著者

永野 治

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.64, no.5, pp.659-663, 1978-04-01 (Released:2010-02-22)

被引用文献数

3 4

著者

蒔田 宗次

出版者

The Iron and Steel Institute of Japan

雑誌

鐵と鋼 (ISSN:00211575)

巻号頁・発行日

vol.24, no.12, pp.1106-1112, 1938-12-25 (Released:2009-07-09)

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Participated in work of the party engaging specially in the repair of Japanese swords in the front, the author observed the superiority of Japanese swords in the light of the present Sino-Japanese fighting.It is a well-acknowledged fact that the Japanese sword has an excellent sharpness. Its splendid effect has invariably been shown in action at the present crisis, there being many instances to be quoted from numerous exploits in the actural occasions.A large number of Japanese swords being used in the front, sword makers are naturally very busy at present.We know the physical effect of the Japanese sword from its sharpness as well as the user's skill. Besides the most important matter is our strong faith for the Japanese sword. Consequentty, the mental effect of it against the enemy is very powerful with the action of the "Japanese spirit" in it.Therefore, we observe the Japanese sword not only materially but also spiritually. In short, the Japanese sword is considered to be a spiritual material, which stands to guard strongly and to prosper eternally the Land of Our Mikado.

出版者

一般社団法人 日本鉄鋼協会

雑誌

鐵と鋼 (ISSN:00211575)

巻号頁・発行日

vol.27, no.8, pp.620-636, 1941-08-25 (Released:2009-07-09)

著者

松本 年男 安井 健一 津森 芳勝 西村 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.72, no.5, 1986-03-04

著者

佐々木 直彦 桃野 正

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.93, no.12, pp.792-798, 2007-12-01 (Released:2009-02-13)

参考文献数

6

被引用文献数

3 3

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The Japanese sword has excellent strength-toughness balance given by two traditional processes. One process is compounding of inner tough iron and outer strong steel. And the other process is cooling-rate control quenching by using thickness of clay-coating before quenching. However, it is a precondition for acquiring high strength-toughness that carbon content of sword parts are regulated in proper quantities. Carbon content of sword parts is very important and controlled under forging process which contains TSUMI-WAKASHI (forge-welding piled steel chips) work and fold-forging.Therefore, changes in carbon content of TAMA-HAGANE steels and carbon steels under traditional forging process were investigated in this study. Changes in carbon content depended on enclosing decarburized or carburized surface in steel as forge-weld interface. Total changes in carbon content were proportional to total layers of included surface in steel. Changes in carbon content per one forge-welded layer. “d (mass%/layer)” was ruled by carbon content of raw materials “C0 (mass%)”. When C0 is over 0.2 mass%, carbon content of forged steel is decreasing and the more C0, the more |d |. C0 is under 0.2 mass%, carbon content is increasing. The mass of forged steels is 4% increasing per one fold-forging cycle, but d is not affected by changes in mass of them.

著者

飯田 賢一

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.73, no.7, pp.751-760, 1987-05-01 (Released:2009-06-19)

参考文献数

26

著者

池田 義雅 高村 正人 箱山 智之 大竹 淑恵 熊谷 正芳 鈴木 裕士

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

pp.TETSU-2017-080, (Released:2018-02-05)

参考文献数

17

被引用文献数

8

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Neutron engineering diffraction is a powerful technique which provides the information of the micro structure of steels in bulk-average, while X-ray diffraction or Electron backscatter diffraction can provide information only from the surface layer. However, such measurement using neutron diffraction is typically performed in a large facility such as a reactor and a synchrotron, while a compact neutron source has never been used for this purpose. Authors have recently developed a neutron diffractometer installed in Riken Accelerator driven compact Neutron Source (RANS) and succeeded in the measurement of texture evolution of a steel sheet. In this study, we made an attempt to measure the volume fraction of retained austenite by RANS. Background noise was carefully eliminated in order to detect as many diffraction peaks as possible with low flux neutrons. The volume fraction was estimated by Rietveld analysis. The accuracy of the measurement result was discussed by comparing with those obtained by a large neutron facility (J-PARC TAKUMI). The volume fraction obtained by RANS with reasonable measurement time, i.e. 30-300 min, showed only 1-2% discrepancies with those obtained in J-PARC. These comparisons suggest that neutron diffraction by RANS is capable of quantitative analysis of the volume fraction of crystal phases, showing the possibility of practical use of an in-house compact neutron source in the industry.

