52results about How to "Reduce rolling pressure" patented technology

The invention discloses a headless continuous casting and rolling ferrite rolling method and device of a low / micro-carbon steel coil for deep drawing and belongs to the field of metallurgy steel rolling. According to the headless continuous casting and rolling ferrite rolling method and device of the low / micro-carbon steel coil for deep drawing, continuous casting for blank forming, rough rollingof a rough rolling unit, temperature control of a cooling channel, descaling of high-pressure water, ferrite rolling of a finishing mill group, cooling of a layer cooling device, high-speed flying shear and shunt winding and coiling of a reeling machine are carried out. By means of the method and device, the problems that heating / soaking of a heating furnace is needed before rough rolling of a conventional hot rolling process, and cooling with temperature retaining is needed due to the fact that the temperature difference of rough rolling of an austenite zone and finish rolling of a ferrite zone is large and the problems that for thin slab casting and rolling processes with CSP as a respective, heating / soaking or induction heating for temperature supplementing of a heating furnace is needed are solved, the advantages that the arrangement is compact, the investment is small, the production efficiency is high, safety and reliability are achieved, energy is saved, environmental friendliness is achieved, and the cost is reduced are achieved, and the low-carbon / micro-carbon steel coil for deep drawing is produced through headless continuous casting and rolling and ferrite rolling.

The invention discloses a slotless rolling art for all-horizontal rolling mill which rolls round bar and screw-thread steel on semi-continuous rolling process online. It arranges junior mill 2, crop flying shear 3, junior mills group 4, crop and crop end flying shear 5, loop 6 or 8 or 9 or 10, finishing mills group 7 and times ruler flying shear 11 after blooming mill 1 consecutively; installs plain-barreled roll 41 or 42 and 71 or 72 on the third or fifth rolling mill frames of junior mills group 4 and the first and third rolling mill frames of finishing mills group 7, the plain-barreled rolls need not be processed hole-type groove, the rolling pressure is decreased significantly. The plain-barreled rolling mills does not have wrong rollers in whole rolling process, does not generate ears, decreases central waste rollers, saves changing roller time, increases rolling mill efficiency. The plain-barreled roll slotless rolling art not only can be used in flat alternative continuous rolling process line, but has a bright prospect in development and application of all-horizontal rolling mill process line.

The invention provides a rolling method and device for headless continuous casted and rolled ultra-low carbon steel roll ferrite used for ultra-deep drawing, and belongs to the field of metallurgicalrolling. The process of the rolling method is continuous casting for billet forming, high pressure water descaling, coarse rolling through a coarse rolling machine set, rapid cooling (controlling phase change), high pressure water descaling, ferrite rolling through a fine rolling machine set (blowing and sweeping water between racks), cooling through a layer cooling device, high speed flying shearfor roll slitting and coiling through a coiling machine. By means of the rolling method, the difficult problems that the heating temperature of a heating furnace before coarse rolling in a conventional hot rolling process is high, the time of temperature waiting for cooling time between coarse rolling in an Austenite area and fine rolling in a ferrite area is long, and the fine rolling temperature, the steel coil surface quality, forming performance and the like of continuous casting and rolling process of a thin plate which is represented by CSP are difficult to stably control are solved, the rolling method has the advantages of being compact in layout, few in investment, high in production efficiency, safe, reliable, energy-saving, environmental-protection, low in cost and the like, andthe ultra-low carbon steel coil for ultra-deep drawing is produced through headless continuous casting and rolling and ferrite rolling.

A process for preparing the very-thin oriented silicon steel band with high and stable magnetic property includes such steps as acid washing of recrystallized and oriented silicon steel plate, cold rolling to make its thickness reach 0.06-0.1 mm, heat treating at 700-980 deg.C in protective atmosphere, coating and annealing.

