向离心复合铸造镍铬钼铸铁轧辊材料添加复合变质剂RE-Al进行变质处理,研究其对镍铬钼铸铁材料组织与性能的影响。结果表明:RE-Al变质处理,能使铁液得到净化并强化晶界,改善共晶碳化物的形貌与分布,使碳化物由网状破碎为块条状且分布均匀,细化奥氏体晶粒组织。在添加变质剂RE为0.3%、Al为0.3%时,其变质处理后的综合性能最好。 The compound modifier RE-Al was added into the centrifugal composite cast nickel-chromium-molybdenum cast iron roll material to modify the microstructure and properties of Ni-Cr-Mo cast iron. The results show that RE-Al modification can purify the molten iron and strengthen grain boundaries, improve the morphology and distribution of eutectic carbides, make the carbides broken into strips and distribute uniformly by mesh, and refine austenite Body grain structure. When the modification agent RE is 0.3% and Al is 0.3%, the comprehensive performance after modification is the best.