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Effects of Rare Earth on Behavior of Precipitation and Properties in Microalloyed Steels

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【Author】 Lin Qin 1* , Chen Bangwen 2, Tang Li 3, Li Liansheng 1, Zhu Xingyuan 2, Wang Huaibin 3 (1. Department of Physical Chemistry,University of Science and Technology Beijing, Beijng 100083,China; 2. National Enterprise Technology Center,Wuhan Iron and Steel(Group)Company, Wuhan 430080, China; 3. Panzhihua Iron and Steel (Group) Company, Panzhihua 617000, China)

【机构】 Department of Physical Chemistry； University of Science and Technology Beijing； National Enterprise Technology Center； Wuhan Iron and Steel(Group)Company； Panzhihua Iron and Steel (Group) Company； Panzhihua Iron and Steel (Group) Company Beijng 100083； China； Wuhan 430080； China； Panzhihua 617000； Beijng 100083； China；

【Abstract】 The influence of rare earths on the behavior of precipitation of 14MnNb,X60 and 10MnV steels was studied by STEM, XRD, ICP and thermal simulation method. The main carbonitride precipitates are Nb(C, N),(Nb, Ti)(C, N)and V(C, N). In austenite RE delays the beginning of precipitation, and decreases the rate of precipitation. In ferrite RE promotes precipitation and increases the amount of equilibrium carbonitride precipitation. RE can make precipitates fine, globular and dispersed in the microalloyed steels. With the increase of the amount of RE in steel, the amount of precipitation increases. The promotion effect is weakened with excessive RE. RE has only little influence on the strength of microalloyed steel, but it can improve impact toughness effectively.更多还原

【关键词】 metal materials； microalloyed steel； precipitation； properties； rare earths；
【Key words】 metal materials； microalloyed steel； precipitation； properties； rare earths；

【基金】 ProjectsupportedbytheMinistryofScienceandTechnologyofChina (2 0 0 2BA3 15A 5 )

【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2003年02期

【分类号】TG142
【被引频次】7
【下载频次】101

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