Research on the Formation of Metal-Ceramic Surface Composite Coating by Wide-Band Laser Cladding

LASER SURFACE MODIFICATION is an importanttechnology in the fields of heat treatment and surfaceengineering of materials at present1-3].Lasercladding is a significant technology in laser surfacemodification4-7].In-situ synthesized metal-ceramiccomposite coatings fabricated by laser claddingcombine the high ductility of the bonding metal matrixwith the high strength of the ceramic particles perfectlyin the cladding layer,the rapid solidification structure isfiner than that of the cla…

Research on the Formation of Metal-Ceramic Surface Composite Coating by Wide-Band Laser Cladding

Large-area in-situ synthesized TiB2 (TiB, Fe2B)-Fe metal-ceramic composite coating has been fabricated on medium carbon steel by laser cladding with the optimal laser parameters and overlapping coefficient. The bonding interfaces between the cladding layer and the matrix and among different tracks are excellent. Microanalysis on the cladding layer shows that the morphology is a little different from each other and the element distribution and the mechanical properties are unanimous in each track while the mechanical property of the cladding layer shows a gradual change from the surface to the matrix. The in-situ separating out thin ceramic phases in the coating contribute to the improving of its properties greatly.