481results about "Work heating devices" patented technology

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 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.

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 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 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 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 provides a seamless steel tube and a preparation method thereof. The preparation method comprises the steps that S1, raw materials of the seamless steel pipe are sequentially subjected to burdening, smelting, first heating, perforating, rolling, first cooling, second heating and sizing or reducing, and a first steel pipe is obtained; s2, the inner surface of the first steel pipe is subjected to water spraying cooling, and a second steel pipe is obtained; s3, the outer surface of the second steel pipe is atomized and cooled, and a third steel pipe is obtained; and S4, the third steel pipe is subjected to second cooling, and the seamless steel pipe is obtained. By means of the two-stage rapid cooling process of inner surface water spraying cooling and outer surface atomization cooling, the problem that in the cooling process of the ultra-thick-wall hot-rolled seamless steel pipe, the heat storage amount is large; and when a pass-type cooling mode is adopted, the cooling speed is reduced due to temperature return of the inner surface of the seamless steel pipe, so that the seamless steel pipe cannot be quickly and uniformly cooled.

The invention relates to the technical field of motor clamp springs, and particularly discloses a high-strength ultrathin titanium alloy for a motor clamp spring and a preparation method thereof.The preparation method comprises the steps that firstly, a titanium alloy cast ingot is subjected to hot forging machining, coarse and large crystal grains are crushed, then hot rolling is conducted, and in the hot rolling process, pulse current is adopted for assisting, and the high-strength ultrathin titanium alloy is obtained through the electroplastic effect; the method comprises the following steps: carrying out hot rolling to obtain a grain structure finer and more uniform than traditional hot rolling, then carrying out shot blasting treatment and carbonitriding treatment on the surface of a titanium alloy matrix to enhance the hardness, strength, wear resistance and fatigue resistance of the material, and finally, introducing a residual compressive stress field while eliminating surface defects and increasing surface compactness by adopting a heat-assisted ultrasonic rolling process, so as to improve the wear resistance of the material. The generation and expansion of fatigue microcracks are inhibited, and the anti-fatigue performance of the material is enhanced.

The present application relates to the technical field of steel plate production, and particularly relates to a production method of an extremely thin Nb-containing 355MPa-grade pickling plate, which comprises the following steps: 1) slab blanking: the difference between the slab width and the target width is controlled to be within 50mm, and the slab single weight is controlled according to the single steel rolling distance within 1150m; 2) heating: the air-fuel ratio of the heating furnace is set to be 1.8-2.0, the furnace atmosphere is controlled to be weak oxidizing, the furnace outlet temperature is 1220-1240 DEG C, the second heating section + soaking time is greater than or equal to 65min, the total in-furnace time is greater than or equal to 170min, and the interval between the steel tapping is greater than or equal to 160s; 3) rough rolling: the slab outlet does not use the SP width press, the rough rolling adopts two rolling mills, and each rolling mill is rolled for three passes; the descaling water is fed in each pass; 4) finish rolling: the finish rolling inlet temperature is controlled to be 1050-1080 DEG C, and the finish rolling temperature is within the range of 860-900 DEG C; 5) when the flatness defect occurs during the coiling, the cooling setting time is increased in the coiling drum. The present application guarantees the stable rolling and improves the surface quality of the steel plate.

The invention discloses a rolling process method for Q355C, D and E grade steel plates with the thickness of 100-150 mm. The rolling process method comprises the following steps that raw materials are prepared and smelted; the molten steel is transferred into an LF furnace for refining, lime and fluorite slagging materials are added, the refined molten steel is transferred into a VD furnace for vacuum degassing treatment, and the vacuum degree is smaller than or equal to 67 Pa; continuous casting: carrying out continuous casting or die casting on the molten steel subjected to vacuum degassing for pouring, and controlling the pouring temperature to be 1550-1560 DEG C; heating: feeding the casting blank into a heat accumulating type heating furnace for heating, and controlling the heating temperature to be 1200-1240 DEG C; the heated casting blank is subjected to normalizing rolling, and in the rolling process, high-pressure water is used for reducing the surface temperature of the steel blank; cooling, wherein the rolled steel plate is subjected to accelerated cooling, and the water entering temperature is 890-910 DEG C; and stack cooling is conducted, specifically, the rolled steel plate is subjected to stack cooling, and the stack cooling temperature is higher than 420 DEG C. The Z-direction performance of the developed steel plate reaches Z35 through reasonable component design and the normalizing rolling and NCP technology, and the steel plate has good obdurability matching and welding performance.

