10results about How to "Reduce molding pressure" patented technology

The invention relates to the technical field of carbon materials, in particular to a forming method of petroleum coke powder coke and formed coke. The invention provides a forming method of petroleum coke powder coke, which comprises the following steps: screening powder coke, and screening petroleum coke to obtain powder coke; preparing a mixture, namely adding an asphalt binder, a non-asphalt binder and water containing a surfactant into the coke breeze to obtain the mixture; pressing the mixture, namely pressing the mixture on a forming machine to obtain a formed coke green block; and calcining the formed coke block, namely calcining the formed coke green block to obtain the formed coke. By implementing the technical scheme disclosed by the invention, moisture-containing coke breeze can be directly treated, and the coke breeze does not need to be dried; the forming pressure is low, and the equipment requirement is low; the binder and formed coke are low in impurity content; the mixing and forming processes are carried out at normal temperature, heating is not needed, the process is simple, and energy consumption is low; the prepared formed coke green block is high in strength, and the calcined formed coke is high in strength and low in ash content.

The invention relates to a preparation method of a high-temperature oxidation-resistant silicide coating containing a composite diffusion-resistant layer, the high-temperature oxidation-resistant silicide coating comprises a MoSi2 outer layer, a WSi2-YSZ diffusion-resistant layer and a thin NbSi2 and Nb5Si3 mutual diffusion layer between the WSi2-YSZ diffusion-resistant layer and a substrate, the outer layer provides good high-temperature oxidation resistance for the coating, the diffusion-resistant layer can effectively slow down element mutual diffusion between the coating and the substrate, and the high-temperature oxidation-resistant silicide coating has good oxidation resistance. The loss of the beneficial element Si is reduced, metallurgical bonding is formed between the mutual diffusion layer and the matrix, and the interface bonding between the external coating and the matrix can be improved. According to the method, a YSZ resistance diffusion layer sample containing WSi 2-20% is subjected to constant-temperature oxidation at the temperature of 1400 DEG C for 100 h, and then the oxidation weight of the sample is increased by 1.5 mg / cm < 2 >; meanwhile, compared with an unimpeded diffusion layer sintering sample, the thickness of an oxidation film and the thickness of a diffusion layer are reduced by 28.5% and 29.2% respectively after oxidation is conducted for 100 h, the oxidation film does not peel off, and the coating is well combined with a matrix alloy interface.

The application discloses a low-pressure forming high-frequency low-loss SMC magnetic powder core and a preparation method and application thereof, wherein amorphous iron-based alloy fine powder is added into iron-silicon-chromium coarse powder, different contents of nano calcium carbonate are added into the compounded magnetic powder, and then high-content epoxy resin is melted and mixed in a mixing mill to obtain a high-fluidity mixing material.After crushing, a low-pressure forming high-frequency low-loss SMC granular material is obtained, which is formed by hot pressing under low pressure, and the obtained annular magnetic powder core is annealed in a vacuum oven, so that the low-pressure high-frequency low-loss SMC magnetic powder core is obtained.Through the method, the SMC magnetic powder core with a forming pressure less than 50 MPa and a magnetic loss less than 2100 kW / m 3 under the conditions of 20 mT and 2 MHz can be obtained.

The utility model provides a conductive structure, aggregate and inductance element, the conductive structure includes at least one conductive main body, the conductive main body includes a first conductive portion, a connecting portion and a second conductive portion, the connecting portion has a first surface and a second surface opposite to each other, the first surface is connected with the middle of the first conductive portion, and the second surface is connected with the middle of the second conductive portion. The second surface is connected with the middle part of the second conductive part, and the conductive main body is in axial symmetry along the central line direction of the connecting part. According to the utility model, the inductor element size is reduced, the forming qualified rate in the preparation process is improved, and batch production is realized.

The utility model relates to an adjustable lower die assembly for machining an arc-shaped plate, and belongs to the technical field of arc-shaped plate production. Comprising a bottom frame plate, a left steel plate supporting seat and a right steel plate supporting seat, the left steel plate supporting seat and the right steel plate supporting seat are oppositely arranged, the left steel plate supporting seat is adjustably installed on the upper surface of one side of the bottom frame plate, and the right steel plate supporting seat is adjustably installed on the upper surface of the other side of the bottom frame plate; the distance between the left steel plate supporting seat and the right steel plate supporting seat can be adjusted, and a plurality of sets of top equal-height connecting blocks A connected with a left extrusion round roller are arranged on the upper portion of the left steel plate supporting seat at intervals in the length direction of the left steel plate supporting seat. A plurality of sets of top equal-height connecting blocks B connected with the right extrusion round roller are arranged on the upper portion of the right steel plate supporting base at intervals in the length direction of the right steel plate supporting base. The utility model has the following beneficial effects: the left side extrusion round roller and the right side extrusion round roller form a pair of round rollers with adjustable spacing, and arc-shaped plates with different diameters can be produced by adjusting the spacing.

