18results about How to "Improve deep drawing performance" patented technology

The invention relates to the technical field of steel rolling, and discloses a low-waviness galvanized IF steel outer plate and a preparation method thereof.The low-waviness galvanized IF steel outer plate comprises, by weight, 0 < C < = 0.0035%, 0 < Si < = 0.03%, 0.08% < = Mn < = 0.25%, 0 < P < = 0.02%, 0 < S < = 0.015%, 0.02% < = Al < = 0.055%, 0.02% < = Ti < = 0.075%, 0 < = Nb < = 0.035%, 0 < = N < = 0.005% and the balance Fe and inevitable impurities; and the waviness Wsa of the low-waviness galvanized IF steel outer plate is less than or equal to 0.35 mu m. According to the scheme, the problem that long waves generated by a floating-coat-free 2C1B coating process exceed the standard due to the fact that the corrugation degree is too high after the steel plate is subjected to stamping deformation is solved, the brightness of the steel plate after forming and coating can be greatly improved, and the method has important significance on improving the production efficiency of turning enterprises.

The utility model discloses a film electronic cross-linking device and relates to a packaging film production device. The utility model aims to solve the problems that the mechanical strength and the barrier property of a film produced by the existing down-blowing or casting process are greatly different from those of a double-drawing film, and the deep drawing property is lower. The device comprises a preheating roller, a cooling roller, an annealing roller and a winding bracket which are respectively in running fit with power output shafts of a preheating roller motor, a cooling roller motor, a rotating roller motor and a winding motor; the speed regulation signal output end of the controller is electrically connected with the speed regulation signal input end of a preheating roller motor, the speed regulation signal input end of a cooling roller motor, the speed regulation signal input end of a rotating roller motor and the speed regulation signal input end of a winding motor. The unwinding mechanism can release the wound film; the released thin film is wound on the winding bracket after being dragged by the preheating roller, the cooling roller and the annealing roller in sequence; the electronic crosslinking mechanism is located between the preheating roller and the cooling roller, and the electron emitting end and the electron receiving end of the electronic crosslinking mechanism are located on the two sides of the film respectively.

This application relates to the field of metallic materials technology, disclosing a highly formable aluminum alloy material, an aluminum alloy sheet, and a method for preparing the same. The aluminum alloy sheet, by mass percentage, comprises: Fe 0.8%~1.2%, Mn 0.4%~0.8%, Zr 0.1%~0.3%, Si 0%~0.05%, Cr 0.1%~0.3%, with the remainder being Al and other unavoidable impurity elements. The total content of Fe and Mn ranges from 1.45% to 1.6%. The method for preparing the aluminum alloy sheet includes: preparing an aluminum alloy melt; continuously casting the aluminum alloy melt to obtain a billet; continuously rolling the billet to obtain a hot-rolled sheet; and performing a first cold rolling on the hot-rolled sheet to obtain the aluminum alloy sheet. This application can improve the strength, plasticity, and deep-drawing performance of the aluminum alloy material, achieve high formability, simplify the process flow, improve efficiency, and reduce energy consumption.

The invention discloses a production method of 16Cr ferritic stainless steel for flux-cored welding wire and a slab thereof, wherein the chemical composition of the 16Cr ferritic stainless steel is C: 0.020-0.030%, Si: 0.30-0.40%, Mn: 0.30-0.40%, P≤0.025%, S≤0.005%, Cr: 16.00-16.20%, N: 0.025-0.035%, and the rest is Fe and unavoidable impurities. The invention is produced by electric furnace-AOD converter-LF refining furnace-continuous casting process, and 400 series self-produced scrap steel is used for smelting, and the scrap steel ratio reaches more than 90%, which is a green and environmentally friendly production process. The invention uses the impact stirring effect of molten steel injected into the tundish to evenly distribute the refiner in the molten steel, nano-titanium induces ferrite nucleation, and combined with low superheat and high-current electromagnetic stirring, reduces the grain size of the slab, improves the plasticity and toughness, and meets the requirements of the composition of thin-gauge ferritic stainless steel products for flux-cored welding wires, molten steel purity and deep drawing performance.

