78 results about "Titanium carbonitride" patented technology

The invention belongs to the field of metal processing, and relates to an in-situ self-generated NiMoCoAlTi high-entropy alloy toughened metal ceramic material and a preparation method thereof. According to the invention, Ti (C, N) ceramic is used as a matrix, Ni, Mo, Co, Al and Ti are directly added as binders, and spark plasma coupling high-frequency induction sintering is carried out to obtain the high-temperature-resistant ceramic. The preparation method comprises the following steps: firstly, mixing Ti (C, N), Ni, Mo, Co, Al and Ti, then carrying out ball milling and drying to obtain powder, and carrying out spark plasma coupling high-frequency induction sintering. The method is beneficial to improving the mechanical property of the material, saves the preparation time of the high-entropy alloy powder, and has the advantages of being simple in preparation method, convenient to operate and the like. The obtained titanium carbonitride-based metal ceramic has higher toughness and hardness and excellent antifriction and wear-resisting properties, and can be used for manufacturing high-precision numerical control machine tool guide rails and other wear-resisting and corrosion-resisting parts.

The invention provides a PCBN composite material and a preparation method thereof.The preparation method comprises the steps that two or more of zirconium oxide, titanium nitride, silicon nitride, titanium diboride, silicon carbide, titanium carbide, titanium carbonitride, aluminum oxide and aluminum nitride are mixed, and ceramic composite powder is prepared; the CBN micro powder and a metal binding agent are subjected to ball milling and mixing, and CBN pre-composite micro powder is prepared; mixing the CBN pre-composite micro powder with the ceramic composite powder to obtain a premix, placing the premix in a mold for pre-pressing to obtain a blank piece, and then assembling the blank piece for sintering to obtain a PCBN composite material; the mass percentage content of the ceramic composite powder is 5%-40%, the mass percentage content of the metal binding agent is 15%-30%, and the mass percentage content of the CBN micro powder is 45%-65%. According to the method, the toughness and the stability of the PCBN cutter can be improved on the premise of low content of CBN (Cubic Boron Nitride).

The invention discloses a titanium carbonitride-based metal ceramic alloy with a dispersive distribution micro-nano twin-crystal core ring structure and a preparation method thereof, the metal ceramic alloy comprises hard phase powder, hard phase powder, hard phase powder and hard phase powder, the hard phase powder comprises TiCN powder, TiC powder and WC powder, and the hard phase powder comprises TiC powder, TiC powder and WC powder; binding phase powder and multi-component alloy strengthening powder. According to the core-ring shell composite crystal grain, the core is 50-200 nm superfine TiCN crystal grains (high-hardness phase), and basic strength is provided; according to the annular shell, the core is wrapped with the oriented-growth TiCN whiskers with the large length-diameter ratio, the whisker bridging effect is formed, and the crack path is deflected. And dispersion bicrystal distribution: micron-sized coarse grains and submicron fine grains are in bimodal distribution according to the volume ratio of 7: 3, the coarse grains hinder crack propagation, and the fine grains inhibit grain boundary slippage. In-situ reaction strengthening: MoSiB and other components are added, a MoO / TiO self-lubricating film is generated in high-temperature friction, the wear rate is reduced, and negative wear is realized.

The invention relates to the technical field of hard alloy, in particular to a hard alloy composite coating and a preparation method thereof.The hard alloy composite coating comprises the following layer structures deposited in sequence: a matrix layer, hard alloy composed of, by mass, 8-10% of cobalt, 0.3-0.8% of chromium carbide and the balance tungsten carbide, a transition layer and a titanium nitride layer; plasma enhanced chemical vapor deposition equipment is adopted to deposit on the surface of the base body layer at 870-890 DEG C under the pressure of 200 MPa to form the gradient functional layer and the titanium carbonitride layer, and the carbon-nitrogen atom ratio of the gradient functional layer and the titanium carbonitride layer is changed from 1.2: 1 of the inner layer to 0.6: 1 of the outer layer in a gradient mode. According to the preparation method, through the design of the gradient functional layer, a continuous thermal expansion coefficient transition area is formed in the titanium carbonitride layer, so that the interface thermal stress and the interface crack density are greatly reduced, and the interface bonding strength of the hard alloy composite coating can be remarkably improved; and the layering resistance of the coating in high-speed cutting can be remarkably improved.

