Strip properties and processing in twin roll casting of stainless and low carbon steels

Abstract

Metallurgical features of the twin‐roll strip casting process are discussed. The as‐cast structure of two austenitic stainless steels is evaluated using EPMA and metallography. Cleanness levels as reached in twin‐roll strip casting are compared with conventional and thin slab casting. In‐line annealing is described as a method for grain refinement. The scale layer on twin‐roll cast strip is characterised for low carbon and stainless steels.

Conditions of Liquid Steel Treatment for Near Net‐Shape Casting Processes

“…This is in coincidence with observations at the Eurostrip casting facilities. After deoxidation with silicon stainless steel AISI 304 shows an inclusion size spectrum with the peak of a relative frequency at 0-2.5 µm in comparison with slab casting where the peak is at the class of 5-7.5 µm [15]. For low carbon strip casting data are given by the BHP/ IHI developing team for a 2 mm thick ascast strip; the sizes of oxide inclusions are 2-8 µm in the case of silicon killing, too [16].…”

Present Status and Perspectives of European Research in the Field of Advanced Structural Steels.

“…Further developments on strip casting route are in progress, such as in-line heat treatments of work-hardened as-cast steel strips. 21) To conclude, a rapid glance to future research on HS steels; recent European Projects are in progress to ascertain some basic aspects controlling microstructure formation and properties, such as: 22) (1) understand the nature of the UF structure, its effect on a single property (e.g. validity of Hall-Petch relation) and the mechanisms that can be exploited to improve a combination of properties (e.g.…”