CN117417183B - Composite corundum material and preparation method and application thereof - Google Patents
Composite corundum material and preparation method and application thereof Download PDFInfo
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- 229910052593 corundum Inorganic materials 0.000 title claims abstract description 102
- 239000010431 corundum Substances 0.000 title claims abstract description 102
- 239000000463 material Substances 0.000 title claims abstract description 78
- 239000002131 composite material Substances 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000227 grinding Methods 0.000 claims abstract description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 17
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000423 chromium oxide Inorganic materials 0.000 claims abstract description 14
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 14
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 11
- 238000003723 Smelting Methods 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 238000002425 crystallisation Methods 0.000 claims description 4
- 230000008025 crystallization Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005108 dry cleaning Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 18
- 230000000704 physical effect Effects 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 17
- 238000005520 cutting process Methods 0.000 description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 13
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 239000000395 magnesium oxide Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229910010413 TiO 2 Inorganic materials 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- KAEAMHPPLLJBKF-UHFFFAOYSA-N iron(3+) sulfide Chemical compound [S-2].[S-2].[S-2].[Fe+3].[Fe+3] KAEAMHPPLLJBKF-UHFFFAOYSA-N 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/346—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties utilised during polishing, or grinding operation
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
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- C04B2235/77—Density
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Abstract
The invention belongs to the technical field of artificial corundum material preparation, and particularly relates to a composite corundum material, and a preparation method and application thereof. The composite corundum material provided by the invention comprises the following components in percentage by mass: 0.2-3.8% of chromium oxide, 0.2-2.0% of titanium dioxide, 0.4-2.0% of zirconium dioxide, and the balance being aluminum oxide to 100%. The composite corundum material provided by the invention has the advantages that the hardness, the toughness and the crushing resistance of the prepared composite corundum material are effectively improved through reasonably proportioning the addition amount of each raw material and improving the preparation process, the physical properties are obviously improved compared with those of conventional single crystal corundum, the composite corundum material is very suitable for being prepared into grinding tools, and the grinding efficiency and the grinding speed can be obviously improved. Meanwhile, the corundum composite material provided by the invention is simple in preparation process, safe and environment-friendly.
Description
Technical Field
The invention belongs to the technical field of artificial corundum material preparation, and particularly relates to a composite corundum material, and a preparation method and application thereof.
Background
The single crystal fused alumina (also called 32A) abrasive, namely single crystal corundum abrasive, is one kind of corundum abrasive, and is prepared by smelting bauxite, pyrite, anthracite and scrap iron serving as raw materials in an electric arc furnace. The single crystal corundum cannot be observed by naked eyes in appearance, the content of alumina in the single crystal corundum is 98%, the appearance is gravel-shaped, the surface is glossy, the resin luster is realized, the color is light rose, but sometimes the single crystal corundum is similar to white corundum and is white or light gray, the hardness and toughness of the single crystal corundum are higher than those of the white corundum, the particles are spherical, most of the single crystal is equiaxed crystals, the single crystal quantity is 80%, the single crystal corundum has good multi-edge cutting edge, and the single crystal corundum has higher breakage resistance in grinding processing. Although the single crystal corundum abrasive has excellent grinding performance, due to H in the manufacturing process 2 S and SO 2 The production of gas and waste water seriously pollutes the environment, and the production of single crystal corundum abrasive materials is basically stopped in the world based on the environmental protection problem.
Zirconia corundum is a material composed of alumina (Al 2 O 3 ) And zirconia (ZrO 2 ) Composite corundum material is formed. Wherein the content of alumina is generally 75% -85%, and the content of zirconia is 10% -20%. It has the characteristics of high hardness, high melting point, wear resistance, corrosion resistance and the like, and is widely applied to the industrial field. However, zirconia corundum has poor thermal conductivity, and is easy to generate excessive heat in the high-temperature cutting and polishing processes, and the problems of thermal cracking, surface deformation and the like can be caused. Secondly, zirconia corundum has a high melting point and high preparation difficulty, so that the production process of the zirconia corundum is relatively complex and expensive. These drawbacks limit the use of zirconia corundum in certain fields.
