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Titanium alloy forging process parameter optimization method combined with finite element numerical simulation program

A technology of process parameter optimization and numerical simulation, applied in the direction of geometric CAD, etc., can solve the problems such as the inability to reflect the relationship well, and achieve the effect of shortening the process development cycle, reducing the process development cost and improving the quality of forgings

Active Publication Date: 2021-06-11
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing diagram is established based on a certain mathematical model, which cannot well reflect the relationship between the thermal processing process of TC4 titanium alloy and the evolution of the internal structure.
Therefore, this method is not suitable for accurate prediction of the internal structure of TC4 titanium alloy under specific forging process parameters.

Method used

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  • Titanium alloy forging process parameter optimization method combined with finite element numerical simulation program
  • Titanium alloy forging process parameter optimization method combined with finite element numerical simulation program
  • Titanium alloy forging process parameter optimization method combined with finite element numerical simulation program

Examples

Experimental program
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Effect test

Embodiment 1

[0042]1) The material is taken from the TC4 titanium alloy forging billet, and machined into a cylindrical shape of φ8mm×12mm, and the coolant is used on the way;

[0043] 2) Carry out heat treatment modulation to the sample, the heat treatment system in this embodiment 1 is 1020 ℃ for 0.5h and then air cooling to obtain thin slice structure (such as image 3 shown);

[0044] 3) Carry out a thermal simulation compression test on the sample, the temperature is 850°C, 900°C, 930°C, 950°C, 970°C, and the strain rate is 0.01s -1 , 0.1s -1 、1s -1 , the deformation amount is 70%, heat the sample to the set temperature for 5 minutes, compress according to the set strain rate and deformation amount, and cool with nitrogen after the completion, the cooling rate is about 30°C / s-40°C / s, and the flow rate is obtained. Variable stress curve data (such as Figure 4 shown), and corrected for friction and temperature rise;

[0045] 4) Use the finite element numerical simulation model to ...

Embodiment 2

[0059] The steps of Example 2 are the same as those of Example 1, but the initial structure has been changed. This is because the structure of the forging billet before the actual forging in the factory is not the same, and the processing technology must also be different. Using different initial forging billet structure types can be closer to the The actual forging situation of the factory.

[0060] 1) The material is taken from the TC4 titanium alloy forging billet, and machined into a cylindrical shape of φ8mm×12mm, and the coolant is used on the way;

[0061] 2) Carry out heat treatment modulation to the sample, the heat treatment system in this embodiment 2 is water cooling after 1020 ℃ of heat preservation 0.5h, obtains martensitic structure (such as Figure 10 shown);

[0062] 3) Carry out a thermal simulation compression test on the sample, the temperature is 850°C, 900°C, 930°C, 950°C, 970°C, and the strain rate is 0.01s -1 , 0.1 -1 ,1 -1 , the deformation amount ...

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Abstract

The invention discloses a titanium alloy forging process parameter optimization method combined with a finite element numerical simulation program, which establishes a finite element numerical simulation model, and comprises the following steps: 1) obtaining a forging sample rheological curve through an isothermal thermal compression experiment, and performing microscopic structure detection on the compressed forging sample to obtain a corresponding relation among the temperature, the strain rate and the microstructure; (2) carrying out numerical simulation on the isothermal thermal compression experiment by utilizing a finite element numerical simulation model to obtain a corresponding relation between equivalent strain and a microscopic structure of the sample; (3) establishing an atlas: establishing a corresponding relation among an initial microstructure, a hot working process parameter value and a final microstructure; (4) according to the final structure requirement of forging, determining the hot working technological parameter value of the forge piece through the atlas; and (5)outputting forging process parameters. The method is used for setting and optimizing the TC4 titanium alloy forging process and parameters thereof, the process development cost is reduced, the process development period is shortened, and the forging quality is improved.

Description

technical field [0001] The invention relates to the field of metal materials, and more specifically relates to a method for optimizing the parameters of a titanium alloy forging process combined with a finite element numerical simulation program, and is particularly suitable for the method for optimizing the parameters of a TC4 titanium alloy forging process. Background technique [0002] With the development of the aviation industry and the continuous release of the potential of the civil aviation market, the application range and consumption of titanium alloys with high specific strength and good corrosion resistance in this field are expanding. In view of the particularity of titanium alloy application fields, how to produce titanium alloy products with low cost, high stability and performance requirements has become an important challenge for the titanium industry. [0003] In the production process of titanium alloy products, the forging process is almost a necessary pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17
Inventor 丁晨许正芳范永革孟庆通洪凌翔
Owner 宝武特种冶金有限公司