Rolling forming method of gh4169 superalloy ring with complex special-shaped cross-section

Abstract

The invention discloses a method for rolling and forming a GH4169 high-temperature alloy complicated irregular cross section annular part and aims at providing complicated irregular cross section annular parts which are complete in appearance, high in dimensional accuracy and excellent in texture and performance and are distributed along the part appearances. The technical scheme is that the method comprises the steps of heating a GH4169 high-temperature alloy rod blanked according to specification and performing upsetting, punching and twice small-deformation annular rolling to form a rectangular pre-rolling blank; heating the rectangular pre-rolling blank and using a pre-rolling inner shape module and a pre-rolling outer shape module to roll the rectangular pre-rolling blank in a pre-rolling irregular hole to form an irregular pre-rolling blank with a structural shape adverse to a structural shape of a final rolling irregular cross section annular part; and heating the irregular pre-rolling blank and using a final rolling inner shape module and a final rolling outer shape module to roll the irregular pre-rolling blank in a final rolling irregular hole to form an irregular cross section annular part, wherein metal inside the irregular pre-rolling blank in the final rolling irregular hole flows from most to least according to preset volume flows when widened along the radial direction in rolling. The annular part is mainly used as a rotary body part for cylindrical casings and the like in the fields of aerospace and the like.

Description

technical field [0001] The invention relates to a rolling forming method of a ring piece, in particular to a rolling forming method of a GH4169 high-temperature alloy complex special-shaped cross-section ring piece. Background technique [0002] With the rapid development of industries such as aviation, aerospace, ships, nuclear energy, gas turbines, and wind power generation, higher requirements are placed on the forming dimensional accuracy, structure and performance of ring parts, and the rolling technology of ring parts is also moving towards With the development in the direction of near-net shape, the cross-sectional shape of rolled-formed ring parts is becoming more and more complex, and the difficulty of roll-forming is becoming more and more difficult. How to obtain ring parts distributed along the shape of parts is the premise of precision roll-forming. [0003] The Chinese invention patent specification CN101279346A published on October 8, 2008 discloses a rolling ...

AI Technical Summary

Problems solved by technology

Since this method adopts the rectangular pre-rolled billet to directly roll into special-shaped ring parts, it can only roll and form simple-shaped special-shaped cross-section ring parts under normal circumstances; if this method is used to roll complex-shaped special-shaped cross-section ring parts When the groove surface also has a convex table surface with a complex cross-section GH4169 superalloy ring, due to the complex metal flow of the rectangular pre-rolled billet in the rolling pass during the rolling process, the interaction between the rectangular pre-rolled billet and the rolling pass The interface conditions are complex, and the rolling process has obvious nonlinear, time-varying, and unsteady characteristics, resulting in the rolling and forming of special-shaped cross-section rings that are prone to defects such as insufficient cross-section contours, folds on the outer surface, and fish scales on the end surface. It affects the dimensional accuracy and structural performance of the final rolled ring parts, and in severe cases, it can also lead to the scrapping of the ring parts, which is not conducive to the realization of precision rolling forming of special-shaped cross-section ring parts

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