CN103331442A - Nanometer binding agent, diamond-containing composite cutting tooth made from nanometer binding agent and manufacturing method of diamond-containing composite cutting tooth - Google Patents
Nanometer binding agent, diamond-containing composite cutting tooth made from nanometer binding agent and manufacturing method of diamond-containing composite cutting tooth Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 67
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 54
- 239000010432 diamond Substances 0.000 title claims abstract description 54
- 238000005520 cutting process Methods 0.000 title abstract description 14
- 239000011230 binding agent Substances 0.000 title abstract 8
- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 239000000843 powder Substances 0.000 claims abstract description 65
- 230000007704 transition Effects 0.000 claims abstract description 56
- 239000000956 alloy Substances 0.000 claims abstract description 31
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 31
- 238000005245 sintering Methods 0.000 claims abstract description 17
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims description 41
- 239000000203 mixture Substances 0.000 claims description 38
- 238000002156 mixing Methods 0.000 claims description 24
- 239000011159 matrix material Substances 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- 239000011733 molybdenum Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000000498 ball milling Methods 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical compound Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 230000035939 shock Effects 0.000 abstract description 4
- 238000005056 compaction Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000009489 vacuum treatment Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000011384 asphalt concrete Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000036346 tooth eruption Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 1
- 229910001573 adamantine Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
The invention discloses a nanometer binding agent, a diamond-containing composite cutting tooth made from the nanometer binding agent and a manufacturing method of the diamond-containing composite cutting tooth and belongs to the field of diamond and hard alloy composite materials. The nanometer binding agent is composed of, by weight, 95%-99% of Co powder, 0.5%-3% of TiC powder and 0.5%-2% Si powder. The diamond-containing composite cutting tooth made from the nanometer binding agent comprises a hard alloy ball tooth base body, a second transition layer, a first transition layer and a polycrystalline diamond layer, wherein the second transition layer, the first transition layer and the polycrystalline diamond layer are arranged on the base body in sequence, and the polycrystalline diamond layer is composed of, by weight, 93%-97% of diamond powder and 3%-7% of nanometer binding agent. The manufacturing method of the diamond-containing composite cutting tooth comprises the steps of assembly, pre-compaction, vacuum treatment and sintering under high temperature and high pressure. The nanometer binding agent is good at promoting sintering under high temperature and high pressure, and therefore the volume ratio of diamond in a glomerocryst layer is improved, abrasive resistance and shock resistance of the diamond-containing composite cutting tooth are improved, and the service life of the diamond-containing composite cutting tooth is prolonged.
Description
Technical field
The invention belongs to diamond and hard alloy composite material field, be specifically related to a kind of nano junction mixture, and the diamond composite cutter bit of being made by this bond.This composite cutter bit can be used as the cutting teeth of highway milling machine, is used for cutting old asphalt concrete road surface; Also can be used as the cutting teeth of coal-cutting machinery and road heading machinery, cut coal seam and rock stratum.The present invention also relates to the preparation method of diamond composite cutter bit simultaneously.
Background technology
What at present, the cutting teeth of various places highway milling machine generally used is the carbide alloy pick.Yet in the asphalt concrete pavement environment of complexity, the wearing and tearing of the tooth head of carbide alloy pick are very fast, and the easy rust of tooth head is mixed the road surface to pitch and is difficult to form effective cutting.At the failure mode of carbide alloy pick, can form to improve the wearability of tooth by the material that changes the cutting pick.Diamond is the highest material of present known hardness, the dimond synneusis composite cutter bit of being made by bortz powder interpolation adhesive has high strength, high rigidity, high-wearing feature, impact resistance and good self-sharpening, these good characteristics can enough be applied in the bituminous paving cutting, replace the carbide alloy pick.Facts have proved, dimond synneusis composite cutter bit with high abrasion, in the wearability of abrasion asphalt concrete pavement driving even reached several times to tens times of hard-metal insert, service life is when prolonging greatly, also reduce the replacing number of times of pick significantly, made operating efficiency significantly promote.