The invention discloses a wear-resistant special ceramic material and a preparation method thereof, and belongs to the technical field of special ceramic preparation. The wear-resistant special ceramic material comprises the following raw materials: zirconium silicate, zirconium oxide whiskers, titanium carbonitride, zinc oxide whiskers, magnesium oxide, petalite, cerium oxide, nickel-based alloy powder and the balance of aluminum oxide. The zirconium silicate, the zirconium oxide whisker, the titanium carbonitride, the zinc oxide whisker and the nickel-based alloy powder are used as combined additives, so that composite synergistic reinforcement and toughening of multiple phases are realized; compared with conventional aluminum oxide ceramics, the prepared wear-resistant aluminum oxide ceramic material has the advantages that the wear resistance, the fracture toughness and the thermal shock resistance are remarkably improved, and the performance requirements of more severe working environments can be met.

The invention discloses a titanium carbonitride-based metal ceramic material with high toughness and high compactness, titanium carbonitride is used as a hard matrix phase, tungsten carbide is used as an additive, FeCoCrNi is used as a binding phase, the mass ratio of entropy alloy in FeCoCrNi in the metal ceramic material is 12%-30%, and the mass ratio of tungsten carbide in the metal ceramic material is 20%. The invention also provides a preparation method of the titanium carbonitride-based metal ceramic material, which comprises the following steps: carrying out primary ball-milling mixing on iron, cobalt, nickel and chromium powder to obtain medium-entropy alloy binding phase powder, carrying out secondary ball-milling mixing on titanium carbonitride, the uniformly dried medium-entropy alloy binding phase powder and tungsten carbide powder, filling into a graphite mold after mixing, and carrying out compression molding to obtain the titanium carbonitride-based metal ceramic material. And carrying out spark plasma sintering on the titanium carbonitride-based metal ceramic material to prepare the titanium carbonitride-based metal ceramic material. According to the titanium carbonitride-based metal ceramic material and the preparation method thereof, the excellent mechanical property and the good molten aluminum corrosion resistance are achieved at the same time.

The utility model discloses a corrosion-resistant washing roller, which belongs to the technical field of washing rollers and comprises a stainless steel base body and a taper sleeve, the stainless steel base body and the taper sleeve are connected through a stainless steel partition plate, the taper sleeve is of a double-taper-hole structure, a groove is formed in the outer side face of the stainless steel base body, and a titanium carbonitride-based metal ceramic layer is filled in the groove. The problems that in the prior art, a washing roller on a washing machine for producing fibers is poor in corrosion resistance and abrasion resistance, the service life of the washing roller is short, and the quality of finished fiber products is affected are solved.

A Ti microalloyed Q355NH steel plate and its preparation method are disclosed, comprising the following components: C≤0.12%; Si: 0.20~0.35%; Mn: 1.0~1.2%; Ni≤0.30%; Cr: 0.40~0.60%; Cu: 0.25~0.35%; Ti≤0.03%; P≤0.02%; S≤0.01%. The beneficial effects of this invention are: by employing Ti microalloying technology, a trace amount of Ti is added to Q355NH steel, which combines with C and N to form fine titanium carbonitride particles, effectively refining the grains and producing a significant precipitation strengthening effect. Thus, while reducing the amount of microalloying elements such as Nb added, the strength, toughness, and weldability of the steel plate can still be guaranteed or even improved, reducing production costs. Simultaneously, these fine titanium carbonitride particles can pin grain boundaries, inhibiting grain coarsening in the weld heat-affected zone, further improving the weldability of the steel plate. Furthermore, the combination of this Ti microalloying technology with controlled rolling and controlled cooling processes can effectively refine and homogenize the microstructure of steel plates, significantly improving their comprehensive mechanical properties and atmospheric corrosion resistance.

The present invention proposes a powder standard sample comprising at least one of titanium carbonitride, titanium carbide, and titanium nitride; wherein the nitrogen content is 3% to 22%, the oxygen content is less than 1.0%, the hydrogen content is less than 0.05%, and the total impurity elements are less than 0.2%. When the powder standard sample is used for testing, the data is fitted into a working curve using a linear regression method with a linear coefficient of 0.9998, indicating good linearity. The resulting working curve meets the high nitrogen analysis range of refractory metals such as tungsten, titanium, tantalum, and niobium, as well as ceramic alloy samples, and provides stable, accurate, and reliable test results.

