CN104646674A - Method for manufacturing wear-resistant part by compounding diamond with metal blank body and product produced by same - Google Patents
Method for manufacturing wear-resistant part by compounding diamond with metal blank body and product produced by same Download PDFInfo
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- CN104646674A CN104646674A CN201410825079.1A CN201410825079A CN104646674A CN 104646674 A CN104646674 A CN 104646674A CN 201410825079 A CN201410825079 A CN 201410825079A CN 104646674 A CN104646674 A CN 104646674A
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Abstract
The invention relates to a method for manufacturing a wear-resistant part by compounding diamond with a metal blank body and a product produced by the same. A deep hole is processed in the metal blank body, then a diamond particle is placed into the deep hole of hard alloy, a metal binding material is added and the metal blank body filled with a diamond mixture is placed at a high temperature and under a high pressure, so that the diamond particle in the deep hole of the metal blank body is fused with the inner wall of the deep hole of the metal blank body to form a polycrystalline diamond body. According to the invention, the diamond is fused into the deep hole of the blank body of the wear-resistance part in a crystal combination mode; the crystal combination mode is totally different from an embedded or welding mode in the patent; the diamond not only can be well adhered to the blank body of the wear-resistant part, but also cannot generate the phenomenon of excessive stress of a wear-resistance part body material; the use performance of the wear-resistant part can be greatly improved; the method has the characteristics of good effect of the polycrystalline diamond and tightness for combination of the polycrystalline diamond and a base material.
Description
Technical field
The present invention relates to method system and the goods thereof of a kind of improvement of wearing piece preparation method, particularly a kind of diamond and metal base produced with combination wearing piece, can be applicable to the drill bit making various Drilling, or other wearing piece performance improvement.
background technology:
More and more higher now along with mechanization degree, a lot of work is all take machining mode to replace traditional manual cooked mode, forestry harvesting operations on picture probing, arable land and mountain etc. are now all at employing do mechanization operation, even the cleaning work of family also all starts to adopt do mechanization operation, requirement thus for wearing piece also gets more and more, more and more higher; Key position all at wearing piece in the current many situations of performance in order to improve wearing piece adopts hard metal article to make, as the cutting position of drill bit, the tip etc. of colter, but find in actual job, only adopt carbide alloy or rub proofness is inadequate, someone proposes to cover polycrystalline diamond on carbide alloy again in this way, namely at the key position of carbide alloy in the mode of glomerocryst at surface coverage at least one diamond, to improve the anti-wear performance of wearing piece further; Although be compounded with diamond on carbide alloy, higher hardness can be obtained, but when encountering the larger rock of hardness or soil layer, be compounded with the wearing and tearing of adamantine hard alloy wear resistant parts still very fast, show as that the life-span is short, efficiency is low, such sintered carbide ball teeth drill bit has just had a strong impact on fractured rock or has dug the effect of soil layer.One is also had to take interference fit to be firmly pressed in cemented carbide body polycrystalline diamond exactly in addition, the easy like this bulk material that makes splits, or produce very large internal stress, in use split, why there will be this situation, because the hardness ratio carbide alloy of polycrystalline diamond is higher, hard described in being pressed into by diamond closes in the hole of main body, likely by described cemented carbide body squeeze crack, even without squeeze crack, described hard alloy spherical-teeth main body is also formed with larger internal stress, and affect shock resistance, in addition, diamond solderability is poor, realization is welded to connect essentially by being difficult to.Therefore necessary this to be improved.
Do not find that there is the patent literature constructed with the present invention by patent retrieval, related to the present invention mainly containing is following:
1, the patent No. is CN201410290940.9, and the patent of invention that name is called " shock resistance diamond hard alloy complex sheet ", which discloses a kind of diamond hard alloy complex sheet of new structure.Comprise polycrystalline diamond layer and hard alloy substrate, adopt diamond dust and hard alloy substrate to be assembled together, diamond dust sintering forms polycrystalline diamond layer and forms diamond hard alloy complex sheet with hard alloy substrate under high pressure and high temperature condition; Wherein, the assembly interface of described hard alloy substrate has cylindrical boss, boss top end face has the hemispherical projections of the dress in dot matrix; Upper edge and the lower edge of described cylindrical boss are waveform hierarchic structure; Lower edge is larger than upper edge.
