357 results about "Formability" patented technology

The invention discloses a 340MPa grade P-containing hot-dip galvanized iron alloy high-strength IF steel, the chemical composition of which is as follows by weight: C: ≤0.003%, Si: ≤0.03%, Mn: 0.35-0.65%, P: 0.03-0.075%, S≤0.010%, Als: 0.020-0.045%, Nb: 0.008-0.015%, Ti: 0.02-0.03%, B: 0.0004-0.0010%, N≤0.0035%, and the remainder is Fe and unavoidable impurities; The elements also meet the following restrictions: calculated according to the corresponding weight percentage of each element, 10C+3N+2S≤Ti+2Nb≤12C+3N+2S, 60B≤P≤80B; the present invention adds P element to IF steel, and through composition and process optimization control, obtains a P-containing hot-dip galvanized iron alloy high-strength IF steel with a yield strength of 180-320 MPa, a tensile strength of 340-440 MPa, an elongation of 35-46%, a value (average plastic strain ratio) ≥1.8, high surface quality, high formability, and good cold brittleness.

The invention provides a laser-assisted rolling forming method and device for reducing springback of a high-strength metal part, and the method comprises the steps that the motion trail of a rolling tool head is designed according to the shape of a target part, and the rolling tool head rolls a to-be-machined part according to the motion trail until the target part is formed; a laser head is fixedly installed on one side of the rolling tool head, during rolling forming, the local bending area of the to-be-machined part is heated, the material forming performance is improved, and meanwhile the forming load is reduced so as to reduce springback. According to the laser-assisted rolling forming method and device for reducing resilience of the high-strength metal part, the laser head emits the laser to preheat the to-be-machined part, the to-be-machined part is subjected to rolling forming in cooperation with the rolling tool head, the to-be-formed local area is softened, and the resilience of the high-strength metal part is reduced. And the forming load is reduced, so that the high-strength metal part with smaller resilience and higher geometric accuracy is obtained, the operation is convenient, and the machining and forming effect is good.

The invention belongs to the field of metal materials, and particularly relates to high-formability steel for a passenger car and a production method of the high-formability steel, the steel plate is mainly suitable for manufacturing passenger car structural parts, the steel comprises the following chemical components: C, Si, Mn, Al, Ti, Ta, Bi, Sb, Ni, Pt and Y, P is limited to be less than or equal to 0.015%, S is limited to be less than or equal to 0.005%, N is limited to be less than or equal to 0.003%, and the balance is Fe and inevitable impurities. The steel plate is obtained by adopting hot rolling, EPS, continuous annealing and finishing processes, the processes of acid pickling and cold rolling are reduced, the production process is simplified, and the environment is not polluted.

The invention discloses a stamping method, device and equipment for an alloyed hot-dip galvanized steel plate and a medium, and belongs to the technical field of metallurgy. The method comprises the steps that a simulation draw bead is used for conducting stamping simulation on a target steel plate, the simulation plastic strain value of the target steel plate is obtained, and the target steel plate is an alloyed hot-dip galvanized steel plate; if the simulation plastic strain value is not within the preset initial strain value range, simulation parameters of the simulation draw bead are adjusted until the simulation plastic strain value is within the initial strain value range, and simulation formability parameters of a simulation part obtained after stamping simulation are obtained; if the simulation formability parameters meet the preset requirements, the adjusted simulation parameters serve as target parameters; and performing real stamping on the target steel plate by using the real draw bead with the real parameter as the target parameter. According to the method, the real parameters of the real draw bead of the stamping target steel plate can be obtained through simulation, and parts obtained through stamping by using the real parameters have few wrinkles or cracks.

