Thermo-hydrogen processing technology for improving room temperature plasticity of TC21 titanium alloy

A technology of TC21 and processing technology, applied in the field of improving the room temperature plasticity of TC21 titanium alloy, can solve the problems of poor room temperature plasticity and no room temperature plasticity, and achieve the effects of increasing the limit deformation rate, improving room temperature plasticity and reducing flow stress.

Pending Publication Date: 2015-09-23
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similar to other high-strength titanium alloys, TC21 titanium alloy also has the problem of poor room temperature plasticity, and there is currently no research report on improving its room temperature plasticity

Method used

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  • Thermo-hydrogen processing technology for improving room temperature plasticity of TC21 titanium alloy
  • Thermo-hydrogen processing technology for improving room temperature plasticity of TC21 titanium alloy
  • Thermo-hydrogen processing technology for improving room temperature plasticity of TC21 titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The determination of embodiment 1 optimum hydrogen placement temperature

[0031] Put three TC21 samples into the furnace tube of the tube furnace respectively, and cover the surface with a layer of titanium shavings to prevent the TC21 sample from being oxidized, and evacuate until the vacuum degree in the furnace tube is lower than 1×10 -3 Pa, the temperature was raised to 550°C, 650°C and 750°C respectively, and then hydrogen gas was introduced into the furnace tube to stabilize the hydrogen pressure in the furnace tube at 1.5kPa, 6.0kPa and 16.0kPa The relationship between the amount of hydrogen absorbed by the sample is different, so in order to ensure that the amount of hydrogen absorbed by the sample is similar, the amount of hydrogen gas introduced at different temperatures is different), keep warm for 2 hours, pull the furnace tube out of the tube furnace, naturally cool to room temperature, take The TC21 sample in the furnace tube is completed. After testing,...

Embodiment 2

[0043] Example 2 Compression performance test at room temperature to determine optimum hydrogen content

[0044] Put 6 original TC21 samples into the furnace tube of the tube furnace respectively, and cover the surface with a layer of titanium chips to prevent the TC21 sample from being oxidized, and evacuate until the vacuum degree in the furnace tube is lower than 1×10 -3 Pa, raise the temperature to 750°C, then feed hydrogen into the furnace tube to stabilize the pressure in the furnace tube at 0.1kPa, 6.0kPa, 15kPa, 25kPa, 29kPa and 31kPa respectively, keep the temperature for 2h, pull the furnace tube out of the tube furnace, Naturally cool to room temperature, take out the TC21 sample in the furnace tube and complete. After testing, the hydrogen contents of the six samples were 0.2wt.%, 0.4wt.%, 0.6wt.%, 0.9wt.%, 1.0wt.% and 1.2wt.%.

[0045] In order to eliminate the influence of heat treatment on the plasticity of TC21 titanium alloy at room temperature, the original ...

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Abstract

The invention discloses a thermo-hydrogen processing technology for improving room temperature plasticity of TC21 titanium alloy. The thermo-hydrogen processing technology is characterized in that a TC21 sample is put into a furnace tube of a tubular furnace, the surface of the TC21 sample is covered by a layer of titanium scraps to prevent the TC21 sample from being oxidized, vacuum pumping is conducted, when the vacuum degree in the furnace tube is lower than 1*10-3 Pa, the furnace tube is heated, the temperature is increased to 750 DEG C, nitrogen is led into the furnace tube, the nitrogen pressure in the furnace tube is stabilized to 15-25 kPa, the temperature is preserved for 1-2 hours, the furnace tube is pulled out from the furnace and naturally cooled to the room temperature, and the TC21 sample in the furnace tube is taken out.

Description

technical field [0001] The invention relates to a method for improving the plasticity of TC21 titanium alloy at room temperature. Background technique [0002] In recent decades, a series of titanium-based materials have been developed. Titanium and titanium alloys have excellent characteristics such as low density, high specific strength, non-magnetic, good corrosion resistance and biocompatibility, and have been highly used in aviation, aerospace, weapons, automobiles, ships, chemicals, medical, sports and other industries. Attention and wide application. Tracing back to the development history of titanium alloys, the development of titanium alloys originated from the urgent demand for new high-strength and high-specific gravity materials in the aviation industry in the 1950s and 1960s. High-temperature titanium alloys used in aeroengines and structural titanium alloys used in fuselage frames were first used Developed, a batch of corrosion-resistant titanium alloys appea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
Inventor 袁宝国郑育彬龚龙清王玉洁吕萌
Owner HEFEI UNIV OF TECH
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