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Centre Segregation, Soft Reduction and Oxide Cleanness for Large Diameter Line Pipe with Highest Demands on HIC
Author(s) -
Cappel Jürgen,
Flender Reinhard,
Höffken Rolf,
Kemper Gerhard,
Wünnenberg Klaus
Publication year - 2005
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200506060
Subject(s) - bend radius , materials science , bending , bowing , radius , oxide , mechanical engineering , line (geometry) , inclusion (mineral) , reduction (mathematics) , caster , composite material , structural engineering , engineering drawing , engineering , metallurgy , computer science , physics , geometry , mathematics , philosophy , theology , computer security , thermodynamics
Starting material to meet maximum demands requires low centre segregation and excellent oxide cleanness. Comparative tests were performed for this purpose on an oval‐bow caster with a 5 m radius and a vertical bending machine with a 3 m vertical section and a 9 m radius. Both types of machine are capable of producing an excellent strand‐centre quality provided strand support system settings are well monitored. Oxide cleanness is superior in slabs cast on the vertical bending machine; the inclusion band is further from the surface than on the bow caster. Sulphur prints are not suitable for inspection purposes, whereas MIDAS (Mannesmann Inclusion Detection by Analysing Surfboards) is able to detect macroscopic inclusions with certainty.