著者

高瀬 孝次

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.18, no.12, pp.1333-1374, 1932-12-25

著者

久保田 俊輔 峯田 元治 安井 純一 中江 秀雄

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.97, no.11, pp.566-571, 2011-11-01 (Released:2011-11-01)

参考文献数

19

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The metallurgical macro- and micro-structure, and the residualstress of the Japanese matchlock gun, fabricated at the late Edo period, have been investigated with an optical microscope, an SEM, an EPMA and an X-ray residual stress meter for estimating the fabricating process and their materials. This gun was fabricated by Udonbari (in Japanese) process, which is similar to that of the Russell's method, tubes was created by the joining together opposite edges of a flat iron strip with an iron core bar. The joining line was wavy. Their residual stress was mainly compressive and the values were from 180 to 280 MPa in the longitudinal direction and from 240 to 380 MPa at the transverse direction.The gun was made of low carbon steel with equiaxed ferrite grains; their grain size was mainly 10 μm partly with 100 μm and exceptionally more than 1000 μm grains. Moreover, we find the special banded structure, consisted of fine ferrite grains bands and large ferrite grains bands.The firing part was fabricated by the joining of five parts for getting the L-shape hole. The female screw was made by forging; therefore the shape was tapered screw and the male screw was cut from a low grade steel bar, confirmed by their macro-structure.

著者

小日山 直登

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.25, no.12, pp.1119-1125, 1939-12-25

著者

鹿毛 勇 坂本 義仁 高阪 廣作 藤田 栄

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.89, no.1, pp.188-195, 2003-01-01 (Released:2009-05-29)

参考文献数

26

被引用文献数

4 4

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Atmospheric corrosion on the inhabited steel framed house was investigated with Fe-Ag galvanic type atmospheric corrosion monitoring (ACM) sensors. As the environmental conditions, temperature, humidity and currents of the ACM sensors were continuously measured in several parts of the house for five years. Corrosion rates of hot-dip galvanized steel sheet, Zn-5%Al coated steel and 55%Al-Zn coated steel for the light gauge steels were also determined on the basis of exposure tests. Service life of the galvanized steels and dew condensation in the house were discussed.Amount of deposited sea salt influences the corrosion resistance of the coated steels. Under the indoor conditions of the inhabited house, the amount of deposited sea salt was negligibly small. It is difficult to evaluate the corrosion resistance of coated steel sheets using convenient corrosion tests because of too much sea salt.

著者

大塚 真司 多田 英司 西方 篤 藤田 栄 水流 徹

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.103, no.1, pp.27-35, 2017 (Released:2016-12-31)

参考文献数

22

被引用文献数

4 13

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In this study, hydrogen absorption behavior of steels on a vehicle during driving and parking in deicing-salt-spraying areas was investigated by using temperature-compensating hydrogen absorption monitoring system. During the driving of the vehicle in the areas, hydrogen permeation current of steel was increased due to picking up of salt water from the road when the road was wet. On the other hand, during the parking of the vehicle, the magnitude of the hydrogen permeation current were indicated that the hydrogen permeation current in the automobile driving environments is related to both driving states of a vehicle and environmental conditions such as temperature and relative humidity.

著者

飯田 賢一

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.66, no.5, pp.573-577, 1980-04-01 (Released:2010-01-18)

参考文献数

17

著者

渡辺 ともみ

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.91, no.1, pp.108-115, 2005-01-01

参考文献数

34

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The traditional steel manufacturing (Tatara) of Japan which developed in the early modern times fell into the decline in the Meiji Period. On the other hand, because it is being made by reducing iron sand with charcoal, the amount of phosphorus and sulfur of Tatara iron is low. Therefore it was adopted as a raw material of the alloy steel at Naval Arsenal of the Meiji latter period. The purpose of the main subject is to explain that process.<BR>The quality which the navy demanded was limited to the speck of the low phosphorus. Then, the navy never tried to admit the cost which corresponded with that quality. The makers of Tatara iron had efforts to cope with a naval requirement. But, they had to give up their Tatara business suddenly. That was because naval warship manufacture stopped observing Washington disarmament treaty. They advanced all together to charcoal industry after that.

著者

谷口 良一 芹沢 保文

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.68, no.15, pp.2086-2094, 1982-11-01 (Released:2009-06-19)

参考文献数

10

被引用文献数

3 3

著者

増村 拓朗 谷口 大河 浦中 祥平 平嶋 一誠 土山 聡宏 丸山 直紀 白幡 浩幸 植森 龍治

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.106, no.11, pp.835-843, 2020 (Released:2020-10-31)

参考文献数

22

被引用文献数

1 7

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Electrical resistivity of low-carbon martensitic steels was measured to estimate the carbon concentration in solid solution. Since electrical resistivity is influenced not only by solute carbon but also by substitutional elements, lattice defects and second phase, the effects of these factors need to be subtracted from total electrical resistivity, in order to obtain the accurate solute carbon concentration by this method. As a result, the effects of dislocations and grain boundaries were much smaller than that of solute elements, being only 1 - 2% of the measured electrical resistivity, in martensitic steel. On the other hand, substitutional elements and retained austenite were found to be significantly effective. By subtracting these effects from the measured value, the change in electrical resistivity due to solute carbon, Δρsol.C, could be formulated as a function of the carbon concentration in solid solution of martensite, Csol, as follows:Δρsol.C [mΩmm] = 0.25 × Csol [mass%]The estimated solute carbon concentration was confirmed to correspond to the directly measured value by atom probe tomography.

