CN101787479A - Hard alloy with net-shaped structure and method for preparing same - Google Patents
Hard alloy with net-shaped structure and method for preparing same Download PDFInfo
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Abstract
The invention discloses hard alloy with a net-shaped structure and a method for preparing the same. A certain quantity of granules of another high-hardness hard alloy are distributed on a net-shaped matrix of the low-hardness hard alloy, and the granules account for 70 and 90 percent of total weight of the hard alloy with a net-shaped structure, wherein the granules are formed by the following components in percent by weight: 3.5 to 6 percent of cobalt, less than 2 percent of TaC and the balance of WC; and after the hard alloy is solely pressed and sintered, the HRA is 87 to 89.5, and the Hc is 7 to 11.8kA/m. The preparation method comprises the following steps that: the granules in the hard alloy with the net-shaped structure are made by a common process, the slurry of the net-shaped matrix is prepared, and the granules; and the slurry are mixed, dried, pressed and sintered to prepare the hard alloy with the net-shaped structure, wherein the HRA of the prepared hard alloy with the net-shaped structure is 88.5 to 91, the Hc is 11 to 15kA/m, and the Com is 4.2 to 7.5 and 14.8 to 15.2g/cm<3>. When the hard alloy is used for preparing hard alloy spherical tooth, the hard alloy spherical tooth is suitable to be used for high-hardness and high-compactness rock strata, and compared with the service life of the conventional hard alloy spherical tooth, the service life of the hard alloy spherical tooth prepared by the hard alloy with the net-shaped structure of the invention is prolonged by over 15 percent.
Description
Technical field
The present invention relates to a kind of hard alloy with net-shaped structure, promptly microtexture has the Wimet of netted pattern, is specifically related to ball tooth Wimet material and preparation method thereof that a kind of microtexture has netted pattern.
Background technology
Ball tooth Wimet is a class high-performance abrasion-proof material that is prepared by powder metallurgy process by cobalt powder and tungsten-carbide powder, and the hardness of Yin Qigao, wear resistance and favorable shock resistance are widely used in fields such as rock drilling, probing.Its performance quality is directly connected to the service efficiency and the work-ing life of drills for stone.
The ball tooth with Wimet in use, countries in the world have formed comparatively unified standard of performance requirement gradually, and are as shown in table 1.
The conventional ball tooth of table 1 composition and the performance of Wimet
| Cobalt wt, % | ??WC??wt，％ | Hardness HRA | Porosity | Density g/cm 3 | Intensity MPa |
| ??6~8 | ??92~94 | ??89~91 | ??A04B02 | ??14.7~15.0 | ??＞2000 |
Conventional ball tooth is a kind of uniform texture with the microtexture of Wimet, and WC particle is uniform distribution on cobalt binder phase matrix.The result of use of hard alloy spherical-teeth in the medium ground of such material preparation is better, has replaced brazing sheet of hard alloy.But in high rigidity, high compactness rock stratum, not wear-resisting situation often occurs, work-ing life is shorter.
U.S. Pat 5880382 discloses a kind of cancellated hard alloy spherical-teeth material that has, and this alloy is the Wimet granule that distributing on pure cobalt-based body, so the toughness of alloy is better.Test in place shows that this structure can significantly improve the Wimet shock resistance, is applicable to the oilfield exploitation that requires high tenacity.But its wear resistance is lower, is not suitable for adopting in the mine alloy field.
Summary of the invention
The purpose of this invention is to provide a kind of mine hard alloy ball tooth and preparation method thereof with high-wearing feature, this alloy has cancellated typical pattern, suit to use in the rock stratum in high rigidity, compactness, can improve more than 15% work-ing life than conventional hard alloy spherical-teeth.
Hard alloy with net-shaped structure of the present invention is the another kind of high rigidity Wimet granule that is distributed with some amount on the netted matrix of the lower Wimet of hardness; Described granule shared part by weight in hard alloy with net-shaped structure is 70 ~ 90%; The hardness of described hard alloy with net-shaped structure is HRA88.5 ~ 91, Coercive Force Hc11 ~ 15kA/m, cobalt magnetic Com4.2～7.5, density 14.8～15.2g/cm
3
Described composition is: the weight percent of cobalt is 3.5 ~ 6%, and TaC is less than 2%, and surplus is WC; The Wimet preparation method suppresses separately routinely, the hardness behind the sintering is HRA90 ~ 92 for described granule, and Coercive Force Hc is 12 ~ 18kA/m.
