60results about "Metal rolling arrangements" patented technology

The present invention relates to a casting-rolling process of magnesium alloy slab and its equipment. Said process includes the following steps: preheating magnesium alloy ingot, smelting said magnesium alloy ingot in smelting furnace with protective gas; transferring the molten magnesium alloy to front tank by means of runner rough, relaining constant temperature in front tank, feeding the molten magnesium alloy into casting-rolling machine by means of lip to make casting and rolling operation, finally using fine rolling machine to make warm-rolling and cold-rolling so as to obtain the finished product plate material with required thickness. Its equipment mainly includes smelting furnace, runner trough, front tank, lip, on-line mixed gas supply device and casting-rolling machine.

The invention relates to a residual stress control method of a hundred-meter steel rail, which belongs to the fields of prebending deformation control and composite straightening deformation control processes of the hundred-meter steel rail and the like. The invention adopts a method with universal rolling, cooling after rolling and composite straightening, and large-radian prebending is adopted for the hundred-meter steel rail in the cooling process after rolling, so that when the steel rail is cooled to the room temperature, the chord height is controlled in the range of 30-40mm. By combination of optimized straightening deformation rules of an 8+1 multi-roll straightening machine and the control of the curvature before straightening, the residual stress control method effectively controls the residual stress of the bottom of the rail after the hundred-meter steel rail is straightened, the residual stress values of the bottom of the rail are averagely reduced by 70MPa, all the residual stress values are less than or equal to 250MPa, and the straightness of the steel rail is improved, so that the qualification rate of the steel rail is improved, and the standard requirement of the hundred-meter steel rail is met.

The present invention provides a steel cooling control simulation system and method. A process control device is connected with cooling equipment simulation device, the cooling equipment simulation device includes a transmission fixed with steel bar, a cooling course temperature calculating device simulating the temperature measurement and a patrol demonstrator, an electric potentiometer, a photoelectric switch and a position locator for temperature display, the photoelectric switch is provided on the operation path of the steel bar. The course control device completes the optimization setting function to PLC control variable, PLC completes the real-time control function of the cooling simulation course, the cooling equipment simulation device executes the real switch and adjustment action of the simulation cooling line, and achieving the real-time data collection course. The cooling control course system is simulated by the hardware connection of each device and software cooperation, providing a pilot test device of simulation evaluation in order to improving and completing the control system.

A method of producing steel with reduced internal stress concentrations is disclosed. In an embodiment, hot steel is shaped by a rolling mill. The resultant steel product is bundled as soon as practicable and the bundle is allowed to cool. Vibration energy is applied to the bundle of steel product so that internal stress concentrations within the steel product are relieved. In an embodiment, a plurality of bundles are stored on a rack and the rack is vibrated, the vibrations being transmitted to the plurality of bundles so that undesired internal stress concentrations within the steel products are relieved. Alternatively, magnetics may be used to relieve the undesired internal stress concentrations within the steel products. Thus, improved steel is produced as well as improved steel that can be produced more rapidly than known techniques.

The invention provides a method for hot-rolling manufacture of ultra-pure ferrite stainless steel. The method for the hot-rolling manufacture of the ultra-pure ferrite stainless steel comprises the steps of heating, rough rolling and finish rolling, wherein the finish rolling step is that the reduction rate of each finish rolling machine frame is determined according to the following formula, a finish rolling machine comprises seven machine frames, the reduction rates of the first finish rolling machine frame, the second finish rolling machine frame, the third finish rolling machine frame and the fourth finish rolling machine frame are reduced, and the reduction rates of the fifth finish rolling machine frame, the sixth finish rolling machine frame and the seventh finish rolling machine frame are improved. By means of the method, the defect of rough stripes on the surface of the stainless steel caused by hot-rolling roller sticking is overcome, and stable batch production of the ultra-pure ferrite stainless steel is achieved.

The invention discloses a two-roll tandem pipe mill and a roll framework locking device thereof. The roll framework locking device comprises a pressing device and a side locking device. Rolls of the roll framework include a first roll and a second roll parallel to each other. After the roll framework is mounted into a main base, the side locking device is used for longitudinally locking the rolls of the roll framework, and the pressing device is used for pressing from the first roll to the second roll of the roll framework. The side locking device comprises a locking cylinder and a pressure-bearing backing plate, wherein the locking cylinder is arranged at the back end of the main base, and an extending end of the locking cylinder is a locking press head, a first bevel is formed on the locking press head, and a second bevel matched with the first bevel to lock the rolls longitudinally is formed on the pressure-bearing backing plate arranged at the back end of the roll framework. By the roll framework locking device, the problem of keeping horizontal rolling balance of the roll framework of the two-roll tandem pipe mill in the prior art is solved, stability of the roll framework in rolling is guaranteed effectively, and steel pipe rolling quality is improved further.

