735results about "Work heating devices" patented technology

The invention discloses a rolling and annealing treatment process for a copper-steel composite strip, and relates to the technical field of material rolling, the process comprises the following steps: selecting a high-purity copper plate and a stainless steel plate, and depositing a nano nickel / graphene composite transition layer through a magnetron sputtering technology; the stainless steel layer is promoted to deform through front-section low-speed high-pressure rolling, and the copper layer interface bonding force is improved through rear-section high-speed low-pressure rolling; performing short-time local annealing by using a high-frequency induction coil; honeycomb-shaped micro-pits are formed in the stainless steel surface through the laser micro-texture technology, and the interface bonding force is improved in combination with the nano-nickel / graphene layer. Copper layer hardening is eliminated through low-temperature annealing, stainless steel recrystallization is promoted through medium-temperature annealing, and a nanometer precipitated phase is fixed through rapid water cooling; the heating rate is controlled, and nitrogen-hydrogen mixed gas is used for preventing oxidation; the rolling process and the annealing process are seamlessly connected, and the temperature, the stress and the atmosphere are detected in real time through an online monitoring system. The mechanical property, the corrosion resistance and the machining stability of the copper-steel composite strip are remarkably improved.

The invention relates to the technical field of metal composite material rolling, and discloses equipment and a process for hot-warm wave flat rolling of a titanium steel composite plate. The rolling assembly comprises a first rolling piece and a second rolling piece, and a plate is firstly subjected to corrugated rolling through the first rolling piece and then subjected to flat rolling through the second rolling piece; the straightening part is used for straightening the plate subjected to corrugated rolling; the conveying part is arranged on the rack, located above the first rolling part and used for stably conveying the heated plate; and the heating assembly comprises a heat preservation piece and two heating pieces, the two heating pieces are arranged on the first rolled piece and the second rolled piece correspondingly and used for heating the plate materials before rolling, and the heat preservation piece is arranged on the conveying piece and used for conducting heat preservation on the conveyed plate materials. According to the invention, the bonding strength of the composite plate is improved, the residual stress of the rolled plate is reduced, the phenomena of tail slippage, tail cracking, oxidation and the like of the plate are avoided, and the phenomenon of surface cracking caused by poor metal plasticity is avoided.

The invention discloses a manufacturing method of a high-efficiency and low-cost steel plate for a 345MPa-grade low-temperature pressure vessel, and belongs to the technical field of low-carbon microalloyed steel production. The manufacturing method comprises the steps of molten steel smelting, LF refining, RH vacuum degassing, continuous casting, casting blank heating, rolling, controlled cooling and straightening. The problems that steel plate rolling efficiency is low, rolling resistance is large, and the plate shape is not easy to control are solved, the steel plate is low in cost, high in strength and toughness and high in straightness, and the service safety of the steel plate for the low-temperature pressure container can be guaranteed.

The invention relates to the technical field of metal processing, in particular to a method for producing ultra-thin and ultra-wide limit specification engineering structure steel through a wide and thick plate mill, the method comprises the steps of casting blank heating, rolling, hot straightening and air cooling to the room temperature, in the casting blank heating process, when the casting blank is heated to 1235-1260 DEG C and the gas pressure of a header pipe is 7-9 KPa, the steel tapping rhythm is increased to be larger than or equal to 180 s, and the steel tapping rhythm is increased to be larger than or equal to 180 s; the soaking time and the heating time are 4-4.5 hours, and the total in-furnace time is 5-6.5 hours; when the gas pressure of a main pipe is less than 7KPa, the tapping rhythm is increased to be more than or equal to 230s, the soaking section and heating time is 4.5-5h, the total in-furnace time is 5.5-7h, and the steel billet tapping temperature is more than or equal to 1230 DEG C; the air-fuel ratio is regulated between 1.7 and 2.3, and the temperature difference between the upper surface and the lower surface of the blank is within 15 DEG C; the wide and thick plate rolling mill is used for producing the steel for the engineering structure with the thickness specification of 4-6 mm and the width larger than 3500 mm, and the problems that the steel plate is thin in rolled piece and rapid in temperature reduction, waves are prone to occurring in the production process, the thickness is uneven, and the one-time passing rate and the waste reduction rate of the steel plate are affected are solved.