The composition of described netted matrix is: the weight percent of cobalt is 6 ~ 10%, and TaC is less than 1%, and surplus is WC; The Wimet preparation method suppresses separately described matrix routinely, the hardness behind the sintering is HRA87 ~ 89.5, and Coercive Force Hc is 7 ~ 11.8kA/m.
Hard alloy with net-shaped structure of the present invention, its preparation method may further comprise the steps successively: according in the hard alloy with net-shaped structure composition and performance requriements, with raw material prepare burden, wet-milling, drying and screening, mix forming agent, granulation then, be prepared into granule; According to the composition and the performance requriements of netted matrix in the hard alloy with net-shaped structure, with raw material prepare burden, wet-milling, drying and screening, mix forming agent then, be prepared into slip; With weight percent be 70 ~ 90% granule mix 20～30min with slip; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is crossed 60 mesh sieves, then compacting; Carry out sintering at last, form hard alloy with net-shaped structure, sintering temperature: 1430 ~ 1460 ℃.
Hard alloy with net-shaped structure of the present invention, wherein the higher Wimet of hardness is as granule, the lower Wimet of hardness is as netted matrix, because the hardness of Wimet granule is higher, so wear resistance is good, and the low good toughness of the hardness of matrix, thereby reached the unification of high-wearing feature and high tenacity, be applied to make mine hard alloy ball tooth, have high wear resistance, solved hard alloy spherical-teeth in high rigidity rock stratum low problem in work-ing life.
Description of drawings
Fig. 1 is the microtexture photo (X500) of hard alloy with net-shaped structure of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1: ball tooth hard alloy with net-shaped structure material---F10 trade mark material and preparation method thereof.
F10 trade mark material is by A
#Material and B
#Material is composited, and is used to make the ball tooth, wherein A
#Material is used to prepare Wimet granule, B
#Material is used to prepare hard alloy substrate.Its composition and performance are as shown in table 2, and weight percent is 80: 20.
At first according to A in the table 2
#The composition of material requires batching, adopts the preparation method of conventional Wimet, after the batching, carries out wet-milling in the 300L ball mill that is:, and ratio of grinding media to material is 3: 1, and grinding medium is an alcohol, and dosage is 300mL/kg, wet-milling time 30 ~ 40h; Cross 400 eye mesh screens after the wet-milling, dry again, 80 ~ 95 ℃ of drying temperatures; Sieve after the drying, mix forming agent then, granulate.A
#Performance representative value behind the material quality sampling sintering is as shown in table 2,1450 ± 10 ℃ of sintering temperatures.
B
#The composition of material requires to see Table 2, and preparation technology and above-mentioned technology are basic identical, but what form after mixing forming agent is slip, and B does not granulate
#Performance representative value behind the material quality sampling sintering is as shown in table 2,1450 ± 10 ℃ of sintering temperatures.。
With weight percent be 80: 20 A
#Granule and B
#Slip mixes 20 ~ 30min; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is crossed 60 mesh sieves, then compacting; Carry out sintering at last, sintering temperature: 1440 ± 10 ℃.The performance representative value of its finished product---hard alloy with net-shaped structure F10 is as shown in table 2.
The composition of table 2 alloy and performance
| ??Co??％ | ??WC??％ | ??Com??％ | ??Hc??kA/m | ??HRA | ??TRS??MPa | |
| ??A # | ??5 | ??95 | ??4.7 | ??14 | ??91.2 | ??--- |
| ??Co??％ | ??WC??％ | ??Com??％ | ??Hc??kA/m | ??HRA | ??TRS??MPa | |
| ??B # | ??6.5 | ??93.5 | ??6.0 | ??10 | ??89.5 | ??--- |
| ??F10 | ??5.3 | ??94.7 | ??4.8 | ??13.2 | ??90.7 | ??3010 |
Embodiment 2: ball tooth hard alloy with net-shaped structure material---F20 trade mark material and preparation method thereof.
