Laser Cladding of Co-Based Alloy on 2Crl3 Stainless Steel

摘要

2Crl3 stainless steel was surface cladded with Co-based alloy using a high power carbon dioxide laser. The microstructure and the wear resistance and corrosion properties of the clad layer were investigated. It was found that the high temperature corrosion behavior and wearing resistant property of the clad layer were 3 and 3.5 times better than the parent metal. Under the high temperature molten lead sulphate salt corrosion condition, the clad layer failed by spalling which was caused by intergrannular corrosion within the clad layer. The fine dendritic structure and the Co-based alloy oxide help to retard the penetration rate of the sulphur ion that induces the intergrannular corrosion.