CN106399796A - Hard alloy as well as preparation method thereof and alloy tool bit - Google Patents
Hard alloy as well as preparation method thereof and alloy tool bit Download PDFInfo
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- CN106399796A CN106399796A CN201611162853.0A CN201611162853A CN106399796A CN 106399796 A CN106399796 A CN 106399796A CN 201611162853 A CN201611162853 A CN 201611162853A CN 106399796 A CN106399796 A CN 106399796A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
Abstract
The invention provides a hard alloy as well as a preparation method thereof and an alloy tool bit. The hard alloy comprises the following components in parts by weight: 87-94 parts of tungsten carbide, 9-12 parts of a binder and 0.4-2 parts of an inhibitor, wherein the inhibitor comprises tantalum carbide and niobium carbide. Compared with the prior art, the hard alloy provided by the invention has the advantages of effectively inhibiting tungsten carbide crystalline grains from growing up, controlling the grain size of tungsten carbide, improving containment capability and dispersity, on different alloy elements, of hard alloy and realizing synergistic effect through special dose of components by taking tantalum carbide and niobium carbide as the inhibitor, so that the hard alloy has high hardness and high strength. According to the experimental results, the alloy tool bit prepared by the hard alloy provided by the invention has hardness being 91 HRA-91.5HRA, and bending strength TRS not greater than 2400N/mm<2>.
Description
Technical field
The invention belongs to technical field of alloy material, more specifically, it is to be related to a kind of hard alloy and preparation method thereof
And alloy cutter head.
Background technology
Alloy cutter head is impact drill or the drill bit of electric hammer drill and the core component of rotary file, by hard alloy preparation processing
Become.The application of alloy cutter head is quite varied, such as the field such as the entity brick wall in broken stone, cement pavement or building or cement wall
Institute, processes steel beam column and foundry goods steel etc..And alloy cutter head is in actual application, especially in high intensity rock, steel beam column
And in the application process of steel-casting, easy fracture, this not only adds use cost, impact economic benefit, but also can be because more
Change alloy cutter head and reduce service efficiency.
At present, prior art is to improve the above-mentioned technical problem of alloy cutter head, prepares the hard of alloy cutter head by improvement
The toughness of alloy, makes alloy cutter head seldom rupture in use.But, above-mentioned improvement limits adding of alloying element
Enter amount, so that the hardness of alloy cutter head is affected.Therefore it provides a kind of alloy knife that can be provided simultaneously with preferable hardness and toughness
Head, can take into account the different demands of various applications, become those skilled in the art's technical problem urgently to be resolved hurrily.
Content of the invention
In view of this, it is an object of the invention to provide a kind of hard alloy and preparation method thereof and alloy cutter head, this
The hard alloy of bright offer has high rigidity and high intensity simultaneously.
The invention provides a kind of hard alloy, including following components：
Tungsten carbide 87 weight portion～94 weight portion；
Binding agent 9 weight portion～12 weight portion；
Inhibitor 0.4 weight portion～2 weight portion；
Described inhibitor includes ramet and niobium carbide.
Preferably, in described inhibitor, the mass ratio of ramet and niobium carbide is 1：(0.5～1.5).
Preferably, described binding agent includes one or more of cobalt powder, tungsten powder, nikel powder and molybdenum powder.
Present invention also offers a kind of preparation method of the hard alloy described in technique scheme, comprise the following steps：
A) tungsten carbide, binding agent and inhibitor are mixed, obtained compound；Described inhibitor includes ramet and carbon
Change tungsten；
B) compound that step a) obtains is suppressed successively and sintered, obtained hard alloy.
Preferably, described in step a), the process of mixing is specially：
A1) tungsten carbide, binding agent and inhibitor are carried out ball milling in ball-milling medium, obtain mixture；
A2) by step a1) mixture that obtains carries out successively sieving for the first time, is dried and sieves for the second time, mixed
Material.
Preferably, step a1) described in ball-milling medium be ethanol；The bulb diameter of described ball milling is 8mm～10mm；Described ball
The speed of mill is 35r/min～45r/min, and the time is 20h～50h.
Preferably, step a2) described in the mesh number sieved for the first time be 300 mesh～350 mesh；The described mesh sieving for the second time
Number is 55 mesh～65 mesh.
