9results about How to "Improve isotropy" patented technology

This invention discloses a passive oscillating arc dual-wire additive manufacturing particle-reinforced coating system, belonging to the technical field of surface modification equipment. It includes a worktable, a cladding coating welding torch, a coaxial powder feeding particle reinforcement system, a powder feeding mechanism, a wire feeding mechanism, and a high-frequency reciprocating oscillating arc mechanism. The cladding coating welding torch is mounted on a vertical Z-axis platform. The coaxial powder feeding particle reinforcement system includes a coaxial powder feeding welding torch with a powder feeding channel inside. The powder feeding mechanism is connected to the powder feeding channel. The wire feeding mechanism includes a first wire feeder and a second wire feeder. This invention uses the coaxial powder feeding particle reinforcement system to precisely introduce argon-carried particle reinforcement material into the arc molten pool, achieving stable particle delivery and uniform distribution under argon protection. The high-frequency reciprocating oscillating arc mechanism drives the workpiece to achieve rapid oscillation in the width direction, significantly improving the uniformity and density of the formed coating.

The invention belongs to the technical field of optical microscopic imaging, and particularly relates to a single objective lens light sheet microscopic imaging system, which comprises an exciting light modulation light path, a fluorescence detection light path and a microscopic imaging system, and is characterized in that the exciting light modulation light path is used for generating an illumination light sheet to excite fluorescence, and specifically comprises a laser, a beam expanding collimating lens group, a modulator, a scanning system and the like. The microscopic imaging system is used for transmitting an illumination light sheet and collecting light emitted by a sample, and comprises a dichroscope, a galvanometer module, an image rotating system, a tubular lens, an objective lens and the like. And the fluorescence detection light path comprises a relay lens group, a modulation element, a band-pass optical filter, a camera and the like. According to the invention, tasks of light sheet illumination and fluorescence collection in a traditional double-objective light sheet microscope are completed through a single objective, a remote focusing system or a micro-mirror reflection structure commonly used in an existing single-objective light sheet microscope does not need to be used, and a light sheet orthogonal to a focal plane is adopted for illumination. Compared with the existing light sheet microscope technology, the method has higher usability and flexibility, allows free switching of objective lenses under the condition of not changing other light paths, is compatible with any objective lens and various samples, does not need any software processing including deskewing in the principle of an obtained image, can directly display and use an original image, and is high in practicability. The system has higher resolution and is close to ideal isotropic imaging when various objective lenses are used for imaging.

The invention discloses a manufacturing method of a 6061T6 aluminum alloy rotating shaft die forging, and particularly relates to the technical field of aluminum alloy rotating shaft die forging manufacturing, which comprises the following steps: firstly heating a blank to a first temperature for heat preservation, then heating to a second temperature for heat preservation, and simultaneously heating a die for heat preservation; upsetting, drawing, squaring, chamfering, rolling and pre-forming the homogenized blank, monitoring the temperature of the blank in real time in the process, and carrying out remelting heat preservation control; and the blank obtained after blank making is transferred into a preheating die, closed die forging is conducted at the sectional strain rate under the isothermal condition, and the final forging temperature is controlled. Through cooperation of multiple processes, grain refinement and structure homogenization are achieved, the strength, plasticity and fatigue life of the forged piece are remarkably improved, meanwhile, the material utilization rate and the process stability are greatly improved, and the method is suitable for batch manufacturing of high-performance aluminum alloy rotating shafts in the fields of aerospace, automobiles and the like.

This invention discloses a high-density, high-strength "three-layer structure" carbon-based composite material and its preparation method. The method includes: mixing activated coke with a D50 of 3-6 μm and microcrystalline graphite powder with a D50 of 10-60 μm to obtain a mixed powder; kneading the mixed powder in a kneading pan, removing moisture, heating to 160-240℃, then adding a molten binder or modified binder, and simultaneously adding a modifier, followed by kneading with the lid closed; after kneading, pouring the mixture into a rolling mill for rolling, then crushing and sieving to obtain pressed powder; vacuum-treating the pressed powder, then molding and isostatically pressing to obtain green blocks, and finally calcining to obtain the carbon-based composite material. This invention has a short production cycle and low cost. The carbon-based composite material obtained has a one-layer interface structure, a two-layer brazed structure, and a three-layer steel-concrete structure. The special "three-layer" structure design achieves a dual effect of "reinforced aggregate complementarity + micro-active layer construction," which can effectively improve the bulk density, mechanical strength, homogeneity, and stability of the carbon-based composite material.

