| 摘要 |
In the friction welding of a blade blank (1) to a blade root (2) integral with a rotor disc (3), the blade blank (1) and the blade root (2) presenting some leading (7, 9) and trailing (8, 10) edges, oxygen is driven away from these spots by blowing a neutral gas (19) through the orifices (15) of an enveloping nozzle (12) to ensure that the formation of noxious metal oxides and nitrides is prevented.
|
