CN106242537A - A kind of heavy duty grinding wheel and metal removal alundum abrasive particle and production method - Google Patents
A kind of heavy duty grinding wheel and metal removal alundum abrasive particle and production method Download PDFInfo
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- CN106242537A CN106242537A CN201610727999.9A CN201610727999A CN106242537A CN 106242537 A CN106242537 A CN 106242537A CN 201610727999 A CN201610727999 A CN 201610727999A CN 106242537 A CN106242537 A CN 106242537A
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- abrasive particle
- alundum abrasive
- alundum
- lamellar
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- 239000002245 particle Substances 0.000 title claims abstract description 87
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000227 grinding Methods 0.000 title abstract description 21
- 229910052751 metal Inorganic materials 0.000 title abstract description 12
- 239000002184 metal Substances 0.000 title abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 8
- 235000015895 biscuits Nutrition 0.000 claims abstract description 7
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 7
- RSEIMSPAXMNYFJ-UHFFFAOYSA-N europium(III) oxide Inorganic materials O=[Eu]O[Eu]=O RSEIMSPAXMNYFJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 7
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 7
- QDOXWKRWXJOMAK-UHFFFAOYSA-N chromium(III) oxide Inorganic materials O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims abstract description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 6
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims abstract description 6
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 claims abstract description 6
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 15
- 229910052594 sapphire Inorganic materials 0.000 claims description 13
- 229940057995 liquid paraffin Drugs 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000006259 organic additive Substances 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 244000025254 Cannabis sativa Species 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 3
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000005498 polishing Methods 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 239000013078 crystal Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910001651 emery Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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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
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
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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
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3225—Yttrium oxide or oxide-forming salts thereof
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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
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
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- 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
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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Abstract
The invention discloses a kind of heavy duty grinding wheel and metal removal alundum abrasive particle and production method, its raw material composition percentage by weight is: α Al2O3Content 98 99.5%wt；SiO20.1～0.5%wt；MnO、Fe2O3、MgO、Cr2O3In one or several combination, content 0.3 1.0%wt；Rare earth oxide Eu2O3, La2O3, Y2O3In the combination of one or more, content 0.1～0.5%wt；After adding various raw materials according to raw material composition percentage by weight, add auxiliary agent and mix, utilize the mode molded or extrude to produce biscuit, then 1,550 1700 DEG C of sintering in sintering furnace.α Al is formed after sintering2O3The microstructure of dense uniform.Product has higher density and hardness.Can solve the problem that the problems such as the conventional grains grinding efficiency in heavy load field is low, the most aging.And variously-shaped laminar abrasive particle can be made by the method for extruding or mold pressing, can apply to metal removal field.
Description
Technical field
The present invention relates to a kind of alundum abrasive particle, for heavy load polishing and metal removal field, in particular
A kind of heavy load grinding alundum abrasive particle and production method thereof.
Background technology
Actual industrial production has the grinding under various load, the reconditioning of heavy load polishing mainly steel billet, abrades steel ingot
Surface defect layer；The processing of heavy castings forging；Cutting sheet, grinding disc cutting or polishing metal are also a kind of on-load mills
Cut.
Conventional heavy load polishing uses with the abrasive particle of bauxite sintering, and hardness is inadequate；It is only capable of for grinding
The material that rustless steel etc. are softer.And owing in abrasive particle, impurity content is higher, under the high temperature conditions can be the most aging.
Therefore, prior art existing defects, need to improve.
Summary of the invention
A kind of heavy duty grinding wheel and metal removal alundum abrasive particle and producer is provided for the deficiencies in the prior art
Method.
The present invention adopts the following technical scheme that
A kind of alundum abrasive particle, its raw material composition percentage by weight is: α-Al2O3Content 98-99.5%wt；SiO20.1
～0.5%wt；MnO、Fe2O3、MgO、Cr2O3In one or several combination, content 0.3-1.0%wt；Rare earth oxide
Eu2O3, La2O3, Y2O3In the combination of one or more, content 0.1～0.5%wt.
Its formula includes α-Al2O3Content 98-99.5%wt, α-Al2O3As principal crystalline phase；SiO2Content 0.1～
0.5%, SiO2Addition mainly the most at high temperature with α-Al2O3Form mullite phase, increase under the high temperature of whole microstructure
Intensity；MnO、Fe2O3、MgO、Cr2O3In one or several combination, adding of the oxide such as content 0.3-1.0%wt, MnO
Enter mainly with α-Al2O3Form solid solution, exist with on crystal boundary, suppress α-Al2O3Crystal grain grow up.Rare earth oxide Eu2O3,
La2O3, Y2O3In the combination of one or more, content 0.1～0.5%wt, the addition of rare earth oxide is to deposit as bulky grain
It is α-Al2O3Crystal boundary on, prevent crystal grain abnormal growth and suppression grain boundary defects extension, increase product toughness, microcosmic
Crystal phase structure is as shown in Figure 1.By the effect of above additive, the physical characteristic of product can reach, and density is more than 3.74g/
mm3, hardness HV is more than 1400kg/mm2。
Described alundum abrasive particle, its density is more than 3.74g/mm3, hardness HV is more than 1400kg/mm2。
Described alundum abrasive particle, wherein α-Al2O3With the addition of powder, diameter of particle 1-5um.
