91results about "Forging/pressing devices" patented technology

The die changing apparatus for a plate reduction press machine, comprises an upper die support holder 28a and a lower die support holder 28b that are arranged vertically on opposite sides of a transfer line, and support holder guide rails 31 installed on the upper die support holder and extending substantially horizontally in the lateral direction of the transfer line, and an upper die 29a and a lower die 29b are mounted on the upper and lower die support holders, respectively using the rollers onto the dies, fixing devices 30 that fix the upper and lower dies on the upper and lower die support holders, respectively, die fastening members 38 which are placed on each side of the upper and lower dies, opposite each other in such a manner that they can be fastened to both dies, and a die changing mechanism that can move one of the die fastening members in a direction perpendicular to the transfer line.

A method for producing a wide steel strip using thin slab continuous casting and rolling by the following steps a) casting a molten steel into a thin slab having a thickness of between 50 and 90 mm; b) cutting; c) soaking; d) heating by electromagnetic induction; e) descaling; f) rolling; g) cooling with laminar flow; and h) coiling. The method can effectively control the solution and precipitation of carbon, nitrogen, and sulfide in steel with a low cost. The process is easy and flexible, and steel can be produced in a wide range of categories. Further provided is a system for producing a wide steel strip with thin slab continuous casting and rolling.

A rolling method in a rolling line, to obtain strip with a thickness varying from 0.7 mm to 20 mm, for steel which can be cast in the form of thin slabs with a thickness from 30 mm to 140 mm, the line includes a continuous casting device; a tunnel furnace for maintenance/equalization and possible heating; a rolling train having a roughing train and a finishing train; a rapid heating unit, with elements able to be selectively activated, interposed between the roughing train and the finishing train. For each lay-out of the rolling line, the position of the rapid heating unit which defines the number of stands which form the roughing train, disposed upstream of the unit, and the number of stands which form the finishing train, disposed downstream of the unit, is calculated as a function of the product of the thickness and speed of the thin slab.

The invention belongs to the technical field of processing of titanium alloy materials, and relates to a processing method of an SP700 titanium alloy sheet for superplastic forming. The processing method comprises step I, carrying out heating number casting around a beta phase transformation point, and carrying out water cooling to obtain an intermediate billet; step II, carrying out first hot rolling, so as to obtain a first hot rolled plate blank; step III, carrying out second hot rolling, so as to obtain a second hot rolled plate blank; step IV, carrying out intermediate annealing treatment; step V, carrying out cold rolling, so as to obtain a hot rolled plate blank; and step VI, carrying out annealing treatment on a finished product, so as to obtain the SP700 titanium alloy sheet of which the thickness is 0.5 mm to 1.2 mm. According to the processing method, operation is simple, the technology is stable and controllable, and the prepared SP700 titanium alloy sheet is uniform in structure, fine in grains and good in performance consistency, and meets the relative technological requirement of superplastic forming.

A high-quality hot rolled steel sheet is manufactured with a high production efficiency and a low cost, from a long, hot slab, using a combination of continuous casting facilities and a plate reduction press machine.

The invention discloses a magnesium/aluminum/titanium composite board cladding-rolling method. According to the method, a cladding layer is used for the composite board during rolling, and through shape optimization of upper and lower cover plates of the cladding layer and design of rolling process parameters, the cladding layer and the cladded composite board can achieve coordinated deformation during rolling, so that the deformation behavior of the cladded composite board can be effectively restrained, the composite interface of the composite board is straight, and the bonding strength of the composite board is improved; the cladding layer can effectively reduce invasion of impurities and harmful gas to the composite interface, so that the bonding strength of the composite board can be further improved; and meanwhile, the use of the cladding layer can slow down loss of heat, so that metal is easy to deform during rolling.

A tungsten wire containing 1 to 10% by mass of rhenium has a point which indicates a 2% elongation within a quadrangle formed by joining points with straight lines, where the values of x and y are point (20, 75), point (20, 87), point (90, 75), and point (90, 58), in this order, wherein the wire diameter of the aforementioned tungsten wire is represented by x mum, and the elongation of the tungsten wire is 2% after electrically heating with an electrical current which is a ratio of y % to the fusion current (FC) at the wire diameter x mum, and wherein a semi-logarithmic system of coordinates is expressed by a horizontal axis using a logarithmic scale of the aforementioned wire diameter x and a vertical axis using a normal scale of ratio y to the fusion current. According to the above-described configuration, a tungsten wire having a great elongation even under conditions of high temperature can be provided, and the tungsten wire can exhibit an excellent durability when used as component material for constituting cathode heaters and so forth, and the tungsten wire can be manufactured efficiently.

