615 results about "Continuous annealing" patented technology

The invention discloses a nodular cast iron pipe continuous annealing furnace temperature distribution optimization control system and method, and belongs to the technical field of temperature control, and the system comprises a temperature detection module, a data processing module, a control module and a fault diagnosis module; the temperature detection module is used for collecting temperature data in the nodular cast iron pipe annealing furnace in real time; the data processing module is used for preprocessing and analyzing the collected temperature data and constructing a temperature distribution model; the control module comprises a temperature optimization unit and an energy optimization unit; the temperature optimization unit is used for calculating the temperature adjustment amount according to the real-time temperature distribution condition in the furnace in the length direction, the radial direction and the circumferential direction, and formulating a partition heating and local compensation strategy; the energy optimization unit is used for dynamically adjusting the heating power according to the change of the production takt, and generating a dynamic heating strategy; the fault diagnosis module is used for monitoring the operation state of the nodular cast iron pipe annealing furnace in real time and conducting fault detection.

The invention belongs to the field of metal materials, and particularly relates to high-elongation and high-forming passenger car steel and a production method thereof.The steel plate is mainly suitable for manufacturing passenger car structural parts, the steel comprises the following chemical components of C, Si, Mn, Al, V, Ta, Bi, Sb, Ni, Pt and Y, P is limited to be smaller than or equal to 0.015%, S is limited to be smaller than or equal to 0.005%, N is limited to be smaller than or equal to 0.006%, and the balance Fe and inevitable impurities. The steel plate is obtained by adopting hot rolling, EPS, continuous annealing and finishing processes, the processes of pickling and cold rolling are reduced, the production process is simplified, the production cost is reduced, and the environment is not polluted.

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 relates to the technical field of advanced high-strength steel for automobiles. The invention relates to cold-rolled dual-phase steel DP780 with low cost and high surface. The cold-rolled dual-phase steel DP780 comprises the following chemical components in percentage by mass: 0.10 to 0.15 percent of C, 0.20 to 0.40 percent of Si, 1.60 to 1.80 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.004 percent of S, 0.015 to 0.035 percent of Al, 0.010 to 0.025 percent of Ti, 0.005 to 0.015 percent of Nb, less than or equal to 0.006 percent of N, less than or equal to 0.0003 percent of H and the balance of iron and inevitable trace impurities. The invention further provides a production method of the low-cost high-surface cold-rolled dual-phase steel DP780. The production method comprises the technological processes of smelting, continuous casting, casting blank reheating, rough rolling, finish rolling, cooling and coiling after rolling, hot coil acid continuous rolling and rolled hard coil continuous annealing. The 780MPa-grade cold-rolled dual-phase steel has the beneficial effects that the 780MPa-grade cold-rolled dual-phase steel which is small in alloy adding amount and easy to control steelmaking casting, hot rolling and continuous annealing can be stably obtained, and the use requirements of automobile parts are met.

The invention relates to the technical field of advanced high-strength steel for automobiles. The invention relates to cold-rolled dual-phase steel DP980 with low cost and high surface. The cold-rolled dual-phase steel DP980 comprises the following chemical components in percentage by mass: 0.07 to 0.10 percent of C, 0.30 to 0.60 percent of Si, 2.00 to 2.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.003 percent of S, 0.015 to 0.035 percent of Al, 0.010 to 0.040 percent of Nb, 0.010 to 0.040 percent of Ti, 0.10 to 0.30 percent of Cr, less than or equal to 0.006 percent of N, less than or equal to 0.0003 percent of H and the balance of iron and inevitable trace impurities. The invention provides a production method of low-cost high-surface cold-rolled dual-phase steel DP980. The production method comprises the technological processes of smelting, continuous casting, casting blank reheating, rough rolling, finish rolling, cooling and coiling after rolling, hot coil acid continuous rolling and rolled hard coil continuous annealing. The 980MPa-grade cold-rolled dual-phase steel has the beneficial effects that the 980MPa-grade cold-rolled dual-phase steel which is small in alloy adding amount and easy to control steelmaking casting, hot rolling and continuous annealing can be stably obtained, and the use requirements of automobile parts are met.

The invention belongs to the field of metal materials, and particularly relates to high-strength passenger car steel and a production method thereof.The steel plate is mainly suitable for manufacturing passenger car structural parts, the steel comprises the chemical components of C, Si, Mn, Al, Nb, V, Ta, Bi, Sb, Ni, Cr, Pt and Y, P is limited to be smaller than or equal to 0.015%, S is limited to be smaller than or equal to 0.005%, N is limited to be smaller than or equal to 0.006%, and the balance Fe and inevitable impurities. The steel plate is obtained by adopting hot rolling, EPS, continuous annealing and finishing processes, the processes of pickling and cold rolling are reduced, the production process is simplified, the production cost is reduced, and the environment is not polluted.

