77 results about "Boriding" patented technology

The invention relates to the field of furnace lining materials, in particular to a rapid repairing material for a tapping hole and a furnace lining of an intermediate frequency furnace. The rapid repairing material comprises the following components in parts by weight: 50-70 parts of tabular corundum, 10-20 parts of fused magnesite, 8-15 parts of alumina micro powder, 3-8 parts of nano zirconia, 5-12 parts of silicon carbide, 10-15 parts of silica sol and 2-5 parts of a reinforcing agent. Wherein the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride. The tabular corundum is mainly used as an integral framework; the fused magnesite is matched with the alumina micro powder to form magnesium aluminate spinel with a high melting point; the nano zirconium oxide can fill pores and is excellent in toughness; the silicon carbide has the advantages of high hardness, high thermal conductivity and high melting point; the reinforcing agent is titanium calcium aluminate coated with chromium nickel boride, although the adding amount is small, the high-temperature strength, toughness and thermal shock resistance of the repairing material can be remarkably improved, and especially the long-term corrosion resistance can be remarkably improved.

The invention relates to the technical field of metal material surface strengthening and modification, in particular to a preparation method and process of a titanium alloy laser cladding cobalt-based wear-resistant coating. The invention provides a titanium alloy surface laser cladding cobalt-based wear-resistant coating which takes titanium or a titanium alloy as a base material, comprises the following components in percentage by weight: 40-50% of cobalt (Co), 30-40% of tungsten carbide (WC), 10-15% of chromium (Cr), 1-5% of lanthanum hexaboride (LaB6), 2-5% of silicon (Si) and 0.5-3% of calcium fluoride (CaF2), and has the beneficial effects of improving wear resistance, high-temperature stability, corrosion resistance, high hardness, high bonding strength, difficulty in cracking and the like.

The invention belongs to the technical field of tungsten alloy, and particularly discloses a tungsten alloy electrode material and a preparation method thereof.The tungsten alloy electrode material comprises, by weight, 0.1%-0.2% of lanthanum boride, 0.2%-0.5% of zirconium oxide, 0.2%-0.6% of boron carbide, 0.4%-0.8% of cerium oxide, 0.5%-1.2% of tantalum carbide, 1.4%-1.8% of modified carbon nanotubes and the balance tungsten powder. The lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes are added into the tungsten powder, under the combined action of the lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes, the tensile strength and the electrical conductivity are effectively improved, and the high-temperature stability tungsten powder has excellent high-temperature stability and wide application prospects.

This invention relates to a coating alloy, based on Iron Boride (Fe2B), a powder developed for bonding the surfaces of steels. Coatings made with the powder of this invention, using methods such as fusion or thermal spraying, provide an increase in surface hardness, wear resistance, and corrosion resistance of metallic materials, especially steels, and therefore represent a significant alternative to bonding through thermochemical methods. The alloy powder developed in this invention essentially contains iron (Fe) and boron (B) elements, with a boron (B) content between 7.1 % and 10% by weight.

The application discloses a preparation method of zirconium boride-based porous ultrahigh-temperature ceramic, and the method comprises the following steps: obtaining at least two kinds of zirconium boride powder with different particle sizes, mixing the obtained zirconium boride powder, and drying the mixed zirconium boride powder to obtain zirconium boride-based powder; the obtained zirconium boride-based powder is loosely stacked in a sintering container; the sintering container containing the zirconium boride-based powder is sintered in a protective gas atmosphere, and then zirconium boride-based porous ultrahigh-temperature ceramic is obtained. The preparation method provided by the application can quickly prepare zirconium boride-based porous ultrahigh-temperature ceramic, and the prepared zirconium boride-based porous ultrahigh-temperature ceramic has the characteristics of high compressive strength and low thermal conductivity.

