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.

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.