Steel Science Portal

Tetsu-to-Hagané
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up

Grid List Abstracts

ONLINE ISSN: 1883-2954
PRINT ISSN: 0021-1575

Tetsu-to-Hagané Vol. 55 (1969), No. 12

  • 随想

    大谷 正康

    pp. 963-964

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

  • Transfer of Silicon to Molten Iron by the Medium of SiO Gas

    Tsuzuru NUIBE, Nobuo SANO, Yukio MATSUSHITA

    pp. 965-980

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    Abstract

    Chemical transport reactiOn of silicon from a sintered silicon carbide disc to Fe-C melt by SiO gas medium at 1450 to 1600°C was investigated in the view of kinetics.
    The results were interpreted by a mass transport equatiOn derived from the mixed control theory, topochemical reactiOn theory and unreacted core model. Numerical values of all coefficients included in the equatiOn were experimentally determined as follows._??_
    The most important factor for the silicon transfer by gaseous medium was found to be an activity of carbon in Fe-C melt. Therefore, the possibility of gaseous silicon absorptiOn into freely falling liquid'iron droplets in a blast furnace was concluded to depend upon the carbon content in droplets.
    The derived general equatiOn is expected to be applicable to other conditiOns than experimentally undertaken.

  • On Electro-slag Remelting of Steels

    Kiichi NARITA, Toshio ONOYE, Katsutoshi IWAMOTO

    pp. 981-1006

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    Abstract

    Electro-slag remelting is one of the most suitable processes for the production of special steels.
    In order to clarify the refining reactions of the process, carbon steels with further addition of various alloying elements and some commercial steels were remelted in a small scale furnace.
    Further, to confirm the effect of electro-slag remelting on the mechanical properties of steels and to examine the industrialization of the process, stainless steels, low alloy steels, high speed steels and bearing steels were remelted in a large scale furnace. The results are as follows:
    (1) Under same proper conditions, the remelted ingot shows a good skin condition and has homogeneous structures.
    Moreover, the segregation, the size and amounts of the non-metallic inclusions are reduccd.
    (2) Using CaF2-based slags, even in the case of the electrode of 0 01% S, the desulphurization reaction is observed.
    (3) In the mechanical properties of the electro-slag remelted steels, the ductility in the transverse direction increases noticeably, namely, the anisotropy reduces. For the high speed steel and the bearing steel, improvement of tool life and bearing life are respectively expected.
    (4) The use of cast electrode and returned slag in the electro-slag remelting causes the cost down of the process.

  • Application of Oxygen Concentration Cells to Kinetic Study of Heterogeneous Reactions at Elevated Temperature

    Kazuhiro GOTO, Minoru SASABE, Masahiro KAWAKAMI, Mayumi SOMENO, Yukio MATSUSHITA

    pp. 1007-1029

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    Abstract

    An oxygen concentration cell with zirconia and lime electrolyte has two characteristics in its performance at elevated temperature; First, the cell shows good reversibility against the change of oxygen pressure and temperature at the interface of the solid electrolyte and the electronic-conductor electrode. Second, the response time of the electromotive force is very short against the change of oxygen pressure and temperature.
    The two characteristics have been applied to kinetic study of heterogeneous reactions at elevated temperature as follows:
    (1) Gas composition profiles in the vicinity of the reaction surface have been continuously measured during the decarburization of liquid iron by carbon dioxide gas at 1550°C. It was shown that there is concentration gradient of carbon dioxide in the vicinity of the reaction surface and the gas phase is in unstable motion under the present experimental condition.
    (2) Intraparticle gas composition of metal oxide powders has been continuously measured during the reduction by hydrogen gas and carbon monoxide gas. The change of the electromotive force demonstrated the step-wise change of the intraparticle gas composition in relation to the two intermediate phases equilibria.
    (3) The rate of the change of oxygen pressure in the liquid metal and liquid oxide phases has been measured, when the oxygen pressure in the gas phase is quickly changed.
    The micromechanism of the reactions under consideration was discussed from both results obtained by the electromotive force method and by other methods.

