CN115533103A - Novel method for manufacturing superhard material sintered body for cutting reinforced concrete - Google Patents
Novel method for manufacturing superhard material sintered body for cutting reinforced concrete Download PDFInfo
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- CN115533103A CN115533103A CN202211254857.7A CN202211254857A CN115533103A CN 115533103 A CN115533103 A CN 115533103A CN 202211254857 A CN202211254857 A CN 202211254857A CN 115533103 A CN115533103 A CN 115533103A
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- 239000000463 material Substances 0.000 title claims abstract description 48
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000005520 cutting process Methods 0.000 title claims abstract description 21
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 27
- 239000010432 diamond Substances 0.000 claims abstract description 27
- 238000005245 sintering Methods 0.000 claims abstract description 23
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000003082 abrasive agent Substances 0.000 claims description 17
- 239000011159 matrix material Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 10
- 239000006061 abrasive grain Substances 0.000 claims description 8
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 229910052718 tin Inorganic materials 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 6
- 239000004568 cement Substances 0.000 abstract description 6
- 239000004576 sand Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000002245 particle Substances 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/142—Thermal or thermo-mechanical treatment
-
- 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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- 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
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
-
- 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
- C22C2026/003—Cubic boron nitrides only
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention belongs to the technical field of manufacturing of sintered superhard material tools, and particularly relates to a novel method for manufacturing a superhard material sintered body for cutting reinforced concrete. The method is an effective and feasible method for disassembling the large waste reinforced concrete by using a large-sized superhard saw blade or a rope saw so as to facilitate loading, unloading and transportation. Reinforced concrete generally contains a mixture of cement, sand and reinforcing steel, and a single superabrasive material, such as diamond or CBN, has relatively low processing efficiency and tool life. Therefore, the invention adopts proper proportion of different grinding materials and optimization of sintering process to ensure that the superhard material sintered body has good sharpness and wear resistance, and better realizes cutting processing of reinforced concrete. The sintered body manufactured by the method can give consideration to sharpness and service life, and for superhard material tool manufacturing enterprises, additional equipment does not need to be purchased, the process is simple and feasible, and the operability is strong.
Description
Technical Field
The invention belongs to the technical field of manufacturing of sintered superhard material tools, and particularly relates to a novel method for manufacturing a superhard material sintered body for cutting reinforced concrete. The manufactured superhard material sintered body is mainly used for cutting and processing reinforced concrete of building load-bearing walls, reinforced concrete of bridges, reinforced concrete of subway and the like.
Background
With the construction of one round of civil commercial residences and other infrastructures, some buildings built earlier, such as civil commercial high-rise houses, bridges, subways, and the like, face the situation that the facilities are damaged and the reconstruction must be reversed. Most of these waste buildings are made of massive reinforced concrete, which must be disassembled for easy handling and transportation. The disassembly of the large reinforced concrete blocks by using a large-sized superhard saw blade or a rope saw is one of the effective methods.
The cutting machining of reinforced concrete belongs to high-efficiency heavy-load machining, and has higher requirements on the service life of tools. Sintering, electroplating and brazing are the major methods of diamond tool manufacture today. The brazing superhard material tool is generally used for manufacturing a single-layer tool, and the single-layer tool is sharp but short in service life; the electroplated superhard material tool with the multilayer abrasive is difficult to be applied to heavy-load processing due to poor holding strength of the bonding agent to the abrasive grains. The hot pressing sintering can overcome the problems, and a multilayer sintered superhard material sintered body which is more durable than brazing and electroplating can be manufactured through proper carcass abrasive ratio and proper sintering temperature and pressure.
The reinforced concrete generally contains three materials of cement, sand and reinforcing steel bar, the diamond abrasive particles can cut the cement and sand, but are not suitable for cutting the reinforcing steel bar, because the carbon element on the diamond and the iron element on the reinforcing steel bar can form iron-carbon compound (such as Fe) at the high temperature of cutting in the process of cutting the reinforcing steel bar by the diamond 3 C 2 ) (ii) a Cubic Boron Nitride (CBN) works slightly less well with cement and sand than diamond, but CBN works without the expense of this compound-forming reaction.
