Energy Balance in the Rolling of OCTG on a Stretch-Reducing Mill

• Published in: Metallurgist (New York) Vol. 60; no. 1-2; pp. 12 - 18
• Main Authors: Vydrin, A. V., Khramkov, E. V., Bunyashin, M. V.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-05-2016; Springer
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Energy use; Friction; Integral equations; Materials Science; Mathematical analysis; Metallic Materials; Pipe industry; Production management; Reduction; Rolling mills; Stands; Tubes; Tubing industry; lag zone; lead zone; energy balance; mandrel-less rolling of tubes
• ISSN: 0026-0894; 1573-8892
• DOI: 10.1007/s11015-016-0246-2

An equation is obtained to describe the energy balance of the process of rolling oil-country tubular products on a reducing mill. Numerical engineering methods are used to solve integral equations for the components of the energy balance, and it is shown that the theoretical description which is obtained can be put to practical use. A method is presented for analytically determining the lead and lag zones in tube reduction, and a relation is derived to describe how the size of the reduction in the tube’s outside diameter for different values of the friction coefficient affects the speed at which it is leaves the stand.