Simulated Welding Heat Affected Zone Toughness and Microstructure Transformation of a Ti-Zr Microalloyed Low Carbon Steel

Chao Wang; Ming Hao Shi; Peng Yan Zhang; Fu Xian Zhu; Guo Dong Wang

doi:10.4028/www.scientific.net/AMR.816-817.124

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 816-817Simulated Welding Heat Affected Zone Toughness and...

Simulated Welding Heat Affected Zone Toughness and Microstructure Transformation of a Ti-Zr Microalloyed Low Carbon Steel

Abstract:

Acicular ferrite (AF) can significantly improve the performance of steels and can be promoted through special inclusions. The present experimental steel was a low carbon Ti-Zr deoxidized and microalloyed steel. The welding heat affected zone (HAZ) simulation indicated that under high heat input (100 kJ/cm) and peak temperature (1400°C) conditions, the HAZ exhibited high impact toughness (150 J, -20°C) and desired microstructure. Isothermal heat treatment data suggested that grain boundary ferrite formed at ~600°C and AF formed at ~500°C. Intragranular plates sheaves formed at ~450°C. MnS coherent precipitation on ZrO₂TiO_x inclusions promoted AF nucleation.

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Periodical:

Advanced Materials Research (Volumes 816-817)

Pages:

124-128

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.816-817.124

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Online since:

September 2013

Authors:

Chao Wang, Ming Hao Shi, Peng Yan Zhang, Fu Xian Zhu, Guo Dong Wang

Keywords:

Acicular Ferrite, Inclusion, Low Carbon Steel, Ti-Zr Microalloying, Welding Heat Affected Zone (HAZ)

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