著者

YI

出版者

一般社団法人 日本鉄鋼協会

雑誌

鐵と鋼

巻号頁・発行日

vol.2, no.5, pp.534-540, 1916

著者

俵 國一 本間 清人

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.6, no.2, pp.171-189, 1920-02-25 (Released:2009-07-09)

著者

山本 光夫 福嶋 正巳 劉 丹

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.3, pp.159-164, 2011-03-01 (Released:2011-03-01)

参考文献数

16

被引用文献数

16 17

---

Barren grounds in coastal area are serious problems in Japan and throughout the world. Although several factors have been proposed to account for barren grounds, we have especially focused on lack of dissolved iron for restoring seaweed beds. It has been developed a method that the mixture of steelmaking slag and humus materials, such as composts, were supplied in seawater. A concentration of dissolved iron can be increased by using the method, since complexes, iron-humates, are produced from iron in steelmaking slag and humic substances in compost. In this study, we evaluated the effect of humic substances in this method for increasing dissolved iron concentration. A laboratorial iron elution test by using actual seawaters was attempted. Three kinds of samples for iron elution, only steelmaking slag, only humus materials, and a mixture of steelmaking slag and humus materials, were prepared. The change of iron concentration in each small tank had been monitored. We found that iron elution rate in the case of the mixture of steelmaking slag and compost was faster than that in the case of only steelmaking slag. Furthermore, it was expected that the characteristic of the structure of humic substances were related to increase iron elution from steelmaking slag. The mixture of steelmaking slag and humus materials was more effective not only for increasing iron concentration in seawater and but also for extending the life time of Fe elution.

著者

有山 達郎

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.105, no.6, pp.567-586, 2019 (Released:2019-05-31)

参考文献数

81

被引用文献数

4 16

---

Global warming has been regarded as a crucial issue in every industry. Since long term global goal was set on the basis of Paris Agreement, a considerable evolution toward CO2 mitigation in 2050 is desired even in steel industry. Until now, many various technology developments were carried out in the ironmaking area; however, the innovative progress beyond the past progressive developments is required to attain the long-term goal in 2050. This review focuses on the current technology development on CO2 mitigation to date and the design of an ambitious ironmaking process for the future. In particular, the directions for low carbon and decarbonization are discussed from the viewpoints of technological aspects and the comprehensive consistency with sustainability in steel industry. Moreover, the perspectives on CCU (CO2 Capture and Utilization) and hydrogen ironmaking process based on the renewable energy aiming for carbon direct avoidance are described.

著者

鈴木 聡 宮楠 克久 佐藤 嘉洋 菊地 靖志 川上 洋司

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.100, no.8, pp.1021-1028, 2014 (Released:2014-07-31)

参考文献数

17

被引用文献数

2 4

---

Antimicrobial ability of Cu contained stainless steels was investigated. Antimicrobial ability increased with elute fraction of Cu ion from stainless steel surface into antimicrobial test medium. It is necessary to promote eluting fraction of Cu ion, that is, to achieve giving antimicrobial ability to Cu contained stainless steel that sub-micron order or larger size ε-Cu phases are dispersed in stainless steel, surface of stainless steel has high electrode potential and dissolved oxygen exist in the test medium.

著者

向井 滋

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.71, no.6, pp.633-644, 1985-04-01 (Released:2009-06-19)

参考文献数

18

被引用文献数

3

著者

牧 正志 古原 忠 辻 伸泰 森戸 茂一 宮本 吾郎 柴田 曉伸

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.100, no.9, pp.1062-1075, 2014 (Released:2014-08-31)

参考文献数

72

被引用文献数

24 30

---

After ausforming appeared as the first thermomechanical processing of steels in the first half of the 1960 s, various thermomechanical processings have been developed for the improvement of mechanical properties over the last fifty years. Their application was mainly to martensitic steels in the 1960 s such as ausforming and TRIP, and moved to ferrite (+ pearlite) structures by the development of controlled rolling and accelerated cooling of HSLA steels in the 1970~1980 s. However, recently, interest has returned to martensite (and also bainite) because of the demand for higher strength, and the ausforming and TRIP have been revived and successfully applied to commercial practice. Very recently, severe plastic deformation (SPD) is the focus of attention as a new method of producing a very fine-grained structure with grain size of less than 1 μm. By the application of SPD, dynamic phenomena such as dynamic recrystallization and dynamic ferrite transformation occur in the process. We need more systematic studies on such phenomena for the development of new type of thermomechanical processing in steels.

