Formation of an Effective Model of the Knowledge Base Through Metallographic Images of Laser Welding Microstructures in the Conditions of Small-Series Production

Abstract

The work is devoted to the creation of an information model of the knowledge base as a set of knowledge through the relationship of high-quality metallographic images of fine-grained macro- and microstructures of the weld, the collar zone of laser butt welding of thin-walled structures and methods of controlling the crystallisation of molten metal, which are used to collect, store, update and use them, as well as means of managing all these processes. The study was conducted on the basis of computer-experimental modelling using the proposed method of laser welding of butt joints of thin-walled structures. The aim of the study is to form an information efficient model of the knowledge base by visualizing the schemes of relations of high-quality metallographic images of fine-grained macro-, microstructures of the weld and the collar zone of laser butt welding of thin-walled structures, distributions of the main components (Fe, Cr, Ni) and microhardness in the structures of welds, and the developed three methods of controlling the crystallization of molten metal, which create conditions for the formation of the maximum number of crystallization centres and minimization of the linear velocity of the weld. The object is the processes of knowledge formation through the accumulation, storage, updating and use of knowledge. The subject of the study is an effective knowledge base through metallographic images of laser welding microstructures in small-scale production. The research methods: information technologies for collecting, processing, storing information and control systems; visualisation; algorithms; decision-making in the conditions of unforeseen factors of small-scale production. Conclusions: An information-efficient model of the knowledge base is proposed, which is formed on the basis of relational relations of metallographic images, distributions of the main components and microhardness.