CN111687509B - Vacuum brazing diamond compound and method for manufacturing tool multi-layer brazing - Google Patents
Vacuum brazing diamond compound and method for manufacturing tool multi-layer brazing Download PDFInfo
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- CN111687509B CN111687509B CN202010586538.0A CN202010586538A CN111687509B CN 111687509 B CN111687509 B CN 111687509B CN 202010586538 A CN202010586538 A CN 202010586538A CN 111687509 B CN111687509 B CN 111687509B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
Abstract
The invention belongs to the field of manufacturing of vacuum brazing diamond tools, and mainly relates to a vacuum brazing diamond compounded abrasive and application thereof in manufacturing of a multilayer diamond vacuum brazing tool. The compound abrasive is prepared by mixing Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, a framework material and diamond. The multilayer diamond vacuum brazing tool obtained by the method has the advantages of small damage to high-vacuum and high-temperature brazing of diamond, high holding force and firm metal weldability to a steel substrate, so that the working strength and the service life of the multilayer diamond vacuum brazing tool are greatly improved, the sharpness is greatly improved, and the multilayer diamond vacuum brazing tool is simple and convenient to manufacture, energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the field of manufacturing of vacuum brazing diamond tools, in particular to a vacuum brazing diamond compound and a method for manufacturing multi-layer brazing of tools.
Background
Diamond is commonly called "diamond" and is the original body of diamond, which is a mineral composed of carbon elements and is an allotrope of graphite. Diamond is the hardest naturally occurring substance in nature and is used in a wide variety of applications, for example: artware, cutting tools in industry. Graphite can form artificial diamond at high temperature and high pressure, and is also a precious gem, and the high hardness and excellent physical and mechanical properties of the diamond make the diamond tool become an indispensable effective tool for processing various hard materials.
However, most of the vacuum brazing diamond tools are applied tools formed by brazing a single-layer diamond on a steel substrate with a certain specification and form, belong to industrial teeth, have longer service life and sharp abrasive dust compared with diamond tools manufactured by an electroplating process, and have shorter service life and higher cost compared with traditional hot-pressing or cold-pressing sintering diamond tools in the application fields of steel-concrete construction, highway cutting drilling, environment-friendly mining of mines, geological rock stratum drilling and the like. The traditional hot-pressing or cold-pressing diamond sintering tool has the defects that the diamond density in the cutter teeth is too high, the metallurgical bonding of the diamonds in the cutter teeth to a metal matrix is unstable and perfect, the process is basically embedded bonding, and the process has the inevitable defect that the diamond is replaced by a very thick working layer and a large amount of diamonds layer by layer, so that the material waste is very large, the diamonds can fall off when the diamonds are not exposed, the sharpness is not high, and the comprehensive use efficiency is still low.
Therefore, the production of the vacuum brazing diamond compound and the manufacturing tool multi-layer brazing method breaks through the current situation that the traditional vacuum brazing diamond tool mainly adopts a single layer to replace a part of electroplating process diamond tools, is not as good as hot-pressing sintered diamond tools due to sharp and low durability, and solves the problems of large material waste, low bonding and exposure on diamond, easy falling off, low sharpness, low comprehensive use efficiency and the like of the traditional hot-pressing or cold-pressing sintered diamond tools, and has wide market demands.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a vacuum brazing diamond compound and a manufacturing tool multilayer brazing method, which break through the current situation that the traditional vacuum brazing diamond tool mainly adopts a single layer to replace a part of electroplating process diamond tools, and has the advantages of sharpness and low durability compared with the hot-pressed sintering diamond tool, and solve the problems of high material waste, low exposure to the diamond due to poor bonding, easy falling, low sharpness, low comprehensive utilization efficiency and the like of the traditional hot-pressed or cold-pressed sintering diamond tool, and is used for overcoming the defects in the prior art.
The technical scheme adopted by the invention is as follows: the method for brazing the diamond compound material in vacuum and manufacturing the tool multilayer brazing comprises the steps of manufacturing a diamond grinding layer, wherein the diamond grinding layer comprises a mixed grinding material prepared by mixing Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, a framework material and diamond, and the mass percentage ratio of the Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, the framework material and the diamond is as follows in sequence: the composite metal powder comprises, by mass, 60-80% of Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, 10-25% of framework material and 10-25% of diamond, wherein the Cu-Sn-Cr-Ti-Ni-Fe mixed metal powder comprises, by mass, 50-65% of Cu, 10-15% of Sn, 5-15% of Cr, 5-15% of Ti, 0.5-1.5% of Ni and 5-10% of Fe, the framework material is YG8, WC or Cr3C2, the diamond is artificial diamond, and the granularity is 60/70 meshes-25/30 meshes.