The invention discloses a high-impact-toughness titanium carbonitride-based metal ceramic alloy with a dispersed distribution micro-nano bicrystal structure and a preparation method of the high-impact-toughness titanium carbonitride-based metal ceramic alloy. The metal ceramic alloy comprises hard-phase powder, hard-phase powder and hard-phase powder, and the hard-phase powder comprises TiCN powder, TiC powder and WC powder; the bonding phase powder comprises Fe powder, Ni powder and Co powder; and a carbon and nitrogen balance powder, wherein the carbon and nitrogen balance powder comprises a carbon-containing Mo-Fe powder. A metal ceramic matrix of a micro-nano bicrystal structure is constructed on the microstructure, and a multi-stage, high-density, uniform and fine nano structure is separated out by utilizing the dispersion characteristic and interface reaction of nano composite powder; the Ti (C, N)-based metal ceramic with the strengthened and toughened micro-nano bicrystal structure is prepared through a powder metallurgy technology and a nitrogen partial pressure sintering process by combining interface regulation and control mechanisms of different doping elements and based on the combined action of mechanisms such as fine grain strengthening and second phase strengthening, and the bonding strength between metal ceramic matrix phase interfaces is improved.

This application provides an electrode comprising a first electrode material layer and a second electrode material layer disposed on the surface of the first electrode material layer. The first electrode material layer is made of titanium carbide doped with a metal, and the second electrode material layer is made of titanium carbonitride doped with the metal, wherein the doping metal includes at least one of aluminum and copper. The electrode provided by this application exhibits excellent corrosion resistance and low contact resistance. This application also provides a method for fabricating the electrode and an electronic device thereof.

The invention relates to a coated cutting tool. Specifically, the present invention relates to a coated cutting tool and a method of making such a coated cutting tool comprising a substrate coated with a multi-layer wear resistant coating comprising a layer of alpha-Al2O3 and a layer of titanium carbonitride, TixCyN1-y, deposited on the layer of alpha-Al2O3, where 0.85 < = x < = 1.3 and 0.4 < = y < = 0.85, wherein TixCyN1-y has a texture coefficient TC (hkl) measured by X-ray diffraction using CuK [alpha] radiation and [theta]-2 [theta] scan and defined according to the Harris formula, where I (hkl) is the measured intensity (integrated area) of (hkl) reflection; i0 (hkl) is the standard intensity according to the standard powder diffraction data of the JCPDS cards No. 42-1489; n is the number of reflections used in the calculation, and wherein the (hkl) reflections used are (1 1), (2 0), (2 0), (3 1), (3 1), (4 0) and (4 2); and TC (1 1) > = 3.

The invention discloses an easy-to-demould concrete mould and a preparation method thereof, and relates to the field of moulds, the easy-to-demould concrete mould comprises a mould body and a demoulding layer used for separating the mould body from concrete, and the demoulding layer is composed of at least three of titanium nitride, chromium nitride, tungsten nitride, titanium carbide, titanium carbonitride, chromium carbide and tungsten carbide. The concrete mold is manufactured through the mold body and the demolding layer formed by the multiple high-hardness materials, on one hand, the organizational structure of the metal carbon and / or nitride demolding layer material is greatly different from the organizational structure of concrete, adhesion between the concrete mold and a concrete workpiece is avoided as much as possible, and the demolding difficulty is reduced; and the concrete workpiece is difficult to damage the high-hardness demolding layer, so that the service life of the concrete mold is prolonged.

