Abstract: After operating several years, the drain erosion of last stage blade of the turbine low pressure rotor may occur inordinately; and after repairing, some cracks may be occurred in the repaired area. The treatment processes for the various cracks in the last stage blade were introduced. The treatment processes can be used as reference in repairing the low pressure rotor blade of the similar turbine of other power plants.

Key words: last stage blade, crack treatment, construction process