19results about How to "Low process temperature" patented technology

The invention relates to a method for eliminating residual stress in additive manufacturing of nickel-based superalloy, and relates to the technical field of additive manufacturing materials. According to the main technical scheme, stress relief treatment is carried out in the mode that continuous pulse current treatment is applied to the additive manufacturing nickel-based superalloy, so that at least part of residual stress in the additive manufacturing nickel-based superalloy is eliminated, and the additive manufacturing nickel-based superalloy subjected to stress relief treatment is obtained. According to the method, the residual stress in the additive manufacturing nickel-based superalloy can be effectively reduced. According to the method, the internal structure state of the original alloy is not changed, meanwhile, the method is low in treatment temperature, short in treatment time, more efficient and more energy-saving, and the requirement for green and sustainable development of the current industry is met.

The invention relates to an efficient photovoltaic module metal resource recovery method based on supercritical fluid, and aims to realize environment-friendly recovery of high-value metals such as silver, copper and aluminum in a photovoltaic module. According to the invention, supercritical carbon dioxide (CO2) is adopted as a green solvent, and an organic auxiliary agent and a coordination agent are added, so that the metal dissolving capacity is enhanced. The process comprises the steps of assembly crushing, supercritical extraction, pressure regulation and control, metal deposition and the like, and selective recovery of different metals is achieved by optimizing temperature and pressure conditions. According to the method, waste liquid pollution of a traditional acid-alkali method is avoided, the energy consumption is low, the recovery rate is high, supercritical CO2 can be recycled, and the cost and the environmental influence are reduced. The process can be widely applied to metal resource recovery of photovoltaic modules and other electronic wastes, and an innovative solution is provided for realizing green economy and sustainable development.

According to the zirconia implant surface modification treatment system and the transparent electrode preparation method, the upper end of a glass tube of the system is connected with a pneumatic connector, and the pneumatic connector is connected with a vacuum pump through a pipeline; the transparent electrode is sprayed on the outer wall of the glass tube; the rod-shaped electrode is fixed in the center of the inner side of the lower end of the glass tube; the zirconium oxide implant is inversely arranged above the rod-shaped electrode and is tightly attached to the rod-shaped electrode; the spraying area of the transparent electrode on the outer side of the glass tube completely wraps the zirconium oxide implant, and the spraying area of the transparent electrode on the outer side of the glass tube further wraps a rod-shaped electrode with a preset length; the transparent electrode is electrically connected with a low-voltage electrode of the plasma power supply, the rod-shaped electrode is electrically connected with a high-voltage electrode of the plasma power supply, and the plasma power supply excites plasmas through the transparent electrode and the rod-shaped electrode so as to modify the surface of the zirconium oxide implant. According to the method, the problems of limited use scene, difficulty in visual presentation, poor processing effect, high cost and incapability of meeting immediate processing in the prior art are solved.

The present invention provides a process for reducing graphitization of carbon steel, comprising the following steps: heating the carbon steel to 1000°C for austenitization and heat preservation, and then performing a controlled rolling and controlled cooling process to reduce the degree of graphitization of the carbon steel. The present invention uses a controlled rolling and controlled cooling process to roll in the non-recrystallization zone of austenite of high carbon steel, increase the deformation band in the deformed austenite grain, form fine lamellar pearlite or annealed pearlite, reduce the diffusion distance of carbon and prevent carbon from agglomerating to form graphite. After graphitization of high carbon steel, gas expansion will occur, and the product is prone to cracks. At present, alloy elements such as chromium, titanium, and niobium are usually added to the steel to prevent graphitization, which is expensive. The process method provided by the present invention does not need to add the above alloy elements, and can eliminate the graphite that has been formed in medium and high carbon steels; the process method of the present invention is simple to operate, has a low processing temperature, and has a low application cost, and can process ordinary medium and high carbon steels with graphitization problems.

