Effect of adding CeO2 on properties of Al-Ti laser clad coating on aluminum alloy

doi:10.13251/j.issn.0254-6051.2021.09.042

Abstract

Abstract: Effect of adding of rare earth oxide CeO₂ on properties of Al-Ti coating on aluminum alloy by laser cladding was studied. Firstly, the effects of lap ratio on microstructure, microhardness and wear resistance of the coatings were analyzed. Then, the effects of CeO₂ on the properties of the coatings were studied under the condition of 40% lap ratio. The results show that the properties of the coating are the best when the lap ratio is 40%.The microhardness is 284.82 HV0.3, which is 106% higher than that of the substrate; the friction coefficient is 0.440, which is 32% lower than that of the substrate; the wear rate is reduced to 0.0105 mm³·N^-1·m^-1.The grain size is refined and the microhardness and wear resistance of the coating are greatly improved by adding CeO₂. When the content of CeO₂ is 8%, the overall properties of the coating is the best. The microhardness is 305.58 HV0.3, which is increased by 7.3% than that without CeO₂; the friction coefficient is almost the same as before, but the wear rate is only 0.0087 mm³·N^-1·m^-1, which is 17% lower than that without CeO₂.

Key words: laser cladding, CeO₂, aluminum alloy, microstructure, microhardness, wear resistance

CLC Number:

TG178

Miao Xiaojin, Xia Sihai,Wu Meiping, Yu Jinghu, Zhao Zishuo, Cui Chen, Zhang Chunlei. Effect of adding CeO₂ on properties of Al-Ti laser clad coating on aluminum alloy[J]. Heat Treatment of Metals, 2021, 46(9): 234-240.

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Effect of adding CeO₂ on properties of Al-Ti laser clad coating on aluminum alloy

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