The invention relates to a continuous asynchronous rolling device of a magnesium alloy sheet strip coil and belongs to the field of magnesium alloy materials. The continuous asynchronous rolling device conducts decoiling on the magnesium alloy strip coil through a decoiling device, the magnesium alloy strip coil enters a flattening machine to be flattened through a tension pinch roller and enters a strip coil preheating device through the tension pinch roller after being corrected to be heated to preset temperature, feeding material thickness is measured through a thickness gauge, then the strip coil enters a continuous asynchronous rolling machine for rolling, the rolled strip coil passes through the thickness gauge to measure thickness of a finished product and enters a rolling machine to be rolled through the tension pinch roller, and the whole coiling rolling is achieved after stable rolling tension is finished. The continuous asynchronous rolling device has the advantages of reducing rolling pressure and rolling torque, reducing energy consumption, increasing gate transformation quantity, improving rolling efficiency and the like, thereby being favorable for rolling production of strip coils of magnesium alloy which is hard to deform.

The invention relates to synthetic environmental protection hot rolling oil and the preparation method. The combined environmental protection hot rolling oil comprises the component with the following weight portions of 67-92.5 portions of synthetic base oil, 5-20 portions of oiliness agent, 1-10 portions of extreme pressure agent, 0.5-1 portions of antioxidant and 0.5-1 portions of metal passivator. The raw materials of each component are mixed together based on the weight portions, and then the temperature is risen to 50-70 centigrade, and the finished hot rolling oil can be made after being uniformly stirred, filtrated and packaged. The hot rolling oil has good property, is environmental protect without polluting, is favorable for the maintenance of the equipment and can prolong the service life of the equipment.

The invention relates the hot roll oil. The invention uses biodegradation oil as base oil, uses ester as oiliness agent, and adds extreme-pressure agent, antirusting agent, anti-oxidant and metallic purifying agent. The technology comprises the following steps: mixing base oil, adding addition agent, heating to 50-70Deg.C, stirring them, filtering, and packaging. The invention has the advantages of improving surface finishment of steel plate, modifying surface state of roll, extending life, reducing draught pressure of rolling mill and motor working current, saving energy, environment protection and improving accuracy of measurement.

This invention relates to a hot rolled pattern production method, which comprises the following steps: improving the temperature and optimizing scale removal system to improve the rolling exit temperature and steel plastic property and the pattern shaping property; enlarging the pattern process deepness to increase the pattern area and improve the pattern shaping property so to improve the pattern sheet height and lower the rack screw-down rate of the pattern.

The invention provides a preparation method of a high-strength ultra-fine crystal copper strip material, belonging to the field of mechanism and metallurgy combination processing of nonferrous ultra-fine crystal material. The method of the invention adopts a multi-time asynchronous lamination rolling process method to lead the grains of large-grain copper plate to be fined; the strength of the gained ultra-fine crystal copper material is improved by twice, the electrical conductivity is not reduced and the gained material has good extensibility. The method of the invention solves the composition of interface in the deformation of the material, reduces the rolling pressure and energy consumption, improves the precision of the product and realizes the continuous preparation and production of the high-strength ultra-fine crystal material.

The invention discloses a method for producing stainless steel welded pipes with patterns, which is characterized in that floral patterns with clear lines are rolled on the surfaces of the stainless steel welded pipes and the production efficiency is high. The method comprises the following steps: heating the stainless steel strips with intermediate frequency heating coils under the protection of mixed gases of hydrogen and nitrogen; carrying out continuous production and discontinuous engraving by a three-roller type asynchronous engraving hot mill; and cooling the stainless steel strips which exit from a rolling mill and have single surfaces engraved, rolling roughly molded horizontal roller sets into drums and welding the drums into circular pipes with a stainless steel pipe welder, wherein the horizontal rollers in the horizontal roller sets are made of MC nylons or rubber materials; an upper roller of the rolling mill is a drive engraving roller, a medium roller is a driven plain work roller and a lower roller is a drive plain backup roller; the engraving depth is 0.2-2.7mm; the external diameter ratio of the upper, medium and lower rollers is 1:0.2-0.4:0.8-1; and the speed ratio of the upper and lower rollers is 1:0.6-0.9.

