CN106278279A - A kind of titanium boride base composite ceramic mold materials and preparation method thereof - Google Patents
A kind of titanium boride base composite ceramic mold materials and preparation method thereof Download PDFInfo
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- CN106278279A CN106278279A CN201610621884.1A CN201610621884A CN106278279A CN 106278279 A CN106278279 A CN 106278279A CN 201610621884 A CN201610621884 A CN 201610621884A CN 106278279 A CN106278279 A CN 106278279A
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Abstract
The invention discloses a kind of titanium boride base composite ceramic mold materials and preparation method thereof, described material, according to mass percent, is made up of following components: titanium boride 50.0～58.0%, zirconium carbide 21.3～24%, silicon nitride 11.0～13.8%, terbia. Diterbium trioxide 1.0～1.8%, Dithulium trioxide 3.2～3.8%, lithium carbonate 1.8～2.2%, aluminium carbide 1.6～2.0%, copper oxide 2.1～2.4%；Wherein titanium boride is mixed by the nanometer titanium boride powder body that the particle diameter that mass ratio is 1:0.12～0.18 is 5～15nm and the micron titanium boride powder body that particle diameter is 15～25 μm；Weigh each material powder, ball mill mixing in proportion, dry, grind and sieve, granulating and forming, gas pressure sintering, to obtain final product.Material of the present invention has fracture toughness, hardness, bending strength and the heat resistance of excellence, can be widely applied in mold materials.
Description
Technical field
The present invention relates to ceramic die material technical field, specifically a kind of titanium boride base composite ceramic mold materials and
Preparation method.
Background technology
Mould is the instrument making blank become the product having given shape and size under external force.It is widely used in punching
The compression moulding of the goods such as sanction, die forging, cold-heading, extruding, metallic sintered products compacting, compression casting, and engineering plastics, rubber, pottery
Or in the forming of injection.Mould has specific profile or cavity shape, and application has the contour shape of cutting edge can be made
Contour line shape generation stamping-out pressed by blank.Application cavity shape can make blank obtain corresponding three-dimensional shape.Mould generally comprises
Dynamic model and two parts of cover half, the two partable.Take out product time separately, make blank inject mold cavity when closing up and shape.
Mould is precision instrument, complex-shaped, bears the expansive force of blank, to structural strength, rigidity, case hardness, surface roughness and
Machining accuracy all has higher requirements, and the level of development that mould produces is one of important symbol of machine-building level.
Mould be communication equipment, industrial devices, auto parts and components manufacture in indispensable important equipment, but mould
Working environment, such as huge pinch shock, flowing friction etc., mold temperature all can be caused to raise, so it occur frequently that mould
The phenomenons such as sticking to mould, seam or oxidation, these all exacerbate the abrasion of mould and greatly reduce the mold use life-span.The hottest
The higher temperature that extrusion process produces would generally make mold materials soften and wearability decline, reduction in service life and product
Surface quality is poor.Therefore, the important channel improving die life is exactly the mold materials selecting high-wearing feature with high rigidity.
Structural ceramics has superior intensity, hardness, insulating properties, conduction of heat, high temperature resistant, resistance to oxidation, corrosion-resistant, wear-resisting
The characteristics such as consumption, elevated temperature strength, therefore, it is with a wide range of applications in a mold.
Titanium boride ceramics owing to having higher fusing point, stable chemical property, more excellent anti-wear performance, often by with
Make hard tool materials and wearing piece, but the sintering character of single-phase titanium boride ceramics is poor, and its cold-shortness and poor
Heat resistance also brings difficulty for its preparation.The present invention, by promoting the performance of titanium boride ceramics material, improves boronation
The fracture toughness of titanium ceramic material, hardness, bending strength and heat resistance, can expand the titanium boride ceramics application at mould.
Summary of the invention
It is an object of the invention to provide the boron of a kind of fracture toughness, hardness, bending strength and heat resistance with excellence
Change titanio composite ceramic die material and preparation method thereof.
