8 results about "Nickel carbide" patented technology

The invention discloses an oil well pump which comprises an oil outlet valve, a head thread, an internal thread plunger, an oil inlet valve, a traveling valve, an oil inlet plug, an upper coupling, a wear-resistant ring, a pump cylinder, a middle coupling, a lower coupling, a connecting pipe, a pressure reducing valve assembly, a fixed valve connector and a gas and sand anchor. The upper end of the double-end thread is in threaded connection with the oil outlet valve; the lower end is connected with a plunger; the lower end of the plunger is in threaded connection with the oil inlet valve, the traveling valve is placed in the oil inlet valve, the oil inlet plug is in threaded connection with the oil inlet valve and abuts against a valve seat of the traveling valve, the upper portion of the upper coupling is in threaded connection with the oil pipe through the oil pipe, the lower portion of the upper coupling is in threaded connection with the pump cylinder, and the top of the pump cylinder abuts against a wear-resisting ring arranged between an inner ring of the upper coupling and an outer ring of the oil outlet valve. The lower end of the connecting pipe is connected with a pressure reducing valve through a lower coupling, the pressure reducing valve is connected with a fixing valve connector through threads, and the fixing valve connector is connected with the upper portion of a gas and sand anchor; a nickel carbide coating is arranged on the surface of an inner hole of the pump cylinder, a tungsten carbide coating is arranged on the outer surface of the internal thread plunger, and the nickel carbide coating and the tungsten carbide coating form a corrosion-resistant friction pair with the potential difference smaller than or equal to 0.3 V.

The invention relates to the technical field of biological carbon materials, in particular to a chicken cartilage nickel-doped modified carbon material and a preparation method and application thereof. A biomass material chicken cartilage is adopted as a raw material and is crushed into powder, and the powder is subjected to first carbonization, activation, second carbonization and nickel doping to obtain the chicken cartilage nickel-doped modified carbon material. Through selection of the raw materials and optimization of the preparation process, optimization of the structure and components of the carbon material is realized, and the carbon material can be applied to the field of electrochemistry and has relatively high capacitance, the preparation process is simple, the raw materials are green and environment-friendly, and the cost is low.

The application discloses a kind of high-speed flux for pipeline girth weld fine wire submerged arc welding and preparation method, including by mass percentage: fluorite 23-26%, calcined coke stone 20-23%, pre-melting calcium aluminate 18-21%, talc powder 12-14%, potassium fluosilicate 5-7%, zirconium-rich iron ore 5-7%, heavy rare earth silicon iron 2.5-4%, carbonized nickel-iron alloy 2-4%.The application meets the demand of multi-fine wire submerged arc welding X90Q pipeline girth weld, has good welding process and post-welding butt joint metal mechanical properties, is widely used in pipeline production industry, greatly improves the production efficiency and life quality of people.

The invention provides a green catalytic synthesis method of butanedioic anhydride, which comprises the following steps: catalyzing maleic anhydride to prepare butanedioic anhydride by taking a supported nickel carbide coated nickel nano composite material as a catalyst and hydrogen as a hydrogen source, the supported nickel carbide coated nickel nano composite material is composed of an activated carbon carrier, an active metal nickel core and a nickel carbide shell coated on the surface of the active metal nickel core. Compared with the prior art, the specific nickel-based catalyst is adopted, the catalyst realizes high reaction activity of maleic anhydride hydrogenation and high selectivity of a single product succinic anhydride under mild reaction conditions, a nickel carbide shell can protect internal nickel nanoparticles from being poisoned, repeated application can be realized, the cost of the catalyst is reduced, and the catalyst is suitable for industrial production. Meanwhile, after reaction, the catalyst is easily separated from hydrogenation mother liquor, can be used for multiple times without inactivation, and has better stability.

