CN107127347B - The method that tooth is bored using base assembling sinter molding production - Google Patents
The method that tooth is bored using base assembling sinter molding production Download PDFInfo
- Publication number
- CN107127347B CN107127347B CN201710352328.3A CN201710352328A CN107127347B CN 107127347 B CN107127347 B CN 107127347B CN 201710352328 A CN201710352328 A CN 201710352328A CN 107127347 B CN107127347 B CN 107127347B
- Authority
- CN
- China
- Prior art keywords
- strip base
- gauge
- plycrystalline diamond
- base
- binder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
Abstract
The invention discloses a kind of methods for boring tooth using base assembling sinter molding production, specifically includes the following steps: 1) weigh each raw material by design requirement, mixing later respectively obtains gauge material, Transition Materials and the binder of the work material containing super-hard abrasive, the particle containing plycrystalline diamond；2) being fabricated to the work material containing super-hard abrasive and binder in the height direction has double-deck or three-decker drilling work strip base；The gauge material of the particle containing plycrystalline diamond is fabricated to plycrystalline diamond gauge strip base；3) each strip base of gained is pre-processed；4) the pretreated strip base of gained arrange die-filling, be sintered molding later；5) it is demoulded after sinter molding and carries out following process.The method of the invention suitability is strong, high degree of automation, by the brill dentine amount of this method production is stable, self-sharpening is strong, working face ingredient can required design arrange.
Description
Technical field
The present invention relates to a kind of brill tooth/drill bit production methods, and in particular to a kind of to assemble sinter molding system using base
The method for making to bore tooth.
Background technique
Diamond bit has nearly 60 years development courses in China, has been widely used in exploration, processing of stone, glass at present
Industries, a great variety, the scale topographies such as glass processing are different.In general, the production process of existing diamond bit is main are as follows: mixed
Material, assembling, sintering, following process.That there are manual operations is cumbersome for the production method of the traditional intermediate-frequency hot-pressing sintering of diamond bit,
The deficiencies of production cycle is long, quality of production artifical influence factor is high；Occurred in recent years first cold pressing bore gear blank block again row sintering
Production method since product category is various, there are mold versatilities it is low, die cost accounting is high the deficiencies of；And automatic cold-press bores tooth
Then there is the deficiencies of equipment cost height, mold poor universality, die change is at high cost in the briquet production method that row is sintered again.These
The deficiency of technique limits the development of diamond bit manufacturing enterprise, and it is necessary to develop a kind of adaptation under fierce market competition
Property it is strong, automation is high, is suitble to the low cost process method of flow line production.On the other hand, the brill tooth of prior art production has into
The disadvantages such as point uneven, unstable quality, working face component difference designability be low, cause product to harsh adaptability for working condition
Deficiency, target covering surface are narrow, this also requires further innovation technique, improved products.
Summary of the invention
Strong, high degree of automation that the technical problem to be solved in the present invention is to provide a kind of suitabilities is suitble to flow line production
A use bar base assembling sinter molding production method for boring tooth.By the brill dentine amount of this method production is stable, self-sharpening is strong, work
Face ingredient can required design arrangement.
The method of the present invention that tooth is bored using base assembling sinter molding production, comprising the following steps:
1) weigh each raw material by design requirement, later mixing, respectively obtain the work material containing super-hard abrasive, containing plycrystalline diamond it is broken
Gauge material, Transition Materials and the binder of grain；
2) be fabricated to the work material containing super-hard abrasive and binder has by working lining and combination in the height direction
The drilling work strip base of the double-layer structure of layer composition；Either by work material, Transition Materials and binder containing super-hard abrasive
It is fabricated to the drilling work strip base in the height direction with the three-decker being made of working lining, transition zone and binder course；
The gauge material of the particle containing plycrystalline diamond is fabricated to plycrystalline diamond gauge strip base；
3) gained drilling work strip base, plycrystalline diamond gauge strip base are carried out to include pre- place that is dry, deoxygenating restoring operation
Reason, obtains pretreated drilling work strip base and plycrystalline diamond gauge strip base；
4) the pretreated drilling work strip base of gained and plycrystalline diamond gauge strip base are arranged according to design requirement
It is die-filling, it is sintered molding later；
5) it is demoulded after sinter molding and carries out following process.
In the step 1) of the method for the invention, the gauge of the work material containing super-hard abrasive, the particle containing plycrystalline diamond
The composition and ratio of material, Transition Materials and binder, which can according to need, specifically to be designed, and is also possible in the prior art normal
Rule selection.
