DEVELOPMENT AND INVESTIGATION OF PRECISION ROLLS OF HIGH DURABILITY FOR IMPROVING MICROBAND QUALITY

The analysis of the inter-roll pressures in the stands of 20-high mills has been refined, with the profiling of the rolls taken into account. The determination of the contact arc distance has been made more accurate, with a great curvature of the contacting surface considered. A method of defining the rational hardness of the rolls for the stands of multi-roll mills has been devised. It has been suggested that the roll durability should be enhanced due to low-temperature tempering at the moment of achievement of the set condition of reversible damageability and release of carbides, as well as due to the creation of residual compression stresses in the near-surface layers of the rolls. The conditions providing a minimum wear of the rolls and a rational transfer of the microrelief to the strip have been defined. Steels for the microband mill rolls have been recommended. A process of making precision rolls has been developed. A test batch of the rolls has been made.Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio