15results about How to "Improve filling ability" patented technology

The invention provides a lithium ion battery and a preparation method and application thereof, the lithium ion battery comprises: a positive pole piece, the positive pole piece comprises a lithium supplement agent, the lithium supplement agent comprises elemental boron; a negative pole piece; the diaphragm is arranged between the positive pole piece and the negative pole piece; and the electrolyte is filled among the positive pole piece, the negative pole piece and the diaphragm. According to the lithium ion battery as well as the preparation method and the application thereof provided by the invention, a relatively high positive electrode lithium supplementing effect can be achieved in various battery systems under the condition that gas production is not deteriorated, and the cycle performance of the lithium ion battery is improved.

The invention relates to the technical field of precision casting of turbine blades, in particular to a ceramic core for a nickel-based superalloy isometric crystal hollow turbine blade and a preparation method of the ceramic core. The ceramic core is prepared by mixing refractory powder and a paraffin-based plasticizer and then sintering the mixture at a high temperature, and the mass ratio of the refractory powder to the paraffin-based plasticizer is (75-85): (15-25); the refractory powder is composed of quartz glass powder, alumina powder and natural crystalline flake graphite, and the mass ratio of the quartz glass powder to the alumina powder to the natural crystalline flake graphite is (72-77): (20-25): (0.5-3); the paraffin-based plasticizer is prepared from refined paraffin, beewax and low-density polyethylene, and the mass ratio of the refined paraffin to the beewax to the low-density polyethylene is (40-50): (40-50): (5-10). The natural flake graphite is creatively added into the raw materials of the ceramic core, so that the flowability of slurry is improved, the high-temperature bending strength of the ceramic core is improved, and the depoling performance of the mold core is improved.

The invention particularly relates to a graphite-mold shell composite mold for casting a reactor core of a heat pipe reactor. The graphite-mold shell composite mold comprises an yttrium oxide surface layer mold shell, an upper graphite mold, a graphite rod, a middle graphite mold and a lower graphite mold, the yttrium oxide surface layer mold shell is inserted into the step-shaped through hole in the center of the graphite lower mold from bottom to top, and the outer surface of the yttrium oxide surface layer mold shell is connected with the step-shaped through hole in the center of the graphite lower mold in an attached mode; the graphite middle die is sleeved in an outer annular straight opening at the upper part of the graphite lower die from top to bottom to realize positioning; a graphite rod is inserted into a blind hole in the upper part of the graphite lower die from top to bottom for fixation; the graphite upper die is spliced and fixed at the top of the graphite middle die through a straight opening from top to bottom; and the bottom surface of the graphite upper die is pressed on the upper surface of the graphite rod. The invention further relates to a preparation method of the graphite-mold shell composite mold for casting the reactor core of the heat pipe reactor. According to the invention, sequential solidification of uranium-molybdenum alloy solution in the casting process of the reactor core of the heat pipe reactor is realized, and the exhaust capacity and the mold filling capacity of a dead angle position are improved.

The invention discloses a liquid die forging method for a large thin-wall aluminum alloy box. The liquid die forging method comprises the following steps that S1, a die is closed; s2, molten metal is poured; s3, pressurizing and mold filling are conducted, specifically, a pressure head is started, and meanwhile molten metal in all pressure chambers is pushed to rapidly enter a box part mold cavity to fill the box part mold cavity; s4, pressurizing, solidifying and feeding; s5, the male die retreats to the set position and is separated from the box part, the blank pressing die retreats to the set position, and the workpiece is ejected out; and S6, after the workpiece is cooled to the room temperature, a material cake and an overflow discharging system at the bottom of the box body are removed, and a large thin-wall aluminum alloy box body part blank can be obtained. Large thin-wall box parts can be produced, the molten metal filling distance is remarkably shortened, the mold filling capacity is remarkably improved, and complete forming can be achieved even if the wall thickness is very small.

The present application relates to the technical field of alloy casting, in particular to a preparation method of high-temperature-resistant Ni3Al-based alloy complex thin-wall structure casting. The preparation method of high-temperature-resistant Ni3Al-based alloy complex thin-wall structure casting comprises the following steps: pouring Ni3Al-based alloy liquid into a mold shell, and then performing sectional solidification after pouring is completed; the sectional solidification comprises the following steps: the solidification rate is 5-8 DEG C / min from the pouring temperature to the solidus temperature of the alloy, and the solidification rate is 20-30 DEG C / min from the solidus temperature of the alloy to 1000 DEG C; and the temperature of the mold shell is 950-1050 DEG C during pouring. The preparation method not only improves the filling capacity of the thin-wall structure casting, but also significantly reduces the casting stress of the casting during the solidification process, so that the generation of cracks in the casting is avoided; meanwhile, the high-temperature mechanical properties of the prepared Ni3Al-based alloy complex thin-wall structure casting are improved, and the performance of the casting body can reach the performance level of a single-cast test bar.

