학술논문
INFLUENCE OF SELECTED RARE EARTH METALS ON STRUCTURAL CHARACTERISTICS OF 42CrMo4 STEEL.
Document Type
Article
Author
Source
Subject
*RARE earth metals
*STRUCTURAL analysis (Science)
*CHROMIUM alloys
*INCLUSIONS in steel
*MILD steel
*METAL castings
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Language
ISSN
0543-5846
Abstract
The influence of rare earth metals (REM) addition on solidification structure of the low-carbon 42CrMo4 steel was investigated. Alloys were prepared by means of a centrifugal casting. The addition of cerium, praseodymium or mischmetal in the steel produced greatly improved solidification structure with a suppressed columnar grain zone, finer grain size in the equiaxed grain zone. The additions occurred in the steel bath in the form of REM oxide and/or oxide-sulphide inclusions and as dissolved REM segregated along with other elements at prior grain boundaries and interdendritic spaces. Microstructure (light microscope), SEM/EDX chemical microanalysis, and TOF-SIMS analysis - mapping of elements in the structure of alloys were obtained. [ABSTRACT FROM AUTHOR]