CN115572878A - Hard alloy material and preparation method and application thereof - Google Patents
Hard alloy material and preparation method and application thereof Download PDFInfo
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- CN115572878A CN115572878A CN202211208106.1A CN202211208106A CN115572878A CN 115572878 A CN115572878 A CN 115572878A CN 202211208106 A CN202211208106 A CN 202211208106A CN 115572878 A CN115572878 A CN 115572878A
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- 239000000956 alloy Substances 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 21
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 19
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 150000003624 transition metals Chemical class 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 claims description 13
- 229910052580 B4C Inorganic materials 0.000 claims description 12
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical group B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 12
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 12
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 11
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 11
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 claims description 10
- 229910003470 tongbaite Inorganic materials 0.000 claims description 10
- 229910026551 ZrC Inorganic materials 0.000 claims description 8
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 150000001247 metal acetylides Chemical class 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
- -1 transition metal carbides Chemical class 0.000 claims 1
- 239000013078 crystal Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005728 strengthening Methods 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 238000005242 forging Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 12
- 238000005245 sintering Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910000521 B alloy Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001513 hot isostatic pressing Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- SXSVTGQIXJXKJR-UHFFFAOYSA-N [Mg].[Ti] Chemical compound [Mg].[Ti] SXSVTGQIXJXKJR-UHFFFAOYSA-N 0.000 description 1
- CAVCGVPGBKGDTG-UHFFFAOYSA-N alumanylidynemethyl(alumanylidynemethylalumanylidenemethylidene)alumane Chemical compound [Al]#C[Al]=C=[Al]C#[Al] CAVCGVPGBKGDTG-UHFFFAOYSA-N 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- FZQBLSFKFKIKJI-UHFFFAOYSA-N boron copper Chemical compound [B].[Cu] FZQBLSFKFKIKJI-UHFFFAOYSA-N 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- JPNWDVUTVSTKMV-UHFFFAOYSA-N cobalt tungsten Chemical compound [Co].[W] JPNWDVUTVSTKMV-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical group [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 description 1
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910003468 tantalcarbide Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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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- 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 discloses a hard alloy material and a preparation method and application thereof. The hard alloy comprises transition metal carbide and nonmetal carbide, wherein the mass ratio of the transition metal carbide to the nonmetal carbide is 1:4-9. The hard alloy fully exerts the strengthening effect of carbide crystals based on the synergistic effect of all components in the raw materials, and obviously improves the strength and toughness of the alloy material while greatly improving the hardness of the alloy material. The hard alloy adopts an integrated high-temperature high-pressure forging process, and simultaneously, the material is pressurized at high temperature, so that the crystal lattice orientation of the original carbide is changed, and the alloy material presents a fine crystal phase. The hard alloy has excellent hardness, red hardness, wear resistance and obdurability, and can meet the material requirements of various cutting tools and the requirements of parts in high-temperature environments.
Description
Technical Field
The invention relates to an alloy material, in particular to a hard alloy material and a preparation method and application thereof, belonging to the technical field of alloy materials.
Background
In the hard alloy manufacturing industry of China, two common modes are provided, one mode is formed by mixing, pressing and sintering more than 2 metals with the same property, such as tungsten-cobalt alloy, iron-nickel alloy, copper-zinc alloy and the like; the other is made of more than 2 materials with different properties, such as a mixture of nonmetal and metal, and the other is made by pressing and sintering, and the representative alloy is silicon-iron alloy, silicon-aluminum alloy, palladium-boron alloy, copper-boron alloy, iron-carbon alloy and the like. However, no matter what materials, preparation technology and sintering process are, a three-step preparation method of mixing, pressing and sintering is adopted, and the process flow is a mature and practical preparation method in the industry. The process comprises the steps of mixing raw materials according to a certain proportion, press forming, and placing in a furnace with protective atmosphere for high-temperature sintering, wherein protective gas pressure below 6MPa is attached in the furnace during sintering. In addition, hot isostatic pressing has been developed in recent years, and the pressure applied to the alloy by hot isostatic pressing during sintering is 20MPa or less.
From the above description, it can be seen that the properties of the cemented carbide are closely related to the raw material component ratios and the preparation process, the cemented carbide not only requires high hardness and good wear resistance, but also requires the alloy to have certain impact toughness and bending toughness, however, in the field of alloys, hardness and strength, hardness and toughness are two contradictory characteristic attributes, generally speaking, the alloy with higher hardness has reduced strength and toughness, and this characteristic obviously fails to meet the requirements of the existing industry for the properties of the alloy.
