82results about How to "Reduce rolling costs" patented technology

The invention discloses a superhigh-strength high-toughness steel plate for ocean engineering and a manufacturing method thereof. The superhigh-strength high-toughness steel plate comprises the following chemical components in percentage by weight: 0.06-0.10% of C, 0.20-0.40% of Si, 1.10-1.65% of Mn, at most 0.010% of P, at most 0.0020% of S, 0.030-0.050% of Nb, 0.020-0.060% of V, 0.006-0.015% of Ti, 0.60-1.30% of Ni, 0.30-0.60% of Cr, 0.20-0.60% of Cu, 0.40-0.60% of Mo, 0.020-0.040% of Alt, and the balance of Fe and inevitable impurities. The production method comprises the following steps: smelting in a converter, rolling on a Steckel reversing mill, and finally carrying out hardening and tempering heat treatment by a TMCP (thermomechanical rolling process) technique. The steel plate has favorable properties: the tensile strength is 770-840 MPa, the yield strength is 710-800 MPa, the elongation percentage is 16-19%, the -40 DEG C low-temperature lateral impact and low-temperature ageing impact properties are greater than or equal to 90J, and the cold bending resistance is qualified; and thus, the steel plate has the advantages of ultrahigh strength, excellent low-temperature impact and low-temperature ageing impact properties, and stable production technique.

The invention discloses a two-roller reversible mill roller device and technology using continuous casting round billets for carrying out rolling production. Four types of hole patterns including a transition hole pattern, a supporting hole pattern, a before-finished-product hole pattern and a finished product hole pattern are designed on a pair of rollers. The rolling technology comprises the steps of using the transition hole pattern (1) for rolling the continuous casting round billets, and turning over steel after rolling is accomplished, wherein the rolling reduction ranges from 40 mm to 90 mm per pass; using the supporting hole pattern for continuously rolling the drum-shaped rolled pieces obtained in the previous step to obtain rectangular or square rolled pieces which have regular shapes, and turning over the steel after rolling is accomplished, wherein the rolling reduction ranges from 40 mm 90 mm per pass; using the before-finished-product hole pattern (3) for rolling the rolled pieces to obtain rectangular or oval rolled pieces with reserved rolling reduction and reserved broadening quantity, and turning over the steel billets after rolling is accomplished, wherein the rolling reduction ranges from 20 mm to 90 mm per pass; using the finished product hole pattern for rolling one pass to obtain rolled pieces which are high in dimensional accuracy and product quality, wherein the rolling reduction of square or rectangular steel finished products ranges from 40 mm to 60 mm per pass, and the nominal rolling reduction of round steel ranges from 10 mm to 40 mm per pass.

A process for preparing ultralow-carbon steel by vacuum degassing features that the argon flow and the vacuum level are dependent on the service age of the furnace, that is, for the initial 20 batches, the argon flow is matched with inner diameter of insertion-in tube, and for the following batch whose decarbonizing time is longer than 5 min, the argon flow is increased by more than 20%. Before decarbonizing the molten steel, the vacuum chamber is depressurized in advance. Within 0-10 min after beginning decarbonization, the depressurizing speed is increased.

The invention belongs to the technical field of hot continuous rolled plate strips, in particular relates to a composite micro-alloying hot rolled steel plate containing V and Nb and a preparation method thereof, which can achieve the purpose of controlling the surface quality thereof. The composite micro-alloying hot rolled steel plate containing V and Nb, which is provided by the invention, not only can reduce the generation of red scales but also can not increase the production cost. The composite micro-alloying hot rolled steel plate comprises the following chemical components in percentage by weight: C which is greater than or equal to 0.06% and is less than or equal to 0.08%, Si which is greater than 0.20% and is less than or equal to 0.30%, Mn which is greater than or equal to 0.70% and is less than or equal to 0.90%, V which is greater than 0.04% and is less than or equal to 0.05%, Nb which is greater than or equal to 0.02% and is less than or equal to 0.03%, P which is less than or equal to 0.025%, S which is less than or equal to 0.015%, and the balance iron and inevitable impurities. The preparation method provided by the invention has no need of reconstructing the existing equipment, has simple and controllable technological conditions, realizes the purpose of reducing the generation of scales by controlling the tapping temperature, the precision rolling temperature, the finishing temperature, the coiling temperature and the cooling mode of a plate blank, and has the advantages of low energy consumption and low cost.

