CN106271489A - A kind of carbide bit and manufacture method thereof - Google Patents
A kind of carbide bit and manufacture method thereof Download PDFInfo
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- CN106271489A CN106271489A CN201610755877.0A CN201610755877A CN106271489A CN 106271489 A CN106271489 A CN 106271489A CN 201610755877 A CN201610755877 A CN 201610755877A CN 106271489 A CN106271489 A CN 106271489A
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- ball milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
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Abstract
The invention discloses a kind of carbide bit and manufacture method thereof, comprise the following steps: S1, pre-treatment of raw material, impurity is rejected；S2, ball milling, utilize dielectric barrier discharge plasma (DBDP) auxiliary high-energy ball-milling method to prepare composite nano-powder；S3, compression molding, be pressed into rectangular-shaped green compact with the method for single way stempressing molding by the composite nano-powder after DBDP ball milling；S4, vacuum compacting green compact, in vacuum or low pressure, carburizing sintering becomes hard alloy block；S5, it is ground to cutter, goes desurfacing, then grind on diamond disk；Carry out evacuation ball milling, growing up of suppression crystal grain, on the basis of green compact, in vacuum or low pressure, carburizing sintering becomes hard alloy block, all carry out in vacuum during whole, the strict direction controlling grinding and stock removal, have the characteristics such as tough and tensile and elongation at break is high, and this production efficiency is greatly improved, hardness is improved, function admirable, convenient production process operation, cost is relatively low.
Description
Technical field
The present invention relates to hard alloy preparation technology field, be specifically related to a kind of carbide bit and manufacture method thereof.
Background technology
Hard alloy (cemented carbides, hardmetals), is with one or more high rigidity, dystectic
Metal carbides (WC, TiC etc.) are matrix, with the metals such as Co, Ni or its alloy as Binder Phase, use powder metallurgy process synthesis
Cermet material, be one of most typical alloy material of preparing of powder metallurgy, owing to hard alloy has more excellent
Point, has therefore obtained extremely wide application.
But during traditional powder metallurgy process synthesis hard alloy, impurity content is high, and poor toughness, internal structure is not
Stably, built on the sand, and generally require and take mould for a long time, low to the utilization rate of mould, cause comprehensive production cost
Height, production efficiency is low.
Summary of the invention
For problem above, the invention provides a kind of carbide bit and manufacture method thereof, few containing impurity, have
The characteristics such as tough and tensile and elongation at break is high, this production efficiency is greatly improved, and hardness is improved, and performance is excellent
Good, convenient production process operation, cost is relatively low, has excellent physical property, can effectively solve the problem in background technology.
To achieve these goals, the technical solution used in the present invention is as follows: a kind of carbide bit and manufacturer thereof
Method, comprises the following steps:
S1, pre-treatment of raw material, be carried out raw material, is rejected by the attachment pollutant on surface, recycles acid afterwards
Wash, reject the oxide on surface；
S2, ball milling, will put into ball grinder through pretreated raw material, utilize dielectric barrier discharge plasma
(DBDP) auxiliary high-energy ball-milling method prepares composite nano-powder；
S3, compression molding, load powder nano composite material in sintered-carbide die, with the side of single way stempressing molding
Composite nano-powder after DBDP ball milling is 1-1.8mm/min at compression rate by method, and maximum pressing pressure is 35kN
(160MPa), pressure hold time is pressed into rectangular-shaped green compact under conditions of being 5-10min；
Rectangular-shaped green compact are put in vacuum/pressurized sintering furnace, in vacuum or low pressure by S4, vacuum compacting green compact
Carburizing sintering becomes hard alloy block；
S5, it is ground to cutter, polishing should be first passed through, go desurfacing, then grind on diamond disk, finally re-use
Diamond paste is processed by shot blasting, makes four long faces all become minute surface.
According to technique scheme, in described step S2, before carrying out ball milling, add grain growth inhibitor, carrying out
Mechanical milling process carries out evacuation to ball grinder, is re-filled with the pressure argon slightly larger than 1bar, carries out ball grinds the most together
Powder.
According to technique scheme, in described step S2, after ball milling, cross 200 mesh sieves.
