110results about How to "Excellent drawing performance" patented technology

The invention relates to a production method for optimizing the drawing performance of a steel wire rod for a carbon steel welding wire, belonging to the technical field of steel production. The technology path comprises the following steps of billet chemical composition control and inspection, heating of a walking heating furnace, rough rolling, top cutting by a flying shear, middle rolling, precision rolling in advance, high-speed precision rolling, sending and clamping, as well as spinning, temperature controlling, and disperse coil cooling, collecting coils, and steel wire rod inspection. The method is characterized in that through optimizing the technology parameters of operation key points, the effective control to microstructure of the steel wire rod for the carbon steel welding wire on a high-speed wire rod production line short of slow cooling capability is realized, and the frequent brittleness problem caused by the common structure reason in the drawing process, especially the high-speed drawing process of the steel wire rod for the carbon steel welding wire on produced on the production line is solved. The method has the advantages that the effective control of the steel wire rod structure for the carbon steel wire on the traditional high-speed line material production line can be realized without prolonging the length of slow cooling, and the generation of the low-temperature hard phase structure is avoided, thus the drawing performance of the steel wire rod is changed, and the requirement of drawing use of the type of the steel wire rod is met.

The invention discloses a preparation method of an aluminium alloy strip for the stamping and stretch forming of a cell phone shell. The preparation method comprises the following steps of: smelting, pouring, homogenizing annealing, hot rolling and cold rolling. By optimizing the alloying components, formulating and optimizing the homogenizing annealing technology after pouring and accurately controlling the temperatures of hot rolling and cold rolling, the performances of the designed alloy can be fully realized, namely the comprehensive mechanical property of the aluminium alloy strip is excellent, the room temperature tensile strength is 285-320MPa, the elongation rate is more than 25% and the cupping test value is more than 10nm. Therefore, the aluminium alloy strip can fully meet the use demand of the stamping and stretch forming of the cell phone shell.

The invention relates to a drahtstahl for a fastening piece and a production method thereof, and the drahtstahl comprises the following components by weight percent: 0.39-0.48 % of C, 0.15-0.35% of Si, 0.30-0.90% of Mn, 0.60-1.20% of Cr, 0.010-0.07% of Als, less than or equal to 0.035% of P, less than or equal to 0.035% of S and the balance Fe and unavoidable impurity; and the production method comprises the following steps: smelting with a clean steel process and casting into a blank, and adding Si-Ca line in the refining; heating the continuous casting to 980-1,080 DEG C; rough rolling: controlling the deflection to be 70-80%; intermediate rolling: controlling the deflection to be 80-90%; pre-precision rolling: controlling the deflection to be 65-75%; water-cooling until the temperature is cooled to be 1,000-1,020 DEG C; precision rolling: controlling the deflection to be 60-90%; water-cooling for the second time until the temperature is cooled to be 800-900 DEG C; spinning; cooling to phase change initial temperature, namely the range from Ar3 to 50 DEG C higher than Ar3 by adopting an aerial fog mixed method; and continually cooling until the temperature is cooled to be 400-500 DEG C and naturally cooling to environment temperature. The invention can be drawn directly, has good cold deformation and is not easy to crack.

The invention belongs to the technical field of rolling, and relates to a controlled rolling and controlled cooling method for a medium-carbon CrMo steel wire rod capable of being directly subjected to drawing machining in a hot rolling state. The method comprises the steps that a steel billet is heated at the temperature not higher than 1,100 DEG C for 1.5-2 hours; a finish rolling unit and a mini unit conduct rolling at the ultralow temperature not higher than 750 DEG C; the spinning temperature adopts the ultralow temperature not higher than 750 DEG C; and the cooling speed of the steel wire rod on a Stelmor controlled cooling line is not higher than 0.12 DEG C/s. According to the technology, separation of a proeutectoid structure is effectively promoted, it is guaranteed that undercooled austenite is completely converted on the Stelmor controlled cooling line, and conversion of bainite and martensite is effectively prevented; and meanwhile, the gain size of ferrite is not smaller than that of a 12-grade fine grain structure, the medium-carbon CrMo steel wire rod has the good drawing performance in the hot rolling state, cold drawing with the reduction rate not lower than 30% can be conducted at a time, and the one-time spheroidizing annealing cost is reduced for downstream users.