The invention relates to a negative deviation monitoring system and a negative deviation detection calculation method for ribbed steel bars. The negative deviation monitoring system comprises a data acquisition system, a data processing system, a conventional automatic bar rolling line control system and a field display system; the data acquisition system and the conventional automatic bar rolling line control system communicate with the data processing system through industrial Ethernet; the data processing system and the field display system are connected through a serial bus; the data acquisition system comprises a steel material weighing terminal, a hot metal monitor and a programmable logic controller (PLC 1); the steel material weighing terminal is connected with the PLC 1 through a field bus; the hot metal monitor is connected with the PLC 1 through a screened cable; the conventional automatic bar rolling line control system comprises an upper computer, a DC speed regulation device and a programmable logic controller (PLC 2); the upper computer communicates with the PLC 2 through industrial Ethernet; the DC speed regulation device is connected with the PLC 2 through another field bus. The negative deviation monitoring system provided by the invention can effectively improve the steel billet yield and reduce the rolling cost.

The invention discloses a high-shear-strength super-thick composite steel plate for a generation III nuclear power station and a manufacturing method of the composite steel plate. The composite steelplate consists of steel-plate carbon steel and 304L austenitic stainless steel. The assembly sequence is as the follows from top to bottom: stainless steel, carbon steel, an isolating agent, carbon steel and stainless steel. Edge sealing is carried out on four edges of a combined billet by welding, vacuumizing treatment is carried out, and the vacuum degree is 100 Pa or lower. The heating temperature of the combined billet is 1200-1270 DEG C, the heating time is 10-15 hours, the single-stroke reduction rate is 5%-15%, the final rolling temperature is controlled to be 1050 DEG C or above, tempering heat treatment is carried out after rolling, the quenching temperature is 870-930 DEG C, the heat preservation time is 2-4 min/mm, and the heating rate is 1.0-1.5 min/mm. The tempering temperature is 620-660 DEG C, the heat preservation time is 3-6 min/mm, and the heating rate is 1.5-2.0 min/mm. The thickness of a finished composite steel plate is 29-110 mm, the shearing strength is good, andthe requirement of steel for composite boards of a nuclear power station is met.

The invention provides a one-step large-deformation rolling method of a beta solidification TiAl alloy plate. The method comprises the following steps that 1, raw materials are weighed; 2, a TiAl alloy casted ingot is manufactured by utilizing a vacuum induction melting technology, and heat treatment is carried out; 3, two-step hot extrusion deformation is carried out on the alloy; and 4, one-steplarge-deformation packing rolling is carried out on the alloy, and a pack is removed so as to obtain the TiAl alloy plate which is uniform and fine in structure. According to the one-step large-deformation rolling method of the beta solidification TiAl alloy plate, the beta solidification TiAl alloy with excellent high-temperature deformation capability is adopted, the beta phase content is controlled to be 15%-25%, and the excellent high-temperature deformation capability of the TiAl alloy is ensured; meanwhile, the alloy structure of a blank is refined violently through the two-step extrusion so as to remarkably improve the structure uniformity of the alloy, and therefore, one-step large-deformation rolling of the blank can be guaranteed, finally, the TiAl alloy plate with the uniform and fine structure and good room temperature plasticity is obtained, and the problems that in the prior art, a TiAl alloy rolled blank is coarse in structure, plate forming is difficult, and the platestructure uniformity is poor are solved.

The invention discloses steel flat for high-performance farm tools and working tools and a processing method of the steel flat. The steel flat is composed of the following components in percentage by weight: 0.43-0.47 wt% of C, 0.18-0.30 wt% of Si, 0.60-0.75 wt% of Mn, not larger than 0.025 wt% of S, not larger than 0.025 wt% of P, and the balance of Fe and inevitable impurities. The steel flat is prepared by the procedures of molten steel smelting and deoxidation alloying, molten steel LF furnace refining, molten steel casting, billet heating, rolling and steel finishing. The 90mm*16mm steel flat for hoe and shovel tools is obtained by the processing method disclosed by the invention, the mechanical processing property of the steel flat is better than that of GB/T699 standard, and the section of the steel flat is rectangular. Compared with 45 steel for hoe and shovel tools produced by a complete continuous-rolled bar rolling mill process, the steel flat disclosed by the invention has the advantages that the rolling cost is reduced by more than 20 Yuan/ton, and the steel flat has the advantages of low production cost, strong process adaptability and controllability, excellent comprehensive product performance and the like, thereby being capable of well meeting the requirements of city greening and farm production development.

The invention belongs to the field of iron steel processing and particularly relates to a method for employing large cross-section continuous casting round billet to roll a round steel bar. The method for employing the large cross-section continuous casting round billet to roll the round steel bar comprises the following steps: 1) clamping plates arranged on pushing beds are adopted to align the large cross-section continuous casting round billet with a rolling trough; the large cross-section continuous casting round billet is sent to a rough mill for rolling, so as to produce intermediate billet; from the third rolling pass of the rough mill, steel turning is carried out once in each odd-numbered pass ; 2) the intermediate billet is sent to finishing mills for rolling with 4-6 pressing passes, so as to produce finished round steel bar; the diameter Phi of the finished round steel bar is in a scope that is larger than or equal to 120 mm and is less than or equal to 150 mm; the rolling pass of the rough mill is the eleventh pass; the rolling passes of the finishing mills are 4-6 passes; or the diameter Phi of the finished round steel bar is in a scope that is larger than or equal to 160 mm and is less than or equal to 280 mm; the rolling pass of the rough mill is the thirteenth pass; the rolling passes of the finishing mills are 4-6 passes. The method for employing the large cross-section continuous casting round billet to roll round steel bar has the advantages of shallow-slot large rolling reduction cogging, high rolling efficiency, low rolling cost and energy conservation. The method for employing the large cross-section continuous casting round billet to roll round steel bar has an outstanding advantage that under equal specification, the reduction ratio of the finished round steel bar is large and the quality is good.