The invention provides an online detection and compensation method for local decarburization of a high-strength spring steel band, which comprises the following steps: arranging an oxygen content sensor in a continuous annealing furnace to monitor oxygen concentration in real time, and marking a potential decarburization risk section; scanning the risk section steel strip by adopting infrared thermal imaging, and generating a carbon distribution map to position a decarburization area; pulse laser heating is conducted on the decarburization area, and methane-argon mixed gas is introduced to achieve in-situ carburization; and finally, local thermal stress is eliminated through high-frequency induction heating. According to the method, decarburization risk dynamic early warning, defect accurate positioning, local efficient carbon supplementation and stress homogenization control are achieved, and the surface quality and fatigue performance of the steel strip are remarkably improved.

The invention discloses a near-net-shape endless rolling non-oriented electrical steel ultra-thin strip and a preparation method thereof, and belongs to the technical field of metal processing. According to the method, the near-net-shape endless rolling non-oriented electrical steel ultra-thin strip with the finished product thickness being only 0.05-0.15 mm is prepared through the processes of smelting, thin slab continuous casting, endless rolling hot continuous rolling, coiling, online heat preservation, acid pickling, primary cold rolling and continuous annealing, normalizing and secondary cold rolling annealing are not needed in the process, and short-process, low-cost and efficient production can be achieved. The defects that the surface of the non-oriented electrical steel ultra-thin strip is corrugated, the magnetic performance is poor, the surface is scratched and severely narrowed in the annealing process, iron loss is not easy to control, and energy consumption is high are overcome, and the prepared non-oriented electrical steel ultra-thin strip is excellent in magnetic property and can be applied to high-frequency and high-speed motors. And the development requirements of new energy and low-altitude economy are met.

The invention relates to a normalizing-free method for producing non-oriented electrical steel. The method comprises the following steps: 1) performing multi-pass finish rolling, cooling and coiling on an intermediate billet to obtain a hot-rolled coil plate with the thickness of 2.30-2.60 mm; (2) the hot-rolled coil plate is not subjected to normalizing treatment, but is sequentially subjected to uncoiling, acid pickling, rinsing, drying, cold rolling and coiling, and a cold hard coil with the thickness being 0.35-0.65 mm is obtained; (3) the cold hard coil is subjected to finished product annealing in the mixed atmosphere of H2 and N2 through a continuous annealing furnace, the finished product annealing temperature ranges from 850 DEG C to 1000 DEG C, and the annealing time ranges from 50 s to 70 s; and cooling, coating and finishing the annealed steel strip to obtain a non-oriented electrical steel finished product. The method has the advantages that under the condition that normalizing intermediate annealing is not adopted, the burden of production procedures such as steelmaking and hot rolling can be relieved, the control difficulty of harmful elements and inclusions in the steelmaking link is lowered, and the control difficulty of recrystallization microscopic structures in the hot rolling link is lowered.

The invention relates to the technical field of metallurgy, in particular to a zinc-aluminum-magnesium coating preparation method capable of keeping coating integrity in a corrosion environment, alloy steel with the thickness of 1.8 mm or above is adopted, in the preparation process, a continuous annealing process adopts a three-section heating process, and an after-plating cooling process adopts a three-section variable-temperature cooling process; a plating solution adopted by the zinc-aluminum-magnesium plating layer comprises the following chemical components in percentage by weight: 9-11% of Al, 2.8-3.1% of Mg, less than or equal to 0.1% of rare earth elements, 0.1-0.2% of Si and the balance of Zn and inevitable impurities; according to the invention, the key problems of poor coating structure uniformity, contradiction between scratch resistance and self-repairing capability, limitation of super-thick coating preparation process, insufficient adaptability to extreme corrosion environment and the like of the existing zinc-aluminum-magnesium coating technology in industrial application are solved, and the coating can efficiently keep structural integrity in the industrial corrosion environment, and can be widely applied to the industrial corrosion environment. And meanwhile, the requirements of super-thick coating preparation, complex working condition adaptability and low-cost industrial production are met.

