26 results about "Superhard material" patented technology

This application relates to a polycrystalline diamond composite substrate, belonging to the technical field of superhard material composites. It includes a cylinder with one end serving as a bonding surface; a frustum located at one end of the bonding surface, comprising a truncated cone coaxially transitioning onto the cylinder and a frustum coaxially connected to the truncated cone; and a raised structure disposed on the frustum, comprising multiple sets of coaxially arranged raised units, each set of raised units being evenly distributed in a ring around the center of the bonding surface, with grooves formed between adjacent raised units, the grooves being concentric with the bonding surface. This application allows external forces applied to the composite to be more evenly distributed across different parts of the substrate, avoiding localized stress concentration. The raised structure increases the contact area between the substrate and the diamond layer, significantly enhancing the adhesion between them. During drilling, the diamond layer adheres more firmly to the substrate, reducing the risk of premature detachment of the diamond layer due to external forces.

This invention belongs to the field of superhard material synthesis technology, specifically disclosing a high-temperature, high-pressure preparation method for nano-polycrystalline diamond with synergistic mechanical and thermal properties. The method includes the following steps: precursor preparation: pre-pressing the precursor in a cemented carbide mold; octahedral assembly; wrapping the pre-pressed sample with platinum foil and placing it at the center of the octahedron; high-temperature, high-pressure sintering; stopping heating after heat preservation, allowing it to cool naturally to 23-25°C, then depressurizing, removing the octahedral assembly and the platinum foil wrapping, thus obtaining the synergistically enhanced nano-polycrystalline diamond. This invention employs the above-mentioned high-temperature, high-pressure preparation method for nano-polycrystalline diamond with synergistic mechanical and thermal properties. By combining nanodiamond powder with graphene, the sample assembly is optimized, and nano-polycrystalline diamond samples with excellent mechanical properties and significantly improved thermal conductivity are synthesized under relatively mild temperature and pressure conditions.

This application relates to the field of superhard materials technology, specifically disclosing a method for preparing polycrystalline diamond composite sheets and their application in drill bits. The method for preparing the polycrystalline diamond composite sheet includes the following steps: S1, molding and sintering WC powder and Co to obtain a cemented carbide substrate; S2, grafting multi-walled carbon nanotubes with free radicals to obtain modified multi-walled carbon nanotubes; S3, surface-treating diamond micropowder to obtain modified diamond micropowder; S4, processing the modified diamond micropowder, modified multi-walled carbon nanotubes, N-rGO, Ti powder, etc., to obtain a powder, which is then combined with the cemented carbide substrate to obtain the polycrystalline diamond composite sheet. This application uses modified diamond and composite reinforcing phases to solve the problems of weak interfaces and thermal stress concentration within the polycrystalline diamond composite sheet, while simultaneously improving structural integrity and impact resistance at high temperatures.

The application relates to the field of boring equipment, and discloses a novel precision boring machining equipment and method for an axle of superhard material, which comprises a base, a jig mechanism and two groups of boring mechanisms, the two groups of boring mechanisms and the jig mechanism are arranged on the upside of the base, the boring mechanism comprises a machine box, a sliding assembly, a rotating assembly, a tool holder assembly and a power assembly, the suction mechanism comprises a frame, a stand and two groups of gathering assemblies, the stand is vertically and fixedly installed at the top of the middle part of the jig mechanism, the frame is vertically and fixedly installed at the top of the stand, the two groups of gathering assemblies are symmetrically and vertically arranged on the two sides of the frame, the gathering assembly comprises a plate body, an electromagnet device and a cleaning part, the plate body is vertically and fixedly installed in the frame, the electromagnet device is vertically and fixedly embedded in the outside of the plate body, the cleaning part is arranged in the frame, and the output end of the suction device is communicated with the two groups of boring mechanisms through two groups of pipeline assemblies. The application solves the problem that metal chips lack efficient and timely cleaning means, thereby affecting the precision of holes.

