5 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 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 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.