The invention discloses a production method for improving the structure uniformity of a 304 austenitic stainless steel medium-thickness plate, belongs to the field of stainless steel production, and solves the problem that mixed crystal structures often appear in the structure of the 304 austenitic stainless steel medium-thickness plate produced by an existing method. The method comprises the following steps: producing a 304 austenitic stainless steel continuous casting sheet billet; the plate blank is heated for the first time, the temperature of a heating furnace is set to be 1280-1300 DEG C, the heating time is 300-360 min, and natural cooling is conducted; the plate blank is remelted, heated and rolled again, the heating temperature is set to be 1250-1270 DEG C, the heating time is 240-300 min, and the remelted and reheated plate blank is rolled to the target thickness; and solution treatment is conducted, the solution treatment temperature ranges from 1050 DEG C to 1080 DEG C, the solution treatment time coefficient ranges from 1.0 min / mm to 2.0 min / mm, and water cooling is conducted to the room temperature. The structure uniformity of the 304 austenitic stainless steel medium plate produced by the method is obviously superior to that of a traditional method.

The invention relates to an apparatus (1) and to a method for producing flat-rolled products from metal slabs, preferably thick slabs having a thickness of at least 140 mm, wherein the apparatus (1) comprises: at least one casting machine (10) which is designed to cast a strand from a metal, preferably steel; a transport device (30) which is designed to transport the strand in a transport direction along a transport line (T); a separating device (14) which is arranged downstream of the casting machine (10) in the transport line (T) and is designed to separate the strand into individual slabs; a rolling device (50) which is arranged downstream of the separating device (14) in the transport line (T) and is designed to roll each slab into a flat-rolled product; a temperature setting system (20) comprising an induction heating device (22) which is arranged between the separating device (14) and the rolling device (50) and is designed to heat the slabs to a hot-rolling temperature; and a control device (100) which is in communication with the induction heating device (22) and is designed to actuate the induction heating device (22) such that each slab is heated in a non-uniform manner along its longitudinal extent.

The invention relates to the technical field of metal material production, in particular to a 20CrMnTiH steel banded structure control method based on non-recrystallization zone rolling. The method comprises the following steps: heating a continuous casting steel billet in a soaking section at the temperature of 1,160-1,200 DEG C; after descaling, carrying out rolling at 1120-1180 DEG C, and carrying out rough rolling and intermediate rolling; the intermediate billet is subjected to water cooling before finish rolling, the outlet temperature of the intermediate billet is controlled to be 850-930 DEG C, and the intermediate billet enters an austenite non-recrystallization area; and then finish rolling is carried out, and the temperature on a cooling bed is controlled to be 900-950 DEG C. According to the method, through the synergistic effect of'segregation reduction at a high soaking temperature 'and'grain refinement through rolling in a non-recrystallization region', the technical contradiction between bainite inhibition and banded structure improvement is successfully solved. After the method is implemented, the average grade of the banded structure of the 20CrMnTiH steel can be reduced from 1.55 grade to 0.99 grade, and the maximum grade does not exceed 1.5 grade, so that the structure uniformity is obviously improved, the quenching deformation of subsequent heat treatment is reduced, and the requirements of high-end customers are met.

This invention relates to an online method for preparing an anti-oxidation coating on the inner wall of a seamless steel pipe, comprising the following steps: placing a steel billet heated to 1000°C to 1300°C on a piercing platform; performing a first piercing by moving the mandrel relative to the steel billet; performing a second piercing on the steel billet after the first piercing; during the first piercing, when the mandrel is submerged in the steel billet, spraying anti-oxidation powder onto the inner wall of the steel pipe using a powder spraying device. Using this online method for preparing an anti-oxidation coating on the inner wall of a seamless steel pipe, anti-oxidation substances can be sprayed onto the inner wall of the steel pipe simultaneously with piercing, solving the technical problem of severe oxidation of the inner wall of the steel pipe during the piercing process through online preparation. This avoids the oxide scale generated damaging the quality of the inner wall of the seamless steel pipe in subsequent piercing processes, avoids the need for additional grinding processes, and even avoids the scrapping of the steel pipe.

In a manufacturing method for a rolled metal strip, the method including rolling, by a rough rolling mill 70, a cast piece cast by a continuous casting machine (CC) 12, the CC 12 is configured to be capable of selecting an endless mode in which a cast piece cast into a first thickness X is rolled by the rough rolling mill 70 without being cut and a batch mode in which the cast piece cast into a second thickness Y thicker than the first thickness X is rolled by the rough rolling mill 70 after being cut. This provides a manufacturing method for a rolled metal strip and a rolling facility that can improve the productivity of the rolled metal strip in a continuous casting facility that uses both the endless mode and the batch mode compared with conventional techniques.

