CN107042576A - Sinter cutter and its processing method - Google Patents
Sinter cutter and its processing method Download PDFInfo
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- CN107042576A CN107042576A CN201710189046.6A CN201710189046A CN107042576A CN 107042576 A CN107042576 A CN 107042576A CN 201710189046 A CN201710189046 A CN 201710189046A CN 107042576 A CN107042576 A CN 107042576A
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- cutter
- sintering
- sintering cutter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
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- Structural Engineering (AREA)
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Abstract
The present invention relates to one kind sintering cutter and its processing method.The processing method includes providing sintering cutter；And subzero treatment is carried out to sintering cutter, subzero treatment includes：At room temperature, to be not higher than 1 °F/min speed, the temperature for sintering cutter is down to 300~280 °F, and keeps being no less than 8 hours；Then again to be not higher than 1 °F/min speed, the temperature for sintering cutter is warmed to room temperature.By carrying out subzero treatment to sintering cutter finished product, on the premise of physical dimension and material is not changed, sintering cutter interior stress, extension sintering cutter life can be eliminated.
Description
Technical field
The present invention relates to tool sharpening field, more particularly to a kind of sintering cutter and its processing method.
Background technology
Polycrystalline cubic boron nitride (PCBN, Polycrystalline Cubic Boron Nitride) is after artificial diamond
After stone, a kind of artificial synthesized novel super-hard cutter material, its hardness is only second to diamond, in cutting and grinding pin processing
It is the current most suitable cutter material of high-speed cutting Ferrious material to extensive use.The making side of polycrystalline cubic boron nitride cutting
Method mainly has two kinds：One kind is a polymerization, i.e., directly once aggregated into cubic boron nitride (CBN) densely sintered
Body；Another is after polymerization method, first synthesizes high density cubic boron nitride, then high through high temperature by raw material of cubic boron nitride again
Pressure sinters polycrystalline cubic boron nitride into.
Polycrystalline cubic boron nitride cutting has the defect do not grown in the life-span in actual use.
The content of the invention
The present invention is intended to provide a kind of longer sintering cutter of life-span and its processing method.
A kind of processing method for sintering cutter, including：
Sintering cutter is provided；
Subzero treatment is carried out to sintering cutter, including：At room temperature, to be not higher than 1 °F/min speed, cutter will be sintered
Temperature be down to -300~-280 °F, and keep being no less than 8 hours；Then again to be not higher than 1 °F/min speed, knife will be sintered
The temperature of tool is warmed to room temperature.
In one of the embodiments, the sintering cutter is polycrystalline CBN cutting tool, and the offer sinters cutter
The step of include sintered to form polycrystalline CBN cutting tool with cubic boron nitride.
In one of the embodiments, the sintering cutter is answering for polycrystalline cubic boron nitride cutting and hard alloy substrate
The step of zoarium, offer sintering cutter, includes being sintered to form polycrystalline cubic boron nitride cutting with cubic boron nitride, and will be poly-
Brilliant cubic boron nitride blade and carbide by sintering process formation complex.
In one of the embodiments, in the step of carrying out subzero treatment to sintering cutter, including：At room temperature, with
0.5-0.7 °F/min speed, is down to -300~-290 °F, and kept for 12~18 hours by the temperature for sintering cutter；Then again
With 0.5-0.7 °F/min speed, the temperature for sintering cutter is warmed to room temperature.
In one of the embodiments, the sintering cutter is hard alloy cutter, the step of offer sinters cutter
Sinter to form hard alloy cutter using the hard compounds and binding metal of refractory metal.
In one of the embodiments, in the step of carrying out subzero treatment to sintering cutter, including：At room temperature, with
0.6-0.9 °F/min speed, is down to -300~-280 °F, and kept for 9~12 hours by the temperature for sintering cutter；Then again with
0.6-0.9 °F/min speed, the temperature for sintering cutter is warmed to room temperature.
One kind sintering cutter, is made up of above-mentioned processing method.