Summary of the invention
Purpose of the present invention aims to provide a kind of nano junction mixture and utilizes this bond dimond synneusis composite cutter bit that make, that be applicable to brokenly the road, and the preparation method that this composite cutter bit is provided is another object of the present invention.
Based on above-mentioned purpose, the present invention has taked following technical scheme:
A kind of nano junction mixture is made up of following raw materials in percentage by weight: Co powder 95～99%, TiC powder 0.5～3%, Si powder 0.5～2%.
The particle diameter of described TiC powder and Si powder is 35～40nm, and the particle diameter of described Co powder is 18～22nm.Select the raw material of this particle size range, be conducive to strengthen the wear-resisting and shock resistance of dimond synneusis composite cutter bit.Co powder, TiC powder, Si powder are preferably analyzed pure level in the bond.
A kind of diamond composite cutter bit of being made by described nano junction mixture, described composite cutter bit comprises the hard alloy spherical-teeth matrix and is successively set on the 2nd transition zone, the 1st transition zone and dimond synneusis layer on the matrix that wherein the raw material of dimond synneusis layer consists of: bortz powder 93～97 wt% and nano junction mixture 3～7wt%.Bortz powder is that the raw material of 15～35 μ m is good to select particle diameter.
The percentage by weight of each layer is: dimond synneusis layer 55～65%, the 1st transition zone 15～20% and the 2nd transition zone 20～25%.
The raw material of described the 1st transition zone consists of: bortz powder 55～65wt%, tungsten carbide powder 30～35wt%, nano junction mixture 5～10wt%, and wherein the bortz powder particle diameter is to be good between 8～12 μ m, the tungsten carbide powder particle diameter is good between 1.0～1.2 μ m.
The raw material of described the 2nd transition zone consists of: bortz powder 25～35wt%, tungsten carbide powder 55～60wt%, nano junction mixture 10～15wt%, and wherein the bortz powder preferable particle size is at the raw material of 4～6 μ m, and the tungsten carbide powder particle diameter is preferably between 1.4～2.0 μ m.
The raw material of described hard alloy spherical-teeth matrix consists of: tungsten carbide powder 86.5～87.5wt%, cobalt powder 12.5～13.5wt%.When the tungsten carbide powder particle diameter be 1.4～2.0 μ m, when the cobalt powder particle diameter is 1.0～1.2 μ m, effect is better.
The preparation method of described diamond composite cutter bit is characterized in that, may further comprise the steps:
1) assembling: with the raw material difference mixing of dimond synneusis layer, the 1st transition zone, the 2nd transition zone, the shop is gone in the spherical molybdenum cup successively then, puts into the hard alloy spherical-teeth matrix, buckles the molybdenum bowl cover, forms the complex assembly;
2) precompressed: the complex assembly is put into the pre-pressing mold of steel, place on the hydraulic press and suppress, pressure 10MPa;
3) application of vacuum: after the precompressed complex assembly is placed vacuum sintering furnace ,≤3 * 10
-4Handled 1.5～3 hours in 600～750 ℃ of insulations under the vacuum condition of Pa;
4) HTHP sintering: the complex assembly of application of vacuum is placed in the synthetic assembled block, is that 1400～1500 ℃, pressure are to synthesize 15～35min under the condition of 6～7GPa with cubic hinge press in temperature.
Among the described preparation method, utilize planetary ball mill that the raw material of dimond synneusis layer, the 1st transition zone, the 2nd transition zone is carried out mixing, the weight ratio of material and abrading-ball is 1: 1.5～3 during operation, charges into liquid nitrogen simultaneously in ball grinder, and the volume ratio of material and abrading-ball cumulative volume and liquid nitrogen is 1: 1; Planetary ball mill parameter: revolution 40～60 r/min, rotation 70～100 r/min, 5～20 hours ball milling time.
