6results about How to "Improve hardness performance" patented technology

The invention belongs to the technical field of coatings, and discloses an anti-yellowing and high-hardness UV (ultraviolet) laminating varnish as well as a preparation method and application thereof. The UV film coating varnish comprises six-functionality alicyclic polyurethane acrylic resin, two-functionality linear polyurethane acrylic resin, pure acrylic resin, an acrylate reactive diluent, a filler, an ultraviolet light absorber, a non-alkaline hindered amine free radical scavenger and a photoinitiator. The weight ratio of the six-functionality alicyclic polyurethane acrylic resin to the two-functionality linear polyurethane acrylic resin to the pure acrylic resin to the acrylate reactive diluent is (2.5-3.5): (1-1.5): 0.5: (2.0-3.0); the bifunctional linear polyurethane acrylic resin is prepared from the following raw materials: isocyanate, poly (1, 4-butanediol) and hydroxyethyl acrylate. A paint film formed by the UV film-coated varnish has good yellowing resistance and high hardness, and is not easy to crack after thermal cycling.

The invention provides a centrifugal bimetal composite graphite steel roll collar and a manufacturing method thereof.The centrifugal bimetal composite graphite steel roll collar comprises an outer ring and an inner ring, a plurality of spherical graphite points are evenly dispersed in the outer ring, the inner ring is arranged on the inner wall of the outer ring, and the outer ring and the inner ring are integrally formed in a composite casting mode. According to the centrifugal bimetal composite graphite steel roller ring, the multiple graphite points are arranged in the components of the outer ring, the outer ring is changed into graphite steel through the graphite points, the graphite points can restrain crack propagation generated by thermal fatigue in the rolling process of the steel roller ring, the single-time rolling steel passing amount of the steel roller ring is increased, few cracks are generated, the fatigue layer repairing amount of the rolled roller ring is reduced, and the service life of the roller ring is prolonged. Roll consumption can be reduced, and machining cost is saved.

The invention discloses a novel process for preparing a ceramic alloy roller sleeve, comprising: (1) preparing a ceramic prefabricated block: pre-treating ceramic particles; making an aluminum mold for the ceramic prefabricated block; mixing various materials to prepare the ceramic prefabricated block; (2) installing the ceramic prefabricated block on a metal outer mold of the roller sleeve: pre-processing a plurality of holes on the left and right halves of the metal mold of the roller sleeve, filling the holes with water glass sand, and then installing the ceramic prefabricated block after drying; aligning the positions of the nail holes on the ceramic prefabricated block with the positions of the holes on the metal mold, inserting the self-tapping screws from the nail holes of the ceramic prefabricated block and screwing them into the water glass sand; closing the metal mold; smelting high-chromium molten iron; casting the metal mold to obtain a high-temperature roller sleeve blank; heat treatment; and machining to obtain a finished roller sleeve.

This utility model discloses a high-strength composite structure drill bit, relating to the field of drill bit technology, comprising: a reinforcing rod; a cutting assembly disposed on the outer circumference of the reinforcing rod; a fixing assembly disposed on the outer circumference of the reinforcing rod and the cutting assembly for fixing the reinforcing rod and the cutting assembly; and a composite layer disposed on the surface of the cutting assembly for high-strength protection. This utility model, by setting auxiliary spiral grooves and gradually decreasing the spiral angle from the bottom to the top of the drill bit, optimizes the guidance and discharge path of waste chips according to the needs of different stages during drilling. This not only improves chip removal efficiency and reduces pressure backflow caused by waste chip blockage, but also enhances drilling speed and the stability of the drilling process.

The invention discloses a nano-zirconia dispersion liquid and a preparation method thereof, an optical coating liquid, an optical film and application thereof, and relates to the technical field of materials. The nano zirconium oxide dispersion liquid comprises modified nano zirconium oxide and a first organic solvent, and a modifier of the modified nano zirconium oxide comprises a coupling agent and polymer resin; wherein the polymer resin is poly (isobornyl acrylate-co-polyethylene glycol methacrylate). A flexible segment of polyethylene glycol methacrylate in the polymer resin provides better flexibility for the optical film, and a bridge ring structure of isobornyl acrylate forms a net structure with high crosslinking density in a film forming process and reduces internal stress in a photocuring process, so that better hardness performance is provided for the optical film; the nanoscale particle size zirconium oxide significantly improves the dispersion uniformity, reduces light scattering, improves the light transmittance and light transmission uniformity of the optical film, and reduces the haze of the film. And the method is expected to be popularized and applied in the frontier fields of high-precision optical systems, flexible display and the like.

The invention relates to the technical field of high-hardness composite material laser additive manufacturing, in particular to a high-hardness gradient composite material laser additive manufacturing device and method.The high-hardness gradient composite material laser additive manufacturing device comprises an environment sealing system, a powder storage part, a powder conveying line, a tail end powder outlet part and a laser main light cylinder; the tail end powder outlet part and the laser main light barrel are both installed in the environment sealing system, the laser main light barrel is located in the middle of the environment sealing system, and the tail end powder outlet part comprises a first tail end powder outlet mechanism, a second tail end powder outlet mechanism, a third tail end powder outlet mechanism and a fourth tail end powder outlet mechanism. Manufacturing of a high-hardness composite material structure is achieved through laser additive manufacturing, one or more materials with the high hardness performance are embedded into a metal matrix through laser additive manufacturing, the materials with the high hardness performance basically do not participate in metal recrystallization in the additive manufacturing process, and the material performance is completely reserved; and laser additive manufacturing of products with special requirements such as complexity and light weight can be achieved.