2, the patent No. is CN201410057543.7, the patent of invention that name is called " improving the diamond-coated hard alloy cutting element of point of a knife intensity ", which disclose the diamond-coated hard alloy cutting element improving point of a knife intensity, improve the peel resistance between diamond film and tool base, improve point of a knife intensity, and improve and resistance toly collapse cutter and mar proof.This diamond-coated hard alloy cutting element, have and be deep to a part for the metal bound phase of the degree of depth of 8 μm most by chemical treatment removed part removal corrupt split alpha region from the tool base of tungsten carbide base carbide alloy and the interface of diamond film to tool base inside, observed by the right-angle cross-section of the rear knife face in (from point of a knife front end the maximum region being no more than 100 μm) near point of a knife, remove except part between the tungsten carbide in corrupt split alpha region and between tungsten carbide and other carbide in conjunction with the tungsten carbide crystal boundary except crystal boundary, the metal bound phase of 10 ~ 300nm thickness exists with the ratio of more than 50% of tungsten carbide crystal boundary length, and the chromium being present in the metal bound phase in tungsten carbide crystal boundary is less than more than 0.21 0.40 relative to the mass ratio of cobalt.
3, patent publication No. is CN1021288008, name is called the patent of invention of " polycrystal diamond hard alloy composite rock breaking button down-the-hole bit and manufacturing process thereof ", which disclose a kind of polycrystal diamond hard alloy composite rock breaking button down-the-hole bit and manufacturing process thereof, comprise hard alloy spherical-teeth main body (1), in described hard alloy spherical-teeth main body (1), be at least provided with a polycrystalline diamond.Described polycrystalline diamond is polycrystalline diamond short cylindrical (2), be located in the ravine, hole in described hard alloy spherical-teeth main body (1), the length of described polycrystalline diamond short cylindrical (2) and diameter dimension are 1 ~ 50mmX φ, 1 ~ φ 30mm.The down-the-hold drill bit steel body of required size is obtained by machining mode, then the hard alloy spherical-teeth main body of polycrystal diamond hard alloy hard alloy composite ball tooth is fixed in the hole of down-the-hold drill bit steel body, the outbound of solid composite teeth post processing quality inspection packaging is carried out to down-the-hold drill bit steel body.
Although these patents above-mentioned have related to the application of diamond in carbide alloy, but carefully analyze and can find out, these patents all do not change foregoing application mode, wherein patent publication No. is CN1021288008, name is called that the patent of invention of " polycrystal diamond hard alloy composite rock breaking button down-the-hole bit and manufacturing process thereof " is exactly a kind of way of typically being inlayed by the mode of interference fit or welding by polycrystalline diamond short cylindrical in the hole being fixed on described hard alloy spherical-teeth main body, but, there is following defect in these connected modes: because the hardness ratio carbide alloy of polycrystalline diamond is higher, in the hole of the hard alloy spherical-teeth main body described in diamond is pressed into, likely by described hard alloy spherical-teeth main body squeeze crack, even without squeeze crack, described hard alloy spherical-teeth main body is also formed with larger internal stress, overall performance is had a negative impact, still effectively do not solve so apply some existing problems for foregoing diamond in carbide alloy, therefore be necessary to need to be studied further.
Summary of the invention
The object of the invention is to solve current diamond in carbide alloy, apply some existing problems, a kind of method that new diamond is combined with other base material as wear body and goods are proposed, it is excessive that this kind of method effectively can solve stress in the carbide alloy described in the press-in of current diamond, the easily problem of cracking.
Based on above-mentioned imagination, the technical scheme that the present invention proposes is: a kind of diamond and metal base complex method, metal body processes deep hole, again diamond particles is put into the deep hole of carbide alloy, and add metal bond materials, under again the metal base that diamond compound is housed being placed in HTHP, the inwall of the diamond particles in metal base deep hole and metal base deep hole being merged and forms polycrystalline diamond body.
Further, described metal body is the idiosome that Hardmetal materials makes, or the idiosome that high-test metal steel make.
Further, described is 0.5 μm ~ 5 μm diadusts at diamond particles, and described metal bond materials is granularity≤400 object cobalt powder powder or nickel powder powder or both mixtures; The proportioning of diadust and metal bond materials is 100:10-20(percentage by weight).
Further, described HTHP is 1390-1450 DEG C in temperature, and pressure is 5300-5800 Mpa.
