FILLER METAL 50 AS A WELD OVERLAY IN WASTE INCINERATION APPLICATIONS

摘要

The lifetime of boiler tubes and waterwall panels in waste incineration plants can be increased significantly by weld cladding. For this purpose FM 625 is widely used. In lab trials in artificial waste incinceration gas and in field trials in waste incineration plants also overlay weldments of FM 50 on carbon steel showed excellent corrosion resistance. Due to its demonstrated corrosion resistance and because of its good weldability FM 50 was recently selected as a weld overlay material for super heater tubes of a waste incineration plant in Italy. This paper introduces FM 50 and presents its application for use as weld overlays on water-wall and super heater tubes. The behavior of weld overlays of FM 50 in artificial waste incineration gas atmospheres are compared to those of FM 625. Results of field trials show the applicability of FM 50 under real waste incineration conditions.