| JIANG Wei,HU Fang-you,DAI Jing-tao.Basic Research on the Repair of Turbine Nozzle by C02 Laser Cladding[J],37(2):56-58 |
| Basic Research on the Repair of Turbine Nozzle by C02 Laser Cladding |
| Received:December 17, 2007 Revised:April 10, 2008 |
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| DOI： |
| KeyWord:Laser cladding Ni-based high-temperature alloy Turbine nozzle Microstructure Micro-hardness |
| Author | Institution |
| JIANG Wei |
Qingdao Branch, Naval Aeronautical Engineering Academy, Qingda0 , China |
| HU Fang-you |
Qingdao Branch, Naval Aeronautical Engineering Academy, Qingda0 , China |
| DAI Jing-tao |
Qingdao Branch, Naval Aeronautical Engineering Academy, Qingda0 , China |
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| Abstract: |
| 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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