The invention relates to a method for preparing a high-flatness tungsten-nickel-iron alloy plate. The method comprises the following steps of pressing granulated and dried tungsten-nickel-iron alloy powder, and rolling the tungsten-nickel-iron alloy powder to obtain a tungsten-nickel-iron alloy green body with a thickness of 0.5 to 1.8mm and uniform density; placing the obtained tungsten-nickel-iron alloy green body into a sintering furnace, sintering the tungsten-nickel-iron alloy green body under the protection of hydrogen, and cold-rolling the sintered tungsten-nickel-iron alloy green body until the deformation reaches 40 percent; re-sintering the cold-rolled tungsten-nickel-iron alloy green body for 1 to 3 hours at the re-sintering temperature of 1,100 to 1,300 DEG C under the protection of hydrogen; repeating the former two steps until the thickness of the green body is smaller than 0.4mm; overlaying two tungsten-nickel-iron alloy plates with the thickness of 0.15mm, and rolling-milling the tungsten-nickel-iron alloy plates for about 25 times under the pressure of about 15T until the thickness of a single plate is less than 0.1mm. According to the method, a production process is simplified, the energy consumption is lowered, the production cost is reduced, and green production is ensured.

The invention discloses an asynchronous cold rolling forming process of an aluminum alloy stainless steel composite plate. The process comprises the following process steps: 1, rolling and compoundinga stainless steel plate and an aluminum alloy plate in an asynchronous rolling mode, and 2, after asynchronous rolling, diffusing and annealing the composite plate, specifically, in the step 1, online heating is carried out on the opposite surface of the composite plate surface of the stainless steel plate, online cooling is carried out on the opposite surface of the composite plate surface of the aluminum alloy plate online, and the heating temperature is 350 DEG C-850 DEG C; the temperature of the composite plate surface of the stainless steel plate from which the composite plate is rolledis lower than 650 DEG C, and the temperature of the composite plate surface of the aluminum alloy plate from which the composite plate is rolled is lower than 300 DEG C; the rolling reduction rate is20%-90%; the different speed ratio of a roller for asynchronous cold rolling is 1.05-1.50; the thickness ratio of the aluminum alloy plate to the stainless steel plate is 1.5-4.0; and in the step 2, the annealing temperature is 250 DEG C-500 DEG C and the annealing time is 15-120 min. The single-side online heating process for rolling the composite plate is creatively provided so as to improve theinterface bonding strength of the composite plate and realize rolling compounding in an interface semi-melting state.

The invention discloses a control method for eliminating chromatic aberration defects of secondary cold rolling of 400-series stainless steel, and belongs to the technical field of stainless steel rolling. The first-pass deforming rate is 10-16%; the roughness of a first-pass working roll is 0.5-2.0 mu m; a constant-pressure mode is adopted as a first-pass rolling pressure mode; and a first-pass plate shape curve adopts a structure that two sides are bent upwards, the middle part is horizontal, two sides and the middle part are in smooth transition, and the edge plate shape value is 0-30N / mm<2>. According to the method, the secondary cold rolling color difference defect of the 400-series stainless steel is eliminated, and the surface quality of a 400-series stainless steel cold plate is improved.

The invention relates to a method for preparing a high-flatness pure-tungsten metal sheet. The method comprises the following steps of placing a pure-tungsten metal plate with a thickness of 0.1 to 0.4mm on a preheating roller mill for warm rolling, and rolling-milling the pure-tungsten metal plate until the deformation is 30 percent under the conditions of pressure of about 12T and speed of 200 to 600r / min, wherein a single feeding mode is adopted; uniformly dividing the rolled pure-tungsten metal plate along the length direction, and overlaying the uniformly-divided pure-tungsten metal plates along the thickness direction; performing subsequent warm rolling by adopting a double-layer overlaying feeding method, and rolling the pure-tungsten metal plates on the roller mill until the thickness of a single plate reaches a required thickness. According to the method, the number of intermediate annealing times is reduced, a production process is simplified, the rolling pressure and rolling passes are reduced, the energy consumption is effectively reduced, the production cost is lowered, and the production efficiency is improved.

