Evolution of surface porosity in round steel hot rolling

MAO Xiao-hui; ZHANG Jiang-shan; YANG Shu-feng

doi:10.13374/j.issn1001-053x.2014.s1.003

Volume 36 Issue S1

Jul. 2021

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MAO Xiao-hui, ZHANG Jiang-shan, YANG Shu-feng. Evolution of surface porosity in round steel hot rolling[J]. Chinese Journal of Engineering, 2014, 36(S1): 10-14. doi: 10.13374/j.issn1001-053x.2014.s1.003

Citation:

MAO Xiao-hui, ZHANG Jiang-shan, YANG Shu-feng. Evolution of surface porosity in round steel hot rolling[J]. Chinese Journal of Engineering, 2014, 36(S1): 10-14. doi: 10.13374/j.issn1001-053x.2014.s1.003

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Evolution of surface porosity in round steel hot rolling

doi: 10.13374/j.issn1001-053x.2014.s1.003

1. School of metallurgical and ecological engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. State key laboratory of advanced metallurgy, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2013-11-18
Available Online: 2021-07-19

Abstract

Abstract

An industrial experiment was carried out to study the evolution of billet surface porosity in hot rolling of round steel.Holes were drilled at the head of a billet. Linear cracks were spot at the surface of rolled round steel in parallel. Slight decarburization appears around these cracks,which can be seen from the metallograph. Crack measurement results show that the crack depth is mainly influenced by the hole depth. When the hole depth exceeds 4 mm,serious cracks will be generated on the round steel. The crack length is mainly dependent on the hole diameter. When the hole diameter ranges from 1 to 2.5 mm,the crack length limits to 2 to 8 cm.
- steel billets,
- hot rolling,
- surface defects,
- porosity,
- cracks,
- drilling experiment