Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of low-activation steel and tungsten full solid solution joint

A technology of low-activation steel and solid solution, which is applied in the direction of ion implantation plating, coating, metal material coating technology, etc., can solve the problems of large difference in expansion coefficient, elastic modulus, brittle structure, etc., and achieve the effect of firm metallurgical bonding

Active Publication Date: 2022-01-11
SOUTHWESTERN INST OF PHYSICS
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-activation steel and tungsten full-solid solution joint for the problems of large differences in expansion coefficient, elastic modulus, and brittle structure between the two when the tungsten alloy is connected to the metal low-activation steel. and its connection method

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
  • Preparation method of low-activation steel and tungsten full solid solution joint
  • Preparation method of low-activation steel and tungsten full solid solution joint
  • Preparation method of low-activation steel and tungsten full solid solution joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] 1) A thermocompression connection method for obtaining a low-activation steel and a tungsten alloy full-solid solution joint, including a base material to be welded and a transition layer material, the base material being a tungsten alloy and a low-activation steel,

[0028] 2) The screening of the intermediate layer needs to meet three conditions, the transition layer material and the main elements of the base metal to be welded have a relatively large solid solubility; considering that the divertor in the future fusion reactor environment will be in an environment of fusion neutrons, High neutron active elements such as niobium, nickel, molybdenum, aluminum and copper should be excluded, and elements with low neutron activation requirements should be selected; considering the large difference in expansion coefficient of the base material, for tungsten alloy: 4.5×10 -6 K -1 , low activation steel is 12~14×10 -6 K -1 , the thermal expansion coefficient of W at room te...

Embodiment example 2

[0039] 1) A thermocompression connection method for obtaining a full solid solution joint of low-activation steel and tungsten alloy, including the base material to be welded and the transition layer material, the base material is tungsten alloy and low-activation steel, and the screening conditions for the intermediate layer will not be repeated here. The welding structure is directly selected as tungsten alloy / vanadium foil strip / iron coating / low activation steel;

[0040] 2) Preparation of transition layer material

[0041] Grind and ultrasonically clean the transition layer material vanadium alloy foil strip, chromium target and base material low-activation steel to be magnetron sputtering, and put the chromium target into the magnetron sputtering device; adopt the method of magnetron sputtering On the surface of low-activation steel, iron coatings with a thickness of 5 μm, 10 μm and 15 μm are deposited, and the vacuum degree reaches 5×10 -3 Pa; the vanadium foil tape and...

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
purityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to a connection method, and particularly relates to a preparation method of a low-activation steel and tungsten full solid solution joint. The method comprises the following steps: 1, a transition layer material is determined, specifically, a transition layer material and a welding structure position are determined according to the properties of base metal and the transition layer material; 2, polishing and cleaning are conducted, specifically, the transition layer material and the base metal are polished and ultrasonically cleaned, and metal deposition is conducted on the surface of the base metal; 3, cleaning and assembling are conducted, specifically, a base metal tungsten alloy is polished, ultrasonically cleaned and air-dried, a vanadium foil strip, a low-activation steel sample obtained after magnetron sputtering and the tungsten alloy are assembled into a sample from top to bottom according to the sequence of the tungsten alloy, the vanadium foil strip, a chromium coating and the low-activation steel through a tool, and the sample is placed in a vacuum hot pressing furnace; and 4, vacuum hot pressed sintering is conducted; specifically, vacuum hot pressed sintering is conducted on the product in the step 3. The method has the remarkable effects that the thermal expansion coefficient difference between tungsten and the low-activation steel is solved; and intermetallic compounds are prevented from being generated between the tungsten and the low-activation steel.

Description

technical field [0001] The invention belongs to a connection method, in particular to a method for preparing a low-activation steel and tungsten full-solid solution joint. Background technique [0002] The plasma-facing components of future fusion reactors are usually composed of plasma-facing materials and heat sink materials or structural materials, which are applied to the divertor and the first wall of the device to withstand high-flux plasma and 14MeV neutron irradiation and huge heat load. In the conceptual design of the helium-cooled divertor, tungsten was selected as the first choice for the plasma-oriented material due to its low activity, high melting point, high thermal conductivity, low vapor pressure, low physical sputtering rate, and low tritium retention; and The low-activation steel is used as the structural material, and the plasma-facing components composed of the two can discharge the heat flow from the plasma and the helium ash and impurity particles pro...

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 Applications(China)
IPC IPC(8): B23P15/00C23C14/16C23C14/35
CPCB23P15/00C23C14/35C23C14/165Y02E30/10
Inventor 王建豹练友运封范陈哲刘莎莎刘翔
Owner SOUTHWESTERN INST OF PHYSICS