46 results about "Titanium carbonitride" patented technology

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 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.

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.

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 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 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 application belongs to the technical field of pdc drill bit device, disclose a kind of threaded nozzle, material and its casting method, threaded nozzle material mass fraction includes: titanium carbonitride solid solution 50%~55%, nickel 32%~38%, cobalt 3%~8%, chromium 3%~6%, other trace elements≤2%.Threaded nozzle includes: wing, thread, joint;Nozzle body lower end is provided with joint, nozzle body is provided with thread, nozzle body upper side is provided with wing.Ticn-based cermet, its hard phase component tic and tin are very stable carbide and nitride, while wc phase is more prone to oxidation.Ticn-based cermet in 5% nitric acid, 50% sodium hydroxide solution, its corrosion resistance is more than yg8 hard alloy, and the more bonding phase of ticn-based cermet, the better corrosion resistance.In the present application, threaded nozzle has better wear resistance, corrosion resistance and lower cost than hard alloy.

The present invention discloses an aluminum alloy powder containing in-situ self-generated submicron TiC(N) particles and its application. The TiC(N) particles can exist in two forms: nitrogen-doped TiC particles and titanium carbonitride particles. The present invention mainly includes the following steps: nitriding of titanium powder, preparation of mixed powder preforms, preparation of master alloys, preparation of multifunctional aluminum alloy powders, and application of the powders in 3D printing and hot pressing. The powder prepared by the present invention can obtain a high content of submicron TiC(N) particles dispersed on an aluminum matrix. During the rapid solidification process of 3D printing, they can serve as heterogeneous nucleation sites to significantly reduce their thermal cracking tendency and expand the processing window. During the hot pressing process, they can serve as a reinforcement phase to significantly improve the overall performance of sintered components and expand their application range.

The invention discloses a device and a method for measuring the rate of generating TiC and TiN by coke and titanium-containing blast furnace slag. The device comprises a reaction furnace; the crucible is arranged in the reaction furnace and is used for accommodating titanium-containing slag; one end of the connecting rod is connected with coke and extends into the reaction furnace, so that the coke is immersed into the titanium-containing slag; and the driving device is connected with the other end of the connecting rod and drives the connecting rod and the coke to rotate, so that the reduction reaction of the titanium-containing slag and the coke is completed in the rotating process. According to the scheme provided by the invention, the rotation measure is added, so that titanium carbonitride generated on the reaction interface of the slag and the coke in the measurement process can be quickly diffused into the slag and is closer to the actual environment that the slag in the blast furnace is in a flowing state, and the result generated by the titanium carbonitride can better reflect the actual condition.

The invention discloses an ultrahigh-temperature-resistant and wear-resistant ceramic-based composite material and a preparation method thereof, and belongs to the technical field of ceramic materials. The composite material is prepared from the following raw materials: polyacrylonitrile-based carbon fibers subjected to interface modification, allyl modified polycarbosilane, polysilazane, silicon carbide, boron carbide, titanium carbide, titanium carbonitride, cobalt, molybdenum, phenolic resin and a silane coupling agent. The preparation method specifically comprises the following steps: (1) weighing the raw materials; (2) preparing a ceramic precursor; (3) performing liquid-phase dipping forming and low-temperature curing; (4) carrying out high-temperature thermalization and densification treatment; and (5) finishing a finished product. According to the invention, the carbon fiber is used as a reinforced framework, the silicon carbide ceramic is used as a matrix, and the density, high-temperature stability, hardness, fracture toughness and wear resistance of the composite material are improved through the design of the multi-component synergistically reinforced ceramic matrix and an advanced liquid phase preparation process, so that the comprehensive service performance of the composite material in an extreme environment is remarkably improved; the method can be used for aero-engine hot end components.