This invention relates to the fields of laser surface engineering and superhard material coating technology, specifically to a wear-resistant workpiece with a diamond composite coating and its preparation method. The wear-resistant workpiece includes a substrate with multiple pits, at least some of which are embedded with first diamond particles. A first brazing filler metal is disposed on the substrate, partially filling the pits and coating the first diamond particles. A metal-based diamond composite coating is disposed on the first brazing filler metal, comprising a second brazing filler metal and second diamond particles. First, a pit array is etched on the substrate using a femtosecond laser to fill the pits with the first diamond particles. A metal binder is then coated inside the pits and on the substrate surface. Then, a cladding layer is formed by coaxial powder-feeding laser cladding, resulting in a two-layer composite wear-resistant structure with a substrate embedding layer and a surface cladding layer. This effectively increases the thickness of the wear-resistant layer, significantly improves the wear resistance of the workpiece, and extends its service life.

The utility model relates to superhard material processing technical field, and disclose a kind of PCBN composite sheet edge strengthening treatment device, including rack, rotary workbench, laser processing module, coating deposition module and control system.The PCBN composite sheet edge strengthening treatment device, in combination with laser microstructured processing and nanometer coating deposition, significantly improve the hardness, wear resistance and bonding strength of PCBN composite sheet edge, solve the problem of single technical effect limited, rotary workbench design realizes the continuous processing of multiple PCBN composite sheets, improves production efficiency, reduces cost, accurately controls each module parameter by PLC system, ensures the consistency and stability of processing, reduces manual intervention, integrates laser processing, coating deposition and cooling system in one, compact structure, easy to operate.

The application provides a nano-diamond compact and a preparation method and application thereof, and belongs to the technical field of diamond compacts. The nano-diamond compact provided by the application comprises a hard alloy substrate and superhard material hot-pressed on the surface of the hard alloy substrate, and the superhard material is prepared from raw materials with the following mass percentage: diamond micro powder 85-95.5%; cubic boron nitride 1.5-6%; tungsten carbide 1-3%; cobalt powder 1-5%; tantalum powder 0.5-3%; vanadium powder 0.2-3%; and graphene 0.1-1%. The cubic boron nitride, the tungsten carbide and the graphene can toughen and strengthen the nano-diamond compact; the cobalt powder, the tantalum powder and the vanadium powder can catalyze and bond. The nano-diamond compact has good toughness, and can effectively avoid the cracking of the nano-structure diamond compact.

A method of testing a superhard polycrystalline construction having a body of polycrystalline superhard material with a work face and a peripheral side surface, incudes contacting one or other of the work face or the peripheral side surface with a body of material forming an applied load until a crack and / or chip forms in the body of polycrystalline superhard material and recording the applied load required to achieve cracking and / or chipping.

The application relates to a high-voltage silicon-carbon composite material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a surface-modified conductive superhard material, an organic silicon resin and a crosslinking agent to form a mixture; heating and curing the mixture under vacuum conditions to obtain a cured material; performing carbonization treatment on the cured material to obtain a carbonized product; performing activation treatment on the carbonized product to obtain a porous carbon material; performing nano-silicon deposition on the porous carbon material to obtain a precursor material; performing carbon coating treatment on the precursor material to obtain a high-voltage silicon-carbon composite material containing Si-C bonds, Si-O-Si bonds and C-C bonds; the prepared high-voltage silicon-carbon composite material has the characteristics of low resistivity, high electronic conductivity, high voltage resistance and small expansion; when the high-voltage silicon-carbon composite material is used as negative active material to prepare an electrode sheet and assemble a lithium ion battery, the first cycle coulomb efficiency of the battery assembled after the electrode sheet is pressed can be improved, the battery volume expansion is reduced, and the cycle stability of the battery is improved.

The present application relates to the field of superhard material, and particularly relates to a kind of corrosion-resistant diamond compact.The diamond compact includes corrosion-resistant base body and polycrystalline diamond layer.The polycrystalline diamond layer includes cobalt, nickel, tantalum;The method for preparing corrosion-resistant diamond compact includes the following steps: step 1: corrosion-resistant base body preparation, tungsten carbide powder, cobalt powder, nickel powder, chromium powder and tantalum powder are mixed, and vacuum sintering is carried out after compression molding, to obtain corrosion-resistant base body;Step 2: diamond micro powder is mixed with catalyst, then loaded into high-temperature metal cup, then loaded into the above-mentioned corrosion-resistant base body and packaged, and then loaded into high-temperature high-pressure container;Step 3: high-temperature high-pressure synthesis sintering, the high-temperature high-pressure container is placed into six-surface pressing machine, and pressure and heating are carried out, to obtain diamond compact;The corrosion-resistant diamond compact in the present application can be applied to drilling operation in the presence of acidic liquid or corrosive gas and greatly improve the corrosion resistance of diamond compact.

