Thermal residual stress analysis of diamond coating on graded cemented carbides
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Finite element model was developed to analyze thermal residual stress distribution of diamond coating on graded and homogeneous substrates. Graded cemented carbides were formed by carburizing pretreatment to reduce the cobalt content in the surface layer and improve adhesion of diamond coating. The numerical calculation results show that the surface compressive stress of diamond coating is 950 MPa for graded substrate and 1 250 MPa for homogenous substrate, the thermal residual stress decreases by around 24% due to diamond coating. Carburizing pretreatment is good for diamond nucleation rate, and can increase the interface strength between diamond coating and substrate.
Key wordsgraded cemented carbides diamond coating finite element method carburizing
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- FISCHER U K R, HARTZELL E T, AKERMAN J G H. Cemented carbide body used preferably for rock drilling and mineral cutting: US Patent, 4743515[P]. 1998-05-10.Google Scholar
- AKERMAN J G H, FISCHER U K R, HARTZELL E T. Cemented carbide body with extra tough behavior: US Patent, 5279901[P]. 1994-01-18.Google Scholar
- FISCHER U K R, HARTZELL E T, AKERMAN J G H. Cemented carbide body with a binder phase gradient and method of make the same: US Patent, 4820482[P]. 1989-04-11.Google Scholar
- CHEN Li, WU En-xi, WANG She-quan, LIU Chang-bin, YIN Fei, LU Yu-xiang. Formation mechanism of surface ductile zones in WC2Ti(C, N)2Co gradient cemented carbide[J]. Journal of Central South University: Science and Technology, 2006, 37(4): 650–654. (in Chinese)Google Scholar
- YIN Fei, CHEN Kang-hua, WANG She-quan. Influences of functionally graded structure of substrate on performance of coated cemented carbide[J]. Journal of Central South University: Science and Technology, 2005, 36(5): 776–779. (in Chinese)Google Scholar
- TAMURA I, TOMOTA Y, OZURA H. Strength and ductility of Fe-Ni-C alloys composed of austenite and martensite with various strength [C]// Proc Third Int Conf Strength of Metals and Alloys. Cambridge: Institute of Metals, 1973: 611–615.Google Scholar
- KIEFFER R, SCHWARZKOPF P. Hardmetals[M]. WANG Shao-gang, translate. Beijing: China Industry Press, 1963. (in Chinese)Google Scholar