Described alundum abrasive particle, including strip alundum abrasive particle and lamellar alundum abrasive particle, wherein strip burns
Knot alumina grain includes column type alundum abrasive particle, trifolium-shaped alundum abrasive particle, annulus stripe shape alundum abrasive particle；Institute
The column type alundum abrasive particle stated, its cross section is circular, and the ratio of length and diameter is 1.5 to 5；Described trifolium-shaped
Alundum abrasive particle, its cross section is the inner circle that three symmetrical sizes of cylindrical inscribe are identical, and three inner circles are the most circumscribed, length
It is 1.5 to 5 with the ratio of diameter；Described annulus stripe shape alundum abrasive particle, its cross section is annulus, its internal diameter and external diameter ratio
Value is 1/4 to 3/4, and the ratio of length and diameter is 1.5 to 5；
Lamellar alundum abrasive particle includes triangle lamellar alundum abrasive particle and hexagon lamellar alundum abrasive particle, institute
The triangular form lamellar alundum abrasive particle stated, its cross section is equilateral triangle, and its thickness is 1/10 to the 1/2 of the length of side；Described
Hexagon lamellar alundum abrasive particle, its cross section is hexagon, and its thickness is 1/10 to the 1/2 of the length of side.
The production method of a kind of arbitrary described alundum abrasive particle, adds various raw materials according to raw material composition percentage by weight
After, add auxiliary agent and mix, utilize the mode molded or extrude to produce biscuit, then 1550-1700 in sintering furnace
DEG C sintering.
Described production method, wherein auxiliary agent refers to that content accounts for institute in order to improve the organic additive that powder body processability adds
The percentage ratio stating raw material weight sum is: liquid paraffin 5-10%wt；Stearic acid 0.5-1.0%wt.
Described production method, wherein mixing is various raw materials and auxiliary agent to be mixed by churned mechanically mode；Its
Middle mold pressing is, by roll, the powder body after stirring is clamp-oned die cavity, and wherein extruding is, by screw rod, the powder body after stirring is clamp-oned mould
Chamber.
Described production method, the biscuit after wherein sintering is by molding, 1550-1700 DEG C of sintering 60-200 in kiln
Minute.
It is low that the present invention solves conventional grains grinding efficiency, the problem that abrasive particle is the most aging.Patent of the present invention is micro-with aluminium oxide
Powder is primary raw material, adds MnO, Fe2O3、MgO、Cr2O3In one or several combination, rare earth oxide Eu2O3,
La2O3, Y2O3In the combination of one or more, by the abrasive particle made of method of sintering.The effect of the oxide added is fall
The sintering temperature of al suboxide, growing up of suppression crystal grain.α-Al is formed after sintering2O3The microstructure of dense uniform.Product has
Higher density and hardness.Can solve the problem that the problems such as the conventional grains grinding efficiency in heavy load field is low, the most aging.And lead to
The method crossing extruding or mold pressing can make variously-shaped laminar abrasive particle, can apply to metal removal field.
Accompanying drawing explanation
Fig. 1 is abrasive particle crystal phase structure figure of the present invention；1, α-Al2O3Crystal grain, 2, rare earth oxide, 3, MnO2Brilliant in solid solution
Boundary；
Fig. 2 is column type abrasive particle schematic diagram (left) and pictorial diagram (right)；
Fig. 3 is trifolium-shaped abrasive particle schematic diagram (left) and pictorial diagram (right)；
Fig. 4 is annulus stripe shape abrasive particle schematic diagram (left) and pictorial diagram (right)；
Fig. 5 is triangular form abrasive particle schematic diagram (left) and pictorial diagram (right)；
Fig. 6 is hexangle type abrasive particle schematic diagram (left) and pictorial diagram (right).