For brown alumina abrasive, the content of alumina is lower than 95%, wherein, the titanium oxide TiO 2 Is the main component of brown corundum coloring, can promote microcrystallization of the corundum and increase the toughness of the corundum, but because of low alumina content in the brown corundum, the increase of non-corundum mineral composition can affect the grinding capability of the grinding material, but if the alumina content is higher than 97.5 percent, the toughness of the brown corundum is greatly reduced.
In order to improve the performance of corundum abrasive, chinese patent application CN107445600A discloses a composite corundum abrasive which comprises 2-5 parts of silicon carbide, 6-35 parts of zirconia, 17-35 parts of magnesia, 1-15 parts of chromia, 1-6 parts of ceria and the balance of alumina.
Chinese patent CN 108698934B discloses molten alumina-zirconia particles having the following chemical composition: zrO (ZrO) 2 :16% to 30% with the proviso that HfO 2 <2％；Al 2 O 3 : the percentage required to bring the total to 100%; cr (Cr) 2 O 3 ：≥0.2％；TiO 2 ：≥0.5％；Cr 2 O 3 +TiO 2 ：<7%; other elements:<3% provided that SiO 2 +CaO+MgO is less than 1.5%. The particles are made of ZrO 2 、HfO 2 Al and Al 2 O 3 Is prepared from multiple materials through compounding, and can effectively extractThe service life of the grinding tool is prolonged, but the hardness, toughness and crushing resistance of the grinding tool are not obviously improved.
Therefore, there is an urgent need to provide a composite corundum material which is safe and environment-friendly in raw material source and preparation process, and has excellent hardness, toughness and crushing resistance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a composite corundum material and a preparation method and application thereof. According to the composite corundum material provided by the invention, the hardness, toughness and crushing resistance of the prepared composite corundum material are effectively improved by reasonably proportioning the addition amount of each raw material and improving the preparation process, and the physical properties of the composite corundum material are obviously improved compared with those of conventional single crystal corundum.
The technical scheme of the invention is as follows:
the composite corundum material comprises the following components in percentage by mass:
0.2-3.8% of chromium oxide, 0.2-2.0% of titanium dioxide, 0.4-2.0% of zirconium dioxide, and the balance being aluminum oxide to 100%.
Further, the oxide of chromium is chromium oxide (Cr 2 O 3 ）。
Further, the composite corundum material comprises the following components in percentage by mass:
chromium oxide (Cr) 2 O 3 ) 0.4 to 3.2%, titanium dioxide (TiO 2 ) 0.2 to 1.3%, zirconium dioxide (ZrO 2 ) 0.4 to 1.6%, the balance being alumina (Al) 2 O 3 ) The complement is 100 percent.
Further, the sum of the mass percentages of the chromium oxide, the titanium dioxide and the zirconium dioxide is less than or equal to 6%, and the mass percentage of the aluminum oxide is 94-99%.
The composite corundum material provided by the invention is prepared by taking high-purity alpha alumina as a base material and simultaneously matching with chromium oxide, titanium dioxide, zirconium dioxide and the like in a specific proportion to carry out high-temperature smelting, and the inventor of the application finds that the mass percent of the alumina in the raw material is as follows through a great deal of experimental study94-99% by adjusting the Cr added 2 O 3 ，TiO 2 And ZrO(s) 2 The mass percentage content of the corundum composite material is in a specific range, various physical properties of the prepared corundum composite material can be effectively improved, the composite corundum material prepared by the method is hard in texture, sharp in particles and high in microhardness and crushing resistance, the grinding performance of an abrasive material can be effectively improved, the unique structure and the hard texture can enable the composite corundum material to still maintain stable performance when the composite corundum material is subjected to high-pressure, high-temperature and high-corrosion environments, and various physical properties of the composite corundum material are far superior to those of common monocrystalline corundum.