著者

福居 康 甲田 満 広瀬 祐輔

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.77, no.7, pp.939-946, 1991-07-01 (Released:2009-06-19)

参考文献数

21

被引用文献数

5 5

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Spangles formed at hot-dip galvanized steel were classified and the distribution of Pb and Al, which were impurity and additional element respectively in molten zinc bath, on the spangle surface was investigated. The hot-dip galvanized Al-killed steel was produced with gas reduction type hot dipping testing aparatus in which steel sheet was cleaned by heating in reducing atmosphere and dipped into molten zinc bath which contained 0.25 wt%Pb and 0.17 wt%Al. X-ray Laue method was used for determination of crystal orientation and EPMA was used for the measurement of distribution of Pb and Al at the spangles.The main results of the study are follows:(1) The spangles are classified from the point of view of the crystal orientation and the appearance into the seven types as follows, Fern I, Fern II, Mirror, Frost, Half fern, Feather, Triangle.(2) The direction of the straight boundary of the spangles coincide with the projected direction of preferred crystal growth orientation (<1010>) on the spangle surface.(3) Spangles are classified into α type and β type from the point of view of the inclination of c-axis (<0001>). The c-axis of α type spangle is inclined to the straight boundary of the spangles and the c-axis of β type spangle is inclined to the reverse direction.(4) The amounts of Pb and Al at the spangle surface vary with the types of the spangle.(5) The spangle with the larger amounts of Pb and Al has less brilliance.

著者

郡司 好喜

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.80, no.7, pp.N371-N385, 1994-07-01 (Released:2009-06-19)

参考文献数

29

被引用文献数

1 3

著者

松本 建速

出版者

The Iron and Steel Institute of Japan

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.91, no.1, pp.55-61, 2005-01-01 (Released:2009-06-19)

参考文献数

14

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To identify the process of iron production, some indicators are proposed by using the chemical components of excavated slag. Especially, the ratio of Ti/Fe and V/Fe are useful for this purpose. All indicators, however, are not always appropriate for the distinguishable procedure between bowl-shaped slag and other slag. It is not yet fundamentally explained that major elements of iron-making slag caused from any materials.In this article, ten major elements which are constituent of iron-making slag as Silicon (Si), Iron (Fe), Aluminium (Al), Titanium (Ti), Manganese (Mn), Magnesium (Mg), Calcium (Ca), Sodium (Na), Potassium (K) and Phosphorus (P) are considered by using the released analytical data. Every element has been normalized against Si, and the correlation diagrams are plotted. The correlation diagram with Si can be distinguished as 3 groups.( 1 ) Elements Al, Ca, Na, K and P have positive correlation with Si.( 2 ) Elements Ti, Mn, and Mg do not correlate with Si.( 3 ) Fe has negative correlation with Si.Elements of group (1) as Ca, Na, K and P increase the content in any slag during the smelting, refining and forging processes. Thus, it is obvious that these four elements can not be utilized for the distinguishable procedure of ancient iron-making slag.On the other hand, elements of group (2) as Ti, Mn and Mg are appropriate to be indicators for the distinguishable procedure of two types slag between forging slag (sometimes in refining process) and other slag (normally in smelting process). On the basis of concentration of the 3 elements, it is indicated that bowl-shaped slag is formed in forging (sometimes in refining), and other slag is done in smelting.As the result of this study, the ratio of element as Mn/Ti, Mn/Si, Mg/Ti and Mg/Si are suggested to be useful as indicators for the distinguishable procedure between bowl-shaped slag and other slag.

著者

的場 幸雄

出版者

The Iron and Steel Institute of Japan

雑誌

鐵と鋼 (ISSN:00211575)

巻号頁・発行日

vol.20, no.12, pp.837-847, 1934-12-25 (Released:2009-07-09)

参考文献数

38

被引用文献数

3

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In the main part, author treats the equilibrium of Fe-C-O2-system at steel making temperatures by melting carbon and oxygen bearing iron in the gas stream of carbon mono-oxide and dioxide mixture. As the results of his experiment, it was proved that the oxygen content of the molten steel in equilibrium with the gas phase, is proportional to the ratio pco2/pco, and carbon content to p2co/pco2. On these accounts, he proposed that the two equilibriums, FeO(Fe)+CO=Fe+CO2 and C(Fe)+CO2=2CO, should be considered simultaneously as the carbon-oxygen equilibrium in steel making process instead of FeO(Fe)+C(Fe)=Fe+CO as was usually accepted. Further he constructed also the equilibrium diagram of Fe-C-O2-system qualitatively in the region of molten steel.As an appendix of his main paper, he described the hydrogen reduction method of oxygen determination in iron and steel. Some remarkable points of his method of determination are in the treatment of reduction products, H2O, CO2 and CO. Here H2O was absorbed by P2O5 and CO2 by soda lime as usually, CO is oxidized by I2O5 to CO2 selectively and after retaining free iodine with metallic copper chips, secondary formed CO2 absorbed by soda lime and weighed.