Strain-induced semi-solid multi-point die pressing forming process for aerospace titanium alloy plate

Abstract

A strain-induced semi-solid multi-point die pressing forming process for an aerospace titanium alloy plate comprises the steps that firstly, an original titanium alloy plate material is subjected to cold forging machining, and a strain energy gathered titanium alloy plate is obtained; then the strain energy gathered titanium alloy plate is put into an induction heating furnace to be heated and subjected to heat preservation treatment, and then a semi-solid titanium alloy plate is prepared through a strain-induced melt activation method; then the semi-solid titanium alloy plate is placed in a multi-point die, the shape of the forming face of a basic body array of the multi-point die is adjusted, an upper die body of the multi-point die is pushed through a pressure machine, and semi-solid multi-point die pressing hot forming is conducted on the semi-solid titanium alloy plate to obtain a semi-solid formed titanium alloy plate; and finally, the semi-solid formed titanium alloy plate is subjected to plate isothermal heat treatment, then finish machining is conducted, and a final titanium alloy part is obtained. According to the strain-induced semi-solid multi-point die pressing formingprocess for the aerospace titanium alloy plate, the machining efficiency and the forming quality are improved, and the work hours are shortened; and the forming range is wide, and flexible manufacturing can be achieved.

Description

technical field [0001] The invention belongs to the technical field of thermoforming of titanium alloy parts, and in particular relates to a strain-induced semi-solid multi-point molding process for aerospace titanium alloy plates. Background technique [0002] With the development of the manufacturing industry, the demand for titanium alloy plates with good mechanical properties is increasing. Titanium and titanium alloys have excellent comprehensive properties such as low density, high specific strength, corrosion resistance, high temperature resistance, non-magnetic, and good welding performance. It is widely used in aircraft landing gear components, frames, beams, fuselage skins, heat shields, compressor discs, blades, drums, high-pressure compressor rotors, and compressor casings. Aerospace vehicles work under extreme conditions such as ultra-high temperature, ultra-low temperature, high vacuum, high stress, and strong corrosion. In addition to requiring superb structur...

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Problems solved by technology

Among them, the hot stamping process after heating in the mold is prone to various defects such as: the internal structure of the material cannot form a spheroidized structure, springback deformation is prone to occur, and the effect of heat treatment is not good; , the production efficiency is low, and high-efficiency production cannot be completed; in aerospace thin-walled structural parts, different parts have different profiles, and a separate mold is required for each profile, which leads to a single shape of the parts produced by a single press

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