In addition, the invention also provides a preparation method of the composite corundum material, which comprises the following steps:
s1, taking 1/3 of the weight of aluminum oxide, smelting to a molten state in an electric furnace, then adding chromium oxide, titanium dioxide and zirconium oxide at the same time, continuously smelting to the molten state, finally adding the rest 2/3 of the weight of aluminum oxide, and continuously refining after smelting to the molten state;
s2, naturally cooling the mixture refined in the step S1 to room temperature for crystallization to obtain a solid substance;
s3, crushing, grinding, shaping, dry cleaning and screening the solid matters crystallized in the step S2.
Further, in the step S1, the smelting temperature of the raw materials in an electric furnace is 2300-2500 ℃.
Further, the refining time in the step S1 is 30-60 min.
The preparation process of the composite corundum material provided by the invention is simple and easy to operate, safe and environment-friendly, and meanwhile, in the aspect of raw material addition, a batch addition mode is adopted, so that the uniform mixing of the raw materials is facilitated, and the melting efficiency and the crystallization efficiency of each component can be effectively improved.
The invention also provides application of the composite corundum material in preparing grinding materials.
The composite corundum material prepared by the invention has moderate microhardness and toughness, high crushing resistance, high temperature resistance, corrosion resistance and excellent wear resistance, so that the composite corundum material is very suitable for grinding high-hardness and high-toughness materials such as high-vanadium high-speed steel, austenitic stainless steel, heat-resistant alloy steel, qin alloy and the like, and can be manufactured into high-grade cutting and grinding tools such as cutting chips, ceramic grinding tools, heavy-load grinding wheels, large-diameter cutting grinding wheels, abrasive belt products and the like. In addition, when the grinding tool is used for processing metal parts, the workpiece is not burnt, the workpiece is not polluted, the geometric profile of the workpiece is kept well, compared with a grinding tool made of common corundum materials, the grinding efficiency and the grinding speed can be remarkably improved, and meanwhile, the loss is reduced.
Compared with the prior art, the composite corundum material and the preparation method thereof provided by the invention have the following advantages:
(1) The composite corundum material provided by the invention takes alumina as a base material, and the hardness, toughness and crushing resistance of the prepared composite corundum material are effectively improved by reasonably proportioning the addition proportion of the raw materials and improving the preparation process, and the physical properties of the composite corundum material are obviously improved compared with those of conventional monocrystalline corundum.
(2) The composite corundum material prepared by the invention has the advantages of high microhardness, high compressive strength, high temperature resistance, corrosion resistance and excellent wear resistance, so that the composite corundum material has wide application field, is very suitable for preparing cutting and grinding tools, can remarkably improve grinding efficiency and speed compared with the grinding tools made of common corundum materials, and simultaneously reduces loss.
(3) The preparation method of the composite corundum material provided by the invention is simple, safe and environment-friendly, and the traditional single crystal corundum is usually added with ferric sulfide in the smelting process, so that a large amount of harmful gases such as hydrogen sulfide and the like can be generated in the whole process to cause environmental pollution, and the preparation method of the composite corundum material provided by the invention can not generate toxic and harmful gases, is an environment-friendly process, and can not negatively influence the environment and human health.
Drawings
FIG. 1 is a composite corundum material produced in example 6 of the present invention;
FIG. 2 is a model 400 cut piece made of the composite corundum material of example 6 of the present invention;
fig. 3 shows a grinding wheel made of the composite corundum material of example 8 of the present invention.
Detailed Description
The invention is further illustrated by the following description of specific embodiments, which are not intended to be limiting, and various modifications or improvements can be made by those skilled in the art in light of the basic idea of the invention, but are within the scope of the invention as long as they do not depart from the basic idea of the invention.
In the following examples and comparative examples, the reagents not specifically described were conventional reagents, which were purchased at conventional reagent manufacturing and sales companies, and the methods used, if not specifically described, were all prior art, and some of the raw material manufacturers were as follows:
the purity of the raw materials such as aluminum oxide, chromium oxide, titanium dioxide, zirconium dioxide, silicon dioxide and the like adopted in the embodiment and the comparative example is above 98 percent, and the raw materials with the same purity which can be purchased in the market can be adopted for preparation.