In the method for the invention, in order to make step 1) mix resulting various materials be easier in the next steps at
Assistant formation agent, the selection of assistant formation agent and dosage and existing skill are added in the mixing process preferably in step 1) for type
Art is identical, usually the composition of ethyl alcohol and glycerol, more specifically can be the group that ethyl alcohol and glycerol are formed with the volume ratio of 1-3:1
Close object.
In the step 2) of the method for the invention, when drilling work strip base be in its height direction with working lining,
When the three-decker of transition zone and binder course composition, it is mainly used in brill tooth and independently forms, also need to bore tooth later and be welded on
Occasion on matrix, working lining therein are the working portion for boring tooth for drilling, and binder course is then to weld with matrix
Part, transition zone are then between working lining and binder course, to realize the stress between working lining and binder course, brittleness, intensity
Deng gradually transition, reducing it, there is a situation where be broken.
In the step 2) of the method for the invention, each strip base can be used existing conventional method and be made, specifically can be with
It is artificial mechanism cold moudling, machine automatization cold moudling or extrusion forming etc..The shape of upper and lower two end faces of each strip base
It can according to need and be determined, specifically can be round, rectangular, triangle or abnormity.The upper surface of the strip base or under
The size of end face can be determined according to the size of the brill tooth of required production, it is generally the case that strip base upper surface or lower end surface
Area be 0.8-80mm2, the height of the strip base is usually 16-60mm.
In the step 3) of the method for the invention, pretreatment is usually carried out under the conditions of 80-300 DEG C, to realize each strip
The drying of base goes hydrogen reduction and except glue (in the case where being added to assistant formation agent when mixing) operation.The pretreated time
It determines as needed, usually 30-120min.
In the step 4) of the method for the invention, the die-filling basic principle of the arrangement is on boring the inside and outside diameter and arc surface of tooth
It uniformly arranges one or more layers of plycrystalline diamond gauge strip base, intermediate position is uniformly arranged with creeping into work strip base.
In sinter molding, can independently be sintered using tooth is bored or together with the molding mode of matrix integral sintering, when use is integrated
When sinter molding, addition assistant formation solder and mouth of a river filling auxiliary material can according to need, wherein assistant formation solder view bores tooth
Sintering character selectively addition to increase sintering strength, the addition of mouth of a river filling auxiliary material is then the firing at the completion mouth of a river to increase
Whole binding force.The sinter molding can pass through the modes sinter moldings such as intermediate-frequency hot-pressing sintering, vacuum heating-press sintering.
Compared with prior art, the present invention using first production base arrange on demand again die-filling sintering method production bore tooth,
The advantage is that:
1, no replacement is required the cold stamping die when making the brill tooth of dissimilar tooth form, it is versatile；
2, automation equipment production can be used in a base, and cost of labor is low, yield is high, is suitble to flow line production；
3, component difference design can be carried out on tooth working face by being arranged in bore on demand, labor aptitude is good, can design
Property is strong；
4, because manufacturing process automatic controlling level is high, the brill tooth of the method for the present invention production compares traditional handicraft component difference
Small, quality stability is good；The power that be combined with each other between bar base is on the weak side, is conducive to assist diamond exposure in the course of work, bores tooth from sharp
Property is good；
5, boring tooth gauge becomes plycrystalline diamond strip base layer gauge from traditional bulky grain plycrystalline diamond gauge, and gauge area coverage is big,
Gauge performance is outstanding.
Detailed description of the invention
Fig. 1 is the process flow diagram of 1 the method for the embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of embodiment of plycrystalline diamond gauge strip base in inventive embodiments 1；
Fig. 3 is that a kind of structural schematic diagram of embodiment of work strip base is crept into inventive embodiments 1；
Fig. 4 is the structural schematic diagram for creeping into work strip base another embodiment；
Fig. 5 is to bore tooth to be independently sintered die-filling structural schematic diagram；
Fig. 6 is the die-filling structural schematic diagram of drill bit integral sintering；
Fig. 7 is the enlarged drawing in Fig. 6 at A.
Figure label are as follows:
1 plycrystalline diamond gauge strip base；2 drilling work strip bases；2-1 working lining；2-2 binder course；2-3 transition zone；3 brill teeth are only
Vertical sintering graphite mold；4 matrixes；5 integral sintering graphite jigs；6 mouths of a river.