Preferably, the mode of compacting described in step b) is to mix glue laminated system；The pressure of described compacting is 3t～100t.
Preferably, the temperature of sintering described in step b) is 1430 DEG C～1480 DEG C, and the time is 10h～12h.
Present invention also offers a kind of alloy cutter head, the hard alloy described in technique scheme or technique scheme
The hard alloy that described preparation method obtains is prepared from.
The invention provides a kind of hard alloy and preparation method thereof and alloy cutter head, described hard alloy is included with the following group
Point：Tungsten carbide 87 weight portion～94 weight portion；Binding agent 9 weight portion～12 weight portion；Inhibitor 0.4 weight portion～2 weight portion；
Described inhibitor includes ramet and niobium carbide.Compared with prior art, the hard alloy that the present invention provides is with ramet and carbon
Change niobium collectively as inhibitor, not only effectively suppress tungsten carbide crystal grain to grow up, control the grain size of tungsten carbide additionally it is possible to lifting is hard
Matter alloy, to the pardon of different-alloy element and dispersibility, makes the component of specific consumption realize synergism, so that hard
Alloy has high rigidity and high intensity simultaneously.Test result indicate that, the alloy cutter head of the hard alloy preparation that the present invention provides is hard
Spend for 91HRA～91.5HRA, bending strength TRS is more than 2400N/mm2.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme is clearly and completely described it is clear that institute
The embodiment of description is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention,
The every other embodiment that those of ordinary skill in the art are obtained under the premise of not making creative work, broadly falls into this
The scope of bright protection.
The invention provides a kind of hard alloy, including following components：
Tungsten carbide 87 weight portion～94 weight portion；
Binding agent 9 weight portion～12 weight portion；
Inhibitor 0.4 weight portion～2 weight portion；
Described inhibitor includes ramet and niobium carbide.
In the present invention, described hard alloy includes tungsten carbide, binding agent and inhibitor.In the present invention, described hard
With tungsten carbide as key component, it has stable chemical property to alloy, is the basis that alloy has high rigidity and high intensity.?
In the present invention, described hard alloy includes the tungsten carbide of 87 weight portion～94 weight portions, preferably 90 weight portion～93.5 weight
Part.
In the present invention, described binding agent preferably includes one or more of cobalt powder, tungsten powder, nikel powder and molybdenum powder, more excellent
Elect one of cobalt powder and tungsten powder or two kinds, most preferably cobalt powder and tungsten powder as.In one preferred embodiment of the present invention, institute
Stating binding agent is cobalt powder and tungsten powder；The mass ratio of described cobalt powder and tungsten powder is preferably (8～9)：(1～3), more preferably (8.3～
9)：(1～2.8).In the present invention, described hard alloy includes the binding agent of 9 weight portion～12 weight portions, preferably 9.3 weights
Amount part～11.8 weight portion.
In the present invention, described inhibitor includes ramet and niobium carbide.In the present invention, using ramet and niobium carbide
Collectively as inhibitor, not only effectively suppress tungsten carbide crystal grain to grow up, control the grain size of tungsten carbide additionally it is possible to lifting hard closes
The golden pardon to different-alloy element and dispersibility, make the component of specific consumption realize synergism, so that hard alloy
There is high rigidity and high intensity simultaneously.In the present invention, in described inhibitor, the mass ratio of ramet and niobium carbide is preferably 1：
(0.5～1.5), more preferably 1：1.In the present invention, described hard alloy includes the inhibitor of 0.4 weight portion～2 weight portion,
It is preferably 1 weight portion～1.6 weight portion.
Present invention also offers a kind of preparation method of the hard alloy described in technique scheme, comprise the following steps：
A) tungsten carbide, binding agent and inhibitor are mixed, obtained compound；Described inhibitor includes ramet and carbon
Change tungsten；
B) compound that step a) obtains is suppressed successively and sintered, obtained hard alloy.
Tungsten carbide, binding agent and inhibitor are mixed by the present invention first, obtain compound.In the present invention, described
Tungsten carbide is the primary raw material of hard alloy, and it has stable chemical property, is the base that alloy has high rigidity and high intensity
Plinth.The present invention is not particularly limited to the source of described tungsten carbide, using commercial carbonized tungsten powder well known to those skilled in the art
?.In the present invention, the particle diameter of described tungsten carbide is preferably 0.9 μm～2.0 μm, more preferably 1 μm～1.49 μm.