Further, the described deep hole that processes on metal body refers to that the hole of deep hole shape is produced at the position of the most easily wearing and tearing at metal base by intermetallic composite coating.
Further, the shape of described hole is cylindrical or mushroom-shaped or umbrella shape or Pear-Shaped.
Further, described the metal base that diamond compound is housed is placed in HTHP under, the inwall of the diamond particles in metal base deep hole and metal base deep hole is merged forming polycrystalline diamond body is to have filled the metal base of diadust and metal bond materials, be placed in the stove of HTHP, and hole surface diadust and metal bond materials being housed at metal base installs a pressing plate, pressing plate is provided with a through hole, through hole faces the deep hole mouth of metal base, again a pressure head is directly pressed into the through hole on pressing plate in the mode of piston, at temperature 1390-1450 DEG C, pressure is that to carry out glomerocryst under the process conditions of 5300-5800 Mpa shaping, the inwall of the diamond particles in metal base deep hole and metal base deep hole is merged and forms polycrystalline diamond body.
Further, the concrete making step of described glomerocryst is as follows:
1, prepare burden: by weight ratio: diadust 100 parts, metal bond materials 10 ~ 20 parts;
2, batch mixing: the mixing of materials of step 1 gained is even, forms mixed material;
3, purified treatment: mixed material step 2 obtained, puts into vacuum drying oven and processes, temperature: 830 ~ 860 DEG C, pressure 10 ~ 100Pa, 4 ~ 6 hours time, obtains prefabricated material;
4, matrix material pretreatment: the metal base surface being used as matrix material is deoiled, removed oxide layer;
5, assemble: prefabricated material step 3 obtained is inserted in the deep hole of metal base, and uses press compacting;
6, glomerocryst: metal base step 5 obtained, is placed in sintering furnace, and the prefabricated material upper surface in deep hole is directly pressed in by pressure head, carry out HTHP glomerocryst sintering, glomerocryst sintering temperature is 1390 ~ 1450 DEG C, and pressure is 5300 ~ 5800Mpa, and the time is 10 ~ 20 minutes;
7, post processing: after glomerocryst completes, naturally cools, sheds pressing plate, is carried out by the wearing piece containing polycrystal of step 6 gained namely obtaining product after polishing is revised.
The wearing piece produced according to the method described above, comprises metal base, and metal base has deep hole, and in deep hole, glomerocryst has polycrystalline diamond body.
Further, described deep hole refers to the position of the most easily wearing and tearing at metal base, is produced the hole of deep hole shape by intermetallic composite coating.
Further, the shape of described deep hole is cylindrical or mushroom-shaped or umbrella shape or Pear-Shaped.
Beneficial effect of the present invention:
Diamond is dissolved in the deep hole of wearing piece idiosome by the mode of glomerocryst by the present invention, be different from the embedded or welding manner described in foregoing patent completely, diamond can very well and the idiosome of wearing piece be bonded together, foregoing meeting is there will not be again to cause wearing piece bulk material to produce the excessive phenomenon of stress, greatly can improve the serviceability of wearing piece, there is polycrystalline diamond effective, polycrystalline diamond and the compact feature of matrix material.
Accompanying drawing explanation
Fig. 1 is a specific embodiment structural representation of the present invention;
Fig. 2 is another specific embodiment structural representation of the present invention;
Fig. 3 is the top view of accompanying drawing 2;
Fig. 4 is another specific embodiment structural representation;
Fig. 5 is the top view of accompanying drawing 4.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described.
embodiment one
A kind of modified with composite diamond plug bores tooth, in order to be installed on drill bit, it comprises the carbide drill tooth main body 1 and composite diamond plug 2 that arrange in revolving body, wherein, the centre of described carbide drill tooth main body 1 has a blind hole (non-label), the composite molding of described composite diamond plug 2 is in described blind hole, and between described composite diamond plug 2 and described carbide drill tooth main body 1, there is transition zone 3, described transition zone 3 is interpenetrated by smart steel stone and carbide alloy and is formed.
The present invention provides again a kind of modified with composite diamond plug to bore the manufacture method of tooth, and it comprises the following steps:
(a), manufacture carbide drill tooth main body 1;
(b), in described carbide drill tooth main body 1, a blind hole is offered in centre;
(c), smart steel stone granulate is placed in described blind hole, adopt top hammer to suppress the openend of described blind hole, at high-temperature and high-pressure conditions compacted under.
