Corrosion and wear resistance of AISI 316L and 470 stainless steel by plasma nitriding

Abstract

The stainless steel are known for their corrosion resistance, which enable them to be used in severe working conditions such as petroleum and gas industry, chemical industry and orthopedic implants. However, they have low wear resistance. In this work, the thermochemical nitriding treatment is performed in two types of stainless steels, the AISI 316L and 470 by varying the material treatment time. The specimens plasma nitriding will be performed at different times, the fixed-temperature gas mixture of N2 and H2. Thus, the formed layers are characterized by metallographic analysis, microhardness measurements, and determination of the formed thickness layer. Corrosion tests shall be made on the basis of material and processed materials. Thus, it is possible to compare the corrosion resistance of stainless steels studied and verify that the nitriding treatment interferes with the corrosion resistance of these materials. Tests microwear by fixed sphere will be conducted to verify the influence of the layer formed on the wear resistance of the materials studied.