455results about "Cooling beds" patented technology

The invention belongs to the field of production machining of special steel of the metallurgical industry, and relates to a rolling production method capable of reducing hardness of 42CrMo. A 42CrMo casting blank serves as a raw material, and the method sequentially comprises following working procedures of heating, descaling, a rough rolling, cooling after rough rolling, continuous rolling, through water cooling, bar reducing sizing mill finish rolling, cooling bed cooling and finally obtaining a finished product bar; by the adoption of the technology, the site operation is simple, online automatic control is easily achieved, and operation labor intensity of a worker is reduced; through the online controlled rolling controlled cold technology, straightness of the 42CrMo steel grade is greatly improved; the subsequent heat treatment technology (annealing technology) is reduced, production cost is saved, the production period is shortened, and the steel market competitiveness is improved; the hardness value range of the obtained 42CrMo steel ranges from 220 HBW to 260 HBW; a metallographic structure comprises ferrite and pearlite; the banded structure is smaller than or equal to 2 levels; the grain size is larger than or equal to 8 levels; and the mechanical property can meet the national standard and user needs.

A hot-rolled wire rod: the wire rod being a hot-rolled wire rod 5.0 mm or more in diameter, containing in mass C: 0.6 to 1.0%, Si: 0.1 to 1.5%, Mn: 0.3 to 1.0%, P: 0.02% or less, and S: 0.02% or less; not less than 90% of the wire rod in area percentage being composed of a pearlite structure; and the mechanical properties of the wire rod 4 m in length satisfying the following expressions (1) to (4),

• • (1) TS*−30≦Average value of tensile strength (TS_AV in MPa)≦TS*+30, where, TS*=400×{[C]+([Mn]+[Si])/5}+670 and the elements in square brackets [ ] in the equality mean the contents of relevant elements in percentage, (2) Standard deviation of tensile strength (TSσ)≦30 MPa,
  • (3) Average value of reduction of area (RA_AV)>35%, (4) Standard deviation of reduction of area (RAσ) ≦4%. A hot-rolled wire rod according to the present invention is incomparably excellent in wire drawability and brakes less frequently than a conventional wire rod even when it is processed as hot-rolled with heat treatment such as patenting treatment omitted.

The invention discloses a material distribution method for a cold bed, and belongs to the field of automatic control. The material distribution method for the cold bed comprises the following steps: (1) setting a material distribution rule table; (2) conveying a sawn material to the cold bed, and tracking and transmitting the property information of the material to a PLC (Programmable Logical Controller) in a cold bed area; (3) determining the type of the material by comparing whether the property information of the material is consistent with set property information in the material distribution rule table or not by using the PLC to realize classification of the material; (4) controlling the stepping times of the cold bed according to the number of material distribution interval teeth and the number of non-fixed-length interval teeth in the material distribution rule table to realize the determination of the position of the material. According to the material distribution method for the cold bed, by tracking the property information of the material, the property information of a finished product material can be comprehended in real time, and full-automatic control of the material distribution of the cold bed is well realized. By using the method, data management can be performed conveniently, the manual workload is lowered greatly, the production efficiency is increased, and the stability of a system is ensured.

A product handling system comprises a support structure defining a pair of stationary inverted first channels with downwardly facing open sides. At least one cylindrical drum is interposed between each of the first channels and an underlying receiver. The drums are rotatable about their axes, with their surfaces arranged to close the open sides of the respective first channels. The drum surfaces are interrupted by second channels, with the first and second channels and the drum axes being arranged in a parallel relationship. Successive product lengths are alternately delivered longitudinally into one and then the other of the first channels. The drums are rotated about their axes resulting in the thus delivered product lengths being sequentially: (i) temporarily retained in the first channels by the rotating drum surfaces; (ii) deposited from the first channels into the second channels when the second channels rotate into radial alignment and communication with the first channels and (iii) downwardly deposited from the second channels to the receiver when the second channels rotate to discharge positions over the underlying receiver.

A side-spray scavenge system for the laminar-flow cooling water on the rolled high-strength low-alloy steel is composed of a conveying roller way for conveying the rolled steel on it, and a laminar-flow cooling unit with at least a group of side sprayers arranged at both sides of said roller way, connected to water inlet tube, and with at least one nozzle.