The invention relates to the technical field of aviation aircraft engine part manufacturing, in particular to an aircraft engine stator blade forming manufacturing method which comprises the following steps of S1, pretreatment, S2, upsetting treatment, S3, primary defect treatment, S4, die forging treatment, S5, secondary defect treatment and S6, solid solution aging treatment. After the upsetting and die forging forming method is adopted, the mold filling property of the blade becomes good, the structure is uniform, and the production efficiency is high.

The present invention relates to the field of PCB technology, and discloses a stepped circuit board and its manufacturing method and double-layer tape. The manufacturing method comprises: pasting a double-layer tape on the target area of ​​a designated core board; the designated core board is a core board located at the bottom of the step groove to be manufactured, and the target area is located in the orthographic projection area of ​​the step groove and is smaller than the orthographic projection area by a preset size on one side; the double-layer tape comprises a first PI layer, a first adhesive layer, a second PI layer and a second adhesive layer stacked in sequence from top to bottom, and the first adhesive layer has a greater adhesive strength than the second adhesive layer; the double-layer tape is pressed at high temperature to make the first adhesive layer melt and flow to seal the outer edges of the second PI layer and the second adhesive layer; the designated core board is pressed with other core boards to form a multi-layer board by using an adhesive sheet; after controlled depth milling, the cover is opened and the double-layer tape is removed. The present invention can effectively avoid the risks of glue overflow, liquid medicine infiltration and tape falling off, and greatly reduce the difficulty of removing the tape.

The utility model relates to the field of evanescent mode casting, in particular to a double-liquid double-metal hammerhead preparation mold based on evanescent mode casting. The preparation mold comprises a hammer head model, the hammer head model comprises a riser, a hammer head part, a hammer handle part and a temperature measurement pouring gate, the riser, the hammer head part and the hammer handle part are sequentially connected from top to bottom, the temperature measurement pouring gate is located on one side of the riser, and the bottom end of the temperature measurement pouring gate is connected with the hammer handle part and is close to the joint of the hammer handle part and the hammer head part; the casting sand box is provided with a cavity matched with the hammerhead model; the thermocouple is used for being inserted into the bottom of a cavity where the temperature measuring pouring gate is located; the ultrasonic device is used for being inserted into a cavity where the riser, the hammer handle part and the hammer head part are located; and the lifting device is in transmission connection with the ultrasonic device so as to drive the ultrasonic device to move in the vertical direction. By means of the manufacturing mold, the problem that casting defects exist when a double-liquid double-metal hammer is cast in an existing casting technology is solved, and the production cost is reduced.

The invention relates to a semi-solid alloying method for preparing a metal alloy material. The method comprises the following steps: firstly, obtaining a solid-liquid coexistence temperature interval suitable for treatment based on a phase diagram and thermodynamics calculation; then selecting metal raw materials forming the target component, and assembling the metal raw materials into an original blank with a close contact interface; and in the semi-solid temperature interval, a heat-force coupling process is adopted, a solid-liquid coexisting semi-solid structure is formed through local liquefaction induced by diffusion / mass transfer, and macroscopic flow mixing and microstructure reconstruction of the material are enhanced under the shear deformation or stirring effect, so that uniform alloying and structure refinement of the target alloy material are achieved. Compared with the prior art, the method has the advantages that uniform alloying and structure refinement of the alloy material can be realized under the condition that the traditional multi-step series connection of smelting, casting, heat treatment, deformation processing and the like is not needed, the alloy material with uniform components, fine matrix structure and uniformly distributed second phase is obtained, the process flow is simplified, and the energy consumption is low.

The invention discloses a parametric modeling method and device for an overflow groove of a die-casting die based on RSM. The method comprises the steps that the optimal die opening direction of the die-casting die is determined; creating reference parameters of the overflow groove; a parting surface of the die-casting die is defined through the edge of the target die casting, and the attachment position of the overflow groove on the parting surface is determined according to the edge shape of the die casting; according to a Latin hypercube design sampling method, the casting quality and the mold filling performance under different overflow groove reference parameter combinations are recorded; an RSM response surface model is constructed according to the reference parameters of the overflow groove and the corresponding casting quality and mold filling performance, and an optimal reference parameter combination of the overflow groove is obtained; a trapezoidal fuzzy number, Box-Cox transformation and an individual condition expectation curve are introduced into the RSM response surface model; and determining the overflow groove according to the optimal overflow groove reference parameter combination, the parting surface and the attachment position. According to the method, the efficiency of parameter driving design of the overflow groove is improved, so that the working efficiency of die-casting die designers is improved.

