CN113669057B - Diamond composite cutting pick and low-temperature activation liquid-phase sintering process thereof - Google Patents
Diamond composite cutting pick and low-temperature activation liquid-phase sintering process thereof Download PDFInfo
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- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 99
- 239000010432 diamond Substances 0.000 title claims abstract description 99
- 239000002131 composite material Substances 0.000 title claims abstract description 85
- 238000005520 cutting process Methods 0.000 title claims abstract description 85
- 238000005245 sintering Methods 0.000 title claims abstract description 42
- 239000007791 liquid phase Substances 0.000 title claims abstract description 21
- 230000004913 activation Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 52
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 claims abstract description 31
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 24
- 239000011159 matrix material Substances 0.000 claims abstract description 20
- 229910001325 element alloy Inorganic materials 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 239000012071 phase Substances 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 25
- 238000005219 brazing Methods 0.000 claims description 11
- 239000011812 mixed powder Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 10
- 230000003685 thermal hair damage Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 2
- 238000005065 mining Methods 0.000 description 9
- 239000003245 coal Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000036346 tooth eruption Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1835—Chemical composition or specific material
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1035—Liquid phase sintering
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1831—Fixing methods or devices
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Chemical & Material Sciences (AREA)
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Abstract
The application discloses a diamond composite cutting pick and a low-temperature activation liquid-phase sintering process thereof. The diamond-hard alloy composite tooth head is prepared by adding nickel-chromium alloy serving as an active phase into a matrix material consisting of diamond and tungsten carbide particles through a low-temperature active liquid phase sintering technology, and sintering at 900-1100 ℃ in a vacuum atmosphere to prepare the tooth head integrating high wear resistance of diamond and high impact toughness of hard alloy. The low-temperature activated liquid phase sintering technology realizes chemical metallurgical bonding between the diamond, the nickel-chromium alloy and the matrix at a lower sintering temperature, so that the bonding strength among the diamond, the nickel-chromium alloy and the matrix is fundamentally improved, the holding force of the matrix on the diamond is improved, the thermal damage of the diamond is avoided, the active element alloy is melted and flows, gaps among the matrix particles are filled, a compact sintered body is obtained, the wear resistance and the impact resistance of the composite cutting pick are fundamentally improved, and the purpose of efficiently and stably cutting hard rock for a long time is achieved.
Description
Technical Field
The invention belongs to the field of diamond composite cutting picks, and particularly relates to a diamond composite cutting pick and a low-temperature activation liquid-phase sintering process thereof.
Background
The hard alloy cutting pick is the most widely applied rock stratum cutting executing element in the mining industry at home and abroad at present, but with the increase of the mining operation depth, hard and abrasive mineral rocks such as hard rock, coal gangue and the like are increased, the defects of poor wear resistance, low impact toughness and the like of the hard alloy cutting pick are increasingly highlighted, so that the cutting pick is easy to generate abnormal wear, short in service life and frequent in replacement, and the requirements of safe and efficient mining in the mining industry at present are difficult to meet.
At present, most of polycrystalline diamond cutting teeth and dispersive diamond cutting teeth which are researched have the problems of high manufacturing cost, easy thermal damage of diamond, easy edge breakage, poor thermal stability, gaps of sintered bodies, low breaking strength of the cutting teeth and the like, and the application requirements of rapid tunneling of a tunneling machine and efficient mining of a coal mining machine are difficult to completely meet.
Disclosure of Invention
The technical problem to be solved is as follows:
aiming at the defects of the prior art, the application provides a diamond composite cutting pick and a low-temperature activation liquid phase sintering process thereof, which solve the problems of high manufacturing cost, easy thermal damage of diamond, easy edge breakage, poor thermal stability, gaps in sintered bodies, low cutting pick breaking strength and the like; the method for developing the diamond-hard alloy composite superhard cutting tooth integrating the high wear resistance of diamond and the high impact toughness of hard alloy by adopting a low-temperature activated liquid phase sintering technology enables the diamond, the hard alloy and a brazing alloy to be chemically and metallurgically bonded, enhances the bonding strength of the diamond and a hard alloy matrix, fundamentally improves the wear resistance and the impact resistance of the composite cutting tooth, and achieves the purpose of efficiently and stably cutting hard rock for a long time.
