Magnesium ammonia heat pipe welding method

Abstract

The invention provides a magnesium ammonia heat pipe welding method. The magnesium ammonia heat pipe welding method comprises the steps of drying and dehumidifying; temperature and humidity control: the temperature is 15-35 DEG C, and the humidity is 10-50%; welding parameters are set; argon protection: during welding, the outer side and the inner side of the tube shell of the magnesium ammonia heat tube need to be protected by argon, the inner side of the tube shell of the magnesium ammonia heat tube introduces argon into the tube shell of the magnesium ammonia heat tube through an argon pipeline for protection, and the outer side of the tube shell of the magnesium ammonia heat tube is protected by argon in a welding gun; capillary welding; an argon pipeline is connected with a capillary tube, argon is introduced into a tube shell of the magnesium ammonia heat tube for protection, the outer side of the tube shell of the magnesium ammonia heat tube is protected through argon in a welding gun, a tube opening of the magnesium ammonia heat tube is gradually reduced according to the welding method, and welding of the plug is completed; repairing and filing welding seams; welding seam detection. The welding quality of the magnesium ammonia heat pipe can be guaranteed, and therefore it can be guaranteed that the magnesium ammonia heat pipe has good isothermal performance and the service life.

Description

technical field [0001] The invention relates to the technical field of heat pipes, in particular to the technical field of magnesium ammonia heat pipes, and in particular to a welding method of magnesium ammonia heat pipes. Background technique [0002] Magnesium ammonia heat pipe is a new type of lightweight heat pipe. Compared with traditional aluminum ammonia heat pipe and copper water heat pipe, this heat pipe shell is made of magnesium alloy material, which is lighter in weight and 1 / 3 lighter than aluminum alloy. It has broad application prospects for the use of spacecraft with strict weight requirements. [0003] When making a magnesium ammonia heat pipe, it is necessary to perform capillary welding and plug welding on the magnesium ammonia heat pipe. Since the shell of the magnesium ammonia heat pipe is made of magnesium alloy material, the melting point of magnesium alloy is lower than that of aluminum alloy, and when magnesium alloy is welded, if the protection is...

AI Technical Summary

Problems solved by technology

Magnesium alloys are also easier to oxidize in the air, which brings greater difficulty to the welding of magnesium alloys

In addition, magnesium alloy is easy to react with water vapor in a high humidity environment to generate hydrogen gas, which will cause pores in the welding process and affect the quality of the weld.