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Preparation method for high-strength pure titanium

A high-strength, pure titanium technology, used in metal rolling, manufacturing tools, roll speed control, etc.

Inactive Publication Date: 2016-07-20
佛山市领卓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As engineering materials, people usually expect high-strength materials. However, when obtaining high-strength materials, the plasticity of the material will generally be lost; while increasing the plasticity, the strength of the material will be lost.

Method used

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  • Preparation method for high-strength pure titanium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 3. Start the multi-functional rolling mill system, set the speed ratio of the upper and lower rolls, the speed ratio is 1.1; set the deformation of each rolling to 2%; set the speed of the low-speed roll to 0.5 m / s;

[0021] 3. Start the main drive motor and start rolling;

[0022] 4. After one rolling, repeat (2) (3) process 20 times;

[0023] 5. Perform recrystallization annealing heat treatment at 470 degrees Celsius for 3 minutes.

[0024] The metallographic microscopic analysis results show that the average grain size of the micro-crystals is 4.3 microns, and the average grain size of the nano-crystals is 120 nanometers.

[0025] Example 2

Embodiment 2

[0027] 4. Start the multi-functional rolling mill system, set the speed ratio of the upper and lower rolls, the speed ratio is 1.5; set the deformation of each rolling to 5%; set the speed of the low-speed roll to 0.8 m / s;

[0028] 3. Start the main drive motor and start rolling;

[0029] 4. After one rolling, repeat (2) (3) process more than 25 times;

[0030] 5. Carry out recrystallization annealing heat treatment at 490 degrees Celsius for 8 minutes.

[0031] The results of metallographic microscopic analysis show that the average grain size of the micro-crystals is 3.6 microns, and the average grain size of the nano-crystals is 89 nanometers.

[0032] Example 3

Embodiment 3

[0034] 5. Start the multi-functional rolling mill system, set the speed ratio of the upper and lower rolls, the speed ratio is 1.2; set the deformation of each rolling to 3%; set the speed of the low-speed roll to 2 m / s;

[0035] 3. Start the main drive motor and start rolling;

[0036] 4. After one rolling, repeat (2) (3) process 28 times;

[0037] 5. Perform recrystallization annealing heat treatment at 420 degrees Celsius for 15 minutes.

[0038] The results of metallographic microscopic analysis showed that the average grain size of the micro-crystals was 4.6 microns, and the average grain size of the nano-crystals was 149 nanometers.

[0039]

Example 1 Example 2 Example 3 Comparative example (pure titanium) Tensile strength (MPa) 850 820 810 350-450 Elongation (%) 12 11 12 20～30

[0040] The comparative example shows the properties of conventionally produced pure titanium, with a microcrystalline structure. It can be seen that ...

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Abstract

The invention adopts a method of micromachining and room-temperature asymmetrical rolling and provides high-strength pure titanium and a preparation method of the high-strength pure titanium. The microscopic structure of the obtained product is characterized in that the crystal grains of microscopic structures of the high-strength pure titanium are composed of crystal grains with two different grain size ranges, and that is, the common micro crystal grains and the nano crystal grains; and the grain size range of the nano crystal grains is 10-200 nanometers, and the grain size range of the micro crystal grains is 0.5-5 micrometers. Compared with the strength of a common titanium plate, the strength of the titanium plate provided by the invention is greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a pure titanium material, in particular to a high-strength pure titanium and a preparation method thereof. Background technique [0002] Titanium alloy is a metal material with excellent performance. Its specific strength is the highest among all metals. It is widely used in aerospace and nuclear reactors. As engineering materials, people usually expect high-strength materials. However, when obtaining high-strength materials, the plasticity of the material will generally be lost; while improving the plasticity, the strength of the material will be lost. The two are a pair of contradictions, and generally cannot have both. The invention provides a method for preparing high-strength pure titanium. The pure titanium not only has high strength but also has better plasticity. [0003] Chinese patent CN104846363A proposes a preparation method of a nanostructured pure titanium plate, a preparation method of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B3/00B21B37/46C22F1/18
CPCB21B1/222B21B3/00B21B37/46B21B2275/04C22F1/183
Inventor 何枇林其他发明人请求不公开姓名
Owner 佛山市领卓科技有限公司
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