IMPARTING HIGH-TEMPERATURE WEAR RESISTANCE TO TURBINE BLADE Z-NOTCHES

摘要

A method of imparting wear-resistance to a contact face of a turbine blade Z-notch comprising applying a flexible cladding sheet comprising a Co-based cladding alloy and an organic binder to the contact face of the Z-notch, heating the turbine blade Z-notch with flexible cladding sheet thereon to volatilize the organic binder and remove it from the cladding sheet, and further heating the turbine blade Z-notch with flexible cladding sheet thereon to sinter the cladding sheet by liquid phase sintering, thereby cladding the cladding sheet to the contact face to produce a wear-resistant layer thereon.

主权项

1. A method of imparting wear-resistance to a contact face of a turbine blade Z-notch comprising:
applying a flexible cladding sheet comprising a Co-based cladding alloy and an organic binder to the contact face of the Z-notch; heating the turbine blade Z-notch with flexible cladding sheet thereon to volatilize the organic binder and remove it from the cladding sheet; further heating the turbine blade Z-notch with flexible cladding sheet thereon to sinter the cladding sheet by liquid phase sintering, thereby cladding the cladding sheet to the contact face to produce a sintered wear-resistant layer thereon; wherein the turbine blade Z-notch is constructed of a Ni-based superalloy and the Co-based cladding alloy comprises between about 5 and about 20 wt % Cr, between about 22 and about 32 wt % Mo, between 1 and about 4 wt % Si, between about 0.05 and about 0.5 wt % B, and balance Co, plus incidental impurities; wherein said further heating to sinter the cladding sheet is to a temperature between about 2100° F. and about 2280° F.; wherein the cladding sheet has a thickness between about 0.01 and about 0.125 inch.