Phase reactions during sintering of M3/2 based composites with WC additions

• Autorzy: Madej M.

Warianty tytułu

PL

Analiza spiekania kompozytów stal szybkotnąca M3/2 - węglik wolframu WC

• Języki publikacji: EN

Abstrakty

EN

Attempts have been made to describe the influence of WC additions on properties of M3/2 high speed steel (HSS) based composites. The powder compositions used to produce skeletons for further infiltration were M3/2, M3/2+10%WC and M3/2+30%WC. The powders were cold pressed at 800 MPa. The green compacts were subsequently sintered for 60 minutes at 1150°C in vacuum. These as-sintered specimens were used for copper infiltration. A qualitative EDX analysis revealed presence of both MC type vanadium-rich carbides and M₆ C type tungsten and iron rich carbides. In specimens containing 10 and 30% WC the carbide phase was uniformly distributed within copper-rich regions. The WC monocarbide reacts with the surrounding HSS matrix and forms a carbide grain boundary film. The microstructural observations of the as-sintered specimens was followed by Brinell hardness test and supplemented with dilatometric studies.

PL

Badania miały na celu określenie wpływu dodatku węglika wolframu WC na własności kompozytów na osnowie stali szybkotnącej. Do wytwarzania porowatych kształtek stosowano następujace mieszanki proszków: 100% M3/2, M3/2+10%WC i M3/2+30%WC. Mieszanki proszków prasowano pod ciśnieniem 800MPa. Część wyprasek poddano spiekaniu przez 60 minut w temperaturze 1150°C w próżni lepszej od 10^-2. Do infiltracji stosowano wypraski i porowate spieki. Analiza przy użyciu mikrosondy rentgenowskiej potwierdziła obecność dwu typów węglików: MC bogatych w wanad oraz M₆ C bogatych w wolfram i żelazo. W kształtkach z dodatkiem 10 i 30% węglika wolframu następuje rozpuszczanie węglika i rekcja z osnową stali szybkotnącej, w wyniku czego powstaje nowy węglik w postaci filmu otaczającego cząstki dodanego węglika wolframu. Dodatkowo przedstawiono wyniki badań twardości, wytrzymałości na zginanie oraz odporności na zużycie ścierne badanych kompozytów.

Słowa kluczowe

EN

M3/2 High speed steel (HSS); tungsten carbide WC; copper; metal matrix composites (MMC); sintering; infiltration

PL

stal szybkotnąca M3/2; węglik wolframu; miedź; kompozyty z osnową metaliczną (MMC); spiekanie; infiltracja

• 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: 2013
• Tom: Vol. 58, iss. 3
• Strony: 703--708
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Madej M.

• AGH University of Science and Technology, Faculty of Metal Engineering and Industrial Computer Science, Al. A. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

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