Fig. 154.—Pouring Steel into Ingot Molds.
The ingots are heated in an ordinary heating furnace, and rolled or hammered into suitable bars, the sizes being fixed both by the amount of carbon contained in the ingots and by the dimensions required for the manufacture of special tools. Figure [151] shows the workmen in the act of rolling tool steel; in [Fig. 156] they are seen drawing octagon tool steel with the tilting hammer.
Fig. 155.—Steel Ingots.
Fig. 156.—Drawing Octagon Tool Steel with the Tilting Hammer.
Special alloys of crucible steel such as Mushet, blue chip, high speed, or other special brands are made by the same process, the secret of the difference lying entirely in the selection of the stock.
Fig. 157.—Cross Section of a Converter through the Trunnions.
