The influence of processing parameters on laser cladding composite coatings on TiAl intermetallic alloy
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1.
Department of Materials & Chemical Engineering, Zhongyuan Institute of Technology, Zhengzhou 450007, China;
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2.
School of Materials Science & Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
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Received Date:
2004-10-25
Accepted Date:
2005-05-25
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Abstract
The effect of processing parameters on the microstructure and wear property of laser cladding γ/Cr7C3/TiC composite coatings on TiAl intermetallic alloy substrates with NiCr-50%Cr3C2precursor mixed powder is investigated.The results show that the microstructure of the laser cladding composite coatings is refined and the microhardness increases with the increasing of the laser beam scan-rate,but the thickness of the clad coating decreases.The laser cladding coating with the moderate(2.0mm/s) scan-rate exhibits the best wear-resistance under the full dry sliding wear test condition.
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