The application provides a micro-nano ceramic particle reinforced die steel with high impact performance and a preparation method. The preparation method comprises the following steps: putting TiAl alloy powder, BN powder and C powder into a mixing machine to obtain a mixture 1, and using pure aluminum strip to coat the mixture 1 to obtain a wire A; the wire A is subjected to buffer segmented electric explosion 1 to obtain a mixture 2; putting NbAl alloy powder and B4C powder into a mixing machine to obtain a mixture 3, and using pure aluminum strip to coat the mixture 1 to obtain a wire B through coating forming 2; the wire B is subjected to buffer segmented electric explosion 2 to obtain a mixture 4; the mixture 2 and the mixture 4 are coated by using stainless steel strip through coating forming 3 to obtain a wire C; the die steel is melted into a molten steel, the wire C is added into the molten steel, and then vacuum degassing, electroslag remelting, high-temperature diffusion, multi-directional forging and heat treatment are carried out to obtain the micro-nano ceramic particle reinforced die steel with high impact toughness. The longitudinal unnotched impact energy of the die steel is 578.9-601.6 J, the transverse unnotched impact energy is 576.7-590.9 J, and the isotropy is 0.96-0.99.

The application belongs to the technical field of preparation and processing of high-temperature alloy materials, and particularly relates to a preparation method of mixed solid solution Ni-Pd-Re-Sc-Ti precision alloy slab. In order to realize composition homogenization and structure stability of the alloy on an atomic scale, the application adopts the following technical scheme: the mixed solid solution Ni-Pd-Re-Sc-Ti precision alloy slab contains Pd 21.14-30.42wt%, Re 5.41-14.79wt%, Sc 0.32-0.57wt%, Ti 3.24-5.12wt%, and the balance of Ni. The preparation method comprises the following steps: raw material preparation; smelting and casting to obtain an alloy billet; vacuum consumable melting to obtain an alloy rod; after drilling the alloy billet, the alloy rod is inserted into the alloy billet to obtain an alloy blank; preheating and rotary forging; wire drawing treatment; jacket forging; 2-pass hot rolling treatment after preheating; annealing treatment; 2-pass cold rolling treatment; and surface degreasing and cleaning. The mixed solid solution Ni-Pd-Re-Sc-Ti precision alloy slab prepared by the application has good tensile strength, yield strength, elongation and hardness.

The application relates to an electrode tab rolling equipment, which comprises a supporting platform, a dynamic rolling mechanism and a lifting mechanism; the dynamic rolling mechanism is located above the supporting platform, the lifting mechanism is connected with the dynamic rolling mechanism and is used for driving the dynamic rolling mechanism to move close to or away from the supporting platform in the vertical direction; the dynamic rolling mechanism comprises a bearing plate, a plurality of rolling units and a driving mechanism, the bearing plate is provided with a plurality of mounting holes corresponding to the rolling units; the rolling unit comprises a top shell and a rolling ball, and the top shell is rotationally installed in the mounting hole. Through the plurality of rolling units, the PTFE molecular chain is repeatedly combed and pulled in the two-dimensional plane of the tab, so that the PTFE molecular chain is changed from single orientation into a three-dimensional network structure intertwined and knotted in each direction, the isotropy and structural toughness of the fiber network in the tab are significantly enhanced, and the binding capacity of the active material particles is greatly improved.

The present application relates to the technical field of composite material processing, and particularly relates to a manufacturing method of a composite material polyhedron and the composite material polyhedron. The manufacturing method of the composite material polyhedron comprises a fiber cloth layering step and a hot-pressing forming step. The fiber cloth layering step comprises: step one, using initial layer fiber cloths to form a complete contour of the composite material polyhedron; at least one initial layer fiber cloth is in a bent state and has two bending sides, and a bending line between the two bending sides corresponds to an edge of the composite material polyhedron; step two, laying at least one secondary layer fiber cloth outside the initial layer fiber cloth, at least one secondary layer fiber cloth is in a bent state, and a bending line between the two bending sides of the at least one secondary layer fiber cloth corresponds to an edge formed by the edge butt joint of the two initial layer fiber cloths. Fiber cloths are covered between the adjacent surfaces of the corresponding edges to ensure the connection between the two adjacent surfaces, to realize one-time forming of a complex polyhedral composite material structure and to reduce subsequent processing.

This invention relates to the field of medical device technology, particularly to the field of intraluminal implantable medical devices, and especially to medical devices implanted into lumens via interventional procedures. Specifically, it discloses a fixation component for implantable medical devices and its preparation method, and also discloses implantable medical devices containing this fixation component, such as occlusion devices, particularly left atrial appendage occluders. The fixation component includes a central tube and a plurality of annularly arranged support rods branching outward from one end of the central tube. The plurality of support rods first converge on one side outside the opening of the central tube to form a crisscross arrangement, and then extend outward to form the radial outer edge of the fixation component. The fixation component has a stable structure, good safety, wide applicability, and can achieve good positioning within body cavities.