I.K. Ibraev, I.K. MECHANISM OF FORMATION OF INTERNAL AND SURFACE DEFECTS IN CASTING AND THEIR TRANSFORMATION INTO SURFACE DEFECTS OF SHEET. Eurasian Physical Technical Journal 2024, 21, 28–37, doi:10.31489/2024no1/28-37.
I.K. Ibraev, I.K. MECHANISM OF FORMATION OF INTERNAL AND SURFACE DEFECTS IN CASTING AND THEIR TRANSFORMATION INTO SURFACE DEFECTS OF SHEET. Eurasian Physical Technical Journal 2024, 21, 28–37, doi:10.31489/2024no1/28-37.
I.K. Ibraev, I.K. MECHANISM OF FORMATION OF INTERNAL AND SURFACE DEFECTS IN CASTING AND THEIR TRANSFORMATION INTO SURFACE DEFECTS OF SHEET. Eurasian Physical Technical Journal 2024, 21, 28–37, doi:10.31489/2024no1/28-37.
I.K. Ibraev, I.K. MECHANISM OF FORMATION OF INTERNAL AND SURFACE DEFECTS IN CASTING AND THEIR TRANSFORMATION INTO SURFACE DEFECTS OF SHEET. Eurasian Physical Technical Journal 2024, 21, 28–37, doi:10.31489/2024no1/28-37.
Abstract
The results of a study of the processes of formation of macro- and micro-inhomogeneity of ingots and rolled sheets are presented. To study the nature and sources of surface defects in rolled sheets, a comparative method of structural-concentration analysis of metal at the end-to-end metallurgical process of ingot - slab - sheet metal has been developed, based on the metallographic method of studying the structure and qualitative analysis of non-metallic inclusions. The research results showed that the quality of the surface of rolled sheets is determined mainly by the physical heterogeneity of the crust zone of the ingots, and the internal defects of thin rolled sheets largely depend on the contamination of the metal with non-metallic inclusions and off-axis segregation. A mechanism for transforming defects in the casting cortical zone into surface and internal defects in rolled sheets is proposed.
Keywords
ingot; macro- and micro-inhomogeneity; slab; rolled sheet metal; defectl; structure
Subject
Engineering, Metallurgy and Metallurgical Engineering
Copyright:
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