15 results about "Conventional casting" patented technology

The invention discloses a high-thermal-conductivity Mg-Zn magnesium alloy suitable for rheoforming and a preparation and processing method of the high-thermal-conductivity Mg-Zn magnesium alloy. The alloy comprises the following components in percentage by weight: 1-8% of Zn, 0.5-5% of Cu, 0.2-2% of Sn, 0.2-1% of Sc and the balance of Mg and inevitable impurities. The preparation and processing method comprises the following steps: (1) preparing raw materials according to the composition of the alloy components, and smelting by adopting a medium-frequency induction furnace and taking mixed gas of tetrafluoroethane and argon as a protective atmosphere; (2) mechanical stirring and ultrasonic synergistic stirring are combined to form a uniform melt; (3) preparing semi-solid slurry with a solid phase ratio of 35-50%; (4) forming; (5) cooling and opening the mold; (6) the obtained rheoforming blank is heated to 340-430 DEG C, heat preservation is conducted for 2-12 h, and after heat preservation is finished, quenching is conducted immediately, and cooling is conducted to the room temperature; (7) pre-aging; and (8) aging. By reasonably designing alloy components and optimizing rheoforming parameters, the defects of shrinkage, hot cracking and segregation of a conventional cast Mg-Zn alloy are overcome, and meanwhile, high heat conductivity and mechanical properties are guaranteed.

The utility model relates to the technical field of differential mechanisms, in particular to a differential mechanism assembly which comprises an upper shell, a lower shell, a main reduction gear, a pin shaft, a pin shaft check ring and a transmission component. The end part of the pin shaft is riveted with the pin shaft check ring, so that the axial movement of the pin shaft can be prevented; the upper shell body and the lower shell body are formed in a stamping mode and then are machined, a conventional differential shell body is formed in a casting mode, the upper differential shell body and the lower differential shell body are stamping parts and are lighter than the conventional casting differential shell body, and the stamping production cycle of the upper differential shell body and the lower differential shell body is shorter than the casting production cycle of the conventional casting differential shell body. The machining period of the upper differential shell and the lower differential shell after stamping is shorter than the machining time of a conventional casting differential shell; the stamping production line has a smaller production site than a casting production line.

This invention proposes a method to improve the grain size uniformity of GH2026 bars. The method employs vacuum induction + low-temperature casting electrode + electroslag remelting. In the vacuum induction stage, the alloy composition is precisely controlled, with the Ti / Al ratio limited to 10–12 to reduce the risk of uneven γ′ phase precipitation. Trace amounts of B and Zr are added to refine grain boundaries and inhibit solute segregation. In the electroslag remelting stage, a CaF2-Al2O3-CaO slag system is used to reduce the content of harmful elements and alleviate macroscopic segregation. The casting process uses a lower-than-conventional casting temperature of 1420–1450℃ to avoid excessive dendrite growth, break up nascent dendrite arms, and promote uniform diffusion of solute elements. Two homogenization annealing processes are performed before and after forging to further improve dendrite segregation, resulting in GH2026 bars with a grain size of grade 9, significantly improving their service performance for fasteners.

The invention relates to a high-silicon aluminum alloy coating and a preparation method and application thereof. The high-silicon aluminum alloy coating has a pseudo-eutectic structure. The pseudo eutectic structure comprises a characteristic-free area; and the size of the Si phase in the non-characteristic area is 20-80 nm. According to the Hall-etch effect, the strengthening effect of a Si strengthening phase is fully exerted by a nanoscale refined and dispersively distributed Si phase in the high-silicon aluminum alloy coating, the situation that a base body is cut by a thick Si phase of a conventional cast aluminum-silicon alloy and cracks are generated is avoided, and the mechanical property of the high-silicon aluminum alloy coating is fully strengthened. The high-silicon aluminum alloy coating is good in high-temperature stability and excellent in service mechanical property at the temperature of 300 DEG C, and compared with the room temperature, the room temperature is not obviously reduced.

The application discloses a kind of copper-aluminum composite strip continuous casting and rolling preparation methods of ultrasonic vibration assisted reinforcement, it is related to metal laminated composite material preparation technical field, including preheating treatment to copper strip and control liquidus temperature;The copper strip after preheating is introduced with liquidus into the casting and rolling crystallization area formed by casting and rolling roll and carries out solid-liquid casting and rolling composite;The composite strip obtained after casting and rolling is carried out hierarchical cooling;The composite strip after cooling is sequentially carried out cold rolling finishing and low-temperature stress relief annealing.The application fundamentally eliminates interface pore inclusion and oxide residue, solves the technical problem of large dispersion of bonding strength in conventional casting and rolling process;Grain refinement strengthening and interface structure optimization synergistically improve the interface mechanical properties;Effectively release the interface thermal stress generated by the difference of copper-aluminum thermal expansion coefficient, avoid interface cracking during cooling process;Bonding strength consistency is high, can meet the stringent requirements of new energy automobile battery connecting piece and other high reliability application fields.