Above-mentioned sintering cutter and its processing method are not changing structure chi by carrying out subzero treatment to sintering cutter finished product
On the premise of very little and material, sintering cutter interior stress, extension sintering cutter life can be eliminated.
Embodiment
The sintering cutter machining method that one embodiment of the invention is provided, subzero treatment is remake to the sintering cutter of finished product, with
Make sintering cutter interior stress elimination, and size and material are unchanged, at the same time, can also improve mechanical tenacity and wear-resisting
Property.The sintering cutter can be polycrystalline CBN cutting tool or hard alloy cutter, can also be and closed by hard
The complex cutter that auri body is sintered with polycrystalline cubic boron nitride cutting.
In one specific embodiment, the sintering cutter is polycrystalline CBN cutting tool.Polycrystalline CBN cutting tool can
Using a polymerization, directly once to aggregate into densely sintered cutter with cubic boron nitride in a mold.It is integral sintered
Polycrystalline CBN cutting tool because without cemented carbide substrate, therefore thermal diffusivity, toughness is all more preferable.But also because being sintered directly into
Shape, therefore its inner element is more active, distribution it is little uniform.By that can arrange molecule after carrying out subzero treatment to sintering cutter
What is arranged is more uniform, and mechanical tenacity and wearability are improved, and subzero treatment does not influence to sinter the size and material of cutter.
The subzero treatment include at room temperature, to be not higher than 1 °F/min speed, by sinter cutter temperature be down to-
300~-280 °F, and keep being no less than 8 hours；Then again to be not higher than 1 °F/min speed, the temperature liter of cutter will be sintered
To room temperature.
In one embodiment, in the step of carrying out subzero treatment to sintering cutter, in room temperature, (25 DEG C or so, can be 20
DEG C or 22 DEG C) under, with 0.5-0.7 °F/min speed, by the temperature for sintering cutter be down to -300~-290 °F (-
184 DEG C~-178 DEG C), and kept for 12~18 hours；Then the temperature of cutter will be sintered with 0.5-0.7 °F/min speed again
It is warmed to room temperature.
Experiments verify that, the sintering cutter after this subzero treatment is compared to the sintering cutter without subzero treatment, life-span
Improve 30%.
Above-mentioned processing method is also applied for the complex cutter of hard alloy substrate and polycrystalline cubic boron nitride cutting.It is compound
The preparation of body cutter can first provide hard alloy substrate, then polycrystalline cubic boron nitride cutting sintered on hard alloy substrate and
Into.Hard alloy substrate can be formed using refractory metal hard compounds with binding metal sintering.In one embodiment, hard is closed
Auri body can be provided by following steps：By refractory metal hard compounds (tungsten carbide, ramet etc.), binding metal (cobalt powder or
Nickel powder) and a small amount of additive (stearic acid or Yi Suomin) pass through dispensing, mixed and ground in hexanes trituration medium, add
The slurry of paraffin, then vacuum dried (or spray drying), sieving, granulation, are made and mix wax compound；Wax compound will be mixed again to exist
High-precision pressed compact is made by compacting in mould；Hard alloy substrate is made through vacuum dewaxing and sintering or low pressure sintering in pressed compact.
Found through experiment, above-mentioned technological principle is applied equally to hard alloy cutter.
Hard alloy cutter can be prepared using the technical process that above-mentioned hard alloy substrate is made, only final direct
Integrally sintering is formed by hard alloy for the profile of cutter, the i.e. matrix and blade of cutter needed for being formed.Specifically, hard alloy
Cutter can be provided by following steps：By refractory metal hard compounds (tungsten carbide, ramet etc.), binding metal (cobalt powder or nickel
Powder) and a small amount of additive (stearic acid or Yi Suomin) pass through dispensing, mixed and ground in hexanes trituration medium, add stone
The slurry of wax, then vacuum dried (or spray drying), sieving, granulation, are made and mix wax compound；Wax compound will be mixed again in mould
High-precision pressed compact is made by compacting in tool；Hard alloy cutter is made through vacuum dewaxing and sintering or low pressure sintering in pressed compact.