The invention discloses a preparation method of a cold-rolled sheet for a flux-cored wire, belonging to the field of processing of metal materials. The cold-rolled sheet comprises the following chemical components in percentage by mass: 0.005-0.045 percent of C, less than or equal to 0.03 percent of Si, 0.15-0.26 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.010percent of S, less than or equal to 0.030 percent of Alt, less than or equal to 0.0030 percent of N and the balance of Fe. The method comprises the following steps of: performing hot rolling, acid washing and cold rolling in sequence on a steel billet to obtain a cold-rolled strip coil; and performing continuous annealing and flat processing methods. The cold-rolled sheet has the advantages of low yield strength, high tensile strength, excellent cold molding performance, excellent puling performance, high production speed, short period, high yield and high quality; and compared with the conventional process, the method has excellent advantages, and the use requirement of steel for the flux-cored wire can be better met.

The invention relates to the technical field of metal machining, and discloses a female die, die and device for plate blank differential temperature drawing molding and a drawing method. The female die is provided with an air inlet passage used for leading cold air into a groove of the female die, and an exhaust passage used for exhausting the cold air out of the groove; and the die comprises a male die, an edge pressing device and the female die which are sequentially arranged in the vertical direction. The device comprises a pressing machine and the die. The drawing method includes the steps that firstly, a plate blank is tightly pressed between the edge pressing device and the female die; and secondly, the plate blank is drawn in the groove of the female die. By means of the technical scheme, the ultimate deformation degree of the plate blank can be improved, and the drawing performance of the plate blank is further improved.

The invention belongs to the technical field of lithium ion aluminum plastic film production, and particularly relates to a photocuring adhesive for a lithium battery aluminum plastic film. The photocuring adhesive is prepared from the following components in parts by weight: 20 to 70 parts of modified polyurethane acrylate oligomer, 5 to 20 parts of functional monomer, 20 to 70 parts of diluent monomer, 1 to 8 parts of photoinitiator and 1 to 6 parts of thiol compound. According to thephotocuring adhesive disclosed by the invention, the aluminum foil, the nylon film and the CPP film are tightly attached together, and the prepared aluminum-plastic film has good deep-punching forming performance and humidity and heat resistance; the photocuring adhesive replaces inner and outer layer glue used by a conventional aluminum plastic film, does not cause generation of volatile organic compounds (VOC) in the processing process, and is environment friendly and smaller in energy consumption; the aluminum-plastic film does not need to be cured in a drying room, so that the technological preparation period of the aluminum-plastic film is greatly shortened, the input amount of cost in the aspects of manpower, time, energy consumption and the like is reduced, and the productivity of the aluminum-plastic film is improved.

Alloy structural steel for welding wire, among which: C: 0.08~0.13; Mn: 1.20~1.70; Si: 0.65~0.90; Cr: ≤0.10; Al: ≤0.015; Mo: ≤0.10; 0.02; S: ≤0.008; Cu: ≤0.10; P: ≤0.012; B: ≤0.005; Ti: ≤0.020; N: 0.0040~0.0150; O: ≤0.0015; ≤0.015; Ca: ≤0.0004; the balance is Fe and unavoidable impurities. The manufacturing method includes: a. electric arc furnace smelting, tapping conditions: [C]≥0.04%; [P]≤0.006%; tapping temperature: 1620-1660°C; b. Deoxidation of powder and C powder slag surface; c. pouring; d. rolling, soaking temperature 1070-1200°C, holding time 100-160min, furnace temperature 1050-1180°C, inlet temperature 780-850°C; e. cooling, on-line Slow cooling, cooling rate 40 ~ 80 ℃ / h. The structural steel has high purity, good drawing performance and toughness.

