Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
Volume 21, Issue 12
Displaying 1-7 of 7 articles from this issue
  • Takeshi Yamaoka
    1935 Volume 21 Issue 12 Pages 957-979
    Published: December 25, 1935
    Released on J-STAGE: July 09, 2009
    JOURNAL FREE ACCESS
    The Kukioka No. 2 blast furnace at Yawata has a production of 700 tons of basic pig iron per day. It was constructed in October 1933
    The main dimensions of this furnace are as following; total height 24m., bosh diameter 7·4m., hearth diameter 6·7m., bosh angle 83°31′, bosh height 3·1m., total inner volume 837m3. The shaft is entirely surrounded with a steel plate shell.
    For the handling of the raw materials, tracks, ore bridge transporters, belt conveyors, transfer cars, larry cars and the skip filling type of hoisting device have been provided.
    The blower is a single tandem double acting four cycle gas blowing engine which is rated at 4, 800H.P. and delivers 1, 900m3 of air per minute. In order to clean the blast furnace gas, the Cottrell electrical precipitators have been adopted.
    The cleaned gas is used for hot stoves, coke ovens, gas boilers, gas engine blowers, soaking pits and other heating furnaces.
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  • Tetsuo Shimamura
    1935 Volume 21 Issue 12 Pages 980-992
    Published: December 25, 1935
    Released on J-STAGE: July 09, 2009
    JOURNAL FREE ACCESS
    Blooming mill plant is arranged between the steel making plant & Rolling mill plant. It is most important the process of manufacture from ingot to finishing Rolling product to be carried smoothly, just as water flor from the height to the low. For this purpese, the Blooming mill practice includes many important considerable points.
    On the point of vien, the arthor observed from the point of time study of Soaking pit practices & Blooming mill practices which have reference to the efficiency of the Blooming mill plant exceedingly.Explained the character of these working processes, and pointed out the many important conditions for favourable working relation between the steel making furnaces & Soaking pits or blooming mills and finishing Rolling mills.
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  • Takejiro Murakami, Atsuyoshi Hatta
    1935 Volume 21 Issue 12 Pages 993-997
    Published: December 25, 1935
    Released on J-STAGE: July 09, 2009
    JOURNAL FREE ACCESS
    In microstructure of the high speed steel quenched from a high temperature such as 1, 300°C, the troostitic structure is often observable in its decarburized portion. In order to elucidate theformation of the structure, a sectional diagram of constant 18% W and 4% Cr with varying carbon content was constructed by means of thermal analysis, differential dilatometric measurement and microscopic investigation. From the diagram obtained the change of microstructure of the high speed steels with different carbon content cooled from the melt was made clear. The troostitic structure also appears in the low carbon high speed steel cooled from the melt owing to the occurrence of a eutectoid reaction, γ→α+η, in a range of temperature below 1340° (aperitecto-eutectic point). The formation of the similar troostitic structure observable in decarburized portion of quenched high speed steel is, therefore, attributed to the same reaction taking place during rapid cooling.
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  • 1935 Volume 21 Issue 12 Pages 998-1012
    Published: December 25, 1935
    Released on J-STAGE: July 09, 2009
    JOURNAL FREE ACCESS
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  • 1935 Volume 21 Issue 12 Pages 1013-1020
    Published: December 25, 1935
    Released on J-STAGE: July 09, 2009
    JOURNAL FREE ACCESS
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  • 1935 Volume 21 Issue 12 Pages 1021-1022
    Published: December 25, 1935
    Released on J-STAGE: July 09, 2009
    JOURNAL FREE ACCESS
    Download PDF (270K)
  • 1935 Volume 21 Issue 12 Pages 1026-1048
    Published: December 25, 1935
    Released on J-STAGE: July 09, 2009
    JOURNAL FREE ACCESS
    Download PDF (1797K)
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