The invention relates to the field of preparing of alloy materials, in particular to a pulse current assisting titanium-TiAl composite plate non-sheath rolling method. The pulse current assisting titanium-TiAl composite plate non-sheath rolling method aims at solving the problems that a plate prepared through an existing foil metallurgy method for titanium-TiAl composite plates is small in size, not uniform in thickness, large in component deviation and low in strength and plasticity, and the problems that a sheath hot rolling method is high in cost, complex in technology and high in rolling temperature, and the quality and performance of composite plates need to be further improved are solved. The pulse current assisting titanium-TiAl composite plate non-sheath rolling method includes thespecific steps that firstly, a titanium alloy plate is prepared; secondly, a TiAl alloy plate is prepared; thirdly, non-sheath assembling is conducted; fourthly, pulse current auxiliary hot rolling is conducted; and fifthly, separating and subsequent treatment are conducted, and a titanium-TiAl composite plate can be obtained. The composite plate obtained in the pulse current assisting titanium-TiAl composite plate non-sheath rolling method is good in surface quality, free of oxide layer disengagement, free of edge portion and end portion cracking, uniform and small in plate organization, good in bonding interface and good in mechanical performance.

A process and an apparatus for preparing steel stock before hot rolling. The steps of preheating the stock (5, 16, 22) in a first induction furnace (6) so that the preheated stock enters a subsequent descaling apparatus (7) with a surface temperature of T₁≧1000° C.; descaling the preheated stock by a plurality of water jets in a descaling apparatus (7); direct subsequent heating of the descaled stock in a second induction furnace (8), where the descaled stock enters the second induction furnace (8) at a temperature T₂ which is ≧T_curie of the stock and heating in the second induction furnace 8 is either in a largely inert or largely reducing protective gas atmosphere; passing the heated stock in a rolling mill (9), where the heated stock enters the rolling mill (9) at a temperature 1220° C.≧T₃ 1050° C.

A method and a device for producing a metal strip by continuous casting and rolling, in which a thin slab is initially cast into a casting machine, and is subsequently rolled in at least one rolling train using primary heat from the casting cycle. The cast thin slab is passed between the casting machine and the at least one rolling train and at least one holding oven as well as at least one induction oven. The holding oven and the induction oven are activated or deactivated according to a selected mode of operation, that is, a first mode of operation for the continuous production of the metal strip and a second mode of operation for the discontinuous production of the metal strip.

The invention discloses a strong-shear rolling forming method and a strong-shear rolling forming device for a metal plate. Power is provided by friction force between the plate and rollers during rolling deformation, and the plate is subjected to the strong-shear deformation of dies, and then enters a part between the rollers for plate rolling deformation. The device comprises a double-roller rolling mill, a movable die upper template, a movable die lower template, a stand, a fixed die lower template and a fixed die upper template, wherein the fixed die lower template is fixedly arranged on the stand; the movable die lower template is hinged to the fixed die lower template, and is arranged on the stand through an oil cylinder; the fixed die upper template and the movable die upper template are arranged on the fixed die lower template and the movable die lower template through bolts respectively; the double-roller rolling mill is arranged at an outlet of a metal plate passage. The method and the device are flexible in die equal channel angular adjustment and low in cost; the rolling deformation and the shear deformation of the metal plate such as a magnesium plate and an aluminum plate can be effectively combined, crystal grains of the plate can be refined, the texture evolution of the plate can be controlled, and the mechanical performance and the forming performance of the plate can be improved.

Rolling method for the production of flat products with low productivity, which comprises a continuous casting step at a speed comprised between 3.5 m/min and 6 m/min of a thin slab with a thickness comprised between 25 and 50 mm. It also comprises a roughing step to reduce the thickness in at least one roughing stand to a value comprised between 6 mm and 40 mm, and suitable for winding, a rapid heating step by means of induction in order to at least restore the temperature lost in the segment downstream of casting and in the roughing step, a winding/unwinding step in a winding/unwinding device with two mandrels. The method also comprises a rolling step in a rolling unit that consists of a single reversing stand of the Steckel type to roll the product unwound by the winding/unwinding device, which comprises at most five rolling passes, or four inversions, in order to obtain a final product with a thickness comprised between about 1.4 mm and 10 mm, preferably between about 1.4 mm and 8 mm, a cooling step and a step of winding the final product.

For controlling the flatness of the strip during the rolling of aluminium strip or foil, the system consists of a full width bank of cryogenic roll cooling devices acting on the roll(s) and a full width bank of roll heating devices also acting the roll(s). Both or either of the cooling and heating banks are divided into individually controllable zones. A process automation system controls the action of the cooling and heating banks via feedback from a strip shape meter and/or a predictive process model, in order, by thermal growth/contraction, to create the best roll profile for rolling flat strip.