The invention discloses a method suitable for improving the structure uniformity of an AZ-series magnesium alloy manufactured through an electric arc additive. The method comprises the steps that firstly, a hot-rolled AZ31 plate is selected as a base plate; 2, performing three-dimensional modeling and slicing treatment according to a target magnesium alloy workpiece, and designing a deposition path; 3, preheating the substrate, adjusting the distance between the electrode and the substrate, and introducing protective gas; and fourthly, according to the deposition path, electric arc additive manufacturing is conducted in an inner layer rotating deposition mode, and the AZ series magnesium alloy workpiece is obtained. Plasma arc welding is used as a heat source, the preparation speed is high, heat input control is accurate, the arc stiffness is good, splashing is effectively reduced, and the workpiece formability is good; a rotary deposition mode is adopted, thermal circulation is effectively controlled, abnormal structure growth is avoided, meanwhile, the means of interlayer hammering deformation is assisted, a deposition interface is optimized, the obtained AZ series magnesium alloy workpiece is uniform in structure, fine in grain, few in defect and excellent in strength and plasticity, and the process is simple and easy to popularize.

The invention belongs to the field of metal materials, and provides 800MPa-grade alloyed galvanized complex phase steel with ultrahigh reaming performance for automobiles and a preparation method of the 800MPa-grade alloyed galvanized complex phase steel, and the steel plate comprises the following components in percentage by weight: 0.12%-0.17% of C, 1.90%-2.25% of Mn, 0.30%-0.65% of Si, 0.020%-0.040% of Ti, less than or equal to 0.030% of P, less than or equal to 0.002% of N, less than or equal to 0.005% of S and the balance of Fe and inevitable impurities. The preparation method comprises the steps of smelting, hot rolling, acid pickling, cold rolling, continuous annealing galvanizing and finishing. The microstructure of the steel plate produced by the method is mainly composed of bainite and tempered martensite, and the steel plate has ultrahigh hole expansion rate and excellent forming performance.

The invention relates to the technical field of high-strength steel plate production, in particular to a high-strength storage tank steel plate with high and low temperature impact toughness and a manufacturing method, and the steel plate comprises the following chemical components: 0.16%-0.18% of C, 0.15%-0.32% of Si, 0.93%-1.14% of Mn, less than or equal to 0.015% of P, less than or equal to 0.01% of S, 0.051%-0.12% of Cr, 0.06%-0.08% of Mo, 0.011%-0.023% of Nb, 0.0049%-0.011% of Ta, 0.020%-0.045% of Alt and the balance of Fe and impurities. By matching with a production process of molten iron spheroidizing inoculation treatment, optimized two-stage rolling and efficient short-time heat treatment, the finished steel plate has high strength, good low-temperature toughness and formability and excellent plate shape; and meanwhile, good structure uniformity and good corrosion resistance are achieved.

The invention belongs to the technical field of metallurgy, and particularly relates to a hot-dip galvanized dual-phase steel plate which comprises the following chemical components in percentage by mass: 0.10%-0.20% of C, 0.5%-1.0% of Si, 1.8%-2.5% of Mn, less than or equal to 0.080% of P, less than or equal to 0.010% of S, 0.030%-0.060% of Alt, 0.2%-0.6% of Cr, 0.025%-0.035% of Nb, 0.010%-0.025% of Ti, 0.0020%-0.0030% of B, less than or equal to 0.0040% of N and the balance of Fe and inevitable impurities. The niobium microalloying is combined with the process design, so that the high elongation and the high hole expansion rate of the high-strength steel are both considered in a wide strength range, the overall forming performance and the local forming performance of the hot-dip galvanized dual-phase steel are improved at the same time, and the requirements of light weight for vehicle body complex structural parts and personalized use are met.

