Microstructure of Laser Cladded Cobalt-Based Alloy Coating on T10 Tool Steel
Co-based alloy coating was fabricated by powder feeding laser cladding on T10 tool steel. The microstructure and phase composition were investigated by scanning electron microscope (SEM) and X-ray diffractometer (XRD). The results showed that the different solidification microstructures on the section, such as planar, cellular and dendrite formed from the interface to the surface. The main phase γ-Co and another phase Cr23C6 existed in the original coating, however, the main phase γ-Co was unchanged, and another phase was replaced by Cr7C3 accompanying with Co3C and Co4B precipitations after aging treatment.
Long Chen, Yongkang Zhang, Aixing Feng, Zhenying Xu, Boquan Li and Han Shen
Q. Zhao et al., "Microstructure of Laser Cladded Cobalt-Based Alloy Coating on T10 Tool Steel", Key Engineering Materials, Vol. 464, pp. 694-697, 2011