Among the described preparation method, earlier described nano junction mixture is placed hydrogen reducing furnace to reduce down at 600～750 ℃ before the batch mixing and handle 1.5～3h; Described diamond part is carried out purified treatment before the batch mixing: bortz powder is boiled 5～10min with 25～45% sodium hydrate aqueous solution earlier, boil 5～10min with chloroazotic acid again after being washed with distilled water to neutrality, the distilled water washing is to neutrality.
Nano junction mixture provided by the invention has good sintering facilitation under HTHP, can be combined with bortz powder well, form tough sintered body, help to improve adamantine volume ratio in the glomerocryst layer, strengthen wearability and the shock resistance of diamond composite cutter bit, prolong its service life.
The performance of diamond composite cutter bit aspect broken road of utilizing described nano junction mixture to make is especially remarkable, adopt gradient transitional lay to be connected between its hard alloy spherical-teeth matrix and the diamond layer, break through the technical bottleneck that existing composite cutter bit high-wearing feature and toughness can not get both, obtained all good dimond synneusis composite cutter bits of wearability and shock resistance.By the appropriate design to transition zone and sintered carbide ball teeth material, solve phenomenons such as the layering that causes owing to thermal conductivity factor, thermal coefficient of expansion and elastic modulus difference between dimond synneusis layer and the hard alloy substrate and crackle, strengthened the combination between dimond synneusis layer and the hard alloy spherical-teeth matrix.This composite cutter bit has high strength, high rigidity, high-wearing feature and good impact resistance and self-sharpening.
Simultaneously, the present invention also provides the preparation method of described diamond composite cutter bit.This method adopts high-temperature and high-pressure technique that diamond is compound on the sintered carbide ball tooth surface, formed the good diamond layer of wearability thereon, simultaneously, hard alloy substrate has good impact flexibility again, both complement each other, achieve the diamond composite cutter bit of performance brilliance, its cutting teeth as the highway milling machine can have been participated in the cutting of asphalt concrete pavement.
In the process of preparation composite cutter bit, for making the nano material batch mixing even, the present invention has taked to utilize the liquid nitrogen ball milling to carry out the technology of batch mixing at planetary ball mill, the interior powder of ball grinder is in the liquid flow regime of inertia all the time in the batch mixing process, make institute's grind materials more even, and can solve material and sink to the bottom and glue a jar problem.The batch mixing mechanism of star line ball mill is as follows: planetary ball mill is at a deep bid four carbide alloy ball milling jars to be housed, and what abrading-ball adopted is sintered carbide ball; When deep bid rotates (revolution), the mill jar is made spinning motion (revolution: from rotating ratio 1:2) at its revolution orbit, deep bid and ball grinder are when doing planetary motion, can do 360 ° of tipping bucket type upsets again in a solid space scope, powder is in the liquid flow regime of inertia all the time in ball grinder.
In addition, before the sintering complex assembly being carried out the vacuum high-temperature degassing and handle, is in order further to remove the volatile impurity in the composite powder, thoroughly to eliminate its adverse effect that dimond synneusis composite cutter bit sintering is produced of impurity.
Diamond composite cutter bit provided by the invention is by adopting the nano junction mixture in glomerocryst layer and transition zone prescription, and between hard alloy spherical-teeth matrix and diamond layer, adopt gradient transitional lay to be connected, broken through the technical bottleneck of diamond compact high-wearing feature and high impact-resistant toughness.Compare with existing diamond composite cutter bit, wear resistance ratio brings up to 37～420,000 by 25～300,000, and toughness is brought up to 410～450 joules by 250～300 joules; Heat endurance: 750 ℃ of roastings after 10 minutes, product abrasion is than 36～400,000,400～430 joules of toughness; Bring up to hard-metal insert 25 times or more by 10～15 times of hard-metal insert service life.
In addition, the present invention has also studied the microstructure of this dimond synneusis composite sheet, find to have the good binding performance between nano junction mixture and the diamond, illustrate that the nano material bond helps the one-tenth key density of (D-D key) between sintering and the raising diamond.
