35results about How to "Strict process" patented technology

The invention relates to a preparation method of a graphene-reinforced aluminum matrix composite. Aiming at the conditions that graphene is nonuniformly dispersed in an aluminum alloy matrix and is difficult to combine with the matrix, the preparation method adopts a semi-solid squeeze casting method, and comprises the steps of smelting in a smelting and stirring atmosphere oven, electromagnetically stirring, pouring, and conducting squeeze casting to obtain the graphene-reinforced aluminum matrix composite. The preparation method is advanced in process, accurate and detailed in data, and precise in process; a slurry is pure; a metallographic structure is good in compactness without the phenomenon of shrinkage porosity; the prepared graphene-reinforced aluminum matrix composite has the hardness reaching to 87 HB, the tensile strength reaching to 255 MPa, the elongation reaching to 8%, and the compactness reaching to 99.6%; and the preparation method is the advanced preparation method of the graphene-reinforced aluminum matrix composite.

The invention relates to a semi-solid squeezing casting method and system for aluminum alloy and belongs to the technical field of preparation and application of nonferrous materials. The method comprises the following steps that firstly, an aluminum alloy block is cut into aluminum alloy pieces, the aluminum alloy pieces are wrapped with aluminum foil correspondingly, and then the wrapped aluminum alloy pieces are preheated; the preheated aluminum alloy pieces are smelted, so that molten aluminum alloy is obtained; the molten aluminum alloy is poured into a heat preservation device for heat preservation via a sprue with a bent channel or an inverted conical channel, and semi-solid aluminum alloy slurry is obtained; the semi-solid aluminum alloy slurry is poured into a heat preservation squeezing mold to be subjected to squeezing molding treatment; and finally, pressure application continues after the squeezing molding treatment is completed, then a casting is jacked out and subjected to air cooling, and an semi-solid aluminum alloy squeezed casting is obtained. According to the preparation method, the advanced process is achieved, procedures are precise, data are accurate and full, and after heat treatment of the prepared semi-solid aluminum alloy squeezed casting, the hardness of the casting can be up to 82.9 HB and the tensile strength of the casting can be up to 279 Mpa.

The invention relates to a preparation method of an aluminum, copper and iron quasicrystal. In order to solve the problem that process defects exist as the preparation method of the aluminum, copper and iron quasicrystal is difficult, the preparation method comprises the following steps: smelting and casting, quickly cooling, thermally treating and annealing and quenching to prepare an aluminum, copper and iron quasicrystal block material by adopting a medium-frequency induction smelting furnace casting method. The preparation method of the aluminum, copper and iron quasicrystal disclosed by the invention is advanced in process, accurate and full in data; the I phase of the quasicrystal is Al61.92Cu26.21Fe11.87, the product purity is high, the I phase content of the quasicrystal is 98%, the mechanical performances are stable, the hardness is 796HV, and therefore, the preparation method can be applied to various industrial fields and is a very ideal preparation method of the aluminum, copper and iron quasicrystal.

The invention relates to a die-casting method of a graphene enhanced aluminum based composite material, and aims at solving the problems of nonuniform dispersion and difficult combining with a substrate of graphene in an aluminum alloy substrate. A semi-solid die-casting method is adopted, the graphene enhanced aluminum based composite material is prepared through melting, heat preserving, electromagnetic stirring, tamping and die-casting. The method has the advantages that the technology is advanced, data is accurate and real, procedures are strict, slurry is purified, metallographical structure compactness is good, hole shrinkage and loosening are prevented, the hardness of the prepared graphene enhanced aluminum based composite material reaches up to 85 HB, the hardness is improved by 66% compared with the substrate, the tensile strength reaches up to 8%m the tensile strength is improved by 5% compared with the substrate, the compact degree reaches up to 99.6%, and the preparation method of the graphene enhanced aluminum based composite material is advanced.

The invention provides an OAuth2.0-based WEB authentication method of password service middleware. The method comprises the following steps: firstly, the password service middleware applies for authorization authentication to a verification server; the password service middleware performs DES encryption on user information submitted by a browser and a smart password key PIN code, and then sends the same to the verification server; after receiving a request, the verification server verifies the information of the password service middleware; the verification server verifies the decrypted user information and the PIN code, performs Subject login through a background server, encrypts an authorization permission certificate, and returns the authorization permission certificate to the middleware; after the middleware receives the authorization permission certificate, the middleware performs Subject login, and then sends a request to an authorization server; and the authorization server verifies the decrypted authorization permission certificate, and then issues an access token to the password service middleware. According to the OAuth2.0-based WEB authentication method provided by the invention, the user password is combined with the smart password key to further solve the problem that the OAuth2.0 protocol single password verification security is weak, the process is more rigorous,and the security guarantee of the authorization authentication process is enhanced.

The invention discloses an air-conditioning load prediction method based on big data. The method includes the steps: 1) acquiring outdoor temperature t in DEG C of a site with an air conditioner at a simulated prediction moment; 2) acquiring a temperature interval [t-s and t+s] based on a predetermined prediction step size s in DEG C and the outdoor temperature t; 3) screening data in the temperature interval from historically accumulated big data of cold or heat load measured values, total power of lighting and devices, the number of indoor people, open water surface area, indoor and outdoor air enthalpy differences and indoor and outdoor temperature differences of the air conditioner running under stable conditions; 4) calculating final load value of the prediction moment based on screened date. Based on a lot of gradually accumulated historical data of practical cooling capacity and heating capacity of the air conditioner running under the stable conditions, models for calculating cold or heat loads at the simulated prediction moment are continually optimized, and the built models are more accurate with the passage of time. The invention further discloses an air-conditioning load prediction system based on the big data.

