| Plasma Spraying of High-Nitrogen-Bearing Steels for Wear-Resistant Coatings and Structural Applications. (1998) | |||||||||
Abstract | |||||||||
| Thermally sprayed coatings of high-nitrogen-bearing steel for corrosion resistance and wear applications were investigated. high-nitrogen steels represent a new class of engineering materials. additions of nitrogen enhance the strength, corrosion resistance, and hardness of austenitic stainless steels without sacrificing low-temperature ductility and fracture toughness. in addition, the precipitation of nitrides at the grain boundaries is slower compared to that of ferrous carbides, thus increasing the elevated-temperature use of the steels. the objective was to take advantage of these properties and produce high-nitrogen steels via plasma spraying. anfe-18cr-18mn steel with 0.61 wt% n was air and vacuum plasma sprayed over steel and aluminum substrates. plasma spraying was conducted with ar/h2, ar/he, andar/n2 plasma gasses in air, vacuum, and nitrogen atmospheres. it was found that the nitrogen atmosphere increased the nitrogen and nitride content of the coatings and improves wear and corrosion properties. the sprayed coatings were characterized for nitrogen and oxygen content, porosity, hardness, and wear resistance. | |||||||||
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