A kind of anti-deformation forging process of titanium alloy ring forging

Abstract

The invention discloses an anti-transformation forging process of a titanium alloy ring forged part. The anti-transformation forging process comprises the following steps of feeding; punching; pre-rolling forming; finish rolling forming; hot expanding, wherein after a ring forged part obtained after finish rolling forming is heated till the temperature ranges from 920 DEG C to 980 DEG C and heat preservation is carried out for 0.5 h to 2 h, a ring expansion machine is used for carrying out hot ring expanding on the ring forged part, and the ring expanding amount is set to range from 1% to 1.5%; solution heat treatment; warm expanding, wherein after the ring forged part obtained after solution heat treatment is heated till the temperature ranges from 550 DEG C to 600 DEG C and heat preservation is carried out for 0.5 h to 2 h, the ring expansion machine is used for carrying out warm ring expanding on the ring forged part, and the ring expanding amount is set to range from 1% to 3%; andaging heat treatment. In this manner, rolling parameters can be optimized in the finish rolling process, the ideal product roundness can be obtained by independently carrying out ring expanding, and the degree of deformation generated to a titanium alloy material in the solid solution process due to the memory character is reduced. The warm expanding process is adopted for correcting deformation generated in the solution heat treatment process due to the memory character, the residual stress of the ring forged part is homogenized, and the deformation risk in the subsequent machining process isreduced.

Description

Technical field [0001] The invention relates to the technical field of ring forgings processing, in particular to a deformation-proof forging process for titanium alloy ring forgings. Background technique [0002] Titanium alloy materials have the characteristics of low density and good creep resistance at high temperatures. Titanium alloy materials are increasingly used in the field of aeroengines due to their superior comprehensive properties. However, the material has certain memory characteristics, and it is prone to product deformation during heat treatment and machining, and the deformation can be as high as 1.5% when the degree of deformation is serious, resulting in subsequent dimensions that cannot meet the design requirements, product dimension consistency and accuracy, and low final yield . The above defects are particularly obvious in the processing of large thin-walled ring parts. Summary of the invention [0003] The main technical problem solved by the present inv...

AI Technical Summary

Problems solved by technology

However, this material has a certain memory characteristic, and it is prone to product deformation during heat treatment and machining, and the degree of deformation can be as high as 1.5%, resulting in subsequent dimensions not meeting the design requirements, poor product size consistency and accuracy, and low final yield