Laser melting and heat treatment of m2 tool steel: A microstructural characterization View Full Text


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Article Info

DATE

1979-07

AUTHORS

Young-Won Kim, P. R. Strutt, H. Nowotny

ABSTRACT

Microstructural characterization and electron diffraction crystal structure determinations have been carried out on the tool steel M2. Detailed examination using optical microscopy and thin-film and replica transmission electron microscopy substantiate preliminary findings.2,3 Namely, that laser melted material has a two-phase σ-ferrite/austenite matrix containing a dispersion of fine M2C carbides together with a smaller amount of M23C6 carbides. Subsequent heat treatment at 560 and 1230°C increases the hardness (to a maximum value of ∼1100 VHN) by carbide precipitation. In material heat treated at 560°C there is a preponderance of M23C6 carbides together with a small amount of M2C carbides. In contrast, the effect of heat treatment at 1230°C is to produce material containing only MC1-x type carbides with diameters in the range from 20 nm to ∼1 µm. More... »

PAGES

881-886

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02658307

DOI

http://dx.doi.org/10.1007/bf02658307

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1009648621


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