The diamond grinding layer is a base part of a rope saw bead, a saw blade and a steel-concrete engineering drill bit which is made of steel material products according to the specification design of common diamond products, a clean annular groove or a straight groove is formed in the base part, a vacuum brazing diamond mixed abrasive is filled and coated inside and outside the clean annular groove or the straight groove, a grinding working layer is formed after vacuum brazing, the manufactured tool is a multilayer diamond vacuum brazing tool, the depth of the clean annular groove or the straight groove determines the thickness of the grinding working layer in the multilayer diamond vacuum brazing tool, the depth of a notch of the clean annular groove or the straight groove is 1-6 mm, and the width of the notch of the clean annular groove or the straight groove is 0.2-1 mm.
The vacuum brazing diamond mixed abrasive is uniformly mixed into a paste structure by utilizing a high molecular organic adhesive, the inside and the outside of a clean annular groove or a straight groove on the basic component of the multilayer diamond brazing tool are filled and coated, the mixed vacuum brazing diamond mixed abrasive is brazed and sintered in a vacuum furnace, and the vacuum brazing diamond mixed abrasive is taken out after cooling.
When the brazing sintering is carried out in the vacuum furnace, the vacuum degree in the vacuum furnace is not lower than 1 multiplied by 10 < -2 > Pa, the brazing temperature in the vacuum furnace is 980-1050 ℃, the heat preservation time in the vacuum furnace is 5-10min, the sintered diamond mixed grinding material is taken out from the vacuum furnace, and the product can be taken out after being cooled to below 200 ℃.
The preparation method of the high molecular organic adhesive comprises the following steps:
1) 1-20 parts of butyraldehyde;
2) 5000 portions of anhydrous ethanol is adopted;
3) mixing 1-20 parts of butyraldehyde and 2000-5000 parts of absolute ethyl alcohol;
4) heating the mixture of 1-20 parts of butyraldehyde and 2000-5000 parts of anhydrous ethanol to 40-60 ℃, stirring until the butyraldehyde is completely dissolved to the required viscosity.
The thickness of the vacuum brazing diamond compound abrasive coated on the outer side surface of the clean annular groove or the straight groove is 255-750 mu m.
The invention has the beneficial effects that: the high hardness, high thermal stability and other excellent physical properties of the artificial diamond are commonly used for processing various hard and brittle materials, and along with the reduction of the diamond cost and the gradual maturity of the vacuum welding technology, the artificial diamond is used for manufacturing a multilayer diamond vacuum brazing tool, so that the wear resistance and the sharpness can be effectively improved. The Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder as the vacuum brazing solder has the characteristics of good wettability to diamond, little damage to thermal stress of diamond, high welding strength to steel matrix materials and the like, is an ideal solder for the current multilayer brazing diamond tool, and has good toughness because the solder is still a copper-based solder. In addition, because the hardness of the diamond is very high, and the relative wear resistance of the copper-based brazing filler metal is low, in order to further improve the wear resistance of the multilayer brazing filler metal, a framework phase is properly added into the coating, so that the hardness and the wear resistance of the brazing filler metal are favorably improved; the vacuum brazing multi-layer diamond tool is manufactured by applying a vacuum brazing diamond mixed abrasive in manufacturing wire saw beads, saw blades and reinforced concrete engineering drill bits, the vacuum degree of a vacuum furnace is higher than 1 x 10 < -2 > Pa, the decomposition and volatilization of organic gel butyral and the full reduction of an oxide material are facilitated, and meanwhile, the graphitization of diamond at high temperature is reduced. In high vacuum and high temperature, Cu-Sn-Cr-Ti-Fe-Ni reacts with carbon atoms on the surface layer of the diamond to form carbides Cr7C3, TiC, Ni-Cr alloy, Fe-Ti and Fe-Cr alloy, and the elements are chemically and metallurgically combined with each other, so that the connection strength and the wear resistance of the metal powder to the diamond are improved. The addition of the framework material can effectively improve the wear resistance by manufacturing a multi-layer diamond vacuum brazing tool, so that the diamond is not easy to fall off, the exposure height of the diamond is further improved, and the sharpness is improved; compared with the prior art, the invention has the advantages that: the wire saw bead, saw blade and engineering drill bit are made of steel material and designed according to the common specification, and the integral steel substrate is provided with a circular groove or a straight groove, and the circular groove or the straight groove is internally and externally filled and coated with mixed abrasive, so that the wire saw bead, saw blade and engineering drill bit are made into a grinding working layer after vacuum brazing, and the wire saw bead, saw blade and engineering drill bit are made into a grinding working layer, thereby being more beneficial to greatly prolonging the service life of tools and effectively improving the wear resistance and sharpness.
