Abstract
Procedures for the analysis of the blocky (“primary”) carbides and of the matrix in high-speed tool steels with scanning transmission electron microscopy-energy dispersive X-ray (STEM-EDX) are described. Results for the alloys AISI Tl, M2, and M7 and for an experimental, Nballoyed material are reported and compared to determinations by quantitative metallography in scanning electron microscopy (SEM), combined with compositional analysis by SEM-EDX. With proper precautions, good accuracy can be obtained with either method, and the results obtained by the two routes are in good agreement.
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