The invention discloses a spheroidizing annealing method for a low-alloy high-strength welding wire. The spheroidizing annealing method for the low-alloy high-strength welding wire comprises the steps that firstly, the low-alloy high-strength welding wire to be drawn is heated to the annealing temperature firstly and subjected to heat preservation for a set heating time; and secondly, the low-alloy high-strength welding wire to be drawn is air-cooled to the room temperature after being cooled to a set temperature in a furnace, and thus annealing operation is completed. A welding wire rod treated through the method is subjected to recrystallization annealing, so that the structure with spheroidite distributed on a ferrite matrix is obtained; and thus the strength of materials is reduced and the plasticity of the materials is improved.

The invention belongs to the field of welding processes and discloses an ultrasonic arc laminating and rolling thin-wall steel tube welding device and welding method. The device comprises an ultrasonic arc generating device and a rolling and laminating device. An upper rolling and laminating wheel (5.1) is laminated to the outer wall surface of the thin-walled steel tube with zero clearance, and the radian curvature of the upper rolling and laminating wheel (5.1) is matched with the diameter of the outer side of the thin-walled steel tube; a lower rolling and laminating wheel (5.2) is laminated to the inner wall surface of the thin-walled steel tube with zero clearance, and the radian curvature of the lower rolling and laminating wheel (5.2) is matched with the diameter of the inner side of the thin-walled steel tube; and the upper rolling and laminating wheel (5.1) and the lower rolling and laminating wheel (5.2) correspond in position. The ultrasonic arc generating device introducesultrasonic arcs into a weld pool. The upper and lower rolling and laminating wheels are laminated to the steel tube in a rolling manner without zero clearance, so that grains of a weld joint of the steel tube are refined, the ductility of the weld joint is improved, and the tearing tendency in a follow-up drawing process is reduced.

The invention discloses a rutile flux-cored wire with tensile strength of 800 MPa grade and a preparation method thereof. The flux-cored wire comprises a cover and a core; and the core comprises the following components: 20-40 weight parts of rutile, 2-10 weight parts of silicate minerals, 2-10 weight parts of magnesium powder, 0.2-4 weight parts of fluoride, 2-8 weight parts of titanium powder, 2-8 weight parts of molybdenum iron, 10-20 weight parts of nickel powder, 10-20 weight parts of electrolytic manganese, 2-8 weight parts of 75 silicon iron, 2-8 weight parts of wollastonite, and 12-17weight parts of iron powder. Compared with the prior art, the flux-cored wire is excellent in welding process performance and physical and chemical property, achieves such purposes as excellent welding process performance, stable arc, low splashing, beautiful molding of welding lines and capability of welding in all positions on process, and achieves the purpose of excellent mechanical performanceon performance.

The invention relates to a novel lithium ion battery aluminum plastic soft packaging film which is sequentially provided with a heat-tolerant protection layer, an aluminum foil layer, an adhesive glue layer and a thermoplastic resin film layer from outside to inside. Polyurethane-acrylate ultraviolet curing paint is cured through ultraviolet light to form a coating which is provided with the heat-tolerant protection layer, the polyurethane-acrylate ultraviolet curing paint comprises, in weight percentage, 60wt%-75wt% of polyurethane-acrylate pre-polymers, 20wt%-35wt% of active monomers, 3wt%-5wt% of photo-initiators and 0.1wt%-1.0wt% of additives. A heat-tolerant resin layer of the aluminum plastic soft packaging film is a polyurethane-acrylate resin layer cured by the ultraviolet light, the aluminum foil layer is directly coated with the heat-tolerant resin layer, use of the adhesive glue layer is decreased, and an interlayer structure of the aluminum plastic soft packaging film is simpler.

