CN107500776A - A kind of polycrystalline CBN cutting tool material and preparation method thereof - Google Patents
A kind of polycrystalline CBN cutting tool material and preparation method thereof Download PDFInfo
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- CN107500776A CN107500776A CN201710709832.4A CN201710709832A CN107500776A CN 107500776 A CN107500776 A CN 107500776A CN 201710709832 A CN201710709832 A CN 201710709832A CN 107500776 A CN107500776 A CN 107500776A
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- boron nitride
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- 239000000463 material Substances 0.000 title claims abstract description 36
- 238000005520 cutting process Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 134
- 229910052582 BN Inorganic materials 0.000 claims abstract description 47
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000203 mixture Substances 0.000 claims abstract description 30
- 239000007767 bonding agent Substances 0.000 claims abstract description 27
- 239000002223 garnet Substances 0.000 claims abstract description 17
- -1 ytterbium aluminum Chemical compound 0.000 claims abstract description 17
- 235000013312 flour Nutrition 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 16
- 229910001928 zirconium oxide Inorganic materials 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 11
- UZLYXNNZYFBAQO-UHFFFAOYSA-N oxygen(2-);ytterbium(3+) Chemical compound [O-2].[O-2].[O-2].[Yb+3].[Yb+3] UZLYXNNZYFBAQO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910003454 ytterbium oxide Inorganic materials 0.000 claims abstract description 10
- 229940075624 ytterbium oxide Drugs 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 8
- 239000011812 mixed powder Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 238000001291 vacuum drying Methods 0.000 claims description 7
- 238000005554 pickling Methods 0.000 claims description 6
- 238000002490 spark plasma sintering Methods 0.000 claims description 6
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 230000019612 pigmentation Effects 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 206010013786 Dry skin Diseases 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 2
- GJNGXPDXRVXSEH-UHFFFAOYSA-N 4-chlorobenzonitrile Chemical compound ClC1=CC=C(C#N)C=C1 GJNGXPDXRVXSEH-UHFFFAOYSA-N 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical group [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention belongs to polycrystalline CBN cutting tool Material Field, discloses a kind of polycrystalline CBN cutting tool material and preparation method thereof.It is made up of the raw material of following weight percentage：Cubic boron nitride powder 30 ~ 95%, bonding agent 5 ~ 70%；The percentage by weight composition of the bonding agent is following composition a or composition b；Form a：Silica flour 2 ~ 40%, 0<Zirconium oxide≤20%, 0<YBAG ytterbium aluminum garnet or ytterbium oxide≤5%, surplus are SiC powder and Si3N4Powder；Wherein, SiC powder and Si3N4Powder is any weight proportion；Form b：Metal powder 1 ~ 10%, silica flour 1 ~ 30%, 0<Zirconium oxide≤20%, 0<YBAG ytterbium aluminum garnet or ytterbium oxide≤5%, surplus are SiC powder and Si3N4Powder；Wherein, the metal powder is the mixture of one or both of Ti powder, Al powder；SiC powder and Si3N4Powder is any weight proportion.PCBN hardness prepared by the present invention is high, and high-temperature behavior is excellent.
Description
Technical field
The invention belongs to polycrystalline CBN cutting tool Material Field, and in particular to a kind of polycrystalline CBN cutting tool material
Material and preparation method thereof.
Background technology
Cubic boron nitride cutting tool material has high hardness and wearability, stable chemical property, high oxidation resistance temperature,
It is particularly suitable for processing the ferrous alloy material that diamond cutter can not be processed, thus there is huge market potential.It is high in recent years
Speed cutting and the proposition and application of non lubricant oil cutting so that have higher requirement to the high-temperature behavior of cutter material.
The cubic boron nitride cutting tool material property of domestic production is relatively low, it is difficult to meets requirement, high performance cube of nitrogen
Change boron cutter material and rely primarily on import.Thus high performance cubic boron nitride cutting tool material is developed to have great importance.
The content of the invention
To improve the high-temperature stability and mechanical property of polycrystalline cubic boron nitride, the purpose of the present invention aims to provide a kind of poly-
Brilliant cubic boron nitride cutting tool material and preparation method thereof.