The invention relates to a manufacturing process of a track beam of a cooling bed dolly in a hot rolled plate line, which is characterized in that the invention comprises a welding process and a machining process; the welding process is that the welding is achieved according to the structures of parts; separate shaping and correcting are carried out after the welding is achieved, and the assembly welding and forming are carried out; the machining process is the processing of the track plate by sections before the welding; an expansion seam is preserved at butted position and is aligned and levelled by grinding; after the assembly welding and forming of the track beam, the shaping and correcting are carried out, and a bottom surface and a keyway, etc. are integrally processed through an aging disposal. The invention ensures the qualified rate of the products, saves the occupied time of the large machine tool equipment, reduces the manufacturing cost, and shortens the manufacturing period.

The present invention relates to a vertical rolling method of wide flange steel and its equipment, belonging to the field of metal rolling technology. Said method includes the following steps: billet heating, des caling, blooming, cropping and rolling so as to obtain the rolled material with web plate and flange. Said invention also provides the concrete operation steps of said rolling process.

The invention discloses an on-line control method of a banded structure and hardness of gear steel. The method comprises the steps: controlling the finishing temperature of a gear steel rod at 900-980 DEG C, controlling the cooling speed of the gear steel rod in a three-stage cooling manner after rolling: air-cooling the high temperature gear steel rod after the rolling, reducing the surface temperature of the rod to 800-830 DEG C, and controlling the difference between the core temperature and the surface temperature of the rod to be within 150 DEG C, performing forced air cooling on the precooled rod, controlling the surface temperature of the rod, air-cooling to 620-680 DEG C, keeping the rod after the forced cooling warm, slowly cooling, and stopping cooling for 15-50min. The invention further discloses a post-rolling on-line controlled cooling bed device. A cooling bed system of the device is formed by combining three stepped cooling beds, namely a precooling bed, an air cooling bed and a slow cooling bed. The method can control the banded structure within a second stage, the structural homogeneity of the gear steel rod is improved, and the hardness requirements during blanking of the gear steel rod are met.

The invention provides a method for fast cooling low-carbon hot-rolling small H-shaped steel, belonging to the technical field of metal pressure processing. The method for fast cooling low-carbon hot-rolling small H-shaped steel is mainly based on the improvement of a cooling-after-rolling device and cooling is carried out by six stages in a high-pressure aerial fog cooling way, wherein each stage comprises four cooling control modules which are respectively arranged at the upper part, the lower part and two sides and are independently controlled and regulated by electromagnetic valves; controlled cooling is performed by regions, and different cooling methods are performed for cooled parts so that a flange part and an R part have larger temperature drop extent so as to fast and uniformly cool the positions of the H-shaped steel. By applying the fast cooling method to Q235 and Q345, the invention enables an H-shaped steel product to have tiny texture grains and larger mechanical property enhancement up to 50 MPa; in addition, the fast cooling method enables the properties of the positions of the H-shaped steel to be more uniform, reduces the cooling wave bending of the H-shaped steel product and enhances the finished product ratio of the H-shaped steel product.

The invention discloses a production method for improving low temperature impact property qualified rate of high strength ball flat steel, which consist of steps of rough rolling, finish rolling, final rolling and cooling after rolling. The web temperature of the final rolling is ranging from 870 DEG C to 930 DEG C and the ball-end temperature is ranging from 910 DEG C to 990 DEG C. For cooling after rolling, air cooling is adopted. By controlling the final rolling temperature and speed of the cooling after rolling, the invention eliminates or reduces granular bainite and widmanstatten in the microstructure of the ball flat steel, thereby greatly improving the low temperature impact property qualified rate of the high strength ball flat steel.

The invention relates to a cooling-bed hydraulic stepping and tread control device which at least comprises a hydraulic cylinder block for driving a cooling-bed movable rack beam to move back and forth, wherein the hydraulic cylinder block is composed of a stepping cylinder and a tread cylinder which are connected in series; the two cavities of the stepping cylinder and the two cavities of the tread cylinder are respectively communicated with the corresponding outlets of a cartridge valve bank; the inlet of the cartridge valve is communicated with an electrohydraulic proportion direction valve; and the electrohydraulic proportion direction valve is used for controlling the stepping cylinder and the tread cylinder of the hydraulic cylinder block. The invention adopts the structure of the proportion direction valve and the cartridge valve, and satisfies the requirements for quick speed control and stability. The speed is adjustable, and the invention realizes the control on the stepping cylinder and the tread cylinder by using only one proportion direction valve, thereby integrating the hydraulic stepping control and the hydraulic tread control into a whole. The cooling-bed hydraulic stepping and tread control device of the invention has the advantages of few elements, simple system structure, low cost, convenient electric control and maintenance, safety and reliability.

