Microstructures and properties of ceramic particle-reinforced metal matrix composite layers produced by laser cladding

Qingmao Zhang; Jingjiang He; Wenjin Liu; Minlin Zhong

doi:10.1117/12.571604

13 January 2005 Microstructures and properties of ceramic particle-reinforced metal matrix composite layers produced by laser cladding

Qingmao Zhang, Jingjiang He, Wenjin Liu, Minlin Zhong

Author Affiliations +

Proceedings Volume 5629, Lasers in Material Processing and Manufacturing II; (2005) https://doi.org/10.1117/12.571604
Event: Photonics Asia, 2004, Beijing, China

Abstract

Different weight ratio of titanium, zirconium, WC and Fe-based alloy powders were mixed, and cladded onto a medium carbon steel substrate using a 3kW continuous wave CO₂ laser, aiming at producing Ceramic particles- reinforced metal matrix composites (MMCs) layers. The microstructures of the layers are typical hypoeutectic, and the major phases are Ni₃Si₂, TiSi₂, Fe₃C, FeNi, MC, Fe₇Mo₃, Fe₃B, γ(residual austenite) and M(martensite). The microstructure morphologies of MMCs layers are dendrites/cells. The MC-type reinforcements are in situ synthesis Carbides which main compositions consist of transition elements Zr, Ti, W. The MC-type particles distributed within dendrite and interdendritic regions with different volume fractions for single and overlapping clad layers. The MMCs layers are dense and free of cracks with a good metallurgical bonding between the layer and substrate. The addition ratio of WC in the mixtures has the remarkable effect on the microhardness of clad layers.

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Qingmao Zhang, Jingjiang He, Wenjin Liu, and Minlin Zhong "Microstructures and properties of ceramic particle-reinforced metal matrix composite layers produced by laser cladding", Proc. SPIE 5629, Lasers in Material Processing and Manufacturing II, (13 January 2005); https://doi.org/10.1117/12.571604

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