著者
高瀬 孝次
出版者
The Iron and Steel Institute of Japan
雑誌
鐵と鋼 (ISSN:00211575)
巻号頁・発行日
vol.22, no.2, pp.107-120, 1936-02-25 (Released:2009-07-09)

Owing to the marked increase of aero-engine power, number of revolution, compression ratio, etc., crankshaft should inevitably biar the vibrational and duplicated over-stresses. The crankshaft should, therefore, not only be of the best chemical composition, most properly heat-treated, the latest metallurgical procedure being applied, but also of the most perfect design, in addition to the minimum weight and size.The writer has published a part of this investigation in the "Tetsu To Hagane" Vol. XIX, No.4 In this paper, in order to select the most suitable steel for the future, the notch effect in regard to the endurance properties and the influence of heat-treatment of these steels have been investigated.An investigation of crankshaft steel on the relation between the mechanical test results and the endurance properties by fatigue test have also been executed, and the writer has introduced a new method for determing the endurance limit in stead of laborious fatigue test.As a conclusion, the writer has suggested future requirements for the aero-engine crankshaft steel, considering all the facts above mentioned.
著者
河村 驍
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.21, no.6, pp.373-383, 1935-06-25

The development and progress of the iron and steel industry during last ten years is reviewed, giving frank criticism upon the policies carried during the period and concluding with future prospect of the industry. The statistical review of production, Consumption and import of finished as well as raw materials is also given.
著者
永田 和宏
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.84, no.10, pp.715-720, 1998 (Released:2009-06-19)
参考文献数
7
被引用文献数
3

Tatara was used to be a traditional process to produce solid steel, so called "Kera", and/or liquid pig iron, so called "Zuku", from iron sand and charcoal using the box type furnace with blowing cold air intermittently. A modified Tatara furnace has been examined on the production mechanisms of "Kera". Temeratures and oxygen partial pressures in the furnace were measured by means of thermocouples and oxygen sensors with solid electrolyte of zirconia. Iron sand and a piece of "Kera" produced in the bottom of furnace were sampled and analyzed chemically or by a electron probe micro analyser. Iron sand is reduced above tuyere and absorbs carbon on fired charcoals in front of the tuyere at about 1350°C. Many small balls of liquid steel with different carbon content were found in molten slag pool of FeO-saturated silica, so-called "Noro", and cohere each other to grow into a bloom. The characteristics of Tatara steelmaking process are low temperature for carbon absorption of steel at about 1350°C, high oxygen potential in the molten slag of FeO-saturated silica and hypo-eutectic carbon content in steel.
著者
内藤 誠章 武田 幹治 松井 良行
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.1, pp.2-30, 2014 (Released:2013-12-31)
参考文献数
218
被引用文献数
9 6

The modern blast furnace operation at integrated steel works in Japan has started in 1901 by the first blown-in of Higashida No. 1 blast furnace in Yawata Works, while a 150 years history of Japanese steel industry has dated back to the first western blast furnace built by T. Ohashi in 1857. The steel industry has been supporting the Japanese economy as a key industry which supplies base materials for social infrastructure and developments throughout the pre and post war periods.After the recovery period from the war destruction, Chiba Works of Kawasaki Steel Corp., were built and started its operation in 1953 as the first integrated steel works in Keiyo Industrial Region after the war. During the rapid growth period, many coastal steel works equipped with a large blast furnace more than 3000m3 and some of 5000m3 were built for the efficient marine transportation of raw materials and steel products. Most advanced technologies, high pressure equipment, stave cooler system and bell-less charging system etc., were introduced, improved and has risen to the top level in the world with low reducing agent ratio (RAR), energy saving and long service life of a blast furnace and coke ovens.Energy shift from oil to coal by the oil crisis, cost oriented operation design and technology were tackled and the hot metal of about 80 million tons is manufactured with 27 blast furnaces including over 5000m3 large scale blast furnaces in 2012. During this period, our industry has faced many economical and social pressures of high exchange rate of yen, oligopoly of mining market, global warming problem, and surge of iron ore and coal prices by the rapid growth of the BRICs. We have kept our competitive positions by developing advanced technologies on pulverized coal injection, extended use of low cost iron resources, recycling for environment and CO2 mitigation technologies.Prospects of ironmaking technologies for other decades are discussed by reviewing various papers published and looking back the history of ironmaking developments during the last 100 years.
著者
絹川 武良司
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.3, pp.163-174, 1939-03-25
著者
西山 幸夫
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.69, no.10, pp.1257-1265, 1983-08-01 (Released:2009-06-30)
参考文献数
27
被引用文献数
1
著者
佐々木 直彦 堀井 胤匡 藤原 幹男 斎藤 英之 三澤 俊平
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.86, no.1, pp.45-50, 2000-01-01 (Released:2009-06-19)
参考文献数
13
被引用文献数
3