Concrete glomerocryst making step is as follows:
1, prepare burden: by weight ratio: diadust 100 parts, cobalt powder 10 ~ 13 parts, silicon: 4 ~ 5 parts, cubic boron: 0.8 ~ 1.5 part;
2, batch mixing: the mixing of materials of step 1 gained is even, forms mixed material;
3, purified treatment: mixed material step 2 obtained, puts into vacuum drying oven and processes, temperature: 830 ~ 860 DEG C, pressure 10 ~ 100Pa, 4 ~ 6 hours time, obtains prefabricated material;
4, matrix material pretreatment: the metal base surface being used as matrix material is deoiled, removed oxide layer;
5, assemble: prefabricated material step 3 obtained is inserted in the deep hole of metal base, and uses press compacting;
6, glomerocryst: metal base step 5 obtained, is placed in sintering furnace, and the prefabricated material upper surface in deep hole is directly pressed in by pressure head, carry out HTHP glomerocryst sintering, glomerocryst sintering temperature is 1390 ~ 1450 DEG C, and pressure is 5300 ~ 5800Mpa, and the time is 10 ~ 20 minutes;
7, post processing: after glomerocryst completes, naturally cools, sheds pressing plate, is carried out by the wearing piece containing polycrystal of step 6 gained namely obtaining product after polishing is revised.
Disclosing based on technique scheme, the invention provides a kind of modified brill toilet article with composite diamond plug and have following beneficial effect: the invention provides a kind of modified with composite diamond plug and bore tooth, between described composite diamond plug 2 and described carbide drill tooth main body 1, composite molding is formed, but not adopt interference fit or solder bond, thus, harmful effect can not be caused to described carbide drill tooth main body 1, in addition, described composite diamond plug 2 is positioned at the middle part of described carbide drill tooth main body 1, bore tooth with the modified described in making with composite diamond plug and keep sharp.
embodiment two
A kind of brill tooth with composite diamond block, comprise and adopt the columned brill tooth main body 1 that carbide alloy is made and the boss 202 upwards extended from described brill tooth main body 201, the end face of described boss 202 is rectangle working face 205, rectangular channel (non-label) is offered on described rectangle working face 205, composite diamond block 203 has been compounded to form in described rectangular channel, and be formed with one deck permeable formation 204 between described composite diamond block 203 and described brill tooth main body 201, described permeable formation 4 is interpenetrated by diamond and carbide alloy and is formed, and is polycrystalline diamond body.The width of described rectangular channel is 2/1 to three/2nds of the width of described rectangle working face 205, thus, to have the intensity of the brill tooth of composite diamond block and sharp described in ensureing.
Concrete glomerocryst making step is as follows:
1, prepare burden: by weight ratio: diadust 100 parts, cobalt powder 12 ~ 15 parts, nickel: 2 ~ 3 parts, cubic boron: 0.8 ~ 1.5 part;
2, batch mixing: by even for the mixing of materials of step 1 gained;
3, purified treatment: mixed material step 2 obtained, puts into vacuum drying oven and processes, temperature: 830 ~ 860 DEG C, pressure 10 ~ 100Pa, 4 ~ 6 hours time, obtains prefabricated material;
4, matrix material pretreatment: the metal base surface being used as matrix material is deoiled, removed oxide layer;
5, assemble: prefabricated material step 3 obtained is inserted in the deep hole of metal base, and uses press compacting;
6, glomerocryst: metal base step 5 obtained, is placed in sintering furnace, and the prefabricated material upper surface in deep hole is directly pressed in by pressure head, carry out HTHP glomerocryst sintering, glomerocryst sintering temperature is 1400 ~ 1450 DEG C, and pressure is 5600 ~ 5800Mpa, and the time is 10 ~ 20 minutes;
7, post processing: after glomerocryst completes, naturally cools, sheds pressing plate, is carried out by the wearing piece containing polycrystal of step 6 gained namely obtaining product after polishing is revised.
embodiment three
A kind of brill tooth with many composite diamond plugs, it comprises carbide drill tooth main body 301 and many composite diamond plugs 302, wherein, described carbide drill tooth main body 301 comprises the matrix arranged in cylinder, the first cone boss 304 extended by the upper end of described matrix, and the second cone boss 306 to be extended by the upper end of described first cone boss 304, annular table terrace 305 is formed between described first cone boss 304 and described second cone boss 304, end face in described second cone boss 306 is provided with first blind hole (in figure non-label), multiple second blind hole (in figure non-label) is evenly provided with on described annular table terrace 305, composite diamond plug 302 has all been compounded to form in described first blind hole and described second blind hole, and between described composite diamond plug 302 and described carbide drill tooth main body 301, there is transition zone 303, described transition zone 303 interpenetrates by smart steel stone and carbide alloy the polycrystalline diamond formed.In the present embodiment, described first blind hole is offered from the center of the end face of described second cone boss 306, described second blind hole be equally spaced in the point on the center line of described first blind hole for the center of circle circumferentially.
