FIELD: processes for restoring steam turbine blades with damaged edges.
SUBSTANCE: method comprises steps of removing worn portion and then surfacing in impulse mode metal whose ductility exceeds that of blade material; welding on protection cover strip by two seams while forming one seam on base material of blade and forming other seam on surfaced metal. Surfaced metal has high cracking resistance; its melting temperature is less than that of base material of blade. Heat treatment with use of heat insulation jacket is performed after surfacing and welding on of protection cover strips.
EFFECT: lowered non-uniformity of structure-phase composition of material of restored blade, reduced tension residual stresses, enhanced resistance of blade against cracking, corrosion and erosion.
4 cl, 1 dwg, 1 tbl
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|
RU2617077C2 |
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RU2479400C2 |
| METHOD OF RECONDITIONING ALLOYED STEEL BLADES | 2007 |
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RU2354521C2 |
| METHOD FOR RESTORING THE CHORD LINE OF THE FEATHER FROM A HEAT-RESISTANT NICKEL ALLOY | 2022 |
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RU2791745C1 |
