Research on Cladding Process of Metal Powder during Laser Additive Manufacturing

Kai Zhang; Xin Min Zhang; Xiao Feng Shang

doi:10.4028/www.scientific.net/AMM.380-384.4311

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 380-384Research on Cladding Process of Metal Powder...

Research on Cladding Process of Metal Powder during Laser Additive Manufacturing

Abstract:

The process of laser additive manufacturing consists of depositing successive layers of molten metal powder to create a near-net shape. A high-power laser is used to melt incoming metal powder, which forms a molten pool on the surface. As the latter moves beneath the laser, this newly created molten pool solidifies. By properly controlling the trajectory of deposition tracks, one can create a diverse range of shapes with varying complexities. In nature, the laser additive manufacturing technology is a continuous multilayer laser cladding process under the control of computer. The microstructure morphology of cladding layer is essential for the performance of as-deposited metal parts, so the cladding process was studied through related experiment. Based on the solidification theory, the microstructure morphology and the evolution rule were comprehensively analyzed. The results indicate that the temperature gradient and the solidification rate are the primary factor determining the microstructure morphology of cladding layer.

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Periodical:

Applied Mechanics and Materials (Volumes 380-384)

Pages:

4311-4314

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.380-384.4311

Citation:

Cite this paper

Online since:

August 2013

Authors:

Kai Zhang, Xin Min Zhang, Xiao Feng Shang

Keywords:

Directional Solidification, Laser Additive Manufacturing, Laser Cladding, Metal Powder, Microstructure Morphology

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References

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