DEVELOPMENT OF SYSTEM APPROACHES TO PREVENTIVE QUALITY MANAGEMENT OF THERMO-MECHANICALLY PROCESSED K60 STEEL HEAVY PLATES

Abstract

It is shown that the quality management system is relevant to be implemented in all process areas, from the supply of
raw materials to the processes of working with consumers of products, in order to operate and achieve the development of the
enterprise. On the basis of the analysis, it has been established those additional requirements for quality indexes of rolled
products exceed the values established by normative documents, which should be taken into account when developing
technologies. It has been determined, that on the basis of the established relationships between processing parameters of
rolling and mechanical properties of finished thermomechanically processed heavy plates, which are incorporated in the
advanced methodology of preventive quality management, is possible to increase the stability of the rolling processes. The
testing of the proposed methodology showed decreases in the standard deviation of yield strength, tensile strength and percent
elongation by 44%, 31% and 46% respectively, regard to the primary data obtained when rolling K60 steel at Heavy Plate Mill
3600.