The invention relates to a plate shape control method in the rolling process of steel 30MnB5 for hot stamping forming. The plate shape control method in the rolling process comprises the working procedures of plate blank heating, rolling, cooling and coiling. In the cooling process, laminar cooling is used for cooling the strip steel to the coiling temperature, the cooling process is set as follows: cooling is performed in a sparse cooling mode, the cooling speed of the front section of laminar cooling is controlled to be 20-30 DEG C / S, the cooling speed of the rear section of laminar cooling is controlled to be 30-40 DEG C / S, and the total water amount of laminar cooling water spraying is set according to the ratio of the water amount of the front section to the water amount of the rear section of 1: 1.2-1: 1.4. The method is easy to implement, and the good strip shape control quality of the steel strip can be obtained through reasonable process design. And additional equipment and investment are not needed. By means of the method, the strip shape of the 30 MnB5 steel strip of the hot stamping forming steel of 5-10 mm is well controlled, the unevenness of the strip steel is not larger than 10 mm / m after the strip steel is flattened, and the wave shape judgment reduction amount and strip shape objection complaints caused by the poor strip shape are completely eradicated.

The application provides a continuous casting and rolling preparation method of a super-large caliber TA24 titanium alloy seamless pipe, which comprises the following steps: step one, preparing a hollow round ingot: proportioning prepared titanium alloy raw materials, and adopting an electron beam cold bed furnace to melt and prepare the hollow round ingot; step two, ingot heating: placing the hollow round ingot in a heating furnace for heating; step three, inclined rolling hole expanding: continuously rolling the heated hollow round ingot in an inclined rolling hole expander to obtain a mother pipe; step four, ingot secondary heating: conveying the mother pipe to a heating furnace for re-heating; and step five, rotary rolling hole expanding: conveying the heated mother pipe to a rotary rolling hole expander for rolling and forming, and heat treatment; through the continuous casting and rolling preparation method of the super-large caliber TA24 titanium alloy seamless pipe, the super-large caliber titanium alloy seamless pipe can be efficiently prepared and formed through continuous casting and rolling, the pipe production process is simplified, the pipe production cost is reduced, the pipe production cycle is shortened, the pipe production efficiency is improved, and the material utilization rate is improved.

The present application relates to a kind of induction heat supplementing method and its device for preventing magnesium alloy plate rolling from producing edge crack, comprising the following steps, step 1: according to numerical control console control rectangular coil position;Step 2: obtain the power required for induction heat supplementing magnesium alloy plate;Step 3: start power supply, complete the induction heat supplementing and rolling of magnesium alloy plate.The present application controls rectangular induction coil position and power according to the detected heat supplementing parameters, can realize the accurate control of magnesium alloy plate temperature;The device proposed in the present application realizes the cross-over superposition structure of induction coil by controlling the movement of ram in the width direction and thickness direction of magnesium alloy plate, can heat supplement magnesium alloy plate of different width and thickness;The present application effectively solves the situation that magnesium alloy plate appears crack due to low temperature at edge during rolling by induction heat supplementing, improves yield.

A process and apparatus of producing a product having a wrought structure. The process comprises the step of: applying heat and a compressive load simultaneously to an application area of a cold spray deposition preform to transform the comprising consolidated particle structure into a wrought structure, the compressive load being applied laterally to the application area. The application of compressive load and heat to the application area raises the temperature of the material of the preform in the application area to between the recrystallisation temperature and the melting point of the material.

The invention discloses a wide and thin steel plate with excellent low-temperature toughness for a 355MPa-grade low-temperature engineering structure and a manufacturing method of the wide and thin steel plate, and belongs to the technical field of low-carbon microalloyed steel production. The steel plate comprises the following chemical components in percentage by weight: 0.05%-0.08% of C, 0.2%-0.25% of Si, 1.45%-1.55% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.02%-0.04% of Nb, 0.010%-0.04% of Al, 0.003%-0.006% of N and the balance of Fe and inevitable impurities, and the total amount of other impurity elements is less than 0.05%. The manufacturing method comprises the steps of molten steel smelting, external refining and degassing, continuous casting, slab reheating, rolling and controlled cooling. The steel plate is low in cost, high in strength and toughness and capable of meeting the service safety of the steel plate for the engineering structure under the condition of-60 DEG C.

