SURFACE COKING BEHAVIOR ON 25Cr35Ni HEAT-RESISTANT ALLOY
25Cr35Ni耐热合金表面结焦机制

The surface coking 25Cr35Ni heat\|resistant alloy was investigated in detail and the surface coking mechanism was discussed. The results revealed that the coke was consisted of typical structure of an outer layer of filamentary coke, then the lamellar coke and an inner layer of spheroidal coke. The deposition of filamentary coke is closely related to the alloy compositions, but this is not for the lamellar and spheroidal coke. The growth of catalytic filamentary coke promotes continuous coking and carburization, whereas the deposition of non\|catalytic coke retards the development of filamentary coke to some extent, which further alleviates the carburization degree of materials.