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| Effect of La2O3 on Hardness Distributions of Laser Clad Ferrite--Based |
| ZHAO Gaomin; WANG Kunlin; LIU Jiajun |
| Department of Mechanical Engineering; Tsinghua University; Beijing 100084 |
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Cite this article:
ZHAO Gaomin; WANG Kunlin; LIU Jiajun. Effect of La2O3 on Hardness Distributions of Laser Clad Ferrite--Based. Acta Metall Sin, 2004, 40(10): 1115-1120 .
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Abstract The morphologies of laser clad ferrite--based alloy coatings with
different contents of rare earth (RE) were observed by SEM. The
nanohardness and the elastic modulus of the near the surface
and overlapping area were tested by nanoindentation. The hardness
distribution in the coating was measured by microhardness tester. The
experimental results show that the microstructure of the coatings
with RE was refined, the spacing of second dendrites was reduced, and
spacing the
nanohardness and elastic modulus were
increased. The average hardness (HV) of the coating with RE is about 500,
which is 50 higher than that without RE. The mechanism of the RE
effect was discussed.
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Received: 13 November 2003
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