The invention discloses cold-rolled DH980 steel with excellent rebound resilience resistance and a preparation method of the cold-rolled DH980 steel. The cold-rolled DH980 steel comprises 0.05%-0.15% of C, 0.5%-1.5% of Mn, 0.1%-1.0% of Si, 0.02%-6.0% of Al, 0.4%-1.0% of Cr, 0.2%-1.0% of Mo, 0.5%-1.20% of Ni, less than or equal to 0.01% of P, less than or equal to 0.01% of S, less than or equal to 0.005% of N, 0.005%-0.50% of Mg, 0.01%-0.50% of Nb, 0.01%-0.50% of V, more than or equal to 1.0% and less than or equal to 6.0% of (Al + Si) and the balance Fe and inevitable impurities. Through component design and cooperation with electric furnace smelting, continuous casting and rolling and continuous annealing, the prepared steel material gives consideration to resilience resistance, high plasticity and high formability, and meets the requirements of resilience resistance, high strength, high plasticity and excellent formability of automobiles.

A kind of titanium alloy plate local heat / electricity / ultrasonic multi-field coupling assisted progressive forming device and its use method, relate to a kind of titanium alloy plate progressive forming device and its use method.The present application is to solve the technical problems of the existing titanium alloy plate progressive forming method relatively slow heating speed, high energy consumption, poor product quality.The device of the present application realizes two-stage heating by local non-contact heating and pulse current self-resistance heating, improves the heating rate, improves the material plasticity by the "electroplasticity" effect generated by pulse current, reduces the material deformation resistance by the "ultrasonic softening" effect generated by ultrasonic field, improves the formability, and improves the forming quality by multi-field coupling.The present application realizes the reduction of material deformation resistance and plasticity by the coupling of heat, electricity and ultrasonic multi-energy field in the deformation process of sheet metal, and significantly improves the formability of material.

The invention belongs to the technical field of material forming and manufacturing, and discloses a hot gas expansion-explosion composite forming method for forming a complex deep-cavity thin-wall component. According to the hot air expansion-explosion composite forming method, a mold unit, an air pressure loading unit and an explosion unit are needed; the method comprises the following steps: mold preheating; feeding and die assembly are carried out; compressed air is filled, and pre-expansion is carried out; fuel is sprayed, and explosion forming is conducted; releasing pressure; and opening the mold and taking the part. The method has the advantages that hot gas bulging forming utilizes metal high-temperature plasticity and evenly-distributed flexible air pressure loading, and the plate forming performance is improved; explosive forming has a very high deformation rate, high plastic deformation can be achieved within a very short time, and the forming performance of the plate can be further improved through the combined action of the strain rate effect and the inertia force. According to the method, the plastic deformation capacity of the material can be remarkably improved by combining the two, and forming of the complex deep-cavity thin-wall component is facilitated.

The present invention designs a high-strength aluminum-erbium alloy for additive manufacturing and a preparation method thereof. The alloy contains: 4-20wt% erbium (Er); 2-10wt% magnesium (Mg); less than or equal to 1wt% manganese (Mn); optionally, 0-1wt% scandium (Sc); optionally, 0-1wt% zirconium (Zr). The present invention aims to simultaneously improve the alloy's forming performance and mechanical properties. Based on the phase diagram calculation method to assist in alloy composition design, the Al-Er eutectic system is selected, the solidification range is reduced, and a fine-grained phase is formed, thereby achieving the technical effects of refined structure, no thermal cracks, and excellent printing performance. In particular, a continuous cellular L12Al3Er eutectic network structure with plastic deformation ability is introduced, with a size of hundreds of nanometers, which is both strengthened and toughened. The aluminum-erbium alloy has both excellent print formability and comprehensive mechanical properties, and the preparation method is mature, low-cost, and highly efficient, and can be produced on a large scale industrially.

