汽轮机叶片局部激光表面淬火工艺试验研究

Study of laser surface hardening engineer testing on the local of steam turbine lamina

对汽轮机叶片进气边局部进行激光淬火工艺试验 ,研究工艺参数、搭接对硬化层深度、硬度及硬度分布的影响 ,分析了淬火后的组织特征 ,结果显示 :激光淬火可得到深度为 0 .2 5～0 .45mm的硬化层 ,平均硬度为HV5 88,2 0 %的搭接量可满足实际使用要求。从而 ,得到符合实际需要的优化工艺 ,以替代传统工艺。

This paper studies the engineer testing of laser quench on the gas\|in side local of steam turbine lamina. It studies the technological parameters and the influence of facular join on hardening deeth, hardness and its distribution. It analyzes the character of the quenching microstructure. The result indicates: a 0.25～0.45 deepth and an average of HV588 hardness layer can be obtained by laser hardening. An amount of 20 percent join can satisfy the operating requirements. Accordingly, optimized techniques are found out to replace the old ones.