The slag erosion of wind power spindle forgings refers to the corrosion and wear phenomenon on the metal surface caused by the high temperature and high-speed flow of liquid metal slag at the position where the bearing support is directly connected to the main shaft of the power plant (UHP turbine, 5MW and above main engine).
Slag erosion mechanism mainly includes the following aspects:
- Chemical corrosion: harmful components such as alkali metals and oxides in the slag will react with the metal surface, resulting in chemical corrosion of the metal surface.
- Hot scouring: the slag is in a fluid state at high temperature, and its high-speed flow has a scouring effect and erodes the metal surface.
- Mechanical wear: The particles or aggregates in the slag can produce mechanical wear on the metal surface, further aggravating the erosion.
In view of the slag erosion problem of wind power spindle forging, it can be controlled from the following aspects:
- Choose the right steel: the steel with high wear resistance, corrosion resistance and high temperature strength is preferred to improve the slag resistance of the forging.
- Change the lubrication method: optimize the lubrication method and materials to reduce the adhesion and erosion of slag.
- Strengthen cooling measures: Adopt appropriate cooling methods to reduce the temperature of the forging surface and slow down the erosion rate of slag.
- Strengthen cleaning and maintenance: clean the wind power spindle regularly, remove the accumulated slag, and repair or replace the damaged forgings in time.
- Adopt protective measures: Add protective measures at the connection between the spindle and the power device, such as the use of high temperature and corrosion resistant sheath, etc., to reduce the direct erosion of slag on the forging.
In short, the slag erosion of the wind power spindle forging is a complex problem, which needs to consider multiple factors such as material selection, lubrication, cooling measures, cleaning and maintenance, and take corresponding control measures to improve the anti-slag erosion ability of the forging and extend its service life.