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

The invention discloses a short-process producing and processing technology for cold rolling ultrahigh strength steel. The short-process producing and processing technology comprises the following steps: hot rolled strip steel, serving as an incoming material, is treated by procedures before rolling such as acid pickling and the like, cold rolling, heat treatment and deformation and phase transition comprehensive treatment, enters a loop after the heat treatment and the deformation and phase transition comprehensive treatment, is suitable for changes of the rolling velocity and the punch velocity by regulating the loop capacity and can enter a punching and quenching technology after being shorn with fixed length; and after the ultrahigh strength steel is finished, a finished or semi-finished punching part is obtained. Short-process producing and processing equipment for cold rolling the ultrahigh strength steel comprises a cold continuous rolling unit, a degreasing device inlet frame, a degreasing device, a looping tower, an annealing furnace front tension controlling device, an annealing furnace, an annealing furnace back tension controlling device, a collecting box and the like. With the adoption of the short-process producing and processing process and equipment, the energy consumption is reduced, the energy is saved, and the production cost is lowered; and by adding the deformation technology in the heat treatment process of the ultrahigh strength steel, the purpose of synchronous deformation and phase transition of the ultrahigh strength steel is realized, and the using performance of the strip steel is improved.

The invention belongs to the field of material preparation, and particularly relates to a method for preparing multi-scale precipitated nano heterogeneous magnesium alloy plates. The method comprisesthe following steps of rolling, wherein a plurality of magnesium alloy plates with two or more aging precipitation behaviors are alternately stacked and then rolled into bars; rolling, wherein the bars are rolled to prepare a multi-layer heterogeneous magnesium alloy thick plate blank; hot rolling, wherein the layer thickness is reduced through hot rolling, the interface bonding degree is improved, and the multi-layer heterogeneous magnesium alloy plates are prepared; and multi-scale precipitation, wherein multi-scale precipitation in the heterogeneous magnesium alloy plates is regulated and controlled through solid solution and aging treatment, and the multi-scale precipitation reinforced nano heterogeneous magnesium alloy plates are obtained. The heterogeneous magnesium alloy plates areprepared through a double-alloy or multi-alloy rolling and hot rolling method, and has great microstructure design directivity and flexibility. The prepared alloy has toughness and strength of a softphase and a hard phase, and the high-strength and high-toughness double-system or multi-system precipitation reinforced magnesium alloy with excellent comprehensive performance is obtained.

A production line for manufacturing metal strips made of copper or copper alloys by means of casting and rolling. In order to lower the investment cost and operating expenses therefore, the melt is cast into a copper strip in a vertical and/or horizontal continuous strip casting process, and the hot copper strip is cleaned by milling the top and bottom face thereof, is subjected to a cold rolling process, and is prepared for shipping, or is subjected to an inspection and then prepared for shipping after being annealed, pickled, washed, dried, and optionally temper rolled.

The invention discloses a preparation method of fine-grain TA15 titanium alloy foil. The preparation method specifically comprises the following steps of (1) heating a TA15 titanium alloy cast ingot at 1000-1100 DEG C, and then carrying out cogging forging to obtain a plate blank; (2) carrying out heat preservation at 900-960 DEG C, and then carrying out rolling; (3) carrying out heat treatment at 30-50 DEG C above a beta phase transformation point, and then carrying out water quenching cooling; (4) carrying out heating at 900-940 DEG C, and then carrying out rolling; (5) carrying out assembly welding on the obtained blank to obtain a cladding ply-rolling pack; (6) carrying out heating at 900-940 DEG C, and then carrying out rolling for the fourth time; (7) opening the ply-rolling pack, and then carrying out assembly welding on the blank to obtain a cladding ply-rolling pack; (8) carrying out heating at 920-940 DEG C, and then carrying out rolling in a direction perpendicular to the previous rolling direction; (9) carrying out annealing, creep correction, alkali pickling and sanding on the blank to obtain a plate with the thickness of 0.6 mm; (10) shearing the plate, and then carrying out cold rolling multiple times to obtain rolled foil with the thickness ranging from 0.1 mm to 0.2 mm; and (11) carrying out vacuum annealing heat treatment to obtain the finished foil with the thickness ranging from 0.1 mm to 0.2 mm.

The present invention provides a shape-correcting and rolling method for high-strength steel, whereby it is possible to effectively achieve shape correction of high-strength steel, and provides a shape-correcting and rolling method for high-strength steel, the method comprising: a hot-rolling skin-pass-mill direct-coupling forwarding step in which a hot-rolled coil is sent to a pay-off reel, or a step in which the coil is forwarded after having been passed through a cooling step; an unwinding step in which the coil is spooled out from the pay-off reel; a shape-correcting step in which a heat-pipe roll is used to correct the shape of the unwound strip; and a re-winding step in which the strip is re-wound into a coil.

In a method of making a seamless hot-finished steel pipe a billet heated to a shaping temperature is pierced by a first shaping to a thick-walled hollow ingot which subsequently undergoes a radial forging process using an internal tool inserted in the hollow ingot and at least two forging jaws of a forging machine. The forging jaws act on the outer surface area of the hollow ingot, wherein the hollow ingot is turned and axially advanced in a clocked manner in the idle stroke phase of the forging jaws.