The invention discloses an ultra-high hardness surface-strengthened GGr15 steel and a preparation method thereof, and belongs to the technical field of heat treatment of metal materials. The invention discloses an ultra-high hardness surface-strengthened GGr15 steel preparation method, which adopts a multi-stage composite carbonitriding process to quickly and efficiently form dispersed granular carbonitriding compounds on the surface of GGr15 bearing steel, which can not only realize high-efficiency carbonitriding on the surface of bearing steel, but also avoid abnormal growth and coarsening of carbonitriding compounds, and significantly improve the surface hardness and wear resistance of steel; the method significantly improves the carbonitriding speed and shortens the processing cycle, thereby realizing the practicality, economy and effectiveness of the carbonitriding treatment process, and the reagent cost used in the method is low, and the processing temperature and processing time are significantly reduced, showing great potential in energy saving, emission reduction and cost reduction.

This invention provides a method for preparing high-nitrogen-content vanadium-containing steelmaking additive silicon vanadium ferronitride, comprising the following steps: 1) mixing vanadium oxide and a carbon source at a C / O molar ratio of 0.8-1, briquetting the mixture, and then placing it in a nitrogen atmosphere for a reduction nitriding reaction at 1100-1400 °C to obtain a one-step product; 2) crushing the one-step product obtained in step 1), mixing it with a silicon source and an iron source, briquetting the mixture, and then placing it in a nitrogen atmosphere for densification treatment at 1300-1500 °C to obtain high-nitrogen-content silicon vanadium ferronitride, wherein the silicon source is ferrosilicon and / or silicon. This invention can obtain high-purity, uniformly composed, and highly dense silicon vanadium ferronitride, improving the automation level and continuous production capability of the production process.

The application belongs to the technical field of stainless steel preparation, and discloses a cold-deformable and heat-treatable hardening Ni-free high-strength stainless steel and a preparation method thereof. The stainless steel comprises the following components in percentage by mass: Cr: 13-15%, C: 0.25-0.4%, Mn: 0.5-2%, Cu: 0.1-3%, Mo: 2-3%, Si: 0-0.5%, and the balance of Fe and inevitable impurities. The stainless steel does not contain Ni element, has a low work hardening rate (strain hardening index n≤0.185) and a fracture elongation rate of more than 20% in a soft state (annealed state), is cold-deformable, and has low raw material and processing costs; after quenching and aging heat treatment, the stainless steel not only has an optimal combination of strength and toughness (yield strength and tensile strength are more than 1300 MPa and 1600 MPa respectively, and elongation is greater than 10%), but also has a high yield strength ratio.

The application relates to the technical field of ultra-high-temperature ceramic materials, in particular to a preparation method of an ultra-high-temperature ceramic material, which comprises the following steps: uniformly mixing silicon-yttrium alloy powder I, zirconium boride and graphite to obtain initial powder; under an inert atmosphere, performing ball milling treatment on the initial powder, then performing forming processing to prepare ceramic green body material; and performing reaction melt impregnation on the ceramic green body material and silicon-yttrium alloy powder II at 1200-1500 DEG C to obtain ZrB2-YSi2-SiC ultra-high-temperature ceramic material. The application adopts the method of reaction melt impregnation to prepare high-density ultra-high-temperature ceramic material; under a high-temperature service environment, the binary-doped modified ZrB2 ceramic forms a dense oxide layer under high-temperature oxidation conditions, so as to improve the anti-oxidation corrosion performance of the material.

The present invention belongs to the technical field of olive oil processing, and specifically relates to a method for extracting olive oil. In order to increase the oil yield of olive oil and reduce the problem of loss of nutrients in olive oil, the present invention provides a method for extracting olive oil assisted by a high-voltage pulse electric field, comprising the following steps: washing and crushing olive fruits, sequentially performing high-voltage pulse treatment, stirring and fusing, solid-liquid separation, oil-water separation, and standing. The present invention uses a high-voltage pulse electric field to increase the oil yield of olives, reduce the acid value and peroxide value of olive oil, and increase the unsaturated fatty acid content, thereby improving the quality of olive oil, which is of great significance to the production of olive oil.