According to technique scheme, the sectional dimension of described sintered-carbide die is 26.44 × 8.6 millimeters.
According to technique scheme, in step s 4, it is placed in above graphite paper at green compact, and holding vacuum is 1Pa.
According to technique scheme, in step s 5, four long ribs should carry out 45° angle chamfered edge process, and each chamfered edge grinding
Direction must keep identical.
According to technique scheme, in step s 5, during grinding, each stock removal is not more than 0.01mm, and all polishing scratch
Direction equally should be parallel with sample length direction, the surface roughness Ra≤0.4um of four long.
Beneficial effects of the present invention:
The present invention first passes through dedoping step, is eliminated by impurity as far as possible, utilizes DBDP method to enter by ball grinder afterwards
Row evacuation ball milling, and pour protection gas in mechanical milling process, protection internal material is not by contaminating erosion, and at mechanical milling process
Middle addition grain growth inhibitor, growing up of suppression crystal grain, with the agent structure of little crystal grain composition hard alloy, at the base of green compact
On plinth, in vacuum or low pressure, carburizing sintering becomes hard alloy block, whole during all carry out in vacuum, reduce impurity
Enter, carry out grinding the most again, the strictest direction controlling grinding and stock removal, there is tough and tensile and elongation at break
High characteristic, this production efficiency is greatly improved, and hardness is improved, function admirable, production technology operation side
Just, cost is relatively low.
Accompanying drawing explanation
Fig. 1 is implementing procedure schematic diagram of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, to the present invention
It is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to
Limit the present invention.
Embodiment 1:
A kind of carbide bit and manufacture method thereof, a kind of carbide bit and manufacture method thereof, including following step
Rapid:
S1, pre-treatment of raw material, be carried out raw material, is rejected by the attachment pollutant on surface, recycles acid afterwards
Wash, reject the oxide on surface；
S2, ball milling, will put into ball grinder through pretreated raw material, utilize dielectric barrier discharge plasma
(DBDP) auxiliary high-energy ball-milling method prepares composite nano-powder；
S3, compression molding, load powder nano composite material in sintered-carbide die, with the side of single way stempressing molding
Composite nano-powder after DBDP ball milling is 1mm/min at compression rate by method, and maximum pressing pressure is 35kN (160MPa), pressure
The power retention time is to be pressed into rectangular-shaped green compact under conditions of 5min；
Rectangular-shaped green compact are put in vacuum/pressurized sintering furnace, in vacuum or low pressure by S4, vacuum compacting green compact
Carburizing sintering becomes hard alloy block；
S5, it is ground to cutter, polishing should be first passed through, go desurfacing, then grind on diamond disk, finally re-use
Diamond paste is processed by shot blasting, makes four long faces all become minute surface.
In described step S2, before carrying out ball milling, add grain growth inhibitor, to ball milling in carrying out mechanical milling process
Tank carries out evacuation, is re-filled with the pressure argon slightly larger than 1bar, carries out ball milling the most together powdered；Described step S2
In, after ball milling, cross 200 mesh sieves；The sectional dimension of described sintered-carbide die is 26.44 × 8.6 millimeters；In step s 4,
It is placed in above graphite paper at green compact, and holding vacuum is 1Pa；In step s 5, four long ribs should be carried out at 45° angle chamfered edge
Manage, and each chamfered edge grinding direction must keep identical；In step s 5, during grinding, each stock removal is not more than 0.01mm, and entirely
The direction of portion's polishing scratch equally should be parallel with sample length direction, the surface roughness Ra≤0.4um of four long.
Embodiment 2:
A kind of carbide bit and manufacture method thereof, a kind of carbide bit and manufacture method thereof, including following step
Rapid:
S1, pre-treatment of raw material, be carried out raw material, is rejected by the attachment pollutant on surface, recycles acid afterwards
Wash, reject the oxide on surface；
S2, ball milling, will put into ball grinder through pretreated raw material, utilize dielectric barrier discharge plasma
(DBDP) auxiliary high-energy ball-milling method prepares composite nano-powder；
S3, compression molding, load powder nano composite material in sintered-carbide die, with the side of single way stempressing molding
Composite nano-powder after DBDP ball milling is 1.4mm/min at compression rate by method, and maximum pressing pressure is 35kN (160MPa),
Pressure hold time is to be pressed into rectangular-shaped green compact under conditions of 7.5min；
Rectangular-shaped green compact are put in vacuum/pressurized sintering furnace, in vacuum or low pressure by S4, vacuum compacting green compact
Carburizing sintering becomes hard alloy block；
S5, it is ground to cutter, polishing should be first passed through, go desurfacing, then grind on diamond disk, finally re-use
Diamond paste is processed by shot blasting, makes four long faces all become minute surface.
