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793results about "Roll force/gap control device" patented technology

Weather resistant steel plate and manufacturing method thereof

The present invention provides a weather resistant steel plate, which comprises components of, by mass percent, 0.02 to 0.10 of C, 0.10 to 0.40 of Si, 1.0 to 1.6 of Mn, less than or equal to 0.025 of P, less than or equal to 0.015 of S, 0.20 to 0.50 of Cu, 0.30 to 0.60 of Cr, 0.10 to 0.50 of Ni, less than or equal to 0.40 of Mo, less than or equal to 0.060 of Nb, less than or equal to 0.060 of V,0.010 to 0.035 of Ti, less than or equal to 0.0030 of B, less than or equal to 0.0050 of Ca, 0.015 to 0.050 of Al, and the balance Fe and other unavoidable impurities. Correspondingly, the present invention also provides a manufacturing method of the weather resistant steel plate. Through reasonable distribution ratio of alloy components, the method provided in the invention can obtain a high-strength and high-toughness weather resistant steel plate with good corrosion resisting performance, high yield strength and tensile strength, and excellent low temperature impact toughness. The steel plate also possesses good weldability, being able to carry out welding without preheating or employ lower preheating temperature welding. The steel plate provided in the invention can be widely applied to large-scale steel structure engineering such as building structures, bridges, etc.
Owner:BAOSHAN IRON & STEEL CO LTD

Dynamic roll gap compensation method during cold continuous rolling flying gauge control

ActiveCN103286142AImprove setting accuracyReduce head thickness deviationRoll force/gap control deviceAutomatic controlModel system
The invention discloses a dynamic roll gap compensation method during cold continuous rolling flying gauge control and belongs to the technical field of automatic control of cold continuous rolling. The method includes a part of roll gap compensation for a welding gap position at the position of a rolling mill inlet front thickness gauge and a part of roll gap compensation for the welding gap position at the positions of all rolling mill outlet thickness gauges. A roll gap adjustment value is determined by a model system of a process computer to a great degree due to the fact that a large part of AGC functions are not introduced during flying gauge control. Therefore, computational accuracy of the model system can directly affect thickness control accuracy during flying gauge control. A practical inlet thickness acquired by using a practical thickness gauge at the position of the rolling mill inlet front thickness gauge is adopted to replace a raw material thickness to improve initial data accuracy for setting a model, and a set value of a roll gap during FGC is corrected according to calculated deviation between a front steel coil roll gap and a back steel coil roll gap so as to improve setting accuracy of the roll gap. More accurate roll force is acquired in the method of dynamic self-adapting at the positions of all the rolling mill outlet thickness gauges, setting accuracy of the roll gap is improved, and then the roll gap value can be compensated during flying gauge control.
Owner:BEIJING SHOUGANG AUTOMATION INFORMATION TECH +2

Titanium alloy TC4 cold-rolled tube and production method thereof

The invention relates to a titanium alloy, in particular to a titanium alloy TC4 cold-rolled tube and a production method thereof. By weight, the composition of the alloy is as follows: the balance of Ti, 5.5 percent to 6.75 percent of Al, 3.5 percent to 4.5 percent of V, less than or equal to 0.1 percent of Fe, less than or equal to 0.1 percent of C, less than or equal to 0.03 percent of N, less than or equal to 0.015 percent of H and less than or equal to 0.15 percent of O. The specification of the TC4 cold-rolled tube is outer diameter multiplied by wall thickness (however, the ratio of the outer diameter to the wall thickness is larger than 2). In the process of cold-rolling the titanium alloy tube, lubricant is added on the inner and the outer surfaces of the tube blank and the semi-finished tube, rolling is then carried out, the tube is annealed in oxygen after each rolling pass, a single edge is inwardly sheared by 0mm to 0.8mm, scale cinder and flaws are completely removed before the last one to two passes, the tube is washed by alkali and acid or acid and then by water and then rolled before a finished product is produced after 1 to 16 rolling passes, the rolled finished product is annealed in oxygen or vacuum, and the annealed finished product is washed by alkali and acid or acid again. The performance of the titanium alloy (TC4) cold-rolled tube is good, the metallographic structure is uniform, and the surface quality of the tube is good.
Owner:忠世高新材料股份有限公司