The application relates to the technical field of ceramic materials, in particular to a boron carbide composite ceramic material and a preparation method and an etching component thereof. The preparation method comprises the following steps: forming granular materials containing boron carbide, titanium boride and silicon carbide, the granular materials have a spherical structure, the mass proportion of the boron carbide in the granular materials is 70%-90%, the mass proportion of the titanium boride is 5%-25%, and the mass proportion of the silicon carbide is 5%-25%; and the granular materials are sequentially subjected to pre-sintering and hot-press sintering to prepare the boron carbide composite ceramic material; wherein the temperature of the pre-sintering is 1200 DEG C-1500 DEG C. The application can promote the three-dimensional communication growth of sintering necks in the hot-press sintering process, effectively improve the material density, ensure the good uniformity of the material, and synergistically improve the etching resistance of the boron carbide ceramic material.

The application provides a modified lithium manganese iron phosphate positive electrode material and a preparation method and a lithium ion battery thereof, and relates to the technical field of lithium ion battery materials. The positive electrode material is prepared by mixing a phosphorus source, an iron source, a manganese source, a lithium source, a magnesium source and a titanium source, and then performing hydrothermal reaction, centrifugal washing and drying to synthesize lithium manganese iron phosphate. The electronic conductivity of the lithium manganese iron phosphate is improved by coating polypyrrole and a glucose carbon layer. The application introduces magnesium and titanium co-doping to stabilize the crystal structure, shorten the lithium ion diffusion path, inhibit the dissolution of manganese elements and reduce the structural changes in the charging and discharging process. The coating of cobalt boride inhibits the side reaction with the electrolyte and improves the electrochemical performance of the lithium manganese iron phosphate. The primary nanoparticles improve the ion conductivity, and the secondary nanoparticles are nanoparticles assembled by the primary nanoparticles, which have the advantages of good rate performance, high tap density and high vibration density.

The invention belongs to the technical field of preparation of green special fire-resistant ceramics and functional coatings for continuous casting, and provides a special fire-resistant anti-adhesion ceramic coating for a boron nitride side sealing plate for thin-strip continuous casting and a preparation method of the special fire-resistant anti-adhesion ceramic coating. The preparation method comprises the following steps: forming a hollow structure by taking polymer microspheres as a template, dipping in a cerium salt solution and sintering; preparing coated zirconium boride, mixing zirconium boride with silicon dioxide powder, depositing an aluminum phosphate protective film on the surface of the mixture, and performing heat treatment and curing; compounding the boron nitride sheets and the silicon carbide nanowires, and performing surface treatment to obtain a mixed reinforcing material; the materials are prepared into three-layer slurry with a gradient function, then the boron nitride side sealing plate base body is coated with the bonding layer, the functional layer and the working layer in sequence, low-temperature pre-sintering is conducted on the multi-layer structure, and finally rapid densification of the coating is achieved through the spark plasma sintering technology. And constructing a special fire-resistant anti-adhesion functional layer taking an inorganic ceramic phase as a main body.

This invention relates to the field of welding electrodes for duplex stainless steel, specifically to a welding electrode for duplex stainless steel and its preparation method. When residual stress at the weld seam of 2209 duplex stainless steel is eliminated through high-temperature heat treatment, the mechanical properties and corrosion resistance of the weld seam significantly decrease. To address the above technical problem, this invention provides a welding electrode for duplex stainless steel that effectively slows down the phase transformation rate during high-temperature heat treatment, avoids excessive austenite formation, and maintains the balance of the duplex structure. The electrode coating composition specifically includes lanthanum hexaboride and Ti-6Al-4V alloy, which have grain-refining effects and simultaneously inhibit the precipitation of harmful intermetallic phases. This effectively suppresses the precipitation of harmful phases such as the σ phase during weld heat treatment, ensures the solid solubility of chromium and molybdenum, and allows the weld seam to retain excellent comprehensive properties after high-temperature treatment.

The application belongs to the field of ceramic materials, and particularly relates to a preparation method of a porous titanium boride alloy / hydroxyapatite fluoride composite material. 10 (PO4)6OH 2‑2x F 2x Wherein, x is 0.1-0.6; in the mixture, the weight ratio of TC4, TiB2 and FHA is 86-94:3-7:3-7; the sintering temperature is 1000-1100 DEG C. The application also includes the composite material prepared by the preparation method and the application of the composite material in oral implant materials. The preparation method can realize synergy, improve the strength and biological activity of the material based on the combination of components, proportions and sintering processes.