To achieve the above object, the technical scheme that the present invention takes is as follows：
A kind of polycrystalline CBN cutting tool material, is made up of the raw material of following weight percentage：
Cubic boron nitride powder 30 ~ 95%, bonding agent 5 ~ 70%；The percentage by weight composition of the bonding agent is following composition a
Or composition b；
Form a：Silica flour 2 ~ 40%, 0<Zirconium oxide≤20%, 0<YBAG ytterbium aluminum garnet or ytterbium oxide≤5%, surplus be SiC powder and
Si3N4Powder；Wherein, SiC powder and Si3N4Powder is any weight proportion；
Form b：Metal powder 1 ~ 10%, silica flour 1 ~ 30%, 0<Zirconium oxide≤20%, 0<YBAG ytterbium aluminum garnet or ytterbium oxide≤5%, it is remaining
Measure as SiC powder and Si3N4Powder；Wherein, the metal powder is the mixture of one or both of Ti powder, Al powder；SiC powder and
Si3N4Powder is any weight proportion.
Preferably, cubic boron nitride powder granularity is 0.1 ~ 100 μm, more preferably 0.5 ~ 15 μm.
Most preferably, it is made up of the raw material of following weight percentage：Cubic boron nitride powder 70%, bonding agent 30%；It is described vertical
Square boron nitride powder granularity is 1 ~ 8 μm；The percentage by weight composition of the bonding agent is following composition a or composition b；
Form a：Silica flour 10%, zirconium oxide 5%, YBAG ytterbium aluminum garnet or ytterbium oxide 0.5%, surplus are SiC powder and Si3N4Powder；Its
In, SiC powder and Si3N4The weight ratio of powder is 7: 3；
Form b：Metal powder 3%, silica flour 7%, zirconium oxide 5%, YBAG ytterbium aluminum garnet or ytterbium oxide 0.5%, surplus be SiC powder and
Si3N4Powder；Wherein, the metal powder is Ti powder；SiC powder and Si3N4The weight ratio of powder is 7: 3.
The preparation method of the polycrystalline CBN cutting tool material, comprises the following steps：
1. cubic boron nitride powder handling：Cubic boron nitride powder is subjected to pickling processes 2 ~ 4 with 10 ~ 20 mol/L hydrofluoric acid
H, the cubic boron nitride powder of pickling is centrifuged, first washes and is washed again with absolute ethyl alcohol alcohol, is then dried in vacuo；
2. batch mixing：Cubic boron nitride powder 1. bonding agent is handled with step after is mixed using dry pigmentation, or using wet mixing method
Mixing, processing is dried after wet mixing；
3. polycrystalline CBN cutting tool material is prepared using one kind in following three kinds of sintering methods：
High temperature and high pressure method：By step 2. in mixed powder be fitted into pyrophillite mould, then under conditions of 200 ~ 400 DEG C
It is dried in vacuo 20 ~ 40 min；Then pyrophillite mould is put into cubic hinge press, is 1200 ~ 1700 DEG C, pressure in temperature
To sinter 10 ~ 30 min under conditions of 4.5 ~ 7.5 GPa；
High-temperature low-pressure method：By step 2. in mixed powder be fitted into graphite jig, then graphite jig is put into hot pressing furnace,
It is 1200 ~ 1600 DEG C, sinters 10 ~ 50 min under conditions of the MPa of pressure 15 ~ 50 in temperature under inert atmosphere；
Spark plasma sintering method：By step 2. in mixed powder be fitted into graphite jig, using plasma discharging
Body Fast Sintering method, 1 ~ 30 min are sintered at 1200 ~ 1500 DEG C under vacuum or inert atmosphere conditions.
Preferably, step 1. in, the vacuum drying is 40 ~ 80 DEG C of 8 ~ 12 h of drying in vacuum drying chamber.
Preferably, in the c of step 3., vacuum pressure<10Pa.
Preferably, 2. step is：Cubic boron nitride powder 1. bonding agent and step are handled after is in two-dimentional ball mill
It is well mixed using wet mixing method, or is well mixed in three-dimensional material mixer using dry pigmentation or wet mixing method；Wine is added during wet mixing
Essence or water, processing is dried after wet mixing.
Preferably, when being mixed in two-dimentional ball mill, the gross weight and abrading-ball of bonding agent and cubic boron nitride powder
Weight ratio is 1: (1 ~ 3), mixing time are 4 ~ 8 h.