The existing superhard material saw blade or wire saw is basically single abrasive grain, either diamond or CBN, and has relatively low processing efficiency and service life. For this reason, it is necessary to find a sintered body of a superhard material of CBN and diamond mixed abrasive grains, but simple mixing of diamond and CBN cannot sufficiently exert the complementary advantages of these two abrasives. The sharp, non-wear-resistant and non-sharp are spells of superhard material tools, especially tools for processing reinforced concrete. In view of the hardness of reinforced concrete, a sintered body matrix applied to reinforced concrete processing is generally suitable for a Co-based, fe-based and Ni-based matrix, but they have poor adhesion embedding properties for CBN, and thus CBN should be pretreated.
In conclusion, the proper proportion of different grinding materials and the optimization of the sintering process ensure that the super-hard material sintered body has good sharpness and wear resistance, and can better realize the cutting processing of reinforced concrete.
Disclosure of Invention
The invention aims to provide a novel method for manufacturing a superhard material sintered body for cutting reinforced concrete. The method aims at the problem that reinforced concrete contains a mixture of steel bars, gravels and cement and is not suitable for cutting by using a single abrasive, and the sharpness and the service life of a diamond tool are excellent when the reinforced concrete is cut by properly proportioning the diamond and the CBN abrasive and optimizing the sintering process. The method hardly increases the extra cost for manufacturing the superhard material sintered body, and has excellent application prospect.
The technical scheme adopted by the invention is that a new method for manufacturing a superhard material sintered body for cutting reinforced concrete comprises the following steps:
(1) Selecting an abrasive material: the abrasive materials are 60/70 mesh diamond and 90/100 mesh CBN;
(2) Selecting metal powder of a matrix: mixed metal powder of 300/350 mesh Co, fe, sn, ti (6-10 wt.% Fe, 2.5wt.% Sn, 3wt.% Ti, balance Co), mixed metal powder of 300/350 mesh Fe, P, sn, ti (5-9 wt.% P, 4wt.% Sn, 2wt.% Ti, balance Fe), or mixed metal powder of 300/350 mesh Ni, cr, B, si (4-8 wt.% Cr, 2wt.% B, 2.5wt.% Si, balance Ni);
(3) Pre-sintering a CBN grinding material;
(4) Mixing the grinding materials: mixing diamond and pre-sintered CBN, wherein the volume ratio of the diamond to the pre-sintered CBN is 0.8-1.2;
(5) Adding the mixed abrasive into the matrix metal powder, wherein the volume ratio of the mixed abrasive to the matrix metal powder is 10-30%, and fully stirring;
(6) Cold press molding: under normal temperature, the pressurizing pressure is between 80 and 120MPa, and the pressure maintaining time is between 120 and 240 seconds;
(7) Hot-pressing and sintering: under the vacuum of less than 0.1Pa, the heating temperature is 780-840 ℃, the pressurizing pressure is 16-24 MPa, and the heat preservation and pressure maintaining time is 60-120 seconds.
The CBN abrasive material is presintered, and the specific manufacturing process comprises the following steps: pouring 6% of zinc stearate into a CBN grinding material, fully stirring, then pouring the CBN grinding material into 200/300-mesh CuSnTi alloy (5 wt.% of Sn, 2.5wt.% of Ti and the balance of Cu) powder which is twice the weight of CBN, taking out after granulation, and spraying 5wt.% of 300/350-mesh simple substance Ti powder as a separant; atmospheric pressure H 2 Sintering at 760-820 deg.C for 40-80 s under protection; the pre-sintered abrasive grains of 60/70 mesh were screened.
The invention relates to a novel method for sintering a mixed grinding material of diamond and CBN by using mixed metal powder for cutting and processing reinforced concrete, which has the advantages that:
(1) Aiming at the problem that reinforced concrete contains three substances of reinforcing steel bars, sand stones and cement and is difficult to use single abrasive particle cutting, the scheme of manufacturing the sintered body by adopting the mixed abrasive particles can give consideration to the sharpness and the service life of the sintered body.