The application relates to a synergistic casting-rolling method for eliminating bright star defects in the dark surface of 8011 aluminum alloy single zero foil, and relates to the technical field of aluminum alloy casting-rolling processing. The method comprises the following steps: S1, melt refining: introducing aluminum alloy melt into a holding furnace for refining, and the refining time interval is 2.5-3.5 h / time; S2, casting-rolling cooling: adopting circulating cooling water to cool the casting-rolling roller, the water pressure is controlled to be 0.42-0.48 MPa, and the water temperature is controlled to be 35-40 DEG C; and S3, casting-rolling forming: sending the melt into the casting-rolling roller through a casting nozzle for casting-rolling, the thickness of the strip is controlled to be 6.3-6.6 mm, and the rolling strip speed is controlled to be 700-730 mm / min. Through multi-dimensional synergy of melt purity control, cooling strength improvement, blank thinning and strip speed reduction, the application refines the grains in the casting-rolling area, effectively inhibits the segregation and precipitation of coarse Al-Fe-Si brittle intermetallic compounds, eliminates the bright star defects in the dark surface of the foil caused by the crushing of brittle phases in the subsequent cold rolling ultra-thinning process, and significantly improves the surface quality and the yield of the single zero foil.

The invention discloses a production method of a cold-rolled steel strip for a welding wire. The production method comprises the working procedures of converter smelting, continuous casting, hot rolling, cold rolling, continuous annealing and flattening. Refining treatment is not carried out; continuous annealing is adopted in the annealing process, and a heating device is arranged behind the rapid cooling section. According to the cold-rolled steel strip produced through the method, the yield strength Rp0.2 is smaller than or equal to 190 MPa, the tensile strength Rm is 280-350 MPa, the percentage elongation after fracture A80 mm is larger than or equal to 44%, the cold-rolled steel strip has good formability, welding performance and drawing machining performance, the surface quality is good after drawing, surface defects such as orange peel and wrinkling do not exist, and meanwhile the production cost is low.

Provided is a biaxially oriented polyester film that can be suitably used for deep drawing with a metal layer stacked thereon, is excellent in adhesiveness with the metal layer and moldability, is excellent in blocking resistance, and has little curling. The film having at least a base material layer and an easily adhesive layer each containing a polyester as a main component, stacked in an order of the easily adhesive layer / the base material layer / the easily adhesive layer, and satisfying all of (1) to (4) below: (1) a difference between reversible heat capacity differences ΔCp at around glass transition temperatures of the easily adhesive layer and the base material layer is 0.10 or more and 0.45 or less; (2) heat sealing strength between an easily adhesive layer of the film and an easily adhesive layer of an identical film is 0.5 N / 15mm or less; (3) a stress at 10% elongation F10 in each of an MD direction and a TD direction is 90 MPa or more and 160 MPa or less; and (4) a molecular orientation ratio measured by using a molecular orientation meter is 1.0 or more and 1.3 or less.

The invention discloses IF steel for a steering oil tank and a preparation method of the IF steel. The IF steel comprises the following components in percentage by mass: 0.0035 to 0.005 percent of C, 0 to 0.05 percent of Si, 0 to 0.4 percent of Mn, 0 to 0.015 percent of P, 0 to 0.012 percent of S, 0.02 to 0.1 percent of Al, 0.02 to 0.10 percent of Ti, 0 to 0.005 percent of N, 0.0005 to 0.0015 percent of B, more than or equal to 0 of Ti-4 * C-3. 4 * N-1. 5 * S, and the balance of Fe and other inevitable impurities, wherein the total mass of the IF steel is 100 percent. The secondary machining brittleness resistance of the IF steel can meet the stamping requirement of the steering oil tank, and the production cost of the IF steel can be reduced.

