Prediction method of low-magnification coarse-grain structure distribution in near-alpha titanium alloy

Abstract

The invention relates to a prediction method of near alpha titanium alloy low-power coarse grain structure distribution. The prediction method comprises the following steps of S1 determining the structure of a material under a selected process condition; S2 carrying out statistical analysis on the microscopic structure of the core of the thermal compression test piece under the corresponding process, and carrying out statistical analysis on the grain size; S3 establishing a quantitative prediction model of the original grain size; and S4 on the basis of microscopic structure critical conditionD beta>=D0 formed by the low-power coarse crystals, realizing the visual prediction of near alpha-titanium alloy low-power coarse crystal distribution through secondary development and numerical simulation analysis of finite element software. The prediction method for the macroscopic structure distribution of the near alpha-titanium alloy can effectively reveal the microscopic structure change ofthe near alpha-titanium alloy forge piece after forging heat treatment, and particularly realizes visual prediction of the original grain coarsening and the macroscopic structure distribution causedby the original grain coarsening. The forming process is optimized, the low-power coarse grain area is reduced, and the prediction result is accurate.

Description

Technical field [0001] The invention belongs to the technical field of titanium alloy forgings forging, and relates to a method for predicting the distribution of a low-magnification coarse-grained structure of a near alpha titanium alloy. Background technique [0002] Titanium alloys are widely used in the aviation field due to their good comprehensive properties, and are often made into aircraft load-bearing components through hot die forging. While the demand for titanium alloy die forgings in my country's aviation industry is increasing rapidly, the requirements for the macro and microstructure and mechanical properties of titanium alloy aviation forgings are becoming more and more stringent. [0003] The macrostructure of aerospace forgings is one of the important basis for forging quality evaluation and product rejection. It is very sensitive to the deformation process and thermal history of the forgings. Especially for large die forgings, due to the complex structure of the...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for predicting the distribution of low-magnification coarse grains of near-α titanium alloys. Uncontrollable coarse grains, and then a more reasonable deformation process can be formulated according to this method, so that the structure and performance of forgings are more uniform and stable

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