For achieving the above object, the present invention provides following technical scheme:
A kind of titanium boride base composite ceramic mold materials, according to mass percent, is made up of following components: titanium boride
50.0～58.0%, zirconium carbide 21.3～24%, silicon nitride 11.0～13.8%, terbia. Diterbium trioxide 1.0～1.8%, Dithulium trioxide 3.2～
3.8%, lithium carbonate 1.8～2.2%, aluminium carbide 1.6～2.0%, copper oxide 2.1～2.4%；Wherein titanium boride is 5 by particle diameter
～the nanometer titanium boride powder body of 15nm and micron titanium boride powder body that particle diameter is 15～25 μm are according to mass ratio 1:0.12～0.18
Ratio mix；The particle diameter of zirconium carbide and silicon nitride is 15～25nm；The particle diameter of terbia. Diterbium trioxide and Dithulium trioxide be 50～
100nm；The particle diameter of lithium carbonate, aluminium carbide and copper oxide is 5～50nm.
As the further scheme of the present invention: according to mass percent, be made up of following components: titanium boride 53.0～
55.0%, zirconium carbide 22.5～23.5%, silicon nitride 12.0～12.5%, terbia. Diterbium trioxide 1.3～1.5%, Dithulium trioxide 3.4～
3.6%, lithium carbonate 1.9～2.1%, aluminium carbide 1.7～1.9%, copper oxide 2.2～2.3%.
As the further scheme of the present invention: according to mass percent, be made up of following components: titanium boride 54.0%,
Zirconium carbide 22.8%, silicon nitride 12.2%, terbia. Diterbium trioxide 1.4%, Dithulium trioxide 3.5%, lithium carbonate 2.0%, aluminium carbide 1.8%, oxygen
Change copper 2.3%.
The preparation method of described titanium boride base composite ceramic mold materials, comprises the following steps:
(1) weigh each material powder in proportion, load weighted powder is placed in ball grinder and carries out ball mill mixing, according to
Material: zirconia ball: the mass ratio of dehydrated alcohol is that the ratio of 1:2～6:1～1.5 adds zirconia ball and dehydrated alcohol, utilizes
Planetary ball mill makes it fully mix, and ball milling speed is 400～500r/min, and Ball-milling Time is 8～12h；
(2) being placed in the powder that ball milling is good in the baking oven that temperature is 65～85 DEG C to heat and be evaporated, evaporation limit, limit is stirred, until
Dehydrated alcohol all volatilizees complete, then the compound after drying grinds, and sieves with 180～200 eye mesh screens；
(3) compound after sieving carries out pelletize by drying process with atomizing, then the powder body of pelletize is put into mould
It is shaped, obtains ceramic die biscuit finally by isostatic cool pressing technique；
(4) use two step thermal-insulating methods to carry out gas pressure sintering, specifically include following steps:
41) ceramic die biscuit is put into graphite crucible, carry out gas pressure sintering in a nitrogen atmosphere；
42) first it is warming up to 900～1000 DEG C with the heating rate of 10～15 DEG C/min；
43) continue be warming up to 1300～1350 DEG C with the heating rate of 3～5 DEG C/min, and at this temperature insulation 1～
2h；
44) be then warming up to 1500～1550 DEG C with the heating rate of 3～5 DEG C/min, and at this temperature insulation 2～
5h；
45) cool to less than 100 DEG C with the furnace, take out, obtain described titanium boride base composite ceramic mould.
As the further scheme of the present invention: in described step (1), material: zirconia ball: the mass ratio of dehydrated alcohol is
1:5:1.2, ball milling speed is 450r/min, and Ball-milling Time is 10h.
As the further scheme of the present invention: in described step (4), nitrogen atmosphere is the nitrogen of 1.5～10atm.
As the further scheme of the present invention: described step 42) in, nitrogen atmosphere is the nitrogen of 2atm；Described step
Rapid 43), in, nitrogen atmosphere is the nitrogen of 4atm；Described step 44) in, nitrogen atmosphere is the nitrogen of 6atm.
As the further scheme of the present invention: described step 43) in, it is warming up to 1320 with the heating rate of 3 DEG C/min
DEG C, it is incubated 2h.