The invention discloses a titanium carbonitride-based metal ceramic, the calculation formula of the mass ratio of each component is Ti (C, N) 50WCxMo (50-x) / 4Ni (50-x) / 4Co (50-x) / 4Cr (50-x) / 4, in the formula, X represents the WC content, and the rest four elements of Mo, Ni, Co and Cr are in equal mass ratio and change along with the change of the WC content. The invention also discloses a preparation method of the titanium carbonitride-based metal ceramic, which comprises the following steps: S1, weighing according to the ratio of the raw materials, respectively putting the raw materials into a ball milling tank, and adopting absolute ethyl alcohol as a dispersion medium; continuously carrying out ball milling for 24 hours under the condition that the rotating speed is 300rpm; s2, slurry obtained through ball milling is dried, and dried powder is placed in a vacuum bag to be sealed and stored; s3, spark plasma sintering is adopted, the sintering temperature ranges from 1300 DEG C to 1500 DEG C, the sintering pressure is 35 MPa, and the heat preservation time is 10 minutes; and after sintering, the hard phase and the second kind of carbide dissolved in the liquid phase form an annular structure around the hard phase through recrystallization, so that a specific'core-ring 'microstructure of the Ti (C, N)-based metal ceramic is constructed.

A cutting tool comprising a substrate and a coating provided on the substrate, The coating is an alumina layer provided on the substrate; an intermediate layer provided directly on the alumina layer; a titanium carbonitride layer provided directly on the intermediate layer, the intermediate layer is made of titanium oxycarbonitride, The titanium carbonitride layer is Ti x C y N (1-y) The compound is represented by At a point A 0.2 μm away from the interface I between the intermediate layer and the titanium carbonitride layer toward the titanium carbonitride layer in the thickness direction, The atomic ratio x of titanium in the titanium carbonitride layer A is between 1.3 and 1.6, The atomic ratio y of carbon in the titanium carbonitride layer A is between 0.4 and 0.6, At point B, which is 1.0 μm away from interface J in the titanium carbonitride layer located on the opposite side of interface I in the thickness direction toward the titanium carbonitride layer, The atomic ratio x of titanium in the titanium carbonitride layer B is between 0.8 and 1.2, The atomic ratio y of carbon in the titanium carbonitride layer B is between 0.3 and 0.5, At point C, which is the midpoint between point A and point B, The atomic ratio x of titanium in the titanium carbonitride layer C is the atomic ratio x B Above the atomic ratio x A is less than The atomic ratio y of carbon in the titanium carbonitride layer C is the atomic ratio y B Above the atomic ratio y A is less than the thickness of the intermediate layer is 0.5 μm or more and 1.5 μm or less, The thickness of the titanium carbonitride layer is 1.5 μm or more and 3.5 μm or less.

The present invention relates to the technical field of ceramic substrate materials, and in particular to a silicon nitride-based composite ceramic substrate and a preparation method thereof. The silicon nitride-based composite ceramic substrate is composed of the following raw materials: 95-110 parts of silicon nitride, 4-8 parts of boron nitride whiskers, 7-14 parts of potassium hexatitanate whiskers, 22-38 parts of sintering aids, 14-20 parts of plasticizers, 6-15 parts of dispersants, 16-25 parts of binders, and 85-115 parts of organic solvents. By adding titanium carbonitride and zirconium tungstate to the silicon nitride-based substrate material, the present invention can not only improve the mechanical properties of the silicon nitride-based ceramic substrate, such as flexural strength and fracture toughness, but also further improve the bonding strength of the silicon nitride-based ceramic substrate to various metals such as titanium, nickel, and aluminum, thereby improving the overall reliability of the ceramic substrate.

The present invention relates to the technical field of coating materials, and specifically to a processing technology for an antibacterial high-strength refrigerator lower beam. The surface of the refrigerator lower beam has two coatings, including a metal layer coated on the surface of the refrigerator lower beam, and an antibacterial layer coated on the surface of the metal layer. The present invention prepares a graphene / titanium dioxide composite, performs a crystallization treatment on it, and then mixes it evenly with titanium carbonitride, cerium oxide, and sodium silicate. It adopts cold air power spraying technology to spray it onto the cleaned surface of the refrigerator lower beam to obtain a metal layer; the graphene / titanium dioxide composite that has not been crystallized is grafted and modified with chitosan and betaine to prepare a modified filler, and then it is mixed evenly with polyurethane grafted acrylic emulsion, sodium hydroxymethyl cellulose, sodium hexametaphosphate, an antibacterial agent, a film-forming aid, and deionized water to obtain an antibacterial coating; the antibacterial coating is evenly coated on the surface of the metal layer, and after curing, an antibacterial layer is obtained, and finally an antibacterial high-strength refrigerator lower beam is prepared.