Detailed Description
The method for brazing the diamond compound material in vacuum and manufacturing the tool multilayer brazing comprises the steps of manufacturing a diamond grinding layer, wherein the diamond grinding layer comprises a mixed grinding material prepared by mixing Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, a framework material and diamond, and the mass percentage ratio of the Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, the framework material and the diamond is as follows in sequence: 60-80% of Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, 10-25% of framework material and 10-25% of diamond, wherein the Cu-Sn-Cr-Ti-Ni-Fe mixed metal powder comprises, by mass, 50-65% of Cu, 10-15% of Sn, 5-15% of Cr, 5-15% of Ti, 0.5-1.5% of Ni and 5-10% of Fe in sequence, the framework material is YG8, WC or Cr3C2, and the diamond is artificial diamond with the granularity of 60/70 meshes-25/30 meshes.
The diamond grinding layer is made of steel products according to the specification design of common diamond products, and is used for manufacturing base parts of a rope saw bead, a saw blade and a steel-concrete engineering drill bit, a clean annular groove or a straight groove is formed in each base part, a vacuum brazing diamond mixing grinding material is filled and coated inside and outside the clean annular groove or the straight groove, a grinding working layer is formed after vacuum brazing is carried out, the manufactured tool is a multilayer diamond vacuum brazing tool, the depth of the clean annular groove or the straight groove determines the thickness of the grinding working layer in the multilayer diamond vacuum brazing tool, the depth of a notch of the clean annular groove or the straight groove is 1-6 mm, and the width of the notch of the clean annular groove or the straight groove is 0.2-1 mm.
The vacuum brazing diamond mixed abrasive is uniformly mixed into a paste structure by utilizing a high molecular organic adhesive, the inside and the outside of a clean annular groove or a straight groove are filled and coated, the clean annular groove or the straight groove is a base body part in a rope saw bead string, a saw blade and a steel-concrete engineering drill bit which is designed according to common specifications by adopting a steel material product as a base body, a plurality of clean annular grooves or straight grooves are arranged on the base body part for pretreatment, surface oil stains are removed, sand blasting is carried out to remove iron rust and the like, the mixed vacuum brazing diamond mixed abrasive and the base body part are brazed and sintered together in a vacuum furnace, and the vacuum brazing diamond mixed abrasive and the base body part are taken out after being cooled.
When the brazing sintering is carried out in the vacuum furnace, the vacuum degree in the vacuum furnace is not lower than 1 multiplied by 10 < -2 > Pa, the brazing temperature in the vacuum furnace is 980-1050 ℃, the heat preservation time in the vacuum furnace is 5-10min, the sintered diamond mixed grinding material is taken out from the vacuum furnace, and the product can be taken out after being cooled to below 200 ℃.
The preparation method of the high molecular organic adhesive comprises the following steps:
1) 1-20 parts of butyraldehyde;
2) 5000 portions of anhydrous ethanol is adopted;
3) mixing 1-20 parts of butyraldehyde and 5000 parts of anhydrous ethanol;
4) heating the mixture of 1-20 parts of butyraldehyde and 2000-5000 parts of anhydrous ethanol at 40-60 ℃, stirring, and dissolving the butyraldehyde to the required viscosity.
The thickness of the vacuum brazing diamond compound abrasive coated on the outer side surface of the clean annular groove or the straight groove is 255-750 mu m.