As the further scheme of the present invention: described step 44) in, it is warming up to 1510 with the heating rate of 5 DEG C/min
～1535 DEG C, it is incubated 4h.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention by advance the titanium boride powder body of nanoscale and two kinds of different stages of micron order being mixed as matrix, with
Zirconium carbide and silicon nitride, for strengthening phase, with terbia. Diterbium trioxide and Dithulium trioxide as stabilizer, are simultaneously introduced lithium carbonate, aluminium carbide and copper oxide
As sintering aid, obtain a kind of titanium boride base composite ceramic mould through wet ball grinding mixing, drying, pelletize, pressing mold, gas pressure sintering
Tool material, this material not only has stable chemical property, excellent anti-wear performance, also have excellence fracture toughness, hardness,
Bending strength and heat resistance, it is possible to meet the needs that Practical Project uses, can be widely applied in mold materials.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of titanium boride base composite ceramic mold materials, according to mass percent, by following group
Divide and make: titanium boride 50.0%, zirconium carbide 24%, silicon nitride 13.8%, terbia. Diterbium trioxide 1.8%, Dithulium trioxide 3.8%, lithium carbonate
2.2%, aluminium carbide 2.0%, copper oxide 2.4%；Wherein titanium boride is by the nanometer titanium boride powder body that particle diameter is 5～15nm and particle diameter
It is that the micron titanium boride powder body of 15～25 μm mixes according to the ratio of mass ratio 1:0.12；Zirconium carbide and the particle diameter of silicon nitride
It is 15～25nm；The particle diameter of terbia. Diterbium trioxide and Dithulium trioxide is 50～100nm；The particle diameter of lithium carbonate, aluminium carbide and copper oxide is equal
It is 5～50nm.
The preparation method of described titanium boride base composite ceramic mold materials, comprises the following steps:
(1) weigh each material powder in proportion, load weighted powder is placed in ball grinder and carries out ball mill mixing, according to
Material: zirconia ball: the mass ratio of dehydrated alcohol is that the ratio of 1:2:1 adds zirconia ball and dehydrated alcohol, utilizes planetary ball
Grinding machine makes it fully mix, and ball milling speed is 500r/min, and Ball-milling Time is 12h；
(2) being placed in the powder that ball milling is good in the baking oven that temperature is 85 DEG C to heat and be evaporated, evaporation limit, limit is stirred, until anhydrous
Ethanol all volatilizees complete, then the compound after drying grinds, and sieves with 200 eye mesh screens；
(3) compound after sieving carries out pelletize by drying process with atomizing, then the powder body of pelletize is put into mould
It is shaped, obtains ceramic die biscuit finally by isostatic cool pressing technique；
(4) use two step thermal-insulating methods to carry out gas pressure sintering, specifically include following steps:
41) ceramic die biscuit is put into graphite crucible, carry out gas pressure sintering in a nitrogen atmosphere；
42) first it is warming up to 1000 DEG C with the heating rate of 10 DEG C/min；Nitrogen atmosphere is the nitrogen of 1.5atm；
43) continue to be warming up to 1300 DEG C with the heating rate of 5 DEG C/min, and be incubated 2h at this temperature；Nitrogen atmosphere is
The nitrogen of 6atm；
44) then it is warming up to 1500 DEG C with the heating rate of 3 DEG C/min, and is incubated 2h at this temperature；Nitrogen atmosphere is
The nitrogen of 10atm；
45) cool to less than 100 DEG C with the furnace, take out, obtain described titanium boride base composite ceramic mould.
Embodiment 2
In the embodiment of the present invention, a kind of titanium boride base composite ceramic mold materials, according to mass percent, by following group
Divide and make: titanium boride 58.0%, zirconium carbide 21.3%, silicon nitride 11.0%, terbia. Diterbium trioxide 1.0%, Dithulium trioxide 3.2%, lithium carbonate
1.8%, aluminium carbide 1.6%, copper oxide 2.1%；Wherein titanium boride is by the nanometer titanium boride powder body that particle diameter is 5～15nm and particle diameter
It is that the micron titanium boride powder body of 15～25 μm mixes according to the ratio of mass ratio 1:0.18；Zirconium carbide and the particle diameter of silicon nitride
It is 15～25nm；The particle diameter of terbia. Diterbium trioxide and Dithulium trioxide is 50～100nm；The particle diameter of lithium carbonate, aluminium carbide and copper oxide is equal
It is 5～50nm.