The invention provides metal glass micron foil and a preparation method thereof. The preparation method comprises the steps that metal and a metal glass plate or strip are overlapped; an overlapped material is heated till the temperature reaches the metal glass supercooled liquid phase region which is between the glass transition temperature Tg and the crystallization temperature Tx; and then rolling calendaring is conducted, and the metal glass foil with the micron-scale thickness, namely the metal glass micron foil, is obtained. According to the preparation method, the metal glass foil can be quickly prepared on a large scale, the cost is low, and operation is easy and convenient; and the metal glass micron foil prepared through the method has utilization potentiality in the fields suchas sensors, sewage treatment, electronic skins, flexible smart wear, electromagnetic shielding, radiation resistance, catalyzing and composite materials.

A aluminum base alloy containing boron and manufacturing method thereof, said alloy exhibiting good mechanical properties (such as high-temperature strength and creep strength) over a long period of time and also having a neutron absorbing capacity owing to boron present therein in the form of a compound without segregation. The alloy contains 0.5–10 mass % of boron with an isotopic element satisfying a relation of ¹⁰B/(¹⁰B +¹¹B)≦30%. said boron being present in the form of a boron compound which is 300 μm or below in size. The alloy is obtained by melting at a temperature in excess of 950° C. and cast at a temperature in the range of 800° C. to 950° C., in such a way that the molten metal is kept for 60–180° seconds until it cools from 950° C. to the casting temperature.

The invention relates to a method for improving the surface quality of a hot-rolling planishing mill set product, which is applied to the hot-rolling planishing mill set and can also be applied to an acid washing machine set. The method for improving the surface quality of the hot-rolling planishing mill is characterized in that strip steel between an uncoiler and an inlet steering pinch roll is transversely curved first in the planishing process of the hot-rolling planishing mill set on the strip steel, and iron scales attached to the surface of the strip steel are peeled off; and the surface of the strip steel is subjected to air blowing on one side of the strip steel, and the peeled iron scales are blown to the other side of the strip steel and sucked away by a dust suction hood which is arranged on the other side of the strip steel. The method obviously improves the surface quality of products, is simple and has low cost.

Disclosed is a simple method for manufacturing pure copper plates which does not involve cold forging or cold pressing after hot forging or hot pressing, or heat processing thereafter; also disclosed is the finely uniform pure copper plate which is obtained by said method, has low residual stress and excellent processability, and is especially suitable as a copper sputtering target material. Pure copper ingots of purity no less than 99.96 wt% are heated to 550-800 DEG C, and after hot pressing with a total press rates of 85% or more and a temperature at press completion of 500-700 DEG C, are quenched at a cooling rate of 200-1000 DEG C/min until the temperature reaches 200 DEG C or less from the aforementioned temperature at press completion.

The invention discloses a strip shape signal error compensation method based on strip shape detection roll installation accuracy, which comprises the following steps of: constructing a strip shape signal compensation model aiming at strip shape detection roll installation errors based on a geometrical relationship between a strip shape detection roll and a guide roll or a winding drum and a cold rolled steel strip shape detection theory; and aiming at two installation ways, i.e. a fixed wrap angle way and a dynamic wrap angle way, establishing a corresponding tensile stress dynamic deviation calculation formula to compensate online strip signals of cold rolled steel strips in real time. By considering the influence of the strip shape detection roll installation accuracy on original strip shape signals, the online strip shape detection accuracy of a contact-type strip shape detection instrument is improved to the utmost extent, the actual strip shape situation of the online cold rolled steel strips is more really reflected, the strip shape control performance of a rolling mill is improved, and stable, reliable and real-time strip shape data can be provided for a strip shape closed-loop control system.

A forming mold having a base member 10, and a resin layer 20 formed on the base member 10. The base member 10 has a rigidity higher than that of the resin layer 20. On the surface of the base member 10, the resin layer 20 having a thickness (Tb) of 1 mm or more is formed through lining or a similar technique. Then, the surface of the portion of the resin layer 20, the portion to be serve as a forming surface, is machined (e.g., end-milled) for finishing so that the thickness of the portion is reduced from Tb to Ta, whereby a forming surface P1 is completed. The forming surface P1 has a form accuracy as high as that attained by a forming surface of a forming mold produced through machining without employing a resin layer.