The invention discloses a 420MPa-grade steel strip for a high-corrosion-resistance photovoltaic support based on Ti microalloying and low-aluminum high-magnesium coating synergistic reinforcement and a preparation method of the 420MPa-grade steel strip, and relates to the technical field of metal materials. Aiming at the requirements of a distributed photovoltaic bracket, a microalloy component taking a Ti element as a core is designed, and the microalloy component is matched with a low-aluminum high-magnesium micro-titanium coating system to prepare the 420MPa-grade steel belt for the high-corrosion-resistance photovoltaic bracket, which is based on Ti microalloying and low-aluminum high-magnesium coating synergistic reinforcement and has balanced performance and good corrosion resistance. And meanwhile, controlled rolling and controlled cooling and low-temperature annealing are adopted in the preparation process, so that the problem of poor formability of traditional steel is solved, energy consumption is reduced by utilizing a low-temperature rapid plating process, and the production efficiency is improved. While the alloy cost is reduced, balanced optimization of strength-corrosion resistance-forming-welding performance is achieved, and low cost and greenization of a photovoltaic support material are promoted.

The invention relates to 750MPa-grade high-strength steel with high comprehensive formability and a preparation method, and belongs to the technical field of steel preparation. The high-strength steel comprises the following chemical components in percentage by mass: 0.04%-0.08% of C, less than or equal to 0.2% of Si, 1.4%-2.0% of Mn, less than or equal to 0.01% of P, less than or equal to 0.005% of S, 0.02%-0.05% of Al, 0.02%-0.06% of Nb, 0.08%-0.15% of Ti, 0.1%-0.3% of Mo, less than or equal to 0.004% of N and a matrix element Fe, the microstructure of the high-strength steel comprises, by volume fraction, 60%-80% of ferrite and 20%-40% of bainite. Through reasonable component design, a metallographic structure of a target proportion is obtained, so that the obtained high-strength steel has relatively high elongation and hole expansion rate, and has excellent comprehensive forming performance.

The invention relates to a composite casing flange edge forming method, which comprises the following steps of: providing a forming mold with an R-region forming surface according to a target structure of a composite casing flange edge, and determining the minimum radius of a prepreg paving layer in an R region according to the thickness of a composite material and the formability of a prepreg; providing a paving cover plate which is not smaller than the minimum radius of the outer convex surface of the R area, filling prepreg rhodomyrtus tomentosa strips between the paving cover plate and the forming surface, performing preforming to obtain an R area preformed part, moving out the paving cover plate, paving prepreg on the surfaces of the R area preformed part and the R area forming surface to obtain a composite material preform, and performing curing forming to obtain the composite material. And connecting the R-region preform and the composite material preform into a whole to obtain a finished part.

The invention provides a thermal field assisted laser additive manufacturing high-radiation-resistance tungsten-based composite material and an integral forming method thereof. The tungsten-based composite material is composed of TiC ceramic particles, rare earth oxide Y2O3 and metal W. W powder and nano TiC and Y2O3 powder are mixed through a ball milling process to obtain tungsten composite powder, and the tungsten composite powder is formed through a thermal field assisted laser additive manufacturing process. In the additive manufacturing process, due to the high thermal conductivity, tungsten has the high solidification speed, large residual stress is generated, and cracks are generated. And a beam of laser is added to assist the thermal field, so that the cooling speed of tungsten in the forming process can be reduced, and the forming performance of tungsten is improved. And meanwhile, due to the addition of the second-phase particles, grains are effectively refined, the ductile-brittle transition temperature of tungsten is reduced, the brittleness of tungsten is improved, the radiation resistance of tungsten is remarkably improved, and the requirement for material-function integration of the tungsten-based composite material is met.

The application discloses a high-strength steel part hot stamping forming method, and solves the problem of considering strength and plasticity of a steel plate part. The hot stamping forming method comprises the following steps: heating a plate to complete austenitization and rapid precooling; secondary heating and holding: the pre-cooled plate is heated and held again, the temperature is 500-800 DEG C, and the time is 30-180 s, so that the plate enters a diffusion phase change zone, part of the austenite is converted into ferrite or bainite (soft phase), at this time, the plate has good formability and small deformation resistance; the plate is rapidly transported to a die and formed and quenched, at this time, the remaining austenite is converted into martensite (hard phase), the strength of the part is increased; finally, the die is opened, and the part is taken out. The application adjusts and controls the temperature and time in the hot forming process, can meet the double indexes of the strength and plasticity of the part, controls the component proportion of the soft phase and the hard phase, and can realize the accurate control of the strength and elongation of the final part.