The invention relates to a preparation method of a magnesium-zinc-yttrium quasi-crystal and boron carbide mixing enhanced magnesium-based composite material. The magnesium-zinc-yttrium quasi-crystal and boron carbide mixing enhanced magnesium-based composite material is prepared by taking a magnesium alloy as a substrate and taking endogenous quasi-crystal magnesium-zinc-yttrium and boron carbideas a strengthening phase through the steps of smelting in a vacuum intermediate-frequency induction smelting furnace, argon bottom blowing, mechanical stirring, squeeze casting and heat treating for the condition that a magnesium-based composite material is poor in mechanical property. According to the preparation method, the technology is advanced, the processes are strict, data are precise and full and accurate, the tensile strength of the prepared magnesium-based composite material reaches 315 MPa, the elongation of the prepared magnesium-based composite material reaches 7%, the hardness ofthe prepared magnesium-based composite material reaches 108 Hv, and the preparation method is an advanced preparation method for the magnesium-zinc-yttrium quasi-crystal and boron carbide mixing enhanced magnesium-based composite material.

The invention provides a particle-reinforced refractory high-entropy composite material and a preparation method thereof. The particle-reinforced refractory high-entropy composite material comprises a matrix phase and WC particles distributed in the matrix phase, wherein a Nb-Mo-Ta-W-Re alloy composed of Nb, Mo, Ta, W and Re elements serves as the matrix phase; and the mass of the WC particles accounts for 1-10% of the mass of the matrix phase. The Nb-Mo-Ta-W-Re alloy is adopted as the matrix phase and the WC particles are adopted as a reinforcing phase, so that the particle-reinforced refractory high-entropy composite material has high hardness, high compressive strength and stable structure performance; and meanwhile, the particle-reinforced refractory high-entropy composite material is prepared through ball-milling alloying and spark plasma hot-pressing sintering methods, the preparation is easy, and the application prospects are good.

The invention relates to a preparation method for cold-air-dried and seasoned mackerel fillets. The method comprises the following steps: preferably selecting mackerel as a raw material, removing the back bones and head of the mackerel, separating a mackerel body from the vertebra, and cutting the mackerel body into mackerel fillets; cleaning the mackerel fillets and soaking in seasoning liquid prepared by mixing boiled potherb mustard liquid, boiled hawthorn liquid, salt, melanin, red yeasts, soybean protein, lemon juice, raw ginger, Chinese prickly ash, anise, cassia bark and water in proportion; controlling the liquid content, arranging the seasoned mackerel fillets in a plate, supporting the plate on a drying net of a drying machine, pushing the plate into a cold air drying workshop for drying, quickly freezing, packaging, and checking to obtain the finished cold-air-dried and seasoned mackerel fillets. The method is reasonable in technology, strict in process, strong in operability, high in preparation efficiency and suitable for industrialized production; a mackerel fillet food prepared by the method is comprehensive in nutrition, unique in flavor, tender and soft in meat, free of peculiar fishy smell, convenient to eat and long in shelf life.

The invention discloses a large portal crane beam deformation measuring method based on an image and a geometric contour. The method comprises the following steps of firstly, acquiring different contour lines of a crane beam to obtain sequence image data; carrying out data preprocessing, and extracting the contour lines of the crane beam in the image; computing initial values of the length, the width and the center coordinates of a rectangular cross section of the crane beam; selecting a corresponding photo from a photo sequence through the transverse length of the given crane beam; carrying out iterative computation to obtain the length, the width and the center coordinates of a transverse section of the crane beam; and finally, carrying out subsequent analysis and decision-making on theobtained data. The method is low in requirement for personnel for field measurement, and does not need to have a relatively high skill requirement for field measurement like a traditional measuring method, and a relatively high measurement precision is kept for a long time; and the method is obtained by strict mathematical calculation, so that the whole process is stricter.

The invention relates to a preparation method of a magnesium-zinc-yttrium quasicrystal and titanium carbide synergistically strengthened magnesium-based composite materials. Aiming at the poor mechanical properties of magnesium-based composite materials, the magnesium-zinc-yttrium quasicrystal and inner Synergistically strengthened magnesium-zinc-yttrium-zirconium alloys with raw titanium carbide, and made magnesium-zinc-yttrium quasicrystals and titanium carbide synergistically strengthened magnesium matrix composites through smelting, argon bottom blowing, mechanical stirring, electromagnetic stirring and extrusion casting; this preparation The method has advanced technology, strict procedures, and accurate and detailed data. The tensile strength of the prepared magnesium-based composite material reaches 268MPa, the hardness reaches 93.5Hv, and the elongation rate reaches 8.1%. It is an advanced synergistic strengthening of magnesium-zinc-yttrium quasicrystal and titanium carbide. Preparation method of magnesium-based composite material.