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鉄と鋼 Vol. 47 (1961), No. 9

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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    5. No.12
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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
    6. No.9
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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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    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 Nov. (Last 30 Days)

鉄と鋼 Vol. 47 (1961), No. 9

On the Operation and its Conditions of a Pilot Plant Fluidizing Roaster

Kazuhisa OKAJIMA, Michio INOUYE, Kokichi SANO

pp. 1137-1143

抄録

Using the pilot plant fluidizing roaster, the pressure drop through the bed and the variation of its size distribution with the amount of overflow cinder were measured. The results obtained were as follows:
(1) The pressure drop obtained from the bed of particles under the conditions of roasting operation was closely approximate to the value by the Parent's equation which stated that the pressure drop was equivalent to the weight of sample.(2) From the experiments of varying amounts of the overflow cinders, it was found that the fraction of coarse particles tended to increase with decrease of the amount of the overflow cinder.
Then, the operation and its conditions of the pilot plant fluidizing roaster in the selective chlorination roasting of pyrite cinders were described in detail.

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Measurement on Erosion of the Blast Furnace Lining by the Radioactive Isotope

Satoshi HAYASHI, Gyoichi SUZUKI, Tadashi KOBAYASHI, Hiroshi IIZIMA, Tetuo YAMAGUCHI

pp. 1143-1147

抄録

A number of experimental results have been published at home and abroad concerning the use of radio isotopes in blast furnace operation.
An experiment conducted in our Kawasaki Iron Works of Japan Steel & Tube Corporation yielded the following results.
(1) 60Co was used as tracer for the purpose of estimating the quantity of residual molten pig iron and the eroded condition of hearth bricks.
As the result of this experment, erosion of bricks was fairly exactly estimated.
In the case of No.3 B. F., it was found that erosion of hearth bricks progressed rapidly within six months after the commencement of operation, but thereafter hearth bricks had been in comparatively stable conditions with a slight degree of erosion.
(2) Radiation originated from 60Co, which was embedded into bricks of shaft at the time of constructing the blast furnace, was detected during its operation; and eroded conditions of bricks was estimated with the loss of radiation.
As the result of this experiment, it was found that erosion of bricks was dependent largely upon the operation of blast furnace and the distribution of gas within the furnace, and that bricks at the lower part of shaft had been subject to fairly severe erosion within six months after the commencement of operation.

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Trial Manufacture of a Vacuum Arc-Melting Furnace for Laboratories

Shuzo TAKEDA, Naoki NAGAI, Natsuo YUKAWA, Fumio HORI

pp. 1148-1155

抄録

An arc furnace for melting non-refractory and refractory metals and alloys in vacuum or an inert atmosphere was described.
The furnace was designed by the authors with an emphasis placed on adaptability to diverse requirements of research, and can be used for arc melting with either a consumable or a non-consumable electrode. Besides, the specially designed sliding crusible gives prospect of preparing electroderods for the use of consumable melting.
Refractory metals, such as Ti, Cr and Mo as well as steels were successively arc-melted with the aid of this furnace.
The melting variables, such as arc current, voltage and stability as well as ingot quality and degassing were discussed based on the melting experience of various steels.

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On the Teeming in the Protective Atmosphere

