21results about How to "Good formability" patented technology

This invention discloses a retractable multi-material 3D printing head, which includes an extrusion structure, a first feeding structure, a second feeding structure, and a third feeding structure. By connecting the three feeding structures with one extrusion structure, the extrusion retraction problem in 3D printing of multiple materials is solved. The extrusion structure has three meshing screws, resulting in high mixing efficiency during slurry mixing. Simultaneously, each of the three feeding structures has a screw, allowing for better control of the amount of high-viscosity material added to the extrusion structure. Furthermore, the three screws inside the extrusion structure are specially designed irregular-shaped screws. While achieving conventional mixing, they not only better control the material extrusion amount but also work together with the screws in the feeding structures to achieve slurry retraction when printing high-viscosity materials, improving the forming effect and allowing for a wider solid content range in the formed ceramic slurry.

A nonaqueous electrolyte secondary battery includes a first separator, a positive electrode plate, a second separator, and a negative electrode plate, which are overlapped and wound 10 turns or more to form an electrode body. The electrode body has a flat portion in which an outer peripheral surface is flat, and two curved surface portions in which the outer peripheral surfaces are curved, which are arranged at both ends in a first direction of the flat portion. The nonaqueous electrolyte secondary battery includes a winding end tape attached to an outermost peripheral surface of the electrode body, and a positive electrode protection tape adhered to a winding start side end portion on an inner peripheral side of the positive electrode plate. The winding end tape is arranged at one of the two curved surface portions, and the positive electrode protection tape is arranged along the curved surface of the winding start side end portion of the positive electrode plate on one or the other curved surface portion.

The application discloses a high-surface-quality 980MPa-grade hot-dip galvanizing DH steel and a preparation method thereof. The main chemical component mass content of the hot-dip galvanizing DH steel is as follows: C: 0.17-0.21%, Si: 0.4-0.7%, Mn: 1.8-2.2%, Nb: 0.01-0.02%, Ti: 0.01-0.02%, Cr: 0.4-0.5%, and Als: 0.14-0.9%. The method adopts low-carbon design and high-dew-point annealing process to produce the hot-dip galvanizing steel plate which meets the low-carbon environmental protection requirement and has high surface quality, so as to meet the urgent needs of the market. The high-dew-point annealing process is a new type of annealing technology, the oxygen partial pressure is increased by increasing the dew point, the Si and Mn element internal oxidation is realized, and thus the plating leakage defect is effectively improved, and the surface smoothness and flatness of the steel plate are improved.

The present application relates to a polyarylene sulfide resin composition, a molded article, a method for producing a resin composition, and a method for producing a molded article. A PAS resin molded article having excellent wear resistance and moldability, a PAS resin composition capable of providing the same, and methods for producing the same are provided. More specifically, a polyarylene sulfide resin composition for a sliding member, a molded article containing the same, and methods for producing the same, the polyarylene sulfide resin composition for a sliding member being compounded with 0.01 to 1 parts by mass of an organic crystallization promoter having a melting point of 300°C or higher and an average particle diameter of 100 μm or less, relative to 100 parts by mass of a polyarylene sulfide resin having a V6 viscosity at 300°C of 250 to 3000 Pa·s.

The present application belongs to the technical field of steel structure bridge construction, and particularly relates to a petal-shaped double-curved-surface special-shaped steel bridge tower and a manufacturing method thereof. The present application is designed to connect a plurality of tower columns to form a whole, which helps to enhance the stability of the petal-shaped double-curved-surface special-shaped steel bridge tower structure, effectively avoids tilting, deformation and other phenomena under the action of earthquakes, strong winds or traffic loads, and further improves the safety of the bridge. The middle parts of the adjacent tower columns are not connected to each other, which helps to manufacture and install in sections during the construction process, simplifies the construction process, effectively reduces the construction difficulty and improves the construction accuracy, and further improves the construction quality of the petal-shaped double-curved-surface special-shaped steel bridge tower. Compared with the manufacturing and construction of the linear steel bridge tower, the present application has the excellent characteristics of good forming effect, fast assembly speed, less investment in manpower and materials, low production cost, high economic benefit, and further improved production efficiency.

A zinc-based high-strength outer sheet with excellent formability and equipped with a GI or ZM coating, and its manufacturing method, are disclosed. The chemical composition of the steel, by mass percentage, is as follows: C: 0.04%–0.1%, Si: 0.2%–0.5%, Mn: 1.2%–1.8%, P≤0.02%, S≤0.01%, Al: 0.02%–0.05%, Cr≤0.5%, Nb≤0.02%, N≤0.006%, with the balance being Fe and unavoidable impurities. The content of Si, Mn, and Cr satisfies the condition: (Mn+Cr)−2×Si≥0.5%. This method, through optimized composition design and precise control of the annealing-galvanizing process, synergistically solves the core contradiction of achieving high strength, high formability, and high surface quality in high-strength outer sheets. In particular, it effectively inhibits surface oxidation of the substrate, ensuring the uniformity, density, and adhesion of the coating, and can stably produce high-quality outer sheet products suitable for pure zinc (GI) and zinc-aluminum-magnesium (ZM) coatings.