The present invention provides a high-strength steel sheet having a tensile strength of 1180 MPa or higher, and excellent formability, impact resistance, and axial crushing properties. Therefore, the composition, in mass%, includes C: 0.15-0.30%, Si: 0.10-1.50%, Mn: 1.50-4.00%, P: 0.020% or less, S: 0.0020% or less, sol.Al: 0.100% or less, and N: 0.0150% or less. The total content of ferrite and bainite is 10% or less, tempered martensite is 80% or more, retained austenite is 10.0% or less, and fresh martensite is 10% or less. The C concentration in retained austenite is 0.50% by mass or less, and the Fe carbide content is 0.10-0.30% by mass.

A method for producing a steel sheet, the method containing the following successive steps:providing a cold-rolled steel sheet, the chemical composition of the steel containing in weight %: 0.15%≤C≤0.23%, 2.0%≤Mn≤2.8%, 1.0%≤Si≤2.1%, 0.02%≤Al≤1.0%, with 1.7%≤Si+Al≤2.1%, 0≤Nb≤0.035%, 0≤Mo≤0.3%, 0≤Cr≤0.4%, the remainder being Fe and unavoidable impurities,annealing the steel sheet at an annealing temperature TA so as to obtain a structure comprising at least 65% of austenite and up to 35% of intercritical ferrite,quenching the sheet at a cooling rate of at least 20° C. / s from a temperature of at least 600° C. down to a quenching temperature QT comprised between Ms−170° C. and Ms−80° C.,heating the sheet up to a partitioning temperature PT between 350° C. and 450° C. and maintaining the sheet at this temperature for a partitioning time Pt comprised between 80 s and 440 s,immediately cooling the sheet down to the room temperature,the steel sheet having a final microstructure consisting of, in surface fraction:between 40% and 70% of tempered martensite,between 7% and 15% of retained austenite,between 15% and 35% of ferrite,at most 5% of fresh martensite,at most 15% of bainite.

Provided are: a tailored blank material that comprises a joining section with excellent formability and that is formed from metal materials of different strengths; and a method for manufacturing the tailored blank material simply and efficiently. Also provided is a press-molded article for which this tailored blank material is used. This method for manufacturing a tailored blank material is characterized in that one member and another member are joined by linear friction welding and in that the difference between the tensile strengths of the one member and the other member is at least 150 MPa. When the welding pressure applied during the linear friction welding is P, the temperature at which the tensile strength of the one member reaches P is T1 (° C.), and the temperature at which the tensile strength of the other member reaches P is Y2 (° C.), it is preferable for P to be set so that the difference between T1 and T2 is 100° C. or less.

The present invention provides a steel sheet having a tensile strength of 1310 MPa or more and excellent press formability in a steel having a martensite structure as a main body and excellent delayed fracture resistance. The steel sheet is characterized by having a composition consisting of, in mass%, C: 0.12% to 0.40%, Si: 1.5% or less, Mn: 1.7% or less, P: 0.05% or less, S: 0.010% or less, sol. Al: 1.00% or less, N: 0.010% or less, Ti: 0.002% to 0.080%, and B: 0.0002% to 0.0050%, with the remainder being Fe and inevitable impurities, and a metal structure in which the area ratio of a martensite to the entire structure is 95% or more, the length L S of sub-block boundaries in the martensite is 0.5 to 2.0 μm, and the ratio L B / L S of the length L B of the sub-block boundaries to the length L of the block boundaries satisfies a prescribed formula (1), and the tensile strength is 1310 MPa or more.

