220results about How to "Improve deep drawing performance" patented technology

The invention discloses an aluminum alloy strip for an integrated battery cover plate and a preparing method of the aluminum alloy strip. The aluminum alloy strip comprises components including 1.2%-1.5% of Fe, 0.25%-0.5% of Mn, 0.05%-0.2% of Si, 0.005%-0.1% of Ti, smaller than or equal to 0.05% of Cu, smaller than or equal to 0.05% of Mg, smaller than or equal to 0.05% of Zn and the balance aluminum and inevitable impurities. Through component design and technology control, the characteristics that when an Al-Fe-Mn alloy is machined to a certain degree, softening happens, and a high laser absorbing rate and a low heat conductivity coefficient are achieved are utilized, during downstream manufacturing, the battery cover plate and an anti-explosion port are directly integrally punched and formed, annealing and welding are avoided, an anti-explosion sheet is uniform in thickness and stable in performance, the anti-explosion sheet and cover plate welding procedure and leakage, instable detonation pressure and other hidden danger caused by welding are reduced, and the preparing method of the aluminum alloy strip for the battery cover plate is novel.

The present invention provides a high-strength steel sheet useful for applications to automobile steel sheets and the like and having excellent deep drawability, a tensile strength (TS) of as high as 440 MPa or more, and a high r value (average r value≧1.2), and a process for producing the steel sheet. The steel sheet has a composition containing, by % by mass, 0.010 to 0.050% of C, 1.0% or less of Si, 1.0 to 3.0% of Mn, 0.005 to 0.1% of P, 0.01% or less of S, 0.005 to 0.5% of Al, 0.01% or less of N, and 0.01 to 0.3% of Nb, the Nb and C contents in steel satisfying the relation, (Nb/93)/(C/12)=0.2 to 0.7, and the balance substantially including Fe and inevitable impurities. The steel microstructure contains a ferrite phase and a martensite phase at area ratios of 50% or more and 1% or more, respectively, and the average r value is 1.2 or more.

The present invention provides a steel sheet excellent in workability, which may be used for components of an automobile or the like, and a method for producing the same. More specifically, according to one exemplary embodiment of the present invention, a steel sheet excellent in workability, including in mass, 0.08 to 0.25% C, 0.001 to 1.5% Si, 0.01 to 2.0% Mn, 0.001 to 0.06% P, at most 0.05% S, 0.001 to 0.007% N, 0.008 to 0.2% Al, at least 0.01% Fe. The steel sheet having an average r-value of at least 1.2, an r-value in the rolling direction of at least 1.3, an r-value in the direction of 45 degrees to the rolling direction of at least 0.9, and an r-value in the direction of a right angle to the rolling direction of at least 1.2.

The invention provides a producing method for ultra low steel carbon used in car outer plate, characterized in that liquid steel is cast into plate slab in the pulling speed of 1.5-4m/min; the thickness of plate slab is 100-170mm; casting machine adopts dynamic light pressure and crystallizer electromagnetic braking technology and tundish superheat is 20-45deg.C; the plate slab is installed in heat directly and the charging temperature is more than 800deg.C; the plate slab is heated to 1150-1250deg.C in heating furnace; after the temperature is maintained for 30-90min rough rolling cogging is carried out. By adopting continuous rolling and casting short-flow process of medium-thin plate slab and collocating casting machine and heating furnace compactly quick charging is realized; charging material temperature is improved; problems of large investment and high energy consumption in conventional process are solved; inner limitation generated in continuous casting process of thin plate is eliminated; it is guaranteed that product is provided with good surface quality and stable mechanical property.

The invention discloses a preparation method of a magnesium alloy strip for a cell phone shell. The preparation method is characterized in that the magnesium alloy comprises the following components by weight percent: 2%-4.5% of Al, 0.5%-0.8% of Si, 0.7%-1.2% of Cu, 0.5%-1.0% of Mn, 0.1%-0.8% of Zn, 0.2%-0.3% of Ti and the balance of Mg and inevitable impurities. The preparation method comprises the following steps: smelting, performing homogenizing annealing, performing hot rolling and performing cold rolling. The tensile strength of the magnesium alloy strip is 190MPa-210MPa, the elongation at break is 8.0%-10.0%, and the earring rate is 2%-3%; and the magnesium alloy strip can meet the thin stretching and punching forming requirement of the cell phone shell.