A hardened slip and a method of making the hardened slip are disclosed. A method of hard surfacing a slip component for a downhole tool is disclosed. The slip component may have a bearing surface and may be composed of a base material, the base material being metallic. The method may comprise steps of positioning at least the bearing surface of the slip component with a direct contact with a boron source; bonding an external layer at least on the bearing surface to form a metallurgical bond between boron from the boron source with the base material by boriding the base material; and maintaining a bulk temperature of the slip component below a melting point of the base material.

The invention belongs to the technical field of dust removal equipment, and particularly relates to a negative pressure dust collection device for a straight wire drawing belt sander, the negative pressure dust collection device comprises a dust collection box and a sealing box door, the inner wall of the dust collection box is fixedly connected with a partition plate, and the upper surface of the partition plate is fixedly connected with a suction fan. The negative-pressure dust collecting device can comprehensively absorb metal dust generated by abrasive belt grinding of a steel wire to be boronized under negative pressure, the situation that the metal dust overflows to pollute the environment and harm the health of workers is avoided, the environment friendliness of the wire drawing process is improved, and the device has the online dust removing function through the pulse cleaning mechanism; two dust collecting cloth bags alternately run, so that the use continuity is improved, meanwhile, the device further has the function of aggregating metal powder into blocks, the situation that secondary pollution is generated due to the fact that the metal powder drifts away again in the discharging process of the metal powder in the device is avoided, and the use reliability and efficiency of the device are improved; and the dust-collecting and environment-friendly effects of the device are improved.

The present application relates to the technical field of glaze, and particularly relates to a composite zircon white opal frit, a preparation method thereof, super-white glaze using the composite zircon white opal frit and ceramic tile. The raw materials of the composite zircon white opal frit include, in terms of weight parts, quartz 25-40 parts, calcined alumina 5-10 parts, potassium feldspar 20-35 parts, talc 3-10 parts, calcite 5-10 parts, calcium phosphate 5-10 parts, calcined shell 1-5 parts, zirconium boride 7-15 parts, zirconite sand 3-10 parts, kaolin 1-5 parts and zinc oxide 3-10 parts. The raw materials of the composite zircon white opal frit described above can make the composite zircon white opal frit have a high whitening effect; meanwhile, two cooling and holding processes are adopted in the cooling and holding stage, the content of SiO2, P2O5 and MgO in the chemical composition of the composite zircon white opal frit is adjusted, a large amount of fine needle-like MgSiO3 can be generated, and the opalescence and whiteness of the glaze are improved after the obtained composite opal frit is used in the glaze.

The invention discloses a casting method of a high-strength and high-conductivity aluminum alloy. The casting method comprises the following steps: preparing an aluminum alloy melt; performing refining; a refiner Al-5Ti-1B intermediate alloy is added on line; carrying out on-line ultrasonic treatment on the aluminum alloy melt flowing through the launder entering the filtering device; performing two-stage filtration; and semi-continuous casting is carried out, and online ultrasonic treatment is carried out on the aluminum alloy melt flowing through in a launder of the pouring system. The method has the advantages that the boronizing treatment procedure is omitted, the content of impurities such as Ti, V, Cr and Mn in the cast ingot is remarkably reduced, the cracking phenomenon is remarkably improved, and the grain structure is refined.

The application discloses a melt composite treatment method with the advantages of improving the mechanical properties and heat conduction performance of cast aluminum alloy, which comprises the following steps: carrying out boronization treatment on Al-Si series cast aluminum alloy melt to remove transition elements such as V, Ti and Cr, reduce the solid solubility of the above-mentioned elements in the aluminum matrix, reduce the degree of lattice distortion, and improve the heat conductivity of the alloy; further carrying out heat preservation and liquid transfer treatment on the melt to guarantee the removal effect of the above-mentioned elements; and adding Al-Sr-RE composite modifier with a specific content to modify the eutectic silicon in the alloy. Through the cooperation of the above-mentioned treatment methods, the obtained aluminum alloy has excellent mechanical properties and heat conduction performance, can greatly meet the performance requirements of the market and existing products, and has the significance of wide popularization and application.