The invention relates to the technical field of titanium material manufacturing, in particular to a tensile titanium alloy wire machining process which comprises the steps that aluminum, vanadium, iron, carbon, nitrogen, hydrogen, oxygen and titanium are put into a vacuum consumable electric arc furnace in proportion to be smelted, and a titanium alloy cast ingot is obtained; the titanium alloy cast ingot obtained after chemical cleaning is heated and forged; the forged blank is rolled and drawn, and the drawn wire is subjected to annealing treatment; collecting the temperature of each position of each temperature area in the continuous annealing furnace at each moment, and determining the thermal diffusion fluctuation of each position in the continuous annealing furnace in each time period; calculating the heat flow coefficient of each position in the continuous annealing furnace in each time period; acquiring proportional parameters of a PID controller in each position and each time period in the continuous annealing furnace, and controlling the temperature of each position by using the PID controller; and the titanium alloy wire is obtained after annealing treatment. The tensile property of the titanium alloy wire is improved.

The invention provides a production method of a cold-rolled titanium steel composite plate coil. Industrial production is achieved through the following steps that S1, the titanium steel composite plate coil is selected as a cold-rolled raw material; s2, removing the titanium layer at the head and the tail of the raw material to expose the steel base material, and welding the steel base material with the stainless steel leading tape; s3, a continuous annealing furnace is adopted for annealing the composite plate coil welded in the step S2, shot blasting is carried out after annealing, and acid pickling is carried out after shot blasting; a reversible reciprocating rolling mill is adopted for rolling, a constant rolling force mode is adopted for cold rolling, the accumulative deformation is controlled to be 50%-75%, and the single pass is smaller than or equal to 15%; s5, degreasing the cold-rolled composite plate coil; s6, carrying out multi-step vacuum annealing on the degreased composite plate coil; s7, flattening the composite plate roll subjected to vacuum annealing; and S8, the flattened composite plate coil is pulled and straightened, and the cold-rolled titanium steel composite plate coil is prepared. According to the method, the continuous production of the cold-rolled titanium steel composite plate coil with good performance can be realized by adopting a conventional production line without first-pass heavy reduction or a special powerful rolling mill.

The invention belongs to the technical field of aluminum-based materials, and particularly relates to a preparation method of a high-performance 1060-O-state aluminum alloy connecting piece. The preparation method comprises the following steps that firstly, a hot-rolled coil is prepared; step 2, preheating treatment; thirdly, a cold-rolled coil is prepared; fourthly, air cushion type continuous annealing is conducted; 5, annealing a finished product in the box-type furnace; and step 6, slitting a finished product. According to the method, the problems of low production efficiency, poor comprehensive performance and high energy consumption when the O-state aluminum alloy connecting piece is prepared by adopting a single box-type furnace annealing process are solved, high-efficiency, high-consistency and low-energy-consumption production is realized, and the prepared connecting piece has stable low strength and high ductility and is suitable for large-scale production. And the application requirements of new energy automobiles and energy storage battery modules can be met.

The invention belongs to the field of metal materials, and particularly relates to 1430MPa-grade steel for passenger cars and a production method of the 1430MPa-grade steel, and the steel plate is mainly suitable for manufacturing passenger car structural parts. The steel comprises the following chemical components: C, Si, Mn, Al, Nb, V, Ta, Bi, Sb, W, Cr, Pt, Zr and Y, Al / Si is 1.0-2.0%, Ta + Zr is 0.040-0.048%, 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 0.006%, and the balance is Fe and inevitable impurities. The steel plate is obtained through the hot rolling, EPS, continuous annealing and finishing processes, the pickling and cold rolling processes are omitted, the technological process is simplified, and the environment is not polluted.

The invention discloses a nonlinear model predictive control method for the strip steel temperature of a continuous annealing furnace, and relates to the technical field of metallurgical industry automation control, and the method comprises the following steps: collecting historical data in the production process of the continuous annealing furnace; a nonlinear autoregression exogenous input model based on Sigmoid-ARX is established; the model parameters are optimized through a Levenberg-Marquardt algorithm, and the model parameters are optimized through the Levenberg-Marquardt algorithm; based on the optimized Sigmoid-ARX model, designing a nonlinear model prediction controller, performing local linearization near a given working point, and converting a nonlinear optimization problem into a quadratic programming problem; by constructing the Sigmoid-ARX nonlinear model and the predictive control capability and system-level constraint processing characteristics of the model predictive control algorithm, the strip steel temperature predictive precision is improved, stable control over strip steel of different specifications in the transition stage is achieved by optimizing the control strategy, the standard deviation of the strip steel temperature and speed is reduced, and the stability of the strip steel temperature and speed is improved. The average speed of a production line is improved, and the yield is increased.