The technical scheme is as follows:
in order to achieve the purpose, the application is realized by the following technical scheme:
a diamond composite cutting pick comprises a cutting pick steel base body and a diamond-hard alloy composite cutting pick head which are firmly connected in a brazing mode; the raw materials of the diamond-hard alloy composite pick head comprise diamond particles, tungsten carbide particles and active element alloy powder, wherein the active element alloy powder comprises cobalt powder, nickel-chromium alloy powder and iron powder, the particle size of the active element alloy powder particles is less than or equal to 100 mu m, the cobalt powder in the active element alloy powder accounts for 5-30% of the total weight of the composite pick, the nickel-chromium alloy powder accounts for 5-20% of the total weight of the composite pick, and the iron powder accounts for 5-40% of the total weight of the composite pick; the particle size of the diamond particles is 10-500 mu m, and the mass proportion of the diamond particles in the composite cutting pick is 5% -30%; the particle size of the tungsten carbide particles is 1-500 mu m, and the tungsten carbide particles account for 30-80% of the mass of the composite cutting pick.
Further, the diamond-hard alloy composite tooth head is prepared by adding nickel-chromium alloy serving as an active phase into a matrix material consisting of diamond, tungsten carbide powder, cobalt powder and iron powder through a low-temperature active liquid phase sintering technology, and sintering at 900-1100 ℃ in a vacuum atmosphere to integrate the high wear resistance of diamond and the high impact toughness of hard alloy.
The low-temperature activation liquid phase sintering process for the diamond composite cutting pick comprises the following steps:
the first step is as follows: weighing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder according to the weight of 5-30% of cobalt powder, 5-20% of nickel-chromium alloy powder, 5-40% of iron powder, 5-30% of diamond and 30-80% of tungsten carbide;
the second step is that: firstly, stirring and mixing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder in a vessel, and then fully mixing the diamond particles, the tungsten carbide particles, the cobalt powder, the nickel-chromium alloy powder and the iron powder which are stirred and mixed by using a ball mill; finally stopping the machine and sealing the mixed powder into a special vessel;
the third step: filling the uniformly mixed powder into a metal mold, cold-pressing and molding under the pressure of 2-5 GPa, and demolding to obtain a diamond composite cutting pick bit matrix;
the fourth step: sintering the demolded diamond composite pick head matrix in a vacuum furnace to prepare the diamond composite pick head;
the fifth step: and placing the diamond composite cutting pick head prepared by sintering into a cutting pick substrate for brazing to obtain the diamond composite cutting pick.
Furthermore, in the second step, the mixing balls in the ball mill are hard alloy balls, and the mixing balls with different sizes of 20mm, 10mm and 5mm in diameter are selected for matching.
Furthermore, in the second step, the rotating speed of the mixer is 40-100 revolutions per minute, and the mixing time is 1-4 hours.
Further, the cold-pressing forming temperature in the three steps is room temperature.
Further, it is characterized byIn the fourth step, the vacuum degree in the vacuum furnace is not less than 10-2Pa。
Further, the sintering temperature in the fourth step is 900-1100 ℃.
Further, the sintering time in the fourth step is 30 min.
Has the advantages that:
the application provides a diamond composite cutting tooth and a low-temperature activation liquid phase sintering process thereof, which have the following beneficial effects:
1. the high-strength wear-resistant diamond composite cutting pick is used for cutting hard coal rocks by equipment such as a coal mining machine, a heading machine and the like.
2. The dispersion type diamond composite cutting pick prepared by the invention takes diamond as a hardening phase and hard alloy as a matrix, combines the advantages of high hardness of the diamond and high impact toughness of the hard alloy, makes the best of the advantages and avoids the disadvantages, and forms a novel diamond superhard composite cutting pick with unique characteristics. The cutting tool is not only suitable for cutting soft and hard rock interbedded layers, medium and hard rock layers in the mining industry, but also has simple manufacturing technology and low price, and has wide application prospect in the high-consumption field of tools such as coal mining and the like.
