature is kept for 20-40 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
The toughness and high temperature properties of the gold cemented carbide materials prepared in the following examples are shown in table 1.
Example 1
1) Adopting double-shaft overturning ball-milling equipment to carry out high-impulse frequency conversion impact treatment on tungsten carbide powder, wherein the rotating speed of a main shaft is 350 r/m, the overturning time interval is 3 minutes, the overturning speed is 40 r/m, and then the tungsten carbide powder is mixed with zirconium dioxide whiskers, and the mass percentage of the tungsten carbide powder to the zirconium dioxide whiskers is 99.88: 0.12, mixing equipment is a low-speed mixer, and the rotating speed is 30 revolutions per minute to obtain whisker-coated tungsten carbide composite powder;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 86.6: 13.4, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidized powder to cobalt powder is 87.5: 12.4, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 28MPa, the temperature is 1340 ℃, and the temperature is kept for 30 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
Example 2
1) Adopting biax upset ball-milling equipment to carry out high impulse frequency conversion impact treatment to tungsten carbide powder, main shaft rotational speed 360 revolutions per minute, the upset time interval is 3 minutes, and upset speed 45 revolutions per minute, then mix with the zirconium dioxide whisker, the mass percent of tungsten carbide powder and zirconium dioxide whisker is 99.90: 0.10, mixing equipment is a low-speed mixer, and the rotating speed is 40 revolutions per minute, so that the whisker-coated tungsten carbide composite powder is obtained;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 87: 13, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidizing powder to cobalt powder is 88: 12, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 29MPa, the temperature is 1350 ℃, and the temperature is kept for 30 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
Example 3
1) Adopting biax upset ball-milling equipment to carry out high impulse frequency conversion impact treatment to tungsten carbide powder, main shaft rotational speed 370 commentaries on classics/minute, the upset time interval is 3 minutes, and upset speed 50 commentaries on classics/minute, then mix with the zirconium dioxide whisker, the mass percent of tungsten carbide powder and zirconium dioxide whisker is 99.91: 0.09, the mixing equipment is a low-speed mixer, and the rotating speed is 40 r/min, so as to obtain the whisker-coated tungsten carbide composite powder;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 88.2: 11.8, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidized powder to cobalt powder is 88.4: 11.6, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 30MPa, the temperature is 1380 ℃, and the temperature is kept for 30 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
Example 4
1) Adopting double-shaft overturning ball-milling equipment to carry out high-impulse frequency-conversion impact treatment on tungsten carbide powder, wherein the rotating speed of a main shaft is 410 rpm, the overturning time interval is 3 minutes, the overturning speed is 55 rpm, and then the tungsten carbide powder is mixed with zirconium dioxide whiskers, and the mass percentage of the tungsten carbide powder to the zirconium dioxide whiskers is 99.92: 0.08, mixing equipment is a low-speed mixer, and the rotating speed is 50 revolutions per minute, so that the whisker-coated tungsten carbide composite powder is obtained;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 89: 11, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidized powder to cobalt powder is 92.4: 7.6, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 33MPa, the temperature is 1430 ℃, and the heat is preserved for 30 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
The performance parameters of the cemented carbide materials prepared in examples 1-4 are shown in table 1:
TABLE 1
As can be seen from the above table, the hard alloy material prepared by the invention has a multi-scale and multi-level interface structure, and the impact toughness of the material is more than or equal to 22.5 MPa.m1/2The microhardness is more than or equal to 8.3GPa, the bending strength is more than or equal to 1840MPa, and the high-temperature (1000 ℃) compressive strength is more than or equal to 4580 MPa.
Example 5
1) Adopting double-shaft overturning ball-milling equipment to carry out high-impulse frequency conversion impact treatment on tungsten carbide powder, wherein the rotating speed of a main shaft is 430 rpm, the overturning time interval is 3 minutes, the overturning speed is 60 rpm, and then the tungsten carbide powder is mixed with zirconium dioxide whiskers, and the mass percentage of the tungsten carbide powder to the zirconium dioxide whiskers is 99.95: 0.05, mixing equipment is a low-speed mixer, and the rotating speed is 55 revolutions per minute, so that the whisker-coated tungsten carbide composite powder is obtained;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 94.1: and 5.9, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidized powder to cobalt powder is 87.5: 12.5, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 34MPa, the temperature is 1450 ℃, and the temperature is kept for 20 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
Example 6
1) Adopting double-shaft overturning ball-milling equipment to carry out high-impulse frequency conversion impact treatment on tungsten carbide powder, wherein the rotating speed of a main shaft is 470 r/min, the overturning time interval is 3 minutes, the overturning speed is 70 r/min, and then the tungsten carbide powder is mixed with zirconium dioxide whiskers, and the mass percentage of the tungsten carbide powder to the zirconium dioxide whiskers is 99.93: 0.07, mixing equipment is a low-speed mixer, and the rotating speed is 60 revolutions per minute, so as to obtain whisker-coated tungsten carbide composite powder;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 94.1: and 5.9, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidized powder to cobalt powder is 87.6: 12.4, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 38MPa, the temperature is 1450 ℃, and the temperature is kept for 40 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
Example 7
