Material and technology for hydropower station runner chamber laser cladding repairing

The invention discloses a material and a technology for hydropower station runner chamber laser cladding repairing. The material comprises 55-75 wt% of cobalt, 15-35 wt% of chromium, 1-10 wt% of tungsten, 0.3-5 wt% of carbon, and the balance of silicon and boron. A cladding layer having good performances is obtained through replacing a traditional welding technology and a spraying technology withthe laser cladding technology, and the working efficiency is increased. The material and the technology are suitable for repairing annular steel plates in a hydropower station runner chamber to make the cladding layer have a good cavitation corrosion performance and a good erosion performance, and improve the bonding strength of the cladding layer and a substrate to form a fine microstructure. 本发明公开了种用于水电站转轮室激光熔覆修复的材料及修复工艺，该材料包括按重量百分比计的以下组分：钴：55%～75%；铬：15%～35%；钨：1%～10%；碳：0.3%～5%；剩余为硅和硼。通过采用激光熔覆工艺，替代传统的焊接工艺和喷涂技术，得到性能更好的熔覆层，并提高了工作效率，适用于水电站转轮室内环钢板的修复，可使熔覆层具有更好的空蚀性能、冲蚀性能，同时可提高熔覆层和基材的结合强度，形成更细密的组织结构。