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2146 |
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Monday, May 03, 2010, Olivia Room 4:00 PM Paper and Printing |
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ColferoloyTM ? an iron-based alternative for wear resistance applications
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Gavin Stratford / Wall Colmonoy Ltd, UK Philip Allnatt*/ Wall Colmonoy Ltd, United Kingdom Harald Burkard/ BMV Burkard, Germany |
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Wall Colmonoy Ltd has developed a new generation of Iron-based powder alloys providing superior resistance to dry wear and excellent corrosion resistance. The relatively low level of alloying elements such as Ni, Cr and B, keeps the impact of fluctuating metal prices to these alloys in a reasonable range. These powders are marketed under the trade name ColferoloyTM. This paper details the properties and advantages of ColferoloyTM when compared to current ?traditional? surface treatment methods and consumables. Metallurgical examination of the ColferoloyTM deposits showed that the alloy formed sub-micron structures which afford excellent dry-wear resistance, whilst the high chromium content provides good resistance to corrosion. ColferoloyTM alloys were deposited using HVOF and PTA welding techniques. HVOF coatings were applied to engineering components to produce dense coatings with a hardness in the range of 950-1000 Vickers. ColferoloyTM was applied using PTA welding techniques to form up top 6 layers of crack-free weld deposits with a hardness on the order of 60 Rockwell C. The cost benefits of using an Iron-based alloy with low density hard phases were studied and comparisons with traditional materials were performed. This study showed that ColferoloyTM alloy is a viable alternative to current hardfacing alloys and treatments. |