Description of drawings
Fig. 1 is the profile of diamond composite cutter bit of the present invention.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
A kind of nano junction mixture, formed by following raw materials in percentage by weight: the Co powder (18～22nm) 95%, the TiC powder (35～40nm) 3%, Si powder (35～40nm) 2%.
A kind of diamond composite cutter bit of being made by above-mentioned nano junction mixture as shown in Figure 1, comprises hard alloy spherical-teeth matrix 4 and is successively set on the 2nd transition zone 3, the 1st transition zone 2 and dimond synneusis layer 1 on the matrix 4.The percentage by weight of each layer is: dimond synneusis layer 55%, the 1st transition zone 20% and the 2nd transition zone 25%.The raw material of dimond synneusis layer consists of: bortz powder (15～35 μ m) 93 wt% and nano junction mixture 7wt%.The raw material of the 1st transition zone consists of: bortz powder (8～12 μ m) 55wt%, tungsten carbide powder (1.0～1.2 μ m) 35wt%, nano junction mixture 10wt%.The raw material of the 2nd transition zone consists of: bortz powder (4～6 μ m) 25wt%, tungsten carbide powder (1.4～2.0 μ m) 60wt%, nano junction mixture 15wt%.The raw material of hard alloy spherical-teeth matrix consists of: tungsten carbide powder (1.4～2.0 μ m) 86.5wt%, cobalt powder (1.0～1.2 μ m) 13.5wt%.
The preparation method of diamond composite cutter bit may further comprise the steps:
(1) pretreatment of raw material: earlier described nano junction mixture is placed hydrogen reducing furnace to reduce down at 750 ℃ before the batch mixing and handle 2h; Bortz powder is earlier boiled 5min with 35% sodium hydrate aqueous solution, boil 5min with chloroazotic acid again after being washed with distilled water to neutrality, the distilled water washing is to neutrality.
(2) batch mixing: respectively dimond synneusis layer, the 1st transition zone, the 2nd transition zone are prepared burden according to aforementioned formula, utilize planetary ball mill respectively raw material to be carried out mixing then, the weight ratio of material and carbide alloy abrading-ball (φ 5) is 1: 3 during operation, simultaneously charge into liquid nitrogen in ball grinder, the volume ratio of material and abrading-ball cumulative volume and liquid nitrogen is 1: 1; Planetary ball mill parameter: 50 r/min that revolve round the sun, rotation 100r/min, 20 hours ball milling time.
(3) assembling: with the raw material difference mixing of dimond synneusis layer, the 1st transition zone, the 2nd transition zone, the shop is gone in the spherical molybdenum cup successively then, puts into the hard alloy spherical-teeth matrix, buckles the molybdenum bowl cover, forms the complex assembly;
(4) precompressed: the complex assembly is put into the pre-pressing mold of steel, place on 100 t hydraulic press and suppress, pressure 10MPa;
(5) application of vacuum: after the precompressed complex assembly is placed vacuum sintering furnace ,≤3 * 10
-4Handled 2 hours in 700 ℃ of insulations under the vacuum condition of Pa;
(6) HTHP sintering: the complex assembly of application of vacuum is placed in the synthetic assembled block, is that 1450 ℃, pressure are to synthesize 20min under the condition of 6GPa with cubic hinge press in temperature.Cubic hinge press adopts six cylinder anisobaric modes (cylinder pressure is higher than horizontal cylinder pressure 5% up and down), and by pushing up the HTHP sintering that the hammer heating realizes complex up and down.
After tested, the main performance index of the diamond composite cutter bit that makes is: (1) composite cutter bit wear resistance ratio is 410,000,450 joules of toughness; (2) composite cutter bit heat endurance: product is behind 750 ℃ of following roasting 10min, and the composite sheet wear resistance ratio is 390,000,430 joules of toughness; (3) composite cutter bit is 27 times of hard-metal insert service life.
