著者

青木 裕幸 武田 欣明 中嶋 睦生 迫村 良一 笹川 正智 半澤 和文

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.71, no.12, 1985-09-05

被引用文献数

1

著者

西澤 泰二

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.75, no.12, pp.2137-2138, 1989-12-01

著者

山岸 静直 半明 正之 小倉 英彦 田巻 直 外村 勝生 船越 邦治

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.68, no.11, 1982-08-20

著者

柳本 左門 玉野 敏隆

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.56, no.8, pp.1118-1135, 1970-07-01

著者

木村 久雄 小川 勤 柿木 充 松本 新 濱野 翼 月橋 文孝

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.92, no.12, pp.748-754, 2006-12-01

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Phase diagrams for the CaO-SiO_2-FeO_x-Al_2O_3 or -MgO systems at various oxygen partial pressures are necessary for the design of raw material for ironmaking, the analysis of smelting reaction and sintering process. To clarify the effect of Al_2O_3 or MgO content on the formation of melts in the sintering process is important for the development of new sinter. In this study, liquidus for the CaO-SiO_2-FeO_x-Al_2O_3 or -MgO systems at various oxygen partial pressures were observed at 1573K by using chemical equilibration technique. The liquid phase area changed with adding Al_2O_3 or MgO. The effect of the Fe^<3+>/Fe^<2+> ratio on the melting mechanism is discussed.

著者

藤井 孝一 石川 遼平 川見 明 瓜生 裕一

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.62, no.4, 1976-03-10

著者

中田 等 山内 学 森西 義章 増田 薫

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.89, no.4, pp.393-400, 2003-04

被引用文献数

2

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For the purpose of reducing CO_2 contents in the atmosphere, one of the solution is said to grow the biomass of phytoplankton by it's photosynthesis, that is enhances it's biological pump. When steelmaking slag is applied to the sea, the nutrient like phosphate and silicate, and ferrous ion as a micro nutrient, which is indispensable for the growth of phytoplankton, especially diatoms, is considered to be supplied sufficiently. This time, large tank test adding steelmaking slag was carried out, and increase behavior of phytoplankton was investigated. And at the same time, the behavior of various kinds of chemical elements which dissolves from steelmaking slag to the sea water examined in detail. The results show that contamination problems from the steelmaking slag which was applied to this experiment cannot be recognized. Behavior of dissolved element is compared to some experimental systems, for example, large tank test and beaker test etc., using analytical model. Furthermore, three dimensional simulation of dissolved nutrients from steelmaking slag was also investigated.

著者

坪井 善勝

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.52, no.1, pp.65-77, 1966-01-01

著者

池島 俊雄

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.65, no.10, pp.1644-1650, 1979-09-01

被引用文献数

2

著者

横山 一代 久保 裕也 森 一広 岡田 秀彦 竹内 秀次 長坂 徹也

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.92, no.11, pp.683-689, 2006-11-01

参考文献数

35

被引用文献数

3 18

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In order to make sure the great potential of steelmaking slag as a new phosphorus resource, domestic phosphorus material flow in Japan including iron and steel industry has been investigated based on the statistical data on 2002. It has been demonstrated that phosphorus in the steelmaking slag is almost equivalent with that in the imported phosphate rock in the view points of the amount and the concentration. Phosphorus exists mainly in the form of calcium-phosphate or its solid solution with calcium-silicate rather than the Fe_tO rich liquid phase in the slag and exhibits remarkable segregation in the solidified slag. If the strong magnetic field is applied to the crushed slag, precipitated calcium-phosphate solution phase can be separated from Fe_tO matrix phase due to the large difference of each magnetic property. It has also been indicated by the Waste Input-Output model that the phosphorus recovery from steelmaking slag by the new process proposed in the present work has great environmental and economical benefits.

著者

リーサム A. G. グルックス R. G. 安藤 剛

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.73, no.13, 1987-09-04

著者

小林 基伸 西 正明 三橋 博 永山 氏正 安斎 孝儀

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.69, no.4, 1983-03-01

被引用文献数

1

著者

大久保 英敏 西尾 茂文

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.79, no.4, pp.497-503, 1993-04-01

被引用文献数

1

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To predict mist cooling heat transfer, it is necessary to understand systematically this phenomena. However, since there are many parameters affecting mist cooling heat transfer and the effects of these parameters are very complicated, it is still a difficult task to predict mist cooling heat transfer for actual systems. In the present paper, the effect of surface diameter on mist cooling heat transfer was experimentally investigated. To do this, the diameter of test plates was varied from 10 to 30mm. Mist cooling experiments were conducted for horizontal upward-facing surfaces made of silver. The experimental results obtained in this study show that the diameter of the plate affects the heat transfer coefficient of mist cooling in the high-temperature region corresponding to the film boiling region on the boiling curve. Next, the correlating equations for the heat transfer characteristics of mist cooling in the high-temperature region are developed accounting for the effects of volumetric droplet flow rate and surface parameters including the effect of the surface diameter. These correlating equations are in good agreement with a number of experimental data.

