7results about How to "Reduce volume fraction" patented technology

The invention relates to a nanofiber felt with nonlinear volt-ampere characteristics, an epoxy resin composite material and a preparation method, and belongs to the technical field of electrical and electronic insulating materials. The nanofiber felt with the nonlinear volt-ampere characteristic is of a three-dimensional porous network structure formed by non-directional stacking of nanofibers, and the nanofibers are formed by assembling silicon carbide, tungsten trioxide and gallium sesquioxide. According to the scheme provided by the invention, the nanofiber with a relatively high Schottky barrier is synthesized by utilizing a method of doping metal oxide semiconductors with different Fermi levels, and the problem that the non-linear volt-ampere characteristic of a composite material without a seepage threshold value is not ideal is solved.

This application relates to a lead-bismuth removal cleaning solution, its preparation method, its application method, and its cleaning system. The lead-bismuth removal cleaning solution provided in this application has low volume fractions of hydrogen peroxide and acetic acid, making it mild and safe. Furthermore, by rationally proportioning the volume fractions of hydrogen peroxide and acetic acid, the solution can accelerate the dissolution of lead and bismuth. Moreover, the weakly acidic nature of the solution can prevent excessive corrosion of the materials being cleaned, thus ensuring their roughness and achieving a good lead-bismuth removal effect.

The application discloses a kind of stable column oil-gas separation control method, device, equipment and medium, belong to oil refining chemical industry field, control method includes: obtaining the product information of stable column;According to product information, it is judged whether product quality is qualified;If product quality is unqualified, then light gasoline is discharged from the intermediate material outlet of stable column;After light gasoline is discharged, control stable column carries out oil-gas separation processing, and obtains qualified liquefied gas and stable gasoline.The application increases the intermediate material outlet in the stable column, and the product is qualified without being used.If it cannot realize the qualification of liquefied gas and stable gasoline by appropriately increasing reflux ratio, the intermediate material outlet is used, and the light gasoline material is self-pressured to the main fractionating column top liquid separator or the fresh raw material buffer tank of catalytic cracking device, which reduces the difficulty of realizing the qualification of liquefied gas and stable gasoline, avoids the substantial benefit loss caused by the shutdown of catalytic cracking device, and ensures the long-period operation of stable column.

A process for carbonitriding high-carbon chromium bearing steel to achieve high hardness and low residual austenite content is disclosed, comprising the following steps: S1, pre-cleaning to ensure the surface of the high-carbon chromium bearing steel is clean and free of oil; S2, pre-oxidation to ensure the surface of the high-carbon chromium bearing steel is free of water stains; S3, carbonitriding to improve the surface hardness and wear resistance of the high-carbon chromium bearing steel; S4, post-cleaning to ensure the surface of the high-carbon chromium bearing steel is clean and free of oil; S5, cold treatment to retain low residual austenite inside the high-carbon chromium bearing steel; S6, tempering to achieve high hardness of the high-carbon chromium bearing steel. The beneficial effects of this invention are: this process organically combines pre-oxidation, carbonitriding, cold treatment, and tempering to form a high-hardness, high-wear-resistant carbonitrided layer on the surface of the bearing steel, and the cold treatment effectively controls the residual austenite content, suppressing dimensional changes due to aging.

The invention relates to a corrosion-resistant magnetically soft alloy, in particular to a high-chromium high-plasticity corrosion-resistant magnetically soft alloy and a preparation method of a bar of the high-chromium high-plasticity corrosion-resistant magnetically soft alloy. Comprising the following steps: proportioning: weighing 2.2-2.8% by weight of silicon and 0.3-0.6% by weight of manganese as alloying raw materials; the method comprises the following steps: weighing 0.005 to 0.008 percent of carbon and 0.8 to 1.2 percent of aluminum as a deoxidizing and desulfurizing agent; 19.0-21.0% of chromium and the balance iron are weighed to serve as smelting raw materials; and vacuum melting, molten steel deoxidation, desulfurization and alloying, primary forging, secondary forging and heat treatment are conducted, and the high-chromium high-plasticity corrosion-resistant magnetically soft alloy bar is manufactured after heat treatment is completed. By increasing the content of chromium in the corrosion-resistant magnetically soft alloy and introducing the aluminum element, the corrosion resistance, plasticity, resistivity and magnetic performance of the corrosion-resistant magnetically soft alloy are improved.

The invention provides a Ti-W-series super-elastic metastable beta titanium alloy and a preparation method and application of the Ti-W-series super-elastic metastable beta titanium alloy. According to the Ti-W series super-elastic metastable beta titanium alloy, beta type titanium serves as a matrix, three elements of tungsten, zirconium and tin are added, and in the alloy components, by taking the total mass of raw material composition components of the material as 100%, the alloy components comprise, by mass, 20% of W, 4%-6% of Zr, 6%-8% of Sn and the balance Ti. The Ti-W metastable beta titanium alloy provided by the invention has the room-temperature super-elastic characteristic, also has the characteristics of high strength, good plasticity and the like, has the characteristics of low elastic modulus, excellent biocompatibility and the like, and has great application value in the field of biomedical treatment.

The present invention discloses a composite wire, which comprises a copper core, a stainless steel layer and a silver layer from the inside to the outside. The present invention also discloses a method for preparing the composite wire. In the composite wire of the present invention, part of Ag is replaced by Cu, which reduces the volume fraction of Ag and the preparation cost; stainless steel (SS) is selected as the intermediate material, which is not miscible with Cu and Ag, and is cheaper than Ag and Cu, and has higher strength; at the same time, stainless steel has good high-temperature oxidation resistance, and can also avoid the reaction of Cu and Ag at high temperature, preventing the reduction of electrical conductivity. When preparing the composite wire of the present invention, the stainless steel and the Cu rod are first drawn tightly to obtain a good Cu / SS interface bonding, and then the wire is inserted into an Ag tube for a second drawing to obtain a good SS / Ag interface bonding; the operation is simple, the cost is low, and the volume fraction of the components can be changed to obtain composite wires with different conductivity and strength combinations.