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Title: Effect of V and N on the microstructure evolution during continuous casting of steel
Authors: Santillana, B
Eskin, DG
Boom, R
Katgerman, L
Keywords: Low Carbon (LC) steel;Continuous casting;High Strength Low Alloyed (HSLA) steel
Issue Date: 2012
Publisher: IOP Publishing
Citation: IOP Conference Series: Materials Science and Engineering, 27(1): 012059, (2012)
Abstract: Low Carbon (LC) steel is not expected to be sensitive to hot tearing and/or cracking while microalloyed steels are known for their high cracking sensitivity during continuous casting. Experience of the Direct Sheet Plant caster at Tata Steel in Ijmuiden (the Netherlands), seems to contradict this statement. It is observed that a LC steel grade has a high risk of cracking alias hot tearing, while a High Strength Low Alloyed (HSLA) steel has a very low cracking occurrence. Another HSLA steel grade, with a similar composition but less N and V is however very sensitive to hot tearing. An extreme crack results in a breakout. A previous statistical analysis of the breakout occurrence reveals a one and a half times higher possibility of a breakout for the HSLA grade compared to the LC grade. HSLA with extra N, V shows a four times smaller possibility of breakout than LC. This study assigns the unexpected effect of the chemical composition on the hot tearing sensitivity to the role of some alloying elements such as V and N as structure refiners.
ISSN: 1757-8981
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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