The application discloses a kind of biomimetic laminated ballistic ceramic material, including matrix layer and embedded layer composition, it is matrix layer, embedded layer, matrix layer in turn by outside inside alternately stacked composition, wherein matrix layer is by B4C powder, SiC powder, nano additive, binder and plasticizer are made, embedded layer is Al2O3 powder, MgO or titanium boride at least one, hexagonal boron nitride powder, binder and plasticizer are made.The biomimetic laminated ballistic ceramic of the application has the advantages of light weight, high hardness, high toughness, good effect of anti-intensive attack, etc.Cutting after the ceramic sample is handled, and the target sample piece with the face density of about 27.5kg / m 2 The target sample piece is prepared by compounding with ultra-high molecular weight polyethylene fiber plate, 95 type 5.8mm ordinary bullet is carried out, and multiple bullet shooting can be effectively defended, and the highest can be continuously defended 8 bullet shooting, and the application is suitable for the protection demand of various light armored equipment and individual protection equipment to small caliber bullet, and the survival rate in battlefield is improved.

The invention discloses a wear-resistant and corrosion-resistant metal mold and a preparation process thereof, and relates to the technical field of metal molds. The method specifically comprises the following steps that a die steel base body is taken and ground to be flat through a grinding machine, then cleaned and dried through acetone, nitrided and preheated, a transition layer and a functional surface layer are sequentially prepared on the surface of the die steel base body through laser cladding, and finally the abrasion-resistant and corrosion-resistant metal die is obtained through boriding. The transition layer comprises the following raw materials in parts by mass: 40-60 parts of nickel-based alloy, 20-30 parts of cobalt-based alloy, 10-12 parts of carbide and 5-8 parts of oxide; the functional surface layer comprises the following raw materials in parts by mass: 80-100 parts of cobalt-based alloy, 0.3-1 part of modified carbon nanotubes, 4-8 parts of carbides and 0.8-1 part of oxides.

The invention relates to a method including box boriding process to improve some mechanical properties such as hardness, corrosion resistance and wear and to provide 100% antibacterial properties to AISI 316L quality stainless steels, which are among the most widely used and known metals in terms of biocompatibility as implant materials. The invention relates to AISI 316L type biomaterial having 100% antibacterial properties according to antibacterial tests with Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 29213 bacteria.

The invention relates to the technical field of ceramic powder, and particularly discloses high-temperature-resistant ceramic powder for plasma spraying and a preparation method and application of the high-temperature-resistant ceramic powder. The high-temperature-resistant ceramic powder for plasma spraying comprises main materials and auxiliary materials according to the weight ratio of 100: (18-32), the main materials comprise zirconium diboride and silicon carbide, the auxiliary materials comprise molybdenum disilicide and hafnium boride, and the particle size of the zirconium diboride, the silicon carbide, the molybdenum disilicide and the hafnium boride is 1t; 100 [mu] m; the preparation method comprises the following steps: blending the main material and the auxiliary material, ball-milling, carrying out spray granulation, carrying out heat treatment, and sieving. The high-temperature-resistant ceramic powder for plasma spraying can be used for protecting a Cf / SiC composite material, so that the Cf / SiC composite material has excellent oxidation resistance and ablation resistance, relatively high ablation resistance time and relatively low average ablation rate, and can smoothly pass ultra-high-temperature laser burn-through detection at the temperature of 1,800 DEG C or above.

The invention belongs to the technical field of ceramic lining plate preparation, and particularly relates to a wear-resistant ceramic lining plate and a preparation method thereof. The wear-resistant ceramic lining plate is prepared from the following raw materials: aluminum oxide, a sintering aid, aluminum titanate, modified urea resin microspheres, hafnium boride, tungsten disilicide and a KH-550 silane coupling agent, and the sintering aid is a mixture of niobium pentoxide, strontium oxide, lanthanum oxide and magnesium oxide. According to the wear-resistant ceramic lining plate, aluminum oxide serves as a main raw material, a mixture of niobium pentoxide, strontium oxide, lanthanum oxide and magnesium oxide serves as a sintering aid, a compound of modified urea-formaldehyde resin microspheres, hafnium boride and tungsten disilicide serves as a reinforcing and toughening phase, aluminum titanate serves as a conditioning agent, and the raw materials have a synergistic effect; and it is ensured that the prepared ceramic lining plate has good wear resistance, hardness and toughness.

