9results about How to "Wide process adaptability" patented technology

The invention discloses a cavitation shot peening surface strengthening method and system based on cooperation of high hydrostatic pressure and spherical focused ultrasound. The method comprises the following steps: establishing and maintaining a hydrostatic pressure environment higher than 0.1 MPa in a high-pressure processing cavity filled with a degassing liquid medium; the to-be-machined surface of the workpiece is positioned in a sound field focal region of the spherical focused ultrasound transducer; and in the high hydrostatic pressure environment, a transducer is driven to work so as to generate a cavitation bubble group in a space confinement range in a focal region of the transducer, and meanwhile, the workpiece is controlled to move according to a preset path, so that cavitation collapse impact acts on a target region on the surface of the workpiece. The device comprises a high-pressure processing cavity, a spherical focused ultrasonic transducer, a multi-degree-of-freedom movement mechanism and a control system. Through cooperation of high hydrostatic pressure constraint and the spherical focusing sound field, precise localization and energy strengthening of the cavitation effect are achieved, a plastic deformation layer can be efficiently and controllably introduced to the surface of a metal material, the surface hardness can be remarkably improved, a residual compressive stress layer is formed, surface layer grains are refined, and the method is suitable for precise surface strengthening of complex components.

This invention discloses a process for recovering germanium from germanium-silicon alloy waste, belonging to the field of germanium recovery technology. The process includes the following steps: S1. Oxidizing and roasting the germanium-silicon alloy waste to obtain roasted clinker; S2. Sulfidating and fixing the roasted clinker and pyrite to obtain activated clinker; S3. Leaching the activated clinker with sulfuric acid, followed by solid-liquid separation, and collecting the germanium-containing leachate; S4. Performing multi-stage countercurrent extraction on the germanium-containing leachate using an amine extractant to obtain a loaded organic phase; then back-extracting the loaded organic phase with an alkaline back-extraction solution to obtain a germanate solution; S5. Hydrolyzing and precipitating the germanate solution to obtain pure germanium dioxide. The roasting process of this invention fixes impurities and activates elemental germanium into soluble germanium dioxide. The purification stage efficiently separates germanium from other impurity ions, and the final hydrolysis precipitation controls product consistency. This invention's recovery process has high recovery efficiency and purity, is more environmentally friendly, and is expected to achieve large-scale production.

The invention discloses stainless steel wire straightening, calendering and automatic winding equipment which comprises a rack and further comprises a steel wire coil pay-off mechanism, a first tension guide wheel mechanism, a stress straightening mechanism, a calendering mechanism, a second tension guide wheel mechanism, a wire arranging wheel mechanism and a flat wire winding mechanism which are arranged on the rack. The steel wire coil pay-off mechanism is used for outputting a whole coil of stainless steel wires; the tension guide wheel mechanism I is used for adjusting tension and guiding the steel wire to be conveyed to the stress straightening mechanism; the stress straightening mechanism is used for circumferentially twisting the conveyed steel wire so as to release the multi-dimensional stress of the steel wire; the calendaring mechanism is used for calendaring the steel wire subjected to stress straightening into a flat shape; the second tension guide wheel mechanism is used for adjusting tension and guiding the rolled flat steel wire to be conveyed to the wire arranging wheel mechanism. The wire arranging wheel mechanism is used for guiding the steel wire to be wound neatly and tightly in the winding process. And the flat wire winding mechanism is used for winding the calendered flat steel wire.

The application discloses a kind of core-shell structure fast charging long cycle artificial graphite, its preparation method, negative electrode material and purposes, including, petroleum coke or acicular coke aggregate D50 8~20 μm, non-biomass hard carbon raw material powder D50 1~10 μm and pitch are mixed according to the mass ratio hard carbon: pitch = 1:9~5:5, aggregate: composite coating agent = 95:5~85:15, pre-mixing S1 is carried out at 100~200 DEG C, 160~220 DEG C melt kneading granulation S2, carbonization S3 is carried out at 600~1000 DEG C, and graphitization S4 is carried out at 2800~3200 DEG C, and core-shell structure artificial graphite is prepared by one-step method.The shell layer is composed of uniformly dispersed graphitized hard carbon and soft carbon, and is densely coated outside the artificial graphite core.The first reversible specific capacity of the product is greater than or equal to 350 mAh / g, the first coulombic efficiency is greater than or equal to 93%, and the capacity retention rate at 5.0C / 0.2C is greater than or equal to 84%, with excellent fast charging performance and cycle stability, simple process and low cost.

