A High Notch Toughness Agglomerated Flux for Submerged Arc Welding of Pipeline Steel

De Liang Ren; Bo Liao; Changling Xu; Lianhai Hu; Fu Ren Xiao

doi:10.4028/www.scientific.net/KEM.306-308.405

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 306-308A High Notch Toughness Agglomerated Flux for...

A High Notch Toughness Agglomerated Flux for Submerged Arc Welding of Pipeline Steel

Abstract:

By using the mathematical uniform design, a new agglomerated flux for high speed and multi-arc submerged arc welding (SAW) has been developed in this paper, which performs excellently in welding process, and the effects of flux composition on the welding characteristics is analyzed as well. The mechanical tests show that the weld metal obtained in SAW with this flux exhibits high toughness at low temperature, and the other mechanical properties of the weld metal also satisfy the technical specifications for the West to East Pipeline Project in China. The microstructures of the weld metal are also examined. Both optical and TEM microphotoes demonstrate that the weld consists mainly of small-sized and uniformly distributed acicular ferrite. These microstructures can effectively prevent the initiation and propagation of micro cracks, resulting in high notch toughness of the weld metal at low temperature.

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Periodical:

Key Engineering Materials (Volumes 306-308)

Pages:

405-410

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.306-308.405

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Online since:

March 2006

Authors:

De Liang Ren, Bo Liao, Changling Xu, Lianhai Hu, Fu Ren Xiao

Keywords:

Agglomerated Flux, Flux Composition, High Notch Toughness, Pipeline Steel, Submerged Arc Welding (SAW), Uniform Design

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References

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