著者

法華津 弘通 西野 和美

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.64, no.4, 1978-03-03

著者

本多 光太郎 竹前 源藏 渡邊 直行

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.17, no.10, pp.1047-1057, 1931-10-25

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The purpose of the present investigation was to measure quantitatively the efficiency of a shield plate in resisting penetration by a rifle bullet. A simple, mechanical, and accurate method for determining the velocity of the bullet was devised, by which the velocity of the bullet after passing through test plates of different thickness was measured. By this means the residual velocity vers. plate thickness curve for different metals was obtained. This curve which is called the "characteristic curve" of the shielding efficiency of a metal was obtained for different metals and alloys. The curve not only dives the residual velocity of a bullet after passing throgh a shield plate of a given thickness, but also the thickness of the metal plate which is just sufficient to stop the impinging bullet, on the "penetration distance". The best material found as the result of the present investigation is a special steel, the penetration distance of which is 4.5mm. for a bullet 9 grams in mass and a velocity 790 meters per second. The penetration distance of laminated plates, and of two plates of equal thickness separated from each other by a distance was also measured. The same quantity for wood, sand and glass, of different kinds was also measured.

著者

星野 和夫

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.69, no.8, pp.998-1005, 1983-06-01

被引用文献数

1 3

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The flow stress (σ) of unstable austenitic stainless steels is studied by comparing stable austenitic and martensitic stainless steels. (1) The root of dislocation density (√<ρ>) obtained by X-ray analysis in stable γ-phase increases with strain (ε) and the expression of ε as a function of √<ρ> is parabolic. √<ρ> of γ phase mixed with deformation-induced martensite (α′) increases with the root of α′ phase volume fraction (V_<α′^<1/2>>) in addition to the above relation. (2) σ of unstable steels is intermediate of the values caluculated by "equal stress model" and "equal strain model" and it becomes to take the values estimated by equal strain model with increase of α′-phase. In this case, the higher the strength of α′ phase is and the larger the volume of α′ phase is, the higher is the ununiformity of strain between γ and γ′ phase. In the case that the strength of α′phase is almost the same, the smaller the volume of γ′ phase is, the smaller is the ununiformity of strain between γ and α′phase. (3) σ is affected not only by the volume but also by the strength of α′ phase and inversely plastic flow depresses α′-transformation to inhibit the enhancement of higher σ values due to high strength of α′-phase.

著者

鵜野 達二 神原 健二郎 本間 悦郎

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.36, no.10, pp.479-485, 1950-10

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We studied the oxidation equilibrium of the reactions 3FeS+10CO_2&rlarr;Fe_3O_4+3SO_2+10CO MnS+3CO_2&rlarr;MnO+SO_2+3CO at 690&acd;890℃ and 600&acd;1000℃ respectively, by following method. Obtained the following equations for each reaction. Log K_<FeS>=Log p^<10>CO・P^3so_2/p^<10>CO_2=-52, 669.7/T+22.43 Log K_<MnS>=Log p^3CO・PSO_2/p^3CO_2=-18, 290.6/T+8.28 From this result calculated the equilibrium constant of the following reactions FeS+3CO_2&rlhar;FeO+SO_2+3CO FeS+2CO_2&rlarr;Fe+SO_2+2CO and obtained the following equations Log K_<FeO>=Log P^3CO・PSO_2/P^3CO_2=-18, 112.6/T+8.14 Log K_<Fe>=Log P^2CO・PSO_2/P^2CO_2=-17, 209.8/T+7.04 From these results obtained the equilibrium diagram between pco/pco_2 and pso_2 over ferrous sulphide.

著者

大橋 徹郎 広本 健 藤井 博務 塗 嘉夫 浅野 鋼一

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.62, no.6, pp.614-623, 1976-05-01

被引用文献数

5

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As a part of the study on the effect of oxides on heterogenuous nucleation during iron solidification, the effects of Al_2O_3, SiO_2, and rare earth oxides were examined, by measuring the critical supercooling of 300 g electrolytic iron under special slag in a Tammann furnace. The following results have been obtained. 1) The critical supercooling for heterogenuous nucleation is remarkably lowered than that of homogenuous nucleation. This value is 3℃ by the addition of R.E.M, and this is extremely small when compared with 14℃ by Al_2O_3, 30℃ by SiO_2, and 53℃ by MnO. 2) The heterogenuous nucleating potency of oxide catalyzers is dependent upon the difference of interfacial energy between the oxide substrate and δ-Fe. This interfacial energy can be theoretically explained by the disregistry between both crystals.

著者

岩瀬 正則 三木 伸一 竹下 博司 盛 利貞

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.62, no.11, 1976-09-03

著者

山本 普康 馬場 勘次 柿本 純忠 石原 明 吾郷 康人 新留 照英 稲葉 光延

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.79, no.3, pp.388-394, 1993-03-01

被引用文献数

1

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A demand of quality improvement for flatness and edge-drop has been recently increasing in cold rolling of steel strip. The accurate control systems of strip shape and edge-drop have been developed for the new tandem cold rolling mill in Yawata Works, which has 5 stands of 6 Hi-UC・WR shift mill. The control system of strip shape consists of the initial set-up for roll benders, intermediate roll shifts of all stands, a feedback control for roll benders and roll levelling of No.5 stand by using signals of the shape meter which is installed at the exit of No.5 stand. The control system of edge-drop consists of the initial set-up for work roll shifts of No.1&acd;4 stands and the feedforward control for work roll shifts of No.1&acd;4 stands by using signals of the crown meter which is installed at the entry of No.1 stand. Application of these control systems to the new tandem cold mill shows the good controllability of flatness and edge-drop in cold rolling of steel strip. The strip flatness is within ±0.7% of inclination in an overall length of strip, and the accuracy of edge-drop is 1.2μm in average and within ±3μm in an overall length of strip.