中镍无限冷硬球墨铸铁轧辊辊颈缺陷原因分析及应用  

Defects Cause Analysis and Application of Roll Neck Made by Medium Nickel Infinite Chilled Ductile Iron

作　　者：杨智强[1] 郭红星 YANG Zhi-qiang;GUO Hong-xing(College of Electrical Engineering,Kunming Vocational and Technical College of Industry,Anning,Kunming 650302,China;Yunnan KISC Heavy Equipment Manufacturing Group Co.,Ltd.Anning,Kunming 650302,China)

机构地区：[1]昆明工业职业技术学院电气学院,云南安宁650302 [2]云南昆钢重型装备制造集团有限公司,云南安宁650302

出　　处：《云南冶金》2024年第1期204-209,共6页Yunnan Metallurgy

基　　金：云南省教育厅科学研究基金项目资助(2023J1648)。

摘　　要：分析了中镍无限冷硬球墨铸铁轧辊离心铸造时产生气孔、夹渣的工艺原因,采取了预脱氧处理、控制稀土镁球化剂使用率、提高浇注速度、提高型砂透气性、控制混合保护渣使用量、配箱时间控制在3 min以内等措施,辊颈气孔和夹渣产生的废品率从40%降低到6%以内,有效降低了废品率。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 

分 类 号：TD451[矿业工程—矿山机电]