The invention relates to a temperature control method for rolled strip steel in a ferrite area. The temperature control method comprises the following steps: arranging a first intermediate billet cooling device at an outlet of a roughing mill, and arranging a second intermediate billet cooling device at an outlet of a hot coil box or a heat preservation cover; controlling the heating temperature of a steel billet to be 1050-1200 DEG C, controlling the temperature of an intermediate billet after rough rolling to be within the austenite temperature range of steel and to be 10-40 DEG C higher than the final temperature of austenite, and detecting the temperature of the intermediate billet in front of an inlet of a finishing mill group in real time; and fully opening a first cooling device, and making the second intermediate billet cooling device adjust the opening and closing combination and the cooling water flow of each pair of coolers in real time according to the temperature, so that the intermediate billet in front of the inlet of the finishing mill group is cooled to be 0 to 30 DEG C higher than the ferrite phase transformation final temperature. According to the temperature control method, the problems that in the prior art, before finish rolling, the temperature of the intermediate billet is not accurately controlled, the temperature of a strip billet is not uniform, and the cooling swing time between rough rolling and finish rolling is too long are solved.

The invention discloses coumarin-containing aluminum rolling oil and a preparation method thereof, belonging to the technical field of processing and lubrication. The invention mainly aims to solve the technical problems that traditional aluminum rolling oil contains phosphorus, sulfur and chlorine extreme pressure agents, is not beneficial for environmental protection, easily causes surface annealing oil spots and corrosion and the like. The coumarin-containing aluminum rolling oil provided by the invention comprises the following components in percentage by weight: 8.0%-10.0% of fatty alcohol, 4.0%-5.5% of a cosolvent and 0.50%-3.0% of coumarin, with the balance being base oil. The main additive of the coumarin-containing aluminum rolling oil is a natural compound, so the problem of environmental pollution is effectively solved, the lubricating property of the coumarin-containing aluminum rolling oil under high-speed wide-width high-pressure rolling conditions can be obviously improved, surface quality is remarkably improved, and the wear degree of a workpiece is reduced.

The invention discloses a slotless rolling art for all-horizontal rolling mill which rolls round bar and screw-thread steel on semi-continuous rolling process online. It arranges junior mill 2, crop flying shear 3, junior mills group 4, crop and crop end flying shear 5, loop 6 or 8 or 9 or 10, finishing mills group 7 and times ruler flying shear 11 after blooming mill 1 consecutively; installs plain-barreled roll 41 or 42 and 71 or 72 on the third or fifth rolling mill frames of junior mills group 4 and the first and third rolling mill frames of finishing mills group 7, the plain-barreled rolls need not be processed hole-type groove, the rolling pressure is decreased significantly. The plain-barreled rolling mills does not have wrong rollers in whole rolling process, does not generate ears, decreases central waste rollers, saves changing roller time, increases rolling mill efficiency. The plain-barreled roll slotless rolling art not only can be used in flat alternative continuous rolling process line, but has a bright prospect in development and application of all-horizontal rolling mill process line.

The invention discloses a controlling method of iron oxide sheet of rolled band steel surface of middle-thin board blank, which is characterized by the following: controlling component; proceeding heat load directly; heating to remove phosphor; rolling under high temperature; forcing to cool; controlling Si content in the steel; eliminating red ferric oxide on the surface of heat roll steel; fitting for the steel with not more than 0.18%C, not more than 0.20% Si, not more than 1.50% Mn, not more than 0.015% P, not more than 0.01% S and Nb, V and Ti.

