Effect of Heat Input on Structure and Mechanical Properties of Low Matched Welded Joint in a 1000MPa Grade Steel

Zheng Jun Liu; Chu Ao Wang; Yun Hai Su; Fu Dong Zhao; Le Cheng Li

doi:10.4028/www.scientific.net/AMR.418-420.1184

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 418-420Effect of Heat Input on Structure and Mechanical...

Effect of Heat Input on Structure and Mechanical Properties of Low Matched Welded Joint in a 1000MPa Grade Steel

Abstract:

In order to investigate the effect of heat input on the microstructure and mechanical properties of low matched high-tensile steel welded joint, the metallurgical structure and mechanical properties of welded joint obtained with different heat input were analyzed using optical microscope , welded joint tensile test and impact test of weld metal. The results show that the optimal values are obtained when the heat input is 11.9KJ/cm,where the tensile strength is 798.45MPa and ballistic work is 69J; Weld metal microstructure is mainly composed by the primary ferrite and acicular ferrite. The width of the dendrite and grain size of the weld metal microstructure increase with the increasing of the heat input.

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Materials Processing Technology, ICAMMP2011

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Periodical:

Advanced Materials Research (Volumes 418-420)

Pages:

1184-1187

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.418-420.1184

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Online since:

December 2011

Authors:

Zheng Jun Liu, Chu Ao Wang, Yun Hai Su, Fu Dong Zhao, Le Cheng Li

Keywords:

Acicular Ferrite, High-Tensile Steel, Low Matched, Mechanical Property, Microstructure

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