Preferably, step 2. in, after wet mixing, be put in 100 ~ 140 DEG C of 4 ~ 24 h of drying in drying box.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, PCBN hardness prepared by the present invention is high, and high-temperature behavior is excellent；
2nd, sintering process controllability is strong：The polycrystalline cubic boron nitride hardness prepared using high temperature and high pressure method is higher；It is low using high temperature
When platen press and spark plasma sintering method prepare polycrystalline cubic boron nitride, production efficiency is high, and has certain hardness；
3rd, can be very by adjusting the granularity and the proportioning of cubic boron nitride powder and bonding agent of raw material cubic boron nitride powder
Easily control the final performance of polycrystalline CBN cutting tool material.
Embodiment
Explanation, but the protection model of the present invention are further explained to technical scheme with reference to specific embodiment
Enclose and be not limited thereto.
Embodiment 1
A kind of polycrystalline CBN cutting tool material, is made up of the raw material of following weight percentage：
Cubic boron nitride powder 70%, bonding agent 30%；The cubic boron nitride powder granularity is 1 ~ 8 μm；The weight of the bonding agent
It is following composition a or composition b to measure percentage composition；
Form a：Silica flour 10%, zirconium oxide 5%, YBAG ytterbium aluminum garnet 0.5%, surplus are SiC powder and Si3N4Powder；Wherein, SiC powder and
Si3N4The weight ratio of powder is 7: 3；
Form b：Metal powder 3%, silica flour 7%, zirconium oxide 5%, YBAG ytterbium aluminum garnet 0.5%, surplus are SiC powder and Si3N4Powder；Wherein,
The all Ti powder of metal powder；SiC powder and Si3N4The weight ratio of powder is 7: 3.
Preparation method, comprise the following steps：
1. cubic boron nitride powder handling：Cubic boron nitride powder is subjected to the h of pickling processes 4 with 15 mol/L hydrofluoric acid, by acid
Washed cubic boron nitride powder centrifuges, and first washes and is washed again with absolute ethyl alcohol alcohol, then 80 DEG C of dryings in vacuum drying chamber
8 h；
2. batch mixing：Cubic boron nitride powder 1. bonding agent and step are handled after adds deionization hydromining in two-dimentional ball mill
It is well mixed with wet mixing method, the gross weight and abrading-ball weight ratio of bonding agent and cubic boron nitride powder are 1: 1, mixing time 6
H, 120 DEG C of 8 h of drying in drying box are put in after wet mixing；
3. prepare polycrystalline CBN cutting tool material using following high temperature and high pressure methods：
By step 2. in mixed powder be fitted into pyrophillite mould, 30 min are then dried in vacuo under conditions of 300 DEG C；
Then pyrophillite mould is put into cubic hinge press, 15 is sintered under conditions of temperature is 1400 DEG C, pressure is 5 GPa
min。
Embodiment 2
A kind of polycrystalline CBN cutting tool material, is made up of the raw material of following weight percentage：
Cubic boron nitride powder 90%, bonding agent 10%；The cubic boron nitride powder granularity is 8 ~ 15 μm；The bonding agent
Percentage by weight composition is following composition a or composition b；
Form a：Silica flour 15%, zirconium oxide 10%, YBAG ytterbium aluminum garnet 1%, surplus are SiC powder and Si3N4Powder；Wherein, SiC powder and
Si3N4The weight ratio of powder is 3: 7；
Form b：Metal powder 3%, silica flour 12%, zirconium oxide 10%, YBAG ytterbium aluminum garnet 1%, surplus are SiC powder and Si3N4Powder；Wherein,
The metal powder half is Ti powder, and half is Al powder；SiC powder and Si3N4The weight ratio of powder is 3: 7.
Preparation method is the same as embodiment 1.
Embodiment 3
A kind of polycrystalline CBN cutting tool material, is made up of the raw material of following weight percentage：
Cubic boron nitride powder 80%, bonding agent 20%；The cubic boron nitride powder granularity is 1 ~ 8 μm；The weight of the bonding agent
It is following composition a or composition b to measure percentage composition；
Form a：Silica flour 3%, zirconium oxide 20%, YBAG ytterbium aluminum garnet 5%, surplus are SiC powder and Si3N4Powder；Wherein, SiC powder and Si3N4
The weight ratio of powder is 5: 5；
Form b：Metal powder 1%, silica flour 2%, zirconium oxide 20%, YBAG ytterbium aluminum garnet 5%, surplus are SiC powder and Si3N4Powder；Wherein, institute
State all Al powder of metal powder；SiC powder and Si3N4The weight ratio of powder is 5: 5.