Concrete glomerocryst making step is as follows:
1, prepare burden: by weight ratio: diadust 100 parts, cobalt powder 15 ~ 17 parts, silicon: 1.8 ~ 2.5 parts;
2, batch mixing: by even for the mixing of materials of step 1 gained;
3, purified treatment: mixed material step 2 obtained, puts into vacuum drying oven and processes, temperature: 830 ~ 860 DEG C, pressure 10 ~ 100Pa, 4 ~ 6 hours time, obtains prefabricated material;
4, matrix material pretreatment: the metal base surface being used as matrix material is deoiled, removed oxide layer;
5, assemble: prefabricated material step 3 obtained is inserted in the deep hole of metal base, and uses press compacting;
6, glomerocryst: metal base step 5 obtained, is placed in sintering furnace, and the prefabricated material upper surface in deep hole is directly pressed in by pressure head, carry out HTHP glomerocryst sintering, glomerocryst sintering temperature is 1400 ~ 1450 DEG C, and pressure is 5600 ~ 5800Mpa, and the time is 10 ~ 20 minutes;
7, post processing: after glomerocryst completes, naturally cools, sheds pressing plate, is carried out by the wearing piece containing polycrystal of step 6 gained namely obtaining product after polishing is revised.
Can be found out by above-described embodiment, the present invention relates to a kind of diamond and metal base complex method, metal body processes deep hole, again diamond particles is put into the deep hole of carbide alloy, and add metal bond materials, under again the metal base that diamond compound is housed being placed in HTHP, the inwall of the diamond particles in metal base deep hole and metal base deep hole being merged and forms polycrystalline diamond body.
Further, described metal body is the idiosome that Hardmetal materials makes, or the idiosome that high-test metal steel make.
Further, described is 0.5 μm ~ 5 μm diadusts at diamond particles, and described metal bond materials is granularity≤400 object cobalt powder powder or nickel powder powder or both mixtures; The proportioning of diadust and metal bond materials is 100:10-20(percentage by weight).
Further, described HTHP is 1400-1450 DEG C in temperature, and pressure is 5600-5800 Mpa.
Further, the described deep hole that processes on metal body refers to that the hole of deep hole shape is produced at the position of the most easily wearing and tearing at metal base by intermetallic composite coating.
Further, the shape of described hole is cylindrical or mushroom-shaped or umbrella shape or Pear-Shaped.
Further, described the metal base that diamond compound is housed is placed in HTHP under, the inwall of the diamond particles in metal base deep hole and metal base deep hole is merged forming polycrystalline diamond body is to have filled the metal base of diadust and metal bond materials, be placed in the stove of HTHP, and hole surface diadust and metal bond materials being housed at metal base installs a pressing plate, pressing plate is provided with a through hole, through hole faces the deep hole mouth of metal base, again a pressure head is directly pressed into the through hole on pressing plate in the mode of piston, at temperature 1390-1450 DEG C, pressure is that to carry out glomerocryst under the process conditions of 5300-5800 Mpa shaping, the inwall of the diamond particles in metal base deep hole and metal base deep hole is merged and forms polycrystalline diamond body.
Further, the concrete making step of described glomerocryst is as follows:
1, prepare burden: by weight ratio: diadust 100 parts, metal bond materials 10 ~ 20 parts;
2, batch mixing: the mixing of materials of step 1 gained is even, forms mixed material;
3, purified treatment: mixed material step 2 obtained, puts into vacuum drying oven and processes, temperature: 830 ~ 860 DEG C, pressure 10 ~ 100Pa, 4 ~ 6 hours time, obtains prefabricated material;
4, matrix material pretreatment: the metal base surface being used as matrix material is deoiled, removed oxide layer;
5, assemble: prefabricated material step 3 obtained is inserted in the deep hole of metal base, and uses press compacting;
6, glomerocryst: metal base step 5 obtained, is placed in sintering furnace, and the prefabricated material upper surface in deep hole is directly pressed in by pressure head, carry out HTHP glomerocryst sintering, glomerocryst sintering temperature is 1390 ~ 1450 DEG C, and pressure is 5300 ~ 5800Mpa, and the time is 10 ~ 20 minutes;
7, post processing: after glomerocryst completes, naturally cools, sheds pressing plate, is carried out by the wearing piece containing polycrystal of step 6 gained namely obtaining product after polishing is revised.
