LASER SURFACING OF ZHS26 HIGH-TEMPERATURE ALLOY WITH CARBIDES

The numerous publications dealing with high-temperature surfacing focu s mainly on the issue of resistance to high-temperature corrosion. Ver y few studies have been dedicated to the wear resistance of high-tempe rature materials. Meanwhile, items fabricated from high-temperature al loys have to operate under a wide gamut of service conditions which re quire that they should have not only high heat resistance and high-tem perature 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 par ts fabricated from high-temperature alloys and operating under contact friction, a technique was investigated in this study for the laser su rfacing of ZhS26 high-temperature alloy with refractory carbides.