Methods and assemblies for diffusion-based boriding as provided. The methods include accounting for faster immersion of a sample by applying an additional power to heat the electrolyte prior to immersion and applying a negative bias voltage to the sample to mitigation or eliminate oxidation. A fixture including a sample holder to apply the negative bias voltage is also provided.

The invention aims to solve the problem that the copper SLM printing machinability is poor, so that the performance of the copper SLM is seriously influenced. The preparation method comprises the following steps that S1, material preparation is conducted, specifically, high-purity copper powder and high-purity lanthanum hexaboride powder are mixed, and evenly-mixed powder is obtained; s2, the mixed powder is subjected to additive manufacturing forming through the selective laser melting technology; and S3, linear cutting is conducted, specifically, linear cutting is conducted on the printed lanthanum hexaboride / copper composite material workpiece in a linear cutting mode, and the lanthanum hexaboride / copper composite material is obtained. The preparation complexity and cost of the lanthanum hexaboride / copper composite material are greatly reduced, the prepared lanthanum hexaboride / copper composite material is good in compounding effect, high in strength and toughness and high in conductivity, and new possibility is developed for wide industrial application.

This invention discloses a zirconium boride dispersion-reinforced fine-grained tungsten sintered billet. The billet consists of a tungsten matrix and zirconium boride particles dispersed within the tungsten matrix, exhibiting a dual distribution state of intragranular and grain boundary dispersion. The average grain size of the tungsten matrix is ​​no greater than 40 μm, the average grain size of the zirconium boride particles is no greater than 2 μm, and the relative density of the sintered billet is no less than 94%. A semi-coherent metallurgical bonding transition layer with a thickness of no less than 1.5 nm is formed between the zirconium boride particles and the tungsten matrix. This invention also provides a method for preparing this sintered billet, which involves long-time wet ball milling, short-time dry ball milling, combined with cold isostatic pressing and pressureless sintering. The doped tungsten prepared by this invention achieves uniform dispersion of zirconium boride particles and grain refinement of the tungsten matrix. The process is controllable, the interfacial bonding is excellent, and the prepared sintered billet has a fine microstructure and uniform dispersion of the dispersed phase, overcoming the defects of uneven dispersion of the traditional tungsten reinforcing phase, coarsening of grains, and weak interfacial bonding.

The invention discloses a glass lubricant for improving high-temperature lubricating performance through boride ceramic as well as a preparation method and application of the glass lubricant, and relates to the technical field of high-temperature lubrication. The glass lubricant comprises the following components in percentage by mass: 90-99% of glass powder and 1-10% of boride ceramic powder, wherein the total mass percentage of the glass powder and the boride ceramic powder is 100%. And the boride ceramic powder is one or more of TiB2, TiB and Ti2B5. The titanium boride and the glass lubricant are used as raw materials, and the titanium boride is introduced into the glass lubricant, so that the glass lubricant has a lubrication promoting effect and structural stability in a glass lubricant system, and the lubrication requirement under a high-temperature condition is met while the oxidation resistance at medium and low temperatures is maintained.

The invention discloses a boron-titanium-aluminum composite shielding material for nuclear radiation protection and a preparation method of the boron-titanium-aluminum composite shielding material, and belongs to the technical field of shielding materials. Comprising the following raw materials in parts by weight: 80-90 parts of aluminum alloy, 5-15 parts of tungsten boride particles, 5-8 parts of Gd2O3, 5 parts of TiH2 and 1-2 parts of stearic acid. The three shielding components in the aluminum-based shielding material achieve a synergistic effect, and light-weight efficient radiation protection is achieved; tungsten boride and Gd2O3 in the boron-titanium-aluminum composite shielding material provided by the invention realize double efficient shielding of gamma rays and neutrons; in addition, 157Gd and B in WB / TiB2 have a synergistic effect, so that an efficient thermal neutron absorption system is formed. Therefore, the boron-titanium-aluminum composite shielding material prepared by the invention has the advantages of light weight and efficient radiation resistance, and has important application value in the technical field of shielding materials.