(2) The method can fully exert the processing performance of the superhard material sintered body by utilizing the presintering of the CBN abrasive particles, the proper proportion of different abrasives and the proper selection of sintering process parameters.
(3) For superhard material tool manufacturing enterprises, the process of the invention does not need to purchase additional equipment, and has simple and feasible process and strong operability.
Detailed Description
The invention will be described in more detail with reference to the examples given below:
example 1: production of sintered superhard material for cutting reinforced concrete from Co-based mixed metal powder
(1) Selecting an abrasive material: the abrasive materials are 60/70 mesh diamond and 90/100 mesh CBN;
(2) Selecting metal powder of a matrix: mixed metal powder of 300/350 mesh Co, fe, sn, ti (8 wt.% Fe, 2.5wt.% Sn, 3wt.% Ti, balance Co);
(3) Pre-sintering CBN abrasive;
(4) Mixing the grinding materials: mixing diamond and pre-sintered CBN, wherein the mixing volume ratio of the diamond to the pre-sintered CBN is 0.8;
(5) Adding the mixed abrasive into the matrix metal powder, wherein the volume ratio of the mixed abrasive to the matrix metal powder is 10%, and fully stirring;
(6) Cold press molding: at normal temperature, the pressurizing pressure is 80MPa, and the pressure maintaining time is 120 seconds;
(7) Hot-pressing and sintering: under the vacuum of less than 0.1Pa, the heating temperature is 780 ℃, the pressurizing pressure is 16MPa, and the heat preservation and pressure maintaining time is 60 seconds.
The CBN abrasive material is presintered, and the specific manufacturing process comprises the following steps: pouring 6% of zinc stearate into a CBN grinding material, fully stirring, then pouring the CBN grinding material into 200/300-mesh CuSnTi alloy (5 wt.% of Sn, 2.5wt.% of Ti and the balance of Cu) powder which is twice the weight of the CBN, taking out after granulation, and spraying 5wt.% of 300/350-mesh simple substance Ti powder as a separant; atmospheric pressure H 2 Sintering at 760 ℃ for 40 seconds under protection; 60/70 mesh pre-sintered abrasive grains were screened.
Example 2: production of sintered superhard material for cutting reinforced concrete from Fe-based mixed metal powder
(1) Selecting an abrasive material: the abrasive materials are 60/70 mesh diamond and 90/100 mesh CBN;
(2) Selecting metal powder of a matrix: mixed metal powder of 300/350 mesh Fe, P, sn, ti (6 wt.% P, 4wt.% Sn, 2wt.% Ti, balance Fe);
(3) Pre-sintering CBN abrasive;
(4) Mixing the grinding materials: mixing diamond and pre-sintered CBN, wherein the mixing volume ratio of the diamond to the pre-sintered CBN is 1.0;
(5) Adding the mixed abrasive into the matrix metal powder, wherein the volume ratio of the mixed abrasive to the matrix metal powder is 20%, and fully stirring;
(6) Cold press molding: at normal temperature, the pressurizing pressure is 100MPa, and the pressure maintaining time is 180 seconds;
(7) Hot-pressing and sintering: heating at 810 deg.C under vacuum of less than 0.1Pa, pressurizing at 20MPa, and maintaining the temperature and pressure for 90 s.
The CBN abrasive material is presintered, and the specific manufacturing process comprises the following steps: pouring 6% of zinc stearate into a CBN grinding material, fully stirring, then pouring the CBN grinding material into 200/300-mesh CuSnTi alloy (5 wt.% of Sn, 2.5wt.% of Ti and the balance of Cu) powder which is twice the weight of the CBN, taking out after granulation, and spraying 5wt.% of 300/350-mesh simple substance Ti powder as a separant; atmospheric pressure H 2 Sintering at 790 deg.c for 60 sec; 60/70 mesh pre-sintered abrasive grains were screened.