F20 trade mark material is by C
#Material and D
#Material is composited, and is used to make the ball tooth, wherein C
#Material is prepared as granule, D
#Material is prepared into slip.Its composition and performance are as shown in table 3, and weight percent is 80: 20.
At first according to C in the table 3
#Composition require batching, adopt the preparation method of conventional Wimet, that is: after the batching, in the 300L ball mill, carry out wet-milling, ratio of grinding media to material is 3: 1, grinding medium is an alcohol, dosage is 300mL/kg, wet-milling time 30 ~ 40h; Cross 400 eye mesh screens after the wet-milling, dry again, 80 ~ 95 ℃ of drying temperatures; Sieve after the drying, mix forming agent then, granulate.C
#Performance representative value behind the sampling sintering is as shown in table 3,1450 ± 10 ℃ of sintering temperatures.
D
#The composition of material requires to see Table 3, and preparation technology and above-mentioned technology are basic identical, but what form after mixing forming agent is slip, does not granulate.D
#Performance representative value behind the sampling sintering is as shown in table 3,1450 ± 10 ℃ of sintering temperatures.。
With weight percent be 80: 20 A
#Granule and B
#Slip mixes 20 ~ 30min; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is crossed 60 mesh sieves, then compacting; Carry out sintering at last, sintering temperature: 1450 ± 10 ℃.The performance representative value of its finished product---hard alloy with net-shaped structure F20 is as shown in table 3.
The composition of table 3 alloy and performance
| ??Co??％ | ??WC??％ | ??Com??％ | ??Hc??kA/m | ??HRA | ??TRS??MPa | |
| ??C# | ??6 | ??94 | ??5.7 | ??12 | ??90.1 | ??--- |
| ??D# | ??8.5 | ??91.5 | ??8.0 | ??8.7 | ??88.2 | ??--- |
| ??F20 | ??6.5 | ??93.5 | ??6.1 | ??11 | ??89.5 | ??3000 |
Embodiment 3: ball tooth hard alloy with net-shaped structure material---F30 trade mark material and preparation method thereof.
F30 trade mark material is by E
#Material and F
#Material is composited, and is used to make the ball tooth, wherein E
#Material is used to prepare Wimet granule, F
#Material is used to prepare the netted matrix of Wimet.Its composition and performance are as shown in table 4, and weight percent is 70: 30.
At first according to E in the table 4
#Composition require batching, adopt the preparation method of conventional Wimet, that is: after the batching, in the 300L ball mill, carry out wet-milling, ratio of grinding media to material is 3: 1, grinding medium is an alcohol, dosage is 300mL/kg, wet-milling time 30 ~ 40h; Cross 400 eye mesh screens after the wet-milling, dry again, 80 ~ 95 ℃ of drying temperatures; Sieve after the drying, mix forming agent then, granulate.A
#Performance representative value behind the sampling sintering is as shown in table 4,1450 ± 10 ℃ of sintering temperatures.
The composition of F# material requires to see Table 4, and preparation technology and above-mentioned technology are basic identical, but what form after mixing forming agent is slip, does not granulate.B
#Performance representative value behind the sampling sintering is as shown in table 4,1450 ± 10 ℃ of sintering temperatures.。
With weight percent be 70: 30 E
#Granule and F
#Slip mixing 2030min; Above-mentioned compound is dry in loft drier, 80 ~ 95 ℃ of drying temperatures; Mixture after the drying is crossed 60 mesh sieves, then compacting; Carry out sintering at last, sintering temperature: 1450 ± 10 ℃.The performance representative value of its finished product---hard alloy with net-shaped structure F30 is as shown in table 4.
The composition of table 4 alloy and performance
| ??Co??％ | ??WC??％ | ??Com??％ | ??Hc??kA/m | ??HRA | ??TRS??MPa | |
| ??E | ??5 | ??95 | ??4.7 | ??14 | ??91.2 | ??-- |
| ??F # | ??6.5 | ??93.5 | ??6.0 | ??10 | ??89.5 | ??-- |
| ??F30 | ??5.45 | ??94.55 | ??5.0 | ??12.2 | ??90.3 | ??3005 |
Implementation result:
The F10 of trial-production, F20, the described material of F30 material and table 1 has been carried out on-the-spot simultaneous test, and test-results is as shown in table 5.Table 5 data presentation, the alloy of the new material of reticulated structure has improved more than 15% work-ing life.
