This paper presents a design method of the forming groove-to-separating groove rolling sequence used in slit rolling process. Based on the equivalent rectangle approximation, we have designed the forming groove which produces a peanut-shaped cross section via rolling from workpiece with an inlet (incoming) square cross section. The separating groove is designed by lowering its width and height in the ratio of 1:3 for the given reduction ratio. With the forming groove and separating groove designed by the proposed design method, we have performed a pilot rolling test at high temperature (around 1000 o C) using low carbon (0.1%C) steel and have also carried out finite element analysis to examine the expansibility of the proposed design method. The Results reveal that if the ratio of the roll diameter over the side length of a square is in the range of 4.0 ~ 8.0, the design method proposed in this study can be systematically applied to design the forming groove-to-separating groove without relying on in-house databases and/or on-site experience.

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1997 luminescence, fluorescence luminescence, fluorescence (solids and liquids) D 6540 -005Synthesis and Low-Voltage Characteristics of CaTiO3:Pr Luminescent Powders.-The optical and material properties of the title phosphors, prepared by conventional combustion methods are studied with regard to a possible application for field emitter displays. Maximal photoluminescence is obtained by optimization of preparation conditions. CaTiO3:Pr of perovskite structure, deposited electrophoretically onto indium-tin oxide glass and excited by field emitter arrays yields lumen intensity up to 10 cd/m2 with chromaticity of X = 0.625 and Y = 0.297. -(CHO, S. H.; YOO, J. S.; LEE, J. D.; J.

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

A Facile Preparation of α-Amino-β-methoxydiazines Through the Lithiation Followed by Amination.-Amination of diazines by ortho-metalation is a new and very effective mild method for the introduction of amino groups into diazine heterocycles. -(LEE, J. I.; CHO, S. H.; Bull.