The framework material mainly utilizes the oxidation resistance, high melting point and high thermal stability, the brazing filler metal which is melted and flowed in the high-temperature brazing can be effectively choked, so that sufficient metal matrix bodies are arranged among the diamonds in various groove gaps, sufficient active elements are generated on the surfaces of the diamonds to form metallurgical compounds, and a steel matrix, the matrix brazing filler metal and the diamonds are firmly welded, and meanwhile, the framework elements are added in a proper amount, the wear resistance is increased in a proper amount, and the wear resistance of the matrix body of the copper-based brazing filler metal is improved; the YG8 is in the form of alloy fragments, the particles are irregular in shape, the YG8 is prepared by crushing, coarse particles are easy to obtain, and the tool is economical and practical, has a cutting function and is suitable for large-particle diamond deep vacuum brazing tools; the WC is a common framework material, has uniform particles, and is suitable for reducing the high-temperature fluidity of the vacuum brazing filler metal; besides the Wc performance, the Cr3C2 can improve the weldability by adding a proper amount, and can obviously improve the welding strength of the matrix brazing material to the steel matrix and the matrix hardness.
YG8 is tungsten cobalt material. Good wear resistance, high melting point and good compatibility with the brazing filler metal. The heat stability and the wear resistance are good, and the service strength and the impact toughness are better than those of YG 6. The deep drawing die under the condition of large stress is suitable for drawing steel with the diameter of less than 50mm, nonferrous metal wires and alloy wires or rods thereof, and is also used for a stamping die and a rivet forging die with small size and low working load; YG8 advanced molding material; without heat treatment, the internal and external hardness is uniform.
The WC is a black hexagonal crystal. High melting point up to 2867 deg.C, and high chemical stability. Dissolving in mixed acid of nitric acid and hydrofluoric acid and aqua regia, and not dissolving in cold water; the active oxidation starts at the temperature of over 500 ℃ in the air, and the oxidation resistance is weak. The acid resistance is strong; the chemical reaction formula is as follows: w + C = WC (reaction at 1150 ℃); does not react with chlorine below 400 ℃; can react with fluorine violently at room temperature; oxidized to tungsten oxide when heated in air.
The Cr3C2 is gray powder and has metallic luster; an orthorhombic system; the density is 6.68 g/cm 3; the melting point is 1890 ℃, and the boiling point is 3800 ℃; the wear-resistant and corrosion-resistant composite material has good wear resistance, corrosion resistance and oxidation resistance in a high-temperature environment (1000-1100 ℃). Belongs to a metal ceramic.
The metal Cr3C2 powder is prepared by a carbonization method:
carbon black was pulverized into 325 mesh metallic chromium powder at a ratio of 13.5 to 64 mass% (more than the theoretical combined carbon amount of 11.33%) with electrolytic chromium, and the powder was dry-mixed by a ball mill to obtain a raw material. Adding 1-3% of stearic acid as a forming lubricant; pressing and molding with the pressure of 1T/cm; putting the pressure molding powder into a graphite disc or a crucible, heating to 1500-1700 ℃ in hydrogen flow (the dew point of hydrogen is about-35 ℃) by using a Taemann furnace or an induction heating furnace, keeping the temperature for 1h to perform carbonization reaction on chromium to generate chromium carbide, and cooling to prepare the chromium carbide; the reaction equation is as follows: 3Cr + 2C → Cr3C 2.
The existing data combined with the three existing framework materials have good metallurgical bonding with the Cu-Sn-Cr-Ti-Fe-Ni mixed solder and have wettability through repeated experiments, and the Cu-Sn-Cr-Ti-Fe-Ni mixed solder has good stability in a soldering temperature range.
The following table, deep vacuum brazed diamond tool and typical specification test list:
the table reaction, through repeated experiment comparison, the drilling or cutting and grinding efficiency of three typical specification products all have obvious improvement than the diamond tool that ordinary hot pressing was fired, and the life-span also has certain promotion, still possesses simultaneously and makes advantages such as simple and convenient, energy-concerving and environment-protective.
The technical solution of the present invention is illustrated by the following specific examples, but the scope of protection is not limited thereto:
example 1: the method for manufacturing the wire saw bead by using the vacuum brazing diamond and compounding the grinding material comprises the following specific steps:
(1) mixing three powders of mixed metal powder consisting of Cu-Sn-Cr-Ti-Fe-Ni, a framework material WC and diamond according to mass percentage to obtain the vacuum brazing diamond compound abrasive, wherein the three powders are sequentially as follows: 60%, 15% and 25%, using high molecular organic glue to prepare paste, the diamond is clean artificial diamond, the granularity is: 30/60, the diamond compounded abrasive has a thickness of 650 μm.
