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1114 results about "Titanium carbide" patented technology

Titanium carbide, TiC, is an extremely hard (Mohs 9–9.5) refractory ceramic material, similar to tungsten carbide. It has the appearance of black powder with the sodium chloride (face-centered cubic) crystal structure. As found in nature its crystals range in size from 0.1 to 0.3mm.

Refractory high-entropy alloy/titanium carbide composite and preparation method thereof

The invention discloses a refractory high-entropy alloy/titanium carbide composite. A refractory high-entropy alloy serves as a matrix phase, and titanium carbide serves as a wild phase; and elements in the refractory high-entropy alloy are selected from at least four kinds of elements of W, Mo, Ta, Nb, V, Ti, Zr, Hf and Cr. A preparation method of the refractory high-entropy alloy/titanium carbide composite comprises the steps that at least four kinds of carbonization metal powder in tungsten carbide, molybdenum carbide, tantalum carbide, niobium carbide, vanadium carbide, the titanium carbide, hafnium carbide, zirconium carbide and chromium carbide are selected and mixed according to the equal molar ratio or the ratio close to the equal molar ratio to form high-entropy matrix powder; and after the high-entropy matrix powder and titanium powder are mixed, alloy mechanization is carried out, then spark plasma sintering or hot-press sintering is carried out, and the refractory high-entropy alloy/titanium carbide composite is obtained. The density and cost of the composite are reduced while the hardness of the composite is improved, excellent high-temperature performance is achieved, and the requirement for manufacturing a high-temperature structural component is met.
Owner:江西咏泰粉末冶金有限公司

Method for preparing metal surface laser strengthened coat

The invention discloses a method for preparing a metal surface laser strengthened coat, which comprises the following steps: preparing uniformly mixed powder of titanium dioxide hydrate and graphite powder by using a wet chemistry method; pre-placing the mixed powder on the surface of a basal body; and irradiating the surface of the basal body by using laser as a heat source under an argon atmosphere to form a molten pool, performing a carbon-thermal chemical reaction on the pre-placed mixed powder under a high-temperature environment to generate titanium carbide, and finally forming a titanium carbide composite coat on the surface of the basal body. In the same way, the method is also suitable for preparing a TiN enhanced composite coat by mixing hydrated oxide thereof and graphite by the wet chemistry method, then mixing the mixture and urea to form pre-placed powder and cladding the pre-placed powder on the basal body by laser. The surface of the enhanced coat prepared by the technical scheme is smooth, and has no cracks or pores; enhancing particles are uniformly distributed in the coat; the enhanced coat and the basal body are metallurgically combined; and the mixed powder prepared by adopting the wet chemistry method is uniformly mixed, ensures complete reaction, and is suitable for industrial popularization and application.
Owner:姚建华

Multiple dispersion strengthening copper-base composite material prepared in situ and preparation method thereof

The invention discloses a multiple dispersion strengthening copper-base composite material produced in situ and a preparation method thereof; the reinforced phase comprises at least three of the following substances: titanium carbide, zirconium carbide, alumina, titanium boride, aluminum carbide, chromium oxide, zirconia, graphite and copper; wherein, the contents of titanium carbide, zirconium carbide, alumina, titanium boride, chromium oxide and zirconia are not less than 0.3% and not more than 5%, the content of aluminum carbide is not less than 0.1% and not more than 5%, the content of graphite is not less than 0.1% and not more than 1% and the balance is copper. The particle size of the reinforced phase is between 10nm to 10mu m. The preparation method adopts ball milling; pressing, sintering and squeezing processes and the technological parameters are optimized and controlled properly to obtain the multiple dispersion strengthening copper-base composite material. Because the in situ self-generation technology is adopted and various reinforced phase methods are combined, the material of the invention has higher high-temperature strength and better electroconductibility and anti-creep property compared with the traditional ceramic particle strengthening copper-base composite material.
Owner:WENZHOU HONGFENG ELECTRICAL ALLOY

