Method for electric resistance welding vacuum packaging of canning tube

Abstract

The invention provides a method for electric resistance welding vacuum packaging of a canning tube. The method comprises the following steps: putting a sample in a metal canning tube of which one endis closed; vacuumizing the inner part of the metal canning tube to set vacuum degree through the open end of the metal canning tube; putting the metal canning tube between two electrodes, and electrifying two electrodes; and heating an area between the two electrodes to set temperature, and then pressurizing the heated area by using flat-nose pliers and enabling the heating area to form a closed welded joint, thus sealing the sample in the metal canning tube. The method disclosed by the invention has the advantages of good vacuum effect, high production efficiency, high seal welding efficiencyand success rate, simple structure and lower production cost.

Description

technical field [0001] The invention relates to an experimental method for vacuum sealing and welding of cladding tubes, which is suitable for heat treatment experiments or material preparation when there is no vacuum heat treatment furnace, or when raw materials need to be kept in vacuum during the preparation process (such as hot isostatic pressing preforms), It belongs to the field of material heat treatment and material preparation. Background technique [0002] At present, high-temperature quartz glass is used as the jacket tube in the vacuum packaging process of heat treatment. After vacuuming, a hydrogen-oxygen flame gun is used to heat the quartz tube to soften the quartz tube and shrink and close under the action of atmospheric pressure to complete the vacuum package. , the heating time needs to be strictly controlled during the packaging process, holes are prone to appear in the softened part of the quartz tube, and the air will flow into the vacuum system instantl...

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Problems solved by technology

[0002] At present, high-temperature quartz glass is used as the jacket tube in the vacuum packaging process of heat treatment. After vacuuming, a hydrogen-oxygen flame gun is used to heat the quartz tube to soften the quartz tube and shrink and close under the action of atmospheric pressure to complete the vacuum package. , the heating time needs to be strictly controlled during the packaging process, holes are prone to appear in the softened part of the quartz tube, and the air will flow into the vacuum system instantly, which will cause serious damage to the vacuum pump; because the quartz tube is relatively brittle, if the raw material is a quartz tube as the casing, it will not be able to hot isostatic pressing

[0003] The sealing and welding of the cladding tube used in the hot isostatic pressing preparation process is mainly carried out in the vacuum degassing furnace. The cladding tube is placed in the vacuum degassing furnace. Beam welding or other welding techniques are used to seal the sheath, which has low production efficiency and high cost; in addition, because the sheath tube is sealed and welded in a vacuum furnace, it is impossible to detect whether the sheath tube is leaking when the sealing is completed

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