The invention discloses manufacturing equipment for titanium carbonitride powder production and a manufacturing process thereof, and relates to the technical field of metal ceramic powder.The manufacturing equipment comprises a rack, a heating furnace, a conveying mechanism and a material conveying mechanism, and the material conveying mechanism comprises a feeding pipe, a discharging pipe and a powder processing module; wherein the feeding pipe and the discharging pipe are arranged on the two sides of the heating furnace respectively and connected with branch pipes, and the powder processing module is arranged on the branch pipes of the feeding pipe; the powder processing module comprises a base, the base is of a hollow structure, an outer barrel is fixed to the upper side of the base, the outer barrel is of a hollow structure, a first motor is fixed to the upper side of the outer barrel, an inner barrel is rotationally arranged in the outer barrel, and the driving end of the first motor is connected with the top of the inner barrel and used for driving the inner barrel to rotate; the inner barrel is of a hollow structure, and a circle of grinding blocks are arranged on the lower side. The powder state can be checked, and the production quality is improved.

The invention discloses a method for preparing titanium carbonitride powder by using a secondary sintering method, which comprises the following steps of: (1) a pre-sintering stage: filling a titanium dioxide and carbon black mixture into a container, putting the container into a heating device, introducing nitrogen, heating at the temperature of 1400-1600 DEG C, after the center temperature of the material reaches a set temperature, fully reacting, cooling and discharging to obtain a pre-sintered material; (2) a pre-sintering material mixing stage; (3) secondary sintering stage: adding the mixed pre-sintered material into a graphite boat, putting the graphite boat into a carbon tube furnace, and sintering at the sintering temperature of 1700-1900 DEG C, a proper amount of nitrogen flow and the boat pushing speed of 50-70 minutes per boat; the sintered material discharged from the furnace is a titanium carbonitride sintered product, and the titanium carbonitride sintered product is crushed to obtain a titanium carbonitride powder finished product. According to the method, through the two sintering processes, the charging amount of the graphite boat is increased, the productivity of a single graphite carbon tube furnace is improved, and meanwhile the quality of the titanium carbonitride powder is guaranteed.

The present application relates to iron-making technology field, propose a kind of for vanadium-titanium magnetite smelting blast furnace hearth structure and cooling control method, the blast furnace structure includes furnace bottom brick lining, hearth side wall brick lining and be located in the hearth side wall brick lining below furnace base;Furnace bottom brick lining and the outside of the hearth side wall brick lining is provided with smooth cast iron cooling wall, the inside of the furnace base is provided with cooling device;The furnace bottom brick lining is successively provided with heat preservation brick layer and heat-conducting brick layer from hearth bottom to furnace base direction, heat preservation brick layer includes dense clay brick and composite mullite brick, the heat-conducting brick layer is semi-graphite carbon brick;Hearth side wall brick lining is built with the composite mullite brick, and in the corner of hearth and furnace bottom, hearth side wall brick lining extends to form brick lining reinforcing structure in the direction of furnace in.The present application solves the problem of excessive deposition of titanium carbonitride caused by improper temperature gradient when smelting vanadium-titanium magnetite, inhibits the accumulation of hearth center and edge bonding, maintains the hearth active and blast furnace smooth.

The application provides a method for preparing titanium tetrachloride by using a fluidized bed, wherein the powder fluidization area and the cooling area are alternately arranged in the fluidized bed, the whole is in a rectangular structure, the powder material is added from one side of the fluidized bed, and is sequentially overflowed through several fluidization areas and cooling areas and then discharged from the outlet; the fluidization gas enters the fluidized bed through the distribution plate at the bottom of the fluidization area, and reacts with the added powder particles at a certain temperature to prepare titanium tetrachloride; and the cooling medium is sent from the bottom of the fluidized bed and discharged from the top outlet after heat exchange. The method uses the slag containing titanium carbide, titanium nitride or titanium carbonitride as the raw material, and reacts with chlorine gas, so that the reaction efficiency is high; the fluidized bed adopts the cross design of the fluidization area and the cooling area, so that the heat released by the chlorination reaction is discharged from the fluidized bed through the cooling medium in time, and the local heat release of the reaction is avoided, and the sintering of the material or even the dead furnace condition is avoided.