The preparation method of described titanium boride base composite ceramic mold materials, comprises the following steps:
(1) weigh each material powder in proportion, load weighted powder is placed in ball grinder and carries out ball mill mixing, according to
Material: zirconia ball: the mass ratio of dehydrated alcohol is that the ratio of 1:6:1.5 adds zirconia ball and dehydrated alcohol, utilizes planetary
Ball mill makes it fully mix, and ball milling speed is 400r/min, and Ball-milling Time is 8h；
(2) being placed in the powder that ball milling is good in the baking oven that temperature is 65 DEG C to heat and be evaporated, evaporation limit, limit is stirred, until anhydrous
Ethanol all volatilizees complete, then the compound after drying grinds, and sieves with 180 eye mesh screens；
(3) compound after sieving carries out pelletize by drying process with atomizing, then the powder body of pelletize is put into mould
It is shaped, obtains ceramic die biscuit finally by isostatic cool pressing technique；
(4) use two step thermal-insulating methods to carry out gas pressure sintering, specifically include following steps:
41) ceramic die biscuit is put into graphite crucible, carry out gas pressure sintering in a nitrogen atmosphere；
42) first it is warming up to 900 DEG C with the heating rate of 15 DEG C/min；Nitrogen atmosphere is the nitrogen of 2atm；
43) continue to be warming up to 1350 DEG C with the heating rate of 3 DEG C/min, and be incubated 1h at this temperature；Nitrogen atmosphere is
The nitrogen of 4atm；
44) then it is warming up to 1550 DEG C with the heating rate of 5 DEG C/min, and is incubated 5h at this temperature；Nitrogen atmosphere is
The nitrogen of 6atm；
45) cool to less than 100 DEG C with the furnace, take out, obtain described titanium boride base composite ceramic mould.
Embodiment 3
In the embodiment of the present invention, a kind of titanium boride base composite ceramic mold materials, according to mass percent, by following group
Divide and make: titanium boride 53.0%, zirconium carbide 23.1%, silicon nitride 12.5%, terbia. Diterbium trioxide 1.5%, Dithulium trioxide 3.6%, lithium carbonate
2.1%, aluminium carbide 1.9%, copper oxide 2.3%；Wherein titanium boride is by the nanometer titanium boride powder body that particle diameter is 5～15nm and particle diameter
It is that the micron titanium boride powder body of 15～25 μm mixes according to the ratio of mass ratio 1:0.14；Zirconium carbide and the particle diameter of silicon nitride
It is 15～25nm；The particle diameter of terbia. Diterbium trioxide and Dithulium trioxide is 50～100nm；The particle diameter of lithium carbonate, aluminium carbide and copper oxide is equal
It is 5～50nm.
The preparation method of described titanium boride base composite ceramic mold materials, comprises the following steps:
(1) weigh each material powder in proportion, load weighted powder is placed in ball grinder and carries out ball mill mixing, according to
Material: zirconia ball: the mass ratio of dehydrated alcohol is that the ratio of 1:5:1.2 adds zirconia ball and dehydrated alcohol, utilizes planetary
Ball mill makes it fully mix, and ball milling speed is 450r/min, and Ball-milling Time is 10h；
(2) being placed in the powder that ball milling is good in the baking oven that temperature is 70 DEG C to heat and be evaporated, evaporation limit, limit is stirred, until anhydrous
Ethanol all volatilizees complete, then the compound after drying grinds, and sieves with 180 eye mesh screens；
(3) compound after sieving carries out pelletize by drying process with atomizing, then the powder body of pelletize is put into mould
It is shaped, obtains ceramic die biscuit finally by isostatic cool pressing technique；
(4) use two step thermal-insulating methods to carry out gas pressure sintering, specifically include following steps:
41) ceramic die biscuit is put into graphite crucible, carry out gas pressure sintering in a nitrogen atmosphere；
42) first it is warming up to 950 DEG C with the heating rate of 12 DEG C/min；Nitrogen atmosphere is the nitrogen of 2atm；
43) continue to be warming up to 1320 DEG C with the heating rate of 3 DEG C/min, and be incubated 2h at this temperature；Nitrogen atmosphere is
The nitrogen of 4atm；
44) then it is warming up to 1521 DEG C with the heating rate of 5 DEG C/min, and is incubated 4h at this temperature；Nitrogen atmosphere is
The nitrogen of 6atm；
45) cool to less than 100 DEG C with the furnace, take out, obtain described titanium boride base composite ceramic mould.
