3results about How to "Control oxidation" patented technology

The application discloses a composite system for enhancing corrosion resistance of high-entropy alloy and a use method thereof, and relates to the technical field of high-entropy alloy processing. The heat treatment device, the oxidation treatment device and the laser cleaning treatment device are connected with the control panel respectively, so that the temperature, oxidation and laser action of the high-entropy alloy in the processing process can be effectively controlled; the heat field action can accelerate the diffusion of high-entropy alloy elements to obtain more uniform component distribution; the oxidation can quickly generate an oxide protective film on the surface of the high-entropy alloy to isolate corrosion; and the laser cleaning can adjust the surface and interface structure of the high-entropy alloy and help to eliminate surface and internal defects. Through the heat field action, the oxidation and the laser action, the synergistic effect among processes, the corrosion resistance of the high-entropy alloy can be significantly improved, the three-dimensional and comprehensive improvement of the corrosion resistance is realized, and the high-entropy alloy has a wider application space and application value.

The invention discloses a control method for improving the surface wettability of ultrahigh-strength steel, and belongs to the technical field of metallurgy. The method comprises the steps that S1, a closed area is designed in a certain temperature interval of the annealing furnace, S2, O2-containing gas is sprayed to the surface of strip steel in the closed area of the annealing furnace, and the concentration of O2 in the atmosphere in the closed area is controlled; s3, when the strip steel enters the closed area of the annealing furnace with the strong oxidizing atmosphere, the surface of the strip steel is rapidly pre-oxidized, and a layer of Fe oxide with the uniform thickness is formed; s4, after the strip steel penetrates through the pre-oxidation closed area, the strip steel enters an annealing reduction area containing H2 atmosphere, Fe oxide on the surface is gradually reduced into sponge iron, other alloy element oxides are covered below the sponge iron, an internal oxidation phenomenon is generated, the sponge iron on the surface of the strip steel and zinc liquid provide good wettability, and the surface of the strip steel and the zinc liquid are not prone to oxidation; therefore, the surface wettability of the ultrahigh-strength steel in the hot dipping process is improved, and an ultrahigh-strength steel product with good surface quality is produced.

The utility model discloses a feeding device used after polymerization reaction in a polymerization kettle, and relates to the technical field of polymerization reaction, the feeding device comprises a feeding device, the feeding device comprises an operation cylinder, a speed reducing motor, a magnetic vibrator, a feeding pipe, a vacuum pipe, an auger and a connecting flange, the inner hollow section of the operation cylinder is equal to the outer ring section of the auger in size, and the outer ring section of the auger is connected with the speed reducing motor. The bottom end of the gear motor is connected with the axis of the top face of the magnetic vibrator, the feeding pipe and the vacuum pipe are installed on the positions, close to the top end, of the two side faces of the operation cylinder respectively, and the feeding pipe and the vacuum pipe are communicated with the interior of the operation cylinder. The vacuum pipe is connected with a vacuum machine, oxygen fed by the feeding pipe together can be extracted in time, polymer oxidation is effectively controlled, the polymer is prevented from becoming waste, the bottom end of the auger and the bottom opening of the connecting flange are located on the same horizontal line, materials can be completely discharged conveniently, and the feeding efficiency is improved.