Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A cermet tool is provided that reduces machined surface roughness of a work piece material, is excellent in wear resistance, fracture resistance, and chipping resistance, and is capable of extending tool life. The cermet tool includes from 75 to 95 volume% of a hard phase and from 5 to 25 volume% of a binder phase, wherein the hard phase has a first hard phase with a core portion of (Ti, Nb, Mo) (C, N) and a peripheral portion of (Ti, Nb, Mo, W) (C, N) or (Ti, Nb, Mo, W, Zr) (C, N), a second hard phase with both a core portion and a peripheral portion of (Ti, Nb, Mo, W) (C, N) or (Ti, Nb, Mo, W, Zr) (C, N), and a third hard phase of (Ti, Nb, Mo) (C, N), Nbs/Nbi that is a relationship between a maximum Nb amount Nbs in a surface region and an internal Nb amount Nbi in an internal region is from 0.8 to 1.2, Ws/Wi that is a relationship between a maximum W amount Ws in the surface region and an internal W amount Wi in the internal region is from 1.0 to 1.5, and area ratios A1, A2, and A3 of the respective hard phases are from 75 to 95 area% for A 1, from 4 to 24 area% for A2, and from 1 to 24 area% for A3.
A cermet tool is provided that reduces machined surface roughness of a work piece material, is excellent in wear resistance, fracture resistance, and chipping resistance, and is capable of extending tool life. The cermet tool includes from 75 to 95 volume% of a hard phase and from 5 to 25 volume% of a binder phase, wherein the hard phase has a first hard phase with a core portion of (Ti, Nb, Mo) (C, N) and a peripheral portion of (Ti, Nb, Mo, W) (C, N) or (Ti, Nb, Mo, W, Zr) (C, N), a second hard phase with both a core portion and a peripheral portion of (Ti, Nb, Mo, W) (C, N) or (Ti, Nb, Mo, W, Zr) (C, N), and a third hard phase of (Ti, Nb, Mo) (C, N), Nbs/Nbi that is a relationship between a maximum Nb amount Nbs in a surface region and an internal Nb amount Nbi in an internal region is from 0.8 to 1.2, Ws/Wi that is a relationship between a maximum W amount Ws in the surface region and an internal W amount Wi in the internal region is from 1.0 to 1.5, and area ratios A1, A2, and A3 of the respective hard phases are from 75 to 95 area% for A 1, from 4 to 24 area% for A2, and from 1 to 24 area% for A3.
CERMET TOOL
CERMET-WERKZEUG
OUTIL EN CERMET
TAKESAWA DAISUKE (Autor:in)
03.10.2018
Patent
Elektronische Ressource
Englisch
Cermet, method for producing cermet, and cutting tool
| Europäisches Patentamt | 2017