Paper Title:
Machining and Mechanical Characterisation of PM Materials for Valve Seat Inserts
  Abstract

This article shows some fabrication aspects related to the obtention of sintered valve seat insert. This insert was made of a mixture of high-speed steel powders and iron powders plus NbC. This is a new development aiming the substitution of Co alloys currently used for valve seat inserts. The physical properties, mechanical properties and machining behaviour are discussed. The machining characteristics in terms of tool wear, cutting forces and chips morphology of the insert was compared to available commercial insert. The machining results indicate that the material under development has potential for commercial application and shows good machining evidences, in terms of equivalent cutting forces for ceramic tool. In addition, the machining using hard metal tool was susceptible to hardness variation observed for the material under development. Therefore, the machining tests point out the necessity for a microstructure homogenisation of the obtained material.

  Info
Periodical
Materials Science Forum (Volumes 498-499)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
79-85
DOI
10.4028/www.scientific.net/MSF.498-499.79
Citation
E.S. Jesus Filho, L. Salgado, S.L. de Jesus, J.L. Rossi, M. A. Colosio, J. C. Santos, "Machining and Mechanical Characterisation of PM Materials for Valve Seat Inserts", Materials Science Forum, Vols. 498-499, pp. 79-85, 2005
Online since
November 2005
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Price
$32.00
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