3. Compared with the existing preparation technology of the diamond composite cutting pick, the low-temperature activation liquid phase sintering technology can realize chemical metallurgical bonding between the diamond, the nickel-chromium alloy and the matrix at a lower sintering temperature, so that the bonding strength among the diamond, the nickel-chromium alloy and the matrix is fundamentally improved, the holding force of the matrix on the diamond is improved, meanwhile, the thermal damage of the diamond is avoided, the active element alloy is melted and flows, gaps among the matrix particles are filled, a compact sintered body is obtained, the wear resistance and the shock resistance of the composite cutting pick are fundamentally improved, and the purpose of efficiently and stably cutting hard rock for a long time is achieved.
4. The diamond-hard alloy composite cutting pick prepared by low-temperature activation liquid phase sintering provided by the patent has the advantages that the abrasive resistance is improved by 5 times, the impact toughness is improved by 30%, the service life is prolonged by more than 2 times, and the cutting pick cost consumed by cutting rock in unit volume is reduced by 15% -20%.
Description of the drawings:
FIG. 1 is a schematic view of the construction of a diamond composite pick of the present invention.
Detailed Description
The following will further explain the embodiments and working procedures of the present invention by referring to examples.
Example 1:
the low-temperature activation liquid phase sintering process for the diamond composite cutting pick comprises the following steps:
the first step is as follows: weighing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder according to the weight percentage that the cobalt powder accounts for 5-30% of the total weight of the composite cutting pick head, the nickel-chromium alloy powder accounts for 5-20% of the total weight of the composite cutting pick head, the iron powder accounts for 5-40% of the total weight of the composite cutting pick head, the diamond accounts for 5-30% of the total weight of the composite cutting pick head, and the tungsten carbide accounts for 30-80% of the total weight of the composite cutting pick head;
the second step is that: firstly, stirring and mixing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder in a vessel, then fully mixing the diamond particles, the tungsten carbide particles, the cobalt powder, the nickel-chromium alloy powder and the iron powder which are stirred and mixed by using a ball mill, wherein the mixing balls are hard alloy balls, and are selected to be used in a matching way, the diameters of the mixing balls are 20mm, 10mm and 5mm, the rotating speed of a mixer is 40-100 r/min, and the mixing time is 1-4 hours; finally stopping the machine and sealing the mixed powder into a special vessel;
the third step: filling the uniformly mixed powder into a metal mold, cold-pressing and molding under the pressure of 2-5 GPa, and demolding to obtain a diamond composite cutting pick bit matrix;
the fourth step: sintering the demolded diamond composite cutting pick body in a vacuum furnace to prepare the diamond composite cutting pick, wherein the sintering temperature is 900-1100 ℃, and the vacuum degree in the furnace is not lower than 10-2Pa, keeping the temperature for 30 min;
the fifth step: and placing the diamond composite cutting pick head prepared by sintering into a cutting pick substrate for brazing to obtain the diamond composite cutting pick.
Example 2:
the low-temperature activation liquid phase sintering process for the diamond composite cutting pick comprises the following steps:
the first step is as follows: weighing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder according to the weight percentage that the cobalt powder accounts for 5-30% of the total weight of the composite cutting pick head, the nickel-chromium alloy powder accounts for 5-20% of the total weight of the composite cutting pick head, the iron powder accounts for 5-40% of the total weight of the composite cutting pick head, the diamond accounts for 5-30% of the total weight of the composite cutting pick head, and the tungsten carbide accounts for 30-80% of the total weight of the composite cutting pick head;
the second step is that: firstly, stirring and mixing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder in a vessel, then fully mixing the diamond particles, the tungsten carbide particles, the cobalt powder, the nickel-chromium alloy powder and the iron powder which are stirred and mixed by using a ball mill, wherein the mixing balls are hard alloy balls, and are selected to be used in a matching way, the diameters of the mixing balls are 20mm, 10mm and 5mm, the rotating speed of a mixer is 40 revolutions per minute, and the mixing time is 1 hour; finally stopping the machine and sealing the mixed powder into a special vessel;
the third step: filling the uniformly mixed powder into a metal mold, cold-pressing and molding under the pressure of 2-5 GPa, and demolding to obtain a diamond composite cutting pick bit matrix;
the fourth step: sintering the demolded diamond composite cutting pick body in a vacuum furnace to prepare the diamond composite cutting pick, wherein the sintering temperature is 900 ℃, and the vacuum degree in the furnace is not lower than 10-2Pa, keeping the temperature for 30 min;
the fifth step: and placing the diamond composite cutting pick head prepared by sintering into a cutting pick substrate for brazing to obtain the diamond composite cutting pick.