The invention provides a production method of a steel wire rod and a welding wire, and the production method of the steel wire rod comprises the following working procedures sequentially performed on a square billet: a heating working procedure: the square billet sequentially passes through a preheating section, a heating section and a soaking section, the temperature of the preheating section is controlled to be 820-870 DEG C, the temperature of the heating section is controlled to be 950-1000 DEG C, the temperature of the soaking section is controlled to be 1000-1040 DEG C, and the total heating time is 70-90 minutes; in the rolling procedure, rough rolling, intermediate rolling and finish rolling are conducted on the heated square billet to obtain a wire rod, the finish rolling inlet temperature is controlled to be smaller than or equal to 850 DEG C, the rolling speed is controlled to be 100-110 m / s, and the spinning temperature is controlled to be 780-810 DEG C; and a cooling process: after spinning, controlling the cooling speed to be less than or equal to 0.6 DEG C / s, and cooling the wire rod to 500-550 DEG C. According to the production method of the steel wire rod, the steel wire rod has a small-size structure, drawing is facilitated, the mechanical property of the same circle is uniform, the thickness of the oxide layer is uniform, and shelling is facilitated.

The invention discloses composite strip rolling and stamping forming equipment and a composite strip rolling and stamping method, and relates to the technical field of rolling, and the composite strip rolling and stamping forming equipment comprises an unwinding device, a pulse current heating device, a rolling compounding device, a strip buffering device, an annealing straightening device, a stamping forming device and a winding device which are sequentially arranged in the conveying direction of a strip; the unwinding device unwinds the metal belt; the current heating assembly of the pulse current is used for electrifying and heating the metal belt; the rolling composite device is used for rolling the plurality of metal strips into metal composite strips; the strip buffering device is used for buffering and conveying; the annealing and straightening device is used for annealing and straightening; the punch forming device is used for punching and trimming; and the winding device is used for winding. According to the invention, each metal strip can be respectively and accurately electrified and heated to a high temperature through the current heating assembly, so that the electroplasticity of the strip is improved, the interface bonding strength of the copper steel metal strip is improved, the phenomena of edge rebound, wrinkling and the like of a stamped product are effectively improved through the electroplasticity, and the product quality is improved.

The invention discloses a production method of a non-annealing cold heading steel hot-rolled wire rod, and relates to the technical field of steel production, the method comprises the following steps: selecting a steel billet meeting the production specification requirement of the cold heading steel wire rod, and carrying out coping finishing and preheating treatment on the steel billet to be processed; the steel billet is conveyed to a large-compression-ratio rolling unit, the hot rolling process is monitored in real time, hot rolling segmented regulation and control are conducted, multi-pass temperature gradient rolling is achieved, and a cold heading steel wire rod formed through hot rolling is obtained; and the hot-rolled cold heading steel wire rod is conveyed to a heat preservation tunnel furnace, a cold heading steel wire rod finished product is obtained through segmented controlled cooling and surface treatment, and production of the annealing-free cold heading steel hot-rolled wire rod is achieved. According to the method, the advanced rolling mill unit with the large compression ratio is adopted for producing the cold heading steel wire rods of different specifications, the heat preservation tunnel furnace is adopted, the cooling temperature and the cooling speed of the wire rods are controlled, production of the annealing-free cold heading steel hot-rolled wire rods is achieved, the production process is greatly simplified, the production period is shortened, the production cost is reduced, and the production efficiency is improved.

The invention discloses a hot continuous rolling preparation method of a single-sided stainless steel composite plate, which comprises the following steps of: milling and grinding one surface of each of two base materials according to a relative shape complementation mode; the surface is machined into an irregular concave-convex surface comprising n planes which are sequentially connected in the transverse direction or the longitudinal direction, the base material is a non-uniform-thickness blank with the thickness non-monotonically changing in the transverse direction or the longitudinal direction, and n is larger than or equal to 2; assembling according to the stacking sequence of the base material, the composite material, the composite material and the base material to prepare a composite blank; the composite blank is heated at the temperature of 1210-1270 DEG C, then hot continuous rolling is conducted, rolling is conducted for 1-3 passes at the temperature of 1180-1240 DEG C, and the rolling reduction is larger than or equal to 30 mm; rolling is conducted for 3-5 passes at the temperature of 1050-1170 DEG C, and the rolling reduction is larger than or equal to 28 mm; the initial rolling temperature is larger than or equal to 950 DEG C, the finish rolling temperature is larger than or equal to 850 DEG C, then cooling is conducted, and coiling is conducted at 560-660 DEG C; and flattening the obtained composite coil, and then carrying out stack cooling between two steel plates with the temperature of Tf-Tf + 150 DEG C.