The invention discloses a centrifugal casting mold composite end cover and a method for carrying out composite roll centrifugal casting through the same. The centrifugal casting mold composite end cover comprises a casting mold end cover and an additional end cover. The casting mold end cover and the additional end cover are movably connected through a rotary buckle device composed of screw holes, bolts and protruding clamping openings. The method for carrying out composite roll centrifugal casting through the centrifugal casting mold composite end cover comprises the steps that the centrifugal casting mold composite end cover is installed at the two ends of a metal cast mold, a thickened roll working layer is centrifugally cast, and the roll core portion and neck are statically cast in a mold assembling mode after the additional end cover is dismantled, wherein the specific steps comprise casting sand preparation, casting tool preparation and preheating, metal casting mold coating, liquid metal treatment, working layer centrifugal casting, static casting of the core potion and roll neck, and cooling machining. The centrifugal casting mold composite end cover and the method for carrying out composite roll centrifugal casting through the same have the advantages that installation is easy and convenient, the thickened working layer is formed during centrifugal casting, the roll service life is prolonged, the rejection rate and cost are reduced, and meanwhile casting and machining of the roll core portion and neck are not affected.

The invention discloses a vertical loop device for a high-speed wire rod rolling mill. The device is arranged between an upstream rolling mill and a downstream rolling mill, and comprises a loop rising roller, a guide roller, and loop side plates arranged on two sides of the guide roller, wherein a guide slot with a guide centering function is formed in the roller surface of the guide roller. A rolled piece can always operate at the middle position of a loop rolling channel by the guide slot, the rolled piece is prevented from being scratched by the loop side plates, and the product quality is improved; the wire scratching phenomenon is eliminated, the rolling fault time is greatly reduced, and the working efficiency of the rolling mill is improved; and the wear of the loop side plates and a downstream rolling mill inlet guide and protection part is reduced, the service life is prolonged, and the rolling cost is reduced.

The invention belongs to the technical field of garment rolling machines, and particularly relates to an efficient rolling machine for garment accessories. The efficient rolling machine comprises a rack, wherein a driving roller and a driven roller are rotationally connected to the rack; a sliding block is slidably connected in a first sliding groove formed in a vertical rod, and a guide wheel isrotationally connected to the side surface of the sliding block through a cross rod; an air bag is arranged at the top of the first sliding groove; a platform is fixedly connected to the rack, a pairof guide rails are fixedly connected to the two sides of the top of the platform, a cutter is slidably connected between the two guide rails, and springs are fixedly connected to the positions, corresponding to the guide rails, of the two sides of the bottom of the cutter; a first air cylinder is fixedly connected to the tops of the guide rails through a supporting plate, and a rack is fixedly connected to one end of a piston rod of the first air cylinder; a gear is rotationally connected to the position, corresponding to the rack, of the tops of the guide rails through a support; and a cam isfixedly connected to the side, close to the cutter, of the gear. According to the efficient rolling machine, after the diameter of a cloth roll formed by the garment accessories is increased, the guide wheel and the sliding block are driven to slide upwards, the cutter is driven to slide downwards and cut off cloth, then the garment accessories are quantitatively rolled, and the manual nursing cost is reduced.

The invention relates to a novel graphite semi-steel bar and finished product roller assembly, which comprises an upper roller and a lower roller. The upper roller comprises an upper roller body, andan upper roller neck and an upper bearing retainer roll neck located on two ends of the upper roller body; the lower roller comprises a lower roller body, and a lower roller neck and a lower bearing retainer roll neck arranged correspondingly; 2 to 5 'U'-shaped grooves surrounding the upper roller body are arranged on the upper roller body at intervals; 2 to 5 inverted 'U'-shaped bulges surrounding the lower roller body are arranged on the lower roller body at corresponding intervals; a smooth platform is arranged between each two adjacent grooves or bulges; and the upper roller body and the lower roller body are mutually meshed. According to the novel graphite semi-steel bar and finished product roller assembly provided by the invention, through the inverted 'U'-shaped bulges and the 'U'-shaped grooves of the roller bodies, bars and parts with required shapes are rolled, and meanwhile, through adjusting a distance between the two rollers, the thicknesses of the rolled bars and partsare adjusted, so that the production efficiency is improved.