In one embodiment, following subzero treatment can be carried out to above-mentioned hard alloy cutter：At room temperature, with 0.6-0.9 °
F/min speed, the temperature of hard alloy cutter is down to -300~-280 °F (- 184 DEG C~-174 DEG C), and keeps 9~12
Hour；Then the temperature of hard alloy cutter is warmed to room temperature with 0.6-0.9 °F/min speed again.
Experiments verify that, the hard alloy cutter after this subzero treatment is compared to the carbide cutter tool without subzero treatment
Tool, the life-span improves 20%.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (7)
1. a kind of processing method for sintering cutter, it is characterised in that including：
Sintering cutter is provided；
Subzero treatment is carried out to sintering cutter, including：At room temperature, to be not higher than 1 °F/min speed, the temperature of cutter will be sintered
Degree is down to -300~-280 °F, and keeps being no less than 8 hours；Then again to be not higher than 1 °F/min speed, cutter will be sintered
Temperature is warmed to room temperature.
2. the processing method of sintering cutter according to claim 1, it is characterised in that the sintering cutter is polycrystalline cubic
The step of boron nitride cutter, offer sintering cutter, includes being sintered to form polycrystalline CBN cutting tool with cubic boron nitride.
3. the processing method of sintering cutter according to claim 1, it is characterised in that the sintering cutter is polycrystalline cubic
The step of complex of boron nitride blade and hard alloy substrate, offer sintering cutter, includes sintering shape with cubic boron nitride
Complex is formed into polycrystalline cubic boron nitride cutting, and by polycrystalline cubic boron nitride cutting and carbide by sintering process.
4. the processing method of the sintering cutter according to Claims 2 or 3, it is characterised in that deep cooling is carried out to sintering cutter
In the step of processing, including：At room temperature, with 0.5-0.7 °F/min speed, the temperature for sintering cutter is down to -300~-
290 °F, and kept for 12~18 hours；Then the temperature for sintering cutter is warmed to room temperature with 0.5-0.7 °F/min speed again.
5. the processing method of sintering cutter according to claim 1, it is characterised in that the sintering cutter is hard alloy
The step of cutter, offer sintering cutter, sinters to form hard using the hard compounds and binding metal of refractory metal
Alloy cutter.
6. the processing method of sintering cutter according to claim 5, it is characterised in that subzero treatment is carried out to sintering cutter
The step of in, including：At room temperature, with 0.6-0.9 °F/min speed, the temperature for sintering cutter is down to -300~-280 °
F, and kept for 9~12 hours；Then the temperature for sintering cutter is warmed to room temperature with 0.6-0.9 °F/min speed again.
7. one kind sintering cutter, it is characterised in that be made up of the processing method described in claim 1-6 any one.
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| CN201710189046.6A CN107042576A (en) | 2017-03-27 | 2017-03-27 | Sinter cutter and its processing method |
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| CN201710189046.6A CN107042576A (en) | 2017-03-27 | 2017-03-27 | Sinter cutter and its processing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115386814A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for improving hardness of polycrystalline cubic boron nitride product |
| CN115385722A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for prolonging cutting life of polycrystalline cubic boron nitride cutter |
| CN115386846A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Pretreatment process for improving performance of coated hard alloy tool |
| CN115385723A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for improving mechanical property of Sialon ceramic product |
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|---|---|---|---|---|
| CN115386814A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for improving hardness of polycrystalline cubic boron nitride product |
| CN115385722A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for prolonging cutting life of polycrystalline cubic boron nitride cutter |
| CN115386846A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Pretreatment process for improving performance of coated hard alloy tool |
| CN115385723A (en) * | 2021-05-24 | 2022-11-25 | 山东理工大学 | Method for improving mechanical property of Sialon ceramic product |
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