著者

李 松杰 秋山 英二 篠原 正 松岡 和巳 押川 渡

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.99, no.11, pp.651-658, 2013 (Released:2013-10-31)

参考文献数

42

被引用文献数

5

---

Electrochemical hydrogen permeation tests of pure Fe sheets rusted by cyclic corrosion test (CCT) and atmospheric exposure were carried out under controlled temperature and humidity to investigate the influence of atmospheric corrosion on the hydrogen entry behavior. The hydrogen entry into the Fe specimens rusted by CCT increased under wet condition, and the hydrogen entry was increased with the CCT cycle number. During drying process after the wetting, hydrogen entry was further enhanced and a peak of hydrogen current was observed. The peak hydrogen permeation current tended to increase with the growth of rust layer, and the peak value of the hydrogen permeation current became remarkably higher than that at the highest humidity when the rust layer was relatively thick. Similar enhancement of hydrogen entry into an outdoor-exposed specimen was also observed during drying. Drying process after CCT resulted in an increase in hydrogen content of 5 mm-thick steel specimens measured by means of thermal desorption analysis, indicating the enhancement of hydrogen entry during drying process and showing a good agreement with the electrochemical hydrogen permeation test results. It is required to take into consideration the enhanced hydrogen entry to estimate concentration of hydrogen from the environment.

著者

堀川 一男 梅沢 義信 世良 真一 合田 孝純 中島 貞一 足立 彰 水川 清 作井 誠太 中村 正久 布村 成具 大森 正信 藤原 達雄

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.47, no.3, pp.418-430, 1961-03-01 (Released:2010-10-12)

著者

高橋 恒夫 村上 雄 岡田 千里 藤井 則久

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.71, no.15, pp.1818-1824, 1985-11-01 (Released:2010-01-18)

参考文献数

15

被引用文献数

4

---

14世紀,17世紀に作られた日本刀四振を切断し調査する機会に恵まれた.その結果を総括しながら注目された事項を述べると以下のとおりである.1)組成的には炭素以外の元素が極たて少ない高純度炭素鋼である.このことは既に知られていることではあるが,高純度であることが,刃金,芯金,皮金,あるいは棟金それぞれの鍛接性を良くしているのであろう.また,これが耐食性を高たているという報告もある.高純度化はあるいは靱性向上への寄与もあるのかもしれない.現代工業的に生産される鋼とオーダーの違う純度とみなせるもので,現代の工業材料を高純度化することで何か画期的特性が期待できるのではなかろうか.2)非金属介在物の量が極めて多いことに驚かされた.この量は現代の工業用鋼の1~2桁多い量といえよう.このような多量の介在物が存在するにもかかわらず日本刀独特の強靱性を有するということは,すべての介在物を皆無にする必要はなく,ポイントを抑えた生産技術を採用することの重要性を教えられる気がする.3)SHERBYはダマスカス刀,日本刀を範として超高炭素鋼(例えば1.6%C鋼)と極低炭素鋼の複合材を現代工業材料として用いることを提案している,まさに同感である。今回調査した刀のうち,政光,忠廣は明らかに低炭素成分の芯金を高炭素の刃金,皮金で覆つたマクロ的複合材である.一方,忠重の作法はダマスカス刀に似た.高炭素,低炭素材を折り返し折り返し鍛造したものと推定される.高炭素,低炭素組成のそれぞれの特徴を生かした複合材として刀としての特性は似かよつたものであろうが,製法は全くちがつたものと思われる.このような推論も現代の材料技術へ反映させうるひとつのヒントとならないかと考える.

