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Reduction of slab stock by application of natural spread in the hot rolling of plate
Author(s) -
Lundberg SvenErik,
Holmberg Anders
Publication year - 1990
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199000355
Subject(s) - slab , stock (firearms) , enhanced data rates for gsm evolution , hot rolled , narrow gap , materials science , geometry , structural engineering , geology , metallurgy , mechanics , engineering , physics , mathematics , telecommunications
In recent years new technologies such as Hi‐spread and heavy‐edge reductions have been established, in order to achieve a hot link. These technologies are mostly not applicable in existing mills. Hi‐spread technology also reduces the number of slab sizes and thus the slab stock. However slab stock can be reduced to some extent by utilizing the natural spread in rolling. The spread mechanism is quite complex and spread is influenced by roll‐gap geometry, the friction in roll gap and by the plastic properties of rolled material. The influence of friction and roll‐gap geometry are closely connected and have been fairly well investigated earlier, while the influence of plastic properties of rolled material on spread still is unknown. By deduction of a new spread formula and establishment of criteria for edge rolling necessary to obtain plate with straight edges, it was possible to reduce the slab stock for rolling of plate by in order of 10% at Ovako Steel Profiler AB in Luleå.