The invention relates to a method for automatic transferring sizing steel through longitudinal double row in steel bar production, belonging to pressure processing field. The technical projection is as that: it employs steel bar producing line as transferring device and photoelectric switch as checking signal sensor; the second pair of butting damper is installed to form butting base level with the first butting damper; the lower of butting roll passage is equipped with transferring vehicle; the photoelectric switch is used to check out the head signal of sizing steel in the first row and end signal of sizing steel in the second row, the transferring vehicle transfers said steel to butting roll passage through time-delay and transfers sizing steel to transportation chain bed. The invention can transfer sizing steel of two rows simultaneously, which increases production rate by about 78.5% and avoids problems in roll speeding and overload cold shearing. The method is characterized by easy accomplishment and low cost.

The invention relates to a straight teeth billet feeding mechanism of a square billet turn over cooling bed, pertaining to the technical field of machine. Eccentric drive and straight teeth are the keys of the technology; A V teeth and a straight teeth A are integrated as a whole; the lower end face of the V teeth and the upper end of the a V teeth beam are tightly fastened; A U teeth and a straight teeth B are integrated as a whole and the U teeth and a U teeth beam are tightly fastened; the V teeth beam and the U teeth beam are adjustably connected with two rolling wheels which are adjustably connected with two upper angles of a cradle; a cradle base angle and a cradle pull rod, the cradle pull rod and a cradle eccentric bushing, the lower end of the V teeth beam and a V teeth pull rod, the V teeth pull rod and a V teeth eccentric bushing, the lower end of the U teeth beam and a U teeth pull rod and the U teeth pull rod and a U teeth eccentric bushing are all adjustably connected respectively. The cradle eccentric bushing, the V teeth eccentric bushing and the U teeth eccentric bushing are all connected with a driving shaft by a key and the driving shaft is tightly fastened with an axle of a driving device. The straight teeth billet feeding mechanism has more than two sets and the eccentric phase difference of the V teeth eccentric bushing and the U teeth eccentric bushing is 180 degrees while the eccentric phase difference of V/U teeth eccentric bushing and the cradle eccentric bushing is 90 degrees. The straight teeth billet feeding mechanism of the invention is used for billet supplying of the turn over cooling bed and has the advantages of simple structure, energy saving, manpower saving and good effect.

The invention relates to a cold bed which is suitable for the cooling of coils, medium and heavy plates, bars and the like after being heated. The movable tray stack type material cold bed is characterized by comprising steel plate downgoing stacks, steel upgoing stacks and conveying dollies, wherein the steel plate downgoing stacks and the steel plate upgoing stacks are sequentially arranged from a feed end to a discharge end; the left sides and the right sides of the steel plate downgoing stacks and the steel plate upgoing stacks are respectively provided with a heat exchanger; the steel plate upgoing stacks have the same structure as that of the steel plate downgoing stacks; the lower end parts of the steel plate downgoing stacks and the steel plate upgoing stacks are provided with conveying dolly passages, and the conveying dollies are positioned in the conveying dolly passages; and the steel plate downgoing stack comprises a fixed frame, an annular moving mechanism, a mobile tray, a roller group and a steel plate conveying motor. The cold bed has the characteristics of high space utilization ratio and sensible heat recovery.

A hot-rolled seamless steel pipe on-line cooling accelerator and a method thereof are characterized in that an opposite tapered roller way set is divided into two roller sets and each set is provided with a set of horizontal revolving gear and a set of electric element control device below the opposite tapered roller way; therefore, each roller way set can form the set with changeable angle and the length of each roller way set with changeable angle is at least equal to the length of the manufactured steel pipe. The usage method is that by changing the angle of the roller way with changeable angle, the motion type of the hot-rolled seamless steel pipe is changed from horizontal advance to spiral advance after the hot-rolled seamless steel pipe thoroughly pass through a sizing mill. By improving the conventional roller way, the hot-rolled seamless steel pipe on-line cooling accelerator can be manufactured and by changing the advance type of the hot-rolled seamless steel pipe, even heating of the hot-rolled seamless steel pipe along lengthwise direction and circumferential direction can be ensured; therefore, the pipe can be prevented from being bent.

