Chinese Journal of Lasers, Volume. 44, Issue 11, 1102007(2017)
Microstructure and Properties of TC4-Cu Duplex Coating Prepared by Laser Melting Deposition
Based on the laser melting deposition technique, the TC4-Cu duplex coating is prepared with A3 steel as the matrix, copper alloy as the transition layer and TC4 alloy as the coating. The interface structure, chemical compositions and phase compositions are analyzed. Meanwhile, the microhardness and the corrosion resistance of this coating are tested. The results show that the atom diffusion occurs at the TC4-Cu-Fe interfaces. Solid solutions, like α-Fe and α-Ti, are formed at the interfaces. The grains in the binding area have small sizes. The Ti diffusion to the Cu-Fe interface is blocked by the transition layer successfully. The average microhardness of the coating is about 500 HV, which is about 3 times of that of the matrix. The corrosion resistance of the TC4-Cu duplex coating is slightly higher than that of the commercial TC4 alloy, and far higher than that of A3 steel.
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Liao Bangquan, Xu Liang, Zhou Shengfeng, Yang Guang, Shang Chun, Lei Jianbo. Microstructure and Properties of TC4-Cu Duplex Coating Prepared by Laser Melting Deposition[J]. Chinese Journal of Lasers, 2017, 44(11): 1102007
Category: laser manufacturing
Received: May. 22, 2017
Accepted: --
Published Online: Nov. 17, 2017
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