Chinese patent (CN 104831144) provides a composite hard alloy material, which takes nano titanium carbide, nano titanium nitride, tungsten carbide, niobium carbide, silicon carbide, yttrium oxide, aluminum carbide, titanium powder, tantalum carbide, zirconium carbide, cobalt powder, silicon powder, nickel powder and boron carbide as main raw materials, and is combined with impurities such as oxygen, sulfur and the like in the alloy by adding rare earth elements, so that the purposes of purifying grain boundaries and eliminating defects are achieved, and the prepared alloy has the characteristics of high strength, good toughness, wear resistance and good thermal shock performance. However, the hard alloy has the disadvantages of various raw materials, high requirements for the raw materials, existence of nano-grade raw materials, insufficient strength and toughness and the like.
In summary, in the prior art, it is still impossible to achieve great improvement of the strength and toughness of the material while ensuring high hardness of the cemented carbide, and the demands for high quality cemented carbide in various industrial production fields need to be met urgently.
Disclosure of Invention
In view of the problems of the prior art, a first object of the present invention is to provide a cemented carbide material. The alloy material takes transition metal carbide and non-metal carbide as raw materials, fully exerts the strengthening effect of carbide crystals based on the synergistic effect of all components in the raw materials, and obviously increases the strength and toughness of the alloy material while greatly improving the hardness of the alloy material.
The second purpose of the invention is to provide a preparation method of the hard alloy material, which obtains the ultrahigh pressure effective working pressure required by the preparation by means of electric heating and pressing by a press, and simultaneously pressurizes the material at high temperature to change the crystal lattice orientation of the original carbide and make the alloy material present a fine crystal phase. The method can realize controllable adjustment of the hardness, strength and toughness of the alloy material by adjusting the current intensity and the pressure intensity.
The hard alloy material provided by the invention has beneficial mechanical properties based on the cooperativity of the raw material components and the preparation method, particularly greatly improves the hardness, red hardness, wear resistance, impact resistance and bending resistance of the alloy material, and meets the material requirements of various cutting tools and parts in a high-temperature environment.
In order to achieve the above technical objects, the present invention provides a cemented carbide material comprising a transition metal carbide and a non-metal carbide; the mass ratio of the transition metal carbide to the non-metal carbide is 1:4 to 9.
The invention adopts transition metal carbide and non-metal carbide, wherein the content of the non-metal carbide is far higher than that of the transition metal carbide, so that the hardness of the alloy is improved, and the density of the alloy is reduced, thereby greatly improving the hardness, strength and toughness of the alloy material. Furthermore, the hard alloy material does not contain oxides and nitrides, and the oxides are easy to cause microcracks in a blank synthesized at high temperature and high pressure, so that the strength and the toughness are reduced; the nitrogen content of the nitride is difficult to control, and the phase change of the hard alloy can exceed a controllable range due to too high nitrogen content, so that the hardness of the hard alloy is reduced.
In a preferred embodiment, the transition metal carbide is at least one of zirconium carbide, chromium carbide, titanium carbide, and vanadium carbide.
In a preferable scheme, the zirconium carbide is cubic polycrystal, the content of combined carbon is between 5 and 10 percent, and the grain diameter is less than 5 mu m.
In a preferable scheme, the chromium carbide is a face-centered cubic lattice, the content of combined carbon is between 4% and 7%, and the grain diameter is less than 5 μm.
As a preferable scheme, the vanadium carbide is a cubic crystal, the combined carbon content is between 5% and 8%, and the particle size is less than 5 microns.
As a preferable scheme, the vanadium carbide is a face-centered cubic lattice, the combined carbon content is between 5% and 8%, and the particle size is less than 5 mu m.
In a preferred embodiment, the non-metallic carbide is boron carbide and/or silicon carbide.
In a preferable scheme, the crystal structure of the silicon carbide is cubic crystal, and can be alpha phase alpha sic or beta phase beta sic, the content of free carbon is between 5% and 10%, and the grain diameter is less than 5 μm.
In a preferable scheme, the crystal structure of the boron carbide is an rhombohedral structure, the content of free carbon is 10-20%, and the particle size is less than 5 μm.
In order to ensure the lattice coordination of the non-metal carbide and the transition metal carbide, the crystals selected by the non-metal carbide and the transition metal carbide are similar or identical, and in the non-metal carbide, the silicon carbide with a cubic structure and the boron carbide with an rhombohedral structure are crystal structures with the highest hardness, so the transition metal carbide selected by the invention adopts cubic crystals. If the crystal selection is not performed according to the requirements, defects are generated in the atomic bonding between the non-metal material and the transition metal material in the high-temperature and high-pressure synthesis process, and the hardness, the strength and the toughness of the alloy material are reduced.
As a preferred scheme, the hard alloy comprises the following components in percentage by mass: 5-85% of boron carbide, 5-85% of silicon carbide, 2-13% of chromium carbide, 1-5% of vanadium carbide and 1-5% of titanium carbide.