A kind of nano junction mixture, formed by following raw materials in percentage by weight: the Co powder (18～22nm) 99%, the TiC powder (35～40nm) 0.5%, Si powder (35～40nm) 0.5%.
A kind of diamond composite cutter bit of being made by above-mentioned nano junction mixture, comprise the hard alloy spherical-teeth matrix and be successively set on the 2nd transition zone, the 1st transition zone and dimond synneusis layer on the matrix, the percentage by weight of each layer is: dimond synneusis layer 65%, the 1st transition zone 15% and the 2nd transition zone 20%.The raw material of dimond synneusis layer consists of: bortz powder (15～35 μ m) 97 wt% and nano junction mixture 3wt%.The raw material of the 1st transition zone consists of: bortz powder (8～12 μ m) 65wt%, tungsten carbide powder (1.0～1.2 μ m) 30wt%, nano junction mixture 5wt%.The raw material of the 2nd transition zone consists of: bortz powder (4～6 μ m) 35wt%, tungsten carbide powder (1.4～2.0 μ m) 55wt%, nano junction mixture 10wt%.The raw material of hard alloy spherical-teeth matrix consists of: tungsten carbide powder (1.4～2.0 μ m) 87.5wt%, cobalt powder (1.0～1.2 μ m) 12.5wt%.
The preparation method of diamond composite cutter bit may further comprise the steps:
(1) pretreatment of raw material: earlier described nano junction mixture is placed hydrogen reducing furnace to reduce down at 600 ℃ before the batch mixing and handle 3h; Bortz powder is earlier boiled 10min with 25% sodium hydrate aqueous solution, boil 10min with chloroazotic acid again after being washed with distilled water to neutrality, the distilled water washing is to neutrality.
(2) batch mixing: respectively dimond synneusis layer, the 1st transition zone, the 2nd transition zone are prepared burden according to aforementioned formula, utilize planetary ball mill respectively raw material to be carried out mixing then, the weight ratio of material and carbide alloy abrading-ball (φ 5) is 1: 2 during operation, simultaneously charge into liquid nitrogen in ball grinder, the volume ratio of material and abrading-ball cumulative volume and liquid nitrogen is 1: 1; Planetary ball mill parameter: revolution 60r/min, rotation 80r/min, 6 hours ball milling time.
(3) assembling: with the raw material difference mixing of dimond synneusis layer, the 1st transition zone, the 2nd transition zone, the shop is gone in the spherical molybdenum cup successively then, puts into the hard alloy spherical-teeth matrix, buckles the molybdenum bowl cover, forms the complex assembly;
(4) precompressed: the complex assembly is put into the pre-pressing mold of steel, place on 100 t hydraulic press and suppress, pressure 10MPa;
(5) application of vacuum: after the precompressed complex assembly is placed vacuum sintering furnace ,≤3 * 10
-4Handled 3 hours in 600 ℃ of insulations under the vacuum condition of Pa;
(6) HTHP sintering: the complex assembly of application of vacuum is placed in the synthetic assembled block, is that 1500 ℃, pressure are to synthesize 15min under the condition of 6GPa with the cubic apparatus synthesis press in temperature.
The diamond composite cutter bit that present embodiment makes is tested, and main performance index is: (1) composite cutter bit wear resistance ratio is 400,000,430 joules of toughness; (2) composite cutter bit heat endurance: product is behind 750 ℃ of following roasting 10min, and the composite sheet wear resistance ratio is 38.5 ten thousand, 420 joules of toughness; (3) composite cutter bit is 26 times of hard-metal insert service life.
A kind of nano junction mixture, formed by following raw materials in percentage by weight: the Co powder (18～22nm) 97%, the TiC powder (35～40nm) 2%, Si powder (35～40nm) 1%.