The invention provides a middle thick plate production line and a production method. The middle thick plate production line comprises a main rolling line comprising a main rolling line output roller, a shear line comprising a shear line input roller and a middle roller arranged between the main rolling line and the shear line, and the middle roller is linearly connected with the main rolling line output roller and the shear line input roller respectively. The main rolling line and the shear line are directly connected by virtue of the middle roller, a motherboard produced by the main rolling line can directly pass through the middle roller and enters the shear line to be sheared, the yield can be increased, and the quantity of the motherboards entering a cooling bed component can be reduced, so that the service efficiency of the cooling bed is improved, and the production efficiency of the middle thick plate production line is further improved.

The invention discloses a billet turn-over cooling bed device and belongs to the field of metallurgical equipment. The billet turn-over cooling bed device comprises a transmission device and a turn-over mechanism, wherein the transmission device drives the turn-over mechanism to turn over billets, the transmission device comprises a main transmission device and a constant-speed transmission set device, the main transmission device transmits torque to the constant-speed transmission set device, the constant-speed transmission set device is connected with the turn-over mechanism through a coupler, the turn-over mechanism comprises a plurality of transmission shafts distributed in parallel, the ends of the transmission shafts are connected to the coupler, tooth-shaped gears are evenly distributed on each transmission shaft, the tooth-shaped gears on every two adjacent transmission shafts are distributed in the same way, and the tooth-shaped gears on every two adjacent transmission shafts are staggered in position. With the device, hot square billets can be turned over, evenly cooled and automatically straightened efficiently, evenly and stably, and therefore the billets can be cooled sufficiently, the quality of the billets and smooth conveying of the billets can be guaranteed, and it is guaranteed that the tooth-shaped gears can support the tooth faces of the billets to normally turn over the billets.

The invention discloses a continuous casting billet hot delivery and offline system comprising a continuous casting machine discharging roller (1), a steel casting machine (2), a hot delivery roller (3), a warming roller (4), a casting blank insulation bed (7) and a hot delivery rolled steel roller (10). The steel casting machine (2) can transport casting blanks on the continuous casting machine blanking roller (1) to the hot delivery roller (3) or to the warming roller (4); the warming roller (4) deliveries the casting blanks to the casting blank insulation bed (7), and the casting blanks onthe casting blank insulation bed (7) can be transported to the hot delivery roller (3), and the hot delivery roller (3) transfers the casting blanks to the hot delivery rolled steel roller (10). The continuous casting billet hot-feeding and the offline system can control the surface temperature of the casting blanks between 550 DEC C to 650 DEG C, thereby meeting the requirements of the steel rolling process; in addition, the casting blanks can be temporarily stored in case of the roller change and the small fault on the rolling steel production line. The continuous casting billet hot deliveryand offline system has the functions of improving the casting blank hot delivery and reducing the casting blank offline directly.

The invention discloses a non-going-forward device for a small-pitch stepper cooling bed, and relates to hot-rolled steel pipe cooling equipment. The invention comprises a fixed rack, a movable rack and a transmission mechanism, wherein the movable rack is supported by two groups of No.I eccentric wheels, and a group of No.II eccentric wheels drive the movable rack through a connecting rod, a lever, a pull rod and a rocker; and a group of eccentric wheels of the two groups of No.I eccentric wheels and the No.II eccentric wheels are coaxial, and a motor is driven by a speed reducer, so that the movable rack moves along the elliptical trajectory. The invention is characterized in that the pull rod between the lever and the rocker is connected with a hydraulic cylinder in series. The invention solves the problems that hot steel pipes bends and deforms to affect the quality of the steel pipes when the steel pipes need to stay on the cooling bed. When the steel pipes stay on the cooling bed, the steel pipes can roll in the rack of the cooling bed and can not go forward, so that the steel pipes can be straightened when being cooled.

The invention discloses a method and device for improving super-rapid cooling evenness of a hot rolled steel plate and belongs to the technical field of metallurgy. The device for improving super-rapid cooling evenness of the hot rolled steel plate comprises a water curtain cooling mechanism, a high-density straight collector cooling mechanism, a super-rapid cooling mechanism and a gas water atomization cooling mechanism. The water curtain cooling mechanism, the high-density straight collector cooling mechanism, the super-rapid cooling mechanism and the gas water atomization cooling mechanism are arranged at the upper end and the lower end of the steel plate respectively. According to the method and device for improving super-rapid cooling evenness of the hot rolled steel plate, a collector is segmented, so that different portions are controlled respectively and cooling evenness is improved.

