姜伟,胡芳友,戴京涛.CO2激光熔覆修复涡轮导向器工艺初探[J].表面技术,2008,37(2):56-58.
JIANG Wei,HU Fang-you,DAI Jing-tao.Basic Research on the Repair of Turbine Nozzle by C02 Laser Cladding[J].Surface Technology,2008,37(2):56-58 |
| CO2激光熔覆修复涡轮导向器工艺初探 |
| Basic Research on the Repair of Turbine Nozzle by C02 Laser Cladding |
| 投稿时间：2007-12-17 修订日期：2008-04-10 |
| DOI： |
| 中文关键词: 激光熔覆 镍基高温合金 涡轮导向器 微观形貌 显微硬度 |
| 英文关键词:Laser cladding Ni-based high-temperature alloy Turbine nozzle Microstructure Micro-hardness |
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| 中文摘要: |
| 为研究修复K418涡轮导向器的工艺，以C0：连续激光器为热源，在涡轮导向器试验叶片表面熔覆自配粉末，获得了微观形貌和显微硬度均优于基体组织的熔覆层。结果表明：在激光功率为800W、扫描速度为Smm/s、气流量为lUmin时，熔覆层的组织晶粒更加致密细小，与基体呈冶金结合且无微观缺陷。熔覆层最高硬度达436. 2HV，是基体硬度的1.2倍。但采用CO.激光器容易造成热作用区增大，后续将改用YAG脉冲激光器作热源，并优化材料参数和工艺参数，进一步研究修复K418涡轮导向器的新工艺。 |
| 英文摘要: |
| In order to research the technology for repairing the K418 turbine , the mixed powder by oneself was melted on the surface of turbine nozzle's blade with the C02 continual laser cladding. The laser cladding lays whose microstructure and micro-hardness superior than the substrate's can be obtained. The result indicated that : under the 800W laser power, Smm/s scanning velocity and lL/min argon current capacity, the laser cladding lays without flaw whose crystal grain is more thinner than the substrate's. The interface between substrate and cladding layer is metallurgic. The laser cladding lays whose highest degree of micro-hardness reaches 436. 2HV, is l. 2 times in contrast of the substrate's. But the thermal areas are increased easily using C02 laser, so YAG laser pulse will be diverted as heat then, and the material parameters and process parameters will be optimized further, in order to research the new technology for repairing the K418 turbine. |
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