Sliding behaviour of ion nitrided AISI 420 stainless steel

Abstract

This paper provides an analysis of the influence of thermal and surface treatments on sliding wear of AISI 420 stainless steel. The specimens were separated into three batches. One was left in the as-received condition for comparison purposes. The other two were subjected to austenitising, oil quenching and tempering at 673 K. One of them was also plasma nitrided under an atmosphere of 25%N2 and 75%H2, at a temperature of 673 K. All the specimens were tested under different normal loads and pure dry sliding conditions. The wear affected surface and subsurface were studied by means of scanning electron microscopy, and phase identification was determined with X-ray diffraction; changes in contact conditions during tests were analysed; initial and final surface roughness were measured. During the tests, surface temperature and friction coefficients were recorded.

Low-temperature plasma nitrocarburizing of the AISI 420 martensitic stainless steel: Microstructure and process kinetics

“…Among different surface modification processes, low-temperature plasma-assisted thermochemical treatments of martensitic stainless steels can be successfully employed to achieve this purpose. In this case, good results have been reported by applying plasma nitriding [2,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], carburizing [22][23][24], and also nitrocarburizing [6]. Likewise, very promising results were presented in refs.…”

A Study of Friction and Wear Behavior of Nitrided Layer on 2cr13 Steel in Vacuum

“…Tribological characteristics and wear mechanisms of the nitrided layer have been widely investigated in air conditions [4][5][6][7][8][9][10]. During the 1990s, Kato et al [4] showed that the wear rate of gas-nitrided BS970 and 905M39 steels under dry sliding in air increased with increasing sliding speed and/or normal load.…”

“…Over a wide range of sliding speed (0.2-5 m s -1 ) and applied load (2-200 N) in air, the gas-nitrided steel showed a transition from oxidative (mild) wear to metallic (severe) wear mechanism, which was characterized by plastic deformation and metal transfer. References [5][6][7][8] revealed the existence of subsurface cracks in the nitrided layer on steels after dry sliding, and emphasized that the oxidative and the delamination wear dominated the wear process in air. Corengia et al [8] confirmed the occurrence of plastic deformation in nitrided AISI 410 steel after rolling-sliding in air and that the plastic deformation depth increased with applied load from 490 to 1961 N. The plastic deformation occurred in the substrate below nitrided case rather than in the nitrided case.…”

Short Time Ion Nitriding of AISI 420 Martensitic Stainless Steel to Improve Wear and Corrosion Resistance

“…For these applications, plasma nitriding can be used to increase surface hardness and wear resistance and consequently improve their performance and lifespan [1][2][3][4] . Several studies about the wear behaviour of nitrided martensitic stainless steel have been carried out and many authors have reported that the plasma nitriding process allows the improvement of tribological properties 2,[5][6][7] . In this kind of steels, a nitrided layer with both a high nitrogen content zone and a diffusion zone is formed 5,7 .…”