Example 3:
the low-temperature activation liquid phase sintering process for the diamond composite cutting pick comprises the following steps:
the first step is as follows: weighing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder according to the weight percentage that the cobalt powder accounts for 5-30% of the total weight of the composite cutting pick head, the nickel-chromium alloy powder accounts for 5-20% of the total weight of the composite cutting pick head, the iron powder accounts for 5-40% of the total weight of the composite cutting pick head, the diamond accounts for 5-30% of the total weight of the composite cutting pick head, and the tungsten carbide accounts for 30-80% of the total weight of the composite cutting pick head;
the second step is that: firstly, stirring and mixing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder in a vessel, then fully mixing the diamond particles, the tungsten carbide particles, the cobalt powder, the nickel-chromium alloy powder and the iron powder which are stirred and mixed by using a ball mill, wherein the mixing balls are hard alloy balls, and are selected to be used in a matching way, the diameters of the mixing balls are 20mm, 10mm and 5mm, the rotating speed of a mixer is 100 revolutions per minute, and the mixing time is 4 hours; finally stopping the machine and sealing the mixed powder into a special vessel;
the third step: filling the uniformly mixed powder into a metal mold, cold-pressing and molding under the pressure of 2-5 GPa, and demolding to obtain a diamond composite cutting pick bit matrix;
the fourth step: sintering the demolded diamond composite cutting pick body in a vacuum furnace to prepare the diamond composite cutting pick, wherein the sintering temperature is 1100 ℃, and the vacuum degree in the furnace is not lower than 10-2Pa, keeping the temperature for 30 min;
the fifth step: and placing the diamond composite cutting pick head prepared by sintering into a cutting pick substrate for brazing to obtain the diamond composite cutting pick.
The result shows that the brazing filler metal can reduce the sintering welding temperature, the brazing filler metal is melted uniformly, a thin layer of continuous flaky carbide is formed on the surface of the diamond abrasive particles, the brazing filler metal is moderate in hardness, the holding strength on diamond is high, and the thermal damage to the diamond is small.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by the person skilled in the art shall be covered by the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The diamond composite cutting pick is characterized by comprising a cutting pick steel base body and a diamond-hard alloy composite cutting pick head which are firmly connected in a brazing mode; the raw materials of the diamond-hard alloy composite pick head comprise diamond particles, tungsten carbide particles and active element alloy powder, wherein the active element alloy powder comprises cobalt powder, nickel-chromium alloy powder and iron powder, the diameter of the active element powder particles is less than or equal to 100 mu m, the cobalt powder in the active element alloy powder accounts for 5-30% of the total weight of the composite pick head, the nickel-chromium alloy powder accounts for 5-20% of the total weight of the composite pick head, and the iron powder accounts for 5-40% of the total weight of the composite pick head; the granularity of the diamond particles is 10-500 mu m, and the diamond particles account for 5-30% of the total weight of the composite cutting pick head; the particle size of the tungsten carbide particles is 1-500 mu m, and the tungsten carbide particles account for 30-80% of the total weight of the composite cutting pick head.
