Influence of selected rare earth metals on structural characteristics of 42CrMo4 steel

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[1] Drápala, J.
[2] Brožová, S.
[3] Szurman, I.
[4] Konečná, K.
[5] Kostiuková, G.
[6] Vontorová, J.
[7] Jonšta, P.
[8] Sobotková, K.
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| 1600年 / Faculty of Metallurgy卷 / 55期
关键词：
42crmo4 steels - Equi-axed grains - Interdendritic space - Rare earth metals - Solidification structure - Structural characteristics - Sulphide inclusions - TOF-SIMS analysis;
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摘要：
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. © 2016, Faculty of Metallurgy. All Rights Reserved.
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