A P- and Ti-added galvannealed steel sheet superior in ductility, and a process for production thereof. It is made of a cold-rolled steel sheet and has alloyed hot-dip galvanizing on the surface thereof, said cold-rolled steel sheet having the chemical composition (in terms of wt %) of C: less than 0.010%, Si: no more than 0.5%, Mn: 1.0~3.0%, P: no more than 0.20%, S: no more than 0.01%, Al: 0.005~0.10%, N: no more than 0.0050%, Ti/48-(C/12+N/14+S/32): 0.0003~0.0018 with the remainder being chiefly Fe, and said cold-rolled steel sheet being characterized by rho1<=107 and rho2<=5x105, where rho1 is the number of precipitates whose particle diameter (D) is in the range of 10 nm<=D<100 nm and rho2 is the number of precipitates whose particle diameter (D) is in the range of 100 nm<=D.

The invention relates to a processing method for producing low-cost high-formability IF (interstitial-free) steel, which is based on thin-slab continuous casting and rolling and adopts a ferrite rolling process to produce the IF steel, belonging to the technical field of IF steel production. The processing method comprises the following working procedures of steelmaking, continuous casting, heating, rolling, cooling and coiling. A thin-slab continuous casting machine is adopted, the thickness of a continuous casting slab is at most 100mm, and the charging temperature is at least 880 DEG C. During hot rolling, a roughing mil and a finishing mill keep a continuous rolling relationship and keep micro-tension control, and water cooling equipment is used between the roughing mil and the finishing mill and is used for uniformly reducing the temperature of an intermediate slab with a thickness of 12-25mm from the temperature at least 950 DEG C of the outlet of the roughing mil into the range of 750-850 DEG C. Finish rolling is carried out in a ferrite area, and a lubrication rolling technology is adopted. The coiling temperature is higher and is 680-760 DEG C, slow cooling is carried out after coiling, and thereby an annealing process is finished. The invention provides a method for obtaining high-formability hot rolled sheets without cold rolling and cover annealing. The method has the advantages of being simple in process, low in cost, high in production efficiency, short in flow and the like, and the formability of products is higher.

The invention provides a processing method of a low yield ratio high strength titanium coiled plate for a heat exchanger. The processing method of the titanium coiled plate comprises the following steps of: preparing a plate blank; rolling a hot coil; annealing the hot coil; performing surface treatment on the hot coil; cold rolling; degreasing; and annealing to obtain the low yield-ratio high titanium coiled plate for the heat exchanger. According to the processing method, the content of a titanium cast ingot is controlled, and the processing technology of a titanium tape is utilized, so that the tensile strength of a titanium plate is about 385+/-15MPa, and the yield ratio is not greater than 70%; and with the improvement of the tensile strength of the titanium plate for the heat exchanger, the design thickness of the titanium plate can be reduced by more than 10%, and therefore, the titanium plate being 0.5 to 1.2mm in thickness can be prepared for the heat exchanger. Compared with the titanium coiled plate in the prior art, the titanium coiled plate processed by the method provided by the invention has high strength, low yield ratio and high deep drawing performance, and the production cost is also greatly decreased.

The present invention provides a metal sheet rolling method of rolling a metal sheet with a pair of rolls, as well as a rolled sheet manufactured by the metal sheet rolling method. In the metal sheet rolling method, respective interfaces between the pair of rolls and the metal sheet have mutually different frictions. Additionally at least one of the interfaces may be lubricated by a procedure other than lubrication by coating of a liquid lubricant agent. Alternatively at least one of the interfaces may be subjected to surface treatment by a procedure other than lubrication, or otherwise the pair of rolls may be made of mutually different materials.

The invention belongs to the field of preparation of aluminum alloy strips and particularly relates to an aluminum alloy strip applied to new energy power battery shells and a preparation method thereof. The aluminum alloy strip comprises the following components: 0.1-0.4wt% of Si, 0.4-0.7wt% of Fe, 0.06-0.14wt% of Cu, 1.0-1.2wt% of Mn, smaller than 0.05wt% of Mg, 0.01-0.03wt% of Ti and the balance of Al. Through the aluminum alloy strip, the components of the aluminum alloy strip are optimized on the basis of 3003 alloys; through reasonable distribution of homogenization heat treatment, a hot rolling process, an annealing process and a cold rolling process, the aluminum alloy strip can meet high deep drawing performance and can achieve effective laser welding with a cover plate. The preparation method of the aluminum alloy strip is economical and is easy to popularize.

