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

Ultrafine grained Ta material and preparation method thereof

An ultra-fine grain and tantalum material technology, applied in the field of ultra-fine grain Ta material and its preparation, can solve the problems of unsuitable for industrial production of ultra-fine grain high-purity tantalum strip, affecting the performance of Ta material, introducing impurities, etc. Slip suppression, large deformation, and prevention of deformation and cracking

Active Publication Date: 2018-12-28
CENT SOUTH UNIV +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above technologies can obtain ultra-fine grains of metal materials through the theory of deep plastic deformation. However, the equal-diameter angular extrusion, high-pressure rotation, hourglass extrusion method and wrinkle straightening method are generally only suitable for the processing of small-sized materials. And the process is very complicated, not suitable for industrial production of large-scale ultra-fine grain high-purity tantalum strips
Although the stack rolling method is suitable for ultra-fine grain processing of large-scale metal materials, tantalum, as a metal that easily reacts with O, H, and C, is easy to introduce impurities during the stack rolling process and seriously affects Ta. Material properties

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
  • Ultrafine grained Ta material and preparation method thereof
  • Ultrafine grained Ta material and preparation method thereof
  • Ultrafine grained Ta material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The tantalum ingot (purity 99.996%) was vacuumed at 10 -4Under the condition of Pa, carry out electron beam smelting (melting temperature is 1310°C). After ingot casting, the ingot is covered with high-purity iron in an argon chamber; three-dimensional hot forging is carried out to open the billet, the total deformation of the billet is 75%, and the billet temperature 1200°C. Remove the high-purity iron sheath on the surface of the tantalum ingot after billeting, and cool the forged billet under liquid nitrogen. After cooling completely, carry out ultra-low temperature rolling (the temperature of low-temperature cold rolling is -80~-100°C), Pass deformation 50%. The ultra-low temperature cold-rolled 50% tantalum plate is heated to 1100 ° C, and the direction perpendicular to the ultra-low temperature cold rolling rolling direction is hot-rolled here (the temperature of the hot rolling is 1100-1120 ° C), and the rolling deformation is 50%. Repeat step A, step B to 7 ti...

Embodiment 2

[0041] The tantalum ingot (purity 99.997%) was vacuumed at 10 -4 Under the condition of Pa, carry out electron beam smelting (melting temperature is 1305 ℃), after ingot casting, the ingot is sheathed with high-purity iron in an argon chamber; three-dimensional hot forging is carried out to open the billet, the total deformation of the billet is 70%, and the billet temperature 1100°C. Remove the high-purity iron sheath on the surface of the billeted tantalum ingot, cool the forged billet under liquid nitrogen, and then carry out ultra-low temperature rolling (the temperature of low-temperature cold rolling is -100~-136°C), Pass deformation 50%. The ultra-low temperature cold-rolled 50% tantalum plate is heated to 1100 ° C, and the direction perpendicular to the ultra-low temperature cold rolling rolling direction is hot-rolled here (the temperature of the hot rolling is 1100-1120 ° C), and the rolling deformation is 50%. Repeat steps A and B6 times in turn to obtain the micr...

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

PropertyMeasurementUnit
Average grain sizeaaaaaaaaaa
Ultimate strengthaaaaaaaaaa
Average grain sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to an ultrafine grained Ta material and a preparation method thereof. Grain size of the ultrafine grained Ta material is smaller than or equal to 3 mu m; ultimate strength of thematerial is higher than or equal to 410 MPa, and yield strength is higher than or equal to 300 MPa. The preparation method of the material comprises the following steps: electron beam melting is performed on a Ta source, after ingot casting, an ingot is sheathed in a protective atmosphere; 3D hot-forging cogging is performed, total deformation of cogging is 65%-75%, and cogging temperature is 1150-1250 DEG C; after cogging, a sheath is removed, and low-temperature and high-temperature cross alternate rolling is performed; the ultrafine grained Ta material is obtained. The process is simple, and the prepared Ta ribbon has uniform and quite fine grains and is endowed with favorable strength, plasticity and toughness. The designed and prepared ultrafine grained Ta ribbon is applied to the high-technology fields of electronics, metallurgy, steel, chemical industry, hard alloys, atomic energy, superconducting technology, automotive electronics, aerospace, medical health and scientific research.

Description

technical field [0001] The invention relates to an ultrafine-crystalline Ta material and a preparation method thereof, belonging to the technical field of design and preparation of special materials. Background technique [0002] The density of tantalum is 16.68g / cm 3 , with a melting point of 2980°C. It has a series of excellent properties such as high melting point, low vapor pressure, good cold working performance, high chemical stability, strong resistance to liquid metal corrosion, and large dielectric constant of the surface oxide film. It is used in electronics, metallurgy, steel, and chemical industry. , Carbide, atomic energy, superconducting technology, automotive electronics, aerospace, medical and health and scientific research and other high-tech fields have important applications. [0003] With the continuous development of the new generation of information technology and industrial technology, in order to meet the needs of deep processing, the grain size and ...

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): C22F1/18C22C1/02C22C27/02
CPCC22C1/02C22C27/02C22F1/18
Inventor 李周蒋任翔肖柱彭智龚深张立强邱文婷
Owner CENT SOUTH UNIV
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