Influence of Nitrocarburizing on Increasing the Service Life of Elastic Elements of Direct Flow Valves
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Date
2021
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Jan Evangelista Purkyne University in Usti nad Labem
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Abstract
The effect of the nitrocarburizing process in pastes with heating in a chamber furnace on the structure
and strength characteristics of 09Cr15Ni8Al corrosion-resistant steel was investigated. The technology of
thermochemical treatment was developed, which included nitrocarburizing in pastes with heating in a
chamber furnace at different holding times. The thickness of the diffusion layer and its microhardness
were determined after nitrocarburizing. To determine the efficiency and select the modes of thermochemical treatment, tests were carried out for the investigated steel's strength characteristics. The main
feature of the structure of the diffusion layers of valve steels, obtained by nitrocarburizing in the nitrogencarbon paste, is the presence of an inhomogeneous layer with clearly distinguished zones.
Keywords
Direct-Flow Valve Plates, Nitrocarburizing in Pastes, Corrosion-Resistant Steel, Carburizer, Fatigue Strength
Citation
Krmela J, Hovorun T, Berladir K, Artyukhov A, Kasian S. Influence of Nitrocarburizing on Increasing the Service Life of Elastic Elements of Direct Flow Valves. Manufacturing Technology. 2021;21(5):647-656. doi: 10.21062/mft.2021.071.