The present invention discloses a high thermal conductivity metal ceramic material and its preparation method and application, belonging to the technical field of metal ceramic materials. The metal ceramic material comprises porous titanium carbonitride-based ceramic particles, nickel-cobalt metal binder phase and silicon nitride whiskers, wherein the ceramic phase in the porous titanium carbonitride-based ceramic particles comprises WC, Mo2C, TaC, NbC, Cr3C2 and Ti(C,N). The preparation method comprises ball milling, granulating and carbonitriding the metal oxide raw material and carbon black to obtain porous titanium carbonitride-based ceramic particles, which are then further mixed with silicon nitride whiskers, nickel powder, cobalt powder and carbon black, pressed and sintered to obtain a high thermal conductivity metal ceramic material. While maintaining excellent antioxidant properties and high-temperature dimensional stability, the metal ceramic material also has high thermal conductivity, is particularly suitable for use with metal ceramic heat sinks, and can provide higher production efficiency and production stability for curved glass hot bending.

The application discloses a kind of ultra-high temperature resistant wear-resistant ceramic matrix composite material and preparation method thereof, belong to ceramic material technical field.The composite material includes the following raw materials: interface modified polyacrylonitrile-based carbon fiber, allyl modified polycarbosilane, polysilazane, silicon carbide, boron carbide, titanium carbide, titanium carbonitride, cobalt, molybdenum, phenolic resin and silane coupling agent;Preparation method specifically includes the following steps: (1) weighing raw materials;(2) the preparation of ceramic precursor;(3) liquid phase impregnation forming and low-temperature curing;(4) high-temperature thermalization and densification treatment;(5) finished product is completed.The application takes carbon fiber as reinforcing framework, takes silicon carbide ceramic as matrix, improves the denseness, high-temperature stability, hardness, fracture toughness and wear resistance of composite material by the design of ceramic matrix of multi-component synergistic strengthening and advanced liquid phase preparation process, so as to significantly improve the comprehensive service performance thereof in extreme environment, and can be used for aero-engine hot end component.

The embodiment of the invention provides a high-corrosion-resistance conductive composite coating of a titanium metal bipolar plate, a preparation method and the bipolar plate. The composite coating comprises a titanium mixed bottom layer, a gradient transition titanium carbonitride middle layer and an amorphous carbon surface layer from inside to outside. The thickness of the titanium mixed bottom layer is 0.2-0.5 mu m, and the titanium mixed bottom layer is formed through titanium ion implantation and deposition by combining high-power pulse magnetron sputtering with 15-25kV high-voltage pulse target table bias; the thickness of the titanium carbonitride middle layer is 0.3-0.5 mu m, the titanium carbonitride middle layer is deposited in a nitrogen and acetylene reaction atmosphere through high-power pulse magnetron sputtering, and the content of nitrogen atoms is gradually reduced from the position close to the titanium mixed bottom layer to the outside; the thickness of the amorphous carbon surface layer is 0.5 mu m-1 mu m, and the amorphous carbon surface layer is deposited on the surface of the titanium metal bipolar plate through high-power pulse magnetron sputtering assisted by an anode layer ion source. According to the technical scheme, preparation of the multilayer-structure high-corrosion-resistance conductive composite coating on the surface of the metal bipolar plate substrate can be achieved, the high-corrosion-resistance conductive requirements of the titanium metal bipolar plate of the hydrogen fuel cell are met, the performance of the hydrogen fuel cell is improved, the service life of the hydrogen fuel cell is prolonged, and the reliability of the hydrogen fuel cell is improved.

The invention discloses a method for preparing titanium carbonitride from titanium-containing blast furnace slag, which comprises the following steps of: smelting the titanium-containing blast furnace slag by using a three-phase alternating-current closed electric furnace with carbon, and converting TiO2 in the slag into low-valence titanium; and then nitrogen is used as carrier gas of a carbonaceous reducing agent to carry out opposite-direction jet air quenching on the obtained slag containing the low-valence titanium, and the titanium carbonitride particles are prepared. The method can effectively solve the problem existing in titanium resource extraction by smelting the titanium-containing blast furnace slag in a carbide furnace, and by changing the smelting process and utilizing the condition that titanium carbide and titanium carbonitride have similar physical and chemical characteristics, Ti (C, N) is used as a replacement product of TiC, and an air quenching deslagging process conforming to the process is matched, so that the titanium resource is extracted from the titanium-containing blast furnace slag. The smelting power consumption can be remarkably reduced, the product quality can be further improved, parameter control of the next procedure and improvement of the product yield are better facilitated, and the economic benefits are very obvious.