The application discloses a method suitable for improving the structure uniformity of an arc additive manufacturing AZ series magnesium alloy, and the method comprises the following steps: 1, selecting a hot-rolled AZ31 plate as a substrate; 2, performing three-dimensional modeling and slicing processing according to a target magnesium alloy workpiece, and designing a deposition path; 3, preheating the substrate, adjusting the distance between an electrode and the substrate and inputting a protective gas; and 4, performing arc additive manufacturing in an inner layer rotary deposition mode according to the deposition path to obtain the AZ series magnesium alloy workpiece. The application takes plasma arc welding as a heat source, has the advantages of fast preparation rate, accurate heat input control, good arc stiffness, effectively reduced spatter, good workpiece formability, and the like; the rotary deposition mode is adopted to effectively control heat cycle, avoid abnormal structure growth, and simultaneously adopt an auxiliary interlayer hammering deformation means to optimize a deposition interface, so that the obtained AZ series magnesium alloy workpiece has the advantages of uniform structure, small grain, few defects, excellent strength and plasticity, and the like, and the process is simple and easy to popularize.

This invention relates to the field of aluminum alloy materials technology, specifically to a low-zinc-content 6-series aluminum alloy sheet and its manufacturing method. The components and their weight percentages in the low-zinc-content 6-series aluminum alloy sheet are as follows: Si content 0.90-1.20%, Mg content 0.45-0.65%, Cu content 0.12-0.20%, Zn content 0.05-0.10%, Fe content ≤0.28%, Mn content 0.02-0.20%, Cr content ≤0.10%, Ti content ≤0.15%, containing at least one of In, Cd, La, and Ce, and the total content of In, Cd, La, and Ce is 0.01-0.10%; the content of a single impurity ≤0.03%; the total content of other impurity elements ≤0.1%; and the balance is Al. This 6-series aluminum alloy sheet, with a low zinc content (Zn ≤0.10%), possesses excellent formability, high bake hardening value, and high batch stability.

The present invention relates to a method for regulating the formability of a Ni-Fe-based superalloy by laser melting deposition and a method for preparing a deposited layer. The preparation method includes: evaluating the geometric morphologies of single-layer single-pass, single-layer multi-pass, and multi-layer multi-pass to determine the process conditions of laser melting deposition; incorporating Y2O3 into the Ni-Fe-based alloy powder and performing laser melting deposition to obtain a Ni-Fe-based superalloy laser melting deposited layer. Compared with the prior art, the present invention not only forms a deposited layer with good surface morphology, high density, and no cracks, but also evenly mixes Y2O3 with the Ni-Fe-based superalloy powder by using a ball milling process. By utilizing the role of Y2O3 in purifying the microstructure and refining the grains, the anti-plastic deformation ability of the Ni-Fe-based superalloy deposited layer is enhanced, thereby improving the comprehensive mechanical properties of the deposited layer.

The present invention provides a steel sheet having high strength, high ductility, excellent stretch flange formability, and excellent laser weldability, a member, and a method for manufacturing the same. A steel sheet having a composition consisting of, in mass%, C: 0.06 to 0.25%, Si: 0.4 to 2.5%, Mn: 1.5 to 3.5%, P: 0.02% or less, S: 0.01% or less, sol. Al: less than 1.0%, N: less than 0.015%, the balance consisting of Fe and unavoidable impurities, and having a steel structure in which the polygonal ferrite is 10% or less (including 0%) in area ratio, the tempered martensite is 40% or more, the fresh martensite is 20% or less (including 0%) in area ratio, the carbide in the center of 10 μm 2 or less in number is 3 to 40% of the bainite ferrite, the residual austenite is 5 to 20% in volume ratio, S C≥0.5 / S C≥0.3 × 100 is 20% or more.