Embodiment 4
In the embodiment of the present invention, a kind of titanium boride base composite ceramic mold materials, according to mass percent, by following group
Divide and make: titanium boride 55.0%, zirconium carbide 22.5%, silicon nitride 12.0%, terbia. Diterbium trioxide 1.3%, Dithulium trioxide 3.4%, lithium carbonate
1.9%, aluminium carbide 1.7%, copper oxide 2.2%；Wherein titanium boride is by the nanometer titanium boride powder body that particle diameter is 5～15nm and particle diameter
It is that the micron titanium boride powder body of 15～25 μm mixes according to the ratio of mass ratio 1:0.16；Zirconium carbide and the particle diameter of silicon nitride
It is 15～25nm；The particle diameter of terbia. Diterbium trioxide and Dithulium trioxide is 50～100nm；The particle diameter of lithium carbonate, aluminium carbide and copper oxide is equal
It is 5～50nm.
The preparation method of described titanium boride base composite ceramic mold materials, comprises the following steps:
(1) weigh each material powder in proportion, load weighted powder is placed in ball grinder and carries out ball mill mixing, according to
Material: zirconia ball: the mass ratio of dehydrated alcohol is that the ratio of 1:5:1.2 adds zirconia ball and dehydrated alcohol, utilizes planetary
Ball mill makes it fully mix, and ball milling speed is 450r/min, and Ball-milling Time is 10h；
(2) being placed in the powder that ball milling is good in the baking oven that temperature is 80 DEG C to heat and be evaporated, evaporation limit, limit is stirred, until anhydrous
Ethanol all volatilizees complete, then the compound after drying grinds, and sieves with 200 eye mesh screens；
(3) compound after sieving carries out pelletize by drying process with atomizing, then the powder body of pelletize is put into mould
It is shaped, obtains ceramic die biscuit finally by isostatic cool pressing technique；
(4) use two step thermal-insulating methods to carry out gas pressure sintering, specifically include following steps:
41) ceramic die biscuit is put into graphite crucible, carry out gas pressure sintering in a nitrogen atmosphere；
42) first it is warming up to 950 DEG C with the heating rate of 12 DEG C/min；Nitrogen atmosphere is the nitrogen of 2atm；
43) continue to be warming up to 1320 DEG C with the heating rate of 3 DEG C/min, and be incubated 2h at this temperature；Nitrogen atmosphere is
The nitrogen of 4atm；
44) then it is warming up to 1527 DEG C with the heating rate of 5 DEG C/min, and is incubated 4h at this temperature；Nitrogen atmosphere is
The nitrogen of 6atm；
45) cool to less than 100 DEG C with the furnace, take out, obtain described titanium boride base composite ceramic mould.
Embodiment 5
In the embodiment of the present invention, a kind of titanium boride base composite ceramic mold materials, according to mass percent, by following group
Divide and make: titanium boride 54.0%, zirconium carbide 22.8%, silicon nitride 12.2%, terbia. Diterbium trioxide 1.4%, Dithulium trioxide 3.5%, lithium carbonate
2.0%, aluminium carbide 1.8%, copper oxide 2.3%；Wherein titanium boride is by the nanometer titanium boride powder body that particle diameter is 5～15nm and particle diameter
It is that the micron titanium boride powder body of 15～25 μm mixes according to the ratio of mass ratio 1:0.15；Zirconium carbide and the particle diameter of silicon nitride
It is 15～25nm；The particle diameter of terbia. Diterbium trioxide and Dithulium trioxide is 50～100nm；The particle diameter of lithium carbonate, aluminium carbide and copper oxide is equal
It is 5～50nm.
