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

Zr-Ni brazing filler metal used for nuclear reactor core structure brazing and preparing method and application of Zr-Ni brazing filler metal

A core structure, a technology for nuclear reactors, applied in welding equipment, welding/cutting media/materials, welding media, etc., can solve problems such as the toxicity of Be element, avoid grain growth, easy to process production and use, low heat The effect of the neutron absorption cross section

Inactive Publication Date: 2018-11-30
HARBIN INST OF TECH
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a kind of Zr-Ni solder used for nuclear reactor core structure brazing and its preparation method and application in order to solve the problem that the Be element in the brazing filler metal used for the brazing of the Zr4 alloy structure of the reactor is highly toxic.

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
  • Zr-Ni brazing filler metal used for nuclear reactor core structure brazing and preparing method and application of Zr-Ni brazing filler metal
  • Zr-Ni brazing filler metal used for nuclear reactor core structure brazing and preparing method and application of Zr-Ni brazing filler metal

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0029] Embodiment 1: In this embodiment, the Zr-Ni solder used for brazing the nuclear reactor core structure is prepared from 82% to 84% Zr and the remainder Ni in mass percentage.

[0030] This embodiment has the following beneficial effects:

[0031] 1. Both Zr and Ni elements in the Zr-Ni solder in this embodiment have a low thermal neutron absorption cross section and good corrosion resistance, which can meet the requirements of the reactor internal environment for material radiation resistance and corrosion resistance;

[0032] Two, when the content of Ni in the present embodiment Zr-Ni solder is 16~18%, the liquidus temperature of solder is 960~980 ℃, close with Zr-Be solder melting point; Compared with Zr-24Zn solder, Zr-29Mn solder can reduce the brazing temperature and avoid the decrease in the performance of the base metal caused by grain growth;

[0033] 3. The Ni element in the Zr-Ni solder of this embodiment is non-toxic, compared with the Be-containing solder, ...

specific Embodiment approach 2

[0034] Specific embodiment two: present embodiment is used for the preparation method of the Zr-Ni solder of nuclear reactor core structure brazing, carries out according to the following steps:

[0035] 1. Weighing 82% to 84% of metal Zr and the rest of metal Ni as raw materials according to the mass percentage of the elements, cleaning and drying the raw materials, and then placing them in a copper crucible of an electric arc melting furnace;

[0036] 2. Gas washing treatment of electric arc melting furnace;

[0037] ①. First, evacuate the arc melting furnace to (0.9~1)×10 -1 Pa, and then pass argon gas to the vacuum degree of 0.9 ~ 1MPa;

[0038] ②. Repeat step ① for 2 to 4 times, and finally inject argon until the vacuum degree is 4.5 to 5 MPa;

[0039] 3. Carry out arc melting for 3 to 4 times, and perform magnetic stirring during the arc melting process to obtain brazing filler metal ingots, and finally cut the brazing filler metal alloy into pieces and polish them wit...

specific Embodiment approach 3

[0044] Embodiment 3: This embodiment is different from Embodiment 2 in that: the cleaning agent used in the cleaning of the raw materials described in step 1 is alcohol. Other steps and parameters are the same as in the second embodiment.

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

No PUM Login to View More

Abstract

The invention discloses Zr-Ni brazing filler metal used for nuclear reactor core structure brazing and a preparing method and application of the Zr-Ni brazing filler metal, and relates to Zr-Ni brazing filler metal and the preparing method and application of the Zr-Ni brazing filler metal. In order to solve the problem that in existing brazing filler metal for reactor Zr4 alloy structure piece brazing, the Be element is hypertoxic, the Zr-Ni brazing filler metal is prepared from, by mass ratio, 82%-84% of Zr and the balance Ni. According to the preparing method, raw materials are weighed, washed and dried to be placed into a crucible; and electric arc melting is carried out, cutting is carried out to form sheets, and the Zr-Ni brazing filler metal is obtained. The melting point of the Zr-Ni brazing filler metal is similar to the melting point of Zr-Be brazing filler metal, the brazing temperature can be reduced, the Ni element in the brazing filler metal is non-toxic, and therefore processing, producing and use are easier. The Zr-Ni brazing filler metal is suitable for welding a Zr4 alloy.

Description

technical field [0001] The invention relates to a Zr-Ni solder and its preparation method and application. Background technique [0002] In recent years, with the rapid development of the global economy, fossil energy such as coal, oil, and natural gas has been consumed in large quantities, and the resulting energy crisis has attracted widespread attention. As a safe, clean, economical form of energy that can be used on a large scale, nuclear energy has gradually been recognized around the world, bringing hope for solving energy problems. In the past few decades, all countries have vigorously developed nuclear power technology, and the structure of reactors has also been continuously optimized. In the current water-cooled reactor, Zr4 alloy is a very important core structure material. It has the advantages of small thermal neutron absorption cross section, high thermal conductivity, and moderate mechanical properties. It is often used as fuel rod cladding and guide tube fue...

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): B23K35/32B23K35/14B23K1/008B23K1/20C22C1/02C22C16/00
CPCB23K1/008B23K1/20B23K35/0222B23K35/32C22C1/02C22C16/00
Inventor 张杰漆秦
Owner HARBIN INST 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