Method for preparing TC21 titanium alloy gradient structure with high strength and toughness

A TC21, gradient microstructure technology, applied in the field of alloy materials, can solve the problems of difficulty in preparing small samples, complex preparation process, and difficult operation, and achieve the effect of large-scale industrial promotion value, simple operation, and simple equipment.

Active Publication Date: 2020-06-02
XIAN UNIV OF TECH
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the equipment required by the above method is very expensive, and the preparation process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing TC21 titanium alloy gradient structure with high strength and toughness
  • Method for preparing TC21 titanium alloy gradient structure with high strength and toughness
  • Method for preparing TC21 titanium alloy gradient structure with high strength and toughness

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] (1) Select a TC21 titanium alloy plate sample with a length of about 80mm, and polish the surface of the plate titanium alloy sample with metallographic sandpaper; then use anhydrous ethanol to wet the absorbent cotton to wipe the sample, and dry it for later use, such as figure 1 Shown

[0040] (2) Connect the plate-shaped sample to the positive and negative copper plate electrodes of the pulse power supply and put it into the glove box;

[0041] (3) Vacuum the glove box with a vacuum of 4KPa, then fill the glove box with an argon atmosphere and keep the pressure at 80KPa to prevent the sample from being oxidized;

[0042] (4) Turn on the pulse power, turn on the pulse power switch, adjust the pulse voltage to 67V, pulse current to 78A, and pulse frequency to 550Hz. The heating time is 1 minute, and the real-time temperature is measured with an infrared thermometer, kept at 1000°C for 5 minutes, and then air-cooled to room temperature;

[0043] (5) After roug...

Example Embodiment

[0045] Example 2

[0046] (1) Select a TC21 titanium alloy rod-shaped sample with a diameter of 11mm and a length of about 80mm, which is first processed into a rod shape by a lathe, and then the surface of the sample is polished with metallographic sandpaper; then the sample is moistened with absolute ethanol to wipe the sample. And dry for later use, such as Figure 4 Shown

[0047] (2) Connect the sample to be heat-treated with the positive and negative copper plate electrodes of the pulse power supply and put it into the glove box;

[0048] (3) Vacuum the glove box with a vacuum of 4KPa, then pass an argon atmosphere into the glove box and keep the pressure at 80KPa to protect the sample to be heat-treated and prevent oxidation;

[0049] (4) Turn on the power and turn on the pulse power switch. Adjust the pulse voltage to 75V, pulse current to 80A, and pulse frequency to 600Hz. The heating time is 1.5 minutes, and the real-time temperature is measured with an infrared thermomete...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for preparing a TC21 titanium alloy gradient structure with high strength and toughness. The method for preparing the TC21 titanium alloy gradient structure with high strength and toughness comprises the steps of applying pulse current on a TC21 titanium alloy bar or a panel, and utilizing resistance for locally heating; through controlling the parameters such as pulse voltage, the pulse current and pulse frequency, producing a temperature gradient in a TC21 titanium alloy bar-shaped sample or plate-shaped sample; and through controlling the width of the temperature gradient and the heat preservation time, finally obtaining the gradient structure at room temperature. According to the method for preparing the TC21 titanium alloy gradient structure with high strength and toughness provided by the invention, without the need for changing the alloy compositions, an integrated structure part containing an original material structure, a transition area gradient structure and a lamellar structure can be produced, so that the performance advantages of the original material are reserved, and meanwhile, a combination property of the material is improved. The method is simple to operate, equipment is simple and easy, the method is environmental-friendly and economical, the production efficiency is improved, the energy consumption is reduced, and the methodhas a larger industrial promotion value.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a method for preparing a gradient structure of a high-strength and tough TC21 titanium alloy. Background technique [0002] High-strength and tough titanium alloys have been receiving extensive attention at home and abroad due to their high strength, excellent corrosion resistance, high fatigue damage resistance, and lower density compared with steel, nickel-based alloys, and cobalt alloys. Especially in the past ten years, with the continuous development of smelting, thermal processing technology and equipment, high-strength and tough titanium alloys have been successfully used in the aerospace field, such as important parts such as aircraft landing gear, wing spars and engines. High-strength and tough titanium alloy structural parts are inevitably subjected to complex and periodic stress during service, which leads to deformation damage of this type of alloy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22F1/18C22F1/02
CPCC22F1/02C22F1/183
Inventor 谭长生张国君任帅
Owner XIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap