International Dredging Review

International Dredging Review
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Tungsten Carbide Overlay Used

In May 1988 Dredging International began dredging at Leam Chabang Thailand where the Thai government was creating a port. The material to be dredged was abrasive sticky clay with a high concentration of titanium dioxide (TiO2.) Using their 850mm (33-inch) cutterhead dredge Amazone D.I. began the project consuming between 500 and 700 teeth per day depending on where they were working. Many different types of hardfacing materials were tested on the teeth including all iron-based chromium and complex carbide types. A significant step towards the increase of cutter tooth life was made by using a tungsten carbide hardfacing product manufactured by Durum of Krefeld Germany. The first results with a minimum product applied increased the life by a factor of four. Read More