The invention relates to the technical field of metal materials, in particular to a 5-series aluminum alloy plate with low-temperature baking hardening response and a preparation method of the 5-series aluminum alloy plate. The content of Zn is 1.5%-3.5%; the content of Cu is 0.3%-1.2%; the content of Mn is 0.1 to 0.3 percent; the content of Cr is 0.03 to 0.15 percent; the content of Zr is 0.05 to 0.15 percent; the content of Ti is 0.01 to 0.10 percent; si content is less than or equal to 0.2%; fe content is less than or equal to 0.25%; the La content is less than or equal to 0.2%; the Ce content is less than or equal to 0.2%; the content of Yb is less than or equal to 0.2%; the balance is Al; the bake hardening response efficiency function phi BH of the 5-series aluminum alloy plate is 0.15-1.2; the steel plate has low yield strength, high elongation, high formability and high sinking resistance, and baking varnish hardening is guaranteed.

The invention provides an evaluation method for rapidly predicting the formability of a plate. The evaluation method comprises the following steps: S1, preparing a standard dumbbell-shaped uniaxial tensile sample; s2, preparing a plane strain tensile sample; s3, performing uniaxial tension on the standard dumbbell-shaped uniaxial tension sample; s4, performing uniaxial tension on the plane strain tensile sample; s5, calculating abscissa and ordinate values of three key feature points in the forming limit curve according to the material thickness t, the first correction coefficient and the second correction coefficient; s6, correcting the numerical value of the ordinate in the key feature point by using the first correction coefficient and the second correction coefficient to obtain a corrected ordinate; s7, drawing a forming limit judgment curve; and S8, the forming limit judgment curve is input into finite element simulation analysis software. The method greatly improves the analysis efficiency and prediction precision of the formability of the sheet metal, is especially suitable for the occasion of forming analysis of metal sheet parts, and widely meets the application requirements of engineering practice and scientific research work.

This invention provides a 5-series aluminum alloy sheet and its preparation method, relating to the field of aluminum alloy technology. The preparation method includes: S1, mixing the metal raw materials of the 5-series aluminum alloy sheet according to a specified ratio and sequentially melting and casting to obtain an aluminum alloy ingot; S2, sequentially subjecting the aluminum alloy ingot to homogenization treatment, hot rolling treatment, first cold rolling treatment, intermediate annealing, and second cold rolling treatment to obtain a cold-rolled sheet; S3, sequentially subjecting the cold-rolled sheet to final annealing, cooling treatment, and straightening treatment to obtain the 5-series aluminum alloy sheet; wherein the Fe element content in the 5-series aluminum alloy sheet is not less than 0.25% by mass, the final annealing temperature is 520~550℃, the final annealing holding time is 10~60s, the final annealing heating rate is 5~15℃ / s, and the cooling rate of the cooling treatment is 8~16℃ / s. The prepared 5-series aluminum alloy sheet exhibits excellent mechanical properties, formability, and surface quality.

The disclosed specification relates to a ferritic stainless steel having improved formability by controlling the average grain diameter through alloy components and manufacturing processes and to a method for manufacturing same. A ferritic stainless steel having improved formability, according to an embodiment, may comprise, in percentage by weight: C: 0.0005-0.02%; N: 0.005-0.02%; Si: 0.01-1.0%; Mn: 0.01-1.0%; P: 0.001-0.05%; Cr: 10.0-30.0%; Nb: 0.05-0.5%; Ti: 0.05-0.5%; and the remainder being Fe and inevitable impurities, wherein an Erichsen height may be 6-50 mm.

The application belongs to the technical field of magnetic material preparation, and particularly relates to a high-saturation low-loss soft magnetic composite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) uniformly mixing first powder and second powder to obtain a mixture; wherein the composition of the first powder comprises iron, silicon and chromium, and the composition of the second powder comprises iron and nickel; (2) mixing the mixture with resin, pressing and heat treating; and the temperature of the heat treatment is not higher than 220 DEG C. The application can prepare a soft magnetic material with high saturation characteristics, low loss and high pressing density, and the soft magnetic material has good formability and is not prone to cracking during heat treatment. The application does not need to go through a relatively complex step such as coating when preparing the high-saturation low-loss material, thereby simplifying the process.