The invention belongs to the technical field of alloy surface oxidation films, and particularly relates to a preparation method of a Zr-Nb alloy surface pre-generated oxidation film and an alloy product thereof, and the preparation method comprises the following steps: carrying out high-temperature oxidation treatment on a Zr-Nb alloy by adopting high-temperature water vapor, and enabling the oxygen content in the high-temperature water vapor to be greater than or equal to 100 mu g / kg so as to form an oxide film on the alloy surface; the problem that the growth quality of an alloy pre-formed film in the prior art is difficult to meet the use requirement of a reactor structural member is solved by oxidizing the water vapor and controlling the rising concentration in the water vapor.

The application relates to a method for preparing a low-temperature high-activity catalyst by a semi-dry ball milling method and application, and the method comprises the following steps: S110, preparing mixed mud B containing active component salt and carrier salt; S120, stirring the mixed mud B at a temperature of 20-40 DEG C to obtain a semi-dry viscous precursor mud; S130, ball milling the semi-dry viscous precursor mud product to obtain a high-uniform-dispersion precursor mud; and S140, drying and calcining the high-uniform-dispersion precursor mud to obtain a low-temperature high-activity catalyst. The catalyst has a low tail gas (NOx, VOC and CO) treatment temperature and high reaction catalytic activity, and the preparation method is simple in operation and simple in equipment requirement.

This invention discloses a PECVD equipment and a silicon wafer passivation method. The PECVD equipment includes a reaction chamber and an RF power supply. The reaction chamber includes a base, an electrode plate vertically disposed within the reaction chamber, and a wafer cassette. The wafer cassette is used to hold multiple stacked silicon wafers and is positioned at a predetermined location on the base, such that the wafer cassette, after entering the reaction chamber, can be arranged on both sides of the electrode plate. The wafer cassette has an opening so that the passivation-to-be-treated sides of the stacked silicon wafers face the electrode plate. The RF power supply is electrically connected to the electrode plate. The wafer cassette and the base are grounded. The reactive gas introduced into the reaction chamber dissociates to form plasma, which is then deposited on the passivation-to-be-treated sides of the silicon wafers adjacent to the electrode plate. This invention avoids the need for plating around the wafer, shortens process time, reduces process temperature, improves equipment efficiency, and reduces breakage rate.

The invention relates to the technical field of material surface treatment, in particular to a salt bath chromium plating method for the surface of diamond powder. By adopting a composite chloride system with magnesium chloride as a main component and alkali metal chloride as an auxiliary component, a low-melting-point co-melt can be formed in the salt bath chromium plating process, the melting point can be reduced to 700 DEG C or below, the process temperature of salt bath chromium plating is remarkably reduced, meanwhile, the molten salt flowability is optimized, and the salt bath chromium plating quality is improved. It is ensured that chromium atoms are evenly diffused in the fused salt and chemically react with carbon atoms on the surface of the diamond to generate a uniform and compact chromium carbide layer, and heat damage to the diamond is effectively avoided; the chlorate powder is low in cost, easy to obtain and free of toxicity, harmful substances cannot be generated in the salt bath chromium plating process, the environmental protection property is good, the bottlenecks of high temperature, high consumption and uneven plating of traditional salt bath chromium plating are broken through, a low-cost and high-reliability surface modification technology is provided for the diamond / metal composite material, and the application prospect is wide. And the large-scale application of the diamond in the fields of electronic packaging and thermal management is directly promoted.

This invention discloses a polyolefin adhesive for liquid cooling plates, a heat-bonding film, and a method for preparing the same. The polyolefin adhesive for liquid cooling plates comprises the following raw materials in parts by weight: 40-80 parts of a base resin; 5-40 parts of a tackifying resin; 1-35 parts of a flame retardant; 1-5 parts of a crosslinking agent; and 0.1-0.5 parts of an antioxidant. The base resin is maleic anhydride polyolefin resin, and the crosslinking agent includes aziridine crosslinking agent, or may also include at least one of polycarbodiimide, bisphenol A type epoxy resin, and bisphenol A type phenolic epoxy resin. This invention achieves a reduction in the curing temperature of the adhesive film and improves its performance.

