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Kinetics of carburizing in a nitrogen-hydrogen atmosphere with addition of pure methane

Journal Article · · Met. Sci. Heat Treat. Met. (Engl. Transl.); (United States)
OSTI ID:5475308
; ;
Nitrogen-hydrogen containing atmospheres are more promising with addition of different gaseous hydrocarbons, whose carburizing activity promote a marked saving in natural gas. It was shown that the mass transfer coefficient during carburizing in H/sub 2/-CH/sub 4/-H/sub 2/O mixtures diluted with nitrogen decreases with an increase in carbon content in the foil. The specific flow of carbon into the metal depends to a considerable degree on carburizing temperature, methane content in the mixture, and carbon content in the steel. A reduction in carburizing intensity with an increase in carbon content in the steel may be connected with development of pyrocarbon nuclei and a reduction in the number of active centers of the foil surface.
Research Organization:
Central Institute of Power Systems and Ferrous Metallorgy
OSTI ID:
5475308
Journal Information:
Met. Sci. Heat Treat. Met. (Engl. Transl.); (United States), Journal Name: Met. Sci. Heat Treat. Met. (Engl. Transl.); (United States) Vol. 27; ISSN MHTRA
Country of Publication:
United States
Language:
English

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ACTIVATION ENERGY
ALKANES
ALLOYS
ARRHENIUS EQUATION
ATMOSPHERES
CARBON
CARBURIZATION
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CONTROLLED ATMOSPHERES
DIFFUSION
EFFICIENCY
ELEMENTS
ENERGY
ENERGY EFFICIENCY
EQUATIONS
FOILS
FURNACES
GAS FURNACES
HARDENING
HYDROCARBONS
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
MATERIALS TESTING
METHANE
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
QUANTITY RATIO
REACTION KINETICS
STEELS
SURFACE HARDENING
SURFACE TREATMENTS
TEMPERATURE DEPENDENCE
TESTING