The invention discloses a rolling method, in particular a rolling method for controlling tissue homogeneity of a high strength hot rolled steel plate, and belongs to the technical field of steel platerolling processes. The invention provides the rolling method for controlling tissue homogeneity of the high strength hot rolled steel plate effectively by improving the rolling step and the parameters thereof. The rolling method comprises the following steps: uniform temperature heating and temperature different controlling discharging, intermediate speed rough rolling of a four reversible reversing roughing mill, surface temperature control finish rolling by a seven-rack continuous mill and cooling by a laminar cooling unit which controls inner and outer temperature conditions. In the intermediate speed rough rolling process of the four reversible reversing roughing mill, a high pressure water descaling nozzle at the inlet of the four reversible reversing roughing mill is opened to descale and cool the surface of strip steel, so that the surface temperature of the strip steel is reduced by 80-120 DEG C.

The invention relates to lubricating oil for cold rolling of tubular products and a preparation method of the lubricating oil. The preparation method comprises the steps of firstly weighing 5-60 parts of base oil and 2-35 parts of oxidized vegetable oil in parts by weight, adding the base oil and the oxidized vegetable oil into a container provided with a stirring device and a heating device, stirring at a heating state, adding 0.5-20 parts of vegetable oil, 1-10 parts of an oxidant, 0.1-20 parts of an oily lubricant, 0.2-15 parts of an extreme pressure anti-wear reagent and 0.1-15 parts of an anti-rusting agent, continuing to heat and stir, controlling the heating temperature, heating time and stirring speed during the heating and the stirring, adding 1-15 parts of a surfactant, heating, stirring, controlling the heating temperature, heating time and stirring speed during the heating and the stirring, cooling, and discharging, so as to obtain the lubricating oil for the cold rolling of the tubular products. The lubricating oil has the beneficial effects that the extreme pressure wear resistance is excellent; process links are few, and the comprehensive rolling cost is low; and the process flow is simple, and the process requirements are not strict.

The invention provides supporting steel for a containment vessel of a nuclear power station and a manufacturing method thereof. The steel comprises the following components in percentage by weight: 0.10%-0.16% of C, 0.25%-0.45% of Si, 1.40%-1.65% of Mn, 0.45%-0.65% of Ni, 0.20%-0.50% of Cr, 0.20%-0.55% of Mo, 0.02%-0.04% of Alt, 0.05%-0.10% of Cu, 0.03-0.05% of V, 0.005-0.020% of Ti, 0.008% or less of P, 0.005% of less of S, 0.010% or less of N, and the balance being Fe and unavoidable impurities. The manufacturing method comprises smelting, continuous casting, heating, rolling and heat treatment. The thickness of a steel plate produced from the steel is 30-80 mm, the steel plate in the quenched and tempered state, simulated post-weld heat treatment state and 200 DEG C high temperature state completely meets the requirements of technical indicators, and meanwhile -40 DEG C impact absorption energy is still remained at a high level.

The invention discloses a production method for an industrial pure titanium plate. The production method for the industrial pure titanium plate comprises the steps that (1), a titanium material blankbody is heated, descaled and subjected to at least one time of rough rolling, and a titanium plate blank body is obtained; (2), 5-6 passes of finish rolling is conducted on the titanium plate blank body by adopting a seven-rack hot continuous rolling mill throwing rack, and a titanium plate is obtained; and (3), after the titanium plate is cooled, an industrial pure titanium plate finished productis obtained. By adopting the production method, the titanium plate rolling number can be decreased, the reduction rate of each pass is increased, grains are refined, and the properties of the titanium plate are improved; and meanwhile, rolling consumed oil and cooling water are reduced while the rolling number is decreased, and the rolling cost is reduced.

A torsional vibration reducing device includes a rotating body, rolling bodies, and a connection member. The rotating body includes guide holes, and the connection member includes accommodating portions that has at least two contact portions. The accommodating portions are positioned in the guide holes, and the guide holes accommodate the rolling bodies. The accommodating portions are configured to hold the outer peripheral surface of each of the rolling bodies with the contact portions, in a direction in which the rolling body reciprocates.

Disclosed is a hot rolling oil which enables to reduce a rolling cost by effectively decreasing a rolling load when a steel member is heated and rolled within a temperature range of 200-1200 DEG C. Also disclosed is a method for hot rolling a steel member by using such a hot rolling oil. Specifically disclosed is a hot rolling oil containing a base oil and at least one polymer selected from the group consisting of isobutylene homopolymers and isobutylene copolymers having a number average molecular weight of 8,000-100,000. Also specifically disclosed is a method for hot rolling a steel member, which is characterized in that the hot rolling oil is fed by a water injection system.