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| Abrasive performance of the chromium carbide reinforced Ni3Al matrix composite cladding in different depth |
| Li Shang-Ping He-Li Luo Di Feng Xu Cao Xi-e Zhang |
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Abstract The Microstructure and room-temperature abrasive wear resistance of chromium carbide reinforced Ni3Al matrix composite cladding in different depth on nickel base alloy were investigated. The results showed that there is a great difference in microstructure and wear resistance of the Ni3Al matrix composite in different depth. Three kinds of tests, designed for different load and abrasive�� size, were utilized to understand the wear behaviour of this material. Under all three wear conditions, the abrasion resistance of the composite cladding in the depth of 6mm, namely NC-M2, was much higher than that of the composite cladding in the depth of 2mm, namely NC-M1. In addition, the wear-resistant advantage of NC-M2 was more obvious when the size of the abrasive was small. The relative wear resistance of NC-M2 increased from 1.63 times to 2.05 times when the size of the abrasive decreased from 180��m to 50��m. The microstructure of the composite cladding showed that the size of chromium carbide particles, which was mainly influenced by cooling rate of melting pool, as a function of distance from the interface between the coating and substrate was gradual. The chromium carbide particles near the interface were finer than that away from interface, which was the main reason for the different wear resistance of the composite cladding in different depth.
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Received: 03 January 2008
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Corresponding Authors:
Li Shang-Ping
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2009, Vol. 16 
