Accession Number : AD0709582

Title :   IONITRIFICATION KINETICS OF TWO COMMERICAL STEELS.

Descriptive Note : Technical rept.,

Corporate Author : ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIRECTORATE

Personal Author(s) : Soccorsy,William D. ; Ebihara,William T.

Report Date : JUN 1970

Pagination or Media Count : 21

Abstract : The penetration of nitrogen into two commercial steels (Nitralloy 135M and AISI 4140) was studied under glow-discharge conditions. Comparisons are made with those steels conventionally nitrided. With the use of identical conditions of temperature and time, the depth of penetration was observed to be consistently higher for ion-nitrided samples than for gas-nitrided samples. Further, the thickness of the white layer (Fe4N) is substantially less for ion-nitrided specimens than for those specimens commercially nitrided. The dual role of hydrogen ions in cleansing the work surface and in inhibiting the growth of the surface-layer nitrides was established. (Author)

Descriptors :   (*CASE HARDENING, STEEL), NITROGEN, PENETRATION, DIFFUSION, REACTION KINETICS

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE