Microstructure Characterization of High Carbon Alloy from the Ni-Ta-Al-Co-Cr System

• Autorzy: Bała P.

Warianty tytułu

PL

Charakterystyka Mikrostruktury Wysokowęglowego Stopu Z Układu Ni-Ta-Al-Co-Cr

• Języki publikacji: EN

Abstrakty

EN

In the present work results of investigations of the new high carbon alloy from the Ni-Ta-Al-Co-Cr system are presented. The alloy has been designed to have a good tribological properties at elevated temperatures. The chemical composition of this material was designed to obtain a matrix strengthening by the precipitation of γ phase (Ni3(Al,Ta)) and the primary carbides volume fraction above 25%. The primary carbides should remain stable in the microstructure, regardless of the heat treatment, in order to increase a wear resistance. The results of microstructure investigations in the as-cast condition are presented. The type of phases appearing in the microstructure was determined and their morphology described. The main microstructure components of the investigated Ni-based alloy with high carbon, cobalt and chromium content are: the γ phase, which constitutes a matrix, the γ phase, which occurs as fine globular precipitates and the primary Ta and Cr carbides (of MC and M7C3 type - respectively).

PL

W pracy przedstawiono nowy stop na osnowie niklu o dużym stężeniu węgla, przewidywany do pracy w wysokiej temperaturze i w warunkach silnego zużycia tribologicznego. Skład chemiczny nowego materiału zaprojektowano tak, aby umocnienie osnowy uzyskać w wyniku wydzielania fazy γ (Ni3(Al,Ta)), a udział węglików pierwotnych wynosił ponad 25%. Węgliki powinny pozostać stabilne w mikrostrukturze niezależnie od obróbki cieplnej, wpływając korzystnie na odporność na ścieranie. Zamieszczono wyniki badan mikrostruktury stopu w stanie lanym. Określono rodzaj faz występujących w mikrostrukturze oraz opisano ich morfologie. Głównymi składnikami mikrostruktury badanego stopu na osnowie Ni, o dużej zawartości węgla, kobaltu i chromu są: faza γ (która stanowi osnowę) faza γ (która występuje w postaci drobnych kulistych wydzieleń) oraz pierwotne węgliki Ta (typu MC) i Cr (M7C3).

Słowa kluczowe

EN

Ni-based alloys; γ phase; gamma phase; carbides

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2012
• Tom: Vol. 57, iss. 4
• Strony: 937--941
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Bała P.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, 30-059 Kraków, 30 Mickiewicza Av., Poland

Bibliografia

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