1) Adopting biax upset ball-milling equipment to carry out high impulse frequency conversion impact treatment to tungsten carbide powder, main shaft rotational speed 460 turns/minute, and the upset time interval is 5 minutes, and upset speed 56 turns/minute, then mixes with the zirconium dioxide whisker, and the mass percent of tungsten carbide powder and zirconium dioxide whisker is 99.89: 0.11, mixing equipment is a low-speed mixer, and the rotating speed is 60 revolutions per minute, so that the whisker-coated tungsten carbide composite powder is obtained;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 89: and 11, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidized powder to cobalt powder is 89: 11, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 34MPa, the temperature is 1410 ℃, and the temperature is kept for 30 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
Example 8
1) Adopting biax upset ball-milling equipment to carry out high impulse frequency conversion impact treatment to tungsten carbide powder, main shaft rotational speed 400 turns/minute, and the upset time interval is 4 minutes, and upset speed 40 turns/minute, then mix with the zirconium dioxide whisker, the mass percent of tungsten carbide powder and zirconium dioxide whisker is 99.95: 0.05, mixing equipment is a low-speed mixer, and the rotating speed is 50 revolutions per minute, so that the whisker-coated tungsten carbide composite powder is obtained;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 94.6: and 5.4, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidized powder to cobalt powder is 87.9: 12.1, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 38MPa, the temperature is 1450 ℃, and the temperature is kept for 30 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
Example 9
1) Adopting biax upset ball-milling equipment to carry out high impulse frequency conversion impact treatment to tungsten carbide powder, main shaft rotational speed 420 turns/minute, and the upset time interval is 4 minutes, and upset speed 60 turns/minute, then mixes with the zirconium dioxide whisker, and the mass percent of tungsten carbide powder and zirconium dioxide whisker is 99.90: 0.10, mixing equipment is a low-speed mixer, and the rotating speed is 40 revolutions per minute, so that the whisker-coated tungsten carbide composite powder is obtained;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, wherein the nodulizer is a 30mol/L polyvinyl alcohol aqueous solution, and the mass ratio of powder to glue is 92: 8, mixing the degreased powder with cobalt powder, wherein the degreasing temperature is 450 ℃, and the mass ratio of spheroidizing powder to cobalt powder is 90: 10, obtaining mixed powder;
3) and placing the mixed powder in a hydraulic quick heating device for firing and forming, wherein the firing and forming pressure is 30MPa, the temperature is 1400 ℃, and the heat preservation is carried out for 25 minutes, so that the multi-scale multi-layer interface hard alloy material is finally obtained.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (4)
1. A preparation method of a multi-scale multi-level interface hard alloy material is characterized by comprising the following steps:
1) carrying out high-impulse variable-frequency impact treatment on the tungsten carbide powder, and then mixing the tungsten carbide powder with zirconium dioxide whiskers to obtain whisker-coated tungsten carbide composite powder;
2) adding a nodulizer into the whisker-coated tungsten carbide composite powder, stirring and granulating, degreasing, and mixing the degreased nodulized powder with cobalt powder to obtain mixed powder;
3) placing the mixed powder in a hydraulic quick heating device for firing and forming to finally obtain the multi-scale multi-layer interface hard alloy material;
in the step 1), double-shaft overturning ball milling equipment is adopted for high-impulse frequency-conversion impact treatment, the rotating speed of a main shaft of the equipment is 350-470 r/min, the overturning time interval is 3-5 min, and the overturning speed is 40-70 r/min;
in the step 1), the mass percentage of the tungsten carbide powder to the zirconium dioxide whisker is (99.88-99.95): (0.05 to 0.12); the mixing equipment is a low-speed mixer, and the rotating speed is 30-60 rpm;
in the step 3), the firing forming pressure is 27-38 MPa, the temperature is 1340-1450 ℃, and the temperature is kept for 20-40 minutes.
2. The preparation method of the multi-scale multi-level interface hard alloy material according to claim 1, wherein in the step 2), the nodulizer is a polyvinyl alcohol aqueous solution, and the mass percentages of the composite powder and the nodulizer are (86.6-94.6): (5.4-13.4).
3. The method for preparing the multi-scale multi-level interface hard alloy material according to claim 1, wherein in the step 2), the degreasing temperature is 450 ℃, and the mass ratio of the degreased spheroidized powder to the cobalt powder is (87.5-92.4): (7.6-12.5).
4. The method for preparing the multi-scale and multi-level interface hard alloy material according to any one of claims 1 to 3, wherein the prepared hard alloy material has a multi-scale and multi-level interface structure, and the impact toughness of the material is more than or equal to 22.5 MPa-m1/2The microhardness is more than or equal to 8.3GPa, the bending strength is more than or equal to 1840MPa, and the compressive strength at 1000 ℃ is more than or equal to 4580 MPa.
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| DE3842420A1 (en) * | 1988-12-16 | 1990-06-21 | Krupp Widia Gmbh | Hard cemented composite and process for the production thereof |
| DD295106A5 (en) * | 1990-06-14 | 1991-10-24 | Krupp Widia Gmbh,De | HARD METAL COMPOSITE BODY AND METHOD FOR THE PRODUCTION THEREOF |
| CN106903319A (en) * | 2017-02-20 | 2017-06-30 | 歌尔股份有限公司 | A kind of Multi-layer spherical material and preparation method thereof |
| CN107523710A (en) * | 2017-08-24 | 2017-12-29 | 台州学院 | A kind of whisker modified Ti (C, N) based composite metal ceramic preparation of resistance to high temperature oxidation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3842420A1 (en) * | 1988-12-16 | 1990-06-21 | Krupp Widia Gmbh | Hard cemented composite and process for the production thereof |
| DD295106A5 (en) * | 1990-06-14 | 1991-10-24 | Krupp Widia Gmbh,De | HARD METAL COMPOSITE BODY AND METHOD FOR THE PRODUCTION THEREOF |
| CN106903319A (en) * | 2017-02-20 | 2017-06-30 | 歌尔股份有限公司 | A kind of Multi-layer spherical material and preparation method thereof |
| CN107523710A (en) * | 2017-08-24 | 2017-12-29 | 台州学院 | A kind of whisker modified Ti (C, N) based composite metal ceramic preparation of resistance to high temperature oxidation |
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