高級高合金鋼の遊星圧延法について

概要

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It has been known that producing good quality hot strips with ductile micro structure of high grade high alloy steels having big single weight by hot rolling is very difficult.However on the base of the results obtained after a long years' study of hot rolling of high grade high alloy steels by single planetary mill, quite a few merits of the said mill can be effectively available in case of rolling various high alloy steels and also they, comparatively, can be rolled with ease.Even a high speed steel that can hardly be processed could also be hot rolled into an ductile hot strip by 400φ single planetary mill.In this case, the underwritten conditions are necessary:1. The workrolls are to be thick.2. To use an assembly of 8 piece planetary workroll.3. To hot roll a slab as thin as approx 70% of high carbon steel raw material into a strip.4. The ratio between "t" of plate thickness and "l'" of length of touching arc is to be more than 0.60Also a correct calculation method of "l'" is being introduced.
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