The invention discloses a high-current bus connection terminal and a preparation method thereof, the high-current bus connection terminal comprises a substrate and a silver composite coating, the number of layers of the silver composite coating is 3-10, the thickness of the silver composite coating is 0.5-2mm, and raw materials comprise silver powder and / or composite transition element nanoparticles; the composite transition element nano-particles are palladium / gold nano-particles, and the mass ratio of the composite transition element nano-particles is in an equal difference increasing trend from the inner layer to the outer layer. According to the invention, the silver composite coating is sprayed on the surface of the base body of the connecting terminal, so that the penetration of sulfide can be effectively prevented, and the approaching of corrosive gases such as H2S and the like is repelled, thereby playing a role in preventing sulfuration corrosion; and the adopted cold spraying process has the advantages of being low in process temperature and small in heat input, workpiece thermal deformation and material structure damage cannot be caused, the material structure components are kept consistent, internal microstructures are arranged in order, and the conductivity and abrasion resistance of the silver layer can be improved.

The application discloses a strontium ferrite / polyether ether ketone composite magnet and a preparation method and application thereof, and belongs to the technical field of permanent magnet materials.The strontium ferrite / polyether ether ketone composite magnet comprises, in mass fraction, near Curie point magnetic field heat-treated strontium ferrite magnetic powder 84-95 parts, polyether ether ketone 5-15 parts, silane coupling agent 0.5-1.5 parts and lubricant 0.3-0.7 parts.The application adopts the above strontium ferrite / polyether ether ketone composite magnet and the preparation method and application thereof, realizes the synergistic improvement of magnetic performance, mechanical strength and heat resistance through intrinsic magnetic domain structure optimization, interface bonding strengthening and high densification structure design, and can meet the application requirements under the working conditions of high temperature, high reliability and high strength.

This invention provides a flexible electronic lead composite interface and its fabrication method suitable for extreme aerospace environments, belonging to the field of electrical device technology. The flexible conductive lead has a mounting hole at its root; it also includes a conductive sleeve corresponding to the mounting hole; screws and lock nuts sequentially fix the elastic compensation component, flexible conductive lead, conductive sleeve, and rigid mounting base; a liquid metal filling layer and an external resin sealing layer are arranged within the confined area and periphery between the root of the flexible conductive lead and the rigid mounting base. This invention offers higher mechanical stability, a more robust conductive interface, less sensitivity to thermal mismatch, better environmental adaptability, and lower processing temperature.

This invention belongs to the field of bioengineering technology, specifically relating to a preparation process for nano-sized water-soluble squalene. The process includes the following steps: S1, corn flour is treated and then mixed with pure water, followed by enzymatic hydrolysis using a compound enzyme to obtain a corn saccharification liquid for later use; S2, *Saccharomyces cerevisiae* GS-A3 is inoculated into a culture medium containing the corn saccharification liquid for fermentation; S3, after centrifugation of the fermentation broth, crude squalene is obtained by supercritical CO2 extraction; S4, after molecular distillation, the product is nano-sized. This invention uses corn as raw material, utilizing abundant starch resources, converting it into glucose through enzymatic hydrolysis, and producing squalene in *Saccharomyces cerevisiae* via the MVA pathway. This invention prepares high-yield, high-purity squalene, and through a special nano-saccharification process, improves the stability of squalene, extends its shelf life during application, and significantly improves its bioavailability. Furthermore, the technology used in this invention meets the requirements of green environmental protection.

The application provides a resourceful treatment method of sodium chloride-containing waste and polyvinyl chloride waste, and belongs to the technical field of waste treatment. The resourceful treatment method comprises the following steps: mixing sodium chloride-containing waste, polyvinyl chloride waste, a promoter and a solid halogen agent, and performing calcination treatment to obtain calcined material; mixing the calcined material with water, and performing solid-liquid separation to obtain liquid material and solid material; the solid material is recovered promoter; and the liquid material is crystallized to obtain recovered sodium chloride. The resourceful treatment method can remove organic pollutants in the sodium chloride-containing waste, effectively fix the chlorine element in the polyvinyl chloride waste, prevent the chlorine element from escaping, and reduce the harm to the environment.