The invention discloses an intelligent mold-free wall type sole pressing machine and a pressing method thereof.The intelligent mold-free wall type sole pressing machine comprises a base, a first flexible filler, a first driving device, a second driving device, a second flexible filler and a liquid driving device, the first flexible filler is provided with a first inner cavity, the first flexible filler is arranged on the base, the first inner cavity is provided with a first channel, and the first channel is provided with a second channel; the two side wings are arranged on the bottom carrier in a swinging mode, the two first driving devices are arranged on the outer sides of the side wings correspondingly and used for driving the side wings to swing, the second flexible filler is provided with a second inner cavity, and the two sets of second flexible filler are located between the ends of the two side wings correspondingly. The second driving device is used for driving the second flexible filler to move between the positions extending into the middle parts of the two side wings or the positions far away from the middle parts; and the liquid driving device is used for conveying liquid with preset pressure to the first inner cavity and / or the second inner cavity and forcing the inner walls of the first flexible filler and the second flexible filler to deform.

The application discloses a grain boundary adjustment preparation method of high-corrosion-resistance white copper alloy pipe. The method comprises the following steps: (1) pipe blank pretreatment: selecting a hot extrusion processing white copper alloy pipe blank as a base material, and pretreating the pipe blank to remove surface oil stains, oxide scales and surface defects; (2) deformation heat treatment: performing multi-pass "small deformation cold working-low temperature annealing" cycle processing on the pretreated pipe blank, wherein the single-pass cross section deformation amount is 5-20%, and after completing one pass of small deformation cold working, one annealing heat treatment is immediately performed, the annealing temperature is 700-750 DEG C, and the holding time is 80-120 min; (3) finishing and sizing treatment: after completing the whole deformation-annealing cycle process, performing finishing and sizing treatment on the pipe to obtain a finished white copper alloy pipe. Through the multi-pass small deformation-low temperature annealing cycle process, the grain boundary structure is gradually reconstructed, the proportion of special heavy site array grain boundaries in the total grain boundary length is greatly improved, and the corrosion resistance of the white copper pipe is further enhanced.

The invention provides a coating device and process for a fuel cell composite membrane, and belongs to the technical field of cell composite membranes. The invention provides a fuel cell composite membrane coating device which comprises a base membrane unwinding unit, a first coating unit, a first curing unit, a supporting layer unwinding unit, a composite unit, a second coating unit, a second curing unit and a finished product winding unit, and the invention further provides a coating process based on the device. The device is low in equipment cost, compact in structure, wide in process adaptability, excellent in film forming quality, high in production stability, high in yield, low in energy consumption and high in efficiency.

This invention proposes a spherical polylactic acid (PLA) powder with a wide sintering window, its preparation method, and its application. The preparation method includes the following steps: S1, mixing a poor solvent and PLA granules, adding the mixture to a reaction vessel, stirring, first heating, then holding at that temperature; S2, then cooling to 100-118°C, holding at that temperature for 30-60 minutes; S3, removing the product, washing and drying the product to obtain the spherical PLA powder. This invention is based on thermally induced phase separation, adding a spheroidization step to increase the crystallinity and sphericity of the PLA powder. The prepared spherical PLA powder has a particle size distribution of 10-120 μm and a bulk density of 0.3-0.45 g / cm³. 3 The powder possesses high fluidity, a wide sintering window, and excellent sintering performance, while retaining the excellent greenness and biocompatibility of polylactic acid. PLA parts formed by LPBF printing using the spherical PLA powder prepared in this invention exhibit good mechanical properties.

The invention relates to a SiC particle reinforced aluminum-based composite material and a preparation method and system thereof. The preparation system of the SiC particle reinforced aluminum matrix composite comprises a zoning temperature control smelting device, the interior of the zoning temperature control smelting device is divided into a lower zone and an upper zone in the height direction, and the lower zone and the upper zone are provided with independent temperature control units used for achieving differential temperature control of the lower zone and the upper zone; the stirring device comprises a double-layer stirring head extending into the partition temperature control smelting device, the lower section of the double-layer stirring head is arranged to be a dispersing structure for providing strong shearing force, and the upper section of the double-layer stirring head is arranged to be a reverse propelling structure for forming downward circulation; and the powder spraying device comprises a powder spraying pipe, and at least two layers of powder outlets are formed in a pipe body of the powder spraying pipe in the length direction of the pipe body and used for spraying the SiC particles into the melt from different heights. According to the preparation system, by cooperatively regulating and controlling the smelting temperature field, the stirring flow field and the particle conveying field, precise control over the microstructure of the composite material is achieved, and the material performance and the stability of the preparation process are remarkably improved.