Steel MakingThe Effect Of Tempering On Water-quenched GagesThe following information has been supplied by Automatic and ... Annealing Of Rifle Components At Springfield Armory In general, all forgings of the components of the arms manufa... Using Illuminating Gas The choice of a carburizing furnace depends greatly on the fa... The Leeds And Northrup Potentiometer System The potentiometer pyrometer system is both flexible and subst... Refining The Grain This is remedied by reheating the piece to a temperature slig... William Kelly's Air-boiling Process An account of Bessemer's address to the British Association w... Air-hardening Steels These steels are recommended for boring, turning and planing... Rate Of Cooling At the option of the manufacturer, the above treatment of gea... Annealing Method Forgings which are too hard to machine are put in pots with ... Short Method Of Treatment In the new method, the packed pots are run into the case-har... Ebbw Vale And The Bessemer Process After his British Association address in August 1856, Besseme... Gears The material used for all gears on the Liberty engine was sel... 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... Composition And Properties Of Steel It is a remarkable fact that one can look through a dozen tex... Correction By Zero Adjustment Many pyrometers are supplied with a zero adjuster, by means ... The Quenching Tank The quenching tank is an important feature of apparatus in c... Steel Can Be Worked Cold As noted above, steel can be worked cold, as in the case of ... Carburizing By Gas The process of carburizing by gas, briefly mentioned on page ... Heat Treatment Of Punches And Dies Shears Taps Etc HEATING.--The degree to which tools of the above classes shou... |
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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