Method of in situ synthetic steel bond hard alloy casting composite hammerhead and hammerhead

A method of an in situ synthetic steel bond hard alloy casting composite hammerhead adopts a vacuum lost foam casting technology, wherein Ti powder, graphite powder, W powder and metal powder are mixed, and are added with an adhesion agent to produce a powder coating paste, the powder coating paste is filled in a reinforcement groove or a hole of a working part of an expanded poly styrol (EPS) foaming plastic modal of a hammerhead casting, during the pouring process, the high temperature of liquid steel is utilized to initiate the self propagating synthesis reaction, the reactions of Ti plus C->TiC and W plus C->WC are carried out, so the TiC and WC-based hard alloy phases are formed, the liquid steel is filled into the clearance of a hard phase, so an in situ synthetic titanium carbide and tungsten carbide steel bond hard alloy is obtained, and the hard alloy is embedded in the steel base body of the working part of the hammerhead. When the hammerhead which is produced through the method of the in situ synthetic steel bond hard alloy casting composite hammerhead is used, because the hard alloy and the casting are completely, metallurgically and firmly combined together, the hammerhead has high wear resistance and impact resistance during the use, has a simple technological process, low production cost, and is applicable to large-scale industrial production.
Owner:KING STRONG MATERIAL ENG LTD

Method for preparing carbon nanoparticle/two-dimensional layered titanium carbide composite material

The invention relates to a method for preparing a carbon nanoparticle/two-dimensional layered titanium carbide composite material. The method includes the steps that a two-dimensional layered titanium carbide nano material MXene (Ti3C2/Ti2C) is prepared through hydrofluoric acid corrosion; the material MXene (Ti3C2/Ti2C) and monosaccharide are processed through ultrasonic treatment, vacuum impregnation, hydrothermal treatment and other steps, so carbon nanoparticles are generated between layers and on the surface of the MXene (Ti3C2/Ti2C) material, and the carbon nanoparticle/two-dimensional layered titanium carbide composite material is obtained. Raw materials which are not toxic and easy to obtain are adopted, the preparation process is simple, the technology is controllable, cost is low, repeatability is good, the layered structure of the prepared two-dimensional layered MXene (Ti3C2/Ti2C) is uniform and complete, the carbon nanoparticles are evenly distributed between the layers and on the surface of the MXene (Ti3C2/Ti2C) material, and the prepared composite material has the advantages of being large in specific surface area, good in conductivity, good in hydrophilic property and the like and can be used in the fields such as functional ceramic, wave-absorbing materials, supercapacitors and ion batteries.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Selective laser melting forming method for preparing titanium alloy component

The invention provides a selective laser melting forming method for preparing a titanium alloy component. The method comprises the steps as follows: firstly, after being subjected to ball-milling and mixing, titanium alloy powder is delivered to a selective laser melting quick forming device, and the titanium alloy component is formed according to a component CAD image imported into the selective laser melting quick forming device; secondly, during a forming process, a mixture of 35-45% of nitrogen and 55-65% of argon is input by the flow rate of 3-5 liter per minute at the same time, a self-propagating high-temperature synthetic reaction is performed on the titanium and the nitrogen under the temperature ranging from 1220 DEG C to 1480 DEG C so as to generate titanium nitride, and titanium carbide is generated through the reaction of the titanium and the carbon in graphite under the temperature ranging from 1260 DEG C to 1523 DEG C under the argon condition; thirdly, the titanium nitride and the titanium carbide generated from the reactions are melted with the titanium alloy component as an organic whole; fourthly, the formed titanium alloy component is subjected to segmental cooling. Through adopting the technical scheme of the method, the generated titanium alloy component has better abrasive resistance and corrosion resistance, and besides, the fact that the film layers of the traditional titanium nitride and titanium carbide composite coatings are easy to peel off from the titanium alloy is avoided, and the surface of the titanium alloy is not needed to be subjected to coating and anticorrosive treatment additionally, so that the cost is saved, and no other additional processing procedures are required.
Owner:南京博乔机械有限公司

