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鉄と鋼 Vol. 97 (2011), No. 7

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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  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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  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. 97 (2011), No. 7

固体CaO上Al含有鋼ならびにAl–S含有鋼の濡れ挙動

吉川 健, 本杉 和也, 田中 敏宏, 上田 満

pp. 361-368

DOI:

10.2355/tetsutohagane.97.361

抄録

Wettability between refining agent and molten steel is an important factor in the refining process due to its great influence on the reaction interface. In the present study, wetting behaviors of steels containing Al and Al–S on CaO substrates were investigated by the sessile drop method at 1550°C in order to understand the interfacial phenomena during the refining of steel with solid CaO. Contact angle of steel containing Al on a CaO substrate was smaller than that of pure iron. The contact angle decreased with the smaller addition of Al, which could be explained from the amount of slag formation by the reaction between steel and CaO. The contact angle of steel containing Al–S was larger with the higher initial Al content and increased during the holding. It was mostly affected by the surfactant effect by soluble sulfur, and the wettability deteriorated by the progress of desulfurization.

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固体CaO上Al含有鋼ならびにAl–S含有鋼の濡れ挙動

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横型遠心鋳造プロセスにおける等軸晶挙動の直接観察

江阪 久雄, 平本 潤一, 宮原 翔太, 徳差 圭, 篠塚 計

pp. 369-375

DOI:

10.2355/tetsutohagane.97.369

抄録

Centrifugal casting technique has been widely used to produce long products, such as pipes. In this casting, sometimes problems such as macroscopic segregation arise. However, we have not found effective countermeasures. This reason may be attributed to the fact that solidification under being applied centrifugal force itself has not been well understood. Therefore, in order to understand the solidification process in centrifugal casting, in-situ observations using transparent substance have been performed by an experimental equipment newly developed. One of the advantageous points of this equipment is that a video camera is installed on the rotating shaft enabling observation of predetermined area during whole period of solidification. Owing to the thermal gradient imposed, transparent substance solidifies inward.
At the initial stage, columnar dendrites grew from the rim. Then, equiaxed grains formed in the liquid phase. Equiaxed grains oscillated not only in radial direction but tangential direction synchronized with the rotation. This movement became smaller as solidification proceeded. This change in oscillation with time is due to the increase of apparent viscosity as solidification proceeds.

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横型遠心鋳造プロセスにおける等軸晶挙動の直接観察

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SUS304の微小成形における型形状の転写特性に及ぼす結晶粒径の影響

加藤 正仁

pp. 376-381

DOI:

10.2355/tetsutohagane.97.376

抄録

The microforming of SUS304 stainless steel with fine grain structures is carried out utilizing superplastic phenomenon. The configurations of formed structures are studied, and transcription properties are discussed. In this study, two types of experiments were carried out. One involved tests to form a micro-pyramid on the specimen by Vickers indentation as the die, and the other involved tests to form micro gratings by grinding mark as the die. The processed materials could not make contact to dies at the area around the top of the micro pyramid, which was 4–5 times the diameter of the grain size. It is believed that the flow into the top of the pyramid was blocked by the formation of a bridge of grains. And the lower limit to form micro gratings utilizing superplastic phenomenon was determined to be of the same size as of the grain of processed material.

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SUS304の微小成形における型形状の転写特性に及ぼす結晶粒径の影響

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Ti–3Al–2.5V薄板の角筒深絞り成形シミュレーション

大上 哲郎, 斉藤 新, 高橋 一浩, 藤井 秀樹, 潮田 浩作

pp. 382-387

DOI:

10.2355/tetsutohagane.97.382

抄録

FEM analysis utilizing Barlat–Lian'89 anisotropy model and square shell deep drawing test at room temperature were carried out in order to improve the formability of Ti–3Al–2.5V sheet. As for the flange wrinkle, FEM analysis coincide with the experimental result more in case of 1.5% R-value than that of 5% R-value. The bigger the ΔCL , the greater the flange wrinkle. On the contrary the bigger the Rave, the smaller the flange wrinkle. Moreover, flange wrinkle decreases abruptly when Rave becomes equal or exceeds 2.0 in case that forming height becomes maximum value of 30 mm. And the flange breakage, occurs at the straight region of C-direction, proved to be caused by the shear stress.

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Ti–3Al–2.5V薄板の角筒深絞り成形シミュレーション

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ステンレス鋼板の熱間圧延における焼付きの発生および硫黄添加剤の評価

鳥海 貴大, 小豆島 明

pp. 388-392

DOI:

10.2355/tetsutohagane.97.388

抄録

The sticking during hot strip rolling of ferritic stainless steel is evaluated using a tribo-simulator developed by the authors. The experiments of sliding rolling with an emulsion of Colza oil are carried out changing rolling conditions of rolling speed and rolling reduction using specimens of SUS430 and rolls with HSS (High Speed Steel). From these experimental results, it is confirmed that the sticking during strip rolling of ferritic stainless steel can be evaluated using the tribo-simulator. Then, the effects of S additive on the sticking are investigated. The experiments are carried out using emulsions of Colza oils with S additive contents of 20, 30, 50 and 80%. The limitation reduction when occurring the sticking increases with increasing S additive content.

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熱間圧延中の表面酸化皮膜の挙動と圧延特性

原 健一郎, 宇都宮 裕, 左海 哲夫, 柳 修介

pp. 393-398

DOI:

10.2355/tetsutohagane.97.393

抄録

In hot steel rolling process, oxide layer, i.e. scale, is formed on surface by oxidation. The scale may influence friction between rolls and workpiece and affect rolling characteristics. In this study, low carbon steel sheet was inserted to a furnace at 1173K, 1273K, 1373K filled with argon. After 900 s, the atmosphere was changed to air to allow oxide scale to grow for 0, 10, 40 s. After the oxidation, the sheet was immediately rolled by 10–30% on a two-high laboratory mill. After passing the roll bite, glass powder was sprinkled over the sheet to suppress secondary oxidation.
If the oxidation time is 0 s, the thin scale deforms relatively uniformly at all the three temperatures. At 1173K, if the oxidation time is 40 s, the scale is indented to the matrix steel, the interface between the scale and the matrix steel roughens apparently. At 1273K, the scale fractures and the matrix steel is extruded through cracks to outermost surface. At 1373K, the scale cracks in thickness direction, however the interface between the scale and the steel is smooth. The rolling force is not sensitive to the oxidation time at 1173K. At 1273K and 1373K, However, when the reduction is high, the force decreases with oxidation time. In these cases, the internal shear deformation decreases with oxidation time. It is supposed that thick scale tends to fracture and decreases the shear deformation by introducing relative sliding between the rolls and the matrix steel.

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熱間圧延中の表面酸化皮膜の挙動と圧延特性

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低炭素高合金鋼マルテンサイト変態過程のオーステナイト粒内でのバリアント選択

張 朔源, 森戸 茂一, 小溝 裕一

pp. 399-405

DOI:

10.2355/tetsutohagane.97.399

抄録

Development of lath martensite structure in low carbon high alloy steel was in-situ observed using high temperature laser scanning confocal microscopy. The crystallography of the martensite structure was analyzed using electron backscatter diffraction patterns. It was observed that martensite transformation starts from the prior austenite grain boundary. Then, transformation proceeds along the growth direction of martensite block formed initially in the prior austenite grain. Finally, transformation takes place in the neighbors of transformed martensite block.

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低炭素高合金鋼マルテンサイト変態過程のオーステナイト粒内でのバリアント選択

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