Specific embodiment
The present invention is described in further detail combined with specific embodiments below, content to better understand the invention, but
The present invention is not limited to following embodiments.
Embodiment 1: tooth independence sinter molding is bored
The method (boring tooth independence sinter molding) of tooth, process flow chart such as Fig. 1 institute are bored using base sinter molding production
Show, specifically includes the following steps:
1) each raw material is weighed by design requirement, is blended to obtain work material, the particle containing plycrystalline diamond containing super-hard abrasive respectively
Gauge material, Transition Materials and binder, and being made of ethyl alcohol and glycerol with the volume ratio of 1:1 in mixed middle incorporation conventional amount used
Assistant formation agent；The group of the work material containing super-hard abrasive, the gauge material of the particle containing plycrystalline diamond, Transition Materials and binder
At and proportion it is same as the prior art；When being applied to VI grades of granite, the specific formula of various powders is as follows:
1. the formula of the work material containing super-hard abrasive: 40wt%Fe+34wt%663Cu+10wt%Co+7wt%Ni+
4wt%CuSn15+5wt%Mn, super-hard abrasive are the diamond of 20% (grinding wheel concentration system).
2. the formula of the gauge material of the particle containing plycrystalline diamond: 40wt%Fe+38wt%663Cu+10wt%Co+7wt%Ni+
5wt%Mn, plycrystalline diamond particle concentration are 30% (grinding wheel concentration system).
3. the formula of binder: using the NEXT300 prealloy powder of French remex company；
4. the formula of Transition Materials: use the aforementioned 1. number powder and 3. number powder with the mixing of the mass ratio of 1:2 and
At.
2) the gauge material of the particle containing plycrystalline diamond is passed through into conventional extrusion forming (pressure 30-50MPa, pressure maintaining 3-5s) mode system
Being made upper and lower end face is circular plycrystalline diamond gauge strip base 1, as shown in Figure 2；By the work material containing super-hard abrasive, transition
Material and binder are fabricated to by conventional extrusion forming (pressure 20-30MPa, pressure maintaining 3-5s) to be had by work in the height direction
The three-decker and upper and lower end face for making layer 2-1, transition zone 2-3 and binder course 2-2 composition are circular drilling work strip base
2, as shown in Figure 4；In production drilling work strip base 2 and plycrystalline diamond gauge strip base 1, each strip base upper surface or lower end are controlled
The area in face is 10-20mm2, the height of each strip base is 16-60mm；The drilling work strip base 2, controls work therein
Make layer 2-1 (containing super-hard abrasive) highly between 10-50mm, between 3-5mm, binder course 2-2 height exists transition zone 2-3 height
Between 3-10mm.
3) work strip base 2 is crept into gained, plycrystalline diamond gauge strip base 1 carries out including drying, removing under the conditions of 100 DEG C
Glue, the pretreatment for deoxygenating restoring operation, time 60min obtain pretreated drilling work strip base 2 and plycrystalline diamond gauge item
Shape base 1；
4) pretreated drilling work strip base 2 and plycrystalline diamond gauge strip base 1 are carried out on the working face for boring tooth
The arrangement on demand of ingredient, wear particle concentration, base scale topography etc. is die-filling, wherein die-filling basic principle of arranging is is being wanted
The plycrystalline diamond gauge strip base 1 for one or two layers of uniformly arranging on the inside and outside diameter and arc surface of the brill odontoid of formation, intermediate position is to bore
It is uniformly arranged into work strip base 2；Be fitted into bore tooth independence sintering graphite mold 3 in complete sintering (900 DEG C of sintering temperature,
Sintering pressure 25MPa, heat-insulation pressure keeping time 5min), as shown in Figure 5；
5) it is demoulded after sinter molding and carries out following process.
The brill tooth made of the method for the invention bores it with conventional thermocompression diamond bit after forming drill bit
Into the Experimental Comparison of VI grades of granite, test result shows: the brill tooth of invention the method production is formed by the drilling of drill bit
Speed per hour reaches 4.66m/h, improves 41% compared with conventional thermocompression diamond bit (drilling speed per hour is 3.3m/h), the service life improves
20%, and caratloss reduces 30%.
