Cutting tool
AssigneeSeco Tools AB
InventorJesper Stjernberg
Life of this patent
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Abstract
A cutting tool insert has an optimal hardness and high toughness for demanding cutting operations in hardened steel and cast iron. The cutting tool includes a substrate of cemented carbide where the cemented carbide has hard constituents of tungsten carbide (WC) and a (Co) binder phase, chromium (Cr) and at least one additional element from the group: Vanadium (V), Niobium (Nb), Molybdenum (Mo) and Iron (Fe). The cemented carbide further has a Co-content of 3.50-4.20 wt % of the cemented carbide, a Cr-content of 0.31-0.38 wt % of the cemented carbide, a WC-content of at least 95.22 wt % of the cemented carbide and wherein the cemented carbide has a coercivity of 26-32 kA/m
Claims16
A cutting tool insert comprising a substrate of cemented carbide, the cemented carbide comprising hard constituents of tungsten carbide in a metallic binder phase comprising cobalt (Co), wherein the cemented carbide further comprises chromium (Cr) and at least one additional element from the group consisting of:
- Vanadium (V), Niobium (Nb), Molybdenum (Mo) and Iron (Fe), wherein
- a content of the Co is 3.50-4.20 wt % of the cemented carbide,
- a content of the Cr is 0.31-0.38 wt % of the cemented carbide,
- a content of the WC is at least 95.22 wt % of the cemented carbide,
- and the cemented carbide has a coercivity of 26-32 kA/m.
A cutting tool insert comprising:
- a substrate of cemented carbide, the cemented carbide comprising hard constituents of tungsten carbide (WC) in a metallic binder phase including cobalt (Co), where the cemented carbide further comprises chromium (Cr) and at least one additional element from the group consisting of:
- Vanadium (V), Niobium (Nb), Molybdenum (Mo) and Iron (Fe), wherein
- a Co-content is 3.50-4.20 wt % of the cemented carbide,
- a Cr-content is 0.31-0.38 wt % of the cemented carbide,
- a WC-content is at least 95.22 wt % of the cemented carbide,
- the cemented carbide has a coercivity of 26-32 kA/m;
- and wherein
- the cemented carbide includes 0.01-0.09 wt % V;
- or wherein
- a V+Nb is maximum 0.12 wt % of the cemented carbide;
- or wherein
- a V+Nb+Mo+Fe content is maximum 0.2 wt % of the cemented carbide.
Dependencies are inferred from the claim text.