The invention discloses a roll gap adjusting and fixing device. The roll gap adjusting and fixing device comprises adjusting devices installed on two sides of a cone box boy. The adjusting devices installed on the two sides of the cone box boy are connected through an adjusting screw rod. A shaft sleeve type pulley installed through an adjusting nut is further arranged on the adjusting screw rod. An eccentric sleeve sliding sleeve is formed in the shaft sleeve type pulley. According to the roll gap adjusting and fixing device, the service life is prolonged through the adjusting nut, requirements for bearing of impulse load of rolling large-size wire stocks and requirements for low-temperature rolling also can be met, a roll gap is locked at a set value all the time through a positioning bolt, the boundary dimension of rolled wire stocks is ensured, and substandard products caused by changes in the roll gap never exist since the roll gap adjusting and fixing device is additionally arranged.

The invention relates to the field of plate-strip cold rolling mills, and discloses an eccentricity compensation method for a cold rolling mill upstream rolling mill roll. The method comprises the steps that firstly, a rotation angle of an upstream rolling mill roll is calculated; secondly, a strip outlet thickness difference measured by an outlet thickness gauge is used as an analytical signal source, and a fundamental wave of a signal of which the wave length is the same as the perimeter of the upstream rolling mill roll and amplitude values and phase positions of all subharmonic components are obtained through the Fourier analysis; lastly, an amplitude value and phase position of the needed compensation adjustment amount is obtained through calculation. According to the eccentricity compensation method for the cold rolling mill upstream rolling mill roll, the problem that the thickness precision of cold rolling products is poor caused by cyclical fluctuation of the incoming material thickness can be effectively solved, therefore, the quality and the yield of the cold rolling products are correspondingly improved, and meanwhile the economic benefit of producers is improved.

A method for continuously rolling steel workpieces into finished round steel, comprising rolling workpieces heated to a high temperature of about 650-1000°C in successive first and second rolling passes, the first and second rolling passes respectively bounded by two work rolls and dimensioned to collectively reduce the cross-sectional area of ​​the workpiece by at least about 20-55%, with an associated effective strain pattern dominated by a maximum effective strain concentration in the central region of the cross-section, and While the effective strain pattern remains dominated by the maximum effective strain concentration in the central region of the cross-section, continue rolling the workpiece in at least the third and fourth consecutive passes, each consisting of at least Three work rolls are defined and dimensioned to collectively reduce the cross-sectional area of ​​the workpiece by no more than about 4-25%.

The invention relates to the field of steel rail materials, in particular to a steel rail for a high-speed railway and a manufacturing method thereof. According to the steel rail for the high-speed railway, based on the total weight of a steel billet of the steel rail for the high-speed railway, the steel billet comprises 0.40-0.60% of C, 0.15-0.35% of Si, 0.75-0.95% of Mn, and the balance Fe andinevitable impurities. The manufacturing method comprises the following steps: rolling the steel billet subjected to heat preservation treatment to obtain a waste heat steel rail, and carrying out accelerated cooling heat treatment on the head part of the waste heat steel rail, specifically, the cooling start temperature of accelerated cooling heat treatment is higher than 800 DEG C, the cooling speed is controlled to be 3-5 DEG C/s, accelerated cooling is stopped when the temperature is reduced to 390-410 DEG C, and then the steel rail is air-cooled to a room temperature. The steel rail has excellent comprehensive wear performance.

The invention discloses a method for improving double bulges at an edge part of a broadened intermediate slab in a thick plate rolling process. The method comprises the following steps: (1) steel rotates to enable the width direction of a plate blank to be accordant with the direction of a rolling center line; (2) the rolling broadening is performed in the width direction of the plate blank; and (3) the steel rotates to enable the length direction of the plate blank to be consistent with the rolling center line, and vertical rollers arranged at the two sides of the width direction of the plate blank are adopted to apply lateral pressure on the side edge of the plate blank to eliminate double bulges at the edge part; the steps (1-3) are repeated until the plate blank is broadened to a target width; and the steel rotation is performed again for the plate blank, so that the length direction of the plate blank is consistent with the direction of the rolling center line, and the fixed-width rolling is performed for the plate blank to reach the thickness of a finished product. The method for improving double bulges at the edge part of the broadened intermediate slab in the thick plate rolling process can eliminate the double-bulge deformation at the edge part of the steel plate, so that the plane shape of the steel plate is improved, the yield of the finished steel plate is improved, and the production quality of the finished steel plate is improved.

