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鉄と鋼 Vol. 55 (1969), No. 4

ISIJ International
belloff

Grid List Abstracts
オンライン版ISSN: 1883-2954
冊子版ISSN: 0021-1575
発行機関: The Iron and Steel Institute of Japan

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  1. Vol. 110 (2024)

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  5. Vol. 106 (2020)

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  6. Vol. 105 (2019)

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  7. Vol. 104 (2018)

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  8. Vol. 103 (2017)

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  9. Vol. 102 (2016)

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  10. Vol. 101 (2015)

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  11. Vol. 100 (2014)

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  12. Vol. 99 (2013)

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  13. Vol. 98 (2012)

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  14. Vol. 97 (2011)

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  15. Vol. 96 (2010)

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  16. Vol. 95 (2009)

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  17. Vol. 94 (2008)

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  18. Vol. 93 (2007)

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  19. Vol. 92 (2006)

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  20. Vol. 91 (2005)

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  21. Vol. 90 (2004)

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  22. Vol. 89 (2003)

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  23. Vol. 88 (2002)

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  24. Vol. 87 (2001)

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  25. Vol. 86 (2000)

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  26. Vol. 85 (1999)

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  27. Vol. 84 (1998)

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  28. Vol. 83 (1997)

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  29. Vol. 82 (1996)

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  30. Vol. 81 (1995)

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  31. Vol. 80 (1994)

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  32. Vol. 79 (1993)

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  33. Vol. 78 (1992)

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  34. Vol. 77 (1991)

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  35. Vol. 76 (1990)

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  36. Vol. 75 (1989)

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  37. Vol. 74 (1988)

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  38. Vol. 73 (1987)

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  39. Vol. 72 (1986)

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  40. Vol. 71 (1985)

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  41. Vol. 70 (1984)

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  42. Vol. 69 (1983)

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  43. Vol. 68 (1982)

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  44. Vol. 67 (1981)

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  45. Vol. 66 (1980)

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    5. No.10
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  46. Vol. 65 (1979)

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  47. Vol. 64 (1978)

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  48. Vol. 63 (1977)

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  49. Vol. 62 (1976)

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  50. Vol. 61 (1975)

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  51. Vol. 60 (1974)

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  52. Vol. 59 (1973)

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  53. Vol. 58 (1972)

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  54. Vol. 57 (1971)

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  55. Vol. 56 (1970)

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  56. Vol. 55 (1969)

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  57. Vol. 54 (1968)

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  58. Vol. 53 (1967)

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  59. Vol. 52 (1966)

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  60. Vol. 51 (1965)

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  61. Vol. 50 (1964)

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  62. Vol. 49 (1963)

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  63. Vol. 48 (1962)

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  64. Vol. 47 (1961)

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  65. Vol. 46 (1960)

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  66. Vol. 45 (1959)

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  67. Vol. 44 (1958)

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  68. Vol. 43 (1957)

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  69. Vol. 42 (1956)

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  70. Vol. 41 (1955)

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    2. No.11
    3. No.10
    4. No.9
    5. No.8
    6. No.7
    7. No.6
    8. No.5
    9. No.4
    10. No.3
    11. No.2
    12. No.1

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21 Dec. (Last 30 Days)