The invention discloses a production process of high-strength anti-distortion cold-rolled strip steel. The production process comprises the links of raw material preparation, cold rolling, heat treatment, surface treatment and quality detection. Selecting medium-carbon steel with specific components as raw materials, and controlling the tolerance of hot-rolled strip steel; a six-roller unit is adopted for multi-pass rolling in cold rolling, and a plate shape control technology is matched; continuous annealing and gradient quenching-isothermal tempering are applied to heat treatment, so that a specific structure gradient is formed, and the distortion rate is reduced; the surface is subjected to acid pickling, hot galvanizing and a nano ceramic composite coating, so that the corrosion resistance and the wear resistance are improved; and the quality is guaranteed through online detection and sampling inspection. The strip steel produced through the technology is high in strength, good in toughness, high in corrosion resistance and suitable for the high-requirement field.

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 a production method of thin cold-rolled strip steel for food cans, which comprises the following steps of: smelting molten steel according to preset smelting components, and continuously casting after smelting; the casting blank subjected to continuous casting enters a hot rolling procedure, the final rolling temperature of the casting blank corresponds to the carbon content, and finally hot-rolled strip steel with the thickness of 2.0-2.3 mm is obtained; hot-rolled strip steel enters a rolling procedure after being subjected to acid rolling uncoiling, a five-rack rolling mode is adopted for acid rolling, and the total reduction rate is controlled to be 91%; coiling and then entering a continuous annealing process; in the annealing furnace, the annealing temperature and the strip steel speed are in a proportional relation, and finally finished strip steel is obtained. The thin-gauge strip steel can be produced at a high cold rolling speed, meanwhile, vibration of the rolling mill is effectively relieved, the production cost is reduced, and the product quality is not affected.

The invention discloses a 1180MPa-grade ultrahigh-strength steel plate for an automobile and a preparation method of the 1180MPa-grade ultrahigh-strength steel plate, and belongs to the technical field of cold-rolled strip production. The steel plate comprises the following chemical components in percentage by mass: 0.17%-0.20% of C, 1.2%-1.6% of Si, 1.70%-2.10% of Mn, less than or equal to 0.008% of P, less than or equal to 0.005% of S, 0.30%-0.50% of Al, 0.15%-0.30% of Cr, 0.08%-0.12% of V, less than or equal to 0.0045% of N and the balance of Fe and impurities, wherein Ceq = C + Si / 30 + Mn / 20 + 2P + 4S < = 0.41. The preparation method comprises the steps of smelting, continuous casting, hot rolling, pickling cold rolling and continuous annealing. Through alloy component design and process collaborative optimization, the prepared ultrahigh-strength steel plate has high strength, high plasticity and high reaming performance, and the problem that existing bainite complex-phase steel is poor in comprehensive performance can be effectively solved.

The invention discloses an alloyed hot-dip galvanized steel sheet, a substrate of the alloyed hot-dip galvanized steel sheet contains 0-1.0% by mass of Si, the average Fe content in an alloyed hot-dip galvanized layer of the alloyed hot-dip galvanized steel sheet is 7-10% by mass, and the surface phase structure of the alloyed hot-dip galvanized layer contains a columnar zinc-iron alloy phase, the ratio R of the length to the width of the columnar zinc-iron alloy phase is greater than or equal to 2 and less than or equal to Rlt; 7. The pulverization grade of the alloyed hot-dip galvanized steel plate is smaller than or equal to 6 grade, and the pulverization resistance is good. The invention further discloses a manufacturing method of the alloyed hot-dip galvanized steel plate, the manufacturing method is suitable for the low-silicon steel plate, and the alloy phase structure of a steel plate coating is controlled by controlling the air-fuel ratio in the preheating stage in the continuous annealing step, the dew point DP in the soaking stage and the alloying temperature in the alloying step, so that the pulverization resistance of the steel plate is improved.

The invention provides a continuous annealing process method for cooperatively regulating and controlling the shape of an ultrathin and wide precise foil, and relates to the technical field of advanced material processing frontier. According to the continuous annealing process method for synergistically regulating and controlling the shape of the ultrathin and wide precise foil, micron-sized precise foils with different marks, the specification of 0.02-0.2 mm and the width of more than 600mm are selected for continuous annealing, and the preparation process comprises the following steps: putting a cold-rolled and cleaned ultrathin and wide foil coiled material into a continuous annealing furnace for annealing treatment, and the method can be suitable for regulating and controlling the structure properties and the plate shapes of various ultrathin precise foils. The method can effectively control the abnormal growth of crystal grains, realizes the fine grain structure of the foil, improves the surface quality and the mechanical property of the ultrathin precise foil, fills the technical defects of the plate shape consistency and the structure property of the ultrathin and wide precise foil after annealing, and has positive significance in promoting the development of the key technical industry in China.

