In the field of rolling, the expertise of the CRM Group also covers a wide range of activities, from process optimisation of hot and cold rolling operations and associated processes (reheating, de-scaling, cooling, coiling, etc ) to product developments.
About processes, we notably aim at optimising the overall operation of complex rolling lines by increasing productivity, efficiency and quality of products, while reducing maintenance costs. This is achieved through many contributions on:
- Mastering work roll degradation, including the control and monitoring of the degradation phenomenon and the development of new or adapted work roll grades;
- Roll cooling, which is of prime importance to ensure the performance of the roll (temperature evolution and temperature in the roll bite), and considering that the best cooling technology does not only provide an efficient and homogeneous cooling but also aims at reducing energy and water consumption;
- Lubrication, which is not only an efficient way to reduce work roll degradation and reduce energy consumption during rolling but also helps to increase the mill capabilities (higher speed, larger formats and harder grades leading to higher forces);
- Controlling the surface oxide layer formed all along the hot processing of metallic products, which is another important aspect regarding metallic yield, production costs and quality of final products;
- Through-process modelling, for the calculation of energy consumption in rolling processes and identification of opportunities for energy reduction.
The development of new and improved products is based on new hot rolling and cooling strategies such as asymmetric hot rolling, ferritic rolling and accelerated run-out table cooling for improved properties and effective use of strategic alloying elements. The CRM Group is also studying new processing routes for the production of thin hot strips, new quality of beams and rails as well as new alloying concepts.