The application discloses a high-strength cold-rolled hot-dip galvanized steel plate with high surface gloss, which comprises a steel base plate, a hot-dip galvanized layer and a transition layer between the steel base plate and the hot-dip galvanized layer, wherein the transition layer comprises zinc-iron intermetallic compounds, the average thickness of the transition layer is 2-30% of the thickness of the hot-dip galvanized layer; the grains in the hot-dip galvanized layer are in an equiaxed crystal morphology, and the average grain size is less than 30% of the thickness of the hot-dip galvanized layer; the steel base plate contains Fe and inevitable impurities, and further contains the following chemical elements with the mass percentage as follows: C: 0.09-0.25%, Mn: 2.3-3.0%, Si: 0.3-2.0%, Cr: 0-0.7%, Nb: 0-0.03%, and Ti: 0-0.03%. Correspondingly, the application further discloses a manufacturing method of the high-strength cold-rolled hot-dip galvanized steel plate, which comprises the following steps: (1) preparing a steel base plate; (2) continuous annealing; and (3) hot-dip galvanizing. The cold-rolled hot-dip galvanized steel plate prepared by the application has excellent performance, and has the advantages of high surface reflectivity, high formability, low cost and the like.

This utility model relates to the technical field of temperature control equipment for pipe forming, and more particularly to a forming device for zoned temperature control of large-diameter thin-walled low-thermal-expansion pipes based on sodium-cooled fast reactors. The device includes: a forming mold, multiple first temperature control units, and multiple second temperature control units. The first and second temperature control units are evenly spaced along the axial direction of the forming mold, and are arranged opposite to each other. The first temperature control units are embedded in the outer wall of the forming mold, and the second temperature control units are embedded in the inner wall of the forming mold. During the forming of the large-diameter thin-walled low-thermal-expansion pipe, the heat generated by the first temperature control units acts on the outer wall area of ​​the large-diameter thin-walled low-thermal-expansion pipe, and the heat generated by the second temperature control units acts on the inner wall area of ​​the large-diameter thin-walled low-thermal-expansion pipe. This utility model, through zoned temperature control of the inner and outer walls, can reduce the temperature difference between the inner and outer surfaces of the large-diameter thin-walled low-thermal-expansion pipe, thereby improving the forming effect of the large-diameter thin-walled low-thermal-expansion pipe.

This invention provides a Gr / Al-Mg2Si-Mg composite powder, its preparation method, alloy components, and end products. The composite powder comprises 6.0%~14.0% Mg, 1.0%~6.0% Si, 0.1%~0.6% Mn, 0.1%~0.2% Ti, 0.28%~0.32% Al-5Ti-B, 1.0%~8.0% Mg2Si, and 0.5%~3% graphene Gr, with the balance being Al. By increasing the Mg content and adding a small amount of Si, the content of the Mg2Si reinforcing phase is increased. Simultaneously, in addition to introducing small amounts of Mn and Ti, graphene Gr is introduced as a reinforcement to significantly improve mechanical properties. Through forming processes such as selective laser melting, alloy components with high yield strength, high tensile strength, and high elongation can be formed, filling the gap in low-cost, high-strength aluminum alloy systems produced by selective laser melting.

The present invention aims to provide a polycarbonate resin and a manufacturing method for a polycarbonate resin molded product, the polycarbonate resin being excellent in light resistance, transparency, color tone, heat resistance, thermal stability, and mechanical strength. The polycarbonate resin of the present invention contains at least a structural unit derived from a dihydroxy compound having a moiety represented by the following general formula (1) as a partial structure, wherein a case where the moiety represented by the general formula (1) is -CH2-O-H is excluded.

The present disclosure relates to the technical field of granulator, and one embodiment of the present disclosure provides a granulator for pesticide water dispersible granules, which comprises a shell, a feeding port is arranged at the top end of the shell, a guide plate is arranged on the inner top wall of the shell, and the granulator further comprises a drying assembly, a cutting seat, a cutting mechanism and a granulating mechanism; the drying assembly is arranged on the shell and is used for drying excessive moisture in the material entering the shell; one end of the cutting seat is fixedly connected with the inner side wall of the shell; the cutting mechanism is arranged in the shell and is used for longitudinally cutting the material; and the granulating mechanism is arranged in the shell and is used for transversely cutting the material. Through the above technical scheme, the technical problem that the material for producing the pesticide water dispersible granules has humidity and may be adhered to the granulating knife when being cut by the two granulating knives, thereby affecting the forming effect of the granules is solved.

