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

Abstract:

Article Preview

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

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.