Embodiment 2: it bores tooth and is formed together with matrix integral sintering
Embodiment 1 is repeated, unlike:
In step 1), the specific formula of each powder are as follows:
1. the formula of the work material containing super-hard abrasive: 40wt%Fe+18wt%663Cu+10wt%Co+7wt%Ni+
4wt%CuSn15+5wt%Mn, super-hard abrasive are the diamond of 20% (grinding wheel concentration system).
2. the formula of the gauge material of the particle containing plycrystalline diamond: 40wt%Fe+38wt%663Cu+10wt%Co+7wt%Ni+
5wt%Mn, plycrystalline diamond particle concentration are 30% (grinding wheel concentration system)；
3. the formula of binder: 40wt%Fe+18wt%663Cu+10wt%Co+7wt%Ni+4wt%CuSn15+
5wt%Mn；
In step 2), the work material containing super-hard abrasive and binder are fabricated to be had by working lining in the height direction
The double-layer structure and upper and lower end face that 2-1 and binder course 2-2 is formed are circular drilling work strip base 2, as shown in Figure 3；?
When production, the working lining 2-1 (containing super-hard abrasive) of control drilling work strip base 2 is highly between 10-50mm, binder course 2-2
Height is between 6-10mm；
In step 4), using tooth is bored together with the molding mode of 4 integral sintering of matrix, wherein integral sintering molding is as schemed
Shown in 6, specifically, matrix 4 and drilling work strip base 2 and plycrystalline diamond gauge strip base 1, the mouth of a river are filled into auxiliary material (after sintering
Form the mouth of a river 6) being fitted into completion sintering in integral sintering graphite jig 5, (980 DEG C of sintering temperature, sintering pressure 40MPa, keep the temperature
Dwell time 5min)；
In integral sintering molding, the formula of auxiliary material is filled at the mouth of a river are as follows: 40wt%Fe+18wt%663Cu+10wt%Co
+ 7wt%Ni+4wt%CuSn15+5wt%Mn.
Claims (7)
1. the method for boring tooth using base assembling sinter molding production, comprising the following steps:
1) each raw material is weighed by design requirement, later mixing, respectively obtains work material, the particle containing plycrystalline diamond containing super-hard abrasive
Gauge material, Transition Materials and binder；
2) being fabricated to the work material containing super-hard abrasive and binder in the height direction has by working lining (2-1) and combines
The drilling work strip base (2) of the double-layer structure of layer (2-2) composition；Either by work material, Transition Materials containing super-hard abrasive
Be fabricated to binder has three be made of working lining (2-1), transition zone (2-3) and binder course (2-2) in the height direction
The drilling work strip base (2) of layer structure；The gauge material of the particle containing plycrystalline diamond is fabricated to plycrystalline diamond gauge strip base (1)；
3) gained drilling work strip base (2), plycrystalline diamond gauge strip base (1) are carried out to include dry, deoxidation restoring operation pre-
Processing, obtains pretreated drilling work strip base (2) and plycrystalline diamond gauge strip base (1)；
4) the pretreated drilling work strip base (2) of gained and plycrystalline diamond gauge strip base (1) are arranged according to design requirement
Cloth is die-filling, is sintered molding later；
5) it is demoulded after sinter molding and carries out following process.
2. according to the method described in claim 1, it is characterized by: assistant formation is added during mixing in step 1)
Agent.
3. according to the method described in claim 2, it is characterized by: the assistant formation agent is the combination of ethyl alcohol and glycerol
Object.
4. according to the method described in claim 1, it is characterized by: upper and lower two end faces of each strip base are circle in step 2)
Shape, rectangular or triangle.
5. according to the method described in claim 1, it is characterized by: pretreatment carries out under the conditions of 80-300 DEG C in step 3).
6. according to the method described in claim 1, it is characterized by: in step 4), the die-filling basic principle of the arrangement be
It uniformly arranges on inside and outside diameter and arc surface one layer or more of plycrystalline diamond gauge strip base (1), intermediate position is to creep into work strip base (2)
Uniformly arranged.
