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| Microstructure of Fe-Based Alloy Composite Coatings Reinforced by Ti(C0��3N0��7) Particles Through Laser Cladding Technology |
| QI Yong-tian,CAO Zhao-xia,SHENG Li-ying,CAO Run-ping |
| Inner Mongolia Baotou Vocational and Technical College, Baotou 014030, Inner Mongolia, China |
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Abstract Fe-based alloy layer reinforced by Ti(C,N) particles was produced on the surface of cast steel. X-ray diffraction (XRD) was used for phase identification in the composite coating. The microstructure of laser cladding layer was analyzed by means of optical microscope (OM), electron probe microscope analyzer (EPMA), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that Ti(C0��3N0��7) particle is introduced by an in-situ metallurgical reaction of TiN particle and graphite powder in the process of laser cladding. The shape of lots of Ti(C0��3N0��7) particle is irregular. The sizes of Ti(C0��3N0��7) particles range from 0��1 to 6��0 ��m, and they are dispersed evenly in the matrix, which is fine dendritic or cellular crystal. A new kind of phase named Ti(C0��3N0��7) particles are tightly bonded with ��-Fe microstructure, and there is a clean and smooth phase interface between ceramic reinforcement phase and the matrix.
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Received: 07 March 2012
Published: 23 August 2013
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| Fund:higher education fund of Inner Mongolia |
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Corresponding Authors:
Yong-Tian QI
E-mail: franck-shandong@sohu.com
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2013, Vol. 20 
