The book Steel Thermal Treatment was written by author John W Urquhart Here you can read free online of Steel Thermal Treatment book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Steel Thermal Treatment a good or bad book?
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In one hour 9 1 B C. S. I. Co. LT?. FIG 37. Sections showing positions for thermo-couples in furnace* THE FURNACE . 115 and a half, after which an enormous output of work can be drawn from it in a day). The full consumption of coal gas is 700 cubic feet per hour ; producer gas, 2, 800 cubic feet. Air required at a pressure of 1 Ib. Per sq. In. , 5, 500 C. F. Per hour. Concerning Muffles. A muffle is a case or box of suit- able shape and material enclosing the steel to be treated, the whole bein...g placed within the furnace. Its real function is to isolate the steel from any contact with the products of combustion other than the pure heat. An example of a fairly effective muffle would consist of a crucible having a close-fitting cover, and surrounded by the heat. The interior of the muffle is supposed to be free of all gases of combustion and proof against the intrusion of oxidizing air, and it is just here that most muffles fail dismally. An ordinary muffle, as furnished with a gas furnace, consists of a D -shaped vessel of fireclay, with an open end coinciding with the door of the furnace.
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