The utility model belongs to the technical field of nuclear fuel pellet preparation, and particularly relates to a diamond composite punch assembly. Comprising an upper punch, a female die and a lower punch, the female die is of a columnar structure with a hollow structure, an upper punch and a lower punch are arranged at the two ends of the hollow structure of the female die respectively, and a fuel pellet blank is clamped between the upper punch and the lower punch. The fuel pellet forming mold has the beneficial effects that the forming pressure and the demolding pressure of a fuel pellet are lower. And the forming work of the fuel pellet can be completed at lower power consumption. The forming temperature is low, and due to the fact that the diamond has smaller friction force, less heat is generated in the fuel pellet forming process. And the condition of material surface oxidation caused by high temperature is avoided. And the service life is long, and diamond has higher strength, hardness and wear resistance. And the service life is longer. And therefore, the economic use cost is lower.

The invention relates to a Ti5Si3 / ZrB2 composite material which comprises Ti5Si3 intermetallic compound powder, and a Ti5Si3 intermetallic compound is used as a reinforcing and toughening phase; zrB2 is used as a matrix of the ZrB2 powder; al2O3 powder and Y2O3 powder are added as sintering aids; adding fine silicon powder as a sintering aid; the hot pressing sintering method comprises the following steps: preparing Ti-Si intermetallic compound powder by adopting a mechanical alloying process; the Ti-Si intermetallic compound powder prepared in the first step is subjected to heat treatment to prepare Ti5Si3 powder, and the Ti5Si3 powder and ZrB2 powder are mixed; the preparation method comprises the following steps: preparing Ti5Si3 / ZrB2 composite powder; preparing a compact Ti5Si3 / ZrB2 composite powder prefabricated blank through a pressure forming process; a Ti5Si3 / ZrB2 composite material is prepared through a hot pressed sintering process; the hot pressing sintering method has the advantages that the preparation efficiency is high, the preparation process is simple, the Ti5Si3 / ZrB2 composite material product can be rapidly sintered and manufactured, and the prepared Ti5Si3 / ZrB2 composite material has high density and high mechanical property.

The utility model relates to equipment for machining an arc-shaped plate, and belongs to the technical field of arc-shaped plate production. The lower die comprises a left steel plate supporting seat, a right steel plate supporting seat and a middle supporting seat, the left steel plate supporting seat and the right steel plate supporting seat are oppositely arranged, the middle supporting seat is located between the left steel plate supporting seat and the right steel plate supporting seat, and the length direction of the left steel plate supporting seat, the length direction of the right steel plate supporting seat and the length direction of the middle supporting seat are consistent with the length direction of the arc-shaped stamping male die. A plurality of sets of top equal-height connecting blocks A connected with the left extrusion round roller are arranged on the upper portion of the left steel plate supporting seat at intervals in the length direction of the left steel plate supporting seat, and a plurality of sets of top equal-height connecting blocks B connected with the right extrusion round roller are arranged on the upper portion of the right steel plate supporting seat at intervals in the length direction of the right steel plate supporting seat. The forming die has the beneficial effects that the arc-shaped stamping male die presses a steel plate downwards and is matched with the left side extrusion round roller and the right side extrusion round roller of the lower die, so that the steel plate on the lower die is bent into an arc-shaped plate, and the forming efficiency is improved.

The utility model discloses a terminal cold heading forming module, which relates to the technical field of dies, and comprises a first die, the first die comprises a first main die and a first punching die, the first main die is provided with a pre-forming die cavity with an opening facing the first punching die, and the size of one end, close to the opening, of the pre-forming die cavity is gradually enlarged towards the opening direction. The end, close to the opening of the pre-forming die cavity, of the pre-forming die cavity is arranged to be of a structure with the size gradually increased in the direction of the opening, a space for outward deformation is provided for one end of a workpiece material, and therefore the pre-forming structure with the structure gradually expanded outwards is formed under the stamping action of the first stamping die; therefore, the material of the structure is uniformly distributed, the subsequent flange plate structure forming step is more regular, the material deviation condition is reduced or even avoided, the blank raw material consumption is reduced, the material utilization rate of the terminal cold heading process is improved, and the material cost is reduced.

Provided in the present application are a power inductor and a preparation method therefor. The preparation method comprises the process steps of slurry preparation, slurry casting, coil winding, coil arrangement, slurry pouring, warm-water pressing, curing treatment, UV adhesive film lamination, cutting, etc. A small-size power inductor can be simply and efficiently prepared, the preparation method is particularly suitable for ultrathin inductors, the phenomena of a short circuit, an open circuit, etc., appearing due to the damage to copper wires that is caused by using dry-pressing integral forming technology are avoided, and the problem of a single box body being easily damaged during casting is solved, thereby facilitating industrial applications.