The invention relates to a method for producing a hot-rolling U-shaped steel sheet pile with a residual stress less than 100 MPa, which comprises the steps of: carrying out smelting, continuous casting and rolling; conveying to a cooling table for cooling, wherein the cooling speed is controlled within 0.5-8 DEG C/s and the cooling temperature, i.e., the temperature before straightening, is controlled at 100-300 DEG C; and straightening at a temperature of 100-300 DEG C. The method for producing the hot-rolling U-shaped steel sheet pile with the residual stress less than 100 MPa has the characteristics that: through controlling the residual temperature of the steel sheet pile before straightening and adopting a straightening process, the residual stress of the hot-rolling U-shaped steel sheet pile is effectively controlled, and the production cost is lowered, and the residual stress is less than 100 MPa, so that the effect of the hot-rolling U-shaped steel sheet pile used for piling is effectively enhanced; in addition, the method is simple to operate and is beneficial to popularization.

The invention provides a gear steel banded structure control process, and belongs to the technical field of ferrous metallurgy manufacturing. The process comprises the steps of steel billet heating, rough rolling, intermediate rolling, primary water passing cooling, finish rolling, secondary water passing cooling and slow cooling. The finish rolling temperature is set in an austenite non-recrystallization temperature area, ferrite grains are more refined after phase change, and the banded structure level can be effectively reduced; water passing cooling is carried out on a steel billet beforeand after finish rolling, and the metallographic structure and the surface quality of a product can be improved; rapid cooling is carried out before slow cooling after finish rolling, generation of proeutectoid ferrite can be effectively inhibited, diffusion of carbon is inhibited, the steel billet is rapidly cooled to a pearlite phase change area, and formation of a banded structure is reduced; the heated steel billet is subjected to heat preservation operation, component segregation of a steel billet material can be homogenized, and the banded structure is improved; and due to the arrangement of an injection channel and an injection angle in a water passing cooling device, the water passing resistance borne by the surface of the steel billet can be reduced, and the cooling efficiency isimproved.

The invention relates to a coil rod production process, in particular to a production process of a major-diameter coil rod for machine manufacturing. The heating time lasts 2.25 hours to 3 hours, and the heating speed ranges from 9 min/cm to 12 min/cm during the heating of a steel billet; the inlet temperature of a No. 0 rolling mill is controlled within the scope ranging from 950 DEG C to 1000 DEG C in a rough rolling procedure; the outlet temperature of a No. 11 rolling mill is controlled within the scope ranging from 1000 DEG C to 1050 DEG C in the medium rolling procedure; the outlet temperature of a No. 13 rolling mill is controlled within the scope ranging from 1050 DEG C to 1100 DEG C in the pre-finish rolling procedure; before the CCR rolling procedure, a rolled piece is led out from the pre-finish rolling procedure and enters a CCR rolling machine after being cooled in No. 4 and No. 5 water tanks, and the inlet temperature of the rolled piece in the CCR rolling machine is lower than 850 DEG C; before the coiling procedure, the rolled piece is cooled in a No. 6 rolling machine after exiting the CCR machine, and the temperature of the rolled piece is lower than 800 DEG C. The major-diameter coil rod for the machine manufacturing can obtain the major-diameter coil rod which has mechanical properties of excellent organization and deep processing, has the advantages of no surface scratch and complete rolling shape and is used for machine manufacturing.

The invention provides a novel steel feeding transmission mechanism of a bar cooling bank. The mechanism completes automatic alignment to a workpiece, and can reduce the manufacturing cost and production cost of a device, reduce the maintenance cost of the device while ensuring normally steel feeding. The mechanism comprises a hydraulic cylinder, a transmission connecting rod, a crank and a lifting apron plate, wherein the crank is connected with the lifting apron plate. The novel steel feeding transmission mechanism is characterized in that the transmission connecting rod is adjustable; a piston rod of the hydraulic cylinder is in axial connection with the transmission connecting rod; the other end of the transmission connecting rod is connected with a pull rod; and the hydraulic cylinder and the transmission connecting rod are arranged rightly under the pull rod.