Obviously; above by reference to the accompanying drawings to invention has been exemplary description; obvious realization of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that technical solution of the present invention is carried out; or design of the present invention and technical scheme be directly used in other occasion, all in protection scope of the present invention without to improve.
Claims (10)
1. a diamond and metal base complex method, it is characterized in that, metal body processes deep hole, again diamond particles is put into the deep hole of carbide alloy, and add metal bond materials, under again the metal base that diamond compound is housed being placed in HTHP, the inwall of the diamond particles in metal base deep hole and metal base deep hole being merged and forms polycrystalline diamond body.
2. diamond as claimed in claim 1 and metal base complex method, is characterized in that, described metal body is the idiosome that Hardmetal materials makes, or the idiosome that high-test metal steel make.
3. diamond as claimed in claim 1 and metal base complex method, it is characterized in that, described is 0.5 μm ~ 5 μm diadusts at diamond particles, and described metal bond materials is granularity≤400 object cobalt powder powder or nickel powder powder or both mixtures; The proportioning of diadust and metal bond materials is 100:10-20(percentage by weight).
4. diamond as claimed in claim 1 and metal base complex method, is characterized in that, described HTHP is 1390-1450 DEG C in temperature, and pressure is 5300-5800 Mpa.
5. diamond as claimed in claim 1 and metal base complex method, it is characterized in that, the described deep hole that processes on metal body refers to that the hole of deep hole shape is produced at the position of the most easily wearing and tearing at metal base by intermetallic composite coating.
6. diamond as claimed in claim 5 and metal base complex method, is characterized in that, the shape of described hole is cylindrical or mushroom-shaped or umbrella shape or Pear-Shaped.
7. diamond as claimed in claim 1 and metal base complex method, it is characterized in that, described the metal base that diamond compound is housed is placed in HTHP under, the inwall of the diamond particles in metal base deep hole and metal base deep hole is merged forming polycrystalline diamond body is to have filled the metal base of diadust and metal bond materials, be placed in the stove of HTHP, and hole surface diadust and metal bond materials being housed at metal base installs a pressing plate, pressing plate is provided with a through hole, through hole faces the deep hole mouth of metal base, again a pressure head is directly pressed into the through hole on pressing plate in the mode of piston, at temperature 1390-1450 DEG C, pressure is that to carry out glomerocryst under the process conditions of 5300-5800 Mpa shaping, the inwall of the diamond particles in metal base deep hole and metal base deep hole is merged and forms polycrystalline diamond body.
8. according to the wearing piece produced according to method described in claim 1, comprise metal base, metal base has deep hole, it is characterized in that, in deep hole, glomerocryst has polycrystalline diamond body.
9. wearing piece as claimed in claim 8, it is characterized in that, described deep hole refers to the position of the most easily wearing and tearing at metal base, is produced the hole of deep hole shape by intermetallic composite coating.
10. wearing piece as claimed in claim 9, is characterized in that, the shape of described deep hole is cylindrical or mushroom-shaped or umbrella shape or Pear-Shaped.
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Cited By (4)
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| CN105671398A (en) * | 2016-01-29 | 2016-06-15 | 柳州市安龙机械设备有限公司 | Machining method for hard alloy rock excavating drilling tooth |
| CN109351999A (en) * | 2018-09-20 | 2019-02-19 | 航天材料及工艺研究所 | A kind of drill bit and method for the drilling of high rigidity fiber reinforced ceramic matrix composites part |
| CN111872375A (en) * | 2020-07-17 | 2020-11-03 | 苏州思珀利尔工业技术有限公司 | Preparation method of cobalt powder coated diamond pellet, cobalt powder coated diamond and application thereof |
| CN112658340A (en) * | 2020-12-17 | 2021-04-16 | 乐清大勇新工具有限公司 | Drill bit and machining process thereof |
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