Microstructure evolution of TiC cermets with ferritic AISI 430L steel binder. (27th May 2018)

• Record Type: Journal Article
• Authors: Kolnes, Märt; Mere, Arvo; Kübarsepp, Jakob; Viljus, Mart; Maaten, Birgit; Tarraste, Marek
• Is Part Of: Powder metallurgy. Volume 61:Number 3(2018)
• Page Start: 197
• Page End: 209
• Publication Date: 2018-05-27
• Subjects: Titanium carbide-based cermets -- alternative steel binders -- microstructure evaluation -- phase formation; Powder metallurgy -- Periodicals; 671.3705
• DOI: 10.1080/00325899.2018.1447268
• Languages: English
• ISSNs: 0032-5899

Abstract

ABSTRACT: From the outlook of healthcare, economic importance and supply risk, utilisation of raw materials like tungsten, cobalt and nickel should be reduced or replaced with other metals. Nontoxic titanium carbide and iron are the top-of-the-line solution for displacing these materials. Our focus was on conventionally fabricated titanium carbide-based cermets with a chromium ferritic steel binder. To study microstructural evolution, specimens were sintered at different temperatures (600–1500°C). We used a scanning electron microscopy, X-ray diffraction and differential scanning calorimetry to analyse the microstructure and phase formation of the cermets. Our results showed that during the solid and liquid phase sintering of the TiC–FeCr cermet, chromium ferrous complex carbides M7 C3 are formed and as a result, chromium content in the binder phase is decreased. Alloying TiC–FeCr cermets with strong carbide formers improves the structural homogeneity of the cermets. Also, mechanical characteristics (hardness, fracture toughness) were evaluated.