Laser surfacing of ZhS26 high-temperature alloy with carbides

Abstract

The numerous publications dealing with high-temperature surfacing focus mainly on the issue of resistance to high-temperature corrosion. Very few studies have been dedicated to the wear resistance of high-temeprature materials. Meanwhile, items fabricated from high-temperature alloys have to operate under a wide gamut of service conditions which require that they should have not only high heat resistance and high-temperature strength, but also improved wear resistance. The situation is aggravated still more because at elevated temperatures the contacting surfaces are more likely to seize. The failure of materials when they are raised to high temperatures adds to the danger of abrasive wear. In a search for ways and means of enhancing the wear resistance of parts fabricated from high-temperature alloys and operating under contact friction, a technique was investigated in this study for the laser surfacing of ZhS26 high-temperature alloy with refractory carbides.