The utility model discloses a kind of low-energy-consumption high temperature high pressure optimization CVD cultivation diamond device, belong to superhard material processing field.Device includes talc schist composite block, talc schist ring one, steel cap one, dolomite filling core one, porcelain sheet one, graphite sheet one, temperature ring one, small graphite sheet one, dolomite ring one, mixed heat source one, outer insulation tube, graphite tube, inner insulation tube, filling sheet one, filling medium CVD cultivation diamond, filling sheet two, mixed heat source two, dolomite ring two, small graphite sheet two, temperature ring two, graphite sheet two, porcelain sheet two, dolomite filling core two, steel cap two, talc schist ring two.Due to the use of relatively large steel cap can effectively reduce synthesis pressure, while using mixed heat source resistance value is high, heating rate is high, temperature distribution is more uniform, assembly adjustment is more convenient, effectively reduce the energy consumption of synthesis diamond large single crystal.

The present invention relates to a choke valve assembly for use in a fluid handling system. The choke valve assembly comprises a cage and sleeve choke. At least one part of the cage, the sleeve, or both is made of a superhard material.

The application discloses an agglomerated diamond accumulation composite material, a diamond accumulation sand disc and a preparation method thereof, and relates to the technical field of precision grinding and surface treatment of superhard materials. The application performs surface modification on the diamond by using a silane coupling agent, and combines the diamond with a resin bonding agent, and adds inorganic oxides such as zirconium oxide, aluminum oxide and silicon carbide, so that a high-strength diamond composite material is prepared through high-temperature sintering, the compression strength of the composite particles and the interface bonding density are significantly improved, the composite particles are closely arranged and the structure is stable during dry grinding and wet grinding, the self-sharpening property is strong, the composite particles are resistant to high temperature and do not creep, the interface of the abrasive tool substrate is treated by using the silane coupling agent, the high-strength bonding force between the resin bonding agent, the composite particles and the substrate is effectively enhanced, the finished diamond coated abrasive tool is free of flying pieces, flying filaments, particle dropping, delamination under the condition of high-speed rotation, and the comprehensive performance of the product is significantly better than that of the products on the market.

This invention belongs to the field of superhard materials and tools technology, and provides a multi-element alloyed tungsten carbide drill bit matrix material, its preparation process, and the drill bit itself. The multi-element alloyed tungsten carbide drill bit matrix material consists of a composite tungsten carbide hard phase, an Fe-Ni reinforcing phase, and a modified copper-based binder phase. The composite hard phase is a combination of spherical tungsten carbide and angularly cast tungsten carbide, while the binder phase is a multi-element modified copper-based alloy. The preparation process employs segmented heating and vacuum hot pressing sintering, followed by pre-sintering to remove impurities, high-temperature pressurization for densification, and slow cooling for molding, ensuring a stable and controllable process. This invention effectively solves the problems of traditional matrix materials, such as difficulty in achieving both hardness and toughness, insufficient interfacial bonding strength, and poor batch stability, through multi-phase synergistic strengthening. The resulting matrix material exhibits high hardness, good toughness, excellent wear resistance, and high-temperature oxidation resistance, meeting the drilling requirements of deep formations and complex working conditions. It is suitable for oil and gas drilling, geological exploration, and mining.

