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A kind of ultra-thin high temperature resistant universal welding backing

A technology of welding backing and high temperature resistance, applied in welding equipment, welding medium, welding equipment, etc., can solve the problems of affecting welding quality, low welding efficiency, irregular welding seam, etc., and achieve good quality of welding seam and high welding efficiency , Weld seam corrugation uniform effect

Inactive Publication Date: 2019-11-05
CHENGDU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technology discloses that its materials include sintering flux, phenolic resin, urotropine aqueous solution and other substances. The gasket prepared by using this scheme will cause thermal decomposition of phenolic resin and other substances containing C, H, and O due to high temperature during the welding process. and other atoms, which will cause the weld seam to affect the welding quality
It discloses that it is suitable for all-position welding, but it actually packs the solidified finished flux into a glass fiber bag, and relies on the free movement of the granulated finished flux in the bag to be suitable for welding at various positions. This method is complex in assembly, high in cost and low in welding efficiency when welding in large quantities, and will cause irregular welds and affect welding quality

Method used

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  • A kind of ultra-thin high temperature resistant universal welding backing

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Embodiment 1

[0022] A preparation method of ultra-thin high-temperature-resistant general-purpose welding pad, 140 parts of silica sol, 35 parts of CaO, 15 parts of MgO, and 3 parts of SiO with a particle size of 200-280 mesh 2 , 20 Al 2 o 3 and 2 parts of glass fibers with a diameter of 10 μm to form a flux slurry, and then apply the flux slurry in strips to the middle of the base layer to form a flux layer. Then place it at a temperature of 400-480° C. for heat preservation for 1-2 hours to form welding pads, and then arrange and bond the welding pads on the surface of aluminum foil paper to form the ultra-thin high-temperature-resistant general-purpose welding pad.

Embodiment 2

[0024] A preparation method of ultra-thin high-temperature-resistant universal welding pad, 230 parts of silica sol, 45 parts of CaO, 20 parts of MgO, 5 parts of SiO with a particle size of 200-280 mesh 2 , 25 Al 2 o 3 and 6 parts of glass fibers with a diameter of 15 μm are mixed to form a flux slurry, and then the flux slurry is coated in strips on the middle of the base layer to form a flux layer. Then place it at a temperature of 400-480° C. for heat preservation for 1-2 hours to form welding pads, and then arrange and bond the welding pads on the surface of aluminum foil paper to form the ultra-thin high-temperature-resistant general-purpose welding pad.

Embodiment 3

[0026] A preparation method of ultra-thin high-temperature-resistant general-purpose welding pad, 320 parts of silica sol, 60 parts of CaO, 35 parts of MgO, and 1 part of SiO with a particle size of 100-150 mesh 2 , 30 parts Al 2 o 3 and 8 parts of glass fiber with a diameter of 8 μm are mixed to form a flux slurry, and then the flux slurry is coated in strips on the middle of the base layer to form a flux layer with a thickness of 1.5-2 mm. After standing in the air for about 1 hour, the coating slurry The moisture in the material is evaporated to a semi-solidified state, and then the solder pad is rolled (the roller gap is adjusted to 0.8-1.2mm) by a roller press to increase the density and compactness of the solder pad, and then placed in a 400-480°C heat preservation at high temperature for 1-2 hours to form welding pads, and then arrange and bond the welding pads on the surface of aluminum foil paper to form the ultra-thin high temperature resistant universal welding pad...

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Abstract

The invention belongs to the field of welding materials, and in particular, relates to a ultrathin general weld backing capable of resisting high temperature. The weld backing comprises a weld backing bar; the backing bar comprises a base layer and a flux layer; and the flux layer comprises the following components in parts by mass: 35-60 parts of CaO, 15-35 parts of MgO, 2-5 parts of SiO2, 1-8 parts of glass fibers, 20-30 parts of Al2O, and 140-340 parts of silica sol. In the prepared weld backing, multiple weld backing bars can be connected end to end as needed; the weld backing is suitable for various arc welding methods; the welding part space is narrow; and the weld backing bars can be singly used.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to an ultra-thin and high-temperature-resistant universal welding pad. Background technique [0002] With the development of arc welding technology, single-sided welding technology is widely used in petrochemical, aerospace, steel structure and other fields. This technology has become the key to ensure the quality of industrial products. [0003] The invention application with application number 201510002945.1 discloses a flux backing material for all-position welding and its production process. This technology discloses that its materials include sintering flux, phenolic resin, urotropine aqueous solution and other substances. The gasket prepared by using this scheme will cause the phenolic resin to be thermally decomposed due to high temperature during the welding process to produce C, H, O and other atoms, which in turn will cause the weld seam to affect the welding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K9/035
CPCB23K9/035B23K35/3602B23K35/362
Inventor 张永强朱亮孙付春冯威孔清泉朱晓东王小炼彭昱程
Owner CHENGDU UNIV