Advances and directions of ion nitriding/carburizing

Conference · Fri Sep 01 04:00:00 EDT 1989

OSTI ID:7268793

Spalvins, T

Ion nitriding and carburizing are plasma activated thermodynamic processes for the production of case hardened surface layers not only for ferrous materials, but also for an increasing number of nonferrous metals. When the treatment variables are properly controlled, the use of nitrogenous or carbonaceous glow discharge medium offers great flexibility in tailoring surface/near-surface properties independently of the bulk properties. The ion nitriding process has reached a high level of maturity and has gained wide industrial acceptance, while the more recently introduced ion carburizing process is rapidly gaining industrial acceptance. The current status of plasma mass transfer mechanisms into the surface regarding the formation of compound and diffusion layers in ion nitriding and carbon build-up ion carburizing is reviewed. In addition, the recent developments in design and construction of advanced equipment for obtaining optimized and controlled case/core properties is summarized. Also, new developments and trends such as duplex plasma treatments and alternatives to dc diode nitriding are highlighted.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 7268793
• Report Number(s): N-90-11902; NASA-TM--102398; E--5148; NAS--1.15:102398; CONF-8909302--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
BEAMS
CARBURIZATION
CHEMICAL REACTIONS
DEPOSITION
DOCUMENT TYPES
ELECTRIC DISCHARGES
GLOW DISCHARGES
HARDENING
ION BEAMS
MASS TRANSFER
NITRIDATION
PLASMA ARC SPRAYING
REVIEWS
SPRAY COATING
SURFACE COATING
SURFACE HARDENING
SURFACE TREATMENTS
THERMODYNAMICS