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Steel MakingRate Of CoolingAt the option of the manufacturer, the above treatment of gea... Annealing Work With the exception of several of the higher types of alloy s... The Electric Process The fourth method of manufacturing steel is by the electric f... Application To The Automotive Industry The information given on the various parts of the Liberty eng... Take Time For Hardening Uneven heating and poor quenching has caused loss of many ve... Placing Of Pyrometers When installing a pyrometer, care should be taken that it re... Heavy Forging Practice In heavy forging practice where the metal is being worked at... Using Illuminating Gas The choice of a carburizing furnace depends greatly on the fa... Phosphorus Phosphorus is one of the impurities in steel, and it has been... Preparing Parts For Local Case-hardening At the works of the Dayton Engineering Laboratories Company, ... Open Hearth Process The open hearth furnace consists of a big brick room with a l... Chromium Chromium when alloyed with steel, has the characteristic func... Machineability Reheating for machine ability was done at 100 deg. less than ... Furnace Data In order to give definite information concerning furnaces, fu... The Quenching Tank The quenching tank is an important feature of apparatus in c... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Instructions For Working High-speed Steel Owing to the wide variations in the composition of high-speed... Carburizing By Gas The process of carburizing by gas, briefly mentioned on page ... Robert Mushet Robert (Forester) Mushet (1811-1891), born in the Forest of D... |
Annealing Of Rifle Components At Springfield ArmoryCategory: CASE-HARDENING OR SURFACE-CARBURIZING In general, all forgings of the components of the arms manufactured at the Armory and all forgings for other ordnance establishments are packed in charcoal, lime or suitable material and annealed before being transferred from the forge shop. Except in special cases, all annealing will be done in annealing pots of appropriate size. One fire end of a thermo-couple is inserted in the center of the annealing pot nearest the middle of the furnace and another in the furnace outside of but near the annealing pots. The temperatures used in annealing carbon steel components of the various classes used at the Armory vary from 800 deg.C. To 880 deg.C. or 1,475 to 1,615 deg.F. The fuel is shut off from the annealing furnace gradually as the temperature of the pot approaches the prescribed annealing temperature so as to prevent heating beyond that temperature. The forgings of the rifle barrel and the pistol barrel are exceptions to the above general rule. These forgings will be packed in lime and allowed to cool slowly from the residual heat after forging. Next: Surface Carburizing Previous: Annealing In Bone
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