In the production of steel, the use of vacuum is essential to reduce a certain amount of disturbing elements from the melt, and steel metal degassing to produce a purer grade. Molten steel vacuum degassing is to place the molten steel in a vacuum condition for degassing to avoid atmospheric contamination of the molten steel, mainly refers to the prevention of hydrogen, nitrogen, oxygen and other gases on the steel, while stirring and heating are used in the degassing process to homogenize the molten steel structure, improve the refining effect and ensure the pouring temperature. Dehydrogenation can prevent the formation of white spots due to excessive hydrogen content in the steel; deoxidation, in a vacuum environment, low partial pressure of carbon monoxide above the steel, oxygen is easy to react with the carbon in the steel to generate carbon monoxide, reduce the oxygen content at the same time, reduce the carbon content, improve the quality of steel. At the same time, the process of deoxidation is also the process of desulfurization, by adding additives with affinity to sulfur, the desulfurization is completed in the process of vacuum degassing. Vacculex multi-stage roots pumps and screw vacuum pumps can meet the technical requirements of this process.
For processes in vacuum furnaces, it is particularly important to reach a specific pressure within a given time. The time savings achieved by shortening the evacuation time contribute to the economic efficiency. In addition, excess substances such as oxygen can be removed from the drying chamber during the evacuation process. Vacuum sintering is the process of forming a single mass from multiple components, typically powder, by heat and/or pressure, without melting the base material to the point of liquefaction, and to achieve a debonding process, with evaporation of the binder and a working pressure of 0.1 to 0.01 mbar. Vacuum quenching, uniform heating, penetration heating and quenching are the necessary elements to prevent workpiece deformation in vacuum quenching, which requires thermal convection of high purity nitrogen, and then vacuum pumps to rapidly evacuate the nitrogen introduced into the process with a working pressure of 1 mbar. In vacuum furnace applications, Vacculex roots vacuum pumps(mechanical vacuum booster) are used in a variety of fields such as sapphire processing, quartz glass processing, gearbox gear heat treatment, etc.
Vacuum coating is a method of heating metal or non-metal materials under high vacuum conditions to evaporate and condense on the surface of the plated part (metal, semiconductor or insulator) to form a thin film. Thin films are widely used in electronics, machinery, printing, alloys, cutting tools and other industries, and have an extremely important role to play. Vacuum coating technology can be divided into Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD). The films prepared by CVD are dense, with strong film-substrate bonding and high film deposition rate, which are ideal for industrial applications. Physical vapor deposition is a method of depositing the plating material directly onto the substrate surface by vaporizing it into atoms, molecules or dissociating it into ions under vacuum conditions using various physical methods.
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