叶轮：严重汽蚀(特别是主叶片)、过度腐蚀、磨损、破损时，要求更换叶轮。
Impeller: Sure to change impeller if it has serious cavitations (main vanes in particular), over corrosion, wear and tear and breakage.
水轮机叶片有较大的工作应力、热影响区的晶粒粗大以及水介质的腐蚀性是产生机械腐蚀疲劳汽蚀的重要原因。
The larger tension stress in the hydraulic turbine blades, grain coarsening in the heat-affected zone and the causticity of fluid medium are the major causes of cavitation erosion.
每年大修时，叶轮叶片有汽蚀破坏麻点，每次大修都要焊补和打磨叶片，而且维护人员劳动强度大、工作环境差。
Annual overhaul, the impeller blades have cavitation pitting damage, each must overhaul welding and grinding blades, but also labor-intensive maintenance personnel and poor working environment.
本发明涉及汽轮机汽蚀叶片的激光原位修复方法，属于激光加工技术领域。
The invention is concerned with laser in situ remediation method for steam turbine cavitation vane, belonging to laser machining technology field.
本发明涉及汽轮机汽蚀叶片的激光原位修复方法，属于激光加工技术领域。
The invention is concerned with laser in situ remediation method for steam turbine cavitation vane, belonging to laser machining technology field.
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