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

A welding method of stainless steel plate for thermal neutron shielding

A technology of thermal neutron shielding and stainless steel plate, applied in the field of materials, can solve the problems of high-boron stainless steel with complex process, complex metallurgical process, and high production cost, and achieve the effects of small welding deformation, simple metallurgical process, and high production efficiency

Inactive Publication Date: 2020-06-02
NORTHEASTERN UNIV LIAONING
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned problems existing in the welding technology of stainless steel plates for thermal neutron shielding, the present invention provides a welding method for stainless steel plates for thermal neutron shielding. By selecting electrode materials and adopting the method of resistance spot welding, the welding is adjusted and controlled. parameters, solve the problems of complicated process, high production cost, complex metallurgical process, flux and shielding gas during welding of high-boron stainless steel, and can obtain fine and dispersed boride structure

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
  • A welding method of stainless steel plate for thermal neutron shielding
  • A welding method of stainless steel plate for thermal neutron shielding
  • A welding method of stainless steel plate for thermal neutron shielding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The composition of high-boron stainless steel is Cr 16.00%, Ni 14.50%, Mn 0.20%, Si 2.00%, B 0.50% by mass percentage, and the rest is Fe and unavoidable impurities; the composition of the boron-free stainless steel is by mass percentage It is Cr 16.00%, Ni 14.50%, Mn 0.20%, Si 2.00%, the rest is Fe and unavoidable impurities; the thickness of both is 2mm;

[0038] Stack the high-boron stainless steel plate and the boron-free stainless steel plate, and then press them with the upper electrode rod and the lower electrode rod; the direction of the pressing force of the upper electrode rod and the lower electrode rod is perpendicular to the high-boron stainless steel plate and the boron-free stainless steel plate; adopt The resistance spot welding method is used for welding, and the solder joint is cooled by cooling water during welding; the welding time is 0.16s, the welding current is 7.5kA; the voltage is 380V, and the cooling water flow rate is 3L / min; stainless steel ...

Embodiment 2

[0043] Method is with embodiment 1, and difference is:

[0044] (1) The composition of high-boron stainless steel is Cr 19.00%, Ni 9.00%, Mn 2.00%, Si0.20%, B 2.25% by mass percentage, and the rest are Fe and unavoidable impurities; the composition of the boron-free stainless steel Cr 19.00%, Ni 9.00%, Mn 2.00%, Si 0.20% by mass percentage, the rest is Fe and unavoidable impurities; both thicknesses are 2.5mm;

[0045] (2) The welding time is 0.18s, the welding current is 7.0kA; the cooling water flow rate is 4L / min;

[0046] (3) The nugget diameter of the resistance spot welding joint is 4.8mm, the maximum tensile shear force is 3.32kN, and the indentation rate is 9%; the spot welding indentation of the resistance spot welding joint is flat and uniform, without cracks and the indentation depth is moderate, There is no splash on the surface and inside of the joint, no shrinkage cavity defect, and the joint fracture mode is nugget peeling; the appearance is as follows image ...

Embodiment 3

[0049] Method is with embodiment 1, and difference is:

[0050] (1) The composition of high-boron stainless steel is Cr 17.00%, Ni 10.50%, Mn 1.0%, Si 1.00%, B 1.25% by mass percentage, and the rest are Fe and unavoidable impurities; the composition of the boron-free stainless steel Cr 17.00%, Ni 10.50%, Mn 1.0%, Si 1.00% by mass percentage, the rest is Fe and unavoidable impurities; both thicknesses are 1mm;

[0051] (2) Welding time is 0.14s, welding current is 8.0kA; cooling water flow rate is 2L / min;

[0052] (3) The diameter of the end face of the upper electrode rod and the lower electrode rod is 8mm;

[0053] (4) The pressure of the upper electrode rod and the lower electrode rod on the high-boron stainless steel plate and the boron-free stainless steel plate is 4.5kN;

[0054] (5) The nugget diameter of the resistance spot welding joint is 4.5mm, the maximum tensile shear force is 3.2kN, and the indentation rate is 6%; the spot welding indentation of the resistance s...

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
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A welding method of stainless steel plates for thermal neutron shielding, including the following steps: (1) stack high-boron stainless steel plates and boron-free stainless steel plates, and then press them with upper and lower electrode rods; The direction of the pressing force of the electrode rod is perpendicular to the high-boron stainless steel plate and the boron-free stainless steel plate; (2) resistance spot welding is used for welding, and the solder joint is cooled by cooling water during welding; a stainless steel plate for thermal neutron shielding is obtained. The method of the invention is easy to operate, has high production efficiency, large output, and is easy to realize automation; it does not require filling metal, flux, or protective gas; it has a good working environment and less pollution.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a welding method of a stainless steel plate for thermal neutron shielding. Background technique [0002] At present, with the development of the nuclear industry, in order to ensure the safety of spent fuel treatment, the demand for thermal neutron absorbing materials is rapidly increasing; high boron stainless steel has excellent thermal neutron absorption performance, excellent corrosion resistance and mechanical properties , low cost, so high-boron stainless steel has been widely used in nuclear fields such as reactor control rods, spent fuel wet and dry storage grids, spent fuel transportation and storage containers; and in the nuclear power industry, high-boron stainless steel The plates are generally welded together with boron-free stainless steel plates to be used as spent fuel storage grids, transportation and storage containers, etc. [0003] Adding boron to stainless...

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): B23K11/11
CPCB23K11/115
Inventor 刘海涛黄晓明付珊王昭杰王国栋
Owner NORTHEASTERN UNIV LIAONING
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