Provided is a lightweight hard alloy which is obtained by sintering a mixed powder that contains, as a main component, a titanium compound composed of titanium carbide and / or titanium carbonitride, contains 5-33 mass% of W and / or Mo in terms of carbide, and contains, as a binder phase component, 5-40 mass% of at least one metal selected from the group consisting of Ni, Co, and Fe, and which includes a hard phase having a core-rim structure. In the cross-sectional structure of the lightweight hard alloy observed by using a scanning electron microscope, the average particle diameter of a core phase having a diameter of D90 or more is 0.8-3.3 μm on a number basis in the particle size distribution of the area circle-equivalent diameter of the core phase of the hard phase having a core-rim structure, and the average of the ratio Dmax / Dmin of the minimum length Dmin to the maximum length Dmax of a straight line that connects the contour and the center of gravity of the core phase having a diameter of D90 or more is 2.0 or less.

The invention discloses a method for accurately measuring the content of titanium carbide and titanium nitride in titanium carbonitride. The method comprises the following steps: separating titanium nitride from titanium carbide by adopting a separation liquid ferric chloride (1.5 mol / L)-hydrochloric acid (4 mol / L)-benzotriazole (0.1%); filtering and fixing the volume to obtain a to-be-detected solution 1; titanium carbide is dissolved with nitric acid (2 + 1); filtering and fixing the volume to obtain a to-be-detected solution (2); respectively measuring the titanium content in the to-be-measured liquid (1) and the to-be-measured liquid (2) by using a spectrophotometric method, and respectively converting the titanium content into the titanium nitride content and the titanium carbide content; and calculating the dissolution rate of the separation liquid to the titanium carbide by adopting an empirical formula, and correcting an analysis result. According to the present invention, the ferric chloride (1.5 mol / L)-hydrochloric acid (4 mol / L)-benzotriazole (0.1%) is adopted to selectively dissolve the titanium nitride in the titanium carbonitride for the first time, such that the technical problem of simultaneous determination of the high-content titanium carbide and the high-content titanium nitride is solved; meanwhile, an analysis result is corrected by adopting an empirical formula, so that the content of titanium carbide and titanium nitride in titanium carbonitride is accurately measured.

The invention discloses equipment and a method for preparing titanium carbonitride powder. The method comprises the following steps: S1, respectively adding titanium dioxide powder and carbon powder into corresponding bins through sealed feed ports; s2, pre-drying and inert gas replacement; s3, the dried titanium dioxide powder and the dried carbon powder enter a ball mill through sealing pipelines to be ground; s4, mixed powder obtained after grinding enters a double-helix conical mixer to be mixed; s5, continuously feeding the uniformly mixed powder into a sealed reaction furnace, and collecting, combusting and discharging CO gas generated in the reaction process through a furnace tail exhaust pipeline; and S6, obtaining a high-purity titanium carbonitride powder finished product. According to the method, multiple times of transfer and exposure of the raw materials are reduced, the production efficiency is improved, the loss of the raw materials is reduced, the moisture absorption and caking risks are completely eradicated, and the product quality is ensured.

The present invention discloses a titanium carbonitride-based composite ceramic material, a preparation method thereof, and an application thereof in a mold core for precision glass molding. The titanium carbonitride-based composite ceramic material is composed of a ceramic layer coating a hard alloy core; wherein, the hard alloy is a WC-based hard alloy with a low binder phase, and the ceramic layer is a titanium carbonitride-based solid solution. This composite ceramic material has excellent oxidation resistance and chemical stability, and also has properties such as high density, good consistency after polishing, low roughness, and a thermal expansion coefficient matching that of glass, and is particularly suitable for preparing a mold core for precision molding of aspherical and curved glass.