This application relates to a clean steel and its preparation method. The clean steel composition includes: C: ≤0.0030%; N ≤0.0020%. Such a pure composition meets the requirements of steel used in high-end fields. The method obtains clean steel through electric furnace smelting of all scrap steel or high scrap ratio steel, ladle refining process, continuous casting, heating, and rolling. It effectively controls the nitrogen and oxygen content in the molten steel, ensuring the high purity of the steel. In particular, at the end of the decarburization treatment of the RH vacuum circulation degassing refining process, a certain amount of methane is mixed into the bottom blowing gas. The methane reacts with the oxygen in the molten steel to generate a large number of CO bubbles, which enhances the stirring of the molten steel, promotes the flotation of inclusions, and improves the cleanliness of the molten steel. At the same time, the CO bubble effect improves the denitrification efficiency of the molten steel. Furthermore, since the methane gas consumes some of the oxygen in the molten steel, the oxygen content of the molten steel is reduced at the end of the decarburization treatment, thereby reducing the amount of aluminum alloy used for deoxidation and further improving the cleanliness of the molten steel.

This invention belongs to the technical field of automotive steel manufacturing, specifically relating to a green, low-carbon high-strength automotive steel and its preparation method. The invention adds nickel-doped modified niobium carbide to the high-strength steel, dispersing it in the iron matrix to effectively improve the strength and toughness of the steel plate and increase its porosity. Simultaneously, the addition of Ca, Mg, and lanthanum and cerium carbonate as composite refining agents to the alloy melt improves casting quality and mechanical properties. Furthermore, precise control of the composition of elements such as C, Mn, Si, Cr, Mo, Cu, and Ti, combined with hot rolling, cold rolling, continuous annealing, or hot-dip galvanizing processes, enables the material to possess both high strength and excellent porosity.

The present application relates to the technical field of cooking utensils, and provides a multi-stage finished product annealing method for cast-rolled 3003 aluminum alloy used in rice cookers and application thereof, which comprises the following steps: after the 3003 aluminum alloy cold-rolled slab is kept at a first annealing temperature of 460-480 DEG C, the slab is kept at a second annealing temperature of 300-340 DEG C. According to the method, after the cold-rolled slab obtained after the cold-rolling process is kept at 460-480 DEG C, the slab is kept at 300-340 DEG C, the high mechanical property and high forming property of the cast-rolled slab are considered by optimizing the finished product annealing process, and the obtained cast-rolled 3003 aluminum alloy finished product is particularly suitable for application in the rice cooker inner container.

The application discloses a high beryllium copper alloy strip based on electric pulse assisted rolling and a preparation method thereof, and belongs to the technical field of precipitation hardening alloy material processing. The preparation method comprises the following steps: S1, after preparing materials according to the mass percentages of various chemical components of the beryllium copper alloy to be prepared, the materials are put into a vacuum induction melting furnace to be vacuum melted into a liquid state, and then the liquid state is poured into a beryllium copper alloy ingot; S2, the beryllium copper alloy ingot is heated to a temperature of 800-850 DEG C, and then hot-rolled after being kept at the temperature for 15-20 hours to obtain a beryllium copper hot-rolled blank; S3, the beryllium copper hot-rolled blank is sequentially subjected to annealing treatment and face milling; S4, the beryllium copper hot-rolled blank after the face milling is sequentially subjected to rough rolling, edge cutting, solid solution treatment and electric pulse rolling to obtain a beryllium copper alloy strip. The beryllium copper alloy prepared by the application has no cracks under a large deformation, has a large degree of grain crushing, has a small grain size, has good formability, and has a short production flow and high production efficiency.

The present application belongs to the technical field of punch forming, and relates to a packaging aluminum pipe punch forming device. The present application comprises a packaging aluminum pipe punch forming device, which comprises a die and a punch. A die cavity that is matched with the punch is formed in the die. A bar magnet is arranged in the punch. A radially magnetized annular magnet is arranged in the die. The axis of the radially magnetized annular magnet coincides with the axis of the die cavity. When the punch is inserted into the die cavity to punch, a radial repulsive force is generated between the radially magnetized annular magnet and the bar magnet, so that the punch is kept at the central position of the die cavity. The strong repulsive force generated by the same polarity of the radially magnetized annular magnet and the bar magnet can keep the punch at the central position, so as to resist the lateral force that causes the bending of the punch, and effectively prevent the bending and deformation of the punch. Therefore, the wall thickness uniformity and straightness of the formed packaging aluminum pipe are ensured.

