Effect of Heat Treatment on the Microstructure of Cast Martensitic Stainless Steel Einfluss der Wärmebehandlung auf die Mikrostruktur von nichtrostendem martensitischen Stahlguss

Van Gen Hassend, F. and Weber, S.

Volume: 58 Pages: 180-192
DOI: 10.1515/pm-2021-0013
Published: 2021

The resistance of martensitic stainless steels to wear and corrosion is greatly influenced by the martensitic matrix and the presence of carbides. The precipitation of carbides along the grain boundaries will lead to a significant decrease in fracture toughness and furthermore, will increase the risk of intergranular corrosion. With tools made of corrosion-resistant steel castings, this fact is of particular relevance as coarse eutectic carbide precipitates are normally not sufficiently dissolved during conventional austenitization. In this context, the dissolution of carbides will be studied on the basis of systematic heat treatment experiments and observed using light optical microscopy and the resulting microstructure and its impact on the mechanical properties (hardness) will be discussed in the following sections. © 2021 Walter de Gruyter GmbH, Berlin/Boston 2021.

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