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

著者

北村 隆行

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.76, no.8, pp.1400-1401, 1990-08-01

著者

大黒 竹司 森 玄三 林 登 矢倉 林之助 福島 章

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.11, pp.1795-1797, 1964-09-01

著者

大黒 竹司 飯浜 宇一郎 林 登 矢倉 林之助 自在丸 二郎

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.51, no.4, pp.867-870, 1965-03-01

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.4, 1995-04-01

著者

久保 善博 佐藤 豊 村川 義行 久保田 邦親

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.83-90, 2005-01-01

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The Japanese traditional steel making method which manufactures steel "Kera" or plg iron "Zuku" from iron sand and charcoal is so called "Tatara" steel making process The influence of the loading ratio of iron sand to charcoal on the "Tatara" steel making was investigated In the case of the loading ratio is equal to 1, high carbon steel "Kera" was produced at the high yield accompanied with viscous slag "Noro" In the meantime, in the case of the loading ratio is equal to 15, the carbon content of the produced steel "Kera" was low at the low yield accompanied with a lot of low viscous slag "Noro" In the case of low loading ratio, so called "light charge", iron sand was well deoxidized and carbonized in the furnace and became to high carbon steel "Kera" at the high efficiently In that case, the slag "Noro" became to viscous one because of the reduction of FeO content on the contrary, in the case of high loading ratio, so called "heavy charge", the deoxidization of iron sand was insufficient and most of iron sand was discharged as a slag "Noro" to the outside of the furnace As the result, produced steel "Kera" yield lowered During the "heavy charge" operation, the composition of the slag "Noro" became FeO-rich, and then the fluidity of the slag "Noro" increased It was clarified that the controlling of the loading ratio was an important factor which affected both to the quality and productivity of steel "Kera" and the fluidity of slag "Noro" on "Tatara" steel making process

著者

谷山 巖

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.26, no.7, pp.511-520, 1940-07-25

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The steel made from sponge iron and loop (Luppe) is generally thought superior to that from steel scraps, because of the former's virgin or fresh quality. However, even such steel wiht virginity, may loose the fresh quality when re-melted. Steel manufacturers are used to add some necessary alloying elements to the base iron, which has not contained any additional elements, in order to obtain the expected result, while they cannot refine such materials as steel scraps as they are which contain the ordinary steel components alone and consequently reveal no chemical reaction. It is suggested that the superiority of sponge iron is, in reality, due to the absence of any other steel mixtures, and not due to the virginity. It is necessary to follow a "dynamic" method in refining the sponge iron with a considerable amount of carbon. The good result would not be obtained by following the ordinary method of refining, even in case where only a little quantity of carbon is present. When steel scraps are used as the original material, the existing components other than iron should be removed first by means of oreing and then necessary elements may be added.

著者

平賀 譲

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.7, no.5, pp.四〇七-四三六, 1921-05-25

著者

堀川 一男

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.35, no.10, pp.355-359, 1949-10-25

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The purpose of this study was to save fuels, equipments and labours reguired for full annealing of low alloy steel thick forgings. In this first report, theory of isothermal annealing and fundamental studies carried out on small spacimens were given. The steel used was a medium C low Ni-Cr-Cu-Mo steel contg. 0.30∿0.35%C, 0.6∿1.0%Mn, 1.0∿1.8%Ni, 1.0∿1.3%Cr, 0.2∿0.4%Cu and 0.4%Mo. To determine the S-curve of this steel, thermal expansion was measured and microstructure and hardness of specimens quenched after isothermal heating were investigated. The results obtained were summarized as follows : (1) This steel can be full annealed within 5 hrs. if its supercooled austenitic state is kept and transformed at 660∿670℃, 6 hrs. at 650∿680℃ and 9 hrs. at 640℃ (2) The isothermally annealed steel is satisfactorily softened and its Brinnel hardness number is below 200. (3) The microstructure of the isothermally annealed steel is quite different from that of the ordinary annealing, but the time required for heating in the quenching operation those steels was not varied between these two different annealing structures. (4) That different annealing process has no influence on the mechanical properties of the steel after hardening and tempering.

著者

小平 勇

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.6, pp.548-562, 1932-06-25

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Basic open-hearth ingots are classified in two different kinds so-called rimmed steel ingot and killed steel ingot. In my opinion the variations of these ingots are principally affected to the condition of the stirring action caused by the evolution of the gas during the solidifging process. Their characteristics are briefly pointed out and some of the experiments are suggested concerning to the heterogeneity of chemical elements, crys allographic struetures, segregations, blow holes, and etc.

著者

高木 眞一 熊谷 正夫 伊藤 裕子 小沼 誠司 下平 英二

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.92, no.5, pp.318-326, 2006-05-01

被引用文献数

6

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The fine particle peening process, which makes particles of several tens microns in diameter impact at high speed, has been adapted industrially to auto motive steel parts or tool steels because the fatigue property is superior to that of a conventional shot peening process. However, microstructural changes obtained from this process have not been fully understood. In this study, microstructural change of JIS-SCr420 carburized steel (HV 7.55 GPa) by the fine particle peening process was investigated comparing with cases of a conventional shot peening and of softer steels. In SEM observation of the carburized steel, although plastic flow was observed in the region from the surface to a depth about 2μm, nanocrystalline structure was not detected. TEM observation revealed that nanocrystalline layer with about 0.5μm in thickness was produced continuously along the surface. In softer steels which hardness below HV 3.72 GPa in this study, nanocrystalline structure was observed as the folded and layered deformation region, which existed locally and discontinuously along the surface. Morphological difference of these nanocrystalline structures is considered to result from surface deformation modes by particles impact. In softer steels, the convex part in considerable uneven surface formed by the impact is folded and imposed into interior region by the repeated impact and developed to nanocrystalline structure. In carburized steel, owing to absence of the considerable unevenness, throughout surface area deformed during the impact and nanocrystalline structure is developed homogeneously and continuously along the surface. In a conventional shot peening condition, nanocrystalline structures were not formed.

著者

酒井 知彦 島津 高英 筑摩 顯太郎 谷野 満 松尾 宗次

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.70, no.15, pp.2049-2056, 1984-11-01

被引用文献数

3

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There are a few reports that Cu sulfides precipitate with the addition of Cu in the grain-oriented silicon steel, but the precipitates of Cu sulfides have not yet been well observed Thus, the observation of the precipitation of Cu sulfides is performed and the metallurgical effects of Cu addition on the grain-oriented silicon steel are studied. (1) With the addition of small amount of Cu, fine particles of (Cu, Mn) _<1.8>S (size 200&acd;500Å) precipitate and inhibition effects of normal grain-growth are enhanced. The distribution of Cu sulfides in hot rolled sheets provides beneficial geometrical situation to grow sharp Goss grains selectively during the secondary recrystallization. (2) In the texture at the subsurface of hot rolled sheets, {110}(001) grains are increased, and after decarburization, {554}<225^^-> and {110}<001> grainsare increased, on the other hand {100}<001> grains are decreased. These make secondary recrystallization easy. (3) When small amount of Cu is added and cold rolling reduction is increased from 55% to 65%, there are improvements of magnetic properties of grain-oriented silicon steel.

著者

郡司 好喜

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.60, no.13, 1974-11-01

著者

浜田 尚夫

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.72, no.15, pp.1991-2000, 1986-11-01

被引用文献数

1

著者

宮崎 富夫

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.78, no.7, pp.1238-1249, 1992-07-01

被引用文献数

1

著者

水上 秀昭 村上 勝彦 宮下 芳雄

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.63, no.11, 1977-09-05

被引用文献数

2