The invention relates to a novel ingot rolling method, wherein the steel airing and rolling-delay time is between 6 and 12 minutes according to the difference of ingot cases before rolling ingots and after descaling the ingot by a descaler, and the surface temperature of the steel ingots after steel airing is lower than the central temperature of the steel ingots. The steel ingot rolling method is used for controlling the defect of multiple edges of steel plates, and utilizes airing to reduce the temperature gradient caused by the difference of the internal temperature and the external temperature of the steel ingots and the deformation resistance gradient caused by the temperature gradient, so as to increase the deformation seepage power under the condition of surface deformation of rolling pieces, make small deformation capable of generating larger deformation seepage capacity, improve the deformation uniformity of the rolling pieces during rolling, and reduce the difference of internal deformation and external deformation of the rolling pieces, thereby improving the shape quality of the steel plates and the grain uniformity in the steel plates.

The invention discloses a high-precision zirconium alloy plate rolling method. The method comprises the steps that 1, a zirconium alloy slab is polished until the intra-plate difference is 0.15-0.25 mm; 2, the polished zirconium alloy slab passes through a working roller of a reversible plate rolling mill and is clamped by a hydraulic clamp, and then a hydraulic cylinder provided with a tension sensor is used for making the polished zirconium alloy slab generate and keep tension; and 3, reciprocating tension rolling is carried out and the tension in the rolling process of the zirconium alloy slab is simultaneously controlled to obtain a zirconium alloy plate material. According to the method, the hydraulic cylinder with the tension sensor, a displacement sensor and the plate rolling mill are cooperatively used, the zirconium alloy plate is subjected to reciprocating tension rolling, and the deformation resistance of the working roller and the zirconium alloy plate is reduced by accurately adjusting the tension during rolling, so that the phenomenon of uneven rolling of the zirconium alloy plate and surface scratches and cracks caused by moving and sliding of the zirconium alloy plate are avoided, and the precision of the surface of the zirconium alloy plate is improved.

The invention relates to a borax antioxidant. The borax antioxidant comprises the following components in weight percentage: 20 to 40% of powdery anhydrous borax, 15 to 30% of anhydrous sodium sulfate, 10 to 30% of sodium aluminate, 5 to 10% of MgO and 5 to 10% of dispersing agent. A preparation method of the borax antioxidant comprises the following steps: adding the powdery anhydrous borax into a reaction kettle at room temperature; stirring; adding the anhydrous sodium sulfate and the sodium aluminate; after stirring for about five minutes, adding the MgO and the dispersing agent; and stirring for about twenty minutes later, and stopping stirring. The borax antioxidant is suitable for rolling different materials and has the characteristics of no pollution, strong oxidation resistance and good chemical stability and physical stability.

The invention relates to a method for preparing a high-flatness wide pure-molybdenum metal plate. The method comprises the following steps of placing pure-molybdenum metal powder into a roller mill, and rolling-milling the pure-molybdenum metal powder to obtain a green body with a thickness of 0.5 to 1.4mm and a width of 120 to 160mm; placing the obtained pure-molybdenum metal plate green body into a high-temperature furnace, sintering the pure-molybdenum metal plate green body for 1 to 3 hours, and cooling and discharging the pure-molybdenum metal plate blank out of the high-temperature furnace; rolling-milling the pure-molybdenum metal plate blank preheated to required temperature for many times by using a roller mill; when the thickness deformation of the pure-molybdenum metal plate blank in the previous step reaches 20 to 40 percent, keeping the rolled plate at the temperature of 900 to 1,300 DEG C for 1 to 3 hours, and cooling and discharging the rolled plate out of the furnace; repeating the former two steps until the pure-molybdenum metal plate is rolled-milled to the thickness of about 0.5mm, placing the obtained pure-molybdenum metal plate into a four-roller mill, and rolling-milling the pure-molybdenum metal plate to the thickness of about 0.25mm; placing two pure-molybdenum metal plates with the thickness of 0.25mm into the four-roller mill in an overlaying way, and rolling-milling the pure-molybdenum metal plates to the thickness of less than 0.15mm. According to the method, procedures are simplified, the energy consumption is lowered, the consumption is lowered, the cost is reduced, and green production can be ensured.