The preparation method of described titanium boride base composite ceramic mold materials, comprises the following steps:
(1) weigh each material powder in proportion, load weighted powder is placed in ball grinder and carries out ball mill mixing, according to
Material: zirconia ball: the mass ratio of dehydrated alcohol is that the ratio of 1:5:1.2 adds zirconia ball and dehydrated alcohol, utilizes planetary
Ball mill makes it fully mix, and ball milling speed is 450r/min, and Ball-milling Time is 10h；
(2) being placed in the powder that ball milling is good in the baking oven that temperature is 75 DEG C to heat and be evaporated, evaporation limit, limit is stirred, until anhydrous
Ethanol all volatilizees complete, then the compound after drying grinds, and sieves with 200 eye mesh screens；
(3) compound after sieving carries out pelletize by drying process with atomizing, then the powder body of pelletize is put into mould
It is shaped, obtains ceramic die biscuit finally by isostatic cool pressing technique；
(4) use two step thermal-insulating methods to carry out gas pressure sintering, specifically include following steps:
41) ceramic die biscuit is put into graphite crucible, carry out gas pressure sintering in a nitrogen atmosphere；
42) first it is warming up to 950 DEG C with the heating rate of 12 DEG C/min；Nitrogen atmosphere is the nitrogen of 2atm；
43) continue to be warming up to 1320 DEG C with the heating rate of 3 DEG C/min, and be incubated 2h at this temperature；Nitrogen atmosphere is
The nitrogen of 4atm；
44) then it is warming up to 1524 DEG C with the heating rate of 5 DEG C/min, and is incubated 4h at this temperature；Nitrogen atmosphere is
The nitrogen of 6atm；
45) cool to less than 100 DEG C with the furnace, take out, obtain described titanium boride base composite ceramic mould.
The present invention by advance the titanium boride powder body of nanoscale and two kinds of different stages of micron order being mixed as matrix, with
Zirconium carbide and silicon nitride, for strengthening phase, with terbia. Diterbium trioxide and Dithulium trioxide as stabilizer, are simultaneously introduced lithium carbonate, aluminium carbide and copper oxide
As sintering aid, obtain a kind of titanium boride base composite ceramic mould through wet ball grinding mixing, drying, pelletize, pressing mold, gas pressure sintering
Tool material, this material not only has stable chemical property, excellent anti-wear performance, also have excellence fracture toughness, hardness,
Bending strength and heat resistance, it is possible to meet the needs that Practical Project uses, can be widely applied in mold materials.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (9)
1. a titanium boride base composite ceramic mold materials, it is characterised in that according to mass percent, by following components system
Become: titanium boride 50.0～58.0%, zirconium carbide 21.3～24%, silicon nitride 11.0～13.8%, terbia. Diterbium trioxide 1.0～1.8%, oxygen
Change thulium 3.2～3.8%, lithium carbonate 1.8～2.2%, aluminium carbide 1.6～2.0%, copper oxide 2.1～2.4%；Wherein titanium boride
By the nanometer titanium boride powder body that particle diameter is 5～15nm and micron titanium boride powder body that particle diameter is 15～25 μm according to mass ratio 1:
The ratio of 0.12～0.18 mixes；The particle diameter of zirconium carbide and silicon nitride is 15～25nm；Terbia. Diterbium trioxide and the grain of Dithulium trioxide
Footpath is 50～100nm；The particle diameter of lithium carbonate, aluminium carbide and copper oxide is 5～50nm.
Titanium boride base composite ceramic mold materials the most according to claim 1, it is characterised in that according to mass percent
Meter, is made up of following components: titanium boride 53.0～55.0%, zirconium carbide 22.5～23.5%, silicon nitride 12.0～12.5%, oxygen
Change terbium 1.3～1.5%, Dithulium trioxide 3.4～3.6%, lithium carbonate 1.9～2.1%, aluminium carbide 1.7～1.9%, copper oxide 2.2～
2.3%.
Titanium boride base composite ceramic mold materials the most according to claim 1, it is characterised in that according to mass percent
Meter, is made up of following components: titanium boride 54.0%, zirconium carbide 22.8%, silicon nitride 12.2%, terbia. Diterbium trioxide 1.4%, Dithulium trioxide
3.5%, lithium carbonate 2.0%, aluminium carbide 1.8%, copper oxide 2.3%.