Specifically, aluminum oxide, chromium oxide, titanium dioxide, zirconium dioxide, silicon dioxide, magnesium oxide, and the like in examples and comparative examples of the present invention were purchased from Hubei Zhenhua chemical Co., ltd.
Examples 1-10 the composite corundum material of the present invention and its preparation method:
as shown in table 1 below, a weight proportion table (in weight%) of 10 examples of composite corundum materials according to the present invention is listed.
TABLE 1
The preparation method of the composite corundum material in the embodiments 1-10 comprises the following steps of taking a raw material 10T as an example to prepare the raw materials:
s1, taking 1/3 of the weight of aluminum oxide, smelting to a molten state in an electric furnace, then adding chromium oxide, titanium dioxide and zirconium dioxide at the same time, continuously smelting to the molten state, finally adding the rest 2/3 of the weight of aluminum oxide, and continuously refining for 40 min after smelting to the molten state; the smelting temperature in the electric furnace is 2400 ℃;
s2, naturally cooling the mixture refined in the step S1 to room temperature for crystallization to obtain a solid substance;
s3, crushing, grinding, shaping, dry cleaning and screening the solid matters crystallized in the step S2 to obtain the composite corundum material with the granularity of F46.
Comparative examples 1-5 the composite corundum material of the present invention and its preparation method:
as shown in table 2 below, a weight proportion table (in weight%) of 5 comparative examples of composite corundum materials of the present invention is listed.
TABLE 2
The preparation method of the composite corundum material of comparative examples 1-5 is the same as that of examples 1-10.
Comparative example 6 a composite corundum material and its preparation method:
comparative example 6 differs from example 6 in that chromium oxide Cr 2 O 3 Replaced by silicon dioxide SiO 2 Other components and preparation methods were the same as in example 6.
Comparative example 7 a composite corundum material and its preparation method:
comparative example 7 differs from example 6 in that zirconium dioxide ZrO 2 Other components and preparation methods are the same as in example 6, except that magnesium oxide MgO is substituted.
Comparative example 8 a composite corundum material and its preparation method:
in comparison with example 6, the difference of comparative example 8 is that in the preparation method of the composite corundum material, in step S1, all of the raw materials of aluminum oxide, chromium oxide, titanium oxide and zirconium dioxide obtained by proportioning are simultaneously put into an electric furnace, and smelted 10 h, and other components and preparation methods are the same as in example 6.
Test example one, performance detection of the composite corundum material prepared by the invention:
1. test materials: according to the invention, in examples 1-10, the composite corundum material prepared in comparative examples 1-8 is hologian single crystal corundum MA88 and Fujian Sanxiang single crystal corundum F3A.
2. The test method comprises the following steps: the particle size, microhardness (HV 0.2), crushing resistance (N), toughness (%), density (g/cm) of the above materials were respectively determined 3 ) Bulk density (g/cm) 3 ) The measurement was performed, and the detection basis and experimental data are shown in tables 3 and 4.
TABLE 3 Table 3
TABLE 4 Table 4
As can be seen from tables 1 and 2, the microhardness of the composite corundum material prepared by the components and the preparation method of the embodiments 1-10 is 2250-2330 HV0.2, the toughness is 43-55%, the crushing resistance is 34-43N, and compared with the commercial corundum material, the physical properties of the composite corundum material prepared by the embodiments 1-10 are obviously improved; when the components and the content of the preparation raw materials are changed in comparative examples 1-5, the physical properties of part of the obtained composite corundum material are reduced, wherein the reduction is more obvious especially in the values of the crushing resistance. The composite corundum material prepared by the method has excellent microhardness and toughness, and the crushing resistance can be obviously improved, so that the grinding performance of the prepared grinding material is improved.
