The Heat Treatment of Tool Steel An Illustrated Description of the Physical Cha
The Heat Treatment of Tool Steel An Illustrated Description of the Physical Cha
Harry Brearley
The book The Heat Treatment of Tool Steel An Illustrated Description of the Physical Cha was written by author Harry Brearley Here you can read free online of The Heat Treatment of Tool Steel An Illustrated Description of the Physical Cha book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Heat Treatment of Tool Steel An Illustrated Description of the Physical Cha a good or bad book?
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A simpler form of furnace is illustrated in Fig. 51. The furnace body consists of a wrought-iron cylinder with brick lining. There is an intermediate air space to reduce FIG. 51. Very simple form of salt-bath furnace. radiation, and for the same reason a sheet of asbestos is sometimes laid on to the outer surface of the wrought iron. A single burner of the annular type rests on the bottom of the furnace body, and the pot containing the salt mixture is supported by lugs, or a perforated rim, whi...ch rests on the brick lining. The flame and hot gases, in passing between the outer surface of the pot and the inner surface of the brick lining, give up much of their heat to numerous studs projecting from all parts of the surface of the pot, and are HARDENING PLANT 93 eventually diverted on to the surface of the molten salt by means of the curved cover. In this way the pot is evenly heated to the extreme upper edge, and an accumula- tion of frozen salt becomes impossible. At the same time the products of combustion impinging on the surface of the salt, or lead as the case may be, minimizes the amount of atmospheric surface oxidization.
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