The application provides a high-casting-performance beryllium aluminum alloy and a preparation method thereof, and belongs to the technical field of alloy materials.The preparation method comprises the following steps: preparing materials according to the weight percentages of Be ingots, Al ingots, Ag ingots, Co sheets, Si and La metals; placing the Ag ingots, the Co sheets, the Si and the La metals at the bottom of a crucible, then sequentially placing the Al ingots and the beryllium ingots into the crucible, refining, and obtaining a melt; uniformly stirring the melt, then gradually cooling the melt to a pouring temperature, then pouring the melt into a prefabricated ceramic mold shell, and standing for 3-5 minutes in a furnace and cooling outside the furnace.The beryllium aluminum alloy has a uniform and dense structure, good fluidity, high casting performance, and is easy to be cast into a shape, and has fewer casting defects.

The application discloses a magnesium alloy melt self-moving quantitative pouring method, which realizes die casting forming by pouring the smelted magnesium alloy melt into a die casting machine, characterized in that the smelted magnesium alloy melt is first introduced into a first containing body at a first fixed point to realize metering and obtain a fixed volume of magnesium alloy melt; then the metered magnesium alloy melt is transferred to a second containing body, the second containing body is kept closed, ultrasonic vibration is applied to the magnesium alloy melt in the second containing body, and the second containing body is moved to a second fixed point; and the magnesium alloy melt in the second containing body is introduced into the die casting machine at the second fixed point to realize die casting forming. The application can realize rapid pouring with accurate metering, reduce product defects, improve production efficiency, and is particularly suitable for laboratory magnesium alloy test pieces and small-scale trial production of enterprises.

The invention provides a bottom pouring type magnesium alloy casting mold with an extrusion throttling function. A supporting plate is arranged at the bottom of an upper mold, a throttling valve is arranged in the supporting plate, a spring is arranged between the throttling valve and the supporting plate, an extrusion sliding block is arranged on the upper portion of the upper mold, a flow guide channel is formed in the middle of a lower mold, and the flow guide channel and the throttling valve are oppositely arranged; six forming holes are distributed in the outer side of the flow guide channel in the radial direction, and the bottoms of the forming holes communicate with the bottom of the flow guide channel through a bottom injection channel; in the casting process, under the action of extrusion force, the liquidity of magnesium alloy liquid is greatly improved, the mold filling capacity of magnesium alloy is enhanced, and an obtained sample is free of oxidation and cold shut phenomena; the magnesium alloy liquid is subjected to extrusion force and shear force at the throttling holes, so that a magnesium alloy sample with fine grains can be obtained, and the casting cost and the rejection rate are greatly reduced; and the whole casting process can be completed by only 1-2 persons, so that the production efficiency is greatly improved.

The invention relates to the technical field of casting, and provides an extrusion casting and tailor-welding integrated forming method and mold. The extrusion casting and tailor-welding integrated forming method comprises the steps that a tailor-welding joint area of a to-be-cast part is determined, and a transition part is manufactured; the transition parts are placed in the die, and a cavity of the die is divided into a plurality of sub-cavities through the transition parts; the multiple sub-cavities are filled with molten metal, sub-parts are formed through mold filling, and the outer surfaces of the sub-parts and the outer surfaces of the transition parts are melted and connected to form welding seams; and demolding the part, and reinforcing and welding along a welding seam. According to the extrusion casting and tailor-welding integrated forming method, the multiple sub-cavities are filled with liquid at the same time, so that the situation that the flow path of molten metal is too long can be avoided, regular welding seams can be formed between the sub-parts and the transition parts, then disordered joint before flowing of the molten metal is avoided, and meanwhile the joint strength and plasticity can be improved through welding of the welding seams.

This invention discloses a near-net-shape forming mold and forming method for complex thin-walled magnesium alloy components with multiple inner ring ribs. The mold includes an upper mold and a lower mold. A punch pad is provided at the bottom of the upper mold, and a punch sleeve is provided at the bottom of the punch pad. The side of the punch sleeve is detachably connected to the upper mold via screw C. A lower pad is provided at the top of the lower mold, and an ejector rod is inserted inside the lower mold. A die pad block is provided at the top of the lower pad. The forming method includes the following steps: magnesium alloy ingot preparation, double-stage homogenization treatment, extrusion billet preparation, homogenized casting for large plastic deformation to obtain a hollow deformed billet with fine and uniform microstructure, and near-net-shape forming of the thin-walled component with multiple inner ring ribs. This invention can achieve one-pass integrated forming of thin-walled cabin components with complex structures such as multiple inner ring ribs and internal bosses. The prepared magnesium alloy cabin components have stable performance and low anisotropy.