The invention discloses economical high-hardness low-grade aluminum-free non-oriented silicon steel and a preparation method thereof. The economical high-hardness low-grade aluminum-free non-oriented silicon steel comprises the following components in percentage by mass: less than or equal to 0.003% of C, 0.50-0.70% of Si, 0.25-0.65% of Mn, 0.09-0.10% of P, less than or equal to 0.0040% of S, less than or equal to 0.0010% of Al and the balance of Fe and inevitable impurities. On the basis of low-cost aluminum-free high-phosphorus component design, the electromagnetic performance and the mechanical performance are improved by increasing the content of Si, adding and controlling strengthening elements, strictly controlling the process temperature control precision in the hot rolling production process and optimizing the temperature and speed process setting of the continuous annealing process; the high-hardness low-cost aluminum-free non-oriented silicon steel suitable for the high-speed punching machine is produced, so that the aluminum-free non-oriented silicon steel has excellent magnetic characteristics and high hardness, and the requirement of a user for high efficiency in motor stator and rotor punching sheet production is met.

The invention discloses a method for establishing a strip steel buckling phenomenon prediction model in a continuous annealing process, which relates to the technical field of ferrous metallurgy and comprises the following steps: acquiring parameters of a strip steel heating section and a soaking section in the continuous annealing process; the parameters comprise equipment parameters and process parameters; constructing a strip steel transverse temperature distribution model; constructing a strip steel yield stress model; constructing a strip steel tensile stress distribution model; constructing a strip steel transverse pressure stress distribution model; constructing a strip steel buckling wrinkle criterion; correcting a model coefficient based on field measured data; according to the method, the strip steel operation process of the heating section and the soaking section is divided into different research units and strip steel bar elements, the whole-process strip steel buckling phenomenon prediction in the continuous annealing process can be achieved, and the real condition of strip steel buckling under the thermal-mechanical coupling effect in the continuous annealing process can be reflected more accurately and more reliably.

The invention discloses a short-process preparation method of a palladium-silver-copper alloy wire with high palladium content, which comprises the following steps: 1) smelting, blowing out, refining and casting silver, copper and palladium to obtain a palladium-silver-copper master alloy ingot; 2) continuously casting the palladium-silver-copper master alloy ingot into a palladium-silver-copper alloy rod; (3) the palladium-silver-copper alloy rod is continuously rolled, and the total deformation of the palladium-silver-copper alloy rod is controlled to range from 60% to 80% till a palladium-silver-copper alloy thick wire is obtained; and 4) carrying out continuous annealing and drawing on the palladium-silver-copper alloy thick wire to obtain the palladium-silver-copper alloy wire with the diameter of 0.1-0.8 mm. By the adoption of the method, the palladium-silver-copper alloy rod with the good machining performance can be prepared, alloy wires with the tensile strength higher than 1200 MPa and the Vickers hardness larger than 350 HV can be continuously produced in batches, the cleanliness and splatability of the alloy wires both meet the first-level / A-level requirements, and meanwhile the production period is only 30% of that of a traditional technology.

The invention belongs to the field of metal materials, and particularly relates to 1285MPa-grade passenger car steel and a production method thereof, the steel comprises the following chemical components: C, Si, Mn, Al, Nb, V, Ta, Bi, Sb, W, Cr, Pt, Zr and Y, the Al / Si is 1.0-2.0, the Ta + Pt is 0.020-0.030%, 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 0.006%, and the balance is Fe and inevitable impurities. The steel plate is obtained by adopting the processes of hot rolling, EPS, continuous annealing and finishing, the production process is simplified, and environmental pollution is avoided.

The invention discloses continuous annealing equipment and an annealing process for round steel bar annealing, and relates to the technical field of metal heat treatment equipment and processes, the continuous annealing equipment comprises an annealing furnace barrel, an annealing box heating pipe and a base, one side face of the annealing furnace barrel is fixedly communicated with an annealing box, and a public self-driving assembly is arranged in the annealing box. The rotary cylinder and the supporting disc are driven through the public self-driving assembly, the round steel bars are kept to rotate synchronously before and after entering the annealing box, continuous circulation and rotary annealing are achieved, compared with traditional stacking annealing, the round steel bars on the inner side of a material pile can also fully absorb heat, and therefore the problems that temperature distribution is uneven, and temperature rise of part of the steel bars is too slow are solved; therefore, the uniform annealing effect of each round steel bar is guaranteed, the internal structure uniformity, the hardness stability and the subsequent machining performance of the product are remarkably improved, and the machining safety and reliability of the material are improved.