Preparation method is the same as embodiment 1.
Embodiment 4
A kind of polycrystalline CBN cutting tool material, the percentage by weight of raw material are formed with embodiment 1.
Preparation method, comprise the following steps：
1. cubic boron nitride powder handling：Cubic boron nitride powder is subjected to the h of pickling processes 4 with 15 mol/L hydrofluoric acid, by acid
Washed cubic boron nitride powder centrifuges, and first washes and is washed again with absolute ethyl alcohol alcohol, then 80 DEG C of dryings in vacuum drying chamber
8 h；
2. batch mixing：Cubic boron nitride powder 1. bonding agent and step are handled after adds water in two-dimentional ball mill and uses wet mixing
Method is well mixed, and gross weight and the abrading-ball weight ratio of bonding agent and cubic boron nitride powder are 1: 1, and mixing time is 6 h, wet mixing
120 DEG C of 8 h of drying in drying box are put in afterwards；
3. prepare polycrystalline CBN cutting tool material using following spark plasma sintering methods：
By step 2. in mixed powder be fitted into graphite jig, using spark plasma sintering method, vacuum condition（Pressure
Power<10Pa）Under 1400 DEG C sinter 20 min.
Reference examples 1
It is with the difference of embodiment 1：SiC powder in embodiment 1 is replaced using TiC, replaced with TiN in embodiment 1
Si3N4Powder, it is other with embodiment 1.
Reference examples 2
It is with the difference of embodiment 1：YBAG ytterbium aluminum garnet is free of in composition a and b, it is other with embodiment 1.
The performance data for the polycrystalline CBN cutting tool material that embodiment 1-4 and reference examples 1-2 are prepared is to such as
Following table.
As seen from the table：The composition of preparation method and raw material directly affects finally prepd polycrystalline CBN cutting tool material
The performance of material, but under the raw material composition of embodiment 1, the polycrystalline CBN cutting tool material prepared using high temperature and high pressure method
Performance is optimal.
Claims (10)
1. a kind of polycrystalline CBN cutting tool material, it is characterised in that be made up of the raw material of following weight percentage：
Cubic boron nitride powder 30 ~ 95%, bonding agent 5 ~ 70%；The percentage by weight composition of the bonding agent is following composition a
Or composition b；
Form a：Silica flour 2 ~ 40%, 0<Zirconium oxide≤20%, 0<YBAG ytterbium aluminum garnet or ytterbium oxide≤5%, surplus be SiC powder and
Si3N4Powder；Wherein, SiC powder and Si3N4Powder is any weight proportion；
Form b：Metal powder 1 ~ 10%, silica flour 1 ~ 30%, 0<Zirconium oxide≤20%, 0<YBAG ytterbium aluminum garnet or ytterbium oxide≤5%, it is remaining
Measure as SiC powder and Si3N4Powder；Wherein, the metal powder is the mixture of one or both of Ti powder, Al powder；SiC powder and
Si3N4Powder is any weight proportion.
2. polycrystalline CBN cutting tool material as claimed in claim 1, it is characterised in that：Cubic boron nitride powder granularity is
0.1~100μm。
3. polycrystalline CBN cutting tool material as claimed in claim 2, it is characterised in that：Cubic boron nitride powder granularity is
0.5~15μm。
4. polycrystalline CBN cutting tool material as claimed in claim 3, it is characterised in that：By the original of following weight percentage
Material is made：Cubic boron nitride powder 70%, bonding agent 30%；The cubic boron nitride powder granularity is 1 ~ 8 μm；The bonding agent
Percentage by weight composition is following composition a or composition b；
Form a：Silica flour 10%, zirconium oxide 5%, YBAG ytterbium aluminum garnet or ytterbium oxide 0.5%, surplus are SiC powder and Si3N4Powder；Wherein,
SiC powder and Si3N4The weight ratio of powder is 7: 3；
Form b：Metal powder 3%, silica flour 7%, zirconium oxide 5%, YBAG ytterbium aluminum garnet or ytterbium oxide 0.5%, surplus are SiC powder and Si3N4
Powder；Wherein, the metal powder is Ti powder；SiC powder and Si3N4The weight ratio of powder is 7: 3.