In described step S2, before carrying out ball milling, add grain growth inhibitor, to ball milling in carrying out mechanical milling process
Tank carries out evacuation, is re-filled with the pressure argon slightly larger than 1bar, carries out ball milling the most together powdered；Described step S2
In, after ball milling, cross 200 mesh sieves；The sectional dimension of described sintered-carbide die is 26.44 × 8.6 millimeters；In step s 4,
It is placed in above graphite paper at green compact, and holding vacuum is 1Pa；In step s 5, four long ribs should be carried out at 45° angle chamfered edge
Manage, and each chamfered edge grinding direction must keep identical；In step s 5, during grinding, each stock removal is not more than 0.01mm, and entirely
The direction of portion's polishing scratch equally should be parallel with sample length direction, the surface roughness Ra≤0.4um of four long.
Embodiment 3:
A kind of carbide bit and manufacture method thereof, a kind of carbide bit and manufacture method thereof, including following step
Rapid:
S1, pre-treatment of raw material, be carried out raw material, is rejected by the attachment pollutant on surface, recycles acid afterwards
Wash, reject the oxide on surface；
S2, ball milling, will put into ball grinder through pretreated raw material, utilize dielectric barrier discharge plasma
(DBDP) auxiliary high-energy ball-milling method prepares composite nano-powder；
S3, compression molding, load powder nano composite material in sintered-carbide die, with the side of single way stempressing molding
Composite nano-powder after DBDP ball milling is 1.8mm/min at compression rate by method, and maximum pressing pressure is 35kN (160MPa),
Pressure hold time is to be pressed into rectangular-shaped green compact under conditions of 10min；
Rectangular-shaped green compact are put in vacuum/pressurized sintering furnace, in vacuum or low pressure by S4, vacuum compacting green compact
Carburizing sintering becomes hard alloy block；
S5, it is ground to cutter, polishing should be first passed through, go desurfacing, then grind on diamond disk, finally re-use
Diamond paste is processed by shot blasting, makes four long faces all become minute surface.
In described step S2, before carrying out ball milling, add grain growth inhibitor, to ball milling in carrying out mechanical milling process
Tank carries out evacuation, is re-filled with the pressure argon slightly larger than 1bar, carries out ball milling the most together powdered；Described step S2
In, after ball milling, cross 200 mesh sieves；The sectional dimension of described sintered-carbide die is 26.44 × 8.6 millimeters；In step s 4,
It is placed in above graphite paper at green compact, and holding vacuum is 1Pa；In step s 5, four long ribs should be carried out at 45° angle chamfered edge
Manage, and each chamfered edge grinding direction must keep identical；In step s 5, during grinding, each stock removal is not more than 0.01mm, and entirely
The direction of portion's polishing scratch equally should be parallel with sample length direction, the surface roughness Ra≤0.4um of four long.
According in mold process, the composite nano-powder change at compression rate and the difference of pressure hold time, obtain
Testing result as shown in the table:
As can be seen from the above table, along with composite nano-powder is in the increase of the change of compression rate, porosity is also gradually
Increase, and along with the prolongation of pressure hold time, tensile strength is also constantly increasing；This is because, when the change of compression rate
Gradually accelerating, the liquid through high pressure compressed can discharge suddenly the strongest ability, is splashed by molten metal, and wait and return less than liquid
Receiving and solidified, cause porosity to increase, and pressing time extends, using the teaching of the invention it is possible to provide the time of strong pressure is elongated, compacting is more preferably, anti-
Draw ability the strongest.