(2) The main substrate part of the diamond wire saw bead string is manufactured by 45 # steel bar according to the specification design of common diamond products, and a plurality of clean annular grooves are arranged on the substrate, the groove depth is as follows: 1.2mm, cleaning the substrate, removing rust, oil stain and the like, filling the pasty vacuum brazing diamond with the grinding material, and coating the mixture on the inner and outer surfaces of the annular groove of the bead string substrate.
(3) And (3) brazing and sintering the bead matrix filled and coated with the diamond mixed abrasive in a vacuum furnace, wherein the vacuum degree is not lower than 1 x 10 < -2 > Pa, the brazing temperature is 980 ℃, the heat preservation time is 15min, and the product can be taken out after cooling to below 200 ℃.
The method for obtaining the high-molecular organic adhesive comprises the following steps: 5 parts of butyraldehyde is added with 3000 parts of absolute ethyl alcohol, heated to 60 ℃, and stirred until the butyraldehyde is completely dissolved to the required viscosity. The following examples 2 and 3 are the same.
Example 2: the method for manufacturing the saw blade by compounding the vacuum brazing diamond with the grinding material comprises the following specific steps:
(1) mixing Cu-Sn-Cr-Ti-Ni-Fe mixed metal powder, framework material WC and diamond powder to obtain the vacuum brazing diamond compound abrasive, wherein the mass percentage of the three powders is as follows in sequence: 60%, 25% and 15%, using high molecular organic glue to prepare paste, the diamond is clean artificial diamond, the granularity is: 25/40, the diamond compounded abrasive has a thickness of 750 μm.
(2) The main substrate part of the diamond circular saw blade is manufactured by a No. 50A steel plate according to the specification design of common diamond products, a plurality of straight grooves are arranged on the substrate, and the groove depth is as follows: 6 mm. The substrate is cleaned to remove rust, oil stains and the like, and the pasty vacuum brazing diamond is filled with the abrasive material and coated on the inner and outer surfaces of the straight groove of the circular saw blade substrate.
(3) And brazing and sintering the circular saw blade matrix filled and coated with the diamond compound abrasive in a vacuum furnace, wherein the vacuum degree is not lower than 1 x 10 < -2 > Pa, the brazing temperature is 1050 ℃, the heat preservation time is 10min, and the product can be taken out after cooling to below 200 ℃.
Example 3: the method for manufacturing the steel-concrete engineering drill bit by using the vacuum brazing diamond mixed with the grinding material comprises the following specific steps:
(1) mixing Cu-Sn-Cr-Ti-Ni-Fe mixed metal powder, framework material WC and diamond powder to obtain the vacuum brazing diamond compound abrasive, wherein the mass percentage of the three powders is as follows in sequence: 70%, 15% and 25%, using high molecular organic glue to prepare paste, the diamond is clean artificial diamond, the granularity is: 35/40, the diamond compounded abrasive had a thickness of 500 μm.
(2) The main base body component of the diamond engineering drill bit is made of No. 30 steel pipe material according to the specification design of common diamond products, a plurality of straight grooves with the depth of 4.5mm are arranged on the base body, the base body is cleaned, rust, oil stain and the like are removed, and the paste-shaped vacuum brazing diamond is mixed with abrasive materials to be filled and coated on the inner surface and the outer surface of the straight grooves of the drill bit base body.
(3) And brazing and sintering the drill bit matrix filled and coated with the diamond mixed abrasive in a vacuum furnace, wherein the vacuum degree is not lower than 1 x 10 < -2 > Pa, the brazing temperature is 1000 ℃, the heat preservation time is 10min, and the product can be taken out after cooling to below 200 ℃.
The improvement of the deep vacuum brazing process of the product, along with the application of the flow resistance of the framework material, on one hand, various forming steel bodies or graphite molds are not used, and the using amount of the matrix alloy material is also greatly reduced. And the ordered arrangement of the diamonds in the working motion track direction can be relatively realized. Compared with the hot-pressed sintered diamond tool, the service life is improved by 30-50%, and the cutting or drilling speed can also be improved by 30-50%; the flowing melting vacuum brazing material is easy to ensure the welding strength, and the expanded application of the thin-wall diamond cutter tooth can be realized by improving the welding strength.