The invention discloses molybdenum containing stainless steel welding rod steel. The molybdenum containing stainless steel welding rod steel comprises, by weight percent, smaller than or equal to 0.03% of C, 0.45%-0.65% of Si, 1.5%-2.5% of Mn, smaller than or equal to 0.02% of P, smaller than or equal to 0.002% of S, 13.0%-14.0% of Ni, 23.0%-25.0% of Cr, 2.0%-3.0% of Mo, smaller than or equal to 0.5% of Cu, smaller than or equal to 0.07% of N and the balance iron and inevitable impurities. The invention further discloses a preparing method of the molybdenum containing stainless steel welding rod steel. Through the component optimization design and technology improvement, 309 Mo stainless steel welding rod steel which is qualified in quality and stable can be produced in batches, wherein the ferrite content is high (25%).

The invention relates to a stelmor cooling control technique comprising a wind cooling process and a water cooling process. In the water cooling process, in at least one water cooling section, each water-spraying nozzle sprays water to the wires walking on a cooling roller table at the spraying angle of 15-25 degrees in the alternating arrangement way of 85-95 degrees, wherein the spraying angle is the angle between a water-spraying nozzle axis and a wire walking direction; and in the wind cooling process, a wind-blowing nozzle blows wind to the wires walking on a cooling roller table from thedirections of up and down, left and right, of the cooling roller table. The stelmor cooling control technique can effectively destroy the cooling state of a film on the surface of a steel bar, form anuclear cooling state of directly contacting with the steel, can reduce or suppress the precipitation of reticular tissues, and ensures that the main control tissue is a homogeneous sorbite tissue, so as to obtain good drawing performance.

The invention belongs to the technical field of lithium battery flexible packaging, and particularly relates to a hyperbranched modified adhesive, a preparation method thereof and an aluminum-plastic film. The hyperbranched modified adhesive is prepared from the following components by weight: 20-70 parts of matrix resin, 4-20 parts of a curing agent, 0.5-5 parts of a composition of hyperbranched polymer and epoxy resin and 20-90 parts of a solvent. Based on the performance advantages of low entanglement, low viscosity, good solubility, high-density functional groups and the like of a highly branched structure of the hyperbranched polymer, the hyperbranched polymer is used for modifying the adhesive, and a large number of holes in hyperbranched polymer are beneficial to plastic deformation of a matrix, so that an adhesive layer can be toughened; a large number of active functional groups can participate in an epoxy resin curing system, and the interface action with the matrix can be enhanced, so that the deep drawing performance can be improved while the bonding strength of the aluminum-plastic film is improved.

The present invention relates to a method for the production of conical cross-wound bobbins (5) with S-twisted yarn. According to the invention the S-twisted yarn as a sleeve (18) wound that forms a p-winding and symmetry ratio, i.e., the ratio of the laying speed between, as seen from the operating side, left and right front side of the cheese (5 ), is increased during the bobbin travel. The invention also relates to the cross-wound bobbin produced by the process (5) and the winding device (4) for carrying out the method.

The invention provides a high-temperature-resistant aluminum-plastic composite film. The composite film includes a matte layer, a nylon layer, a first adhesive layer, an aluminum foil layer, a secondadhesive layer and a PP layer which are arranged in sequence from top to bottom; a plurality of hollow glass microbeads are arranged in the matte layer, and the hollow glass microbeads are connected with one another by an adhesive. According to the high-temperature-resistant aluminum-plastic composite film proposed by the invention, the matte layer is additionally arranged on the outer layer of the nylon layer, a filler of the coating is hollow particles, the hollow particles have high-temperature resistance and make the surface of nylon have spherical protrusions, so that a contact area of the coating with a mold during deep drawing molding is reduced, friction is reduced, and deep drawing performance is improved; the product is suitable for all existing aluminum-plastic films, and an operation method of the product is simple and easy to implement, improves the efficiency of battery manufacturers, and improves the product performance of the aluminum-plastic film.