57results about How to "Reduce the number of forging fires" patented technology

The invention relates to bar material forging machining method of titanium alloy, particularly to a forging machining method of large-sized bar materials of TC4 (Ti-6Al-4V) titanium alloy. The forging machining method is characterized by comprising the following steps of step 1, performing cogging forging, step 2, performing intermediate forging above a phase transformation point, step 3, performing intermediate forging below the phase transformation point, step 4 and step 5, performing finished product forging and obtaining the phi 200 to 300 mm and 2000 to 3000 mm length of large-sized bar materials of the TC4 titanium alloy finally. Compared with the prior art, a large-sized ingot casting and a large-tonnage forging device are not required and the industrialized production can be achieved through an ordinary industrial 3 ton ingot and a small-tonnage forging press and the equipment investment is small, only a 3 tons of electric arc furnace and a 3000 tons of forming oil press which is matched with the electric arc furnace need to be invested in the phi 600 of 3 ton ingot, the small-tonnage forging press such as a 1600 tons of forging press needs to be invested in the forging process, and accordingly the equipment investment is significantly reduced.

The invention belongs to the field of pressure processing of steel materials, particularly relates to a forging-and-rolling compounded forming method for comprehensively promoting internal and external quality of wide and thick plate blanks. Numerical simulation technique is adopted to study internal strain distribution of the plate blanks formed by pure rolling, pure forging and the forging-and-rolling compounded forming method, and the forging-and-rolling forming method is provided and includes steps of 1), firstly heating the plate blanks to be cast; 2), subjecting the plate blanks to forging and deforming in a large hydraulic press after heating the same; 3), returning the plate blanks to be forged in a heating furnace for heat preservation after forging and deforming; and 4), delivering the forged plate blanks in a heated manner to a rolling mill to be rolled after heat preservation or cooling the same slowly to room temperature prior to being heated and rolled again. The forging-and-rolling compounded forming method has the advantages that the forging-and-rolling compounded forming method is applicable to forming process of various molded wide and thick plate blanks (slab ingot), especially to blanks with central looseness; by the method, the defect of core density loose of the wide and thick plate blanks can be overcome, micro-segregation can be alleviated, and texture of the plate blanks can be refined and distributed well; and meanwhile, surface quality of the steel plates can be guaranteed, working allowance can be reduced, and the finished wide and thick plate blanks with 'internal solidness and external refinement' can be realized.

A cogging forging method for close beta Ti alloy Ti-7333 comprises the steps of placing a heated blank on a forging machine and forging with a normal two-rammering two-drawing mode; after the two-rammering two-drawing mode is finished, drawing the blank to eight directions by adopting a normal method, wherein the time for each rammering of the forging machine is 5s, and the total deformation quantity of the first heating number forging is greater than or equal to 40%; air-cooling the blank to the room temperature after the first heating number forging is finished; in the added heating numbers, finishing the forging of rest heating numbers by adopting the method the same as that in the secondary forging. As the technical route of the high-low-high-low forging temperature is adopted in the method, the obtained Ti-7333 alloy is uniform in texture, fine in crystal grain without obvious forging defects, higher in flaw detection level and excellent in mechanical properties, and provides well basis for the subsequent die forging and thermal treatment procedure, the forging heating numbers are reduced as the method adopts the technical route, and the energy and cost are effectively saved.

The invention discloses a method for preparing a large-sized TC6 titanium alloy bar, which comprises the following steps: 1. pulling a titanium alloy ingot into square and forging; 3. Slitting and blanking, and then carrying out the second drawing and rounding forging; 4. Performing solution heat treatment and aging heat treatment to obtain large-sized TC6 titanium alloy bars with a cross-sectional diameter of 100mm to 210mm and a length of 2000mm to 4000mm. In the present invention, the rough as-cast structure in the ingot is broken by one-time squaring and forging, and the number of times of forging is reduced. Two to three times of drawing and rounding forging are carried out under the fire, which effectively breaks the long structure and further refines the structure, solves the shortcomings of low processing efficiency and long process of conventional large-scale titanium alloy processing, and effectively reduces the processing of large-scale titanium alloys. Time forging fire times.

The invention provides a die forging and forming method of a large-scale disc type forging piece. According to the die forging and forming method provided by the invention, the forging load can be effectively reduced, the metal flow and the forging piece die filling are facilitated, the forging heating number can be effectively reduced, the production efficiency can be increased, and the production cost can be lowered. The die forging and forming method is characterized by firstly carrying out die-forging on the center part of a local forming disc type forging piece and then carrying out die-forging on the edge part of a forming disc type forging piece until the forming disc type forging piece is integrally formed.

The invention relates to a non-magnetic stabilizer forging process. The steps of the process are as follows: (Step S01): blooming forging on an oil press: the 5000-ton oil press is utilized to do preliminary blooming work, a big step is drawn out to be hot Phi710, and small steps at both ends are drawn out to be hot Phi540; (Step S02): strengthening forging on a precision forging machine: the 1400-ton precision forging machine is adopted for forging forming, pull or push forging is performed after a clamp A and a clamp B are adopted for clamping, so that the small steps are forged into a preform size, the small steps at both ends are forged into a target size after temperature decreases to be lower than 800 DEG C, and finish forging temperature is not lower than 600 DEG C; (Step S03): strengthening forging on the oil press: the unstrengthened parts of the surface of the forging are forged at high speed to be strengthened under low pressure, deformation is 5 percent to 10 percent, and finish forging temperature is not lower than 500 DEG C; (Step S04): physical and chemical testing. The non-magnetic stabilizer forging process provided by the invention can produce non-magnetic stabilizers with uniform mechanical properties in each part and good magnetic property by utilizing the oil press and the precision forging machine for joint forging.

The invention discloses equipment and a method for preparing nickel-based high-temperature alloy hollow steel ingots through electro-slag remelting and belongs to the technical field of metallurgy. The equipment and the method are characterized in that the equipment adopts a single power supply and double loops for power supply and adopts a T-shaped conductive crystallizer and an inner crystallizer; the preparing method comprises the steps as follows: consumable electrode groups are prepared, a slag system containing proper components is prepared, is roasted and melted and then is poured into a cavity formed by the T-shaped conductive crystallizer and the inner crystallizer, meanwhile, the power supply of a conductive loop II is turned on firstly, then the power supply of a conductive loop I is turned on, and the consumable electrode groups are inserted in the slag for smelting and ingot drawing and are changed timely when relatively few consumable electrode groups are left until smelting ends. With the method, the nickel-based high-temperature alloy hollow steel ingots with the uniform components and good inner and outer surface quality can be manufactured.