The invention relates to the technical field of steel rolling, and discloses a Q355B steel hot rolling process optimization method based on dynamic temperature control, which comprises the following steps: blank pretreatment, dynamic heating control, high-pressure water descaling, rough rolling process, finish rolling process, laminar cooling and coiling process. According to the method, a collaborative system of multi-section variable-temperature heating and intelligent temperature control is constructed, temperature distribution in a furnace and the heating rate are monitored and dynamically adjusted in real time, it is guaranteed that the core surface temperature of a plate blank is uniform and consistent, thermal stress and the internal crack tendency in the heating process are eliminated, and a high-temperature blank uniform in structure and stable in performance is provided for follow-up rolling; meanwhile, the high-pressure water descaling system optimizes jet flow parameters and introduces chemical additives, so that a protective layer is formed while oxide scales on the surface are removed, the surface cleanliness and quality of the plate blank are improved, and product defects caused by incomplete descaling and surface damage are avoided.

According to the production method of the hot-rolled copper-steel double-metal composite plate, copper is oxygen-free copper, and Cu is larger than or equal to 99.95%; the steel is low-alloy high-strength steel; the key process steps of the copper-steel composite plate comprise assembling, heating, rolling, cooling and finishing. By controlling the rolling temperature, the pass reduction rate, the cooling speed and other processes, the plate shape of the copper-steel rolled composite plate is obviously improved, the stability of the bonding surface is greatly improved, and therefore industrial production and application of the copper-steel bimetal rolled composite plate are achieved.

According to the high-quality high-speed wire rolling method for the low-alloy high-speed steel wire rod based on continuous casting forming, gradient heating is conducted through the step type heating furnace, preheating of a continuous casting blank is uniform, and phase change stress is reduced. The initial rolling temperature is set and controlled to be 1060-1100 DEG C, the finish rolling temperature is controlled to be 950-1050 DEG C, the spinning temperature is controlled to be 980-1030 DEG C, and the highest rolling speed is 25 m / s. And after rough rolling, induction heating temperature compensation is carried out to increase the surface temperature of the blank, the temperature is set to be 1000-1040 DEG C, the temperature compensation time is controlled to be 10-20 s, and surface cracks and head wind caused by too low temperature are prevented. And closing the cover plate after spinning, adopting heat collection, immediately entering a slow cooling tunnel furnace for furnace cooling after doffing, and discharging for annealing after 48 hours or longer. A continuous casting technology is used for replacing a traditional die casting technology, controlled rolling and controlled cooling in the rolling process are matched, composition segregation is remarkably reduced, the core quality is improved, carbides are effectively refined, the uniformity of products is guaranteed, the production efficiency is improved, the production cost is reduced, and the influence on the environment is reduced; and a new process and a new route are provided for producing the high-quality low-alloy high-speed steel wire rod.

The invention discloses a rolling treatment process for one-step forming of w-shaped hinge section steel, and particularly relates to the technical field of rolling treatment processes, which comprises the following steps: S1, heating; s2, descaling is carried out; s3, rolling is conducted; s4, cooling; s5, straightening; s6, saw cutting; and S7, quality inspection. According to the rolling treatment technology for one-time forming of the W-shaped hinge section steel, the efficient production process can be achieved, the procedures from heating, descaling, rolling to cooling are closely connected, the automation degree is high, the production period is greatly shortened, the production efficiency is improved, and the production cost is reduced. Meanwhile, strict quality control measures are taken in each key step, such as a computer temperature control and pulse combustion technology in a heating process, a high-pressure system and optimized parameters in a descaling process, precise equipment and precise control in a rolling stage, and a three-section laminar cooling process in a cooling link. Therefore, the dimensional accuracy and the cross section shape of the product are ensured.

