Effect of Heat Input on Toughness of Deposited Metal at -40οC of Self-Shielded Flux-Cored Wire

Shao Peng Song; Zhuo Xin Li; Guo Dong Li; Tian Li Zhang

doi:10.4028/www.scientific.net/AMR.291-294.979

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 291-294Effect of Heat Input on Toughness of Deposited...

Effect of Heat Input on Toughness of Deposited Metal at -40^οC of Self-Shielded Flux-Cored Wire

Abstract:

The effect of welding heat input ranging from 1.507 KJ/mm to 2.987KJ/mm on low temperature toughness of deposited metal made by self-shielded flux-cored wire has been investigated. The results showed that low temperature toughness decreased with the increase of heat input, and the impact fracture changed from ductile to cleavage fracture. In addition, the chemical compositions demonstrated a slight tendency to decrease with increasing heat input. While, heat input has little effect on inclusions of deposited metal. Higher heat input lead to grains coarsened further, reduced acicular ferrite and granular bainite, and increased polygonal ferrite, which mainly lead to toughness decreased.

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Periodical:

Advanced Materials Research (Volumes 291-294)

Pages:

979-983

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.291-294.979

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Online since:

July 2011

Authors:

Shao Peng Song, Zhuo Xin Li, Guo Dong Li, Tian Li Zhang

Keywords:

Acicular Ferrite, Granular Bainite, Heat Input, Inclusion, Low Temperature Toughness, Polygonal Ferrite

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