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A zirconium and zirconium alloy welding process

A welding process and zirconium alloy technology, applied in the field of zirconium and zirconium alloy welding process, can solve the problems of insufficient gas supply and no recovery of argon gas.

Active Publication Date: 2016-03-02
THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during the welding process, improved special tooling is used to ensure that the temperature of the zirconium tube welding area may exceed 200°C and all parts are effectively protected by sufficient inert gas. Usually, argon gas protection is used, and multiple argon gas cylinders are connected in series. Gas supply, there will be insufficient gas supply, and the used argon has not been recovered. At the same time, due to the high requirements for the purity of argon, the requirements for the sealing of the argon filling device are more stringent.

Method used

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the embodiments, so that those skilled in the art can implement it with reference to the description.

[0021] The invention provides a zirconium and zirconium alloy welding process, which comprises the following steps before the welding process:

[0022] The first step is to place the zirconium and zirconium alloy substrate to be welded on the concave support, and place the welding rods in parallel in the groove, and the concave support extends downward to fix the ground with the ground;

[0023] The second step is to install an argon filling device. The argon filling device is arranged on the concave support, and the contact position with the concave support is provided with a sealing device, and wraps the zirconium and the zirconium alloy substrate to be welded. The welding position forms a sealed argon-filled space;

[0024] The third step is welding preparation, passing the welding...

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Abstract

The invention provides a zirconium and a zirconium alloy welding technology. An argon supplying pipe is provided with a flow meter so that the argon flow can be controlled accurately, and the argon supplying pipe is additionally provided with an argon supplying pump so that the argon supplying power can be increased and the used argon can be recycled. The sealing performance of an argon inflating device, the welding environment and the welding quality are improved.

Description

technical field [0001] The invention relates to a welding process, in particular to a zirconium and zirconium alloy welding process. Background technique [0002] Zirconium is a rare and precious metal material with unique physical and chemical properties, high melting point, low specific heat melting and thermal conductivity. When heated to the welding temperature, it is easy to melt the oxides on the surface of the material and react with most elements and compounds. It will cause deterioration of the mechanical properties and corrosion resistance of the material, and it will react with hydrogen, oxygen, nitrogen and other gases at high temperature. Hydrogen, oxygen, nitrogen and zirconium form brittle compounds, which sharply reduces the plasticity, toughness and corrosion resistance of zirconium. Therefore, during the welding process, improved special tooling is used to ensure that the temperature of the zirconium tube welding area may exceed 200°C and all parts are eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/235B23K9/23B23K33/00
CPCB23K9/167B23K9/23B23K9/235B23K33/00
Inventor 潘兰兰杨锐卢杰辉
Owner THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG