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

Diffusion welding method of tungsten alloy and tantalum alloy at low temperature

A diffusion welding and tungsten alloy technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of reducing material fracture toughness, low corrosion resistance, reducing material service life, etc., to achieve strong applicability, flat surface Good performance and low cost

Active Publication Date: 2012-09-05
WUHAN UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are defects in the direct welding joints of tungsten alloy and tantalum alloy, which lead to low corrosion resistance and reduce the service life of the material; after further increasing the welding temperature, the welding strength is improved, but the recrystallization and grain coarsening of W and Ta reduce the material Fracture toughness

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
  • Diffusion welding method of tungsten alloy and tantalum alloy at low temperature
  • Diffusion welding method of tungsten alloy and tantalum alloy at low temperature
  • Diffusion welding method of tungsten alloy and tantalum alloy at low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A nickel foil with a thickness of 38 μm is selected as the intermediate layer for welding 93W-4.9Ni-2.1Fe alloy and TA1 industrial pure tantalum disc. The diffusion welding process conditions are: welding temperature 930 ° C, holding time 10 min, welding pressure 30 MPa.

[0033] A method for low-temperature diffusion welding of tungsten alloys and tantalum alloys using a nickel intermediate layer, comprising the following steps:

[0034] (1) Surface cleaning of the workpiece:

[0035] The weldment is 93W-4.9Ni-2.1Fe alloy with a diameter of 23mm and industrial pure tantalum disc; the middle layer of 38μm nickel foil is 99.0% pure and 23mm in diameter. The surface was ultrasonically cleaned with acetone solution for 10 min. Use a surface grinder to process tungsten alloy sheets and tantalum alloy sheets into round sheets with a parallelism better than 0.05mm. Before welding, use 1000#, 1200# and No. 05, 06 metallographic sandpaper to polish the surface to be welded of ...

Embodiment 2

[0042] The 38μm nickel foil is selected as the intermediate layer connecting the 93W-4.9Ni-2.1Fe alloy and the TA2 industrial pure tantalum disc. The diffusion welding process conditions are: welding temperature 810 ℃, holding time 90min, welding pressure 5MPa.

[0043] A method for low-temperature diffusion welding of tungsten alloys and tantalum alloys using a nickel intermediate layer, comprising the following steps:

[0044] (1) Surface cleaning of the workpiece:

[0045] The weldment is a 93W-4.9Ni-2.1Fe alloy with a diameter of 50mm and an industrially pure tantalum disc. The 38μm nickel intermediate layer is 99.0% pure and 50mm in diameter. Before welding, use No. 05 and No. 06 metallographic sandpaper to polish the surface to be welded of the disc. , ultrasonic cleaning with acetone solution for 1 min. Use a surface grinder to process tungsten alloy sheets and tantalum alloy sheets into round sheets with a parallelism better than 0.05mm. Before welding, use 1000#, 120...

Embodiment 3

[0052] A 5 μm nickel foil was selected as the intermediate layer connecting the 93W-4.9Ni-2.1Fe alloy and the TA1 industrial pure tantalum wafer. The diffusion bonding process conditions were: welding temperature 930°C, holding time 10min, and welding pressure 5MPa.

[0053] A method for low-temperature diffusion welding of tungsten alloys and tantalum alloys using a nickel intermediate layer, comprising the following steps:

[0054] (1) Surface cleaning of the workpiece:

[0055] The weldment is a 93W-4.9Ni-2.1Fe alloy with a diameter of 50mm and an industrial pure tantalum disc. The nickel intermediate layer is 99.0% pure and 50mm in diameter. Ultrasonic cleaning with acetone solution for 1 min. Use a surface grinder to process tungsten alloy sheets and tantalum alloy sheets into round sheets with a parallelism better than 0.05mm. Before welding, use 1000#, 1200# and No. 05, 06 metallographic sandpaper to polish the surface to be welded of the round sheets, and use acetone ...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a diffusion welding method of a tungsten alloy and a tantalum alloy at a low temperature, comprising the steps of: (1) workpiece surface cleaning: machining the tungsten alloy and the tantalum alloy to a required size and eliminating oxide layers of the tungsten alloy and the tantalum alloy and an oxide layer of an intermediate layer-nickel foil face to be welded; (2) workpiece assembling: placing the intermediate layer-nickel foil between the tungsten alloy and tantalum alloy to construct a welded workpiece; and (3) vacuum diffusion welding: putting the welded workpiece into a vacuum diffusion welding furnace, heating, preserving the heat, when the heat preserving starts, applying an axial pressure to the welded workpiece, and when the heat preserving ends, unloading the pressure and cooling along with the furnace. The diffusion welding method of the tungsten alloy and the tantalum alloy at the low temperature can overcome the problem that high quality diffusion welding of the tungsten alloy and the tantalum alloy at the low temperature cannot be realized by utilizing the traditional welding technology and is particularly suitable for the reliable and precise diffusion welding between the tungsten alloy and the tantalum alloy at the low temperature; and the prepared tungsten tantalum welding object can be used for research fields such as dynamic high-pressure physics, nuclear fusion and the like.

Description

technical field [0001] The invention relates to a welding method of dissimilar metal tungsten alloy and tantalum alloy, which is especially suitable for the low-temperature diffusion welding method of tungsten alloy and tantalum alloy. Background technique [0002] High-density tungsten alloy has a series of excellent properties such as high density, high strength, good ductility, good machinability, small linear expansion coefficient, high thermal conductivity, good oxidation and corrosion resistance, and good weldability. These excellent properties make it widely used in cutting-edge technology fields, military and civilian industries, such as balance weight components, conventional components, radiation shielding materials, etc. Among them, high-density tungsten alloy has better rigidity and is easy to maintain its shape. It is an ideal shielding material for nuclear fuel storage and radiation protection. At the same time, W-Ni-Fe alloy has a series of excellent properti...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/14B23K20/24
Inventor 沈强罗国强张联盟王传彬李美娟魏琴琴张建
Owner WUHAN UNIV OF TECH
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