TY - JOUR
T1 - Fabrication of nickel composite coatings reinforced with TiC particles by laser cladding
AU - Yang, Sen
AU - Chen, Na
AU - Liu, Wenjin
AU - Zhong, Minlin
AU - Wang, Zhanjie
AU - Kokawa, Hiroyuki
N1 - Funding Information:
One of the authors (S. Yang) is grateful to Japan Society for the Promotion of Science for offering a JSPS fellowship. The authors would like to express their gratitude to 985 Science Foundation of Tsinghua University (Grant No. 081100500), Innovation Foundation of Astronautic Science and Technology, Postdoctoral Science Foundation of China and Postdoctoral Science Foundation of Tsinghua-Zhongda for financial support.
PY - 2004/5/24
Y1 - 2004/5/24
N2 - Various weight ratios of TiC particulate nickel-based composite coatings were produced on carbon steel substrates by laser cladding. The experimental results showed that the coating was uniform, continuous and free of cracks when a CaF2 flux was used. Excellent bonding between the coating and the medium carbon steel substrate was ensured by the strong metallurgical interface. The microstructures of the coating were mainly composed of γ-Ni dendrites, M23C6, a small amount of CrB, and dispersed TiC particles. The morphologies of TiC particles changed from the globular, cluster to flower-like shape. The volume fraction of TiC particles and the microhardness gradually increased from the bottom to the top of the coating, and the volume fraction of TiC particles increased with increasing of volume fraction of Ti and C. The maximum microhardness of the coatings with 10, 15 and 20 wt.% (Ti + C) in the preplaced alloy powder was approximately HV0.2750, HV0.2850 and HV0.2920, respectively, which was much larger than that of the steel substrate, HV0.2240.
AB - Various weight ratios of TiC particulate nickel-based composite coatings were produced on carbon steel substrates by laser cladding. The experimental results showed that the coating was uniform, continuous and free of cracks when a CaF2 flux was used. Excellent bonding between the coating and the medium carbon steel substrate was ensured by the strong metallurgical interface. The microstructures of the coating were mainly composed of γ-Ni dendrites, M23C6, a small amount of CrB, and dispersed TiC particles. The morphologies of TiC particles changed from the globular, cluster to flower-like shape. The volume fraction of TiC particles and the microhardness gradually increased from the bottom to the top of the coating, and the volume fraction of TiC particles increased with increasing of volume fraction of Ti and C. The maximum microhardness of the coatings with 10, 15 and 20 wt.% (Ti + C) in the preplaced alloy powder was approximately HV0.2750, HV0.2850 and HV0.2920, respectively, which was much larger than that of the steel substrate, HV0.2240.
KW - Gradient distribution
KW - In situ formation
KW - Laser cladding
KW - Nickel-based alloy
KW - TiC particle
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U2 - 10.1016/j.surfcoat.2003.09.062
DO - 10.1016/j.surfcoat.2003.09.062
M3 - Article
AN - SCOPUS:2442471905
VL - 183
SP - 254
EP - 260
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
SN - 0257-8972
IS - 2-3
ER -