Method for manufacturing large-size variable-cross-section blisk forged piece of TC17 titanium alloy

Abstract

The invention discloses a manufacturing large-size variable-cross-section blisk forged piece of a TC17 titanium alloy, belongs to the field of forging, and aims to improve the overall deformation and distribution uniformity of the large-size variable-cross-section blisk forged piece. The method comprises the steps: S1, according to appearance and size of a TC17 large-size variable-cross-section blisk part, designing an optimal theoretical forging blank and an optimal theoretical rough blank through digital simulation; S2, preparing a finish forging die and a pre-forging die; S3, machining the bar into a bar blank; S4, transferring the bar blank to the pre-forging die to be pre-forged, to manufacture a pre-forged blank; and S5, transferring the pre-forged blank to a finish forging die to be subjected to finish forging to manufacture a forged piece blank. The pre-forging die and the finish-forging die are designed through digital simulation, and the bar blank is subjected to die forging to form the pre-forged piece, so that the deformation uniformity of the process from the bar to the pre-forged piece is improved; the pre-forge piece obtained through die forging is subjected to die forging through the finish forging die to form the forge piece, so that the deformation amount and the uniformity are improved, and the effective deformation range is enlarged. The raw material utilization rate is improved.

Description

technical field [0001] The invention belongs to the field of forging, in particular to a method for manufacturing a TC17 titanium alloy large-size variable-section integral blisk forging. Background technique [0002] With the continuous improvement of the bypass ratio, thrust-to-weight ratio and service life requirements of high-performance aeroengines, the TC17 titanium alloy rotor blades and discs for the engines are integrated, eliminating the need for tenons, tenons and locking devices in traditional connections. Reducing the weight and number of structures, avoiding the airflow loss of the tenons, and improving the aerodynamic efficiency can greatly simplify the engine structure. Based on this advantage, the TC17 titanium alloy large-size variable-section integral blisk came into being. This type of blisk needs the help of large-scale forging At present, large-scale die forging presses such as 800MN and 200MN have been put into use in China, which meet the equipment re...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of small deformation and uneven deformation distribution of the existing large-size variable-section integral blisk forgings, to provide a large-size variable-section integral blisk forging production method, and to improve the production efficiency of large-scale variable-section integral blisk forgings. The overall deformation and distribution uniformity

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