Method for eliminating residual stress of titanium part subjected to powerful spinning deformation

Abstract

A method for eliminating residual stress of a titanium part subjected to powerful spinning deformation comprises the following steps that 1, the titanium part subjected to spinning is placed in a heat treatment furnace, the temperature is increased to the target temperature of 530-560 DEG C at the heating speed of 10-52 DEG C/min, and the heat preservation time is 60-100 min; and 2, after heat preservation is conducted, cooling is conducted to 380-410 DEG C in a furnace cooling manner, and then discharging and air cooling are conducted to the room temperature. According to the process, the residual internal stress of the TA1 part after the powerful spinning deformation can be eliminated, so that the risk of deformation of a thin-walled cylinder part due to the release of the residual stress in the subsequent machining process is reduced, and the microstructure excellence and the use performance of the material are improved.

Description

technical field [0001] The invention belongs to the field of metal heat treatment, and in particular relates to a method for eliminating residual stress of titanium parts deformed by powerful spinning. Background technique [0002] Titanium and titanium alloys have excellent properties such as high specific strength, good corrosion resistance, and high temperature resistance. They have been widely used in many fields, especially in the manufacture of mechanical parts. Titanium and titanium alloys are very important raw materials. With the rapid development of high-tech industries such as aviation and aerospace, the demand for large seamless thin-walled cylindrical parts is increasing, and the requirements are becoming higher and higher. Power spinning technology is an advanced process method for producing rotary hollow parts. It has high material utilization rate, flexible process, simple tooling, and can be processed into large-scale rotary parts as a whole. During the for...

AI Technical Summary

Problems solved by technology

During the forming process of powerful spinning, the wall thickness of the workpiece is obviously thinned, and the deformation process is very complicated.

At the same time, due to the severe deformation, after the processing is completed, there will be deformation residual stress in the part that is difficult to measure quantitatively, which will adversely affect the subsequent performance

In order to reduce or eliminate the influence of internal stress generated during the deformation process, deformed parts usually need annealing heat treatment, and if the annealing process parameters are not selected properly, the stress release will be incomplete, so that the microstructure still retains the characteristics of the deformed structure or grain abnormalities Grow up to form local coarse-grained structures, etc., which eventually lead to a decline in the performance of the material

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