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- Niobium carbide (13)
- Wear (11)
- NbC (10)
- Friction (6)
- Hardness (5)
- Machining (5)
- Niobium carbide (NbC) (4)
- Cermet (3)
- Cutting tools (3)
- Fe3Al (3)
- Mechanical properties (3)
- Microstructure (3)
- Sintering (3)
- Tungsten carbide (WC) (3)
- Abrasion (2)
- Binder (2)
- Cobalt (2)
- Cutting material (2)
- Cutting tool (2)
- Hard materials (2)
- Hard metal (2)
- Hot steam (2)
- Liquid phase sintering (LPS) (2)
- Ni (2)
- Nickel (2)
- Semi-finishing (2)
- Simulation (2)
- Tool wear (2)
- Turning (2)
- Turning trials (2)
- Wear mechanisms (2)
- Abbott (1)
- Alumina (1)
- Aluminum (1)
- Apha-alumina (1)
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- Cemented carbide (1)
- Chemical stability (1)
- Co (1)
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- Flank wear (1)
- Fracture toughness (1)
- Gas pressure sintering (1)
- Grain growth (1)
- Hard tungsten (1)
- Hard-turning (1)
- Hardmetal (1)
- Hartstoffphasen (1)
- Inserts (1)
- Interrupted milling (1)
- Iron-based alloys (1)
- Liquid phase sintering (1)
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- Metal (1)
- Metal matrix composite (1)
- Niobium Carbide (NbC) (1)
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- Spark plasma sintering (SPS) (1)
- Steam (1)
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- Temperature (1)
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- Tribology (1)
- Tungsten carbide (1)
- Verschleißbeständigkeit (1)
- WC (1)
- Wear behaviour (1)
- Wear resistance (1)
- cutting materials (1)
- niobium carbide (1)
- wear protection (1)
Organisationseinheit der BAM
The present work deals with Niobcarbid (NbC). Strategic reflections on tungsten carbide and more and more stringent toxicological restrictions for cobalt associated for both with spiraling stock market prices have attracted recently some attention for Niobium carbide as a substitute for tungsten carbide in machining.
The aim of the study presented in this paper is to highlight the potential of niobium carbide cutting tool inserts for machining and to compare their performance to commercially available tungsten carbide inserts. In this work, a comparison between a conventional Wc-Co insert and NbC-Co inserts was carried out under hard machining conditions on specimens made of 100Cr6 bearing steel grade (SAE 52100).
Full densification of Fe, Co and Ni bonded NbC based cermet’s was achieved by pressure less liquid phase sintering in vacuum for one hour at 1420°C. The hardness and toughness of the NbC matrix cermet’s can be mainly tailored by the binder composition and secondary carbide additions. Ni binder based NbC cermet’s allow the combination of high hardness and improved toughness. The addition of lesser amounts of VC/Cr3C2 in a NbC partially substituted WC-Co cemented carbide increased significantly the hardness in combination with a moderate fracture toughness.