著者

佐藤 成男 黒田 あす美 佐藤 こずえ 熊谷 正芳 ステファヌス ハルヨ 友田 陽 齋藤 洋一 轟 秀和 小貫 祐介 鈴木 茂

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.104, no.4, pp.201-207, 2018 (Released:2018-03-31)

参考文献数

20

被引用文献数

10

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To investigate the characteristics of dislocation evolution in ferritic and austenitic stainless steels under tensile deformation, neutron diffraction line-profile analysis was carried out. The austenitic steel exhibited higher work hardening than the ferritic steel. The difference in the work hardening ability between the two steels was explained with the dislocation density estimated by the line-profile analysis. The higher dislocation density of the austenitic steel would originate from its lower stacking fault energy. Dislocation arrangement parameters indicated that the strength of interaction between dislocations in the austenitic steel was stronger than that in the ferritic steel. This would mainly originate from the difference in dislocation substructures; while dislocation tangle, which can be prompted by the cross slip, was expected in the ferritic steels, highly dense dislocation walls induced by planar glide of dislocations as well as the tangle were expected in the austenitic steel. It was confirmed that the stronger interaction between dislocations in the austenitic steel resulted in the smaller strain field of dislocation. Consequently, the coefficient for the root square of dislocation density in the Bailey-Hirsh equation became smaller in the austenitic steel. X-ray diffraction line-profile analysis was also carried out for the tensile-deformed specimens. The dislocation arrangement parameter evaluated by X-ray diffraction was smaller than that evaluated by neutron diffraction. This would be caused by the difference in the relationship between the loading direction and the scattering vector. On the other hand, the dislocation density evaluated by both methods was almost identical.

著者

友田 陽 関戸 信彰 徐 平光 川崎 卓郎 ハルヨ ステファヌス 田中 雅彦 篠原 武尚 蘇 玉華 谷山 明

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.10, pp.570-578, 2017 (Released:2017-09-30)

参考文献数

31

被引用文献数

15 17

---

Various methods were employed to measure the austenite volume fraction in a 1.5Mn-1.5Si-0.2C steel. It has been confirmed that the volume fractions determined by transmission electron microscopy, scanning electron microscopy/electron back scatter diffraction, X-ray diffraction and neutron diffraction exhibit a general trend to become larger in this order, although the values obtained by X-ray and neutron diffraction are similar in the present steel because austenite is relatively stable. The austenite volume fractions determined by diffraction methods have been found to be affected by the measuring specimen direction, i.e., texture, even by applying the conventional correcting procedure. To avoid this influence, it is recommended to measure both of volume fraction and texture simultaneously using neutron diffraction. Although synchrotron X-ray shows higher angle resolution, its small incident beam size brings poor statistic reliability. The influence of texture cannot be avoided for transmission Bragg edge measurement, either, which must be overcome to realize 2D or 3D volume fraction mapping.

著者

岡田 厚正 山本 恭永 依田 連平

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.9, pp.1186-1192, 1987-07-01 (Released:2009-06-19)

参考文献数

10

被引用文献数

18

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In this study, eighteen kinds of polycrystalline pure metals were provided to investigate the hot-hardness and the indentation creep characteristics at elevated temperatures.The inflection temperatures where the hot-hardness started to decrease quickly with increasing temperature were observed in the range from 0.35 to 0.68 Tm (where Tm was melting point on the absolute scale), and were calculated as 0.49 Tm on the average.However, in some semi-conductor metals such as Si or Ge, the second inflection temperature appeared.The slope of the plot of logHV-logt (t was indentation creep time in sec.) which was defined as "indentation creep rate" was the largest in Mo and the smallest in Si at 0.60 Tm. There was a tendency for the indentation creep rate to increase linearly with increasing homologous temperature, and the slope of the line was the largest in bcc and it became smaller with fcc and cph systems.On the other hand, in the case of semiconductors the indentation creep rate decreased with increasing temperature up to the second inflection temperature.The activation energies of pure metals calculated from the indentation creep were close to those for selfdiffusion.