The invention relates to a control method for preventing a medium carbon steel hot-rolled coil from being flattened. The control method comprises the following steps: 1) hot charging and hot delivery of a continuous casting billet; (2) putting a heat preservation cover and an edge heater into the middle roller way; (3) the laminar flow roller way and the coiling machine rotate at the set advance rate; 4) controlling the head temperature of the strip steel before coiling, and performing laminar cooling to shield the edge part; (5) after the coiling machine builds tension, constant tension needs to be formed between a coiling block and a finish rolling tail rack; (6) covering and coiling in a coiling machine after coiling; and (7) the steel coils are placed on the flat coil prevention steel coil frame after entering the coil warehouse, are stored in a single layer and are prevented from being placed at a ventilation position, and impact on the steel coils is avoided during hoisting. The technical process is optimized and improved, the measures that the temperature of a rolled piece is kept consistent as much as possible, it is guaranteed that a steel coil is not loosened after being coiled, the influence of expansion generated by phase change of the steel coil on interlayer gaps is reduced, and the shape of the steel coil is fixed to prevent the flat coil from being aggravated are taken, so that the flat coil rate is greatly reduced.

The present invention discloses a method for single-pass rolling of thin-gauge and ultra-wide TC4 titanium alloy plates. The method adopts EB flat ingots, explosive compounding, slab heating, single-pass rolling, straightening and annealing processes to obtain thin-gauge and ultra-wide TC4 titanium alloy plates. The plate width is 3500-4300 mm, the plate thickness is 20-30 mm, and the microstructure of the thin-gauge and ultra-wide TC4 titanium alloy plates is an α+β dual-state structure. The plate has the advantages of good plate surface quality, wide plate width, and small difference in longitudinal and transverse mechanical properties.

The invention belongs to the technical field of rolling, and particularly relates to an anti-decarburization and anti-brittle failure controlled cooling process for a high-silicon-chromium alloy tool steel wire rod. Aiming at the dilemma that the hot-rolled wire rod which contains more than 2.0% of Si, more than 1.1% of Cr, Mo, V and other alloy elements not only meets the decarburization requirement of a product, but also does not have brittle failure of the wire rod, the method comprises the following steps: firstly, determining the cover entering temperature of the hot-rolled wire rod, the cooling speed of the wire rod before the hot-rolled wire rod enters the cover and other key process parameters; and then the method is realized by adjusting the speed of a roller way, the number of opened heat preservation covers after spinning, a fan Jinling device, the air volume of a fan, the spinning temperature and the like, so that the hot rolling structure of the wire rod is a pearlite structure which is not easy to brittle, and meanwhile, the requirement that the decarburization of a product does not exceed 0.55 D (D is the diameter of the wire rod) is met.

The invention relates to a mixed rolling production line and a production method thereof. The production line comprises a production line A and a production line B which are arranged in parallel; the production line A comprises a continuous casting unit, a line A rough rolling unit, a line A hot coiling station, a finish rolling unit, a cooling device and a coiling unit which are collinearly arranged in sequence; the production line B comprises a heating furnace, a line B descaling device, a line B rough rolling unit and a line B hot rolling station; a furnace discharging roller way of the heating furnace, the line B descaling device, the line B rough rolling unit and the line B hot rolling station are collinearly arranged in sequence; the A-line hot rolling station and the B-line hot rolling station are connected through a transverse moving track, and a movable hot rolling device is movably arranged on the transverse moving track. The movable hot rolling device is switched between the A-line hot rolling station and the B-line hot rolling station, organic coupling of the two production lines is achieved, the thin slab production mode and the thick slab production mode of the mixed rolling production line share the finish rolling unit, the coiling machine and the like, and the equipment investment and the occupied area of the production line are effectively reduced.

The invention discloses a novel process for realizing online softening and improving cold heading performance of SCM435 series cold heading steel, and relates to the technical field of cold heading steel processing. The invention discloses a novel process for realizing online softening and improving the cold heading performance of SCM435 series cold heading steel. According to the method, S1, steel billet continuous casting forming, S2, steel billet precise heating, S3, low-temperature rolling molding, S4, wire rod standard spinning, S5, stelmor cooling and S6, heat preservation vestibule slow cooling are carried out, the uniformity of the process performance is remarkably improved, by innovatively optimizing the spinning coefficient and the roller way speed, it is fundamentally guaranteed that the disc shape is neat, the heat dissipation conditions of all positions of the wire rod in a slow cooling vestibule are consistent, and the heat dissipation efficiency of the wire rod is improved. Therefore, uniform transformation of a whole-roll structure and a same-circle structure is achieved, the consistency of cold heading performance is greatly improved, the cracking risk in the cold heading process is effectively reduced, the technology is remarkable in energy-saving and consumption-reducing effect, rolling waste heat is fully utilized for on-line softening, the traditional off-line reheating and annealing procedure is completely omitted, and energy consumption can be saved by about 30% or above.