A kind of diamond composite cutter bit of being made by above-mentioned nano junction mixture, comprise the hard alloy spherical-teeth matrix and be successively set on the 2nd transition zone, the 1st transition zone and dimond synneusis layer on the matrix, the percentage by weight of each layer is: dimond synneusis layer 60%, the 1st transition zone 18% and the 2nd transition zone 22%.The raw material of dimond synneusis layer consists of: bortz powder (15～35 μ m) 95 wt% and nano junction mixture 5wt%.The raw material of the 1st transition zone consists of: bortz powder (8～12 μ m) 60wt%, tungsten carbide powder (1.0～1.2 μ m) 32wt%, nano junction mixture 8wt%.The raw material of the 2nd transition zone consists of: bortz powder (4～6 μ m) 30wt%, tungsten carbide powder (1.4～2.0 μ m) 58wt%, nano junction mixture 12wt%.The raw material of hard alloy spherical-teeth matrix consists of: tungsten carbide powder (1.4～2.0 μ m) 87wt%, cobalt powder (1.0～1.2 μ m) 13wt%.
The preparation method of diamond composite cutter bit may further comprise the steps:
(1) pretreatment of raw material: earlier described nano junction mixture is placed hydrogen reducing furnace to reduce down at 700 ℃ before the batch mixing and handle 1.5h; Bortz powder is earlier boiled 8min with 45% sodium hydrate aqueous solution, boil 6min with chloroazotic acid again after being washed with distilled water to neutrality, the distilled water washing is to neutrality.
(2) batch mixing: respectively dimond synneusis layer, the 1st transition zone, the 2nd transition zone are prepared burden according to aforementioned formula, utilize planetary ball mill respectively raw material to be carried out mixing then, the weight ratio of material and carbide alloy abrading-ball (φ 5) is 1: 1.5 during operation, simultaneously charge into liquid nitrogen in ball grinder, the volume ratio of material and abrading-ball cumulative volume and liquid nitrogen is 1: 1; Planetary ball mill parameter: 40 r/min that revolve round the sun, rotation 70 r/min, 18 hours ball milling time.
(3) assembling: with the raw material difference mixing of dimond synneusis layer, the 1st transition zone, the 2nd transition zone, the shop is gone in the spherical molybdenum cup successively then, puts into the hard alloy spherical-teeth matrix, buckles the molybdenum bowl cover, forms the complex assembly;
(4) precompressed: the complex assembly is put into the pre-pressing mold of steel, place on 100 t hydraulic press and suppress, pressure 10MPa;
(5) application of vacuum: after the precompressed complex assembly is placed vacuum sintering furnace ,≤3 * 10
-4Handled 1.5 hours in 750 ℃ of insulations under the vacuum condition of Pa;
(6) HTHP sintering: the complex assembly of application of vacuum is placed in the synthetic assembled block, is that 1400 ℃, pressure are to synthesize 35min under the condition of 7GPa with the cubic apparatus synthesis press in temperature.
The diamond composite cutter bit that present embodiment makes is tested, and main performance index is: (1) composite cutter bit wear resistance ratio is 41.5 ten thousand, 420 joules of toughness; (2) composite cutter bit heat endurance: product is behind 750 ℃ of following roasting 10min, and the composite sheet wear resistance ratio is 40.5 ten thousand, 410 joules of toughness; (3) composite cutter bit is 25 times of hard-metal insert service life.
Claims (10)
1. a nano junction mixture is characterized in that, this bond is made up of following raw materials in percentage by weight: Co powder 95～99%, TiC powder 0.5～3%, Si powder 0.5～2%.
2. nano junction mixture as claimed in claim 1 is characterized in that, the particle diameter of described TiC powder and Si powder is 35～40nm, and the particle diameter of described Co powder is 18～22nm.
3. diamond composite cutter bit of being made by the described nano junction mixture of claim 1, described composite cutter bit comprises the hard alloy spherical-teeth matrix and is successively set on the 2nd transition zone, the 1st transition zone and dimond synneusis layer on the matrix, it is characterized in that the raw material of described dimond synneusis layer consists of: bortz powder 93～97 wt% and nano junction mixture 3～7wt%.