Ultra-fine hard alloy coated powder and method for preparing same

InactiveCN101186990AReduced tendency to aggregate and growWell mixedLiquid/solution decomposition chemical coatingCarbonizationTitanium carbide
The invention discloses a super-fine cemented carbide coating powder and process of preparation thereof. Super-fine hard-phase carbonization tungsten in the cemented carbide coating powder and other carbides such as titanium carbide, tantalum carbide, niobium carbide, vanadium carbide and/or chromium carbide are composed around by cobalt-phase ultra-fine powder particles. Karl Fischer's mean particle size of the super-fine cemented carbide coating powder is <=1 mu m. The super-fine tungsten carbide of the invention is put into the liquor of water-soluble metal cobalt-salt after being activated and dispersed with other hard-phase of carbide powder, the super-fine carbide powder and other hard-phase of carbide powder are taken as the core, chemical coprecipitation coating is employed in the reaction, and a uniform cobalt carbonate or cobalt hydroxide inhibitory coating is formed on the surface of the tungsten carbide powder and other hard-phase of carbide powder. The coprecipitation coating powder can be made into the super-fine cemented carbide coating powder by filtering, washing, and drying and low temperature reduction. The invention has the advantages of simple technique and low cost, which can take place the existing cemented carbide wet grinding mixture and the preparation method. High quality super-fine cemented carbide can be prepared by utilizing the powder of the invention.
Owner:CENT SOUTH UNIV +1

Method for quick reduction smelting of titaniferous furnace slag

The invention belongs to the field of titanium smelting, and particularly relates to a method for quick reduction smelting of titaniferous furnace slag. The technical problems that in an existing titaniferous furnace slag reduction method, the smelting warm-up time is long, the time spent in adding reducing agents is long, the reducing agents and smelting slag are mixed unevenly, the smelting period is long, the transformation rate that titanic oxide is transformed into titanium carbide is low, and electric consumption is high are solved. According to the scheme for solving the technical problems, the method for quick reduction smelting of the titaniferous furnace slag comprises the following steps that a, a reducing agent and hot titaniferous furnace slag just discharged out of a furnace are mixed and then added into a reduction furnace together, and pre-reduction is carried out at the temperature of 1,500 DEG C-1,650 DEG C; b, after pre-reduction, temperature is raised to 1,600 DEG C-1,750 DEG C, the reducing agent is replenished, and high-temperature reduction smelting is further carried out; and c, after smelting is finished, heating is stopped, slag is discharged, and titanium carbide furnace slag is obtained. According to the method, in the whole process, heat losses are small, the reduction reaction is fast, time is short, and energy consumption is low.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP

In-situ preparation of wear-resistant self-lubricating coating on surface of titanium alloy by laser cladding

The invention discloses in-situ preparation of a wear-resistant self-lubricating composite material coating on the surface of a titanium alloy by laser cladding. The coating is formed by uniformly distributing a hard ceramic wear-resistant phase of titanium carbide and a metal ceramic self-lubricating phase of titanium aluminum carbide with low friction coefficient on a titanium substrate. Titanium carbide and titanium aluminum carbide in the coating are generated in situ, so that the compatibility of reinforcing particles and the substrate is good, the pollution problem caused by externally adding the reinforcing particles and the interface reaction problem of the reinforcing particles and the substrate are avoided, the interface bonding of a reinforcement and the substrate is good, and the reinforcing particles and the substrate are thermodynamically stable, and moreover, the metal ceramic of titanium aluminum carbide is lower than the conventional solid lubricant particles in friction coefficient and better than the conventional solid lubricant particles in self-lubricating property. The wear-resistant self-lubricating composite material coating is prepared in situ on the surface of the titanium alloy by adopting a laser cladding process, so that the operating process is simple, convenient and feasible, the energy consumption and the production cost can be lowered, and the wear-resistant self-lubricating coating is excellent in performance.
Owner:BEIHANG UNIV
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