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Steel MakingUses Of The Various Tempers Of Carbon Tool SteelDIE TEMPER.--No. 3: All kinds of dies for deep stamping, pres... Testing And Inspection Of Heat Treatment The hard parts of the gear must be so hard that a new mill f... Knowing What Takes Place How are we to know if we have given a piece of steel the ver... Annealing Of Rifle Components At Springfield Armory In general, all forgings of the components of the arms manufa... Hardening High-speed Steels We will now take up the matter of hardening high-speed steels... Pyrometers Armor plate makers sometimes use the copper ball or Siemens' ... Pyrometers For Molten Metal Pyrometers for molten metal are connected to portable thermoc... Hardening The forgings can be hardened by cooling in still air or quen... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Nickel-chromium A combination of the characteristics of nickel and the charac... Phosphorus Phosphorus is one of the impurities in steel, and it has been... Annealing To Relieve Internal Stresses Work quenched from a high temperature and not afterward tempe... Hardness Testing The word hardness is used to express various properties of me... Detrimental Elements Sulphur and phosphorus are two elements known to be detrimen... Steel Before The 1850's In spite of a rapid increase in the use of machines and the ... Care In Annealing Not only will benefits in machining be found by careful anne... Suggestions For Handling High-speed Steels The following suggestions for handling high-speed steels are ... Carburizing Low-carbon Sleeves Low-carbon sleeves are carburized and pushed on malleable-ir... Preparing Parts For Local Case-hardening At the works of the Dayton Engineering Laboratories Company, ... Sulphur SULPHUR is another element (symbol S) which is always found i... |
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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