In the present invention, described binding agent preferably includes one or more of cobalt powder, tungsten powder, nikel powder and molybdenum powder, more excellent
Elect one of cobalt powder and tungsten powder or two kinds, most preferably cobalt powder and tungsten powder as.In one preferred embodiment of the present invention, institute
Stating binding agent is cobalt powder and tungsten powder；The mass ratio of described cobalt powder and tungsten powder is preferably (8～9)：(1～3), more preferably (8.3～
9)：(1～2.8)；The particle diameter of described cobalt powder is preferably 1.9 μm～2.6 μm, more preferably 2 μm～2.5 μm；The grain of described tungsten powder
Footpath is preferably 1.9 μm～2.6 μm, more preferably 2 μm～2.5 μm.The present invention is not particularly limited to the source of described binding agent,
Commercial goods using above-mentioned cobalt powder well known to those skilled in the art, tungsten powder, nikel powder and molybdenum powder.
In the present invention, described inhibitor includes ramet and niobium carbide.In the present invention, ramet in described inhibitor
It is preferably 1 with the mass ratio of niobium carbide：(0.5～1.5), more preferably 1：1.The present invention does not have spy to the source of described inhibitor
Different restriction, using the commercial goods of above-mentioned carbonization tantalum powder well known to those skilled in the art and niobium carbide powder.In the present invention
In, the particle diameter of described ramet is preferably 0.9 μm～2.0 μm, more preferably 1 μm～1.49 μm；The particle diameter of described niobium carbide is excellent
Elect 0.9 μm～2.0 μm as, more preferably 1 μm～1.49 μm.
In the present invention, the mass ratio of described tungsten carbide, binding agent and inhibitor is (87～94)：(9～12)：(0.4～
2), more preferably (90～93.5)：(9.3～11.8)：(1～1.6).
In the present invention, the process of described mixing is preferably specially：
A1) tungsten carbide, binding agent and inhibitor are carried out ball milling in ball-milling medium, obtain mixture；
A2) by step a1) mixture that obtains carries out successively sieving for the first time, is dried and sieves for the second time, mixed
Material.
In the present invention, ball milling is carried out using wet-grinding technology and relative device；The present invention is not particularly limited to the equipment of described ball milling, adopts
With ball mill well known to those skilled in the art.In the present invention, described ball-milling medium is preferably ethanol, and the present invention is to this
It is not particularly limited.In the present invention, the bulb diameter of described ball milling is preferably 8mm～10mm.The present invention adopts above-mentioned ball milling to be situated between
Matter and ball, setting ratio of grinding media to material is 3：1, activity coefficient is 0.45～0.5, and liquid-solid ratio is 250mL/kg～350mL/kg.
In the present invention, the speed of described ball milling is preferably 35r/min～45r/min, more preferably 40r/min；Described
The time of ball milling is preferably 20h～50h, more preferably 30h～40h.
After obtaining described mixture, the mixture obtaining is carried out sieving for the first time, is dried and second by the present invention successively
Sieve, obtain compound.In the present invention, the mesh number that described first time sieves preferably 300 mesh～350 mesh, more preferably 320
Mesh.
In the present invention, the purpose of described drying is the ball-milling medium removing in mixture.In the present invention, described drying
Temperature be preferably 80 DEG C～82 DEG C, more preferably 81 DEG C；The time of described drying is preferably 15h～20h, more preferably 18h.
In the present invention, the described mode sieved for the second time preferably employs vibration screening；The described mesh number sieved for the second time
It is preferably 55 mesh～65 mesh, more preferably 60 mesh.
After obtaining described compound, the compound obtaining is suppressed and is sintered by the present invention successively, obtains hard alloy.
In the present invention, the mode of described compacting preferably mixes glue laminated system, specially：Compound is mixed with glue, be dried 5min～
40 mesh～50 mesh sieves excessively after 10min, re-dry 60min～80min, finally compressing.In the present invention, described glue is preferably
Buna；Described glue amount of mixing is preferably 90mL/kg～100mL/kg, more preferably 94mL/kg.The present invention is to described compacting
Equipment is not particularly limited, using reversible press well known to those skilled in the art.In the present invention, described compacting
Pressure is preferably 3t～100t, more preferably 10t～90t.
