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Steel MakingFurnace DataIn order to give definite information concerning furnaces, fu... Nickel Nickel may be considered as the toughest among the non-rare a... Blending The Compound Essentially, this consists of the sturdy, power-driven separa... Refining The Grain This is remedied by reheating the piece to a temperature slig... Chrome-nickel Steel Forging heat of chrome-nickel steel depends very largely on ... Classifications Of Steel Among makers and sellers, carbon tool-steels are classed by g... The Forging Of Steel So much depends upon the forging of steel that this operation... Ebbw Vale And The Bessemer Process After his British Association address in August 1856, Besseme... Tempering Round Dies A number of circular dies of carbon tool steel for use in too... Manganese Manganese adds considerably to the tensile strength of steel,... Composition Of Transmission-gear Steel If the nickel content of this steel is eliminated, and the pe... The Theory Of Tempering Steel that has been hardened is generally harder and more br... Properties Of Steel Steels are known by certain tests. Early tests were more or l... Quality And Structure The quality of high-speed steel is dependent to a very great ... Suggestions For Handling High-speed Steels The following suggestions for handling high-speed steels are ... Annealing In Bone Steel and cast iron may both be annealed in granulated bone. ... Instructions For Working High-speed Steel Owing to the wide variations in the composition of high-speed... Oil-hardening Steel Heat slowly and uniformly to 1,450 deg.F. and forge thorough... Cyanide Bath For Tool Steels All high-carbon tool steels are heated in a cyanide bath. Wi... Annealing Work With the exception of several of the higher types of alloy s... |
Separating The Work From The CompoundCategory: CASE-HARDENING OR SURFACE-CARBURIZING During the pulling of the heat, the pots are dumped upon a cast-iron screen which forms a table or apron for the furnace. Directly beneath this table is located one of the steel conveyor carts, shown in Fig. 43, which is provided with two wheels at the rear and a dolly clevis at the front, which allows it to be hauled away from beneath the furnace apron while filled with red-hot compound. A steel cover is provided for each box, and the material is allowed to cool without losing much of the evolved gases which are still being thrown off by the compound. As this compound comes from the carburizing pots it contains bits of fireclay which represent a part of the luting used for sealing, and there may be small parts of work or bits of fused material in it as well. After cooling, the compound is very dusty and disagreeable to handle, and, before it can be used again, must be sifted, cleaned and blended. Some time ago the writer was confronted with this proposition for one of the largest consumers of carburizing compound in the world, and the problem was handled in the following manner: The cooled compound was dumped from the cooling cars and sprinkled with a low-grade oil which served the dual purposes of settling the dust and adding a certain percentage of valuable hydrocarbon to the compound. In Fig. 44 is shown the machine that was designed to do the cleaning and blending. Next: Blending The Compound Previous: The Care Of Carburizing Compounds
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