4. diamond composite cutter bit as claimed in claim 3 is characterized in that, the percentage by weight of each layer is: dimond synneusis layer 55～65%, the 1st transition zone 15～20% and the 2nd transition zone 20～25%.
5. diamond composite cutter bit as claimed in claim 4 is characterized in that, the raw material of described the 1st transition zone consists of: bortz powder 55～65wt%, tungsten carbide powder 30～35wt%, nano junction mixture 5～10wt%.
6. diamond composite cutter bit as claimed in claim 4 is characterized in that, the raw material of described the 2nd transition zone consists of: bortz powder 25～35wt%, tungsten carbide powder 55～60wt%, nano junction mixture 10～15wt%.
7. as the arbitrary described diamond composite cutter bit of claim 3-6, it is characterized in that the raw material of described hard alloy spherical-teeth matrix consists of: tungsten carbide powder 86.5～87.5wt%, cobalt powder 12.5～13.5wt%.
8. the preparation method of diamond composite cutter bit is characterized in that as described in arbitrary as claim 3-6, may further comprise the steps:
1) assembling: with the raw material difference mixing of dimond synneusis layer, the 1st transition zone, the 2nd transition zone, the shop is gone in the spherical molybdenum cup successively then, puts into the hard alloy spherical-teeth matrix, buckles the molybdenum bowl cover, forms the complex assembly;
2) precompressed: the complex assembly is put into the pre-pressing mold of steel, place on the hydraulic press and suppress, pressure 10MPa;
3) application of vacuum: after the precompressed complex assembly is placed vacuum sintering furnace ,≤3 * 10
-4Handled 1.5～3 hours in 600～750 ℃ of insulations under the vacuum condition of Pa;
4) HTHP sintering: the complex assembly of application of vacuum is placed in the synthetic assembled block, is that 1400～1500 ℃, pressure are to synthesize 15～35min under the condition of 6～7GPa with cubic hinge press in temperature.
9. as the preparation method of diamond composite cutter bit as described in the claim 7, it is characterized in that, utilize planetary ball mill that the raw material of dimond synneusis layer, the 1st transition zone, the 2nd transition zone is carried out mixing, the weight ratio of material and abrading-ball is 1: 1.5～3 during operation, simultaneously charge into liquid nitrogen in ball grinder, the volume ratio of material and abrading-ball cumulative volume and liquid nitrogen is 1: 1; Planetary ball mill parameter: revolution 40～60 r/min, rotation 70～100 r/min, 5～20 hours ball milling time.
10. as the preparation method of diamond composite cutter bit as described in the claim 8, it is characterized in that, earlier described nano junction mixture is placed before the batch mixing hydrogen reducing furnace 600～750 ℃ down reduction handle 1.5～3h; Described diamond part is carried out purified treatment before the batch mixing: bortz powder is boiled 5～10min with 25～45% sodium hydrate aqueous solution earlier, boil 5～10min with chloroazotic acid again after being washed with distilled water to neutrality, the distilled water washing is to neutrality.
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| CN105349965A (en) * | 2015-11-03 | 2016-02-24 | 富耐克超硬材料股份有限公司 | Polycrystalline diamond compact and manufacturing method thereof |
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| CN107442777B (en) * | 2017-07-24 | 2019-05-14 | 中南钻石有限公司 | A kind of hidden hole drilling polycrystalline diamond hard alloy composite ball tooth and preparation method thereof |
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| CN107598174A (en) * | 2017-10-12 | 2018-01-19 | 郑州博特硬质材料有限公司 | A kind of integral sintered polycrystalline diamond button and preparation method thereof |
| CN107598174B (en) * | 2017-10-12 | 2023-06-09 | 郑州博特硬质材料有限公司 | Integral sintered polycrystalline diamond ball tooth and preparation method thereof |
| CN112780273A (en) * | 2021-02-01 | 2021-05-11 | 武汉玖石超硬材料有限公司 | High-impact-resistance anti-falling polycrystalline diamond hard alloy pick head and manufacturing method thereof |
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