9results about How to "Tissue distribution" patented technology

The embodiment of the invention provides a preparation method of a sliding bearing composite coating and the sliding bearing composite coating, and relates to the technical field of surface engineering.The method comprises the steps that nickel-based base coat alloy powder and copper-based alloy surface layer powder are dried; a cladding head is aligned with a to-be-cladded area of the sliding bearing, nickel-based priming layer alloy powder is evenly fed into the surface, aligned with the cladding head, of the sliding bearing through a scraping disc type pressure powder feeder on the basis of first technological parameters, the nickel-based priming layer alloy powder is molten into molten drops, and the molten drops and the surface of the sliding bearing form a micro molten pool; carrying out continuous cladding to form a nickel-based bottoming layer; and after the sliding bearing with the surface cladded with the nickel-based bottom layer is cooled, the nickel-based bottom layer is polished to be smooth, copper-based alloy surface layer powder is evenly fed into the surface of the nickel-based bottom layer through a scraping disc type pressure powder feeder on the basis of second technological parameters, and the copper-based alloy surface layer is formed on the surface of the nickel-based bottom layer through continuous cladding. And the sliding bearing clad with the composite coating is obtained. The quality can be improved.

This invention discloses a method for preparing tantalum target blanks using DS continuous rolling, comprising the following steps: S1, hot forging a tantalum ingot and performing intermediate annealing during the forging process to form a rectangular tantalum plate; S2, performing DS continuous rolling on the rectangular tantalum plate to form a tantalum target blank; S3, leveling the tantalum target blank and then performing vacuum heat treatment. The tantalum target blank prepared by this invention has no texture gradient problem in the thickness direction, a more uniform microstructure distribution, and randomly distributed grain orientation. Combined with the heat treatment process, the grain size is uniform and finer, achieving a grain refinement of more than 30% compared to synchronous rolling. It simplifies multiple processes and replaces manual rotating target blank rolling, significantly improving production efficiency. It is suitable for large-scale batch production, and the target blank diameter is not limited by the ingot diameter, allowing for the preparation of target blanks with larger diameters. It exhibits stable sputtering performance and significantly improves the uniformity of tantalum film thickness, making it widely applicable in coating fields such as electronic devices and the semiconductor industry.

The invention discloses a kappa-carrageenan / Zein / ZIF-8 (at) Thy composite membrane as well as a preparation method and application thereof, and belongs to the technical field of biological composite membranes. The composite membrane is a kappa-carrageenan / Zein / ZIF-8 (at) Thy composite membrane which is synthesized by taking hydrophilic polysaccharide (kappa-carrageenan), hydrophobic protein (zein Zein) and a metal organic framework (ZIF-8) carrying medicine (Thy) as raw materials; the ZIF-8 (at) Thy is chemically crosslinked with active groups on the natural polymer kappa-carrageenan and the zein Zein, so that the ZIF-8 (at) Thy becomes a good interface lubricant between the hydrophilic natural polymer and the hydrophobic zein, the interface compatibility between the kappa-carrageenan and the zein is improved, the water absorption performance and the oxidation resistance are improved, and the water absorption performance and the oxidation resistance are improved. Meanwhile, the ZIF-8 is used as a slow release platform of the medicine and is sensitive to pH, and the medicine is slowly released from the metal framework and can resist bacteria for a long time, so that the ZIF-8 has stable long-acting antibacterial performance.

The invention relates to a high-purity target material preparation process based on gold waste, and belongs to the technical field of target material preparation. By optimizing purification steps and process parameters, efficient purification of the gold waste is achieved, meanwhile, vacuum melting process parameters are regulated and controlled, energy consumption and emission of harmful substances are reduced, and the concept of sustainable development is met. Preferably, a mixed solution of dibutyl carbitol and sec-octanol is used as an extraction agent, so that the gold purification efficiency and selectivity are remarkably improved, and accurate separation of the gold from the waste is ensured. A two-section smelting technology is combined with reasonable setting of annealing parameters, and the gold target material which is uniform in component, high in mechanical strength and excellent in performance is prepared. According to the method, resource utilization of the gold waste is achieved, the environmental load is reduced, and the prepared target material meets the high-performance application requirement and has remarkable economic and environmental benefits.