The invention belongs to the technical field of metal ceramic composite materials, and particularly relates to a material for a metal ceramic cutter and a preparation method of the material. The material for the metal ceramic cutter is prepared from the following raw materials in percentage by weight: 10 to 14 weight percent of metal binding phase, 6 to 13 weight percent of tungsten oxide whisker, 3 to 8 weight percent of tantalum and hafnium carbide powder and the balance of modified titanium carbonitride powder, the modified titanium carbonitride powder is prepared through the following preparation processes that copper salt and scandium salt are added into water to be dissolved, then titanium carbonitride is added for ultrasonic dispersion, the pH is adjusted to 8.5-9.5, then a heating reaction is conducted, filtering, washing and drying are conducted, and solid powder is obtained; and calcining the solid powder in a mixed gas atmosphere of nitrogen and hydrogen to obtain the modified titanium carbonitride. The material for the metal ceramic cutter has excellent high temperature resistance and excellent mechanical properties.

The invention provides a preparation method of a high-strength silicon dioxide aerogel composite material, and relates to the field of aerogel material preparation.The preparation method comprises the steps that S1, ethyl alcohol, polysilicate ester, silicate ester, a silane coupling agent with methyl, diluted hydrochloric acid and a functional additive are mixed, and sol A is obtained; s2, adding titanium carbonitride powder and molybdenum disulfide powder into the sol A to obtain sol B; s3, dropwise adding a urea ethanol solution into the sol B to obtain wet gel, and performing dipping compounding on the wet gel and the modified base material to obtain a wet gel composite material; s4, soaking the wet gel composite material in ethanol; and step S5, drying the soaked wet gel composite material. According to the method, the titanium carbonitride reinforced phase powder and the molybdenum disulfide powder are introduced in the gelation stage and are compounded with the modified base material, so that the strength and the wear resistance of the aerogel composite material are improved, and the service life of the aerogel composite material is prolonged.

A cermet, as a base, containing a plurality of hard particles and a bonded phase between the plurality of hard particles. Each of the plurality of hard particles, when viewed in cross section, includes a first region containing Ti, N, and C, and contains a titanium carbonitride phase as a main constituent. Each of the plurality of hard particles, when viewed in cross-section, includes a second region containing one or more metal elements selected from the group consisting of V, Nb, Ta, Cr, Mo, W, Co, and Ni in a larger amount than the first region. The content of the one or more metal elements in the second region is 9.5 mass % or more in a total amount. A cutting tool has a length extending from a first end to a second end, and includes a holder and the insert described above.

The invention relates to a layer system (1) for coating a metal substrate (2a) to form a flow field plate (2), comprising:-at least one cover layer (1a) made of a metal oxide; -at least one intermediate layer (1b) supporting the cover layer (1a); and-a lower layer (1c) supporting the intermediate layer (s) (1b); wherein the cover layer (1a) is formed of an indium tin oxide; wherein the indium tin oxide is doped with at least one element from the group including carbon, nitrogen, boron, fluorine, hydrogen, silicon, titanium, tin, and zirconium; wherein the at least one intermediate layer (1b) is formed from titanium nitride and / or titanium carbide and / or titanium carbonitride and / or titanium niobium nitride and / or titanium niobium carbide and / or titanium niobium carbonitride and / or chromium nitride and / or chromium carbide and / or chromium carbonitride; and wherein the lower layer (1c) is formed of titanium or a titanium-niobium alloy or chromium. The invention also relates to a flow field plate having a layer system (1) of this type, and to a fuel cell (10), an electrolytic cell or a redox flow battery having a flow field plate (2, 2 ') of this type.

A lightweight hard alloy comprising a hard phase with a core-rim structure, the lightweight hard alloy being obtained by sintering a mixed powder containing a titanium compound consisting of titanium carbide and / or titanium carbonitride as a main component, containing 5 to 33 mass% of W and / or Mo in terms of carbide, and containing 5 to 40 mass% of at least one binder phase component selected from the group consisting of Ni, Co and Fe, wherein in a cross-sectional structure of the lightweight hard alloy observed with a scanning electron microscope, the core phases having a core-rim structure have an average particle size of D90 or more on a number basis in the particle size distribution of the area circle equivalent diameter of the core phases, and the average Dmax / Dmin ratio of the shortest length Dmin to the longest length Dmax of the straight line connecting the center of gravity of the core phases of D90 or more to the outline is 2.0 or less.