The invention discloses a composite board and a preparation method thereof. The composite board comprises a middle interlayer which is a Mn-B steel base layer, and at least two stacking layers which are arranged on the upper side and the lower side of the middle interlayer respectively. The stacking layers are metal layers with paramagnetism. When the composite board is formed, the two stacking layers are arranged on the upper side and the lower side of the middle interlayer respectively, and after the two stacking layers are attached along the edge of the joint of the stacking layers and themiddle interlayer, the stacked composite board is formed through edge sealing connection. Mn-B steel is used as matrix metal to replace conventional Q235 or Q345 and other common carbon steel materials, and due to the fact that the element B is added, the matrix metal (carbon steel) has excellent hardenability, and higher strength can be easily obtained through subsequent quenching and other heattreatment methods. Through reasonable thickness matching of two different materials and optimization of a rolling-heat treatment process system, preparation of the high-strength and high-plasticity composite board is achieved.

The invention relates to an agricultural implement accessory, in particular to a mini-tiller tire. The mini-tiller tire comprises a hub (1), a spoke (2), a rim (3) and iron sheets (4) and is characterized in that the multiple iron sheets (4) are arranged on the circumference of the rim (3) at equal intervals. The mini-tiller tire has the advantages that the contact area between the rim and the ground is reduced, grinding force applied on the ground is reduced, and crop growth is facilitated; meanwhile, the iron sheets are arranged on the rim to guarantee that adequate friction force is generated with the ground.

The invention discloses flattening antirust oil for cold-rolled steel plates and a preparation method thereof; the flattening antirust oil is made from, by weight, 300-500 parts of trimethylolpropane oleate, 200-400 parts of a multi-effect antirust agent, 10-30 parts of alcohol ethoxylate-9, 450-650 parts of paraffin-based basic oil, 40-60 parts of vulcanized olefin cottonseed oil, 10-30 parts of polyisobutene, and 5-10 parts of an antioxidant. The flattening antirust oil has good lubricating property and antirust property, and can be applied to a flattening process to reduce surface roughness of cold-rolled steel plates, reduce rolling pressure and shorten production cycle.

The invention discloses a technological rolling lubricating system of a finish rolling mill for hot-rolled strip steel. The lubricating system comprises a water supply device, an oil supply device and a metering pump station. The oil supply device is connected with oil inlets of the metering pump station by working oil pumps on the oil supply device, the water supply device is connected to a water inlet of an oil and water mixing control unit, the metering pump station is connected to an oil inlet of the oil and water mixing control unit, and the oil and water mixing control unit is connected with a lubricating header. The technological rolling lubricating system has the advantages that the stability of the shape of a roller can be improved, and the service life of the roller can be effectively prolonged; stressed conditions of the surface of the roller can be relieved, accordingly, the roller replacement frequency can be reduced, and the operation time of the roller can be prolonged; rolling force can be reduced, so that electric energy can be saved; the quality of the surface of the strip steel can be improved, so that the pickling ability can be improved after the strip steel is subjected to hot rolling; after rolling oil is applied, a friction coefficient of the inside of a deformation zone is reduced, so that the rolling pressure can be decreased.

The invention relates to a method for removing calibration marks of working rollers of a rolling mill. A roller change control program is added to an automatic control system of the rolling mill; an upper support roller is pre-adjusted to a middle position, and an upper working roller used for applying a positive roller-bending force and an upper middle roller are allowed to be contacted with theupper support roller; the upper working roller and the upper middle roller are rolled to a rolling position under the action of self-weight of the upper support roller; and simultaneously, the initial rolling force is adjusted to be 30% to 35% of the normal rolling force and the roller-bending force is set to be lower than 30%. Since the positive pressures, the impact forces and the rolling forces of the support rollers and the middle rollers on the working rollers and the steel strip are reduced, the calibration marks formed on the working rollers during the rolling change process and the start-up process are reduced or eliminated, and the surface quality of the steel strip is improved. Particularly, the method reduces the frequency of continuously changing the working roller, reduces the labor intensity of the operating staff, increases the work efficiency and the operating rate of the rolling mill, reduces the loss of defective products, and saves the cost by more than 0.7 million RMB per year.