Sintering of AISI M2 High Speed Steel with the Addition of NbC

Alexandre Wentzcovitch; Francisco Ambrozio Filho; Luís Carlos Elias da Silva; Mauricio David Martins das Neves

doi:10.4028/www.scientific.net/MSF.727-728.90

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HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Sintering of AISI M2 High Speed Steel with the...

Sintering of AISI M₂ High Speed Steel with the Addition of NbC

Abstract:

The influence of adding 6 wt% (NbC) niobium carbide on the sintering temperature and microstructure of high speed steel - AISI M₂ (0.87% C, 5.00% Mo, 6.00% W, 4,00% Cr, 2.00% V and Fe bal.) powder was studied. The starting material was obtained by vacuum melting followed by atomization in water. The samples were axially cold compacted in a cylindrical matrix and then vacuum sintered at 1250 and 1350 °C. Dilatometry and differential scanning calorimetry measurements indicated an increase in sintering temperature with addition of niobium to the AISI M₂ steel. Optical and scanning electron microscope observations revealed a microstructure with uniformly distributed niobium carbides.

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Materials Science Forum (Volumes 727-728)

Pages:

90-95

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.727-728.90

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Online since:

August 2012

Authors:

Alexandre Wentzcovitch, Francisco Ambrozio Filho, Luís Carlos Elias da Silva, Mauricio David Martins das Neves

Keywords:

High Speed Steel, Microstructure, NbC, Powder metallurgy, Sintering

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