In the production process of centrifugal casting of rolls made by medium nickel infinite chilled ductile iron,the air hole and dross were generated from the process,so we adopt pre-deoxygenation to control the usage rate of rare earth-magnesium nodulizing agent,to increase pouring speed and moulding sand gas permeability,to control the usage of mixed covering slag and the container matching timing within 3 min,and the other measures,then the reject rate of roll neck caused by air hole and dross was decreased from 40％to 6％,the reject rate was decreased effectively.
关键词
无限冷硬球墨铸铁轧辊/离心复合铸造/气孔/夹渣
Key words
infinite chilled ductile iron roller/centrifugal composite casting/air hole/dross
维普
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