After completing described pressing process, the present invention will be compressing after compound be sintered, obtain hard alloy.?
In the present invention, the temperature of described sintering is preferably 1430 DEG C～1480 DEG C, more preferably 1450 DEG C～1460 DEG C；Described sintering
Time is preferably 10h～12h, more preferably 670min.
The present invention preferably also includes carrying out post processing to the hard alloy obtaining；Described post processing is preferably and is surface-treated.
The present invention is not particularly limited to the equipment of described surface treatment, using vertical sand blasting machine well known to those skilled in the art is
Can.In the present invention, the time of described surface treatment is preferably 10min～20min, more preferably 15min.
Present invention also offers a kind of alloy cutter head, the hard alloy described in technique scheme or technique scheme
The hard alloy that described preparation method obtains is prepared from.The present invention does not have special limit to the preparation method of described alloy cutter head
System, using mechanical processing technique well known to those skilled in the art.
The invention provides a kind of hard alloy and preparation method thereof and alloy cutter head, described hard alloy is included with the following group
Point：Tungsten carbide 87 weight portion～94 weight portion；Binding agent 9 weight portion～12 weight portion；Inhibitor 0.4 weight portion～2 weight portion；
Described inhibitor includes ramet and niobium carbide.Compared with prior art, the hard alloy that the present invention provides is with ramet and carbon
Change niobium collectively as inhibitor, not only effectively suppress tungsten carbide crystal grain to grow up, control the grain size of tungsten carbide additionally it is possible to lifting is hard
Matter alloy, to the pardon of different-alloy element and dispersibility, makes the component of specific consumption realize synergism, so that hard
Alloy has high rigidity and high intensity simultaneously.Test result indicate that, the alloy cutter head of the hard alloy preparation that the present invention provides is hard
Degree HRA is 91～91.5, and bending strength TRS is more than 2400N/mm2.
In addition, the preparation method process is simple of the hard alloy of present invention offer is it is easy to operate, suitable large-scale production.
In order to further illustrate the present invention, it is described in detail below by following examples.Used in following examples
Raw material be commercial goods.
Embodiment 1
(1) proportioning raw materials：Tungsten carbide 93.5 weight portion, cobalt powder 9 weight portion, tungsten powder 2 weight portion, ramet 0.8 weight portion,
Niobium carbide 0.8 weight portion；
Above-mentioned raw materials and ratio of grinding media to material are 3：1 ball of a diameter of 8mm～10mm, liquid-solid ratio are that the ethanol of 300mL/kg adds
Enter ball mill, activity coefficient is 0.45～0.5, and ball milling 45h, obtains mixture under 40r/min；
Said mixture is crossed 320 mesh sieves, at 81 DEG C, 18h is dried, in vibrated 60 mesh sieves, obtain compound.
(2) above-mentioned compound is mixed homogeneously with mixing the buna that glue amount is 94mL/kg, after 5min～10min is dried
Cross 40 mesh～50 mesh sieves, re-dry 60min～80min, then adopt reversible press compressing under 50t pressure, finally
Sinter 670min at 1455 DEG C, obtain hard alloy.
(3) adopt vertical sand blasting machine to be surface-treated 15min, machining is carried out according to different model, obtains alloy cutter head.
Using indentation method, the hardness of the alloy cutter head that the embodiment of the present invention 1 provides is tested, result shows, the present invention
The hardness of the alloy cutter head that embodiment 1 provides is 91.5HRA.
Using universal testing machine, the bending strength (TRS) of the alloy cutter head that the embodiment of the present invention 1 provides is tested, knot
Fruit shows, the bending strength (TRS) of the alloy cutter head that the embodiment of the present invention 1 provides is more than 2500.
Embodiment 2
(1) proportioning raw materials：Tungsten carbide 87 weight portion, cobalt powder 8.5 weight portion, tungsten powder 2.8 weight portion, ramet 0.5 weight
Part, niobium carbide 0.5 weight portion；
Above-mentioned raw materials and ratio of grinding media to material are 3：1 ball of a diameter of 8mm～10mm, liquid-solid ratio are that the ethanol of 300mL/kg adds
Enter ball mill, activity coefficient is 0.45～0.5, and ball milling 45h, obtains mixture under 40r/min；
Said mixture is crossed 320 mesh sieves, at 81 DEG C, 18h is dried, in vibrated 60 mesh sieves, obtain compound.
