Effects of Rare Earths and Al on Structure and Performance of High Chromium Cast Iron Containing Wolfram
来源期刊：JOURNAL OF RARE EARTHS2006年第2期
论文作者：Huang Yongchang Guo Erjun Fu Yuanke Wang Liping
Key words：RE-Al; modification; heat treatment; high chromium cast iron containing wolfram; rare earths;
Abstract: Effects of RE and Al on the structure, impact toughness, hardness, and wear resistance of high chromium cast iron containing wolfram were investigated.The results show that without modification the volume fraction of austenite is high and the carbide appears to be thick lath and the grain size is relatively large;proper modification using RE combined with Al can reduce volume fraction of residual austenite in the as-cast structure obviously, refine grain size of primary austenite notably, and make the morphology of carbide changing from thick lath to thin lath, rosette, and feather-like modification can also increase hardness, wear resistance and impact toughness of cast iron.
Huang Yongchang1，Guo Erjun1，Fu Yuanke1，Wang Liping1
(1.School of Materials Science ＆ Engineering, Harbin University of Science and Technology, Harbin 150040, China)
Abstract:Effects of RE and Al on the structure, impact toughness, hardness, and wear resistance of high chromium cast iron containing wolfram were investigated.The results show that without modification the volume fraction of austenite is high and the carbide appears to be thick lath and the grain size is relatively large;proper modification using RE combined with Al can reduce volume fraction of residual austenite in the as-cast structure obviously, refine grain size of primary austenite notably, and make the morphology of carbide changing from thick lath to thin lath, rosette, and feather-like modification can also increase hardness, wear resistance and impact toughness of cast iron.
Key words:RE-Al; modification; heat treatment; high chromium cast iron containing wolfram; rare earths;
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