改善Fe-B-C合金韧性的研究

Study on Improving the Toughness of Fe-B-C Alloy

作者：匡加才(长沙理工大学材料科学与工程学院，湖南长沙410076)；符寒光(清华大学先进成形制造教育部重点实验室，北京100084)；叶昌(长沙理工大学材料科学与工程学院，湖南长沙410076)

Author：(College of Material Sci. and Eng., Changsha Univ. of Sci. and Technol.,Changsha 410076,China)；(Key Lab. for Advanced Manufacturing by Materials Processing Technol.,Tsinghua Univ.,Beijing 100084,China)；(College of Material Sci. and Eng., Changsha Univ. of Sci. and Technol.,Changsha 410076,China)

收稿日期：2005-03-21 年卷（期）页码：2006,38(4):105-109

期刊名称：工程科学与技术

Journal Name：Advanced Engineering Sciences

关键字：Fe-B-C合金;硼化物;变质处理;冲击韧性;导卫板

Key words：Fe-B-C alloy;boride;modification;impact toughness;guide piece

基金项目：中国博士后科学基金资助项目（2004036058）

中文摘要

为了提高Fe-B-C合金的韧性，应用稀土-钛-氮复合变质剂改善Fe-B-C合金组织和性能。结果发现，Fe-B-C合金复合变质处理后的凝固组织明显细化，且组织分布均匀，并出现钛硼化合物，钛硼化合物不同于普通Fe-B-C合金中的Fe2B呈网状分布，而是呈断网状和块状分布，特别是经高温热处理后，硼化物变成球状和棒状，Fe-B-C合金韧性明显提高，由8～10 J/cm2提高至22～25 J/cm2。经变质处理的Fe-B-C合金可用于制造轧钢机导卫板，其耐磨性比高镍铬合金钢提高1.3倍。

英文摘要

In order to improve the toughness of Fe-B-C alloy, the effect of Rare earth(RE)-Ti-N composite modification on the microstructures and properties of Fe-B-C alloy was researched. The results showed that the solidification structures of Fe-B-C alloy is refined obviously and the distribution of structures is uniform after composite modification. Moreover, the compound containing boron and titanium appeared in Fe-B-C alloy containing RE-Ti-N. The compound containing boron and titanium was different from the network Fe2B in the common Fe-B-C alloy, whose distribution was broken network and lump. After heat treatment the boride in Fe-B-C alloy containing RE-Ti-N turned into nodular and rod and the toughness of Fe-B-C alloy is increased obviously, from 8～10 J/cm2 to 22～25 J/cm2. Fe-B-C alloy containing RE-Ti-N was used to produce the guide of rolling mill, its abrasion resistance is 1.3 times higher than that of high Ni-Cr alloy steel.

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论文摘要

改善Fe-B-C合金韧性的研究

Study on Improving the Toughness of Fe-B-C Alloy