Author(s)

S. Gubenko & M. Iskov

Abstract

The influence of non-metallic inclusions on the strengthening of steels by laser treatment S. ~ubenko"~ & M. lskovl I Metal Science Department, National Metallurgical Academy of Ukraine 2 st. ~ o h n s College, Oxford, UK Abstract Structural changes in steels matrix near different non-metallic inclusions were investigated. The influence of these changes on the structure and strength of inclusion-matrix boundaries and also on the mechanism and parameters of the microcrack formation near non-metallic inclusions is shown. 1 Introduction Steels contain non-metallic inclusions, which influence on the character of strengthening during laser quenchmg. In process of treatment non-metallic inclusions can melt, fully or partly or remain solid. In spite of short-term treatment, energy of the laser ray turn out sufficient for melting of the highly melt and light melt inclusions, and also for the development of mass transfer processes, whch leads to enrichment of steel matrix elements of inclusions and tr

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