The product can replace part of diamond tools of electroplating process by mainly providing a single-layer diamond tool for the traditional vacuum brazing, and the current situation that the sharpness and the durability are not as good as those of hot-pressed sintered diamond tools is applied, and the problems that the traditional hot-pressed or cold-pressed sintered diamond tools are large in material waste, not firm in diamond bonding, not high in exposure, easy to fall off, not high in sharpness, low in comprehensive utilization efficiency and the like are solved.
Claims (1)
1. The method for vacuum brazing of diamond compound and manufacturing tool multilayer brazing is characterized in that: the diamond grinding layer is prepared by mixing a mixed grinding material, a framework material and diamond, wherein the mixed grinding material comprises Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, the framework material and the diamond, and the Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, the framework material and the diamond are sequentially in mass percentage: 60-80% of Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder, 10-25% of framework material and 10-25% of diamond, wherein the Cu-Sn-Cr-Ti-Fe-Ni mixed metal powder comprises, by mass, 50-65% of Cu, 10-15% of Sn, 5-15% of Cr, 5-15% of Ti, 0.5-1.5% of Ni and 5-10% of Fe in sequence, the framework material is YG8, WC or Cr3C2, the diamond is artificial diamond with the granularity of 60/70 meshes-25/30 meshes, the diamond grinding layer is made of steel base parts of wire saw beads, saw blades and steel mixed engineering drill bits by designing the material products according to the specifications of common diamond products, and the base parts are provided with clean annular grooves or straight grooves, filling and coating a vacuum brazing diamond mixed abrasive inside and outside a clean annular groove or a straight groove, forming a grinding working layer after vacuum brazing, wherein the prepared tool is a multilayer diamond vacuum brazing tool, the depth of the clean annular groove or the straight groove determines the thickness of the grinding working layer in the multilayer diamond vacuum brazing tool, the depth of a notch of the clean annular groove or the straight groove is 1-6 mm, the width of the notch of the clean annular groove or the straight groove is 0.2-1 mm, the vacuum brazing diamond mixed abrasive is uniformly mixed by using a macromolecular organic adhesive to form a paste structure, the inside and the outside of the clean annular groove or the straight groove on the base part of the multilayer diamond brazing tool are filled and coated, the mixed vacuum brazing diamond mixed abrasive is brazed and sintered in a vacuum furnace, and the cooled and taken out, when the vacuum brazing and sintering are carried out in the vacuum furnace, the vacuum degree in the vacuum furnace is not lower than 1 multiplied by 10 < -2 > Pa, the brazing temperature in the vacuum furnace is 980 and 1050 ℃, the heat preservation time in the vacuum furnace is 5 to 10min, the sintered diamond mixed abrasive is taken out of the vacuum furnace, and the product can be taken out after being cooled to below 200 ℃;
the preparation method of the high molecular organic adhesive comprises the following steps:
1) 1-20 parts of butyraldehyde;
2) adopting 2000-5000 parts of anhydrous ethanol;
3) mixing 1-20 parts of butyraldehyde and 5000 parts of anhydrous ethanol;
4) heating a mixture of 1-20 parts of butyraldehyde and 2000-5000 parts of anhydrous ethanol to 40-60 ℃, stirring until the butyraldehyde is completely dissolved to the required viscosity;
the thickness of the vacuum brazing diamond compound abrasive coated on the outer side surface of the clean annular groove or the straight groove is 255-750 mu m.
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| CN106194036B (en) * | 2016-08-30 | 2018-07-06 | 桂林特邦新材料有限公司 | Middle low temperature brazing diamond bit and preparation method thereof |
| CN106881671B (en) * | 2017-02-24 | 2020-01-17 | 蓝思科技（长沙）有限公司 | Multilayer brazing diamond tool and preparation method thereof |
| CN107460480B (en) * | 2017-08-24 | 2022-08-23 | 广东工业大学 | Preparation device and method of diamond-containing coating |
| CN108161776A (en) * | 2017-12-19 | 2018-06-15 | 南京航空航天大学 | It is brazed diamond segment composite wheel |
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2020
- 2020-06-24 CN CN202010586538.0A patent/CN111687509B/en active Active
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