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

Hot isostatic pressure diffusion bonding method for vanadium alloy and steel

A hot isostatic pressure diffusion and connection method technology, applied in the field of nuclear fusion, can solve the problems of cracking of the connection interface, bending and deformation of materials, affecting the connection quality, etc., and achieve the effect of uniform transition, high bonding strength, and good connection quality.

Pending Publication Date: 2022-03-18
SOUTHWESTERN INST OF PHYSICS
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some studies have used the hot isostatic pressing method to realize the connection of vanadium alloy (V4Cr4Ti) and hydrogen embrittlement-resistant austenitic stainless steel HR2, but the shear strength is only 39MPa, which cannot meet the design and manufacturing requirements of fusion reactor cladding components
[0004] The hot isostatic diffusion bonding of vanadium alloy and RAFM steel has not been reported so far. The main difficulty of the diffusion bonding is the interface residual stress caused by the difference in thermal expansion coefficient between the two (vanadium alloy: 8~10×10 -6 K -1 ;Steel: 10~14×10 -6 K -1 ), excessive residual stress may lead to problems such as cracking at the connection interface and material bending deformation, which will affect the quality of the connection

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
  • Hot isostatic pressure diffusion bonding method for vanadium alloy and steel
  • Hot isostatic pressure diffusion bonding method for vanadium alloy and steel
  • Hot isostatic pressure diffusion bonding method for vanadium alloy and steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of vanadium alloy and the hot isostatic pressing diffusion bonding method of steel provided by the invention, refer to figure 1 The material of the exhaust pipe 1 is pure iron / stainless steel, the material of the cover plate 2 is pure iron / stainless steel, the material of the spacer 3 is stainless steel, the material of the anti-adhesive sheet 4 is molybdenum foil, and the material of the workpiece 5 is vanadium alloy (V4Cr4Ti alloy), the material of the workpiece 6 is steel (RAFM steel), and the material of the outer casing 7 is pure iron / stainless steel. Specifically include the following steps:

[0042] Step 1. Machining: machining the vanadium alloy workpiece 5 and the steel workpiece 6 to Φ30×3 mm and Φ30×20 mm respectively, and finishing the surface to ensure that the surface roughness Ra≤0.8 μm.

[0043]Step 2, production of sheathing: processing the cover plate 2 and the outer sheathing pipe 7, with a thickness of 1-2mm, without visual and penetrant insp...

Embodiment 2

[0054] A kind of vanadium alloy and the hot isostatic pressing diffusion bonding method of steel provided by the invention, refer to figure 1 , including the following steps:

[0055] Step 1. Machining: machining the vanadium alloy workpiece 5 and the steel workpiece 6 to Φ30×3 mm and Φ30×20 mm respectively, and finishing the surface to ensure that the surface roughness Ra≤0.8 μm.

[0056] Step 2, production of sheathing: processing the cover plate 2 and the outer sheathing pipe 7, with a thickness of 1-2mm, without visual and penetrant inspection defects, ensuring a smooth surface, with a roughness Ra≤1.6μm.

[0057] Step 3. Cleaning: After degreasing the steel workpiece 6, the anti-adhesive sheet 4, the exhaust pipe 1, the cover plate 2 and the outsourcing casing 7, put them in an ethanol cleaning solution for ultrasonic cleaning for 15 minutes. Put the material after ultrasonic cleaning into the derusting solution to remove the surface oxide layer; use about 10% nitric aci...

Embodiment 3

[0068] A kind of vanadium alloy and the hot isostatic pressing diffusion bonding method of steel provided by the invention, refer to figure 1 , including the following steps:

[0069] Step 1. Machining: machining the vanadium alloy workpiece 5 and the steel workpiece 6 to Φ30×3 mm and Φ30×20 mm respectively, and finishing the surface to ensure that the surface roughness Ra≤0.8 μm.

[0070] Step 2, production of sheathing: processing the cover plate 2 and the outer sheathing pipe 7, with a thickness of 1-2mm, without visual and penetrant inspection defects, ensuring a smooth surface, with a roughness Ra≤1.6μm.

[0071] Step 3. Cleaning: After degreasing the steel workpiece 6, the anti-adhesive sheet 4, the exhaust pipe 1, the cover plate 2 and the outsourcing casing 7, put them in an ethanol cleaning solution for ultrasonic cleaning for 15 minutes. Put the material after ultrasonic cleaning into the derusting solution to remove the surface oxide layer; use about 10% nitric aci...

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
Roughnessaaaaaaaaaa
Roughnessaaaaaaaaaa
Compressive shear strengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of nuclear fusion, and particularly relates to a hot isostatic pressure diffusion bonding method for vanadium alloy and steel. The method comprises the following steps of machining, sheath manufacturing, cleaning, baking, assembling, packaging, leakage detecting, baking and exhausting, clamping and sealing and hot isostatic pressing. According to the method, uniform transition of elements on a connection interface can be achieved, no intermediate phase is generated, the connecting piece has high bonding strength, the method is suitable for manufacturing fusion reactor cladding parts with vanadium alloy as a main body structure material, and the performance requirement of the material can be met.

Description

technical field [0001] The invention belongs to the field of nuclear fusion technology, and in particular relates to a method for hot isostatic pressure diffusion connection of vanadium alloy and steel. Background technique [0002] Nuclear fusion energy is the main energy source for future human beings. Low-activation ferrite / martensitic (RAFM) steel and vanadium alloys represented by V-4Cr-4Ti are the first and second generation structural materials for fusion reactors. The former has a good industrial technology foundation and rich performance data , the latter has better resistance to neutron irradiation, high-temperature mechanical properties and low-temperature toughness, representing the development direction of advanced cladding for fusion reactors. For different parts of the cladding components of the fusion reactor, two structural materials can be used respectively to meet the comprehensive performance requirements of the components and reduce the manufacturing co...

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): B23P15/00
CPCB23P15/00
Inventor 谌继明李佳霖张启航王平怀郑鹏飞杨波王长浩黄攀张志杰
Owner SOUTHWESTERN INST OF PHYSICS