The invention discloses an oxide-doped LaB6 polycrystalline material and a preparation method and application thereof.The preparation method comprises the steps that lanthanum hexaboride and metal oxide are mixed, ball-milled to be uniform and dried to obtain first powder, the metal oxide is an oxide of M, and M is Al, Zr and Ti; the first powder is placed in a mold, the first powder is located in the center of the mold and has the same apparent density, in the inert gas atmosphere, the pressure is increased from the pressure P1 to the pressure P2, heat preservation is carried out for 0.5-3 h at the pressure P2 and the temperature of 1400-2000 DEG C, hot pressing sintering is carried out, cooling is carried out, meanwhile, pressure preservation is carried out for 0-3 h at the pressure P2, the LaB6 polycrystalline material doped with the oxide is obtained, the P1 ranges from 5 MPa to 9 MPa, and the P2 ranges from 20 MPa to 60 MPa. By adding the oxide phase, the sintering temperature of the pure LaB6 ceramic is reduced from 1975 DEG C to 1800 DEG C or below, the conductivity of the LaB6 ceramic is not deteriorated after doping, and the bending strength is effectively improved.

The invention relates to the technical field of high corrosion resistance and wear resistance, and discloses a large-size anti-fatigue titanium alloy impeller forge piece and a machining technology of the large-size anti-fatigue titanium alloy impeller forge piece. Comprising the following steps: uniformly smelting alloy raw materials, and carrying out casting molding; cogging and forging; performing heat treatment to obtain a basic forge piece; after the basic forge piece is cleaned, laser cladding, boriding and magnetron sputtering are sequentially carried out, a corrosion-resistant and wear-resistant layer is formed, and the titanium alloy impeller forge piece is obtained; during laser cladding, mixed alloy powder is used, laser cladding is conducted on the surface of the basic forge piece in a coaxial powder feeding mode, a cladding layer is formed, and a laser cladding alloy material is obtained; and the mixed alloy powder is a composition of Ti, Cr, Ni, SiC, TiB2 and B. Through three-step surface treatment of laser cladding, boriding and magnetron sputtering, a high-wear-resistance and corrosion-resistance layer is formed on the surface of the basic forging, and the impact resistance and the fatigue resistance of the large-size anti-fatigue titanium alloy impeller forging are ensured on the basis of effectively improving the wear resistance and the corrosion resistance.

The application discloses a shielding piece made of a tungsten-based alloy material, a preparation method and application, the tungsten-based alloy comprises a tungsten base and lanthanum hexaboride dispersed in the tungsten base, and the content of boron in the tungsten-based alloy is 0.01wt%-0.5wt%. The tungsten-based alloy in the application introduces lanthanum hexaboride, which is beneficial to the refinement of tungsten grains in the tungsten-based alloy, enhances the toughness of the tungsten-based alloy, reduces the ductile-brittle transition temperature, and improves the absorption capacity of the tungsten-based alloy to neutron irradiation; meanwhile, the introduction of the lanthanum hexaboride does not reduce the heat conduction performance of the tungsten base, but helps to improve the heat conduction performance of the material, which is all beneficial to the improvement of the service life of the shielding piece.

This invention belongs to the field of aluminum alloy conductive material preparation technology, and discloses an 8030 aluminum alloy wire and its preparation process. The composition and mass percentage of the 8030 aluminum alloy are: Fe 0.6-0.75%, Cu 0.2-0.25%, Ce 0.05-0.3%, B 0.001-0.04%, Zn 0.01-0.05%, Mg 0.003-0.005%, Si≤0.1%, impurity element content≤0.05%, and the balance is aluminum. This invention achieves a synergistic increase in conductivity, tensile strength, and elongation of the 8030 aluminum alloy through multi-scale control of alloy composition, boronizing process, and rare earth addition process.