This invention provides an aluminum alloy composite brazing plate and its preparation method. The composite brazing plate includes a core layer and a brazing layer. The core layer is made of an aluminum-manganese alloy, with a manganese content of 0.5–1.5 wt%. In the alloy microstructure of the core layer, the R-Cube texture area accounts for 10–20%, and the P-texture area accounts for 10–20%. The core layer is in the O state. The brazing layer is made of an aluminum-silicon alloy. The method of this invention regulates the microstructure of the material through homogenization heat treatment, cold rolling, and two-stage annealing during the preparation of the composite brazing plate. This controls the area ratio of R-Cube and P-textures within the material microstructure, resulting in a lower recrystallization activation energy for the composite plate material, improving its corrosion resistance, ensuring its strength while avoiding excessive reduction in elongation, thus giving it good formability.

The utility model provides a kind of inner and outer skin type granulating spray cup for chemical fertilizer production, it is related to granulating spray cup field, including rack, coupling sleeve, spray net component and drive assembly, it is characterized in that, coupling sleeve includes sleeve body and the feed pipe connected in sleeve body lateral wall, sleeve body is provided with upper and lower passage pipe and guide material pipeline, the import of guide material pipeline is communicated with feed pipe;Spray net component is located below coupling sleeve, spray net component is connected with coupling sleeve by gland, spray net component includes inner spray net and outer spray net, both can rotate along opposite direction under the driving of drive assembly;The sleeve of connection inner spray net penetrates upper and lower passage pipe, sleeve is fixed with inner spray net inner wall by fixed disc, fixed disc is also connected with stirring blade;The utility model is disturbed by the turbulence shear of stirring blade through the shear of twice of inner spray net and outer spray net, it is applicable to the processing of thick slurry and dilute slurry, granulating forming rate is high, greatly reduces the return rate, improves production efficiency.

This invention discloses a 780MPa-grade rare-earth high-strength dual-phase steel, its preparation method, and its applications. Belonging to the technical field of rare-earth dual-phase steel, the chemical composition and mass percentage of the 780MPa-grade rare-earth high-strength dual-phase steel are as follows: C: 0.08-0.10%; Si: 0.15-0.25%; Mn: 1.8-2.4%; Als: 0.020-0.055%; Nb: 0.025-0.035%; Ti: 0.015-0.025%; Ce: 0.0026-0.0045%; P: ≤0.012%; S: ≤0.004%; N: ≤0.004%, with the remainder being Fe and unavoidable impurities. In this invention, the proportion of large-angle grain boundaries in the rare-earth high-strength dual-phase steel is 49.4%-56.4%. From the microstructure and crystal orientation results, the rare-earth steel of this invention exhibits better toughness and plastic deformation capacity.

The utility model discloses biomass pellet fuel forming equipment. The biomass pellet fuel forming equipment comprises a forming chamber, a pellet forming mechanism and a planetary gear driving mechanism, a top cover is arranged on the upper side of the forming chamber, and a feeding hopper is fixedly connected to the middle of the top cover; the particle forming mechanism comprises a slewing bearing, a material grinding box, a fixed grinding table, a separation supporting disc and a rotary grinding table, the slewing bearing is fixedly connected to the upper side of the interior of the forming chamber, an inner ring of the slewing bearing is fixedly connected with the material grinding box, and the upper side of the interior of the material grinding box is rotationally connected with the separation supporting disc; uniformly distributed rotary grinding tables are rotatably connected to the middle of the partition supporting disc, a fixed grinding table is fixedly connected to the middle of the bottom wall of the forming chamber, the lower side of the feeding hopper is fixedly connected with the upper surface of the fixed grinding table, and uniformly distributed leakage grooves are formed in the lower side of the feeding hopper; the biomass particle fuel forming equipment is excellent in biomass particle forming effect.

The application discloses a high-strength magnesium alloy plate preparation method, and chemical components of the magnesium alloy plate are as follows in percentage by mass: 5.5-6.0% of zinc, 2.0-2.5% of ytterbium, 0.6-1.0% of zirconium, and the rest of magnesium. The preparation method involves four steps of alloy smelting, solid solution, inclined rolling and finishing. When the total reduction reaches 80-85% of the initial thickness, the magnesium alloy plate obtained has a room-temperature tensile yield strength of 350-390 MPa and a tensile strength of 370-430 MPa. The magnesium alloy plate prepared by the technology has the characteristics of high strength and less edge cracking, and has the technical advantages of low cost and high efficiency.