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1 formula test and the physical characteristic of product
Alundum abrasive particle, its raw material composition percentage by weight is: α-Al2O3Content 98-99.5%wt；SiO20.1～
0.5%wt；MnO、Fe2O3、MgO、Cr2O3In one or several combination, content 0.3-1.0%wt；Rare earth oxide
Eu2O3, La2O3, Y2O3In the combination of one or more, content 0.1～0.5%wt；
Being also added with auxiliary agent, auxiliary agent refers to that content is above-mentioned raw materials in order to improve the organic additive that powder body processability adds
The percentage ratio of weight sum: liquid paraffin 5-10%wt；Stearic acid 0.5-1.0%wt.
The shape of described alundum abrasive particle has strip and lamellar two class, and wherein strip is column type (Fig. 2), Herba Trifolii Pratentis
Type (Fig. 3), annulus stripe shape (Fig. 4).It is molded into emery wheel after mixing with resinoid bond, is mainly used in heavy load polishing field.
The advantage of column type is that intensity is high, the most easy to wear, but little with the contact area of resinoid bond, and adhesion is inadequate, easily takes off
Fall.Trifolium-shaped and annulus stripe shape, increase the contact area with resinoid bond, and adhesion is good, and abrasive particle is not easy from emery wheel
Come off.And trifolium-shaped and annulus stripe shape, little with grinding workpiece contact area in grinding process, abrasive particle can peel off layer by layer,
Self-sharpening is good, and grinding efficiency is high.
The following is the feature description of strip abrasive particle: described column type alundum abrasive particle, its cross section is circular, length
It is 1.5 to 5 with the ratio of diameter.Described trifolium-shaped alundum abrasive particle, its cross section is that cylindrical inscribe three is symmetrical
The inner circle that size is identical, three inner circles are the most circumscribed, and the ratio of length and diameter is 1.5 to 5.Described annulus stripe shape sintering is just
Beautiful abrasive particle, its cross section is annulus, it is characterized by that internal diameter and external diameter ratio are 1/4 to 3/4, and the ratio of length and diameter is 1.5
To 5.
The abrasive particle of lamellar mainly comprises triangle lamellar, and hexagon lamellar, is mainly used in Metal Cutting and polishing neck
The resin cutting slice in territory and grinding disc.Owing to abrasive particle ratio itself is relatively thin, it is easy to make relatively thin cutting sheet/grinding disc.And three
Angle-style abrasive particle or the seamed edge of hexangle type abrasive particle, wedge angle can be obviously improved stock-removing efficiency.
The following is the feature description of lamellar abrasive particle:
Described triangular form alundum abrasive particle, cross section is equilateral triangle, it is characterized by that thickness is the 1/10 of the length of side
To 1/2.Described hexangle type alundum abrasive particle, cross section is hexagon, it is characterized by that thickness is the length of side 1/10 to 1/2.
Specific experiment as shown in table 1 below is carried out according to above-mentioned formula:
Table 1
By α-Al2O3Powder, SiO2The oxide powder such as powder, MnO, Eu2O3Join according to upper table Deng RE oxide powder
Side weighs, and mixes 30 minutes in high speed mixer the most again.The powder mixed is put into kneader, and adds by upper table formula
Enter liquid paraffin and magnesium stearate, mediate 30 minutes.Kneaded material is put into roller extruder or screw extruder,
Join difform mould, squeeze out difform biscuit.Biscuit is stood 12 hours, subsequently into sintering furnace at 1700 DEG C
Sinter the abrasive particle that i.e. can obtain needing 100 minutes.The density and hardness of abrasive particle, result after sintering with durometer and densimeter measurement
As shown above.
Steel billet of polishing under embodiment 2 abrasive particle heavy load is tested
The strip particle abrasive particle resinoid bond of making of above-mentioned formula is fabricated toThickness 76mm emery wheel, enters
Row grinding test.Experimental condition: grinding speed 80m/s, load 1000Kgf.Result of the test is as shown in table 2 below:
Table 2
| Emery wheel is numbered | Abrasive particle shape | Formula number | Workpiece stock removal (g) | Emery wheel waste (g) | Wear resistance ratio |
| 1 | Column type | 1 | 2802 | 400 | 7.0 |
| 2 | Trifolium-shaped | 1 | 3695 | 493 | 7.5 |
| 3 | Open circles bar | 1 | 3599 | 467 | 7.7 |
| 4 | Column type | 2 | 2703 | 398 | 6.8 |
| 5 | Trifolium-shaped | 2 | 3254 | 452 | 7.2 |
| 6 | Open circles bar | 2 | 3301 | 452 | 7.3 |
| 7 | Column type | 3 | 2794 | 405 | 6.9 |
| 8 | Trifolium-shaped | 3 | 3255 | 465 | 7.0 |
| 9 | Open circles bar | 3 | 3289 | 463 | 7.1 |
The grinding efficiency of the present invention is relatively good as can be seen from Table 1.