High-silicon-steel thin belt and preparation method thereof

The invention belongs to the fields of metallurgical technology and material science, and in particular relates to a high-silicon-steel thin belt and a preparation method thereof. High silicon steel is mainly applied to manufacture iron cores in a high-frequency motor, a transformer and a high-frequency choke coil and comprises the following chemical components in percentage by weight: 6.5 percent of Si, 0.01-0.6 percent of Al, 0.4-0.8 percent of Mn, no more than 0.003 percent of N, no more than 0.005 percent of S, no more than 0.01 percent of P, no more than 0.003 percent of O, no more than 0.004 percent of C and the balance of Fe and unavoidable impurities. The content of the impurities and harmful gases is reduced in the high silicon steel by vacuum melting to ensure the purity of molten steel, then, the high silicon steel is cast and rolled with the casting temperature of 1470-1510 DEG C, and the thickness of a cast belt is 1.5-2.0mm; after being taken out of a cast roll, cooling by spraying water, heat insulating and warm rolling are carried out on the cast belt, and finally, a product is obtained by recrystallization annealing. When being used for producing the high silicon steel, the technology of the invention has the advantages of small investment, energy saving, environmental protection, high lumber recovery and good product magnetism.
Owner:NORTHEASTERN UNIV

On-line coordination control method for plate shape and plate thickness of strip tandem hot continuous rolling mill

The invention discloses an on-line coordination control method for the plate shape and plate thickness of a strip tandem hot continuous rolling mill, belonging to the technical filed of hot continuous rolling of sheets and strips. The method is characterized by comprising the following steps: (1) collecting n rack hot continuous rolling mill equipment and rolling schedule parameters; (2) collecting the roll force and the convexity offset value of a last rack plate in situ; (3) calculating the plate shape stiffness of each rack; (4) keeping the thickness of the outlet of the tail rack to be constant; (5) inversely calculating the convexity variable quantity of the mechanical plate of the i rack from the tail rack; (6) calculating the roll force and the variable quality of the thickness of the inlet of the i rack; (7) calculating the thickness of the new inlet and outlet of the i rack; (8) calculating the rolling reduction and adjusted quantity of the i rack; (9) calculating the convexity variable quantity of the outlet plate of the (i-1) rack according to the equi-proportional convexity condition; (10) repeating steps from (5) to (9) to obtain the rolling reduction and adjusted quantities of 2nd to n racks; (11) calculating the rolling reduction and adjusted quantity of the first rack; and (12) carrying out on-line coordination control according to the rolling reduction and adjusted quantities, thereby achieving the purpose of coordination control on the plate shape and plate thickness.
Owner:TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Adaptive control method for increasing thickness precision of finish-rolled band steel by utilizing roll gap

The invention relates to the field of production and control of a finish-rolled band steel, in particular to a method for controlling a thickness of a finish-rolled band steel. An adaptive control method for increasing the thickness precision of a finish-rolled steel band by utilizing a roll gap is characterized in that the method comprises the following steps of establishing a roll gap modification quantity static table which performs indexing according to the layers of band steels; before rolling the band steels, identifying the layer of the current rolling band steel, determining the roll gap modification current value, summing the roll gap modification current value with the zero point modification current values of racks, obtaining a roll gap model learning coefficients of the racks used for rolling setting pre-calculation; after rolling the band steels, detecting the obtained band steel final rolling thickness value and the actual roll gap value of the rack at the finish-rollingend, calculating the values, obtaining the band steel final rolling thickness deviation, the initial roll gap deviation value and the roll gap modification update value, for example, when the layer of the same coil of band steel is different with that of the former coil of band steel, the roll gap modification update value is saved in the roll gap modification quantity static table; and collecting the roller speed, roll gap, rolling force and final rolling thickness actually measured data of each rack, and then performing zero point modification of the roll gap. According to the method provided by the invention, the roll gap modification value and zero point modification are used jointly, so that the adaptive capability of the roll gap model under the condition that the rolling planning specification is variable can be improved, thereby improving the setting precision of the model and realizing accurate control to the thickness of the band steel.
Owner:BAOSHAN IRON & STEEL CO LTD

Slab sickle bending control system and method used for roughing mill

The invention discloses a slab sickle bending control system and a slag sickle bending control method used for a roughing mill, and belongs to the field of mechanical automatic control. The control system comprises a slab width detecting module, two side roller beam leveling modules, a computer control module and a storage unit. The slag width detecting module is used for processing centre line offset data detected by a width detector and sending the processed centre line offset data to the computer control module; the computer control module is used for calculating a leveling value of each gate by collecting a set value of slag and practically measured value data, and sending the leveling value to the two side roller beam leveling modules; and the two side roller beam leveling modules are used for regulating two side roller beams of the roughing mill according to the leveling value, and controlling the slab sickle bending. The control system is applicable on the roughing mill, capable of calculating the leveling value of each gate more accurately, and capable of effectively controlling slag sickle bending and guaranteeing stability of finishing rolling unit production, thereby relieving steel scrap caused by off-tracking, shifting and the like, increasing yield and bringing direct economic benefits for enterprises.
Owner:BEIJING SHOUGANG AUTOMATION INFORMATION TECH

