Effect of tin content on microstructures and mechanical properties of Ti(C,N)/NiCr cermets
WANG Quanzhao; LIU Yue; GUAN Dehui;YU Baohai; CHEN Zhiliang; BI Jing
Institute of Metal Research; The Chinese Academy of Sciences
Cite this article:
WANG Quanzhao; LIU Yue; GUAN Dehui; YU Baohai; CHEN Zhiliang; BI Jing. Effect of tin content on microstructures and mechanical properties of Ti(C,N)/NiCr cermets. Acta Metall Sin, 2005, 41(11): 1121-1126 .
Abstract Ti(C,N)/NiCr cermets were vacuum sintered by powder metallurgy technology. The effects of TiN additions on microstructures and mechanical properties of Ti(C, N)/NiCr cermets were investigated. Results revealed that the hard phase particles were refined and the morphology of the particles changed
from a circular to a polygonal shape by the additions of TiN because of the formation of Ti(C,N) solid solution; With increasing TiN
additions, the bonding strength increased to the maximum values at 4%TiN content during low sintering temperature and at 6%TiN content during high sintering temperature, respectively, and then decreased. Hardness
changed little when TiN addition was less than 10%, but decreased dramatically when TiN addition exceeded 10%. Fracture photograph showed that trans-granular fracture was
the main failure mode because of the good interface bonding strength between binding phase and ceramic hard phase.
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