The invention belongs to the field of metal materials, and provides 1200 MPa-grade alloyed galvanized complex phase steel with ultrahigh reaming performance for automobiles and a preparation method thereof, the steel comprises the following components in percentage by weight: 0.15 to 0.23 percent of C, 1.30 to 2.50 percent of Mn, 0.40 to 0.9 percent of Si, 0.01 to 0.03 percent of Al, 0.002 to 0.004 percent of B, 0.020 to 0.040 percent of Ti and 0.010 to 0.030 percent of Nb, and the sum of Ti and Nb is required to be greater than or equal to 0.040 percent and less than or equal to 0.065 percent; the steel comprises the following components in percentage by weight: 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 The preparation method comprises the steps of smelting, hot rolling, acid pickling, cold rolling, continuous annealing galvanizing and finishing. The steel plate has good forming performance while achieving high reaming performance.

The invention relates to a control method for improving EDT roller texturing efficiency and high-surface automobile aluminum plate oil storage amount. The control method comprises the steps that (1) a single-rack cold rolling mill is adopted; (2) carrying out roller surface treatment by adopting an electrode electric spark roller grinder, wherein the roughness Ra of a working roller before roughening is less than or equal to 0.4 mu m; the roughness Ra after EDT roughening is equal to 1.95 to 2.2 [mu] m; (3) a single-rack cold rolling mill is adopted for production, the rolling oil temperature is 35 + / -5 DEG C, and the rolling oil pressure is 6.0-9.0 bar; (4) an air cushion type continuous annealing line is adopted for cleaning and solid solution aging treatment; (5) carrying out surface appearance and pit size measurement on the prepared aluminum plate by adopting a 3D optical microscope; and (6) the manufactured aluminum plate is measured through a 3D non-contact optical contourgraph. By means of the method, the requirements for the surface roughness Ra and Rpc of the automobile sheet can be met, the downstream stamping cracking risk and the corrosion spot defect caused by the too large surface pit diameter are reduced, the better high-surface automobile sheet, the higher aluminum sheet surface oil storage amount and the lower friction coefficient can be obtained, and the EDT roller texturing working time can be saved.

The embodiment of the invention provides a preparation method of a titanium foil strip with high elongation and good surface microcosmic quality. The preparation method comprises the steps that a sponge titanium raw material is smelted and machined through a primary electron beam cold hearth smelting furnace; the titanium metal plate blank is coated with an anti-oxidation coating to form an anti-oxidation coating; the titanium metal plate blank coated with the anti-oxidation coating is subjected to heating, heat preservation, hot rolling and continuous annealing shot blasting acid pickling treatment; the hot-rolled titanium coil is subjected to first-rolling-process cold rolling, and continuous annealing, shot blasting and acid pickling are conducted after cold rolling; carrying out multi-rolling-process cold rolling and semi-finished product annealing by adopting a cold rolling unit and an argon protection cover type furnace; carrying out finished product rolling on the annealed master tape by adopting a cold rolling unit; performing finished product heat treatment on the titanium strip by adopting an argon shield continuous annealing furnace; and straightening the annealed titanium strip by adopting a tension straightening machine. According to the embodiment of the invention, the titanium foil strip with high elongation and good surface microcosmic quality is obtained, and the prepared titanium foil strip is excellent in forming performance and surface microcosmic quality.

The invention belongs to the field of metal materials, and particularly relates to ultrahigh-strength steel for a passenger car and a production method of the ultrahigh-strength steel, and the steel plate is mainly suitable for manufacturing structural parts of the passenger car. The steel comprises the following chemical components in percentage by weight: 0.006 to 0.010 percent of C, Si, Mn, Al, Nb, V, Ta, Bi, Sb, Ni, Cr, Pt, Zr, 0.006 to 0.010 percent of Y, 1.0 to 1.8 percent of C / V, 0.014 to 0.026 percent of Ta + Pt, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of N and the balance of Fe and inevitable impurities. The steel plate is obtained through the hot rolling, EPS, continuous annealing and finishing processes, the pickling and cold rolling processes are omitted, the production cost is low, and the environment is not polluted.