Abstract
The prescence of sulphur in carbon edges on cold-rolled annealed steel sheet from the Domnarvets Jernverk plant, and the apparent insensitivity of the carbon-edge frequency to changes in the composition of the DX-type protective atmosphere are taken as starting points for the identification of a new mechanism for the formation of carbon edges on cold-rolled steel strip during annealing. This mechanism involves the decomposition and subsequent reactions of iron sulphates with oil shown to be present on the strip at the outset of the annealing cycle,. it accounts for the carbonaceous deposit andfor the clean, bright region at the edge of the strip. Experimental evidence for the reaction mechanism as well as for the transport of iron sulphates through the tandem mill is presented. The literature on carbon edges and several possible improvements in the production line, including those which, at the Domnarvets Jernverk plant, have turned out to be extremely successful, are discussed in the light of the present findings.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