7. according to the method described in claim 1, it is characterized by: when using integral sintering molding, being needed in step 4)
It adds the mouth of a river (6) and fills auxiliary material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710352328.3A CN107127347B (en) | 2017-05-18 | 2017-05-18 | The method that tooth is bored using base assembling sinter molding production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710352328.3A CN107127347B (en) | 2017-05-18 | 2017-05-18 | The method that tooth is bored using base assembling sinter molding production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107127347A CN107127347A (en) | 2017-09-05 |
| CN107127347B true CN107127347B (en) | 2018-12-11 |
Family
ID=59731862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710352328.3A Active CN107127347B (en) | 2017-05-18 | 2017-05-18 | The method that tooth is bored using base assembling sinter molding production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107127347B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1305324C (en) * | 1986-04-17 | 1992-07-21 | Sumitomo Electric Industries, Ltd. | Wire incrusted with abrasive grain and method for producing the same |
| CA1336387C (en) * | 1988-06-29 | 1995-07-25 | Madapusi Kande Keshavan | Rod for applying hard surfacing to a surface and method of making same |
| US5740872A (en) * | 1996-07-01 | 1998-04-21 | Camco International Inc. | Hardfacing material for rolling cutter drill bits |
| US6063502A (en) * | 1996-08-01 | 2000-05-16 | Smith International, Inc. | Composite construction with oriented microstructure |
| CN200952353Y (en) * | 2006-04-24 | 2007-09-26 | 阎冠欣 | Steel body type diamond composite sheet drill bit body |
| CN101053981B (en) * | 2007-05-16 | 2010-12-15 | 张小军 | Brazing-thermal pressing sintering diamond tool sectional block |
| CN201695954U (en) * | 2010-06-24 | 2011-01-05 | 中国地质大学（武汉） | High-sharp sintered diamond bit embedded with iron wires |
| CN103982139B (en) * | 2014-05-19 | 2016-06-08 | 中国有色桂林矿产地质研究院有限公司 | A kind of high carcass bores tooth and preparation method thereof |
| CN103953286B (en) * | 2014-05-19 | 2017-05-10 | 中国有色桂林矿产地质研究院有限公司 | Welded high-matrix diamond core bit and manufacturing method thereof |
-
2017
- 2017-05-18 CN CN201710352328.3A patent/CN107127347B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107127347A (en) | 2017-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102825254B (en) | Diamond bead string and manufacturing method thereof as well as rope saw without base body supporting layer | |
| RU2376442C2 (en) | Boring bit and method of its manufacture | |
| CN105886871A (en) | High-strength hard alloy with titanium carbide as main component and preparation method of high-strength hard alloy | |
| CN101512096A (en) | Integrated hinge assembly with spring biased prop arm | |
| CN102796933A (en) | High-entropy alloy binder phase-based nitrogen-containing hard alloy and preparation method thereof | |
| CN102828696A (en) | Iron-based diamond-impregnated bit for drilling in hard slipping foundation | |
| CN101198762A (en) | Earth-boring bits | |
| CN105312556A (en) | Ultrafine high-bending resistance alloy powder used for diamond tool and preparation method for ultrafine high-bending resistance alloy powder | |
| CN101509375A (en) | Inlaid diamond-cemented carbide strong wear resistant pick and producing technique thereof | |
| CN101905185B (en) | In-situ ceramic partially-reinforced composite material hammerhead for crusher and preparation method | |
| CN106392907A (en) | Method for quickly preparing dense and superhard grinding and drilling tool based on self-propagating reaction | |
| CN107127347B (en) | The method that tooth is bored using base assembling sinter molding production | |
| CN104388723B (en) | Granular gradient hard alloy prepared by a kind of liquid infiltration method and preparation method thereof | |
| CN101885069B (en) | Manufacturing method of powdery high-speed steel and structural steel bimetal composite material | |
| CN103028720B (en) | Manufacturing method of self-drilling anchor rod bit | |
| CN113445929A (en) | Enhanced hot-pressing columnar diamond complex impregnated bit and manufacturing method thereof | |
| CN110408828B (en) | Artificial diamond drill bit material, drill bit and production process thereof | |
| CN107812949A (en) | A kind of ring shaped tyre of welded type drill bit and preparation method thereof | |
| CN111778436A (en) | Method for preparing WC-Y2O3 binderless hard alloy by cold pressing-hot pressing sintering | |
| CN102230173B (en) | Full-coating cladding thread element for parallel double-screw extruder | |
| CN216446854U (en) | Reinforced hot-pressing column-shaped diamond complex impregnated bit | |
| CN114515833A (en) | Polycrystalline diamond compact with functionally gradient structure and preparation method thereof | |
| CN104148653B (en) | Manufacturing method of diamond compacts | |
| CN109420989A (en) | A kind of resin diamond grinding wheel and preparation method thereof | |
| CN102321837A (en) | High-hardness composite material for cutter and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |