Steel MakingQuenching Tool SteelTo secure proper hardness, the cooling of quenching of steel ... Forging High-speed Steel Heat very slowly and carefully to from 1,800 to 2,000 deg.F.... Restoring Overheated Steel The effect of heat treatment on overheated steel is shown gra... Manganese MANGANESE is a metal much like iron. Its chemical symbol is M... Mushet And Bessemer That Mushet was "used" by Ebbw Vale against Bessemer is, perh... Refining The Grain This is remedied by reheating the piece to a temperature slig... Quenching It is considered good practice to quench alloy steels from th... Liberty Motor Connecting Rods The requirements for materials for the Liberty motor connecti... Application Of Liberty Engine Materials To The Automotive Industry The success of the Liberty engine program was an engineer... Calibration Of Pyrometer With Common Salt An easy and convenient method for standardization and one whi... Leeds And Northrup Optical Pyrometer The principles of this very popular method of measuring tempe... Bessemer Process The bessemer process consists of charging molten pig iron int... Hardening High-speed Steels We will now take up the matter of hardening high-speed steels... Furnace Data In order to give definite information concerning furnaces, fu... Composition Of Transmission-gear Steel If the nickel content of this steel is eliminated, and the pe... Nickel-chromium A combination of the characteristics of nickel and the charac... Annealing ANNEALING can be done by heating to temperatures ranging from... Impact Tests Impact tests are of considerable importance as an indication ... Affinity Of Nickel Steel For Carbon The carbon- and nickel-steel gears are carburized separately... Non-shrinking Oil-hardening Steels Certain steels have a very low rate of expansion and contract... |
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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