Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
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Volume 36, Issue 10
Displaying 1-9 of 9 articles from this issue
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  • STUDIES ON THE ASHES OF COKING COALS, PRODUCER COALS AND OTHER COALS FOR IRON AND STEEL PRODUCTION
    Shigeichi Sasaki
    1950 Volume 36 Issue 10 Pages 463-472
    Published: October 25, 1950
    Released on J-STAGE: July 09, 2009
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_463
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    The author has studied on the kinds, chemical compositions and the refractoriness of ashes of coking coals, producer coals and other coals. And the relations between ash quantities of coals and fixed carbon, volatile matter, moisture and calorie values of them, and the refractoriness of ash were also investigated.
    The total number of samples presented to the test were about thirty-five, which were mined at various districts in Japan, Saghalien, North-China, Manchuria and Canada. Of these samples, the greater part were those of Japan and Saghalien coals, besides four kinds of North-China coals, two kinds of Manchuria coals and one kind of Canada coal were presented to the test.
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  • ON THE NOZZLE AND STOPPER FOR STEEL MAKING (I)
    Seiji Nishigori, Shohei Niwa
    1950 Volume 36 Issue 10 Pages 472-478
    Published: October 25, 1950
    Released on J-STAGE: July 09, 2009
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_472
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    We compared the superiority of the three different types of stopper and nozzle of the same quality after using them in practice and found the proper values of porosity, refractoriness and load softening point among various safety range conditions of them.
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  • THE STUDY ON THE OXIDATION EQUILIBRIUM OF FERROUS SULPHIDE AND MANGANESE SULPHIDE BY CARBON DIOXIDE.
    Tatsuji Uno, Kenjiro Kanbara, Etsuro Homma
    1950 Volume 36 Issue 10 Pages 479-485
    Published: October 25, 1950
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_479
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    We studied the oxidation equilibrium of the reactions
    3FeS+10CO2 Fe3O4+3SO2+10CO
    MnS+3CO2 MnO+SO2+3CO
    at 690-890°C and 600-1000°C respectively, by following method.
    Obtained the following equations for each reaction.
    LogKFeS=Logp10CO·p3SO2/p10CO2=-52, 669·7/T+22·43
    LogKMnS=Logp3CO·pSO2/p3CO2=-18, 290·6/T+8·28
    From this result calculated the equilibrium constant of the following reactions
    FeS+3CO2 FeO+SO2+3CO
    FeS+2CO2 Fe+SO2+2CO
    and obtained the following equations
    LogKFeO=Logp3CO·pSO2/p3CO2=-18, 112·6/T+8·14
    LogKFe=Logpp2CO·pSO2/pp2CO2=-17, 209.8/T+7.04
    From these results obtained the equilibrium diagram between pCO/pCO2 and pSO2 over ferrous sulphide.
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  • STUDIES ON THE FLAKE-LIKE DEFECTS IN STEEL (IX)
    Condition to impede the flake formation
    Yoshio Shimokawa
    1950 Volume 36 Issue 10 Pages 486-494
    Published: October 25, 1950
    Released on J-STAGE: July 09, 2009
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_486
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    In former experiments, the condition to form easily the flake-like defects has been studied. But in this experiments the condition to impede the flake formation is studied. The results are summerized as follows:
    (1) Notch engraved on the side of tensile and bending test piece impede the flake formation.
    (2) On the fracture of pickled Izod and Charpy test pieces, no flake-like or flsh-eye-like defects are appeared.
    (3) On the fracture of pickled tensile test pieces, no defects are also appeared, if it be broken by shockness. But if the same test piece be broken more slowly (for example, by the Amsler testing machine), the flake-like defects appear clearly. From this experiment the flake formation of the pickled test piece is affected remarkably by its breaking speed.
    (4) This result suggest us that the action of outer stress is to assist the concentration of supersaturated hydrogen at the supermicroscopic holes in the mosaic boundary or similar substructure or others, and both, inner stress of concentrated molecular hydrogen and outer stress are the essential factors for flake formation.
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  • STUDY ON HIGH TEMPERATURE OXIDATION OF IRON AND ITS ALLOYS (VIII)
    On the Protection of the Steel against Heating by Aluminizing
    Masataka Sugiyama
    1950 Volume 36 Issue 10 Pages 495-499
    Published: October 25, 1950
    Released on J-STAGE: July 09, 2009
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_495
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    The studies on the high temperature oxidation resistance of the aluminium sprayed steel were made. The surface of heat reacted specimens of aluminized steel consisted of two layers FeAl3 and Fe-Al solid solution, and the latter became columnar crystal structure if heated on the temperature between Ac3 and Ar4. Weight changing curves of the specimens by heating on 800, 900 and 1000°C after diffusion treatment at 1000°C for 15min., were shown on Fig 5, 6 and 7. The relations between the life which means the heating time until the weight decrease to 50%, and the thickness of the aluminium sprayed coating and heating temperature were shown on Fig 8, Fig 9 shows the quenching boxes of steel needles which were used for three monthes. at 900°C.
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  • [title in Japanese]
    [in Japanese]
    1950 Volume 36 Issue 10 Pages 500-509
    Published: October 25, 1950
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_500
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  • REPORT OF STEEL MAKING DIVISION, INVESTIGATION COMMITTEE OF THE IRON AND STEEL INSTITUTE OF JAPAN (I)
    Haruju Kikkava
    1950 Volume 36 Issue 10 Pages 510-513
    Published: October 25, 1950
    Released on J-STAGE: July 09, 2009
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_510
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    The committee adopted the following subjects to study: -(1) Gas producer operations, (2) Rational use of fuel oil, (3) Substitute materials for furnace bed, (4) Refractory bricks, (5) High quality high carbon ((6) low carbon) steel making by basic open hearth process, (7) Semi-killed steel, (8) Ordinary steel from electric arc furnace, (9) Use of oxygen in open hearths, (10) Design of open hearth construction. Meetings were held twelve times since Aug. 1948, once at Yawata, twice at Amagasaki, the remainder at Tokyo. All but one subjects have not yet come to conclusions. Investigations of the use of oxygen in open hearths were carried out in co-operation with the joint experimentation of eight leading steelmaking companies, a complete report of which was published in Aug. 1950. As partial conclusions of the study of design of open hearth furnaces, standard dimensions for oil firing open hearths of 30, 40, 50, 60, 80 and 100t capacity, and those for producer gas firing open hearths of 40, 50, 60 and 80t capacity were recently determined, which will be soon published.
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  • [title in Japanese]
    1950 Volume 36 Issue 10 Pages 514-518
    Published: October 25, 1950
    Released on J-STAGE: July 09, 2009
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_514
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  • [title in Japanese]
    1950 Volume 36 Issue 10 Pages 519
    Published: October 25, 1950
    Released on J-STAGE: July 09, 2009
    DOIhttps://doi.org/10.2355/tetsutohagane1915.36.10_519
    JOURNAL FREE ACCESS
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