The present disclosure relates to a manufacturing method of pore-free dense solid-state electrolyte layers for rechargeable solid-state batteries. Using conventional casting methods used in the field of rechargeable batteries, solid-electrolyte-precursor materials are coated on electrodes. In order to manufacture the dense solid-state electrolyte layers, an electron beam is employed to electro-magnetically scan the coated precursor materials with a high speed. The intense electron beam rapidly increases temperatures of the materials with a fast-scanning rate and makes uniform melting of the precursor materials. In this way, the dense solid-state electrolyte layers are manufactured while minimizing thermal damages of electrodes.

This invention belongs to the field of aluminum alloy hot working and heat treatment technology, specifically disclosing a heat-resistant Al-Cu-Mg-Mn aluminum alloy, its preparation method, and its applications. The aluminum alloy composition of this invention includes Cu, Mg, Mn, Zn, Cr, Zr, and Ti, with the balance being Al, targeting medium-temperature load-bearing applications at 250–300℃. The process of this invention does not rely on adding high-cost elements or rapid solidification and additive manufacturing as the main technical route. Instead, it introduces a pre-forging process after the alloy casting billet is completed and before homogenization treatment. This process breaks down and reconstructs the continuous coarse second-phase skeleton in the casting state, forming dislocations, subgrain boundaries, and local high-strain zones in the matrix. Subsequently, through graded homogenization, hot extrusion, two-stage solution treatment, and artificial aging, high-density, fine, and uniform precipitation of the T-phase is induced. This method can be integrated with conventional casting, forging, extrusion, and heat treatment equipment, and is suitable for medium-temperature heat-resistant load-bearing components in aerospace and transportation equipment.

This invention discloses a rare earth-containing aluminum alloy refining agent and its application method. The aluminum alloy refining agent is composed of aluminum powder, titanium powder, carbon powder, copper oxide powder and yttrium oxide powder, and the molar ratio of aluminum, titanium, carbon, copper oxide and yttrium oxide is (2.0~6.0):(0.5~1.5):(0.5~1.5):(0.2~1.5):(0.01~0.2). The application method includes: step (1) ball milling and mixing aluminum powder, titanium powder, carbon powder, copper oxide powder and yttrium oxide powder to obtain mixed raw material powder; step (2) pressing the mixed raw material powder into shape and drying to obtain aluminum alloy refining agent block; step (3) pressing the dried aluminum alloy refining agent block into aluminum alloy melt for high-temperature self-propagating reaction; step (4) casting using near liquidus temperature casting method to obtain aluminum alloy ingot with significantly refined grain structure. This invention can achieve a fine and uniform equiaxed crystal structure comparable to that of rapid solidification under conventional casting conditions. In-situ particles can also serve as reinforcing phases, playing a role in dispersion strengthening.

The invention provides an instant edible packaging film as well as a preparation method and application thereof. The instant edible packaging film comprises the following components in parts by weight: 2-4 parts of gelatin, 1-2 parts of kappa-type carrageenan, 1-2 parts of a thickening agent, 0.5-1.5 parts of a water repellent agent, 0-0.2 part of calcium chloride, 1-1.5 parts of a composite plasticizer and 100 parts of water. The protein gelatin is used as a film forming body, good mechanical performance and heat sealing performance are provided, the added polysaccharide carrageenan and protein molecules can form a composite network structure through hydrogen bonds, hydrophobic bonds, electrostatic interaction, ionic bonds and the like, and the processing and using requirements are met. The stearate substance is used as a surfactant and a water repellent agent, so that the hygroscopicity of the packaging film can be adjusted, the moisture permeation of the inner packaged food can be delayed, the interface stability and uniform dispersion of the system can be promoted after the stearate substance is dissolved, and layering or particle sedimentation can be prevented; and the industrial production can be realized only by adopting a conventional tape casting process. The functional edible packaging film has moisture resistance, heat sealability and system stability after dissolution at the same time.

The application belongs to the technical field of metal materials, and specifically discloses a high-strength and high-toughness cast aluminum alloy and a preparation method thereof; the aluminum alloy contains the following elements and has the following mass percentages: 6.80%-7.10% of Si, 0.28%-0.32% of Mg, 0.10%-0.20% of Ti, 0.005%-0.015% of B, 0.010%-0.020% of Sr, 0.003%-0.012% of La, ≤0.15% of Fe, ≤0.15% of Cu, ≤0.05% of the rest of impurities, ≤0.15% of the total of the rest of impurities, and the rest is Al; the preparation method uses A356.2 aluminum alloy ingots as a matrix; Al-5Ti-1B-1La alloy is used as a refiner, the A356.2 aluminum alloy ingots are smelted at 720 DEG C, then the Al-5Ti-1B-1La intermediate alloy refiner is added, the Al-10Sr modifier is added after uniform stirring, and the aluminum alloy is poured and formed after heat preservation; the formed aluminum alloy is subjected to solid solution at 540 DEG C for 4 hours, water quenching at 80 DEG C for 120 seconds, and aging treatment at 130 DEG C for 3 hours; the high-strength and high-toughness cast aluminum alloy and the preparation method thereof have higher hardness, ultimate tensile strength and elongation than the existing conventional A356.2 (T6) cast aluminum alloy.

