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

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...

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.

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