5results about How to "Plastic" patented technology

The application relates to the field of new energy batteries, in particular to a positive pole piece, a preparation method thereof and a battery; the positive pole piece comprises a current collector, a positive pole active material layer arranged on at least one side of the current collector in the thickness direction and a glue layer arranged on the surface of the positive pole active material layer away from the current collector; the glue layer comprises a binder; the thickness ratio of the glue layer to the positive pole active material layer is 1: (10-100). The setting of the protective layer in the positive pole piece facilitates long-term storage and classification and temperature and humidity control of the positive pole piece; in the battery assembly process, the protective layer is peeled off, and the remaining current collector and coating structure are assembled with a diaphragm, a negative pole piece and other battery components, the operation is simple and easy to operate. Meanwhile, the setting of the glue layer can avoid energy loss caused by dropping of the positive pole active material.

This application provides a quenched and tempered steel plate and its production method. The quenched and tempered steel plate comprises the following components by mass percentage: C: 0.15–0.20%; Si: 0.20–0.40%; Mn: 1.20–1.50%; Cr: 0.20–0.50%; Ni: 0.10–0.20%; Nb: 0.020–0.040%; Ti: 0.010–0.040%; Mo: 0.30–0.50%; B: 0.0010–0.0025%; P≤0.015%, S≤0.004%; N≤0.004%, Als: 0.010–0.060%, with the remainder being Fe and unavoidable impurities. This application manufactures a thick, high-strength quenched and tempered steel plate with high surface quality by adjusting the elemental composition and content of the quenched and tempered steel plate, specifically by adding certain amounts of Ni, Cr, and B.

The present invention belongs to the technical field of high entropy alloy materials, and specifically relates to a cobalt-free high entropy alloy and a preparation method and application thereof. The raw materials of the cobalt-free high entropy alloy include Fe, Ni, Cr, Al and Ti. The alloy raw materials are subjected to vacuum arc melting under the protection of an argon atmosphere to obtain an alloy product, and then the alloy product is subjected to homogenization treatment, cold rolling treatment, and annealing treatment to obtain a cobalt-free high entropy alloy crystal structure of a single FCC structural phase, and the morphology of the precipitated phase in the alloy is mainly two-dimensional nanosheets or nanorods, which are densely distributed, and the average grain size is about 2μm, and it has excellent tensile mechanical properties, which solves the technical problem of insufficient strength of the FCC structural phase in the prior art, has excellent room temperature and medium temperature mechanical properties in nuclear industry applications, can meet the high mechanical performance requirements of nuclear power plant structural materials, and provide an optional material for the high service requirements proposed for the extreme working conditions faced by the development of the fourth-generation nuclear fusion reactor.

The application discloses a preparation method of wet sand as-cast high-strength high-plasticity nodular cast iron and belongs to the technical field of metal material casting. The method comprises the following steps: S1. raw material smelting: charging pig iron, scrap steel and furnace charge into a furnace, then adding silicon carbide and carbon additive in sections, and after all the raw materials are dissolved into iron liquid, performing slag removal, slag fishing and silicon carbide pretreatment; S2. spheroidizing treatment and inoculation treatment: adding spheroidizing agent into a spheroidizing ladle, covering steel sheet covering agent and silicon-barium-calcium inoculant, adding iron liquid, performing spheroidizing treatment and ladle bottom inoculation, and adding composite inoculant into the iron liquid during ladle pouring; S3. pouring: adding composite inoculant when pouring the iron liquid into a casting mold, and obtaining a product after cooling; the composite inoculant comprises the following components in percentage by weight: Si: 70.0%-80.0%, Sr: 0.05%-0.15%, Ti: 0.2%-0.6%, Nb: 0.1%-0.3%, and the balance is Fe. Through reasonable formula improvement and process improvement, the prepared nodular cast iron has good strength and toughness and good comprehensive performance.

The invention discloses a novel radioactive ray protection device, and relates to the technical field of radioactive ray protection, the novel radioactive ray protection device comprises an outer package, the inner part of the outer package is provided with a hollow part; a plurality of lead microspheres, the exterior of each lead microsphere is coated with a wear-resistant layer, and the hollow part is filled with each lead microsphere; the vacuumizing equipment is arranged on the outer package and is used for reducing gaps among the lead microspheres and fixing the shape of the outer package, the device is used for protection, the lead microspheres in the device can be adjusted in real time through a computer programmed control system, and gaps without the lead microspheres are only reserved at a scanning ray part; when a tumor patient is subjected to high-energy radioactive ray radiotherapy, the device is used for protection, the lead microspheres in the device are adjusted in real time, and only the lead microspheres at a radiotherapy radiation field part are in a vacant state; omnibearing radioactive ray protection is implemented to the maximum extent.