合金チルドロールの研究

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By the investigation of the characteristics of steel mill chilled rolls for the object of improving their properties, all the results of experiments tried until present on common cast irons are shown to be unsuitable for chilled rolls owing to the remarkable difference in their properties. So the author deviced a proper apparatus for this object to study this problem by reasonable method, and gained the following results. (1) Influences of fifteen elements, namely, C, Al, Si, P, Ti, Co, Ni, Cu, S, V, Cr, Mn, Mo, Sn, W, are investigated in very wide rangest upon the surface hardness and the depth of chill which are so important for all chilled rolls, and are found to be most effective to add nickel with a little amount of chrome to gain hard rolls among those elements. (2) In consequence of the above results, various effects of nickel and chrome, and also combind effects of both elements were again further studied respectively, not only on surface problems but also on many physical and mechanical properties of the inner grey part of the roll, and at last a very hard and strong alloy chilled roll was invented, whose chemical composition lies between Ni 3.3, Cr 1.2%-Ni 4.3, Cr 1.6% and has its surface hardness over 90 in scleroscope number, keeping always a constant chill depth equal to ordinary chilled rolls. (3) Furthermore a plenty of this kind of heavy rolls has been practically cast in our foundry since that time, and used as tin plate finishing rolls (weight of one roll is 3, 800kg) or thin sheet finishing rolls (weight of one roll is 5, 717kg) etc., for these several years gaining a splendid results beyond expectation.
社団法人日本鉄鋼協会の論文
1932-09-25

著者

谷口光平
鉄鋼短期大学

合金チルドロールの研究

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