Test example II, application performance detection of the composite corundum material prepared by the invention:
the test method comprises the following steps: the composite corundum materials prepared in examples 6-8 and comparative examples 1-8 of the present invention were prepared into 400-type cutting pieces according to a conventional method, 60# round steel was cut under the same working conditions, the cutting 5-knife allowance of the cutting pieces was recorded, the time(s) for cutting 60# round steel once, the cut quality, etc., and the test results are shown in table 5.
TABLE 5
As shown in Table 5, the cutting piece prepared from the composite corundum material prepared in examples 6-8 of the present invention cuts round steel No. 60, the allowance of the cutting 5 is 374-389, the time for cutting round steel No. 60 once is 45-47 s, the cut is smooth and bright, no burn is caused, and no color change is caused. Compared with the cutting chips of examples 6 to 8 of the present invention, the cutting chips of comparative examples 1 to 8 had significantly increased single cutting time for round steel # 60, had different degrees of burn in the cuts, had uneven cuts and burrs, and the cutting chips of comparative examples 6 and 7 were not used continuously due to severe burn, so that the allowance of 5 knife was not recorded.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (4)
1. The composite corundum material is characterized by comprising the following components in percentage by mass:
0.4-3.2% of chromium oxide, 0.2-1.3% of titanium dioxide, 0.4-1.6% of zirconium dioxide, and the balance being 100% of aluminum oxide;
the preparation method of the composite corundum material comprises the following steps:
s1, taking 1/3 of the weight of aluminum oxide, smelting to a molten state in an electric furnace, then adding chromium oxide, titanium dioxide and zirconium dioxide at the same time, continuously smelting to the molten state, finally adding the rest 2/3 of the weight of aluminum oxide, and continuously refining after smelting to the molten state;
s2, naturally cooling the mixture refined in the step S1 to room temperature for crystallization to obtain a solid substance;
s3, crushing, grinding, shaping, dry cleaning and screening the solid matters crystallized in the step S2 to obtain the solid matters;
and in the step S1, the smelting temperature of the raw materials in an electric furnace is 2300-2500 ℃.
2. The composite corundum material according to claim 1, wherein the sum of the mass percentages of the chromium oxide, the titanium dioxide and the zirconium dioxide is less than or equal to 6%, and the mass percentage of the aluminum oxide is 94-99%.
3. The composite corundum material according to claim 1, characterized in that the refining time in step S1 is 30-60 min.
4. Use of a composite corundum material according to any of claims 1-3 in the preparation of a grinding material.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1219615A (en) * | 1967-06-05 | 1971-01-20 | Corhart Refractories Co | Zirconia-alumina fused refractory materials |
| CN1281832A (en) * | 1999-07-27 | 2001-01-31 | 湖南新华联特种材料有限公司 | Abrasion-resistant corundum ceramics |
| CN105669168A (en) * | 2016-01-19 | 2016-06-15 | 济南大学 | Production method of ceramic grinding element for gypsum mill |
| CN116768608A (en) * | 2023-07-13 | 2023-09-19 | 郑州蚂蚁特材有限公司 | Semi-brittle corundum and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10061498A1 (en) * | 2000-12-08 | 2002-07-11 | Treibacher Schleifmittel Gmbh | Process for producing alumina-based corundum with increased toughness and its use in abrasives |
| DE102013111006B4 (en) * | 2013-10-04 | 2015-10-22 | Center For Abrasives And Refractories Research & Development C.A.R.R.D. Gmbh | Porous alumina-based polycrystalline Al 2 O 3 bodies with increased toughness |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1219615A (en) * | 1967-06-05 | 1971-01-20 | Corhart Refractories Co | Zirconia-alumina fused refractory materials |
| CN1281832A (en) * | 1999-07-27 | 2001-01-31 | 湖南新华联特种材料有限公司 | Abrasion-resistant corundum ceramics |
| CN105669168A (en) * | 2016-01-19 | 2016-06-15 | 济南大学 | Production method of ceramic grinding element for gypsum mill |
| CN116768608A (en) * | 2023-07-13 | 2023-09-19 | 郑州蚂蚁特材有限公司 | Semi-brittle corundum and preparation method thereof |
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