Sintering, microstructure and properties of WC-AISI304 powder composites

resumo

Tungsten carbide-stainless steel (AISI 304) based composites were successfully prepared by powder metallurgy routes using vacuum sintering at a maximum temperature of 1500 degrees C. The effects of the binder amount (between 6 and 15 wt.%) on the phase composition, microstructure and mechanical properties, namely hardness and fracture toughness, were investigated. Appreciable amount of (M,W)(6)C up to 12 wt.% was detected, especially for the higher SS contents. However, a good compromise between toughness and hardness was observed. Besides that, improved oxidation resistance was noticed in WC-SS based composites compared with WC-Co composites. The results are discussed having in mind the correlation between chemical composition, phase composition, microstructure and mechanical behavior. (C) 2013 Elsevier B. V. All rights reserved.

palavras-chave

STAINLESS-STEEL; FRACTURE-TOUGHNESS; RICH BINDERS; WC; PARTICLES; HARDMETALS; CARBIDES; HARDNESS; PHASE; CO

categoria

Chemistry; Materials Science; Metallurgy & Metallurgical Engineering

autores

Marques, BJ; Fernandes, CM; Senos, AMR

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