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Steel MakingTempering Round DiesA number of circular dies of carbon tool steel for use in too... Robert Mushet Robert (Forester) Mushet (1811-1891), born in the Forest of D... Machineability Reheating for machine ability was done at 100 deg. less than ... Leeds And Northrup Optical Pyrometer The principles of this very popular method of measuring tempe... The Effect The heating at 1,600 deg.F. gives the first heat treatment w... Carbon Tool Steel Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham... Steel For Chisels And Punches The highest grades of carbon or tempering steels are to be re... Annealing Of High-speed Steel For annealing high-speed steel, some makers recommend using g... Heat Treatment Of Punches And Dies Shears Taps Etc HEATING.--The degree to which tools of the above classes shou... The Leeds And Northrup Potentiometer System The potentiometer pyrometer system is both flexible and subst... Take Time For Hardening Uneven heating and poor quenching has caused loss of many ve... S A E Heat Treatments The Society of Automotive Engineers have adopted certain heat... Protective Screens For Furnaces Workmen needlessly exposed to the flames, heat and glare from... Carburizing Material The simplest carburizing substance is charcoal. It is also th... Alloying Elements Commercial steels of even the simplest types are therefore p... Hints For Tool Steel Users Do not hesitate to ask for information from the maker as to t... High-chromium Or Rust-proof Steel High-chromium, or what is called stainless steel containing f... Heat Treatment Of Steel Heat treatment consists in heating and cooling metal at defin... An Automatic Temperature Control Pyrometer Automatic temperature control instruments are similar to the ... High Speed Steel For centuries the secret art of making tool steel was handed ... |
Heat-treating DepartmentCategory: HEAT TREATMENT OF STEEL The heat-treating department occupies an L-shaped building. The design is very practical, with the furnace and the floor on the same level so that there is no lifting of heavy pots. Fuel oil is used in all the furnaces and gives highly satisfactory results. The consumption of fuel oil is about 2 gal. per hour per furnace. The work is packed in the pots in a room at the entrance to the heat-treatment building. Before packing, each gear is stamped with a number which is a key to the records of the analysis and complete heat treatment of that particular gear. Should a question at any time arise regarding the treatment of a certain gear, all the necessary information is available if the number on the gear is legible. For instance, date of treatment, furnace, carburizing material, position of the pot in the furnace, position of gear in pot, temperature of furnace and duration of treatment are all tabulated and filed for reference. After marking, all holes and parts which are to remain uncarburized are plugged or luted with a mixture of kaolin and Mellville gravel clay, and the gear is packed in the carburizing material. Bohnite, a commercial carburizing compound is used exclusively at this plant. This does excellent work and is economical. Broadly speaking, the economy of a carburizing compound depends on its lightness. The space not occupied by work must be filled with compound; therefore) other things being equal, a compound weighing 25 lb. would be worth more than twice as much as one weighing 60 lb. per cubic foot. It has been claimed that certain compounds can be used over and over again, but this is only true in a limited way, if good work is required. There is, of course, some carbon in the compound after the first use, but for first-class work, new compound must be used each time. Next: The Packing Department Previous: Annealing Method
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