Canadian foundryman (1921) . ked eye that thetemperature of electrodes is far less andtherefore considerable saving of heat andpower does take place. CANADIAN FOUNDRYMAN A FAIR SIZED CASTING MADE OF STEEL MELTED IN AN ELECTRIC FURNACE The photograph illustrates a large steelcasting made for the Dobbin, made inthe Navy Foundry. The metal was meltedin a 3-ton GREAVES-ETCHELLS Elec-tric Furnace supplied by the ElectricFurnace Construction Co., 908 Chestnut 14,850 lbs. of material was charged intothe three-ton furnace, and the power con-sumpt:on for this exceptionally large
Canadian foundryman (1921) . ked eye that thetemperature of electrodes is far less andtherefore considerable saving of heat andpower does take place. CANADIAN FOUNDRYMAN A FAIR SIZED CASTING MADE OF STEEL MELTED IN AN ELECTRIC FURNACE The photograph illustrates a large steelcasting made for the Dobbin, made inthe Navy Foundry. The metal was meltedin a 3-ton GREAVES-ETCHELLS Elec-tric Furnace supplied by the ElectricFurnace Construction Co., 908 Chestnut 14,850 lbs. of material was charged intothe three-ton furnace, and the power con-sumpt:on for this exceptionally large heatwas only 801 KWH per ton. The engineer-ing officer reported that the casting was ofvery fine quality and showed the followingchemical analysis: Carbon 38 Manganese 89 Phosphorus 008 Sulphur 002 Silicon 33 Nickel 69 The full pattern was received from thepattern shop. The drag side of the moldwas produced by what is known as beddingin in the foundry floor, the cope side of thecasting being rammed up in a flask. Volume XII. NOTE THE CASTING COMPARED IN SIZETO THE MAN. After the pattern was drawn from themold, the cope and drag were dressed and thecope set upon iron blocks about eight (8)inches above the drag. The space betweenthe iron blocks was filled with brick in orderto retain the heat within the mold. The drying of the mold was performed byusing a low pressure oil burner located at oneend of the mold, two (2) days were requiredfor drying the mold. Physical tests obtained from test speci-mens cast on this casting were: Yield Tensile Elonga- Point Strength tion. Lbs. Lbs. .. 58,000 89,500 25% Specimen No. 2 .. 55,250 89,000 28% The electric furnace in the PhiladelphiaNavy Yard has been in operation for abouta year, but it is believed that this chargeconstitutes a record for this class of castingand shows the great adaptability of theelectric furnace when properly operated. IMPORTANT NEW DEVELOPMENT INELECTRICALLY HEATED ANNEAL-ING FURNACES The Electric Furnace Construction
Size: 1744px × 1433px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectfoundri, bookyear1921