As a preferred scheme, the hard alloy consists of the following components in percentage by mass: 6-80% of boron carbide, 6-80% of silicon carbide, 2-11% of chromium carbide, 1-3% of vanadium carbide and 1-3% of titanium carbide. The composition ratio of the hard alloy is strictly performed according to the above ratio, and if the total content of the transition metal carbide is not less than 30%, the hardness of the alloy material is greatly reduced to about HRC60, and if the total content of the transition metal is not more than 5%, the brittleness of the alloy material is increased, and the bending strength and the impact toughness are greatly reduced.
The invention also provides a preparation method of the hard alloy, which comprises the following steps: uniformly mixing raw materials including transition metal carbide and non-metal carbide, and pressing to obtain an alloy blank; and extruding the alloy blank at high temperature and cooling to obtain the alloy blank.
As a preferred solution, the purity of the raw material is not less than 99.5% of powder and/or lumps.
As a preferred scheme, the pressing mode is press pressing, and the conditions are as follows: the pressure is 15-20 MPa, and the time is 2-10 min.
As a preferred scheme, the high-temperature extrusion mode is a double-face press or a cubic press, and the conditions are as follows: the pressure is 6-10 GPa, the temperature is 1400-1600 ℃, and the time is 10-60 min. In order to ensure that the effective working pressure of the alloy blank is between 6 and 10GPa, the system working pressure of the press is between 10 and 16 GPa.
In a preferred embodiment, the high-temperature extrusion is performed by electrical heating, and the current intensity is 1500 to 2500A.
The invention also provides application of the hard alloy material in preparation of special cutting tools.
The raw materials of the alloy material provided by the invention all appear in the nature of carbide substances, do not contain substances such as oxides, nitrides and the like, are prepared by mutually cooperating a plurality of composite carbides and synthesizing at high temperature and high pressure. The melting point of the alloy material is tested>The hardness reaches over 9 grade at 1600 ℃, is second only to diamond, the Rockwell hardness is more than or equal to 80HRC, and the density is 3.3-3.9 g/cm 3 And the bending strength is not less than 1400N/c square meter, and based on the excellent mechanical property, the alloy material can meet the working condition requirements of various cutting tool steels and the requirements of parts in a high-temperature environment.
Compared with the prior art, the invention has the following excellent effects:
1) The hard alloy material provided by the invention takes the transition metal carbide and the non-metal carbide as raw materials, fully exerts the strengthening effect of carbide crystals based on the synergistic effect of all components in the raw materials, and obviously increases the strength and toughness of the alloy material while greatly improving the hardness of the alloy material.
2) In the technical scheme provided by the invention, the material is pressurized at high temperature by electric heating and a cubic press, so that the crystal lattice orientation of the original carbide is changed, and the alloy material presents a fine crystal phase. The method controls the temperature by adjusting the current intensity, achieves the purpose of controlling the material quality of the hard alloy, and can realize the controllable adjustment of the hardness and the obdurability of the alloy material.
3) In the technical scheme provided by the invention, based on the cooperativity of the raw material components and the preparation method, the alloy material is endowed with beneficial mechanical properties, so that the hardness, red hardness, wear resistance, impact resistance and bending resistance of the alloy material are greatly improved, and the alloy material also has unique physical and chemical properties of no magnetism, no conductivity, high temperature resistance, corrosion resistance, low density and the like, and can meet the material requirements of various cutting tools and the requirements of parts in a high-temperature environment.
Detailed Description
The invention is further illustrated by the following examples in which the starting materials of the present invention are commercially available and the methods of making the invention are conventional in the art unless otherwise specified, and which are intended to be illustrative of the invention and not to be limiting thereof.
Example 1
68% of boron carbide, 7% of silicon carbide, 15% of chromium carbide, 8% of titanium carbide and 2% of vanadium carbide. The five carbides are mixed in proportion and pressed into a cylindrical blank, the cylindrical blank is assembled and formed and placed on a press to be synthesized at high temperature and high pressure, the effective working temperature is 1600 ℃ during synthesis, the system working pressure is 11GPa, and the effective working pressure of the blank is not less than 7GPa after pressure transmission loss during working. The density of the obtained hard alloy is 3.66g/cm 3 The hardness is HRC86, and the bending strength is 1860N/c square meter.
Example 2
78% of silicon carbide, 6% of zirconium carbide, 13% of chromium carbide, 2% of titanium carbide and 1% of vanadium carbide. The five carbides are mixed in proportion and pressed into a cylindrical blank, the cylindrical blank is assembled and formed, the cylindrical blank is placed on a press and synthesized at high temperature and high pressure, the effective working temperature during synthesis is 1900 ℃, the working pressure of a press system is 10GPa, and the effective working pressure of the blank is not less than 6GPa after pressure transmission loss during working. The density of the obtained hard alloy is 3.84g/cm 3 The hardness is HRC84, and the bending strength is 2010N/c square meter.
