激光增材制造技术在堆内构件中的应用研究

针对钴基合金手工钨级氩弧焊（TIG）堆焊出现的质量问题，开展了钴基合金增材制造工艺研究，尤其是激光增材制造工艺参数的优化研究，然后对钴基合金增材制造层进行一系列的硬度、耐磨性能、耐腐蚀性能等试验研究，并与手工TIG堆焊层性能进行对比。对比结果表明，激光增材制造层的组织更加细化，硬度更加均匀，耐磨性与耐腐蚀性能均优于手工TIG堆焊层。 

Research on the Application of Laser Additive Manufacturing in Reactor Internals

In view of the quality problems of manual TIG overlaying of cobalt-based alloy, the additive manufacturing process of cobalt-based alloy is studied, especially the optimization of laser additive manufacturing process parameters. Then a series of experiments, including hardness, wear resistance, corrosion resistance etc., are carried out on the cobalt-based alloy additive manufacturing layer and compared with the manual TIG surfacing layer. The results show that the microstructure of the laser additive manufacturing layer is more refined, the hardness is more uniform, the wear resistance and corrosion resistance are better than that of the manual TIG surfacing layer.