著者

木村 啓造

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.72, no.1, pp.113-122, 1986-01-01

被引用文献数

1

著者

田村 博

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.67, no.9, pp.1447-1459, 1981-07-01

著者

杉江 英司 松岡 雅典 秋山 俊弥 三村 宏 住友 芳夫

出版者

社団法人日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.69, no.9, pp.1190-1197, 1983

被引用文献数

2

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High Strength Line Pipe Research Committee in the Iron and Steel Institute of Japan has conducted five full scale burst tests with air pressure of 12.0 MPa on pipes of 48 in. in diameter and 0.720 in. in wall thickness of API. grade X 70, made with both controlled rolled steels and quenched and tempered steels. The arrestability of the pipes for the propagating shear fracture can be evaluated by Charpy absorbed energy and is not influenced by the existence of separation. The critical Charpy energy for arresting the shear fracture depends on the distance in which the crack should be arrested, and this phenomenon is well explained by solving the equation which governs the change in the crack velocity. Under the present test condition, the critical Charpy energy is 180 J for the arrest within one pipe length and 130 J for the arrest within two pipe length.

著者

梅本 実 田村 今男

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.3, pp.383-392, 1982-03-01

著者

日本鉄鋼協会

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.42, no.5, 1956-05-01

著者

記載無し

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.48, no.10, pp.1125-1226, 1962-08-25

著者

粉川 博之

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.77, no.12, 1991-12-01

著者

山中 啓充 福島 克治 森脇 三郎 守脇 広治 桜谷 敏和 大沼 啓明

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.4, 1982-03-05

著者

森 一美

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.50, no.13, pp.2259-2260, 1964-11-01

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A rate equation has been derived for the gaseous reduction of iron ore pellets on the assumption that both chemical reaction and diffusion contribute to the overall reduction rate. It was assumed that there is no resistance of diffusion through the boundary layer outside the pellet and chemical reaction takes place only at the interface between reduced and unreduced layers. Under these conditions the rate equation is given as follows : (1/k)[1-(1-R)^<1/3>]+(r_o/D)[1/2-R/3-(1-R)^<2/3>/2]=(C_o-C_e)t/r_od_o where R : fractional reduction k : chemical reaction rate constant t : time D : effective diffusion coefficient r_o : radius of pellet C_o : gas concenration in the bulk gas phase d_o : density of pellet C_e : equilibrium gas concentration The two terms on the left side of the equation show the relative contribution by chemical reaction and by diffusion of the reducing gas through the reduced metal layer. It was found that the equation agrees with experimental data except towards the completion of reduction. Equation for the reduction controlled either by chemical reaction or by diffusion could be derived as the limitimg cases of the above-mentioned equation.

著者

渡辺 雅俊 井口 〓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.81, no.6, pp.613-618, 1995-06-01

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A statistical thermodynamic model, cell model, has been attempted to represent the hydroxyl capacities of some molten silicates and molten aluminates. The slag systems discussed were CaO-SiO_2, CaO-Al_2O_3 binaries and CaO-SiO_2-MgO, CaO-Al_2O_3-MgO and CaO-SiO_2-Al_2O_3 ternaries. The cell model is based on the description of the liquid in terms of cells composed of an oxygen anion surrounded by two cations (i, j). In addition to binary parameters, W_<ij> and E<ij> a new parameter, W′_<Hi> was introduced into the cell model for representing the hydroxyl capacity. Here, W′<Hi> is free energy of formation of dilute H-O-i cell. The hydroxyl capacities calculated by the model agreed with the experimental data over the wide range of slag composition and temperature. A good correlation between W′<Hi> and free energy of formation of hydroxide was confirmed. Therefore, the cell model with the new parameter W′<Hi> is considered to be applicable to predict the hydroxyl capacities of multicomponent slags.

著者

太宰 武生 大久保 尚武 大浜 光正 広田 惣一 伊福 享 貞方 良文

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.67, no.13, 1981-09-10

著者

石田 次雄 高藤 英生 江藤 哲雄

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.67, no.13, 1981-09-10

著者

西野 知良 本間 浩夫

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.56, no.7, pp.859-868, 1970-06-01

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The dependence of the yield stress of mild steel at low temperatures on grain size, strain rate and temperature was studied mainly by compressive deformation test. (1) The following equation relating strain rate (ε), temprature (T) and frictional stress (σ_t) of Petch equation was obtained ; ε=Cσ^n_t exp(-E/RT) This is applicable when σ_t is in the range of 8.7 to 28.2kg/mm^2. Strain rate exponent n and activation energy E are constant, both being independent on temperature, strain rate or stress. Above this stress level, n becomes larger but E is substantially invariable. (2) According to the study on BCC metals, it can be said that they behave in a similar manner to mild steel. That is, n is in the range of 7 to 9, being constant and specific to BCC metals, and in addition, E is approximately proportional to an energy of μb^3, where μ is the shear modulus and b the Burgers vector. (3) The relations between strain rate, grain size and ductile-brittle transition temperature were studied by using the above equation, and the calculated temperatures are generally in accordance with the measured values.

著者

辻 伸泰

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.88, no.7, pp.359-369, 2002-07

被引用文献数

9

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Recent progress in grain refinement of steels was overviewed. After energetic research works since middle 1990's including big national projects in Japan, ultrafine grained steels whose mean grain size is smaller than 1 μm have been realized. There are principally two ways to obtain ultrafine grained structure in steels: the ultimate thermomechanical processing using various kinds of phase transformation in steels and the intense straining using a kind of recovery and recrystallization phenomena. Large amount of plastic strain is the key factor in both case. Microstructural characteristics and mechanical properties ofthe ultrafine grained steels were summarized. Future advance and prospect in the ultrafine grained steels was discussed.

著者

梶 晴男 木下 修司 林 登

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.58, no.13, pp.1759-1774, 1972-11-01

著者

三村 宏

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.58, no.13, pp.1822-1831, 1972-11-01

著者

荒木 透

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.58, no.13, pp.1753-1758, 1972-11-01

著者

高村 久雄 近藤 登

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.66, no.7, pp.875-881, 1980-06-01

著者

川並 高雄 山本 普康 大木 孝 西山 泰行 市田 弘三郎 村上 靖

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.13, 1983-09-03

著者

寺門 良二 岩佐 勝 安沢 典男 吉田 言 山口 進 山本 充文

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.69, no.13, 1983-09-03