Functionally graded cermets

• Autorzy: Jaworska L. , Rozmus M. , Królicka B. , Twardowska A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Cermets have very good plasticity and high hardness. Functionally graded cermets secure obtaining of cutting tools with hard wear resistance surface layer and ductile body frame. A new FGM was obtained using P/M method. Design/methodology/approach: Materials were obtained using free sintering at vacuum and the high temperature-high pressure sintering method. Functionally graded cermets have more amount of hard phase in the surface layer and lower participation of this phase in the body frame. FGMs were prepared by the layers pressing method and the centrifugal deposition method. Findings: Material with 55 wt.% of TiC and 45 wt.% of (Ni,Mo) was prepared. The phase’s composition of this material was analysed. The ring structure of material and complex carbides formation was confirmed. The gradient of the phase composition and hardness measurement are presented. Phase composition of FGM strongly depend on conditions of centrifugal sedimentation process: duration, rotation speed, solid content, dispersive liquids. The centrifugal deposition process of powders forming guarantees gradient phase composition for materials obtaining the powder metallurgy methods. The FGM obtained by powders forming method should be sintered using pressure processes in a closed containers (or special assembly) because of materials high porosity which is a result of various chemical contents of this same material parts. Practical implications: Due to their low chemical affinity to steel and the resistance for high temperatures oxidation, cermets have better cutting properties than carbides. Application of cermet inserts guarantees the high quality of machined surface (low roughness). Cermets could be used in “dry cutting” processes. Originality/value: The centrifugal deposition method for powders with phases content gradient forming is original value.

Słowa kluczowe

EN

tool materials; functionally graded materials; centrifugal deposition; HP sintering

PL

materiały narzędziowe; tworzywa gradientowe; osadzanie odśrodkowe; spiekanie HP

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 17, nr 1-2
• Strony: 73--76
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wykr.

Twórcy

autor

Jaworska L.

• Materials Engineering Department, Institute of Advanced Manufacturing Technology, ul. Wroclawska 37a, 30-224 Krakow, Poland
• Pedagogical University of Cracow, Institute of Technology, ul. Podchorazych 2, 30-084 Krakow, Poland

autor

Rozmus M.

• Materials Engineering Department, Institute of Advanced Manufacturing Technology, ul. Wroclawska 37a, 30-224 Krakow, Poland

autor

Królicka B.

• Materials Engineering Department, Institute of Advanced Manufacturing Technology, ul. Wroclawska 37a, 30-224 Krakow, Poland

autor

Twardowska A.

• Pedagogical University of Cracow, Institute of Technology, ul. Podchorazych 2, 30-084 Krakow, Poland

Bibliografia

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