Disc rolling forming system and method

Abstract

The invention discloses a disc rolling forming system and method. The disc rolling forming method comprises the steps that the center of a disc is fixed through two pressing heads; the disc is drivento rotate; a spoke part and a rim part of the disc are heated through an induction coil; cooling gas is blown to the position of a disc hub; the disc is rolled and formed through a rolling head; the power of the induction coil is reduced, so that the disc is air-cooled to the room temperature after being slowly cooled to the preset temperature; and solid solution heat treatment is carried out on the disc. The spoke part and the rim part of the disc can be heated, and meanwhile the cooling gas is blown to the hub part, so that the temperature of the center position of the disc is lower than thetemperature of other positions of the disc, and the temperature difference in the radial direction is formed. Therefore, the disc is enabled to form a microstructure with gradient distribution and gradual transition after being rolled and formed, and gradient distribution of the radial mechanical property of the high-performance turbine disc is achieved.

Description

technical field [0001] The invention relates to the field of metal parts processing, in particular to a disc rolling forming system and method. Background technique [0002] Heat-resistant alloys such as titanium alloys and nickel-based superalloys are widely used in the manufacture of aeroengine turbine disks and compressor disks. They are characterized by high heat resistance and gas corrosion resistance, but at the same time have poor processability due to low ductility and high deformation resistance, so they are also known as high-strength metal materials that are difficult to form. The heat-resistant alloy turbine disk has high requirements on the dimensional accuracy and the structure formed during the deformation and subsequent heat treatment. At present, it is mainly through the method similar to the description in the US patent US3519503 under isothermal or near-isothermal conditions. The alloy disc blank is formed by die forging as a whole. The disadvantage of t...

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Problems solved by technology

The second limitation is that the disc rotates passively with the rotation of the rolling head during the rolling process, resulting in a certain degree of slippage, and it is difficult to accurately control the rolling speed and rolling deformation rate of the rolling head

The third limitation is that the upper and lower induction heating coils are connected in series, which brings certain difficulties to the loading and unloading of the plate, especially when the workpiece is large

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