実機焼結鉱を構成する多成分カルシウムフェライト(SFCA:Silico-Ferrite Calcium Aluminum)の構造評価
杉山 和正, 川又 透, 佐藤 晴士, 三河内 岳
ジャーナル
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 |
Backnumber
Vol. 111 (2025)
Vol. 110 (2024)
Vol. 109 (2023)
Vol. 108 (2022)
Vol. 107 (2021)
Vol. 106 (2020)
Vol. 105 (2019)
Vol. 104 (2018)
Vol. 103 (2017)
Vol. 102 (2016)
Vol. 101 (2015)
Vol. 100 (2014)
Vol. 99 (2013)
Vol. 98 (2012)
Vol. 97 (2011)
Vol. 96 (2010)
Vol. 95 (2009)
Vol. 94 (2008)
Vol. 93 (2007)
Vol. 92 (2006)
Vol. 91 (2005)
Vol. 90 (2004)
Vol. 89 (2003)
Vol. 88 (2002)
Vol. 87 (2001)
Vol. 86 (2000)
Vol. 85 (1999)
Vol. 84 (1998)
Vol. 83 (1997)
Vol. 82 (1996)
Vol. 81 (1995)
Vol. 80 (1994)
Vol. 79 (1993)
Vol. 78 (1992)
Vol. 77 (1991)
Vol. 76 (1990)
Vol. 75 (1989)
Vol. 74 (1988)
Vol. 73 (1987)
Vol. 72 (1986)
Vol. 71 (1985)
Vol. 70 (1984)
Vol. 69 (1983)
Vol. 68 (1982)
Vol. 67 (1981)
Vol. 66 (1980)
Vol. 65 (1979)
Vol. 64 (1978)
Vol. 63 (1977)
Vol. 62 (1976)
Vol. 61 (1975)
Vol. 60 (1974)
Vol. 59 (1973)
Vol. 58 (1972)
Vol. 57 (1971)
Vol. 56 (1970)
Vol. 55 (1969)
Vol. 54 (1968)
Vol. 53 (1967)
Vol. 52 (1966)
Vol. 51 (1965)
Vol. 50 (1964)
Vol. 49 (1963)
Vol. 48 (1962)
Vol. 47 (1961)
Vol. 46 (1960)
Vol. 45 (1959)
Vol. 44 (1958)
Vol. 43 (1957)
Vol. 42 (1956)
Vol. 41 (1955)
杉山 和正, 川又 透, 佐藤 晴士, 三河内 岳
木内 夏実, 青木 祥宏, 潮田 浩作, 仲井 正昭, 松本 洋明, 藤井 英俊
澤井 建吾, 小川 登志男, 陳 達徳, 孫 飛, 足立 吉隆
宗岡 均, 伊藤 剛仁, 寺嶋 和夫
笹井 勝浩
他の人はこちらも検索
ISIJ International Vol.65(2025), No.2
丸山 直紀, 山本 三幸, 田畑 進一郎
吉村 凱聖, 賀來 亜門, 八山 靖代, 工藤 真二, 林 潤一郎
助永 壮平, 小里 文太, 小野寺 陽平, 小原 真司, 清水 雅弘, 西 剛史, 遠藤 理恵, 笘居 高明, 横 哲, 川西 咲子, 深谷 宏, 太田 弘道, 柴田 浩幸
篠原 祐治, 坪内 直人
他の人はこちらも検索
ISIJ International Vol.65(2025), No.6
内田 誠治, 柏原 佑介, 川尻 雄基, 廣澤 寿幸, 山本 哲也
他の人はこちらも検索
鉄と鋼 早期公開
鉄と鋼 早期公開
鉄と鋼 早期公開
趙 研, 吉岡 明日香, 安田 弘行
大宮 正仁, 塩田 佳紀, 榊原 洋平, 久布白 圭司, 山﨑 重人, 田中 將己
丸岡 大佑, 俣岡 昌嗣郎, 葛西 栄輝, 村上 太一
他の人はこちらも検索
鉄と鋼 早期公開
鉄と鋼 早期公開
鉄と鋼 早期公開
池田 幸平, 佐伯 成駿, 竹原 健太, 友澤 方成, 河野 崇史
他の人はこちらも検索
鉄と鋼 早期公開
鉄と鋼 早期公開
鉄と鋼 早期公開
山﨑 慎太郎, 足立 毅郎, 田口 洋行, 大菅 宏児, 古賀 貴智, 燒谷 将大, 宮川 一也
他の人はこちらも検索
鉄と鋼 早期公開
鉄と鋼 早期公開
鉄と鋼 早期公開
平野 圭祐, 筒井 和政, 高山 透, 松村 勝
他の人はこちらも検索
鉄と鋼 早期公開
鉄と鋼 早期公開
鉄と鋼 早期公開
丸岡 大佑, 木村 七晟, 葛西 栄輝, 村上 太一
他の人はこちらも検索
鉄と鋼 早期公開
鉄と鋼 早期公開
鉄と鋼 早期公開
丸岡 大佑, 大沼 優斗, 葛西 栄輝, 村上 太一
他の人はこちらも検索
松村 勝, 野田 恵吾, 岡田 康平, 長田 淳治, 樋口 謙一
他の人はこちらも検索
堀田 謙弥, 竹原 健太, 岩見 友司, 樋口 隆英, 山本 哲也
虎本 陸希, 山下 享介, 潮田 浩作, 大村 朋彦, 藤井 英俊
武市 泰男, 村尾 玲⼦, ⽊村 正雄
抄録
The reducibility and mechanical properties of iron ore sinter in blast furnace is critical to effective plant operation. The reduction reaction of sinters progresses heterogeneously owing to microstructures with various mineral phases and pore networks. The reduction process was investigated by semi-microbeam synchrotron X-ray multimodal analysis. Heterogeneous chemical state evolution of Fe and trigger sites of crack formation were visualized using two-dimensional Fe K-edge X-ray absorption near-edge structure analysis and were discussed based on reduction gas transfer. The elemental composition map and X-ray diffraction microanalysis were also combined to reveal the microprocesses during the reduction, such as calcium ferrite decomposition and crystal grain growth.
