Influence of atomisation on solidification microstructures in the rapidly solidified powder of the Cr–Mo–V tool steel

The paper deals with the analysis of microstructure formation in the tool steel of ledeburite type under quasi-equilibrium and non-equilibrium conditions. The quasi-equilibrium solidification behaviour was investigated by differential thermal analysis. The rapidly solidified powder was produced by t...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2001-05, Vol.304, p.540-543
Main Authors: Behulova, M., Moravcik, R., Kusy, M., Caplovic, L., Grgac, P., Stancek, L.
Format: Article
Language:English
Subjects:
Atomisation
Dendrite
Dendrite fragmentation
Rapid solidification
Remelting
Tool steel
Undercooling
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Summary:The paper deals with the analysis of microstructure formation in the tool steel of ledeburite type under quasi-equilibrium and non-equilibrium conditions. The quasi-equilibrium solidification behaviour was investigated by differential thermal analysis. The rapidly solidified powder was produced by the nitrogen gas atomisation. Three main types of solidification microstructures were observed in all granulometric fractions of rapidly solidified powder: dendritic, grain refined and compound (a mixture of dendritic and grain refined). Mechanism of microstructure transition from dendritic to non-dendritic was described.
ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(00)01511-2