5 results about "Nitriding" patented technology

The invention discloses a method for preparing a feeding nozzle for a continuous high-purity alumina melting furnace. The continuous high-purity alumina melting furnace consists of a cooling water jacket furnace shell 1, a carbon fiber heat insulation material 2, a ceramic inner container seat 3, graphite heating elements 4, a ceramic inner container 5, the feeding nozzle 6, a furnace body upper cover 7, an upper cooling cavity 8, a hearth 9, a lower cooling cavity 10 and a furnace body lower cover 11, wherein a cooling water jacket is adopted in the cooling water jacket furnace shell; and the feeding nozzle for the continuous high-purity alumina melting furnace is made of a composite material prepared from reactive sintered aluminum nitride and hafnium boride and used at the temperature of between 1,600 and 2,200 DEG C in the atmosphere of nitrogen. The feeding nozzle for the continuous high-purity alumina melting furnace have the advantages of uniform microstructure, high strength, high overall reliability, high oxidation resistance, high-purity alumina pollution prevention, capability of being used for long time at the temperature of 2,200 DEG C, continuous production, high production efficiency and the like.

The invention discloses a manufacturing process suitable for a pure iron or composite iron non-stick pan, and relates to the field of a non-stick pan technology. The manufacturing process specificallycomprises the following steps of blanking, electric corrosion, stretching, pan mouth pressing, edge punching, punching, sanding, nitridation, blackening, spraying, sintering, polishing, cleaning andthe like. According to the manufacturing process suitable for the pure iron or composite iron non-stick pan, the surface of a pan body is not prone to corroding, the hardness is high, scratches from acutter and shoveling scratches from a steel shovel can be resisted, the surface of the pan body is provided with uneven mesh patterns through etching, the surface has good non-stick performance, andprotrusion of an etched mesh pattern lace line protects a non-stick coating in a concave plane.

The invention belongs to the technical field of biomedical metal products, and particularly relates to a preparation method of a root canal file nano TiN coating film. The preparation method of the root canal file nano TiN coating film comprises the following steps that the environment is treated to a certain vacuum degree, and Ti atoms are adsorbed to the surface of a material; introducing nitrogen to increase the environment to normal atmospheric pressure; and nitriding the activated Ti to obtain the compact nano TiN coating. The film coating method adopted by the invention is simple in process, but the film coating effect is excellent, TiN is tightly combined with the matrix, the mechanical property of the matrix is kept, the surface is smooth and clean, and cracks and falling are avoided in superelastic deformation. And the method is completely suitable for 8-10% of recoverable deformation of a matrix nickel-titanium alloy with large deformation, and has no biotoxicity.