The invention relates to the technical field of rolling processes of hot-rolled pipeline steel plates, and particularly discloses a production method of L245 steel for oil and gas pipelines, which is characterized in that the mass percentages of components in heated and smelted molten iron are respectively limited according to different thickness specifications of produced steel coils; a cold blank heating mode is adopted in the hot rolling process, whether a steel blank is a cold blank or a hot blank is judged according to the charging temperature of the steel blank, the heating temperature, the in-furnace time and the soaking section heating time are controlled, and the heating temperature is set according to different thickness specifications of produced steel coils; a finish rolling inlet reference temperature, a finish rolling temperature and a coiling temperature are respectively set according to different thickness specifications of produced steel coils, and front-section cooling is adopted in a cooling strategy; the descaling box of the roughing mill group is normally put into use, and the descaling box of the finishing mill group is normally put into use; on the premise of keeping the low cost of the L245 steel, the strength is slightly higher than the standard requirement, and the impact energy at-20 DEG C is greatly improved; the H2S corrosion resistance is high, the welding adaptability is good, and the process universality is high.

The invention relates to the technical field of high-temperature alloy materials, and provides an N10276 profiled bar and a forming method thereof.The surface of a blank is coated with a three-layer composite sheath, the blank is heated in a partitioned and gradient mode, the temperature of a side wing plate area is 50-100 DEG C higher than that of a web plate area, the metal fluidity of a side wing plate is improved, cogging rolling, four-roller reciprocating finish rolling, partitioned and gradient cooling and secondary solution treatment are conducted, and the N10276 profiled bar is obtained. A nitric acid and hydrofluoric acid mixed solution is used for pickling and stripping the composite sheath, an oxide layer is removed, intergranular corrosion is avoided, a triple sheath synergistic protection mechanism is adopted, oxygen is physically isolated by outer stainless steel, and heat loss is inhibited by a middle yttria-stabilized zirconia ceramic fiber layer.

The application discloses a preparation method of a rail with low residual stress and corrosion resistance, and comprises the following steps: S1, cooling the steel rail after rolling; S2, adopting light pressing down to straighten the steel rail after the cooling for the first time; S3, heating the rail bottom of the steel rail after the first time of straightening; and S4, using multiple pairs of straightening rollers to straighten the steel rail after the heating for the second time, wherein each pair of straightening rollers symmetrically straightens the rail head and the rail bottom. The application can reduce the residual stress of the rail bottom and improve the corrosion resistance of the rail.

The invention discloses a titanium and titanium alloy thin bar continuous rolling production line and a rolling method. The rolling production line comprises a roughing roller set, a compensation heating device, a pre-finishing roller set, a temperature control device, a finishing roller set and a coiling device which are sequentially and linearly arranged. According to the production line, the (square) blanks can be linearly and continuously rolled into finished thin bars from one end to the other end, and the finished thin bars are coiled, so that the problems that the operation burden and the operation hidden danger exist in current reciprocating rolling, the temperature drop of the blanks cannot be effectively compensated in the continuous rolling process, and the production efficiency is low are solved. The problem that the temperature drop is further increased during material transfer among the procedures of radial forging, rough rolling and finish rolling is solved, so that the machining efficiency and yield of the titanium and titanium alloy coiled thin bars are effectively improved, meanwhile, the quality of finished products is further guaranteed through compensation and temperature control, and compared with remelting compensation after material transfer at present, the working efficiency is effectively improved, and the production cost is reduced. And the temperature compensation amplitude is reduced, so that the energy consumption of the whole processing stage is reduced.

The present application relates to copper plate strip processing technical field, provide a kind of advanced copper plate strip continuous rolling process, including S1.selecting the copper ingot of copper content above 99.9%, after sawing and surface polishing to obtain raw material;S2.copper ingot is heated in heating furnace, ensure the uniformity of copper ingot internal temperature;S3.using roughing mill to the copper ingot after heating is rolled through 2-3 passes roughing;S4.copper plate strip after roughing enters medium rolling mill, and medium rolling pass is 3-5 times;S5.copper plate strip after medium rolling enters finishing mill, and finishing pass is 3-4 times;S6.on-line cooling: copper plate strip after finishing immediately enters on-line cooling system.By early accurate sawing and polishing treatment, the initial quality of copper plate strip is guaranteed, the smooth progress of subsequent rolling process is ensured, the multi-pass continuous rolling process of roughing, medium rolling and finishing is combined with on-line cooling, through strict parameter control, not only improve production efficiency, but also effectively reduce energy consumption, reduce production cost.