Method for preparing metal layered micro-gradient composite material

The invention discloses a method for preparing a metal layered micro-gradient composite material. The method is mainly characterized in that the micro-gradient composite material is obtained through interface diffusion of alloy elements with the homologous-series heterogeneous multi-layer metal rolling bonding and heat processing technology. Metal with two kinds of alloy content is adopted for rolling bonding, and the to-be-bonded surfaces are grinded and washed; after the ends are fixed, rolling bonding is carried out, and a multi-layer heterogeneous metal composite board is prepared; then heat processing is carried out on the composite board, the temperature is kept for a certain period of time according to requirements, the alloy elements are diffused on interfaces, and therefore the layered micro-gradient composite material is obtained. According to the metal layered micro-gradient composite material prepared with the method, obvious micro-gradients in chemical components and performance exist nearby the interfaces, and the good interface bonding strength can be achieved; the number of the micro-gradient interfaces and the thickness of micro-gradient layers can be adjusted and controlled by changing the rolling bonding technology, the laminating order and the heat processing technology.
Owner:CHONGQING UNIV

Moulding method of magnesium alloy ultrathin sheet material

The invention discloses a molding method of ultra-thin magnesium alloy plank stuff, which firstly carries out heat preservation of magnesium alloy cast ingots at the temperature of 648 to 688 K for 22 to 25 hours under the protection of inert gases, implements the homogenization treatment of ingot blanks, directly cogs the ingot blanks with heat extrude until the total deformation degree of the heat-extruded and cogged ingot blanks reaches over 40 percent and then implements annealing; the molding method trims the plate blanks after the heat-rolled cogging into required width dimension, implements transverse rolling in a thermal treatment status and controls the heat rolling deformation degree between 20 and 30 percent at the first time, implements longitudinal rolling after the middle annealing, and then implements a plurality of times of transverse rolling, longitudinal rolling, repeated transverse rolling and repeated longitudinal rolling in the thermal treatment status with the assisted middle annealing until the thickness of the plank stuff is 1mm; the molding method implements the cold rolling of the plank stuff with the reduction of 5 percent in each pass, the total deformation degree of the cold rolling between two middle annealing is controlled at 30 percent, and the thickness of the plank stuff after the cold rolling is 0.1mm; the molding method finally implements the flattening and the finishing operation of the plank stuff. The plank stuff produced by the molding method of the invention has tiny crystal grains, even tissue, little defects, lessening cardinal area texture, and improving mechanical, corrosion resistant and electrochemical performance, etc..
Owner:CENT SOUTH UNIV

Direct forming manufacturing method of metal-based multilayer/gradient composite board and process unit of direct forming manufacturing method

The invention discloses a direct forming manufacturing method of a metal-based multilayer/gradient composite board and a process unit of the direct forming manufacturing method. Scale, corrosion materials and other impurities on the joint surface of a base board are removed through chemical cleaning, the cleaned surface is subjected to gradient power electromagnetic induction heating or laser bombardment surface treatment, all phases near the joint surface are fully dissolved, a solid solution is enhanced, toughness and corrosion resistance are improved, the surface stress of the board is eliminated, and surface laser treatment is conducted to improve the binding property of a composite layer; raw materials of the composite layer are added and injected through powder laying, a high-energy heat source is adopted for irradiation or induction heating to melt powder, metallurgical bonding is formed between the composite layer and a base, and control over the final shape of a cold/hot-rolled board is conducted. The obtained multilayer/gradient composite board is compact in surface structure, bonding between the composite layer and the base and between layers is good, and the interlayer bonding performance of the composite board is remarkably improved. The process is high in flexibility, and the production period of the metal-based composite board can be greatly shortened after the process is combined with an existing continuous casting technology.
Owner:SHANGHAI UNIV

Method for producing metallic titanium plate using medium-wide strip hot rolling machine set

The invention discloses a method for producing a metallic titanium plate by adopting a medium-wide band heat rolling set. The method comprises the following steps: heating a titanium plate blank with a thickness of between 50 and 90 millimeters in a roller-hearth type soaking furnace to between 800 and 1,000 DEG C, controlling inlet temperature of the titanium plate blank entering the medium-wide band heat rolling set at a temperature of between 800 and 950 DEG C, controlling process temperature to between 700 and 950 DEG C, and keeping final rolling temperature at a temperature of between 700 and 800 DEG C after fine rolling for seven times; and well controlling roll gap width, depressing rate, roll force and roll (rolling) speed of each stander of the heat rolling set, controlling the rolling speed of the titanium plate rolled by the tail stander of the heat rolling set at between 4.0 and 8.0 meters per second, and coiling the titanium plate by a coiling machine after cooling the titanium plate by water, wherein the coiling temperature is between 550 and 680 DEG C. The method uses a CSP production line to produce the non-ferrous metallic titanium plate (coil) for domestic initiation, and has extremely great economic and social benefits.
Owner:湖南湘投金天钛金属股份有限公司 +1
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