The invention relates to a steel containing P and used for an intermediate frequency (IF) automotive panel and a production method thereof. The steel comprises the following components by weight percent: less than or equal to 0.0048% of C, 0.04-0.06% of Si, 0.28-0.35% of Mn, 0.045-0.096% of P, 0.04-0.065% of Ti, 0.02-0.025% of Al, 0.0023-0.007% of B, less than or equal to 0.015% of S, less than or equal to 0.003% of N and the balance of Fe and inevitable impurities. The production method comprises the following steps: smelting and casting into a blank; heating and heat preserving the casting blank; rough rolling, finish rolling, reeling up, conventionally pickling, cold rolling and continuously annealing for later use. After a trace of B is added in the steel, a competitive grain-boundary segregation rule of B and P is utilized and a continuous annealing technological parameter is controlled, thereby the problem of secondary cold machining brittleness caused by P grain-boundary segregation is lowered, the value r achieves 1.9 and over 1.9 and the forming property is better and more stable.

The invention discloses a preparation method of a copper-aluminum composite plate strip. The preparation method comprises the following steps that a copper plate and an aluminum strip with the sizes conforming to the requirements are selected according to the requirement of a finished product, wherein the copper plate serves as a base plate material, and the aluminum strip serves as an embedded material; homogenizing annealing treatment is conducted on the copper plate, wherein the annealing temperature is 320-400 DEG C, and the heat preservation time is 0.5-3 hours; homogenizing annealing treatment is conducted on the aluminum strip, wherein the annealing temperature is 180-220 DEG C, and the heat preservation time is 1-3 hours, and water quenching is conducted after annealing treatment is completed; surface pre-treatment is conducted on the copper plate and the aluminum strip, grease, surface oxidated scale and other impurities are removed, and surface roughness polishing is conducted on the copper plate and the aluminum strip; the aluminum strip is embedded into an embedding groove of the copper plate, and then multi-pass cold rolling cladding treatment is conducted; high temperature thermal treatment is conducted on the copper-aluminum composite plate which is subjected to cold rolling cladding under the atmosphere protection, and the needed finished product is obtained; and through early thermal treatment, surface pre-treatment, the multi-pass cold rolling and thermal treatment annealing technology, the copper-aluminum composite plate with an interface transition structural layer excellent in property is accordingly obtained.

The invention provides an interstitial free hot rolled strip and a manufacturing method thereof. The mass percents of the chemical constituents of the strip are as follows: 0<C<=0.005, 0<P<=0.018, 0<S<=0.015, 0<N<=0.004, 0<Si<=0.03, Mn 0. 10-0.20, Al 0.02-0.06, 0<Ti<=0.070, 0<Nb<=0.020, 0<Cr<=0.05, 0<Ni<=0.07, 0<Cu<=0.07, 0<Mo<=0.020 and the balance of Fe and other inevitable impurities. The manufacturing method comprises the steps of preparing continuous castings according to the constituent requirement and processing the continuous castings into the hot rolled strip. The manufacturing method of the strip comprises the following steps: A. preparing continuous castings to be desulfurized by liquid iron pretreatment, smelted in a top-bottom combined blowing converter, RH refined and continuously cast by heavy slabs; B. adopting the traditional hot continuous rolling process to process the continuous castings into the hot rolled strip; the finishing temperature is 880-930 DEG C; the hot rolled strip is quickly water-cooled to the temperature of 680-750 DEG C to be reeled up and then is cooled to the room temperature. The strip manufactured by the method has low strength, high plasticity and good processing technic.

The invention relates to steel for two piece can and a manufacturing method thereof, the proportion by weight percent of the steel is that: 0.001%<=C<=0.003%; Si<=0.02%, 0.1%<=Mn<=1.0%, P<=0.015%, S<=0.020%, Al<=0.1%, N<=0.005%, the proportion also comprises at least one of four elements: Nb<=0.01%, Ti<=0.01%, Cr<=0.02%, Ni<=0.02%, the rests are Fe and unavoidable impurities. The manufacturing method comprises the steps of: 1) smelting according to above ingredients to cast into the billet; 2) heating and rolling the billet in the range from 1100 to 1250 DEG C, finally rolling the billet in single phase austenite area at the temperature over Ar<3>, the thickness of hot rolling plate is less than 3mm, the coiling temperature is 500 to 700 DEG C; 3) cool-rolling the billet with deflection of 80-95% after pickling; 4) performing recrystallization annealing to the billet below the 730 DEG C in the continuous annealing furnace; 5) secondarily cool-rolling with the deflection of 2-10% to obtain the product having the thickness less than 0.24mm. The steel of the invention includes outstanding processing performance and deep draw performance.