The invention provides a processing method for improving the performance of a battery soft package aluminum foil and a high-deep-drawing battery soft package foil. According to the method, a process route of a cold rolling process 1-an intermediate heat treatment annealing process-a cold rolling process 2-foil rolling and slitting-a finished product heat treatment annealing process is adopted, and the high-deep-drawing battery flexible package foil is prepared. According to the processing method, by changing the cold rolling process and the heat treatment process of the battery soft package aluminum foil blank, the performance of the blank is improved, and the blank energy storage is increased; after foil rolling, rolling and slitting, recrystallization annealing is carried out on a battery soft package finished product aluminum foil at a relatively low temperature, so that the dispersion strengthening of crystal grains is improved, the uniform and fine size of the crystal grains is promoted, and the deep drawing performance of the finished product aluminum foil is improved. And meanwhile, the aluminum foil roll cannot be adhered when being unfolded through a lower-temperature heat treatment process, so that the use performance of the aluminum foil is improved.

The present application relates to the field of material and metallurgy, and particularly relates to a high-strength steel for household appliance plate with good structure and forming performance and a preparation method thereof.The steel contains the following chemical components: C, Si, Mn, P≤0.010%, S≤0.004%, Cr, Mo, Ti, N, O, B, Alt, and 1.58≤B / N≤3.30, and 2.1≤(La+Pr+Ce) / S≤4.0 is additionally added, and the balance is Fe and inevitable impurities.The present application solves the problems of the existing material, such as soft strength (generally, the yield strength is not more than 220MPa), poor surface roughness, structure uniformity and plate shape control, and produces a high-strength steel product for household appliance plate with excellent weldability, deep drawing formability, performance consistency and coating performance.

The invention discloses ultra-thin ultra-low carbon steel and a manufacturing method thereof. The ultra-thin ultra-low carbon steel comprises the following chemical components in percentage by weight: less than or equal to 0.0020% of C, less than or equal to 0.030% of Si, 0.08-0.15% of Mn, 0.040-0.080% of Ti, 0.010-0.050% of Nb, less than or equal to 0.0005% of B, less than or equal to 0.0040% of N, 0.015-0.050% of Als, less than or equal to 0.020% of Cr, less than or equal to 0.020% of Cu and the balance of Fe and inevitable impurities. According to the ultra-thin ultra-low carbon steel produced through the method, the hot coil yield strength is 130-150 MPa, the tensile strength is 270-290 MPa, the yield ratio is 0.48-0.60, the hardness is 43-48 HRB, and the plastic strain ratio r is 1.20-1.40. Compared with a conventional process, the ultra-low carbon steel hot coil produced through the method has the advantages that the yield strength of the ultra-thin ultra-low carbon steel hot coil is 130-150 MPa; the average yield strength corresponding to the head position, the middle position and the tail position of a hot coil is reduced by 39.6%-41.46%, the average tensile strength is reduced by 9.51%-11.42%, the average hardness is reduced by 6.59%-6.35%, the average yield ratio is reduced by 32.78%-34.76%, the average r is increased by 36.86%-45.62%, and the deep drawability of the material is improved by reducing the material strength, especially increasing the r value.

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.

The application provides a method for preparing a ferrite-rolled ultra-low-carbon bake-hardening steel in an ultra-short process and a steel strip, and belongs to the technical field of metallurgy. The method completely omits the cold rolling and continuous annealing process, and comprises the following steps: heating a slab with a predetermined chemical composition; rough rolling the slab in an austenite zone to obtain an intermediate slab; finish rolling the intermediate slab in a ferrite zone, wherein the cumulative equivalent strain of the finish rolling is greater than or equal to 2.3, and a steel strip is obtained; coiling the steel strip, wherein the coiling temperature is 680-720 DEG C, and the coiling is kept for 30-60 min, and then the steel strip is cooled to room temperature to obtain a target steel strip. The method for preparing a ferrite-rolled ultra-low-carbon bake-hardening steel in an ultra-short process can directly obtain an ULCBH steel with high deep-drawing performance and high bake-hardening performance in a hot-rolled state.

