| Rapid solidified alloy coating is expected have unique mechanical properties, such as high strength and toughness. In this paper, the advances are reviewed in rapid solidified technology and mechanical properties of nanocrystalline metal, and the principle of electrical explosion was described. WC-Co,16Mn coating were prepared by electrical explosive spraying device. Microhardness were measured by microhardness gauge; microstructure was measured by SEM; bond strength were measured in the tensile experiment. Results show that the hardness values of coating are much higher than that of the original, average WC-Co coating grain diameter is refined less than 1μm, average 16Mn coating grain diameter is 90 nm.To analyze the effect of coating cooling rate on coating solidification, temperature field of electrical explosive spraying experiment was predigested, and the temperature field was calculated by finite element method. The results show that the law of coating and base temperature field variability with time. The effect of WC-Co coating thickness and initial temperature on the characterization of cooling rate and heating rate in coating and base was analyzed, result shows the optimized parameter of initial coating temperature,thickness. The result of the numerical simulation is helpful for the production of nanocrystal coating.
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