In Situ TiB2 Particles Reinforced Copper Matrix Composite Coating on Mould Steel by Laser Cladding
To extend the mould cycle duration and to reduce cost, a TiB2 particulate reinforced Cu based composite coating was produced on hot-working die steel substrate using laser cladding. The experimental results showed that TiB2 particles embedded in copper based alloy were in-situ synthesized during laser processing. An excellent bonding between the coating and the substrate was obtained. The microstructure of the coating was mainly composed of -Cu dendrites and dispersed TiB2 particles. The maximum microhardness of the coating was about 800HV0.2. The wear resistance of the coating was evaluated under room temperature dry-sliding wear test condition. Due to the presence of a large amount of TiB2 particles, the composite coating exhibited excellent wear resistance compared with that of substrate.
Jian-Feng Nie and Allan Morton
X. Liu and S. Yang, "In Situ TiB2 Particles Reinforced Copper Matrix Composite Coating on Mould Steel by Laser Cladding", Materials Science Forum, Vols. 654-656, pp. 1856-1859, 2010