RT Journal Article
SR Electronic
A1 Dobrocky, David
A1 Kusmic, David
T1 The Effect of Plasma Nitriding Process on the Change of Dynamic Parameters of Steel DIN 1654/4
JF Manufacturing Technology Journal
YR 2015
VO 15
IS 1
SP 14
OP 20
DO 10.21062/ujep/x.2015/a/1213-2489/MT/15/1/14
UL https://journalmt.com/artkey/mft-201501-0003.php
AB This article describes the effect of selected parameters of plasma nitriding on the change of dynamic parameters of steel DIN 1654/4. Plasma nitriding is currently used in a wide range of technical applications such as a final operation to improve the mechanical properties of components. This experimental investigation is devoted to the analysis of the influence of plasma nitriding on the notch toughness of structural steel DIN 1654/4 (CSN 41 2042.4). The test of the dynamic fracture behaviour of structural steel was carried out using by instrumental Charpy hammer on the plasma nitrided specimens with V and U notch, manufactured according to standard CSN ISO 148-1. The plasma nitriding was implemented at 500 (°C), process duration t = 10 and 20 (h) and variable gas mixture ratio of 24H2: 8N2 (l/h) and 8H2: 24N2 (l/h). The test results showed that nitrided steel has become more brittle. However, it was found that for different gas composition, the notch toughness has behaved quite diversely. The values of notch toughness of steel in case of gas ratio 8H2: 24N2 (l/h) were decreased but for gas ratio 24H2: 8N2 (l/h), with extension of time, the notch toughness was slightly increased.