(2) above-mentioned compound is mixed homogeneously with mixing the buna that glue amount is 94mL/kg, after 5min～10min is dried
Cross 40 mesh～50 mesh sieves, re-dry 60min～80min, then adopt reversible press compressing under 50t pressure, finally
Sinter 670min at 1455 DEG C, obtain hard alloy.
(3) adopt vertical sand blasting machine to be surface-treated 15min, machining is carried out according to different model, obtains alloy cutter head.
Using indentation method, the hardness of the alloy cutter head that the embodiment of the present invention 2 provides is tested, result shows, the present invention
The hardness of the alloy cutter head that embodiment 2 provides is 91HRA.
Using universal testing machine, the bending strength (TRS) of the alloy cutter head that the embodiment of the present invention 2 provides is tested, knot
Fruit shows, the bending strength (TRS) of the alloy cutter head that the embodiment of the present invention 2 provides is more than 2400.
Embodiment 3
(1) proportioning raw materials：Tungsten carbide 90 weight portion, cobalt powder 8.3 weight portion, tungsten powder 1 weight portion, ramet 0.2 weight portion,
Niobium carbide 0.2 weight portion；
Above-mentioned raw materials and ratio of grinding media to material are 3：1 ball of a diameter of 8mm～10mm, liquid-solid ratio are that the ethanol of 300mL/kg adds
Enter ball mill, activity coefficient is 0.45～0.5, and ball milling 45h, obtains mixture under 40r/min；
Said mixture is crossed 320 mesh sieves, at 81 DEG C, 18h is dried, in vibrated 60 mesh sieves, obtain compound.
(2) above-mentioned compound is mixed homogeneously with mixing the buna that glue amount is 94mL/kg, after 5min～10min is dried
Cross 40 mesh～50 mesh sieves, re-dry 60min～80min, then adopt reversible press compressing under 50t pressure, finally
Sinter 670min at 1455 DEG C, obtain hard alloy.
(3) adopt vertical sand blasting machine to be surface-treated 15min, machining is carried out according to different model, obtains alloy cutter head.
Using indentation method, the hardness of the alloy cutter head that the embodiment of the present invention 3 provides is tested, result shows, the present invention
The hardness of the alloy cutter head that embodiment 3 provides is 91HRA.
Using universal testing machine, the bending strength (TRS) of the alloy cutter head that the embodiment of the present invention 3 provides is tested, knot
Fruit shows, the bending strength (TRS) of the alloy cutter head that the embodiment of the present invention 3 provides is more than 2400.
Comparative example 1
(1) proportioning raw materials：Tungsten carbide 90 weight portion, cobalt powder 8.6 weight portion, ramet 0.6 weight portion；
Above-mentioned raw materials and ratio of grinding media to material are 3：1 ball of a diameter of 8mm～10mm, liquid-solid ratio are that the ethanol of 300mL/kg adds
Enter ball mill, activity coefficient is 0.45～0.5, and ball milling 45h, obtains mixture under 40r/min；
Said mixture is crossed 320 mesh sieves, at 81 DEG C, 18h is dried, in vibrated 60 mesh sieves, obtain compound.
(2) above-mentioned compound is mixed homogeneously with mixing the buna that glue amount is 94mL/kg, after 5min～10min is dried
Cross 40 mesh～50 mesh sieves, re-dry 60min～80min, then adopt reversible press compressing under 50t pressure, finally
Sinter 670min at 1455 DEG C, obtain hard alloy.
(3) adopt vertical sand blasting machine to be surface-treated 15min, machining is carried out according to different model, obtains alloy cutter head.
Using indentation method, the hardness of the alloy cutter head that comparative example 1 provides is tested, result shows, comparative example 1 provides
Alloy cutter head hardness be 90HRA.
Using universal testing machine, the bending strength (TRS) of the alloy cutter head that comparative example 1 provides is tested, result table
Bright, the bending strength (TRS) of the alloy cutter head that comparative example 1 provides is more than 2200.