Micro-strucure, micro-hardness and micro-absorbed impact energy in the Japanese sword have been investigated to clarify excellent mechanical properties of the Japanese sword. The Japanese sword specimen used in the present research has been made by using TSUKURIKOMI process which combines four kinds of steels; HAGANE (edge), SHINGANE (core), MUNEGANE (back) and KAWAGANE (side) steels, with different carbon contents. By this process, HASAKI (edge) side becomes high carbon steel and MUNE (back) side possesses low carbon steel. The cooling velocity in quenching of the Japanese sword is controlled by TSUCHIOKI treatment which coats the clay thinner in the HASAKI side and thicker in the MUNE side. The HASAKI side is quickly cooled and the MUNE side is slowly cooled. The micro-structure in the HASAKI side shows martensite while the MUNE side shows the coexist structure of ferrite and pearlite. The HASAKI side has a lower value while the MUNE side shows a higher value in the micro absorbed impact energies obtained with the 1.0 and 0.7 mm square miniaturized specimens. It has been shown clearly that the TSUKURIKOMI and the TSUCHIOKI processes give the excellent gradated balance of strength-toughness to the Japanese sword.The ORIKAESHI (folding) forging has an effect both on the carbon content and as quenched hardness in HAGANE steel. The most suitable times of ORIKAESHI cycles which adjust to the carbon content of 0.55-0.60 mass% and hardness of 800HV1 have been determined to be thirteen times. These times of ORIKAESHI cycles correspond to the optimum traditional cycles lying between twelve and fifteen times. The present research from the viewpoint of the metallurgy sheds light on the empirical rule in the traditional Japanese sword processing.
著者
藤尾 慎一郎
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.91, no.1, pp.11-15, 2005-01-01 (Released:2009-06-19)
参考文献数
12
被引用文献数
1

This paper focuses on the influence what the AMS-carbon 14 age method attains to the history of the iron in the Japanese Islands.The research team in National Museum of Japanese History makes a clear that the Yayoi period began in 10 Cen. cal BC. However, there was a problem in this.It is iron. If the Yayoi period has started in the 10th Cen. BC, it means that the ironware in Japanese Islands had spread early rather than it spreads in China.The research team reexamined the ironware excavated from Magarita site in the Fukuoka Pref. considered to be the oldest ironware in Japan. Consequently, the excavation situation was indefinite and it turned out that we cannot specify the time to belong.Furthermore, 36 ironwares in the initial and early Yayoi were also already found by that time cannot be specified except for two points. Therefore, it turned out that Japanese ironware appeared in the 3rd century of B.C. What does this mean?Although it had been thought that the beginning of agriculture in Japan and the appearance of ironware were simultaneous, it turned out that agriculture has appeared early about in 700 years. Therefore, it became clear that agriculture of Japan started at the Stone Age.
著者
富永 在寛 八塚 健夫 庄野 四朗
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.46, no.1, pp.7-11, 1960 (Released:2012-07-12)
参考文献数
5

To measure the wearing state of a blast-furnace brick-work during its operation, a test method using a radioactive isotope (Co60) was investigated. In this report, some basic investigations which include the measurement of absorption coefficients of the blast furnace construction materials, determination of the burying amounts of Co60, and experiments with a brick-work model are described.
著者
杉本 惣吉
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.3, no.9, pp.九九〇-一〇〇五, 1917-09-25