Effect of inoculating addition on machinability of gray cast iron
来源期刊：JOURNAL OF RARE EARTHS2009年第2期
论文作者：TIAN Baohong MA Zhanhong LIU Weiming LI Fengjun REN Fengzhang
Key words：gray cast iron; compound inoculants; machinability; microhardness difference; cross-section sensibility; homogeneity; rare earths;
Abstract: Gray cast irons were inoculated with FeSi75+RE and FeSi75+Sr inoculants. The changes of apex angle of the drills before and af-ter being used were used to evaluate machinability of gray cast irons. Effect of FeSi75+RE and FeSi75+Sr inoculants on mechanical proper-ties, machinability and sensibility of gray cast iron used in cylinder block were investigated. Experimental results showed that gray cast iron treated with 60%FeSi75+40% RE inoculants exhibited tensile strength consistently at about 295 MPa along with good hardness and im-proved metallurgical quality. While gray cast iron inoculated with 20%FeSi75+80% Sr inoculants exhibited the best machinability, the low-est cross-section sensibility and the least microhardness difference. The tool flank wear of the drill increased correspondingly with the in-crease of the microhardness difference of the matrix, indicating the great effect of homogeneity of the matrix on the machinability of gray cast iron.
TIAN Baohong1，MA Zhanhong1，LIU Weiming1，LI Fengjun2，REN Fengzhang1
(1.School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003,China;
2.Yituo Foundry Corporation,China Yituo Group Corporation Limited,Luoyang 471004,China;
3.Henan Key Laboratory of Advanced Non-ferrous Metals,Luoyang 471003,China)
Abstract:Gray cast irons were inoculated with FeSi75+RE and FeSi75+Sr inoculants. The changes of apex angle of the drills before and af-ter being used were used to evaluate machinability of gray cast irons. Effect of FeSi75+RE and FeSi75+Sr inoculants on mechanical proper-ties, machinability and sensibility of gray cast iron used in cylinder block were investigated. Experimental results showed that gray cast iron treated with 60%FeSi75+40% RE inoculants exhibited tensile strength consistently at about 295 MPa along with good hardness and im-proved metallurgical quality. While gray cast iron inoculated with 20%FeSi75+80% Sr inoculants exhibited the best machinability, the low-est cross-section sensibility and the least microhardness difference. The tool flank wear of the drill increased correspondingly with the in-crease of the microhardness difference of the matrix, indicating the great effect of homogeneity of the matrix on the machinability of gray cast iron.
Key words:gray cast iron; compound inoculants; machinability; microhardness difference; cross-section sensibility; homogeneity; rare earths;
【全文内容正在添加中】