2. The diamond composite pick of claim 1, wherein: the diamond-hard alloy composite tooth head is prepared by adding nickel-chromium alloy serving as an active phase into a matrix material consisting of diamond, tungsten carbide powder, cobalt powder and iron powder through a low-temperature active liquid phase sintering technology, and sintering at 900-1100 ℃ in a vacuum atmosphere.
3. A low-temperature activation liquid phase sintering process for a diamond composite cutting pick is characterized by comprising the following steps:
the first step is as follows: weighing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder according to the weight of 5-30% of cobalt powder, 5-20% of nickel-chromium alloy powder, 5-40% of iron powder, 5-30% of diamond and 30-80% of tungsten carbide;
the second step is that: firstly, stirring and mixing diamond particles, tungsten carbide particles, cobalt powder, nickel-chromium alloy powder and iron powder in a vessel, and then fully mixing the diamond particles, the tungsten carbide particles, the cobalt powder, the nickel-chromium alloy powder and the iron powder which are stirred and mixed by using a ball mill; finally stopping the machine and sealing the mixed powder into a special vessel;
the third step: filling the uniformly mixed powder into a metal mold, cold-pressing and molding under the pressure of 2-5 GPa, and demolding to obtain a diamond composite cutting pick bit matrix;
the fourth step: sintering the demolded diamond composite pick head matrix in a vacuum furnace to prepare the diamond composite pick head;
the fifth step: and placing the diamond composite cutting pick head prepared by sintering into a cutting pick substrate for brazing to obtain the diamond composite cutting pick.
4. The low temperature activation liquid phase sintering process for a diamond composite pick according to claim 3, wherein: in the second step, the mixing balls in the ball mill are hard alloy balls, and the mixing balls with different sizes of 20mm, 10mm and 5mm in diameter are selected for matching.
5. The low temperature activation liquid phase sintering process for a diamond composite pick according to claim 4, wherein: in the second step, the rotating speed of the mixer is 40-100 revolutions per minute, and the mixing time is 1-4 hours.
6. The low temperature activation liquid phase sintering process for a diamond composite pick according to claim 3, wherein: and the cold pressing forming temperature in the third step is room temperature.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824575A (en) * | 2010-05-27 | 2010-09-08 | 中南大学 | Ultrafine grain wolfram carbide/ cobalt hard alloy and preparation method thereof |
| CN101985717A (en) * | 2010-11-13 | 2011-03-16 | 湖南三三合金集团有限公司 | Method for preparing high-tenacity super-coarse-grained tungsten and cobalt hard alloy |
| CN103806844A (en) * | 2014-03-03 | 2014-05-21 | 辽宁工业大学 | Braze welding nickel base impregnated diamond bit for deep part solid rock drilling, and manufacturing method of braze welding nickel base impregnated diamond bit |
| CN106399792A (en) * | 2016-10-09 | 2017-02-15 | 张倩楠 | Cemented carbide and manufacturing method thereof |
| CN110000376A (en) * | 2019-05-22 | 2019-07-12 | 中国矿业大学 | A kind of nickel molybdenum chromium-diamond alloy composite powder and its preparation method and application |
-
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- 2021-08-06 CN CN202110901633.XA patent/CN113669057B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824575A (en) * | 2010-05-27 | 2010-09-08 | 中南大学 | Ultrafine grain wolfram carbide/ cobalt hard alloy and preparation method thereof |
| CN101985717A (en) * | 2010-11-13 | 2011-03-16 | 湖南三三合金集团有限公司 | Method for preparing high-tenacity super-coarse-grained tungsten and cobalt hard alloy |
| CN103806844A (en) * | 2014-03-03 | 2014-05-21 | 辽宁工业大学 | Braze welding nickel base impregnated diamond bit for deep part solid rock drilling, and manufacturing method of braze welding nickel base impregnated diamond bit |
| CN106399792A (en) * | 2016-10-09 | 2017-02-15 | 张倩楠 | Cemented carbide and manufacturing method thereof |
| CN110000376A (en) * | 2019-05-22 | 2019-07-12 | 中国矿业大学 | A kind of nickel molybdenum chromium-diamond alloy composite powder and its preparation method and application |
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