長尺軌條の壓延に就て

概要

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Because of the length of rails which was renewed from 10m to 20 or 25m in the Japanese Government Railways, the blooming and rail mills at the Yawata Steel Works had to be rebuilt (as shown in Fig. 1) in order to make such long rails. As to the rolling methods of rails, the following three methods are usually adopted ; i.e., the diagonal method, the cutting-in and flange-bending method and the slab-and-edging method, Of these methods, we approbated the slab-and-edging method in view of little wear of rolls and smooth working of mills. The rails are speedily treated by the roller straightening machine, after which they contract 1.05mm/min length owing to the variation of the cross-sectional area.
社団法人日本鉄鋼協会の論文
1938-09-25