The invention discloses a lower spraying and cooling device arranged between finishing mill frames. The lower spraying and cooling device is arranged below strip steel on the inlet side of the finishing mill frame, and comprises a collecting pipe which is arranged along the direction vertical to the running direction of strip steel, a water inlet pipe arranged on the collecting pipe, a plurality of discharging and spraying pipes, and a plurality of plunger devices; the plurality of discharging and spraying pipes are uniformly distributed above the collecting pipe along the axial direction of the collecting pipe; each row of the discharging and spraying pipes comprises a plurality of spraying pipes which are distributed along the radial direction of the collecting pipe, and each spraying pipe is communicated with the collecting pipe through a lower port; and the plurality of plunger devices correspond to the plurality of discharging and spraying pipes. Each plunger device comprises a plunger pipe with one sealed tail end, and a plunger which is arranged in the plunger pipe; the plunger pipe is provided with holes which are communicated with the spraying pipe and a water inlet whichis communicated with the collecting pipe; and the plunger can slide along the axial direction of the plunger pipe so as to block the water inlet.

The invention discloses a method of improving wedge control of strip steel during two-phase zone rolling. The method comprises the following steps of (1) load distribution: a load distribution mode adopts distribution with a reduction rate, and under the condition that the convexity of a plate is good, rolling forces of F1-F4 racks are strengthened, rolling forces of F5-F7 racks are weakened, andrack rolling forces of the racks from F1 to F7 are gradually weakened; (2) short stroke control on a guide plate and a vertical roller; and (3) convexity selection value range: a convexity value of the strip steel is a difference value between a thickness of the center of the strip steel and an average value of a thickness of the position, 40mm away from the edge, of the strip steel, and a selected convexity range is 27-32 microns. The method provided by the invention solves the technical problem of wedge control during two-phase zone rolling of CSP process rolling, greatly improves the wedgedprecision of the steel and improves the quality precision of a subsequent procedure.

The invention discloses a carrying blank rolling method for producing a steel plate of the 6mm-thickness limit specification through a medium-thickness plate. A blank B of the conventional productionspecification is adopted for carrying a steel plate blank A of the limit specification, the blank B and the steel plate blank A are fed in a heating furnace at the same time to be heated, and the blank B and the steel plate blank A are separated through a separator after being discharged out of the furnace to be rolled respectively. Compared with the prior art, the method has the beneficial effects that in the carrying blank rolling method for producing the steel plate of the 6mm-thickness limit specification through the medium-thickness plate, the method that the conventional blank carries the blank of the limit length specification to implement carrying blank heating and rolling is completed through discharge blank separation is adopted, the problem that blank specifications are limitedand cannot be suitable for the normal blank mounting size of the heating furnace can be solved, meanwhile, the rolling danger existing in rolling of steel plates of the limit thin specification and damage to equipment are avoided, and existing thick plate production equipment is utilized for producing the steel plates of the limit thin specification.

The invention relates to a cold rolling mill with a feeding device and a discharging device. The cold rolling mill includes a cold rolling mill body, a feeding frame and a discharging frame are arranged at the front end and the rear end of the cold-rolling mill correspondingly. The feeding frame is provided with a discharging platform, a side plate A is arranged on one side of the discharging platform, an obliquely-arranged slide carriage is arranged on the other side of the discharging platform, a fixing plate is arranged at the lower end of the slide carriage, a plurality of supports are arranged on the side, close to the fixing plate, of the discharging platform side by side, and a roller is connected between each support and the fixing plate. The discharging frame is provided with a material receiving platform, the material receiving platform is obliquely arranged in the mode that one side is high and the other side is low, a side plate B is arranged on the high side, and a material receiving frame is arranged on the low side; the cold rolling mill is simple in structure and convenient to manufacture, materials can be rapidly and conveniently placed in the cold rolling mill tobe rolled, the rolled materials automatically enter the material receiving frame to be stacked, the labor cost is reduced, the labor intensity is relieved, and the production efficiency is improved.

The invention provides a short-process preparation method of a Ti-Al-V-Fe alloy seamless tube. The method is characterized by comprising the following steps: 1) preparing materials; 2) mixing the materials and briquetting; 3) putting the materials into an electron beam gun EB furnace; 4) performing vacuum melting to obtain a Ti-Al-V-Fe alloy round ingot; 5) drilling centering holes in two ends of the ingot, and feeding the ingot into a two-roller skew rolling mill for skew rolling and perforating; 6), feeding the ingot to a three-roller continuous rolling machine for continuous rolling; 7) carrying out heating and sizing to obtain a seamless tube; 8) carrying out annealing treatment to obtain the Ti-Al-V-Fe alloy seamless tube. The Ti-Al-V-Fe alloy seamless tube has a uniform metallographic structure and are few in high-density and low-density inclusions and high in purity, the technological process is short, the mechanical property is superior to that of the prior art, the comprehensive yield is increased to 85% or above, the production cost is reduced by 20%-30%, and obvious market application prospects are achieved.