柳樂 知也, 中村 照美, 澤口 孝宏, 森 正和, 森貞 好昭, 藤井 英俊
抄録
Friction stir welding (FSW) was applied to a 10 mm-thick plate for the Fe-15Mn-10Cr-8Ni-4Si seismic damping alloy. A sound FSW joint was obtained successfully without macro-defects such as groove-like defects and tunnel holes. However, small pores with diameters of 1–5 μm were formed owing to the wear of the FSW tool during the FSW. The decrease in the heat input suppressed the tool wear. Consequently, the distribution of small pores was limited to the border of the stir zone at the advancing side under smaller heat input conditions. The stir zone of the FSW specimen produced at 125 rpm showed a higher tensile strength of 759 MPa owing to the grain refinement and the high elongation of 50% compared with the base metal. In addition, the stir zone exhibited a remarkable fatigue life of 9,723 cycles. This was higher than that of the base metal (8,908 cycles). Grain refinement occurred by discontinuous dynamic recrystallization (DDRX) via high-angle boundary bulging and direct nucleation in the high-dislocation area. The increase in the heat input suppressed the DDRX owing to the promotion of dynamic recovery.
竹原 健太, 池田 幸平, 河野 崇史, 樋口 隆英
抄録
To reduce the reducing agent ratio and CO2 emissions in blast furnace operation, it is important to control the material structure of sintered ore, which affects its metallurgical and mechanical properties. Multicomponent calcium ferrites (also called CF or SFCA (silico-ferrite of calcium and aluminum)), which is a type of melting and solidification structure, has attracted considerable interest recently, and the chemical composition and crystal structure of each CF have been researched. Although the crystal structure of CF has conventionally been analyzed mainly by XRD, the atomic arrangement could not be observed directly. Therefore, in this study, CF was investigated at the atomic level by scanning transmission electron microscopy (STEM). This research revealed that acicular CF, which was previously understood to be SFCA-I, has a SFCA (≠ SFCA-I)structure. It was also found that columnar CF had a non-periodic SFCA structure induced with a magnetite-like structure. Furthermore, a CF in which SFCA and SFCA-I were alternately stacked repeatedly was also discovered. This research clarified the fact that CF has a non-periodic structure at the atomic level.
高橋 あまね, 内沢 幸宏, 佐藤 博一, 渡邊 玄, 遠藤 理恵, 須佐 匡裕, 林 幸
抄録
The effect of Al2O3 on the compositional region of silico-ferrite of calcium and aluminum (SFCA) and the liquid phase and the phase equilibria, including SFCA, was investigated in a CaO-SiO2-Fe2O3-5mass%Al2O3 system at 1240 °C in air. To obtain the desired composition, reagent-grade CaCO3, SiO2, Fe2O3, and Al2O3 powders were weighed, mixed, and equilibrated at 1240 °C in air. Each obtained sample was divided into two parts: one was pulverized into a powder and analyzed by XRD, and the other was subjected to microstructural observation and compositional analysis using EPMA. The results revealed that the compositional region of SFCA lies on the CF3-CA3-C4S3 plane and is C/S = 2.77–7.60 for 5 mass% Al2O3. Compared with the SFC composition region for 0 mass% Al2O3, the compositional range of SFCA extended in the CF3-C4S3 direction, suggesting that the addition of Al2O3 contributes to the stability of SFCA. Furthermore, the liquid-phase region was divided into a ferrite melt with a high Fe2O3 concentration and a silicate melt with a high SiO2 concentration, both of which shifted to the lower Fe2O3 side compared to the liquidus isotherm in the CaO-SiO2-Fe2O3 system. Unlike CaO-SiO2-Fe2O3, SFCA-I (SFC-I) was observed in the CaO-SiO2-Fe2O3-5mass%Al2O3 system, thus indicating that the addition of Al2O3 contributes to the stability of SFCA-I.
他の人はこちらも検索
鉄と鋼 Vol.110(2024), No.13
松村 勝, 小杉 亮太, 山本 雄一郎, 長田 淳治, 樋口 謙一
抄録
Conventionally, it has been known that the product yield of the upper part of the sintering layer is extremely low, because of the heat loss caused by transferring heat toward the space above sintering layer, and of the large amount of unburned carbon in upper sintering layer.
19 Jun. (Last 30 Days)
ISIJ International Vol.65(2025), No.2
ISIJ International Vol.65(2025), No.2
鉄と鋼 早期公開
ISIJ International Vol.64(2024), No.10
ISIJ International Vol.65(2025), No.6
ISIJ International 早期公開
この機能はログイン後に利用できます。
下のボタンをクリックしてください。
出版日を西暦で入力してください(4桁の数字)。
検索したいキーワードを入力して下さい