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鉄と鋼 Vol. 108 (2022), No. 5

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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    3. No.14
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  2. Vol. 109 (2023)

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  3. Vol. 108 (2022)

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  4. Vol. 107 (2021)

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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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    6. No.7
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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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21 Dec. (Last 30 Days)

鉄と鋼 Vol. 108 (2022), No. 5

高ESIブリキ用冷間圧延油の開発

石井 辰明, 稲垣 訓, 松永 昇, 王 大明

pp. 287-294

DOI:

10.2355/tetsutohagane.TETSU-2021-099

抄録

In the previous study, a cationic rolling oil containing cationic and non-ionic emulsifiers was developed and was used for sheet gauge rolling in a tandem mill.In this study, the previously developed cationic rolling oil was further improved and applied to tinplate rolling, and it generated higher friction and pressure in the roll-bite than in sheet gauge rolling.The improved oil was formulated with a special agent to enhance its lubricity during high-speed rolling, and its emulsion stability was also improved by adjusting the emulsifier. The emulsification stabilities and plate-out properties of conventional non-ionic, the previously developed cationic, and the improved cationic rolling oils were investigated on a laboratory scale. In the emulsification stability test, the average particle size of the improved cationic oil solution was found to be reduced to less than half that of the previously developed cationic oil. In addition, the amount of plate-out film of the improved oil was three times higher than that of the conventional non-ionic rolling oil at 170°C. The plate-out properties on high-temperature specimens at 200°C with and without the special agent were also verified.Furthermore, the effectiveness of the improved oil was verified in an actual mill. The maximum rolling speed of improved oil was faster than that of the current rolling oil with nonionic emulsifier. Based on this result, the improved oil having better lubricity was confirmed.In conclusion, the improved oil can be used for tinplate production to maintain stable coolant with a high level of ESI.

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高ESIブリキ用冷間圧延油の開発

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Ti-Rare Earth Metal (REM)-Zr脱酸鋼のじん性に及ぼすアシキュラーフェライト組織の影響

名古 秀徳, 宮本 吾郎, 張 咏杰, 古原 忠

pp. 295-305

DOI:

10.2355/tetsutohagane.TETSU-2021-127

抄録

Novel oxide particles composed of Ti, rare-earth metal and Zr was found by the present authors to promote the formation of acicular ferrite (AF), but their effect on toughness has not yet been clarified. Therefore, influence of AF formation on toughness of low carbon steel has been investigated using Ti-Rare earth metal-Zr-killed (TRZ) steel and Al-killed (AL) steels in this study. Dominant microstructure of the AL steel is bainite forming block/packet structure elongated from prior austenite grain boundaries. In contrast, a large amount of AF which grows from intragranular inclusions is formed in the TRZ steel. Toughness of the TRZ steel is better than the AL steel. In addition, at higher austenitizing temperature, AF formation is promoted in the TRZ steel, leading to lowering ductile-brittle transition temperature. Cracks in Charpy impact specimens propagate along {001}α plane and deflect at Bain unit boundary across which {001}α planes are largely misoriented, which means the effective grain size for crack propagation is Bain unit size. Bain unit size is smaller in the TRZ steel than in the AL steel since bainite structure is subdivided by pre-formed AFs belonging to different Bain groups from bainite. Martensite-austenite constituent (MA) in AF is less-elongated in comparison to those in bainite and thus the amount of elongated MA in the TRZ steel is less than in the AL steel. These results clarify that AF formation in the TRZ steel improves toughness due to the refinement of Bain unit size and reduction of the amount of elongated MA.

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Ti-Rare Earth Metal (REM)-Zr脱酸鋼のじん性に及ぼすアシキュラーフェライト組織の影響

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中Mn鋼の中断焼入-二相域焼鈍により形成されるコア-シェル型第二相組織の制御

土山 聡宏, 坂本 孝之, 田中 祥平, 増村 拓朗

pp. 306-315

DOI:

10.2355/tetsutohagane.TETSU-2021-123

抄録

Medium manganese steel (Fe-5.0%Mn-1.2%Si-0.10%C alloy) was subjected to interrupted quenching from the austenite single-phase region to a temperature between Ms and Mf followed by intercritical annealing in the ferrite and austenite dual-phase region at 923 K. As a result, a core-shell type second phase, which consisted of a fresh martensite core surrounded by a film-like retained austenite shell, was formed. The mechanism and kinetics of reversion for the interrupted-quenched specimens were analyzed with DICTRA simulation and TEM observation. With regard to the effect of the core-shell type second phase on mechanical properties, it was inferred that the fresh martensite core functioned as a hard second phase and enhanced work hardening by stress partitioning similar to DP steel, while the film-like retained austenite contributed to improved ductility due to the TRIP effect. As the interrupted quenching temperature decreased, the volume fraction of the fresh martensite core decreased, while the stability of the retained austenite shell increased. This showed potential for controlling the strength and ductility balance of medium manganese steel. A possible beneficial effect of the core-shell type second phase on the ductile fracture behavior was also discussed in terms of stress/strain relaxation at the interfaces between hard martensite and ferrite matrix.

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中Mn鋼の中断焼入-二相域焼鈍により形成されるコア-シェル型第二相組織の制御

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高強度鋼板中の水素拡散挙動に及ぼす張出し加工の影響

西村 隼杜, 味戸 沙耶, 北條 智彦, 小山 元道, 藤田 健一, 柴山 由樹, 柿沼 洋, 秋山 英二

pp. 316-324

DOI:

10.2355/tetsutohagane.TETSU-2021-096

抄録

The hydrogen diffusion behavior in a tempered martensitic steel sheet with 1-GPa grade tensile strength was investigated utilizing a newly developed hydrogen visualization technique using an Ir complex, whose color changes from yellow to orange due to its reaction with hydrogen. The hydrogen permeation through the steel sheet could be monitored from the color change of the Ir complex. Furthermore, the breakthrough time of hydrogen through the specimen could be qualitatively evaluated from the changes in the brightness of the Ir complex. This hydrogen visualization technique was also applied to a steel sheet stretch-formed using a hemisphere punch to simulate press-forming of automotive structural parts. The hydrogen breakthrough time around the top of the specimen was long and decreased with increasing the distance from the top. According to the plastic strain distribution of the specimen calculated by the finite element method, the hydrogen breakthrough time increased with increasing plastic strain. It was considered that the introduction of plastic strain decreased the hydrogen diffusion coefficient due to the introduction of dislocations acting as hydrogen trap sites, resulting in the increase of hydrogen breakthrough time.

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高強度鋼板中の水素拡散挙動に及ぼす張出し加工の影響

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9Cr-3Co-3W-Nd-B鋼のクリープ特性に及ぼすネオジム含有量の影響

浜口 友彰, 光原 昌寿, 楠原 英斗

pp. 325-333

DOI:

10.2355/tetsutohagane.TETSU-2021-103

抄録

The effects of the neodymium content on the creep properties and metallographic structure of 9Cr-3Co-3W-Nd-B steel were investigated. Neodymium had a mild effect on the creep rupture strength at contents up to 0.056 mass%. This suggested that the effects of neodymium compounds and solid-dissolved neodymium were minimal in the microstructures and uniformly creep-deformed parts after normalizing and tempering heat treatment. On the other hand, the reduction of area after creep rupture was improved by the addition of neodymium. Creep rupture occurred at the prior austenite grain boundaries on steel without neodymium. Therefore, neodymium conclusively adhered to the segregated sulfur at the prior austenite grain boundaries to suppress the formation of creep cracks.

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9Cr-3Co-3W-Nd-B鋼のクリープ特性に及ぼすネオジム含有量の影響

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