The invention relates to the technical field of titanium and titanium alloy processing, in particular to a preparation method of a titanium-copper alloy plate or strip, which comprises the following steps: selecting a Ti-5Cu alloy casting blank with the thickness of 60-200mm, the width of 600-2000mm and the length of Lmm; analyzing and measuring the phase transition temperature T1 of the Ti-5Cu alloy casting blank; the method comprises the following steps: coating the surface of a Ti-5Cu alloy casting blank with pure titanium or coating the surface of the Ti-5Cu alloy casting blank with an anti-oxidation coating to obtain an anti-oxidation blank, heating the anti-oxidation blank to T2 = T1 + (25-160) DEG C, and keeping the temperature for 10-60 minutes; carrying out hot rolling on the antioxidant blank subjected to heating and heat preservation at the temperature not lower than 700 DEG C; and the hot-rolled blank is subjected to cold rolling, and the titanium-copper alloy plate or strip with the thickness being 0.2-3 mm is obtained. The hot rolling process is carried out in the interval above the phase transition temperature of the Ti-5Cu alloy, it is avoided that when beta-phase region machining is finished, coarse grains are reserved in metal, and in the cold rolling process, rolling defects caused by work hardening and strip cold rolling are eliminated through vacuum annealing or protective atmosphere annealing, the alloy machining plasticity is recovered, and the strip cold rolling machining performance is improved.

The invention discloses a controlled rolling and controlled cooling process for improving ultralow-temperature impact toughness of high building steel and a structure optimization method, and relates to the technical field of alloy preparation. Comprising the following steps: preparing a high-rise building steel billet, and heating the billet to a recrystallization temperature interval; the heated steel billet is always in a coupling field of an electromagnetic field and an ultrasonic field in the whole rolling process before rolling, during rolling and after rolling; the pre-finished product steel is sequentially subjected to ultralow-temperature aging treatment and gradient tempering treatment; the macroscopic deformation resistance is reduced through the electromagnetic field, the microcosmic strain distribution is refined through the ultrasonic waves, and the grain refinement limit is broken through synergistically.

This invention discloses a short-process bar rolling method and system. The method includes the following steps: S1, heating the billet in a heating furnace; S2, descaling with high-pressure water; S3, completing eight rolling passes in rolling zone one; S4, performing multiple-length segmentation with a first flying shear; S5, performing four rolling passes in rolling zone two; S6, performing multiple-length segmentation with a second flying shear; S7, performing diameter reduction rolling on the bar using a KOCKS mill; S8, a third flying shear; S9, water cooling; S10, cooling; S11, shearing the bar to length; S12, finishing and annealing; S13, magnetic flux leakage testing. This invention can meet the requirements for bar shape and size as well as the requirements for flaw detection, achieving integrated bar heating, controlled rolling and cooling, and flaw detection while saving space. This invention can reduce the number of traditional bar rolling passes, realizing short-process bar production with small space requirements, low power consumption, customization, greenness, and low carbon emissions.

The invention discloses automatic constant-temperature reciprocating rolling equipment and process for a titanium alloy bar cogging mill, and belongs to the technical field of steelmaking continuous casting and rolling. The equipment comprises two rotatable movable metal detector devices, a feeding induction heating system and a discharging induction heating system, wherein the two rotatable moving type metal detector devices are oppositely arranged on the left side and the right side of a roller respectively, the feeding induction heating system is arranged on the front side of the feeding conveying roller way, and the discharging induction heating system is arranged on the front side of the discharging conveying roller way. By means of the rotatable movable metal detector device, the detection precision is improved, the device adapts to the production rhythm of a cogging mill, the steel throwing position can be controlled to be close to a roller as far as possible, the rolling efficiency is improved, the titanium blank temperature loss in the rolling process is reduced, and meanwhile the manual operation risk is reduced. In addition, the situation that the temperature of the head and the tail of the blank is not uniform is improved through the induction heating system, and therefore the temperature is kept constant in the whole rolling process.

The invention discloses a 430 stainless steel cold plate production method capable of reducing iron scale press-in, which comprises the following steps: S1, smelting and continuously casting raw materials to obtain a plate blank; s2, the plate blank is subjected to heating furnace heat treatment; s3, the plate blank is subjected to dephosphorization treatment; s4, the plate blank is subjected to hot rolling, the plate shape in the hot rolling process is controlled, and a hot rolled steel strip is obtained; s5, the hot rolled steel strip is subjected to annealing and acid pickling treatment; in the step S1, a plate blank is controlled to comprise, by weight, 0.03%-0.06% of C, 0.30%-0.40% of Si, 0.25%-0.40% of Mn, smaller than or equal to 0.038% of P, smaller than or equal to 0.01% of S, 16.00%-16.80% of Cr, smaller than or equal to 0.50% of Ni, 0.03%-0.05% of N and the balance Fe and inevitable impurity elements. The stainless steel scale press-in defect can be relieved, and therefore the stainless steel production quality is guaranteed.