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Unusual Chemical Composition of Carbides in Rapidly Solidified High Speed Steels

Published online by Cambridge University Press:  25 February 2011

A. Tauqir ,
H. Nowotny  and
P. R. Strutt
A. Tauqir
Affiliation:
Metallurgy Department University of Connecticut Storrs, Connecticut 06268
H. Nowotny
Affiliation:
Metallurgy Department University of Connecticut Storrs, Connecticut 06268
P. R. Strutt
Affiliation:
Metallurgy Department University of Connecticut Storrs, Connecticut 06268
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Abstract

Studies of the elemental composition of carbide phases formed by rapid solidification of a Mo-base high speed steel (M7) have yielded an intriguing finding. Micro-analysis of the extracted carbides (M2C, M23C6 and MC) showea that these were unusually rich in refractory elements with values of Mo in the range 46-53 wt.%, corresponding values for Fe and Cr were low (6-12 wt.% Cr and 1.5-13 wt% Fe). This was in marked contrast with analyses of MC, M6C, M7C3 and M23C6 in the ‘unglazed’ material where Fe and Cr were major constituents. A distinctive feature was M23C6 in the rapidly solidified material which contained large amounts of Mo and W and very little Cr. It is proposed that this phase, initially formed as M6C, underwent solid-state transformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 58 , 1985 , 425
Copyright
Copyright © Materials Research Society 1986

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References

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