The Iron and steel magazine . the latter case, the object is to change the structure of thesteel at the same time with its shape. Among the numerousdevices for compressing steel in molds the following three meth-ods may be mentioned: i. Pressing from the Top. — While there is no difficulty inthis method, if the whole charge goes into one mold, the machin-ery will be considerably complicated if several ingots of smallersizes have to be cast. These ingots will have to stand on trucksand move in procession under the press; or several presses will 312 The Iron and Steel Magazine have to he arrange
The Iron and steel magazine . the latter case, the object is to change the structure of thesteel at the same time with its shape. Among the numerousdevices for compressing steel in molds the following three meth-ods may be mentioned: i. Pressing from the Top. — While there is no difficulty inthis method, if the whole charge goes into one mold, the machin-ery will be considerably complicated if several ingots of smallersizes have to be cast. These ingots will have to stand on trucksand move in procession under the press; or several presses will 312 The Iron and Steel Magazine have to he arranged with additional complications. It is almostimpossible to time the casting and the pressing in harmony. Ifthe latter is done too early the cavities will continue to form inthe interior of the steel. If too late, the pipe is already formedand oxidized, and, therefore, will only be squeezed together, butnot eliminated. Any compression from the end of an ingot isattended with the danger of tearing the interior loose from the.
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Keywords: ., bookcentury1800, bookdecade1890, bookidironsteel, booksubjectiron
