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| Microstructure and Mechanical Properties of Ductile Cast Iron in Lost Foam Casting with Vibration |
| Bo-tao XIAO1,2,Zi-tian FAN1,Wen-ming JIANG1,3,Xin-wang LIU1,Wei LONG1,Qiang HU1,4 |
1. State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
2. School of Materials Science and Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, Jiangxi, China
3. School of Mechanical �� Electrical Engineering,Wuhan Institute of Technology, Wuhan 430073, Hubei, China
4. Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang 330029, Jiangxi, China |
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Abstract The microstructures and mechanical properties of the ductile cast iron (DI) specimens obtained by lost foam casting (LFC) with and without vibration were investigated. The results indicate that the number of the graphite nodule increases from 175 mm-2 of the specimens produced by LFC without vibration to 334 mm-2 of the specimens produced by LFC with vibration, and the thickness of the ferrite shell increases. Meanwhile, the amount of the carbides decreases in the specimens produced by LFC with vibration and the granule structure then forms. These are mainly attributed to the ��crystal shower�� caused by the vibration. In addition, the tensile strength and elongation of DI specimens produced by LFC with vibration are improved due to the dispersion-strengthening of refined carbide and pearlite colony, uniform distribution of the graphite nodule, and increase of the amount of dimples and tearing edges.
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Received: 27 May 2013
Published: 13 November 2014
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Corresponding Authors:
Bo-Tao XIAO
E-mail: xltao_2005@163.com
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2014, Vol. 21 