This invention discloses a halide solid electrolyte, its amorphization preparation method, and an all-solid-state battery, belonging to the field of all-solid-state battery technology. The invention discloses a method for preparing an amorphous halide solid electrolyte, using a low-cost superhard material with a Mohs hardness ≥7 and a particle size ≤50μm as the grinding material, and achieving complete amorphization of the electrolyte through mechanical ball milling. During ball milling, the superhard material physically breaks the long-range order of the electrolyte crystals, resulting in stable chemical properties and no impurities introduced. The periodic structure of the prepared amorphous electrolyte disappears, achieving three-dimensional isotropic ion transport. The ionic conductivity of lithium-based electrolytes is increased by several to tens of times, and that of sodium-based electrolytes by more than ten times, while also reducing the activation energy. This method is simple to operate, can directly use electrolyte raw materials or synthesized crystalline electrolytes as a substrate, and the product can be obtained by ball milling without the generation of toxic gases, making it suitable for large-scale industrial production.

The application relates to the field of intelligent welding processes and control, and discloses a welding method for a multilayer structure of a superhard material sealing body. The method comprises the following steps: acquiring multilayer structure data and generating a three-dimensional digital model; optimizing energy input parameters according to a heat affected zone and a stress concentration area to generate an initial energy tuning parameter set; collecting temperature field data and stress field data in a welding process according to the initial energy tuning parameter set to obtain a dynamic heat affected zone change trend; adjusting energy input and a scanning path according to the dynamic heat affected zone change trend to generate a corrected energy tuning parameter; controlling the depth distribution of energy in the multilayer structure according to the corrected energy tuning parameter to obtain a fusion depth and a heat affected zone distribution; and adjusting energy input and a scanning speed according to the fusion depth and the heat affected zone distribution to generate an energy input parameter set. The application improves the precision of energy control in the welding process.

The application discloses a back-bending type cubic press and a top hammer position pressure dynamic adjusting method, relates to the technical field of superhard material synthesis equipment, and comprises the following parts: two groups of end face racks; four groups of side face racks, which are matched with the two groups of end face racks and jointly form the overall rack structure of the back-bending type cubic press; a displacement sensor, which is arranged at the middle part of the outer side of the end face rack and the side face rack and is used for collecting displacement data of the end face rack, the side face rack and a hydraulic cylinder; the hydraulic cylinder, which is arranged at the middle part of the inner side of the end face rack and the side face rack and provides hydraulic power output for the pressing operation of the back-bending type cubic press; and a hinge beam shape correcting mechanism, which is arranged at the outer side of the side face rack and is used for correcting the deformation of the side hinge beam of the side face rack. The beam body in the application adopts a unique back-bending type structure design, and a method for real-time and collaborative dynamic adjustment of the top hammer position and the applied pressure during the pressing process is provided, so that the beam body is always in the optimal stress state.

This utility model relates to the field of superhard materials technology and discloses a cavity structure for synthesizing eight high-performance petroleum composite sheets. The cavity structure includes two synthesis blocks; each synthesis block includes an insulating block with a cavity; an assembly structure is provided within the cavity of the insulating block; the assembly structure includes a conductive steel cap, an insulator, a conductive sheet, a heating tube, a heat insulation sleeve, and a synthesis column; a material hopper is provided inside the heat insulation sleeve, and the synthesis column is placed inside the material hopper. This cavity structure allows for the simultaneous synthesis of eight petroleum composite sheets while achieving higher internal pressure, reaching 10 GPa, significantly improving the synthesis efficiency of high-performance petroleum composite sheets while reducing synthesis costs.

This invention belongs to the field of superhard materials technology, specifically relating to a highly dense graphite-coated diamond powder, its preparation method, and its application. The method includes the following steps: S1, heating the diamond powder to a certain temperature under vacuum conditions and performing a first etching treatment on the diamond powder using high-energy plasma; S2, under vacuum conditions, using low-temperature plasma chemical vapor deposition (PSCVD) with a carbon source and protective gas, depositing a carbon coating on the diamond powder surface; S3, under vacuum conditions, performing a second etching treatment on the surface of the obtained carbon coating using high-energy plasma to obtain highly dense graphite-coated diamond powder. This invention prepares a graphite layer on the surface of diamond powder, forming a graphite-diamond composite powder, which can solve the problem of insufficient wear resistance in synthesized PDC composite sheet materials due to the low density of diamond powder.

A valve assembly for use in a gas lift. The valve assembly having a valve member including a tip and a stem, and a valve seat including a body and a seating ring. At least a portion of the valve member and / or valve seat being formed from a superhard material.