This cutting tool comprises a substrate and a coating provided on the substrate. The coating includes an alumina layer provided on the substrate, an intermediate layer provided directly on the alumina layer, and a titanium carbonitride layer provided directly on the intermediate layer. The intermediate layer is made of titanium oxycarbonitride, and the titanium carbonitride layer is made of a compound represented by TixCyN(1-y). At a point A, which is 0.2 μm away from an interface I between the intermediate layer and the titanium carbonitride layer in a thickness direction toward the titanium carbonitride layer, an atomic ratio xA of titanium in the titanium carbonitride layer is 1.3 to 1.6, and an atomic ratio yA of carbon in the titanium carbonitride layer is 0.4 to 0.6. At a point B in the titanium carbonitride layer located on an opposite side of the interface I, which is 1.0 μm away from an interface J in a thickness direction toward the titanium carbonitride layer, an atomic ratio xB of titanium in the titanium carbonitride layer is 0.8 to 1.2, and an atomic ratio yB of carbon in the titanium carbonitride layer is 0.3 to 0.5. At a point C, which is the midpoint between point A and point B, an atomic ratio xC of titanium in the titanium carbonitride layer exceeds the atomic ratio xB and is less than the atomic ratio xA, and an atomic ratio yC of carbon in the titanium carbonitride layer is greater than the atomic ratio yB and less than the atomic ratio yA. The thickness of the intermediate layer is 0.5 μm to 1.5 μm, and the thickness of the titanium carbonitride layer is 1.5 μm to 3.5 μm.

The application discloses a kind of high-stability titanium carbonitride conductive fibers and its preparation method and application.The specific preparation method is as follows: titanium carbonitride fiber precursor film doped with metal is prepared and collected by using electrostatic spinning process;Titanium carbonitride fiber precursor film is pre-oxidized and pyrolyzed.The prepared titanium carbonitride conductive fiber has the characteristics of high stability, high conductivity and flexibility, and can be widely used in electrochemical energy storage and conversion process.

Provided is an ultra-fine cemented carbide that has high hardness and exhibits excellent transverse-rupture-strength. The ultra-fine cemented carbide includes a hard phase, containing tungsten carbide (WC) as a main component, in an amount of 80 wt % or more and 99.4 wt % or less, a carbonitride phase, containing titanium carbonitride (Ti(C,N)) as a main component produced by carbonitriding of a titanium (Ti) oxide during sintering, in an amount of 0.1 wt % or more and 10.0 wt % or less, and a binder phase, containing at least one selected from cobalt (Co), nickel (Ni), or iron (Fe) as a main component, in an amount of 0.50 wt % or more and 20 wt % or less, and the binder phase contains chromium carbide (Cr3C2) in an amount of 0.10 wt % or more and 20.0 wt % or less based on all of the binder phase, and in the ultra-fine cemented carbide, the hard phase, the carbonitride phase, and the binder phase total 100 wt %, WC after the sintering has an average grain size of 1.0 μm or less, the nitrogen content is 0.10 wt % or more and 1.25 wt % or less, and the carbon content is 4.80 wt % or more and 6.30 wt % or less.

The coated tool (1) disclosed herein comprises: a first surface (5); a second surface (7); a cutting edge (11) located at least on a portion of the ridgeline of the first surface (5) and the second surface (7); a third surface (9) located on the opposite side of the first surface (5); and a through hole (15) extending from the first surface (5) to the third surface (9). The inner wall (17) constituting the through hole (15) comprises a binder phase-rich layer (19) having a higher binder phase content than the interior of the substrate (3) at least in the central portion. The thickness T1 of the binder phase-rich layer (19) at the central portion is thicker than the thickness T2 of the binder phase-rich layer (19) at the end portion of the inner wall. The coating layer (30) is located at least on the binder phase-rich layer (19). The coating layer (30) comprises a first layer (31) comprising cubic titanium carbonitride. The orientation coefficient Tc(220) of the titanium carbonitride of the first layer (31) is 3.0 or more based on X-ray diffraction analysis.