Table 5 alloy use properties simultaneous test
| Material | Rock hardness | Alloy rigidity HRA | Rock drilling drilling depth m | Raising in work-ing life rate % |
| ??F10 | ??f12~14 | ??90.7 | ??500 | ??32 |
| ??F20 | ??f12~14 | ??89.5 | ??410 | ??16 |
| ??F30 | ??f12~14 | ??90.3 | ??460 | ??22 |
| The contrast material | ??f12~14 | ??90.2 | ??390 |
Claims (4)
1. a hard alloy with net-shaped structure is characterized in that: the Wimet granule that is distributed with the another kind of high rigidity of some amount on the netted matrix of the lower Wimet of hardness; Described granule shared part by weight in hard alloy with net-shaped structure is 70～90%; The hardness of described netted Wimet is HRA88.5～91, Coercive Force Hc11～15kA/m, cobalt magnetic Com4.2～7.5, density 14.8～15.2g/cm
3
2. hard alloy with net-shaped structure as claimed in claim 1 is characterized in that: the weight percent of cobalt is 3.5～6% in described, and TaC is less than 2%, and surplus is WC; Described granule according to conventional Wimet preparation method suppress separately, hardness HRA behind the sintering is 90 ~ 92, Coercive Force Hc is 12～18kA/m.
3. hard alloy with net-shaped structure as claimed in claim 1 is characterized in that: the weight percent of cobalt is 6～10% in the described netted matrix, and TaC is less than 1%, and surplus is WC; Described netted matrix according to conventional Wimet preparation method suppress separately, hardness HRA behind the sintering is 87～89.5, Coercive Force Hc is 7～11.8kA/m.
4. the preparation method of hard alloy with net-shaped structure as claimed in claim 1, may further comprise the steps successively: according in the described hard alloy with net-shaped structure of claim 2 composition and performance requriements, with raw material prepare burden, wet-milling, drying and screening, mix forming agent, granulation then, be prepared into granule; According to the composition and the performance requriements of netted matrix in the described hard alloy with net-shaped structure of claim 3, with raw material prepare burden, wet-milling, drying and screening, mix forming agent then, be prepared into slip; With weight percent be 70～90% granule mix 20～30min with slip; Above-mentioned compound is dry in loft drier, 80～95 ℃ of drying temperatures; Mixture after the drying is crossed 60 mesh sieves, then compacting; Carry out sintering at last, form hard alloy with net-shaped structure, sintering temperature: 1430～1460 ℃.
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| CN105170986B (en) * | 2015-10-29 | 2017-02-08 | 西迪技术股份有限公司 | Gradient hard alloy, preparation method and cutting tooth head |
| CN105817619B (en) * | 2016-06-03 | 2018-10-09 | 广东工业大学 | With the composite cermet and the preparation method and application thereof that W/Re-B-Ni3Al-SiC alloys are wear-resisting phase |
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| CN106191498A (en) * | 2016-06-23 | 2016-12-07 | 浙江恒成硬质合金有限公司 | A kind of hard alloy with net-shaped structure preparation method |
| CN109249027A (en) * | 2018-08-22 | 2019-01-22 | 株洲欧科亿数控精密刀具股份有限公司 | A kind of hard alloy numerical control blade of layer structure and preparation method thereof |
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| CN111270121A (en) * | 2020-03-27 | 2020-06-12 | 赣州有色冶金研究所 | Preparation method and application of hard alloy with net-shaped structure |
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| CN111270121B (en) * | 2020-03-27 | 2021-01-05 | 赣州有色冶金研究所 | Preparation method and application of hard alloy with net-shaped structure |
| CN111286663B (en) * | 2020-03-27 | 2021-08-27 | 赣州有色冶金研究所有限公司 | High-strength high-hardness microcosmic segregation non-uniform-structure hard alloy and preparation method and application thereof |
| CN114752835A (en) * | 2022-03-18 | 2022-07-15 | 南京航空航天大学 | Ti (C, N) -based metal ceramic with honeycomb structure and preparation method thereof |
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