The present invention provides a high-strength steel sheet useful for applications to automobile steel sheets and the like and having excellent deep drawability, a tensile strength (TS) of as high as 440 MPa or more, and a high r value (average r value 1.2), and a process for producing the steel sheet. The steel sheet has a composition containing, by % by mass, 0.010 to 0.050% of C, 1.0% or less of Si, 1.0 to 3.0% of Mn, 0.005 to 0.1% of P, 0.01% or less of S, 0.005 to 0.5% of A1, 0.01% or less of N, and 0.01 to 0.3% of Nb, the Nb and C contents in steel satisfying the relation, (Nb/93)/(C/12) = 0.2 to 0.7, and the balance substantially including Fe and inevitable impurities. The steel microstructure contains a ferrite phase and a martensite phase at area ratios of 50% or more and 1% or more, respectively, and the average r value is 1.2 or more.

The invention discloses IF isotropic steel with stamping forming improved and a manufacturing method of the IF isotropic steel. The IF isotropic steel is composed of, by weight percent, 0.0012% to 0.0026% of C, not larger than 0.026% of Si, 0.28% to 0.52% of Mn, not larger than 0.015% of P, not larger than 0.010% of S, 0.042% to 0.082% of Al, 0.046% to 0.066% of Ti, not larger than 0.0030% of N and the balance Fe and inevitable impurities. According to the IF isotropic steel, in the subsequent hot rolling, cold rolling, continuous annealing, flattening and bridging production processes, the rolling temperature is controlled to range from 580 DEG C to 620 DEG C, the cold rolling reduction rate is controlled to range from 85% to 95%, the annealing temperature is controlled to range from 708DEG C to 742 DEG C, the flattening ductility is controlled to range from 1.0% to 2.0%, and the bridging ductility is controlled to range from 0.03% to 0.10%; and according to the obtained IF isotropicsteel, the surface roughness Ra ranges from 0.36 micrometer to 0.56 micrometer, the peak concurrent Pc is larger than or equal to 126, the hardness ranges from 95 HV to 110 HV, the plastic strain ratio r90 value is larger than or equal to 1.8, the work-hardening exponent n90 value is larger than or equal to 0.18, and the delta r value is smaller than or equal to 0.20. The beneficial effect that when a round component is deeply stamped, no earing or galling defect is generated is achieved.

Disclosed is a preparation method of a titanium plate for deep drawing. Titanium sponge which is not lower than the 0A level and meets the conditions that the O content is smaller than or equal to 0.05%, the N content is smaller than or equal to 0.006% and the Fe content is smaller than or equal to 0.05% is used as a raw material and subjected to smelting casting and forging, and two or more timesof drawing-out and/or upsetting are carried out in the forging process, so that a plate blank with a good structure and tiny texture is prepared; and then the plate blank is subjected to hot rolling,cold rolling and rolling in changed directions in combination with the steps of annealing and subsequent processing, so that the pure titanium plate with proper crystalline grains, qualified performance and a high Erichsen value is obtained. Through the method, the pure titanium plate can be made to be short in production procedure, high in efficiency and good in deep drawing performance.

The invention discloses sheet enamel steel for subway decoration and a production method thereof. The thickness of the sheet enamel steel is 1.0 to 2.0mm, wherein the sheet enamel steel comprises the following chemical components in percentage by weight: 0.001 to 0.003 percent of C, less than or equal to 0.10 percent of Si, 0.05 to 0.10 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.005 percent of S, 0.01 to 0.02 percent of Als, 0.20 to 0.25 percent of Ti, 0.010 to 0.020 percent of N and the balance of Fe and inevitable impurities. The production method of the sheet enamel steel for the subway decoration comprises the following steps: carrying out desulfurization on molten iron, combined blowing on the top and bottom of a converter, continuously casting plate blanks, soaking through a soaking pit furnace, hot continuous rolling, controlled rolling and controlled cooling, reeling, washing with acid, detecting quality, processing and forming, shot blasting, washing with alkaline, spraying enamel and firing enamel. Through the hot rolled enamel steel, the excellent cooperation of high strength and high deep-drawing property is achieved; the enamel steel is liable to form and weld, low in production cost, high in efficiency and wide in application prospect.

A corrosion-proof brass band for plate heat exchanger and its production are both disclosed herewith. It contains (wt%): Cn 76-79, Al 1.0-3.5, Ni 0.3-1.5, B 0.002-0.015, As 0.01-0.1, Ce 0.05-0.2, and balanced with Zn, and with impurity not more than 0.3. It is produced by: weighing, smelting, casting, hot rolling, end-surface milling, primary rolling, inter-annealing, cold rolling, inter-annealing, edge cutting, pre-rolling, inter-rolling, fine rolling, final annealing, surface treating, cutting, and packing. It is of size (0.4-8.5mm)X(300-1000mm)X(500-3000mm), performance of Rm not less than 410MPa, A11.3 not less than 40%, Hv1 not less than 90, grain 0.010-0.030mm, and Ra larger than 0.2um without scratches.