Based on above-mentioned, it is an advantage of the current invention that the present invention first passes through dedoping step, impurity eliminated as far as possible,
Utilize DBDP method to carry out evacuation ball milling by ball grinder afterwards, and in mechanical milling process, pour protection gas, protect internal material
Not by contaminating erosion, and in mechanical milling process, add grain growth inhibitor, growing up of suppression crystal grain, hard with little crystal grain composition
The agent structure of matter alloy, on the basis of green compact, in vacuum or low pressure, carburizing sintering becomes hard alloy block, whole process
In all carry out in vacuum, reduce the entrance of impurity, carry out grinding the most again, every time the strict direction controlling grinding and
Stock removal, has the characteristics such as tough and tensile and elongation at break is high, and this production efficiency is greatly improved, and hardness is carried
Height, function admirable, convenient production process operation, cost is relatively low.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (7)
1. a carbide bit and manufacture method thereof, it is characterised in that comprise the following steps:
S1, pre-treatment of raw material, be carried out raw material, is rejected by the attachment pollutant on surface, recycles pickling afterwards, pick
Oxide except surface；
S2, ball milling, will put into ball grinder through pretreated raw material, utilize dielectric barrier discharge plasma (DBDP) auxiliary
High-energy ball milling method is helped to prepare composite nano-powder；
S3, compression molding, load powder nano composite material in sintered-carbide die, and the method with single way stempressing molding will
Composite nano-powder after DBDP ball milling is 1-1.8mm/min at compression rate, and maximum pressing pressure is 35kN (160MPa), pressure
The power retention time is to be pressed into rectangular-shaped green compact under conditions of 5-10min；
Rectangular-shaped green compact are put in vacuum/pressurized sintering furnace, carbonization in vacuum or low pressure by S4, vacuum compacting green compact
Sinter hard alloy block into；
S5, it is ground to cutter, polishing should be first passed through, go desurfacing, then grind on diamond disk, finally re-use Buddha's warrior attendant
Stone abrasive pastes are processed by shot blasting, make four long faces all become minute surface.
A kind of carbide bit the most according to claim 1 and manufacture method thereof, it is characterised in that described step S2
In, before carrying out ball milling, add grain growth inhibitor, in carrying out mechanical milling process, ball grinder is carried out evacuation, be re-filled with
The pressure argon slightly larger than 1bar, carries out ball milling powdered the most together.
A kind of carbide bit the most according to claim 1 and manufacture method thereof, it is characterised in that described step S2
In, after ball milling, cross 200 mesh sieves.
A kind of carbide bit the most according to claim 1 and manufacture method thereof, it is characterised in that described hard alloy
The sectional dimension of mould is 26.44 × 8.6 millimeters.
A kind of carbide bit the most according to claim 1 and manufacture method thereof, it is characterised in that in step s 4,
It is placed in above graphite paper at green compact, and holding vacuum is 1Pa.
A kind of carbide bit the most according to claim 1 and manufacture method thereof, it is characterised in that in step s 5,
Article four, long rib should carry out 45° angle chamfered edge process, and each chamfered edge grinding direction must keep identical.
A kind of carbide bit the most according to claim 1 and manufacture method thereof, it is characterised in that in step s 5,
During grinding, each stock removal is not more than 0.01mm, and the direction of whole polishing scratch equally should be parallel with sample length direction, and four long
Surface roughness Ra≤the 0.4um in face.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610755877.0A CN106271489A (en) | 2016-08-29 | 2016-08-29 | A kind of carbide bit and manufacture method thereof |
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| CN201610755877.0A CN106271489A (en) | 2016-08-29 | 2016-08-29 | A kind of carbide bit and manufacture method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107553203A (en) * | 2017-10-10 | 2018-01-09 | 无锡华美钼业有限公司 | The molybdenum alloy sheet cutting machine of cutter cleaning case is set |
| CN110218924A (en) * | 2019-07-12 | 2019-09-10 | 河南工业大学 | A kind of preparation method of high-performance diamond sintered article |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107553203A (en) * | 2017-10-10 | 2018-01-09 | 无锡华美钼业有限公司 | The molybdenum alloy sheet cutting machine of cutter cleaning case is set |
| CN110218924A (en) * | 2019-07-12 | 2019-09-10 | 河南工业大学 | A kind of preparation method of high-performance diamond sintered article |
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