Example 3: production of sintered superhard material for cutting reinforced concrete from Ni-based mixed metal powder
(1) Selecting an abrasive material: the abrasive materials are 60/70 mesh diamond and 90/100 mesh CBN;
(2) Selecting metal powder of a matrix: mixed metal powder of 300/350 mesh Ni, cr, B, si (6 wt.% Cr, 2wt.% B, 2.5wt.% Si, balance Ni);
(3) Pre-sintering CBN abrasive;
(4) Mixing the grinding materials: mixing diamond and pre-sintered CBN, wherein the mixing volume ratio of the diamond to the pre-sintered CBN is 1.2;
(5) Adding the mixed abrasive into the matrix metal powder, wherein the volume ratio of the mixed abrasive to the matrix metal powder is 30%, and fully stirring;
(6) And (3) cold press molding: at normal temperature, the pressurizing pressure is 120MPa, and the pressure maintaining time is 240 seconds;
(7) Hot-pressing and sintering: under the vacuum of less than 0.1Pa, the heating temperature is 840 ℃, the pressurizing pressure is 24MPa, and the heat preservation and pressure maintaining time is 120 seconds.
The CBN abrasive material is pre-sintered, and the specific manufacturing process comprises the following steps: pouring 6% of zinc stearate into a CBN grinding material, fully stirring, then pouring the CBN grinding material into 200/300-mesh CuSnTi alloy (5 wt.% of Sn, 2.5wt.% of Ti and the balance of Cu) powder which is twice the weight of the CBN, taking out after granulation, and spraying 5wt.% of 300/350-mesh simple substance Ti powder as a separant; atmospheric pressure H 2 Sintering at 820 ℃ for 80 seconds under protection; the pre-sintered abrasive grains of 60/70 mesh were screened.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, so that any person skilled in the art can make changes or modifications to the equivalent embodiments using the above disclosure. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention will still fall within the protection scope of the present invention.
Claims (2)
1. A new method for manufacturing a superhard material sintered body for cutting reinforced concrete is characterized in that:
the method comprises the following steps:
(1) Selecting an abrasive material: the abrasive materials are 60/70 mesh diamond and 90/100 mesh CBN;
(2) Selecting metal powder of a matrix: mixed metal powders of 300/350 mesh of Co, fe, sn, ti (6-10 wt.% Fe, 2.5wt.% Sn, 3wt.% Ti, balance Co), 300/350 mesh of Fe, P, sn, ti (5-9 wt.% P, 4wt.% Sn, 2wt.% Ti, balance Fe), or 300/350 mesh of Ni, cr, B, si (4-8 wt.% Cr, 2wt.% B, 2.5wt.% Si, balance Ni);
(3) Pre-sintering a CBN grinding material;
(4) Mixing the grinding materials: mixing diamond and pre-sintered CBN, wherein the volume ratio of the diamond to the pre-sintered CBN is 0.8-1.2;
(5) Adding the mixed abrasive into the matrix metal powder, wherein the volume ratio of the mixed abrasive to the matrix metal powder is 10-30%, and fully stirring;
(6) Cold press molding: under normal temperature, the pressurizing pressure is between 80 and 120MPa, and the pressure maintaining time is between 120 and 240 seconds;
(7) Hot-pressing and sintering: under the vacuum of less than 0.1Pa, the heating temperature is 780-840 ℃, the pressurizing pressure is 16-24 MPa, and the heat preservation and pressure maintaining time is 60-120 seconds.
2. The novel method for manufacturing a sintered body of a superhard material for cutting reinforced concrete according to claim 1, wherein: the CBN abrasive material is presintered, and the specific manufacturing process comprises the following steps: pouring 6% of zinc stearate into a CBN grinding material, fully stirring, then pouring the CBN grinding material into 200/300-mesh CuSnTi alloy (5 wt.% of Sn, 2.5wt.% of Ti and the balance of Cu) powder which is twice the weight of the CBN, taking out after granulation, and spraying 5wt.% of 300/350-mesh simple substance Ti powder as a separant; atmospheric pressure H 2 Sintering at 760-820 deg.C for 40-80 s under protection; the pre-sintered abrasive grains of 60/70 mesh were screened.
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