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Steel MakingCorrosionThis steel like any other steel when distorted by cold worki... Hardening High-speed Steel In forging use coke for fuel in the forge. Heat steel slowly ... Chrome-nickel Steel Forging heat of chrome-nickel steel depends very largely on ... Care In Annealing Not only will benefits in machining be found by careful anne... Annealing Of Rifle Components At Springfield Armory In general, all forgings of the components of the arms manufa... Take Time For Hardening Uneven heating and poor quenching has caused loss of many ve... Drop Forging Dies The kind of steel used in the die of course influences the he... Heavy Forging Practice In heavy forging practice where the metal is being worked at... Tungsten Tungsten, as an alloy in steel, has been known and used for a... Application To The Automotive Industry The information given on the various parts of the Liberty eng... Steel Worked In Austenitic State As a general rule steel should be worked when it is in the a... An Automatic Temperature Control Pyrometer Automatic temperature control instruments are similar to the ... Hardening Steel is hardened by quenching from above the upper critical.... Pyrometers For Molten Metal Pyrometers for molten metal are connected to portable thermoc... Temperatures To Use As soon as the temperature of the steel reaches 100 deg.C. (... Annealing Of High-speed Steel For annealing high-speed steel, some makers recommend using g... Oil-hardening Steel Heat slowly and uniformly to 1,450 deg.F. and forge thorough... Molybdenum Molybdenum steels have been made commercially for twenty-five... The Influence Of Size The size of the piece influences the physical properties obta... Annealing To Relieve Internal Stresses Work quenched from a high temperature and not afterward tempe... |
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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