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将球磨与未球磨Si C/Fe-Al复合粉末作为熔覆材料,在Cr12Mo V冷作模具钢表面用激光熔覆的方法制备了Si C强化Fe-Al涂层,对其显微组织、物相结构与抗电化学腐蚀性能进行了测试。结果表明:球状结构的Si C/Fe-Al复合粉末经球磨后呈多角状结构,平均颗粒粒径由54μm减小为38μm;在球磨涂层内Si C颗粒完全溶解,与Fe-Al合金交互作用后均形成了Fe2Si、Fe Al、Al0.7Fe Si0.3与M7C3;激光熔覆球磨Si C/Fe-Al涂层的抗电化学腐蚀性能优于基材Cr12Mo V与激光熔覆未球磨Si C/Fe-Al涂层。
The Si C-reinforced Fe-Al coating was prepared by laser cladding on the surface of Cr12Mo V cold-work die steel with ball-milled and un-milled Si C / Fe-Al composite powders. The microstructure and properties Phase structure and resistance to electrochemical corrosion were tested. The results show that the spherical Si C / Fe-Al composite powders have a multi-angle structure after ball milling and the average particle size decreases from 54 μm to 38 μm. The Si C particles completely dissolve in the ball-milling coating and interact with the Fe-Al alloy Fe2Si, FeAl, Al0.7FeSi0.3and M7C3are formed after laser irradiation; the electrochemical corrosion resistance of laser cladding ball milling Si C / Fe-Al coating is better than that of Cr12Mo V laser cladding and ball milling Si C / Fe-Al coating.