鉄と鋼 Vol. 55 (1969), No. 4

Activities in the Iron-Oxide Silica Slags

Haruhiko FUJITA, Shigeaki MARUHASHI

pp. 249-260

抄録

The distribution of oxygen between molten iron and silica-iron oxide slags was determined at 1560°C and the results were used to determine the activities of the components in the iron oxide-silica system.
The activity of iron oxide changes from positive deviation from ideality at low silica concentration to negative deviation beyond 0.28 mole fraction of silica.
At the silica saturated composition, a value of 0.455 for the iron oxide activity was obtained.
The activity of silica, which is calculated from GIBBS-DUHEM equation, shows considerable positive deviation from ideal behavior for any composition where silica concentration is greater than about 0.1 mole fraction.
The free energy of formation of liquid fayalite in the melt was calculated through the activity data.
These activity data give a value of -5.45 kcal/mol at 1560°C-a result which is in agreement with some other investigators'.
From the phase diagram, and the thermal data for Wustit, the activities of iron oxide in the melt were deduced over the range where the liquid is in equilibrium with solid Wustit and the results were compared with the values obtained from the slag-metal equilibrium study. It was showed that the estimated values lie close to experimental results.
The “excess stability” curve was constructed from the activity diagram. The curve has the maximum value at 2FeO·SiO2 composition, Which is in agreement with the DARKEN'S finding for the similar system studied by SCHUHAMANN et al.
The theories on the ionic structure of the iron oxide-silica melts were discussed.

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Relation between the Viscosity and Conductivity of Molten Slags

Makoto KATO, Susumu MINOWA

pp. 260-286

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Relation between the visccsity and electrical conductivity was discussed with the molten CaO-SiO2-Al2O3 cr [CaO (43)-SiO2 (43)-Al2O3 (14)]-addition system, from the arrangements of the data which were reported in previous works. The viscosity coefficient and conductivity were related with each other, in the equation log η=a+b·log κ. The calculated viscosity coefficient is in good agreement with observed one. The estimation of the density, surface tension, viscosity coefficient or conductivity from the slag composition was tried on the molten CaO-SiO2-Al2O3 system.

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Metallographic Analysis of Titanium in Titanium Treated Steel

Shigeo WAKAMATSU

pp. 287-297

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A simple accurate method for the metallographic analysis of titanium in titanium treated steel is devised. The procedure is as follows:
1. Separation of titanium:
(a) Dissolve 1 g of sample in 30 ml of HCl (1: 2). Filter and wash with hot HCl (1: 9).
(b) Dilute the filtrate to 50 ml in a volumetric flask, and determine titanium as solid solution continue in accordance with section 2 (a) to (c).
(c) Transfer the paper and residue (Paragraph (a)) to the beaker, add 30 ml of HNO3 (1: 1) and boil for 5 min. Filter and wash with hot water.
(d) Add 2 ml of H2SO4 to the filtrate and evaporate to a sirup. Dissolve salt with 40 ml of HC1 (1: 1), cool, dilute to 100 ml or 200 ml in a volumetric flask, and determine titanium as carbide continue in acordance with section 2 (a) to (c).
(e) Transfer the paper and residue (Paragaph (c)) to the beaker, add 20 ml of HNO3 (1: 1) and 5 ml of H202, and boil for 10 min. Filter and wash with hot water.
(f) Add 2 ml of H2SO4 to the filtrate and evaporate to a sirup. Disslove salt with 10 ml of HCl (1: 1), cool, dilute to 50 ml in a volumetric flask, and determine titanium as nitride continue in accordance with section 2 (a) to (c).
(g) Transfer the paper and residue (Paragraph (e)) to the beaker, add 40 ml of HNO3, 3 ml of HClO4, and 2 ml of H2SO4, and evaporate to a sirup. Dissolve salt with 10 ml of HCl (1: 1), cool, dilute to 50 ml in a volumetric frask, and determine titanium as oxide continue in accordance with section 2 (a) to (c).
2. Photometric determination of titanium:
(a) Sample solution-Transfer 10 ml aliquot of solution Section (b), (d), (f) and (g) to 50 ml volumetric flask, add 5 ml of H2O and 8 ml of ascorbic acid solution (10%) to reduce iron, and then add 5 ml of HCl (1: 1) and 20 ml of diantipyrylmethane solution (1.5%), dilute to the mark.
(b) Reference solution-Carry through all the steps of the procedure as directed in paragraph (a). However, no add diantipyrylmethane solution.
(c) After 20 min, measure the absorbance against reference solution at 385 μ

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