PT Journal
AU Krmela, J
   Hovorun, T
   Berladir, K
   Artyukhov, A
   Kasian, S
TI Influence of Nitrocarburizing on Increasing the Service Life of Elastic Elements of Direct Flow Valves
SO Manufacturing Technology Journal
PY 2021
BP 647
EP 656
VL 21
IS 5
DI 10.21062/mft.2021.071
DE Direct-Flow Valve Plates; Nitrocarburizing in Pastes; Corrosion-Resistant Steel; Carburizer; Fatigue Strength
AB The effect of the nitrocarburizing process in pastes with heating in a chamber furnace on the struc-ture and strength characteristics of 09Cr15Ni8Al corrosion-resistant steel was investigated. The tech-nology of chemical-thermal 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 chemical-thermal 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 nitrogen-carbon paste, is the presence of an inhomogeneous layer with clearly distinguished zones.
ER