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Welding method for seal welding between zirconium alloy tubes and plates

A technology of zirconium alloy tubes and welding methods, which is applied in welding equipment, welding accessories, metal processing, etc., can solve the problems of high quality hidden dangers and inconvenient welding operations, and achieve the effects of good welding quality, high welding efficiency, and improved processing efficiency

Active Publication Date: 2021-12-21
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problems to be solved by the present invention are: welding operation is inconvenient and quality hidden dangers are relatively large

Method used

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  • Welding method for seal welding between zirconium alloy tubes and plates
  • Welding method for seal welding between zirconium alloy tubes and plates
  • Welding method for seal welding between zirconium alloy tubes and plates

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Embodiment

[0028] Such as Figure 1 to Figure 5 As shown, the sealing welding method between the zirconium alloy tubes and plates of the present invention, taking the sealing welding of the zirconium alloy composite tube plate and the zirconium alloy heat exchange tube using U-shaped groove as an example, includes the following steps.

[0029] In the first step, in order to ensure that the size and plasticity of the snap ring are basically the same, the zirconium alloy welding wire to be welded is bent and cut to form a split ring, such as Figure 5 As shown, the snap ring is used together with two rings, one snap ring clips the groove on the heat exchange tube, and the other snap ring clips the groove, and its cross-sectional area is larger than that of the welding wire used for conventional zirconium alloy welding. Larger, so it has a melting point not higher than that of the base metal during self-melting, good fluidity during welding, good wettability and ability to fill gaps, and ex...

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Abstract

The invention relates to zirconium alloy seal welding, and discloses a welding method for seal welding between zirconium alloy tubes and plates, which comprises the following steps of: processing a seal welding groove on a composite tube plate, processing a groove on a heat exchange tube, and matching the position of the groove with the position of the groove; manufacturing welding wire clamping rings matched with the outer diameter of the heat exchange tube and the size of the groove in the composite tube plate, wherein the manufactured clamping rings are split rings and are used in pairs, one of the two clamping rings is used for being placed in the groove, and the other clamping ring is used for being placed in the groove; placing clamping rings in the grooves one by one in at least two batches, wherein at least one groove is arranged between each pair of clamping rings placed in the same batch, manual argon tungsten-arc welding self-melting is carried out, the clamping rings are melted in a one-layer welding mode, and welding of all the grooves is completed batch by batch. Only one-layer welding is adopted, the clamping ring plays a key role in welding forming during welding, an additional protection device does not need to be used, and the welding quality is good.

Description

technical field [0001] The invention relates to the production of a zirconium alloy heat exchanger, in particular to a welding process for sealing welding between zirconium alloy tubes and plates. Background technique [0002] Since zirconium and zirconium alloys have excellent corrosion resistance, they can resist the corrosion of most organic acids, inorganic acids, strong alkalis and some molten salts. Therefore, some key components in corrosive environments can use zirconium materials to increase their service life. In recent years, zirconium and its zirconium alloys have been widely used in chemical industry and other fields, which can improve product quality, extend the service life of equipment, reduce energy consumption, reduce costs, prevent pollution, improve working conditions and increase labor productivity. very important. [0003] At present, zirconium alloys are used more and more widely in heat exchangers. During the welding process of sealing welding betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/16B23K9/32B23K101/14
CPCB23K9/16B23K9/32B23K2101/14Y02E30/30
Inventor 莫其鹏银润邦奚旭张涛郑周王静鸽
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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