Example 3
83% of boron carbide, 12% of titanium carbide, 2% of zirconium carbide and 3% of vanadium carbide, mixing the four carbides in proportion, pressing the mixture into a cylindrical blank, assembling and forming the cylindrical blank, placing the cylindrical blank on a press, and synthesizing the cylindrical blank at high temperature and high pressure, wherein the effective working temperature is 2100 ℃ during synthesis, the working pressure of a press system is 13GPa, the effective working pressure of the blank is ensured to be larger than or equal to 7GPa after the pressure transmission loss of a working chamber, and the hard alloy density of 3.41g/cm can be obtained 3 The hardness is HRC89, and the bending strength is 1600N/c square meter.
Comparative example 1
62% of silicon carbide, 6% of zirconium carbide, 26% of chromium carbide, 4% of titanium magnesium and 2% of vanadium carbide, which are completely the same as the five carbide substances in the embodiment 2, except for different proportions, the method adopts the completely same synthesis process requirements as the embodiment 2, the effective working temperature is 1900 ℃, the system working pressure is 10GPa, the effective working pressure is not less than 6GPa after the pressure transmission loss of the working chamber, and the obtained hard alloy has the density of 3.30g/cm 3 The hardness HRC56 is reduced by 34 percent, the bending strength is 2100N/c square meter, the bending strength is only improved by 4.3 percent, and the loss is avoided.
Comparative example 2
91.5 percent of boron carbide, 6 percent of titanium carbide, 1 percent of zirconium carbide and 1.5 percent of vanadium carbide, and the four carbide substances are completely the same as the four carbide substances in the embodiment 3 and only have different proportions. By adopting the same synthesis process requirements in the embodiment 3, the effective working temperature is 2100 ℃, the working pressure of a press system is 13GPa, the effective working pressure after the pressure transmission loss during working is not less than 7GPa, and the obtained hard alloy has the density of 3.28g/cm 3 The hardness is HRC96, and the bending strength is 800N/c square meter. Due to poor bending strengthThe product reaches the standard and becomes a waste product.
Claims (10)
1. A cemented carbide material characterized by: including transition metal carbides and non-metal carbides; the mass ratio of the metal carbide to the nonmetal carbide is 1:4-9.
2. A cemented carbide material according to claim 1, characterised in that: the transition metal carbide is at least one of tungsten carbide, zirconium carbide, chromium carbide, titanium carbide and vanadium carbide; the non-metal carbide is boron carbide and/or silicon carbide.
3. A cemented carbide material according to claim 2, characterised in that: comprises the following components in percentage by mass: 5-85% of boron carbide, 5-85% of silicon carbide, 2-13% of chromium carbide, 1-5% of vanadium carbide and 1-5% of titanium carbide.
4. A cemented carbide material according to claim 3, characterised in that: the composite material comprises the following components in percentage by mass: 6-80% of boron carbide, 6-80% of silicon carbide, 2-11% of chromium carbide, 1-3% of vanadium carbide and 1-3% of titanium carbide.
5. A method for producing a cemented carbide according to any one of claims 1-4, characterized in that: uniformly mixing raw materials including transition metal carbide and non-metal carbide, and pressing to obtain an alloy blank; and extruding the alloy blank at high temperature and cooling to obtain the alloy blank.
6. The method for preparing a cemented carbide material according to claim 5, wherein: the purity of the raw material is not less than 99.5% of powder and/or lumps.
7. The method for preparing a cemented carbide material according to claim 5, wherein: the pressing mode is pressing by a press, and the conditions are as follows: the pressure is 15-20 MPa, and the time is 2-10 min.
8. The method for preparing a cemented carbide material according to claim 5, characterized in that: the high-temperature extrusion mode is a double-faced top press or a six-faced top press, and the conditions are as follows: the pressure is more than or equal to 6GPa, the temperature is more than or equal to 1400 ℃, and the time is 10-60 min.
9. The method for preparing a cemented carbide material according to claim 8, wherein: the heating mode of the high-temperature extrusion is electric heating, and the current intensity is 1500-2500A.
10. Use of a cemented carbide material according to any one of claims 1 to 4, characterised in that: the method is used for preparing special cutting tools and parts in high-temperature environment.
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| CN202211208106.1A CN115572878A (en) | 2022-09-30 | 2022-09-30 | Hard alloy material and preparation method and application thereof |
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| CN202211208106.1A CN115572878A (en) | 2022-09-30 | 2022-09-30 | Hard alloy material and preparation method and application thereof |
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