The application relates to the technical field of superhard material precision machining, in particular to a ZrO2 gem special a-SiC ceramic grinding wheel, the grinding wheel contains alpha-SiC 70%-80%, a binder 5%-10%, a wetting agent 25%-30% and a binding agent according to the weight percentage; the alpha-SiC is a mixture of 150# and 180#, the binder is 800-mesh water-soluble beta-cyclodextrin powder, and the wetting agent is water-soluble beta-cyclodextrin liquid; the binding agent is made by mixing and ball milling of analytical pure SiO2, Al2O3, KOH, low-melting-point borosilicate glass powder and nanometer ice crystals in a specific ratio; the preparation method comprises the steps of mixing, pressing, drying, sintering and the like, and a three-dimensional mixing machine and a high-temperature sintering furnace are adopted; the grinding wheel is used for ZrO2 gem precision grinding, the grinding parameters are a rotating speed of 45 m / s, an infeed amount of 0.015 mm and a grinding allowance of 0.05 mm, the roughness Ra after grinding is less than or equal to 0.2 microns, and the service life is greater than or equal to 12000 gemstone finishing times; the grinding wheel can solve the problems of the precision, efficiency and surface defects of ZrO2 gem grinding in the prior art, and has excellent comprehensive performance.

This invention discloses a deep learning-based system for optimizing laser grooving process parameters in grinding wheels, belonging to the field of laser processing technology. It includes: a multi-dimensional physical property sensing unit for online measurement of the dynamic thermophysical parameters of the grinding wheel; a physical constraint deep learning prediction engine, whose loss function embeds Fourier's law of heat conduction as a soft constraint and corrects the laser absorptivity of the superhard abrasive through an optical scattering correction factor; a cross-domain small-sample transfer enhancement module, utilizing a physically consistent generative adversarial network and hierarchical multi-kernel maximum mean difference to achieve model transfer; a multi-objective process parameter optimization center, introducing hardware dynamic response constraints and searching for optimal parameters; and a closed-loop monitoring and adaptive adjustment module, integrating a coaxial spectral monitoring device to determine the oxidation level in real time and dynamically adjust the laser parameters. This invention solves the problems of prediction distortion in purely data-driven models and data sparsity in superhard materials, achieving high-precision physically consistent prediction and closed-loop stable control of processing quality.

This invention relates to the field of superhard material manufacturing technology, specifically to a rare-earth-doped high-performance polycrystalline diamond composite sheet and its preparation method. The composite sheet includes a cemented carbide matrix and a polycrystalline diamond layer sintered thereon. The polycrystalline diamond layer comprises diamond micron powder, a binder, and rare-earth additives. The rare-earth additives are one or more elements selected from neodymium, praseodymium, dysprosium, terbium, europium, samarium, yttrium, terbium, lanthanum, cerium, yttrium, and neodymium, or one or more of their oxides or carbides. The content of the rare-earth additives in the polycrystalline diamond layer is 0.1-5.0 wt%. This invention addresses the problem that in existing technologies, the bonding between diamond and binders such as cobalt is mainly physical encapsulation and weak chemical interaction, which can easily become a failure initiation point under high temperature, high pressure, or impact loads.

This invention relates to the field of polishing materials technology, and more particularly to a high-precision polishing leather specifically for sapphire superhard materials and its preparation method. The leather comprises a flexible base fabric layer, a buffer transition layer, and a high-hardness polishing surface layer stacked sequentially. The flexible base fabric layer is composed of a blend of aramid fibers and polyester fibers. The buffer transition layer contains polyurethane and nano-alumina. The high-hardness polishing surface layer contains diamond micropowder and polyimide. The advantages of this invention are that through the synergistic effect of the three-layer structure and material optimization, it significantly improves the wear resistance, interlayer bonding strength, and polishing precision of the polishing leather, achieving a surface finish of Ra≤0.01μm for polished sapphire. It can process 120-150 sapphire substrates per square meter, with a product qualification rate ≥98%, and uses water-based materials throughout the process, resulting in environmentally friendly and residue-free polishing. This invention can be widely applied to high-precision polishing of superhard materials such as sapphire substrates, window films, and lenses.