  • Effects of Various Operating Conditions in LD Converter

    Shigeo ASAI, Iwao MUCHI

    pp. 1030-1040

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    Abstract

    In order to predict the differences in process variables which would be caused by altering operating conditions, a part of the mathematical model of oxygen top blowing converter proposed previously has been modified, and on the basis of this modified model, numerical calculations have been conducted with the aid of digital computer (HITAC 5020E) for various operating conditions. The operating conditions considered to alter in this work are as follows:
    1) feeding conditions of ore, lime and limestone, 2) back pressures of oxygen, 3) temperatures and carbon concentrations of pig iron charged into converter.

  • HCP Martensite in Iron Alloys

    Zenji NISHIYAMA

    pp. 1041-1050

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

  • Electron Fractography of Steels

    Kimio KIMURA, Akira SAKAMOTO

    pp. 1051-1070

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

  • 討論会集録

    三本木 貢治, 近藤 真一, 佐々木 稔, 中沢 孝夫, 渡辺 正次郎, 吉永 真弓, 福田 充一郎, 国井 和扶, 西田 礼次郎, 小泉 秀雄, 金本 勝, 鴻巣 彬, 中塚 勝人, 下飯坂 潤三, 松下 幸雄, 松田 亀松, 田中 英夫, 前川 静弥, 中川 義隆, 福本 勝, 谷口 晃造, 浅野 鋼一, 佐伯 毅

    pp. 1071-1086

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

  • 抄録

    pp. 1087-1102

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    Recommended Articles: 表面処理・その他 [ View more ]

    x

    Readers Who Read This Article Also Read

    1. 表面処理・その他 Tetsu-to-Hagané Vol.52(1966), No.11
    2. Kinetic Study of the Decarburization of Liquid Iron Tetsu-to-Hagané Vol.52(1966), No.12
    3. II 連続鋳造の凝固について Tetsu-to-Hagané Vol.56(1970), No.4
  • © 1969 The Iron and Steel Institute of Japan

Article Access Ranking

14 Apr. (Last 30 Days)

  1. Three-dimensional Investigations of Non-metallic Inclusions in Stainless Steels before and after Machining ISIJ International Advance Publication
  2. Perspective toward Long-term Global Goal for Carbon Dioxide Mitigation in Steel Industry Tetsu-to-Hagané Vol.105(2019), No.6
  3. Influence of Ore Assimilation and Pore Formation during Sintering on Reduction Behavior of Sintered Ores Tetsu-to-Hagané Vol.107(2021), No.3
  4. Numerical Simulation of Flow, Heat, Solidification, Solute Transfer and Electromagnetic Field for Vertical Mold and Curved Mold of Billet ISIJ International Vol.61(2021), No.3
  5. Deformation Behavior of Longitudinal Surface Flaws in Flat Rolling of Steel Wire ISIJ International Advance Publication
  6. Structural and Mechanical Characterizations of Top Dross in a Molten Zinc Bath ISIJ International Vol.61(2021), No.3
  7. Dissolution Behavior of Mg and Ca from Dolomite Refractory into Al-killed Molten Steel ISIJ International Advance Publication
  8. Numerical Study into Gravity Separation of Phosphorus from BOS Slag during Solidification ISIJ International Vol.61(2021), No.3
  9. Prediction of Spatial Composition Distribution of Inclusions in the Continuous Casting Bloom of a Bearing Steel under Unsteady Casting ISIJ International Vol.61(2021), No.3
  10. Improvement in Reduction Behavior of Sintered Ores in a Blast Furnace through Injection of Reformed Coke Oven Gas Tetsu-to-Hagané Vol.107(2021), No.4

Search Phrase Ranking

14 Apr. (Last 30 Days)

  1. blast furnace
  2. coke oven gas injection
  3. slag
  4. tetsu-to-hagané
  5. blast furnace productivity
  6. continuous casting of electrical steel
  7. electrical steel and continuous casting
  8. fundamental study on rapid reduction of chromium ore in basic oxygen furnace
  9. iron phosphide (fe2p, fe3p)
  10. iron phosphide (fe2p, fe3p), formation energy