from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. impregnation or reaction with carbon, especially in the manufacture of steel
from the GNU version of the Collaborative International Dictionary of English
- n. The act, process, or result of carburizing.
from The Century Dictionary and Cyclopedia
- n. The process of adding carbon, especially to iron; any process which has as its chief result the increasing of the amount of carbon present in a metal.
Sorry, no etymologies found.
As to the carburization process, the metallic clean workpieces are inserted in carbon-containing powder (charcoal or leather coal) or they are blown with carbon-containing gases and annealed without air for 4 to 10 hours at temperatures between 880°C and 920°C.
The penetration depth of the carbon is dependent on the application time during carburization.
Until the temperature of the muffle reaches about 1,300°F. carburization does not take place to any useful extent, and consequently it is advisable to avoid the use of any compound from which the carburizing gases are liberated much before that temperature is reached.
The carburization then goes on for several hours before the furnace is cooled below the effective carburizing range, securing an ideal diffusion of carbon between the case and the core of the steel being carburized.
The temperature at which carburization is accomplished is a very important factor.
-- The carbon - and nickel-steel gears are carburized separately owing to the difference in time necessary for their carburization.
Many more elaborate explanations may be given of the actions and reactions taking place, but the above is a satisfactory guide to indicate that it is not the actual compound which causes carburization, but the gases released from the compound.
Sometimes the gas supply is diluted by air, to reduce the speed of carburization and increase the depth.
In order to produce quick and intense carburization the iron should preferably be above its upper critical temperature or 1,600°F., -- therefore the carbon absorbed immediately goes into austenite, or solid solution.
Formerly, these sleeves were given two treatments after carburization in order to refine the case and the core, and then sent to the grinding department, where they were ground to a push fit for the hubs.
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