Abstract
To improve the surface properties of gray cast iron (GCI), chromium coating was deposited on the GCI surface treated by high current pulsed electron beam (HCPEB) irradiation. Microstructures of the modified layer were characterized by means of XRD, OM and SEM. Results show that with the increasing number of HCPEB pulses, the graphite was gradually dissolved and the alloying layer with thickness of 5 ∼ 11 μm was obtained. Besides, martensitic structures and refined austenite grains were also formed after HCPEB alloying. Results of the performance test show that the surface microhardness, wear and corrosion resistance of alloying samples were significantly improved after HCPEB alloying treatment.
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