The invention discloses an aluminum alloy refiner containing rare earth and a using method thereof, the aluminum alloy refiner is composed of aluminum powder, titanium powder, carbon powder, copper oxide powder and yttrium oxide powder, and the molar ratio of aluminum to titanium to carbon to copper oxide to yttrium oxide is (2.0-6.0): (0.5-1.5): (0.5-1.5): (0.2-1.5): (0.01-0.2). The use method comprises the following steps: (1) uniformly mixing the aluminum powder, the titanium powder, the carbon powder, the copper oxide powder and the yttrium oxide powder through ball milling to obtain mixed raw material powder; (2) the mixed raw material powder is subjected to compression molding and drying, and an aluminum alloy refiner block is obtained; (3) the dried aluminum alloy refiner block is pressed into an aluminum alloy melt for a high-temperature self-propagating reaction; and (4) a near liquidus temperature casting method is adopted for casting, and the aluminum alloy cast ingot with the obviously refined grain structure is obtained. According to the method, a fine and uniform equiaxed crystal structure comparable to a rapid solidification structure can be obtained under the conventional casting condition, and in-situ particles can also serve as a reinforcing phase to achieve the dispersion strengthening effect.

The application belongs to the technical field of aluminum alloy production, and particularly discloses a method for producing 8006 high-strength and high-toughness single-zero aluminum foil by continuous casting and rolling in a low-carbon and environment-friendly manner, which comprises the following steps: producing 8006 alloy cast blank by the continuous casting method, producing 1.5mm-thick blank by three continuous rolling, producing high-strength and high-toughness single-zero aluminum foil by reducing the thickness of the blank, optimizing the intermediate annealing process and reducing the cold foil rolling production pass, realizing low-carbon short-flow production, reducing the intermediate annealing temperature by optimizing the intermediate annealing process, avoiding the problem of coarse grains caused by abnormal grain growth of the Mn element in the blank during recrystallization, avoiding the material rejection caused by the influence of the mechanical properties of the finished product due to the coarse grain problem, in addition, the intermediate annealing process of the present application can realize the production of finished products only by one intermediate annealing, and the 8006 alloy aluminum foil product produced by the conventional casting and rolling blank reduces one intermediate annealing, and the production cost is reduced by about 200 yuan / ton.

This invention relates to a method and system for selecting vibration parameters of a high-speed continuous casting mold, including determining the starting casting speed, the target casting speed range, and selecting the negative slip time t within the target casting speed range. N Range; determined by negative slip time t N The range yielded the frequency-negative slip-time curves (f-t) under different tension speeds and amplitudes. N Curve, passing through the starting acceleration t N and t N The method involves projecting a certain value onto a horizontal plane to obtain the amplitude and frequency range that meet the conditions. A series of processing and operations are then performed to obtain the amplitude and frequency that meet the conditions. Through this invention, the casting speed of slabs, square billets, round billets, and irregularly shaped billets can be increased by 10% to 200%, significantly improving production efficiency and ensuring the good operation of the hydraulic vibration equipment in the crystallizer. Furthermore, the surface and internal quality of the cast billet are comparable to that under conventional casting speed conditions, and the product quality meets customer requirements.

The application relates to a method for preparing closed-cell foam steel by a laser additive manufacturing technology and belongs to the field of additive manufacturing forming technology. The method comprises the following steps: fully mixing steel powder and Cr2N powder to obtain mixed powder; taking the mixed powder as raw material, selecting laser processing parameters and scanning tracks according to size requirements, inputting into a corresponding laser processing operation system, obtaining two-dimensional information, carrying out laser additive manufacturing, and obtaining the closed-cell foam steel. The application develops a new laser preparation method of closed-cell foam steel, realizes the preparation of the closed-cell foam steel by using the program setting of a laser and the scanning of a laser beam, the aperture of the closed-cell foam steel is generally less than 500 mu m, the harm problem of residues caused by conventional casting foam steel and sintering method for manufacturing foam steel is avoided, meanwhile, the design is more free, the environment is harmless, the limitation of a mold is broken, and the flexibility and flexibility of the manufactured closed-cell foam steel are greatly increased.

The utility model relates to the technical field of casting molds, and discloses a precision casting mold for bearing castings, which solves the problems of poor use safety and poor casting tightness of the conventional casting mold, and comprises a support frame, a casting lower mold is fixedly arranged at the bottom end in the support frame, and a casting cavity is formed in the top end of the casting lower mold. A first hydraulic rod is fixedly arranged in the middle of the top end in the supporting frame, a combined casting upper die is fixedly arranged at the bottom end of the first hydraulic rod, and the combined casting upper die is composed of an upper die plate, a die-casting liquid inlet pipe, a material receiving hopper, a second hydraulic rod, a pressure plunger spraying overflow pipe and an overflow anti-sputtering material receiving box. The jet overflow pipe is positioned in the overflow anti-sputtering material receiving box; through the casting mold, the casting quality and the safety in the casting process can be improved.