Process control method of titanium alloy milling-polishing-shot-peening strengthening residual stress field

Abstract

The invention discloses a titanium alloy milling-polishing-shot peening strengthening residual stress field process control method, which comprises the steps of establishing a milling residual stressfield exponential attenuation function model, a shot peening strengthening residual stress field cosine attenuation function control model and a milling-polishing process composite residual stress field control model; establishing a milling-polishing-shot peening strengthening process composite residual stress field control model, and obtaining a relation model between process weighting coefficients and corresponding process parameters; solving a milling residual stress field control factor, a shot penning strengthening residual stress field control factor, a polishing process influencing factor and each process weighing coefficient according to a test method, and obtaining a milling-polishing-shot peening strengthening process composite residual stress field control model. The method disclosed by the invention solves a problem of difficult prediction for the residual stress field in recombination process of the titanium alloy milling-polishing-shot peening strengthening process.

Description

【Technical field】 [0001] The invention belongs to the technical field of mechanical processing of metal materials, and in particular relates to a process control method for titanium alloy milling-polishing-shot-peening strengthening residual stress field. 【Background technique】 [0002] Titanium alloy materials have excellent properties such as light weight, high strength, high temperature resistance, and fatigue resistance. They are important metal materials for manufacturing key parts in aerospace, automotive, marine, and biomedical fields. TC17 is an α+β two-phase titanium alloy rich in β-stabilizing elements. It has a series of advantages such as high specific strength, good toughness and hardenability, good fracture toughness and creep resistance, and wide forging temperature range. It is widely used in the manufacture of aero-engine fans, compressor discs and forgings with large cross-sections. However, TC17 titanium alloy is a typical difficult-to-machine material. D...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a process control method of titanium alloy milling-polishing-shot-peening strengthening residual stress field to solve the problem of difficult prediction of residual stress field in the compound process of titanium alloy milling, polishing and shot-peening strengthening

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