4. a preparation method for the titanium boride base composite ceramic mold materials as described in claims 1 to 3 is arbitrary, its feature exists
In, comprise the following steps:
(1) weigh each material powder in proportion, load weighted powder is placed in ball grinder and carries out ball mill mixing, according to material: oxygen
Change zirconium ball: the mass ratio of dehydrated alcohol is that the ratio of 1:2～6:1～1.5 adds zirconia ball and dehydrated alcohol, utilizes planetary
Ball mill makes it fully mix, and ball milling speed is 400～500r/min, and Ball-milling Time is 8～12h；
(2) being placed in the powder that ball milling is good in the baking oven that temperature is 65～85 DEG C to heat and be evaporated, evaporation limit, limit is stirred, until anhydrous
Ethanol all volatilizees complete, then the compound after drying grinds, and sieves with 180～200 eye mesh screens；
(3) compound after sieving carries out pelletize by drying process with atomizing, then the powder body of pelletize is put into mould and carries out
Molding, obtains ceramic die biscuit finally by isostatic cool pressing technique；
(4) use two step thermal-insulating methods to carry out gas pressure sintering, specifically include following steps:
41) ceramic die biscuit is put into graphite crucible, carry out gas pressure sintering in a nitrogen atmosphere；
42) first it is warming up to 900～1000 DEG C with the heating rate of 10～15 DEG C/min；
43) continue to be warming up to 1300～1350 DEG C with the heating rate of 3～5 DEG C/min, and insulation 1～2h at this temperature；
44) then it is warming up to 1500～1550 DEG C with the heating rate of 3～5 DEG C/min, and insulation 2～5h at this temperature；
45) cool to less than 100 DEG C with the furnace, take out, obtain described titanium boride base composite ceramic mould.
The preparation method of titanium boride base composite ceramic mold materials the most according to claim 4, it is characterised in that described
In step (1), material: zirconia ball: the mass ratio of dehydrated alcohol is 1:5:1.2, ball milling speed is 450r/min, and Ball-milling Time is
10h。
The preparation method of titanium boride base composite ceramic mold materials the most according to claim 4, it is characterised in that described
In step (4), nitrogen atmosphere is the nitrogen of 1.5～10atm.
The preparation method of titanium boride base composite ceramic mold materials the most according to claim 6, it is characterised in that described
Step 42) in, nitrogen atmosphere is the nitrogen of 2atm；Described step 43) in, nitrogen atmosphere is the nitrogen of 4atm；Described step
Rapid 44), in, nitrogen atmosphere is the nitrogen of 6atm.
The preparation method of titanium boride base composite ceramic mold materials the most according to claim 4, it is characterised in that described
Step 43) in, it is warming up to 1320 DEG C with the heating rate of 3 DEG C/min, is incubated 2h.
The preparation method of titanium boride base composite ceramic mold materials the most according to claim 4, it is characterised in that described
Step 44) in, it is warming up to 1510～1535 DEG C with the heating rate of 5 DEG C/min, is incubated 4h.
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| EP0491949A1 (en) * | 1989-09-20 | 1992-07-01 | Kabushiki Kaisha Komatsu Seisakusho | Ceramic mold for molding glass member |
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| CN103058662A (en) * | 2013-01-31 | 2013-04-24 | 山东轻工业学院 | Titanium diboride-based composite self-lubricating ceramic tool material and preparation method thereof |
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|---|---|---|---|---|
| EP0491949A1 (en) * | 1989-09-20 | 1992-07-01 | Kabushiki Kaisha Komatsu Seisakusho | Ceramic mold for molding glass member |
| CN102531612A (en) * | 2010-12-15 | 2012-07-04 | 北京中材人工晶体研究院有限公司 | Silicon nitride material and preparation method of heat insulating disc cover prepared from same |
| CN103058662A (en) * | 2013-01-31 | 2013-04-24 | 山东轻工业学院 | Titanium diboride-based composite self-lubricating ceramic tool material and preparation method thereof |
| CN103145423A (en) * | 2013-04-01 | 2013-06-12 | 山东轻工业学院 | Nanometer-micrometer composite gradient self-lubricating ceramic tool material and preparation method thereof |
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