The Metal Cutting test of embodiment 3 lamellar abrasive particle
The triangular form abrasive particle produced in embodiment 1 and hexagon abrasive particle are added resinoid bond and fiberglass reinforced mesh sheet,
It is fabricated toThickness 1.0 cuts sheet, carries out cutting test.Cutting speed 80m/s, tests material Φ 16#45 rod iron.
Table 3
In the present invention, cutting efficiency and the life-span of abrasive particle are relatively good as can be seen from Table 3.
The metal polishing test of embodiment 4 lamellar abrasive particle
The triangular form abrasive particle produced in embodiment 1 and hexagon abrasive particle are added resinoid bond and fiberglass reinforced mesh sheet,
It is fabricated toThickness 3.0 grinding disc, carries out metal polishing test.Test material #45 steel, polisher power 720W, rotating speed
11000RPM, material #45 steel of polishing, polish 10 minutes time.
Table 4
In the present invention, the grinding efficiency of abrasive particle is relatively good as can be seen from Table 4.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (8)
1. an alundum abrasive particle, it is characterised in that its raw material composition percentage by weight is: α-Al2O3Content 98-99.5%
wt；SiO20.1～0.5%wt；MnO、Fe2O3、MgO、Cr2O3In one or several combination, content 0.3-1.0%wt；
Rare earth oxide Eu2O3, La2O3, Y2O3In the combination of one or more, content 0.1～0.5%wt.
Alundum abrasive particle the most according to claim 1, it is characterised in that the density of described alundum abrasive particle is more than
3.74g/mm3, hardness HV is more than 1400kg/mm2。
Alundum abrasive particle the most according to claim 1, it is characterised in that wherein α-Al2O3With the addition of powder,
Diameter of particle 1-5um.
Alundum abrasive particle the most according to claim 1, it is characterised in that described alundum abrasive particle includes that strip burns
Knot alumina grain and lamellar alundum abrasive particle, wherein strip alundum abrasive particle includes column type alundum abrasive particle, SANYE
Grass type alundum abrasive particle, annulus stripe shape alundum abrasive particle；Described column type alundum abrasive particle, its cross section is circle
The ratio of shape, length and diameter is 1.5 to 5；Described trifolium-shaped alundum abrasive particle, its cross section is cylindrical inscribe three
The inner circle that symmetrical size is identical, three inner circles are the most circumscribed, and the ratio of length and diameter is 1.5 to 5；Described annulus stripe shape
Alundum abrasive particle, its cross section is annulus, and its internal diameter and external diameter ratio are 1/4 to 3/4, and the ratio of length and diameter is 1.5
To 5；
Lamellar alundum abrasive particle includes triangle lamellar alundum abrasive particle and hexagon lamellar alundum abrasive particle, described
Triangular form lamellar alundum abrasive particle, its cross section is equilateral triangle, and its thickness is 1/10 to the 1/2 of the length of side；Described six
Dihedral lamellar alundum abrasive particle, its cross section is hexagon, and its thickness is 1/10 to the 1/2 of the length of side.
5. the production method of the arbitrary described alundum abrasive particle of claim 1-4, it is characterised in that according to raw material composition weight
After amount percentage ratio adds various raw materials, add auxiliary agent and mix, utilize the mode molded or extrude to produce biscuit, then
1550-1700 DEG C of sintering in sintering furnace.
6. according to the production method described in claim 5, it is characterised in that wherein auxiliary agent refers to as improving powder body processability
The organic additive added, content accounts for the percentage ratio of described raw material weight sum and is: liquid paraffin 5-10%wt；Stearic acid 0.5-
1.0%wt.
7. according to the production method described in claim 5, it is characterised in that wherein mixing is various raw materials and auxiliary agent to be led to
Cross churned mechanically mode to mix；Wherein molding is, by roll, the powder body after stirring is clamp-oned die cavity, and wherein extruding is to pass through
Powder body after stirring is clamp-oned die cavity by screw rod.
8. according to the production method described in claim 5, it is characterised in that the biscuit after wherein sintering is by molding, at kiln
In stove, 1550-1700 DEG C sinters 60-200 minute.
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| EP3957618A1 (en) * | 2020-08-21 | 2022-02-23 | Ivoclar Vivadent AG | Aluminum-oxide ceramic material |
| CN116477966A (en) * | 2023-04-26 | 2023-07-25 | 深圳市博迪科技开发有限公司 | Preparation method of a non-shedding hydroxyapatite-based porous ceramic |
| 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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| CN116477966B (en) * | 2023-04-26 | 2024-08-06 | 深圳市博迪科技开发有限公司 | Preparation method of hydroxyapatite-based porous ceramic without powder falling |
| 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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