The invention relates to the field of forging forming, in particular to a ring rolling process heating constant-temperature device and a heating method, and the device comprises a heating mechanism, a monitoring mechanism and a control mechanism; the heating mechanism comprises a power source, a transformer and a coil, the power source, the transformer and the coil are electrically connected in sequence, the coil is provided with a U-shaped heating area and used for being arranged near a main roller of the ring rolling machine, and one section, in the circumferential direction, of the annular forge piece is located in the U-shaped heating area. The monitoring mechanism comprises an infrared thermometer, and the infrared thermometer is used for monitoring the temperature of the annular forge piece; the control mechanism comprises a controller, and the infrared thermometer and the power source are electrically connected with the controller. Through cooperation of the controller, the infrared thermometer and the heating mechanism, the problem of local temperature drop of the ring piece in the machining process is effectively solved, the near-isothermal ring rolling technology can be achieved, the uniformity and consistency of the structure of the ring piece are remarkably improved, and the defects of coarse grains, cracking and the like are overcome.

The invention relates to a method for eliminating color difference type defects of a stainless steel cold-rolled sheet, which comprises the following steps of: controlling the finish rolling temperature in finish rolling of a plate blank and the coiling temperature after finish rolling, so that the thickness of an oxide layer on the surface of the plate blank is within 8-12 microns; in the cold rolling process, the roller roughness of a last roller is adjusted according to the color difference value of the plate blank so as to reduce the edge color difference and the center color difference of the plate blank; and the annealing process after cold rolling is controlled so that the thickness fluctuation of the Cr2O3 film can be smaller than or equal to 5%. By means of the method for eliminating the color difference defects, the color difference defect rate of the 304 stainless steel cold-rolled sheet is reduced to 0.4% from 2.8%, the overall color difference is smaller than or equal to 0.7, the corrosion resistance of a passive film is improved by 40% (salt spray test is larger than or equal to 96 h), and the international leading level is achieved; and the requirement of a high-quality surface is met.

The invention relates to the technical field of steel industry, and discloses a multi-specification self-adaptive temperature control rolling process in a bar rolling process, which comprises the following steps: S1, a blank pretreatment stage, S2, an intelligent heating stage, S3, a high-pressure water descaling stage, S4, a multi-pass rolling stage, S5, on-line size monitoring, S6, a post-rolling controlled cooling stage and S7, a finishing stage. The production change time is shortened, on the basis of a specification-temperature-roll gap correlation model, automatic matching of phi 20-100 mm full-specification parameters is achieved, the production change time is shortened to be within 15 minutes (reduced by 60% or above compared with a traditional process), automatic switching of equipment parameters such as an MES system correlation rolling plan, a water cooling box and descaling pressure is achieved, manual adjustment errors are avoided, the multi-specification production qualification rate is increased to 99.5%, and the production efficiency is improved. According to the scheme, the temperature control precision is improved, the product performance is optimized, the three-section temperature of the heating furnace is controlled through the fuzzy PID algorithm, and the bearing steel heating temperature equalization time is shortened by 30%.

The invention relates to the field of titanium and titanium alloy processing, and provides a preparation method of a high-uniformity TA31 titanium alloy thick plate, which comprises the steps of cast ingot preparation, plate blank size design, plate blank preparation, plate rolling, thermal correction and annealing, and surface treatment. Wherein the slab preparation comprises the following steps: cogging and forging: the heating temperature is 1150 DEG C, reversing upsetting and drawing are firstly carried out, and then secondary remelting and temperature compensation are carried out; intermediate forging is carried out, specifically, the heating temperature is T beta-(20-40) DEG C, reversing upsetting and drawing are carried out firstly, and then remelting and temperature supplementing are carried out twice; and forming and forging, wherein the heating temperature is T beta-(40-55) DEG C, shaping is conducted firstly, and then remelting and temperature supplementing are conducted. According to the preparation method, the high-uniformity TA31 titanium alloy thick plate with the thickness of 40-100 mm is obtained, meanwhile, the forging cost is reduced, and the production period is shortened.

