Paper Title:
Microstructure and Properties of (Ti,W)(C,N)/(Ni,Mo) Cermets after a Heat-Treatment at High Nitrogen Pressure
  Abstract

In order to decrease the heat-treatment time and avoid particle growth during the post-sintering heat-treatment, the interaction of nitrogen with (Ti,W)(C,N)/(Ni,Mo) cermets was investigated at high pressure. Sintered (Ti,W)(C,N)/(Ni,Mo) cermets with different starting formulations were heated at 1000 °C using nitrogen pressures up to 110 MPa. At this temperature and nitrogen pressure the nitriding time for the formation of interaction zones more than 20 μm thick is decreased to 3 hours and no particle growth occurs. The heat-treatment leads to a dramatic improvement in surface hardness and a very small decline in transverse rupture strength of the (Ti,W)(C,N)/(Ni,Mo) cermets. The microhardness in the near-surface area shows a transition of the highest microhardness to a lower as the interior is approached.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
1521-1523
DOI
10.4028/www.scientific.net/KEM.336-338.1521
Citation
L. Y. Zheng, W. H. Xiong, F. Y. Zhou, X. H. Zhang, "Microstructure and Properties of (Ti,W)(C,N)/(Ni,Mo) Cermets after a Heat-Treatment at High Nitrogen Pressure", Key Engineering Materials, Vols. 336-338, pp. 1521-1523, 2007
Online since
April 2007
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