著者

赤間 大地 土山 聡宏 高木 節雄

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.103, no.5, pp.230-235, 2017 (Released:2017-04-30)

参考文献数

21

被引用文献数

8

---

The dislocation strengthening was estimated by applying the dislocation theory for a Fe-18%Ni alloy which has a lath martensitic structure. The yield stress of highly dislocated metals is dependent on both the friction stress and the dislocation strengthening. Regarding the coefficient of dislocation strengthening, it is governed by the shear modulus of metals. Ni addition plays a role in increasing the friction stress but decreases the shear modulus. This means that the coefficient of dislocation strengthening is smaller in the Fe-18%Ni alloy than pure iron. It was confirmed that the yield stress, which was experimentally obtained in Fe-18%Ni alloy, is reasonably explained by the mechanism of dislocation strengthening, taking the effects of Ni into consideration. On the other hand, in the case of lath martensite with a dislocation density of 2×1015 /m2, it was also found that the effect of Ni addition does not appear on the yield stress because the increment of solid solution strengthening is cancelled out by the decrement of dislocation strengthening.

著者

本村 貢

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.72, no.1, pp.14-21, 1986-01-01 (Released:2010-02-16)

参考文献数

16

著者

前野 圭輝 田中 將己 吉村 信幸 白幡 浩幸 潮田 浩作 東田 賢二

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.98, no.12, pp.667-674, 2012 (Released:2012-11-30)

参考文献数

31

被引用文献数

7 27

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In order to elucidate the mechanism behind the decrease in the brittle-to-ductile transition (BDT) temperature with the addition of Ni, impact tests and tensile tests were performed at various test temperatures from 130K to 320K with Ni added ultra-low carbon steels. The dependence of absorbed impact energy on temperature and the Ni content indicates that the BDT temperature was decreased with the increasing Ni content, which suggests that the dislocation mobility at low temperatures was increased with the Ni content. The yield stress which is also influenced by the dislocation mobility was decreased at low temperatures while it was increased at room temperature with the Ni content. The values of the activation volume and the effective stress were measured at several temperatures, and then the dependence of the activation energy for dislocation gliding on Ni content was obtained by extrapolating the relation between temperature and the multiplication of the activation volume and the effective stress to 0K. The activation energy was found to decrease with the increasing Ni content, which suggests that the dislocation mobility was increased with the addition of Ni. Discrete dislocation dynamics simulation was also performed in order to calculate the dependence of fracture toughness on temperature and the Ni content, and it was clarified that the BDT temperature is decreased by increasing dislocation mobility.

著者

山木 正義

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.45, no.4, pp.438-450, 1959-04-01 (Released:2009-05-26)

被引用文献数

1

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.3, no.11, pp.1163-1185, 1917-11-25 (Released:2009-07-09)

著者

足立 吉隆 新川田 圭介 奥野 晃弘 弘川 奨悟 田口 茂樹 定松 直

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-2015-069, (Released:2015-10-03)

参考文献数

19

被引用文献数

2 6

---

Prediction of a stress-strain curve of ferrite-martensite DP steels was studied by a combined technique of Bayesian inference and artificial neural network. To screen a descriptor to be used for neural network analysis, material genomes such as volume fraction, micro-hardness, handle, and void of martensite phase, and micro-hardness of ferrite phase were examined by Bayesian inference. In a case of small data set, a machine learning method to predict mechanical properties reliably was proposed.

著者

戸髙 義一 戸田 健一 堀井 基弘 梅本 実

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.101, no.10, pp.530-535, 2015 (Released:2015-09-30)

参考文献数

24

被引用文献数

11

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The effect of lattice defects on the tribological behavior for low friction coefficient under lubricant was investigated in the nanostructured steels produced by heavy plastic deformation processes. In the surface-nanostructured SUJ2 bearing steel, the stable tribological behavior with low friction coefficient was observed in the ball-on-disk tests under PAO (Poly-α-Olefin 17) - oil or ester - oil, in comparison with the non-deformed steel. This phenomenon was enhanced by using the lubricant with polarity (ester - oil). In addition, the similar phenomenon was observed in the ULC (ultra-low carbon) steel with high-density of lattice defects (grain boundary, dislocation and so on). This reason seems that the molecules of lubricant interacted strongly with the nanostructured surface due to the deviation of electrons (polarization) at the region with high-density of lattice defects.