The described above of the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.Right
Multiple modifications of these embodiments will be apparent from for those skilled in the art, and as defined herein one
As principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will
Will not be intended to be limited to the embodiments shown herein, and be to fit to consistent with principles disclosed herein and features of novelty
Scope the widest.
Claims (10)
1. a kind of hard alloy, including following components：
Tungsten carbide 87 weight portion～94 weight portion；
Binding agent 9 weight portion～12 weight portion；
Inhibitor 0.4 weight portion～2 weight portion；
Described inhibitor includes ramet and niobium carbide.
2. hard alloy according to claim 1 it is characterised in that in described inhibitor ramet and niobium carbide quality
Than for 1：(0.5～1.5).
3. hard alloy according to claim 1 is it is characterised in that described binding agent includes cobalt powder, tungsten powder, nikel powder and molybdenum
One or more of powder.
4. a kind of preparation method of the hard alloy described in any one of claims 1 to 3, comprises the following steps：
A) tungsten carbide, binding agent and inhibitor are mixed, obtained compound；Described inhibitor includes ramet and carbonization
Tungsten；
B) compound that step a) obtains is suppressed successively and sintered, obtained hard alloy.
5. preparation method according to claim 4 is it is characterised in that the process of mixing described in step a) is specially：
A1) tungsten carbide, binding agent and inhibitor are carried out ball milling in ball-milling medium, obtain mixture；
A2) by step a1) mixture that obtains carries out successively sieving for the first time, is dried and sieves for the second time, obtains compound.
6. preparation method according to claim 5 is it is characterised in that step a1) described in ball-milling medium be ethanol；Described
The bulb diameter of ball milling is 8mm～10mm；The speed of described ball milling is 35r/min～45r/min, and the time is 20h～50h.
7. preparation method according to claim 5 is it is characterised in that step a2) described in the mesh number sieved for the first time be
300 mesh～350 mesh；The described mesh number sieved for the second time is 55 mesh～65 mesh.
8. preparation method according to claim 4 is it is characterised in that the mode of compacting described in step b) is to mix glue laminated
System；The pressure of described compacting is 3t～100t.
9. preparation method according to claim 4 it is characterised in that described in step b) sintering temperature be 1430 DEG C～
1480 DEG C, the time is 10h～12h.
10. a kind of alloy cutter head, the hard alloy described in any one of claims 1 to 3 or any one of claim 4～9 institute
The hard alloy that the preparation method stated obtains is prepared from.
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| CN108339986A (en) * | 2018-02-27 | 2018-07-31 | 辽宁科技大学 | The Nanometre grade tungsten carbide composite material and preparation method of micro drill addition nickel |
| CN112831705A (en) * | 2019-11-22 | 2021-05-25 | 森拉天时卢森堡有限公司 | Tungsten carbide based cemented hard material |
| CN114480937A (en) * | 2022-02-16 | 2022-05-13 | 河源富马硬质合金股份有限公司 | Multi-element tungsten carbide hard alloy material, drill bit and preparation method thereof |
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| CN102851522A (en) * | 2012-10-11 | 2013-01-02 | 株洲精五环硬质合金有限公司 | Preparation technique of wolfram carbide hard alloy |
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| CN1528933A (en) * | 2003-09-29 | 2004-09-15 | 株洲硬质合金集团有限公司 | Method for preparing tungsten-cobalt hard alloy |
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| CN108339986A (en) * | 2018-02-27 | 2018-07-31 | 辽宁科技大学 | The Nanometre grade tungsten carbide composite material and preparation method of micro drill addition nickel |
| CN112831705A (en) * | 2019-11-22 | 2021-05-25 | 森拉天时卢森堡有限公司 | Tungsten carbide based cemented hard material |
| CN114480937A (en) * | 2022-02-16 | 2022-05-13 | 河源富马硬质合金股份有限公司 | Multi-element tungsten carbide hard alloy material, drill bit and preparation method thereof |
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Effective date of registration: 20211231 Address after: 325612 Furong Town Industrial Zone, Yueqing City, Wenzhou City, Zhejiang Province Patentee after: ZHEJIANG DEWEI CEMENTED CARBIDE MANUFACTURING Co.,Ltd. Address before: 325612 Furong Town Industrial Zone, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: ZHEJIANG HONGFENG CEMENTED CARBIDE Co.,Ltd. |