ANÁLISE DA TRANSFERÊNCIA DE CALOR DURANTE O RESFRIAMENTO DE CILINDROS DE TRABALHO DA LAMINAÇÃO A QUENTE DE PLANOS

The roll cooling in Hot Rolling of flats directly affects two fundamental characteristics of the rolls:.the durability due to surface degradation. The other is the thermal expansion, which affects the shape and dimensions of the strip. Cooling is done by water jets that need to be properly adjusted....

Full description

Saved in:
Bibliographic Details
Published in:Tecnologia em metalurgia, materiais e mineração materiais e mineração, 2013-07, Vol.10 (3), p.191
Main Authors: Salimani, Marcio Rodrigo, Barbosa, Ronaldo Antônio N M, Leocadio Junior, Hormando
Format: Article
Language:Portuguese
Subjects:
Cooling
Cooling effects
Degradation
Durability
Efficiency
Heat transfer coefficients
Hot rolling
Hydraulic jets
Rolls
Strip
Thermal expansion
Water pressure
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The roll cooling in Hot Rolling of flats directly affects two fundamental characteristics of the rolls:.the durability due to surface degradation. The other is the thermal expansion, which affects the shape and dimensions of the strip. Cooling is done by water jets that need to be properly adjusted. The determination of heat transfer coefficients is essential to optimize the process and thus increase its durability and quality of the strip. Results of experimental and numerical effects of cooling using a water jet fan-shaped on a prototype roll at temperatures between 50°C and 350°C are performed. Water pressure, nozzle type and the position along the length of the fan-shaped (center and edge) influence the efficiency of roll cooling. The maximum value found in the coefficient of heat transfer was 6.0 kW/m2.°C, and a 14.3% difference between the center and end of the jet fan-shaped is observed.
ISSN:2176-1515
2176-1523
DOI:10.4322/tmm.2013.028