Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Heat treatment process for allowing TC21 alloy to obtain basket-weave microstructure after superplastic deformation in two-phase region

A basket structure, TC21 technology, applied in the field of heat treatment technology, can solve the problem of difficult to obtain the basket structure, etc., to achieve the effect of excellent damage tolerance

Inactive Publication Date: 2014-08-20
NANCHANG HANGKONG UNIVERSITY
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a heat treatment process for obtaining the basket structure after superplastic deformation in the two-phase region of TC21 alloy, so as to solve the problem that it is difficult to obtain the basket structure after superplastic deformation in the two-phase region of TC21

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
  • Heat treatment process for allowing TC21 alloy to obtain basket-weave microstructure after superplastic deformation in two-phase region
  • Heat treatment process for allowing TC21 alloy to obtain basket-weave microstructure after superplastic deformation in two-phase region
  • Heat treatment process for allowing TC21 alloy to obtain basket-weave microstructure after superplastic deformation in two-phase region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0031] In the present invention, the TC21 tensile sample first passes through 900°C, 3.3 × l 0 -4 / s for superplastic stretching, and take out the water cooling immediately after the tensile sample is broken.

[0032] Then, triple heat treatment is performed on the evenly deformed tensile sample after breaking. The triple heat treatment is composed of three times of heating, three times of heat preservation and three times of air cooling. The first heat treatment is selected as a solid solution in the β phase region, the purpose is to completely change the stretched structure of TC21, so that it becomes a β phase and a β transformation structure, so the temperature of the first heat treatment is taken in the quasi-β phase region...

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 heat treatment process for allowing a TC21 alloy to obtain a basket-weave microstructure after superplastic deformation in a two-phase region. The heat treatment process includes the steps: firstly carrying out superplastic tensile of a TC21 tensile specimen at the temperature of 900 DEG C and a set strain rate until tensile failure; after tensile failure of the tensile specimen, immediately carrying out water cooling; cutting out a uniform-deformation part of the tensile-failure specimen to be used as a heat treatment specimen; carrying out first heat treatment on the heat treatment specimen, heating a heat treatment furnace up to 10-20 DEG C above a beta-phase transition temperature, putting the heat treatment specimen into the heat treatment furnace, carrying out heat preservation for 1 hour, and followed by carrying out first air cooling; then, carrying out second heat treatment on the heat treatment specimen, heating the heat treatment furnace up to 20-30 DEG C below the beta-phase transition temperature, putting the heat treatment specimen into the heat treatment furnace, carrying out heat preservation for 1 hour, and followed by carrying out second air cooling; and then, carrying out third heat treatment on the heat treatment specimen, heating the heat treatment furnace up to 360-370 DEG C below the beta-phase transition temperature, putting the heat treatment specimen into the heat treatment furnace, carrying out heat preservation for 4 hours, followed by carrying out third air cooling, and thus obtaining the basket-weave microstructure.

Description

technical field [0001] The invention relates to a heat treatment process for obtaining a basket structure after superplastic deformation of the two-phase region of TC21 alloy. Background technique [0002] With the continuous development of aerospace technology, advanced aircraft put forward more stringent requirements for the use of aviation components, which must not only meet the requirements of large size, high performance, and high weight reduction of new aircraft, but also meet the requirements of long life and Due to low-cost design and application requirements, the concept of "damage tolerance design" has become the mainstream concept of modern aircraft design. The damage tolerance design is based on the theory of fracture mechanics, and it is a design method to ensure the safe use of components containing cracks during the service period through slow crack growth or damage safety. TC21 titanium alloy is a high-strength damage-tolerant titanium alloy, which has exce...

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): C22F1/18
Inventor 董洪波朱深亮
Owner NANCHANG HANGKONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com