5. a kind of preparation method of such as any one polycrystalline CBN cutting tool material of claim 1 ~ 4, its feature exist
In：Comprise the following steps：
1. cubic boron nitride powder handling：Cubic boron nitride powder is subjected to pickling processes 2 ~ 4 with 10 ~ 20 mol/L hydrofluoric acid
H, the cubic boron nitride powder of pickling is centrifuged, first washes and is washed again with absolute ethyl alcohol, is then dried in vacuo；
2. batch mixing：Cubic boron nitride powder 1. bonding agent is handled with step after is mixed using dry pigmentation, or using wet mixing method
Mixing, processing is dried after wet mixing；
3. polycrystalline CBN cutting tool material is prepared using one kind in following three kinds of sintering methods：
A, high temperature and high pressure method：
By step 2. in mixed powder be fitted into pyrophillite mould, then under conditions of 200 ~ 400 DEG C vacuum drying 20 ~
40 min；Then pyrophillite mould is put into cubic hinge press, temperature be 1200 ~ 1700 DEG C, pressure be 4.5 ~ 7.5
10 ~ 30 min are sintered under conditions of GPa；
B, high-temperature low-pressure method：
By step 2. in mixed powder be fitted into graphite jig, then graphite jig is put into hot pressing furnace, under inert atmosphere
It is 1200 ~ 1600 DEG C, sinters 10 ~ 50 min under conditions of the MPa of pressure 15 ~ 50 in temperature；
C, spark plasma sintering method：
By step 2. in mixed powder be fitted into graphite jig, using spark plasma sintering method, vacuum or inertia
Under atmospheric condition 1 ~ 30 min is sintered at 1200 ~ 1500 DEG C.
6. preparation method as claimed in claim 5, it is characterised in that：Step 1. in, the vacuum drying is vacuum drying chamber
8 ~ 12 h of interior 40 ~ 80 DEG C of dryings.
7. preparation method as claimed in claim 5, it is characterised in that：In the c of step 3., vacuum pressure<10Pa.
8. preparation method as claimed in claim 5, it is characterised in that 2. step is：1. bonding agent and step are handled after
Cubic boron nitride powder is well mixed in two-dimentional ball mill using wet mixing method, or in three-dimensional material mixer using dry pigmentation or
Wet mixing method is well mixed；Alcohol or water are added during wet mixing, processing is dried after wet mixing.
9. preparation method as claimed in claim 8, it is characterised in that：When being mixed in two-dimentional ball mill, bonding agent with
The gross weight of cubic boron nitride powder is 1 with abrading-ball weight ratio: (1 ~ 3), mixing time are 4 ~ 8 h.
10. the preparation method as described in claim 5 or 8 or 9, it is characterised in that：Step 2. in, after wet mixing, be put in drying
100 ~ 140 DEG C of 4 ~ 24 h of drying in case.
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| CN108838393A (en) * | 2018-09-01 | 2018-11-20 | 芜湖德加智能科技有限公司 | A kind of compound PCBN blade and preparation method thereof |
| CN108838392A (en) * | 2018-09-01 | 2018-11-20 | 芜湖德加智能科技有限公司 | Whole PC BN blade binder and preparation method thereof |
| CN109023168A (en) * | 2018-09-01 | 2018-12-18 | 芜湖德加智能科技有限公司 | Compound PCBN blade and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108838393A (en) * | 2018-09-01 | 2018-11-20 | 芜湖德加智能科技有限公司 | A kind of compound PCBN blade and preparation method thereof |
| CN108838392A (en) * | 2018-09-01 | 2018-11-20 | 芜湖德加智能科技有限公司 | Whole PC BN blade binder and preparation method thereof |
| CN109023168A (en) * | 2018-09-01 | 2018-12-18 | 芜湖德加智能科技有限公司 | Compound PCBN blade and preparation method thereof |
| CN108838393B (en) * | 2018-09-01 | 2020-08-18 | 芜湖乾凯材料科技有限公司 | Composite PCBN blade and preparation method thereof |
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