The invention discloses a nickel carbide dispersion strengthening enhanced copper-nickel-tin alloy and a preparation method, and relates to the field of alloy materials. The alloy is obtained by carrying out alloy smelting on a nickel-based composite blank containing Ni3C and other raw materials, and the nickel-based composite blank containing Ni3C is prepared by carrying out high-energy ball milling on pure nickel powder and graphene and then sintering. According to the preparation method disclosed by the invention, Ni3C can be generated in situ in a nickel base through graphene by utilizing a sintering process, natural nanoscale carbides are formed when nickel and graphene are carbonized and are uniformly dispersed in the nickel base, so that the problem that the size is increased or the dispersion is nonuniform when a dispersion strengthening phase is independently added can be avoided; the structure size and morphology of the alloy can be regulated and controlled through the evenly-dispersed dispersion reinforcing phase Ni3C, so that the mechanical property of the material at the high temperature is improved, meanwhile, the number of grain boundaries is increased, the grain boundary strength is improved, and the strength and hardness of the alloy are improved.

The present invention provides a green catalytic synthesis method for succinic anhydride, comprising the following steps: using a supported nickel carbide-coated nickel nanocomposite as a catalyst and hydrogen as a hydrogen source to catalyze the production of succinic anhydride from maleic anhydride; the supported nickel carbide-coated nickel nanocomposite comprises an activated carbon support, an active metal nickel core, and a nickel carbide shell coated on the surface of the active metal nickel core. Compared to the prior art, the present invention utilizes a specific nickel-based catalyst that achieves high reactivity for maleic anhydride hydrogenation and high selectivity for the single product, succinic anhydride, under relatively mild reaction conditions. The nickel carbide shell protects the nickel nanoparticles within from poisoning, allowing for multiple reuse and reducing catalyst costs. Furthermore, the catalyst is easily separated from the hydrogenation mother liquor after the reaction, allowing for multiple uses without deactivation and exhibiting good stability.

The application discloses a kind of double built-in electric field ternary heterojunction photocatalyst and preparation method thereof.The catalyst is composed of bismuth vanadate, manganese sesquioxide and nickel carbide;The mass ratio of bismuth vanadate, manganese sesquioxide and nickel carbide is 10-5:2-1:1;Bismuth vanadate, manganese sesquioxide and nickel carbide in the photocatalyst form Z-type heterojunction structure.The catalyst is prepared by hydrothermal method and electrostatic self-assembly method, by strictly controlling the proportion of each component and reaction parameter, realize the Z-type heterojunction structure of bismuth vanadate, manganese sesquioxide and nickel carbide, greatly improve the visible light absorption and the performance of carrier recombination inhibition of catalyst.The catalyst based on the synergistic effect of double built-in electric field, Z-type inhibition junction structure and catalyst magnetism, so that the catalyst has excellent photocatalytic activity, by testing, using the catalyst to degrade BP-3, 30min within degradation rate is 60%, 60min degradation rate is 90%.

The invention discloses a silver tungsten carbide nickel contact and a preparation method thereof.The preparation method comprises the following steps that S1, mixed powder composed of silver powder and nickel powder is put into a vapor deposition reaction chamber, a tungsten carbide precursor and argon are introduced into the vapor deposition reaction chamber for a reaction, and nano tungsten carbide coated mixed powder is obtained; s2, the nano tungsten carbide coated mixed powder and tungsten carbide powder are mixed and granulated, granules obtained after granulation are added into a forming press to be pressed and formed, and a pressed blank is obtained; and S3, the pressed blank is fed into a sintering furnace to be sintered, and then a sintered product is fed into an infiltration furnace to be subjected to infiltration operation. The silver powder and the nickel powder are coated with the nano tungsten carbide, the ultrahigh specific surface area of the nano tungsten carbide becomes a'high-speed channel 'of atomic diffusion, silver atoms and nickel atoms are rapidly migrated to a micron tungsten carbide contact point through surface diffusion, the interface bonding strength is remarkably improved, and the structure uniformity and the interface bonding strength of the contact are improved.