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Steel MakingQuenching The WorkIn some operations case-hardened work is quenched from the bo... Carbon In Tool Steel Carbon tool steel, or tool steel as it is commonly called, us... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... The Forging Of Steel So much depends upon the forging of steel that this operation... Carbon Tool Steel Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham... Carbon-steel Forgings Low-stressed, carbon-steel forgings include such parts as car... Affinity Of Nickel Steel For Carbon The carbon- and nickel-steel gears are carburized separately... Introduction Of Carbon The matter to which these notes are primarily directed is the... Chrome-nickel Steel Forging heat of chrome-nickel steel depends very largely on ... High Speed Steel For centuries the secret art of making tool steel was handed ... Correction For Cold-junction Errors The voltage generated by a thermo-couple of an electric pyrom... Furnace Data In order to give definite information concerning furnaces, fu... Surface Carburizing Carburizing, commonly called case-hardening, is the art of pr... Heat-treating Department The heat-treating department occupies an L-shaped building. ... Gas Consumption For Carburizing Although the advantages offered by the gas-fired furnace for ... Silicon SILICON is a very widespread element (symbol Si), being an es... Non-shrinking Oil-hardening Steels Certain steels have a very low rate of expansion and contract... The Pyrometer And Its Use In the heat treatment of steel, it has become absolutely nece... Annealing Of Rifle Components At Springfield Armory In general, all forgings of the components of the arms manufa... Bessemer Process The bessemer process consists of charging molten pig iron int... |
Carburizing By GasCategory: CASE-HARDENING OR SURFACE-CARBURIZING The process of carburizing by gas, briefly mentioned on page 88, consists of having a slowly revolving, properly heated, cylindrical retort into which illuminating gas (a mixture of various hydrocarbons) is continuously injected under pressure. The spent gases are vented to insure the greatest speed in carbonizing. The work is constantly and uniformly exposed to a clean carbonizing atmosphere instead of partially spent carbonaceous solids which may give off very complex compounds of phosphorus, sulphur, carbon and nitrogen. Originally this process was thought to require a gas generator but it has been discovered that city gas works all right. The gas consists of vapors derived from petroleum or bituminous coal. Sometimes the gas supply is diluted by air, to reduce the speed of carburization and increase the depth. Next: Preventing Carburizing By Copper-plating Previous: Case-hardening Treatments For Various Steels
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