鼓风机叶片激光熔覆的应用研究

Application of Laser Cladding to Air-blower Vane

结合电站用鼓风机叶片的失效分析，提出了在叶片表面激光熔覆镍基ＷＣ合金的工艺方法。结果表明，采用激光功率密度为３．５Ｘ１０４Ｗ／ｃｍ２，作用时间为０．０６ｓ的辐照工艺，获得了与基体呈冶金结合，组织致密均匀，具有高硬度、高耐磨性和优异的抗酸性介质腐蚀性能的熔覆合金层，实际生产检验表明，激光熔覆叶片的性能明显优于未经熔覆的１５ＭｎＶ钢叶片。

Ni-Cr-B-Si+WC alloys were coated on the surface of the air-blower vanes bylaser cladding at 3.5×104 W/cm2Power density and 0.06 s time-Period. The bonding areabetween alloy and matrix shows metallurgical combination. The laser cladded compact andeven structural coating possesses great hardness and high resistance to abrasion and corrosionof acids.It has been tested in practice that the Properties of vanes with laser cladded coatingare remarkably better than those of vanes of the steel 15MnV.