The present application relates to a kind of crusher super wear-resistant cone lining plate steel and its preparation method, contains the following components by mass percentage: C:1.30-1.50%, Mn:22-25%, Si:0.35-0.80%, Cr:2.0-2.5%, V:0.1-0.15%, Ti:0.06-0.12%, N:0.05-0.08%, Mo:0.3-0.6%, P≤0.035%, S≤0.015%, the balance is Fe and inevitable impurities.Mass ratio of Mn / C is 16-18, mass ratio of Cr / V is 16-20, and total mass ratio of Cr+Mo≤2.8%.The hardness of steel can reach 289HB, impact toughness can reach 203J / cm 2 , tensile strength can reach 849MPa, reduce the mass addition of Ni, Mo and other elements, greatly reduce cost.

The invention provides a preparation method of a gallium oxide ceramic target material, and relates to the technical field of preparation of oxide target materials and preparation of semiconductor target materials. The method comprises the following steps: weighing a pure-phase gallium oxide target material by using an electronic scale, pouring powder into an alumina crucible, adding a proper amount of a binder, stirring, granulating, screening by using a proper screen, pouring into a mold, vibrating, and uniformly paving; and then preparing the pure gallium oxide target material by adopting a hydraulic machine for tabletting, sintering and other processes. The steps of mixing, drying and the like are added before granulation of the doped tin oxide target material. The target material prepared by the method is not easy to fall off powder, damage and the like in the transfer process. The ceramic target material sintered at 1200-1800 DEG C for 16-32 hours after low-temperature baking and degumming is smooth in surface and compact in structure, and the phenomena of damage, splashing and the like cannot occur in the use process of the subsequent laser technology.

The invention provides a low-oxygen WRe / TZM metal target disc for a bulb tube of a CT machine and a preparation method of the low-oxygen WRe / TZM metal target disc. The method comprises the following steps that S1, WRe alloy powder is weighed and dried, and a TZM alloy plate blank is cleaned and dried; (S2) the WRe alloy powder and the TZM alloy plate blank are loaded into gradient molds correspondingly, and pre-pressing forming is conducted; s3) putting the gradient mold filled with the pre-pressed and formed blank into a furnace chamber of an SPS sintering furnace, vacuumizing to be below 6Pa, and sintering to obtain a WRe / TZM composite sintered blank; and S4) carrying out machining to obtain the WRe / TZM metal target disc. The metal target disc has the advantages of being high in density, uniform in structure distribution, low in content of impurities such as gas, high in molybdenum alloy matrix strength, good in machining performance, high in heat dissipation capacity, good in thermal shock resistance and the like, and the interface achieves good metallurgical bonding.

The utility model discloses a kind of concave hemispherical metal superhard grinding wheel forming die and sintering mould, the concave hemispherical metal superhard grinding wheel forming die includes mould frame and the upper pressing block in mould frame, lower pressing block;The upper pressing block is located above lower pressing block;The side of upper pressing block and abrasive layer contact is concave arc structure;The side of lower pressing block and abrasive layer contact is convex arc structure;The upper pressing block includes support, core rod;The inside wall of mould frame is stepped structure;The upper portion of support extends outward and forms lug;The lug is located on stepped structure;The height of stepped structure is consistent with the height of lug;Lower pressing block is set or not set with ring. The utility model can effectively avoid the large excess amount of concave hemispherical grinding wheel, solve the problem of raw material waste, cost increase in prior art, improve production efficiency, and there is no matrix when pressing, guarantee the compactness of abrasive layer organization and grinding wheel quality.

The present invention relates to the technical field of stainless steel, and specifically to a highly corrosion-resistant hard stainless steel and its preparation process. The present invention uses stainless steel as a substrate, performs laser cladding on its surface, utilizes nickel-based alloys and reinforcing phases in different proportions, and the reinforcing phases are compounded by nickel-coated tungsten carbide powder, cerium oxide, yttrium oxide and lanthanum oxide to improve the corrosion resistance of the stainless steel, and performs ultrasonic impact after laser cladding, so that the surface hardness and wear resistance of the prepared stainless steel are improved. The scheme of the present invention is reasonably designed, the formula of each layer structure component of the product is appropriately adjusted, and the prepared stainless steel has excellent corrosion resistance, and the surface hardness and wear resistance meet the actual production needs, and can be widely used in many fields.