大型汽轮机转子轴颈激光熔覆修复再制造技术及应用  

Laser Cladding Remanufacture Technology on Large Rotor in Steam Turbine

作　　者：全威 Quan Wei(Shanghai Electric Power Generation Equipment Co.,Ltd Shanghai Turbine Plant,Shanghai,China)

机构地区：[1]上海电气电站设备有限公司上海汽轮机厂,上海

出　　处：《科学技术创新》2023年第16期206-210,共5页Scientific and Technological Innovation

摘　　要：汽轮机转子自重大,转速快,转子轴颈因润滑油系统运行情况不佳或其他因素会发生磨损,引起转子振动超标或其他安全隐患。针对这类在役转子轴径的损伤,先进的激光熔覆修复再制造技术可以消除损伤,修复质量满足转子长期安全运行要求,跟传统熔焊修复技术相比更加灵活、高效。本文所涉及的应用案例即是一种应用半导体激光器作为热源,使用激光熔覆的方法在损伤轴颈表面熔覆修复层的一种修复技术。激光熔覆层与母材结合强度高,焊接热输入小,自动化程度高,轴颈修复焊缝质量完好,修复前后转子各形位尺寸无明显变化。Generally,rotor in steam turbine rotate at high speed and weight high.The journal occasionallygot injured because of lack of lubricants or other factor,which would increase the rotor train vibration and other risk.Compared to traditional method such as melt welding advanced laser cladding is more productive and flexible when operating these injuries.The application case mentioned in this paper is a repair technology that uses semiconductor lasers as a heat source and uses laser cladding to repair the damaged journal surface.The application achieved a high bonding strength between the cladding layer and the base metal,while the heat input is low.The whole process achieve a high automation degree,and also fine repair quality.Furthermore,there is no obvious change in the shape and size of the rotor before and after repair.

关 键 词：转子轴颈 激光熔覆 修复 

分 类 号：TG4[金属学及工艺—焊接]