The invention relates to the technical field of rolling of hot-rolled patterned rolled plates, and discloses rolling equipment for hot-rolled patterned rolled plates and a rolling method thereof.The rolling equipment comprises a first roller type conveying belt, a displacement mechanism is fixedly installed on the lower side of the first roller type conveying belt, and three second roller type conveying belts are arranged on the right side of the first roller type conveying belt; a rough rolling station is arranged on the side, close to the first roller type conveying belt, of the second roller type conveying belt, a finish rolling station is arranged at the end, away from the first roller type conveying belt, of the second roller type conveying belt, and a third roller type conveying belt is arranged at the end, away from the second roller type conveying belt, of the finish rolling station. The first roller type conveying belt and the second roller type conveying belt are each provided with a protective cover, and each protective cover is provided with an inner layer and an outer layer. And a gas module is mounted on the protective cover. The tapping temperature of the steel billet from the heating furnace can be detected, so that the thickness of a finished product to be processed can be indirectly known, and a rough rolling production line and a finish rolling production line for processing the corresponding finished product thickness can be automatically matched.

The invention relates to the technical field of steel rolling, and particularly discloses a high-speed wire rod slitting rolling method which comprises the following steps: blank heating: heating a steel blank to 1050-1100 DEG C, and keeping rolling plasticity; rough rolling and intermediate rolling: rolling the steel billets into intermediate billets through 1 #-9 # rolling mills; in the step of pre-finish rolling and segmentation, two pre-rolled pieces with the diameter phi being 24 mm are obtained through segmentation rolling through a 13 #-18 # pre-finish rolling machine, a double-line segmentation system and a shared channel system are adopted in a segmentation composite high-line production line, the double-line segmentation system is formed by transforming a 2 # small rod production line into a double-segmentation composite high-line production line, and the double-segmentation composite high-line production line comprises a north line segmentation channel and a south line segmentation channel. A steel splitting device is arranged behind the 18 # pre-finishing mill; finish rolling and cooling: respectively passing the cut wire through a north line or south line finish rolling unit, then looping by a silking machine, and cooling by a scattered coil air cooling line; the production capacity and the economic benefit are improved by cutting the hole pattern and splitting the steel conveying curve guide groove, and the multi-specification requirements of the market are met.

The invention relates to a preparation method of a thin-specification 550Mpa-grade high-fracture color-coated substrate, and belongs to the technical field of preparation of color-coated substrates. The method comprises the steps that a casting blank with set chemical components is obtained, and the set chemical components comprise a trace amount of Nb; the casting blank is sequentially heated, hot-rolled and coiled, and a hot-rolled plate coil is obtained; the hot-rolled plate coil is sequentially subjected to acid pickling, edge cutting and cold rolling, the unit tension of each pass, the reduction rate of each pass and the total reduction rate of cold rolling are controlled, and a cold-rolled plate coil is obtained; and the cold-rolled plate coil is sequentially subjected to annealing, finishing and hot dipping, and the color-coated substrate is obtained. Through the optimization of the whole-flow process, especially the fine control of key steps such as hot rolling, cold rolling and annealing, the color-coated substrate which is thinner, higher in strength and capable of meeting the elongation requirement is successfully produced under the condition that no Nb alloy is added or only a small amount of Nb alloy is added. The substrate is low in cost, excellent in performance and wide in application prospect.

The invention discloses a rolling method of a high-carbon hard wire rod, and belongs to the technical field of steel rolling. The method comprises the following steps: loading a small square billet subjected to casting blank quality inspection into a heating furnace, and heating the casting blank; the method comprises the following steps: (1) a rolling process: controlling the tapping temperature to be 1100-1150 DEG C, controlling the initial rolling temperature to be 1050 DEG C or above, controlling the finish rolling temperature to be 950 DEG C or above, controlling the spinning temperature to be 870 DEG C or above, performing segmented control on a fan, and fully opening a heat preservation cover; (2) according to the specification requirement of a wire rod, a small square billet is adopted for rolling the wire rod, the rolling specification is phi 12.5 mm, and control is conducted according to the B-level precision; and (3) mechanical property requirements: the tensile strength is 1120-1250MPa, the percentage elongation after fracture is greater than or equal to 10%, and the percentage reduction of area is greater than or equal to 30%. The high-carbon hard wire rod produced by the novel process has the characteristics of good surface quality, good structure property, good drawing property and the like.