The invention provides a preparation method of a hot-dip galvanized coating steel plate. A smelted and cast steel plate blank is subjected to hot continuous rolling and cold continuous rolling to control the plate shape of the steel plate; initial nucleation and growth of gamma-oriented texture grains are promoted through continuous annealing, so that the strip steel obtains good deep drawability; after hot galvanizing is conducted on the strip steel, flattening treatment is conducted to guarantee the steel plate shape; the coating film is prepared on the surface of the hot-dip galvanizing layer, so that the coating film and the hot-dip galvanizing layer form a stable compound layer, the compound layer has excellent stamping and coating lubricating properties, and even under the conditions of high temperature and severe friction of high-speed large-deformation stamping, the coating film on the surface of the hot-dip galvanizing layer has good stamping lubricating property, so that the hot-dip galvanizing layer can be subjected to hot-dip galvanizing. Therefore, the phenomena of surface zinc layer falling and powder falling during processing are greatly reduced, the product surface quality is improved, the manual shutdown die wiping frequency is reduced, the die cleaning frequency is reduced, and the production efficiency is improved.

The invention belongs to the technical field of aluminum-based materials, and particularly relates to a high-strength and high-elongation 1100D aluminum foil and a preparation method thereof. Through composite addition of multiple elements such as RE and Zr and fine process control, the material strength is remarkably improved while good plasticity and machinability of the aluminum foil are guaranteed, the prepared aluminum foil overcomes the problem that the strength of a traditional 1100 series alloy is low or the ductility is sharply reduced after the strength is improved, and the comprehensive mechanical property of the aluminum foil is superior to that of a conventional product.

The invention provides a cover annealing furnace production method of an SPCC cold-rolled steel plate with a plastic strain ratio r90 value greater than or equal to 2.3, which comprises the following steps: controlling the chemical components of molten steel in percentage by weight: 0.03-0.05% of C, less than or equal to 0.06% of Si, 0.12-0.22% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S and 0.020-0.040% of Alt, and annealing a cold hard coil in a cover annealing furnace; firstly heating to 350 DEG C at a full speed, then heating from 350 DEG C to 710 DEG C at a controlled slow speed, and controlling the heating time at the section to be 500 minutes; and preserving heat according to the thickness of the steel plate after the temperature reaches 710 DEG C, and then cooling and discharging according to a conventional process. The deep drawing forming performance of the product is greatly improved.

The invention relates to the technical field of aluminum alloy production, in particular to a process for producing a 1060 aluminum alloy deep drawing material through continuous cast rolling, which comprises the following steps of: screening electrolytic aluminum liquid, proportioning, refining in a furnace, carrying out online treatment, carrying out cast rolling and carrying out cold rolling, according to the method, pure electrolytic aluminum liquid and aluminum ingots are selected, alloy element composition is optimized, metal Sr is added into alloy components to conduct modification treatment on melt, spheroidizing treatment of an AlFeSi secondary phase is achieved, the grain uniformity of materials is improved, and the metallurgical quality of cast-rolled strip billets is improved; the crushing effect of a grain structure and a secondary phase is improved through a large machining rate, a finished product annealing process between recovery and complete recrystallization is adopted, the basic balance of an internal deformation texture and a cubic texture of the material is adjusted, the deep drawing performance of the material is improved, the earing rate of the 1060 deep drawing material is controlled within 2%, grain refinement during recrystallization annealing is facilitated, and the yield of the 1060 deep drawing material is improved. The problem that lines on the high-deep-drawing surface are thick is solved.

According to the manufacturing method, reasonable smelting, continuous casting, heating, rolling, cooling and coiling processes are adopted, a Z-shaped cooling process is adopted for cooling, the length L1 of a high-temperature area of a hot coiling head is set according to different thicknesses h of strip steel finished products, L1 is equal to (100-120) h, the unit of L1 is m, the unit of h is mm, the coiling temperature CT1 of the high-temperature section of the hot coiling head is equal to CT + T, t is equal to 40-60 DEG C, and the coiling temperatures CT of the middle part and the tail part of the hot coil are equal to 600-650 DEG C, so that the problem that the fluctuation of the mechanical property, especially the plastic strain ratio, of an ultra-thin low-carbon steel through coil produced by a traditional hot continuous rolling process is relatively large can be solved, the uniformity of the mechanical property of the low-carbon steel through coil is improved, and the stamping forming cracking probability of the low-carbon steel through coil is reduced. Equipment investment does not need to be increased, and the cost is low.