Factory and industrial management . ABOVE, STRAIGHT-LINE CUTTliNG OF 50-MILLIMEIKE PLAih.^. IlKLuW , .^LOTTIxNGARMOR PLATE TO A DEPTH OF 6 OR 7 CENTIMETRES. was then driven out with a punch. The maximum thickness whichhas yet been cut is 210 milHmetres ( inches) in armor plate,but 300 milHmetres has been reached in round shafting. 556 THE ENGINEERING ABOVE, CUTTING OFF A MAIN SHAFT. BELOW, CUTTING A BEARING LENGTHWISE. It has seemed of interest to examine the influence of this oxygencutting upon mechanical properties of the metal. Naturally, therewas fear that a certain zone of
Factory and industrial management . ABOVE, STRAIGHT-LINE CUTTliNG OF 50-MILLIMEIKE PLAih.^. IlKLuW , .^LOTTIxNGARMOR PLATE TO A DEPTH OF 6 OR 7 CENTIMETRES. was then driven out with a punch. The maximum thickness whichhas yet been cut is 210 milHmetres ( inches) in armor plate,but 300 milHmetres has been reached in round shafting. 556 THE ENGINEERING ABOVE, CUTTING OFF A MAIN SHAFT. BELOW, CUTTING A BEARING LENGTHWISE. It has seemed of interest to examine the influence of this oxygencutting upon mechanical properties of the metal. Naturally, therewas fear that a certain zone of metal would be superheated and thatit might even be oxidized to some depth. To determine these points i METAL CUTTING AND WELDING BY FUSION. 557 the double oxy-hydrogen and oxygen blow-pipe was used to cut aplate 15 millimetres thick, 500 millimetres long, and 250 millimetreswide. The practical tests were threefold; i.—Micrography demon-strated that the material was a normal mild steel of about percent carbon. The examination of a metal section showed that therewas no decarburization even on the extreme edge, and that at a veryslight depth the pearlite showed the somewhat coarse structure ofslightly overheated metal. Everywhere else the structure was strict-ly normal. 2.—Shock tests upon test pieces 10 by 10 by 60 millimetres notchedto a depth of 2
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