Zenichiro TAKAO, Kiichi NARITA, Kazuo KANDA, Atsusi MIYAMOTO

pp. 1156-1162

抄録

An apparatus of the teeming in protective atmosphere that can simulates the practical operation was made in trial, then the teeming in air and in protective atmosphere was carried out. In both methods, the rate of oxidation of molten steel in air, which had effect on the occurrence tendency of the sand marks, the amount of oxide inclusions and the recovery of aluminum acting as the deoxidizer and the austenite grain refining etc., were compared each other and studied.
Results were summarized as follows;
1. The occurrence tendency of the sand marks was more remarkable in the teeming in air than in that in protective atmosphere. In the case of the teeming in air, the occurrence tendency of the sand marks depended on the kind of steel; that is, more remarkable with low-carbon chromium-molybdenum steel No.21 than with medium-carbon steel SAE 1030 and1040. In the teeming in protective atmosphere, however, no difference on it was recognized between the kind of steel.
2. The amount of oxide inclusions and the oxygen content was found more in the former teeming than in the latter one, and also was found more at the top and bottom parts of the ingot than at the middle part of it on both cases.
3. A strong tendency of the occurrence of the sand marks was found with forged or rolled steel having much oxide inclusions and much oxygen in comparison with that having less oxide inclusions and oxygen.
4. The recovery of aluminum was higher in the teeming in protective atmosphere than in that in air. Judging from results obtained, it was really recognized that the rate of oxidation of molten steel in air had a remarkable effect on the occurrence tendency of the sand marks, the amount of oxide inclusions and the recovery of aluminum.
This undesired oxidation of molten steel could be prevented by use of argon or nitrogen gas in the teeming in a protective atmosphere. Argon gas, however, was rather expensive so that nitrogen had better be used in practical operation from the economical point of view.

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Relation between Slack-Quenched Homogeneous Structure and Mechanical Properties of Spring Steel

Michira UCHIYAMA, Fujio SEKI, Kazunori KAMISHOHARA

pp. 1163-1169

抄録

Effects of microstructure on mechanical properties of C (SUP 3), Si-Mn (SUP6) and Mn-Cr (SUP9) spring steels were investigated.
Specimens prepared from each spring steel were first heat-treated to produce various asquenched structures: namely, martensite, fine pearlite or bainite.
These specimens were then tempered to the spring hardness HB 300-500 before testing.
Specimens heat-treated as above were subject to twisting, bending, fatigue or repeated impact tests.
Results obtained were summerized as follows.
1. The proportional limit of twisting or bending for sorbite specimens was the same without regard to the kind of steel.
2. The ratio of proportional limit of sorbitic structure to that of fine pearlitic or bainitic structure for the alloy spring steels was slightly higher than that for the carbon spring steel.
3. The results indicated also that the endurance limit or repeated impact value of each steel were nearly the same for sorbitic, fine pearlitic and bainitic structures.
4. Spring properties of steel with sorbitic structure were not always superior to that of a steel having fine pearlitic or bainitic structure.

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Effect of N and B on Properties of 18Cr-12Ni Stainless Steel

Ryuichi NAKAGAWA, Yasuo OTOGURO

pp. 1169-1174

抄録

In previous reports (Tetsu-to-Hagane 45, 11, 1276; 46, 5, 566; 46, 14, 1758), the authors reported the effect of Nb, Ti, W and Mo on properties of 18Cr-i2Ni austenitic stainless steels.
This report concerned the effect of N and B on aging behavior, microstructure, precipitates, tensile properties at various temperatures and creep-rupture strength of the same steel.
The following results were obtained:
1) The specimen with N was scarecely hardened during aging. The specimen with B was hardened when the C content was higher.
2) In the specimen with N, precipitates of Cr23C6 and Cr2N were observed. In the specimen with B, CrB2, Fe2B and B4C remained after solution treatment for one hour at 1100°and Cr23C6 precipitated during aging.
3) Tensile strength was increased linearly with the increase of N content at all testing temperatures, but that of the specimen coutaining B was raised with the increase of B content below 600°.
4) Creep rupture strength of the specimen with N reached maximum when the N content was about 0.16%. Creep-rupture strength of the specimen with B was increased greatly with the B content, but increased slightly when the B content exceeded 0.1%.
5) Oxidation resistance was almost invariable with different N contents when the Ncontent was less than 0.16% but grew slightly worse when the N content exceeded that content.
Oxidation resistance of the specimen containing B grew remarkably worse with increase that the B content.

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Recent Improvements in Operating a Blast Furnace, a Open-Hearth Furnace and a Wire Rod Mill in Kokura Steel Works, Sumitomo Metal Industries Ltd

Kozaburo SATOI

pp. 1197-1202

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