... M, Tanaka T, Tsukaguchi Y, Mishima K and Hanao M (2020) Effect of Sulfur in Slag on ... Tanaka T, Goto H, Nakamoto M, Suzuki M, Hanao M, Zeze M, Yamamura H and Yoshikawa T ( ... Tanaka T, Goto H, Nakamoto M, Suzuki M, Hanao M, Zeze M, Yamamura H and Yoshikawa T ( ...
Tópico(s): Fluid Dynamics and Heat Transfer
1998 - Royal Society | Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences
Akira Kishimoto, Masaaki Hanao, Hidetaka Hayashi,
Superplastic-foamed porous ceramics containing numerous closed pores were fabricated. The bending strength of the fabricated ceramics with the smallest pores was close to half that of fully dense ones, even with a porosity of 27%. The smaller pores were introduced selectively between top and bottom surfaces. The resultant dense/porous/dense layered ceramics had a specific mechanical strength greater than that of monolithic dense ceramics.
Tópico(s): Injection Molding Process and Properties
2009 - Wiley | Advanced Engineering Materials
Masahito Hanao, Masayuki Kawamoto, Akihiro Yamanaka,
In the high speed continuous casting of hypo-peritectic steel slabs, growth of solidified shell just below the meniscus in the mold was researched. Rate of cooling and solidification was estimated on the basis of experimental results of thickness profiles of solidified shell, heat flux in the mold and dendrite arm spacing in the solidified structure beneath the surface of the slabs cast at 3–5 m/min.As a result, it was found that there is a delaying period of solidification growth at the beginning, ...
Tópico(s): Aluminum Alloy Microstructure Properties
2009 - The Iron and Steel Institute of Japan | ISIJ International
Masahito Hanao, Masayuki Kawamoto, Masashi Hara, T. Murakami, Hirohisa Kikuchi, Kazuharu Hanazaki,
High speed continuous casting technique for hypo-peritectic medium thick slab was developed. For mild-cooling of solidified shell, the mold flux was designed to crystallize effectively by new method which gives accurate phase relation between mold flux composition and cuspidine (3CaO·2SiO2·CaF2).The results were as follows;(1) It was possible to increase casting speed to 5.0 m/min without surface longitudinal cracking on slabs by the developed mold flux of mild-cooling.(2) The stability of phase ...
Tópico(s): Solidification and crystal growth phenomena
2002 - The Iron and Steel Institute of Japan | Tetsu-to-Hagane
Masahito Hanao, Masayuki Kawamoto,
The film, which is formed by mold flux in the continuous casting mold, plays very important roles in terms of lubrication or heat transfer. However, the thickness or structure of it has not been adequately clarified.In this study, the sample of actual flux film was taken from the continuous casting mold just after the cast, keeping its position as it was during the cast. Thanks to this trial, thickness of the flux film at the meniscus in the mold could be clarified. According to the observation ...
Tópico(s): Radiative Heat Transfer Studies
2008 - The Iron and Steel Institute of Japan | ISIJ International
Masashi Nakamoto, Masahito Hanao, Toshihiro Tanaka, Masayuki Kawamoto, Lauri Holappa, Marko Hämäläinen,
Neural network computation was applied to the estimation of surface tension in ternary silicate melts. In addition, the criterion for designing the units in the middle layer of the layer-type neural network computation was discussed. It was found that the Cp-criterion modified by considering the degrees of freedom in the neural network computation was useful for determining the number of units in the middle layer, which gives an optimal estimation. The surface tension calculated by neural network ...
Tópico(s): Pigment Synthesis and Properties
2007 - The Iron and Steel Institute of Japan | ISIJ International
Masahito Hanao, Toshihiro Tanaka, Masayuki Kawamoto, Kouji Takatani,
A thermodynamic model for determining the surface tension of molten ionic mixtures, derived by considering the ionic radii of the components, was extended to multi-component slag systems. The composition dependence of the surface tension in 6-component systems of the type CaO–SiO2–Al2O3–MgO–Na2O–CaF2 was evaluated with the present model using information based on the surface tension and molar volume of the pure oxide components, and on the anionic and cationic radii. The evaluated results for the ...
Tópico(s): Recycling and utilization of industrial and municipal waste in materials production
2007 - The Iron and Steel Institute of Japan | ISIJ International
Takashige Kawakami, Norihide Hanao, Kaori Nishiyama, Yoshito Kadota, Masahisa Inoue, Masao Sato, Shinya Suzuki,
Metals and metalloid species are involved in homeostasis in energy systems such as glucose metabolism. Enlarged adipocytes are one of the most important causes of obesity-associated diseases. In this study, we studied the possibility that various metals, namely, CoCl2, HgCl2, NaAsO2 and MnCl2 pose risk to or have beneficial effects on white adipose tissue (WAT). Exposure to the four metals resulted in decreases in WAT weight and the size of enlarged adipocytes in mice fed a high-fat diet (HFD) without ...
Tópico(s): Vitamin D Research Studies
2011 - Elsevier BV | Toxicology and Applied Pharmacology
Masahito Hanao, Masayuki Kawamoto, Toshihiro Tanaka, Masashi Nakamoto,
A new estimation method of viscosity or solidification temperature of mold fluxes was proposed by applying the neural network computation. In this evaluation system, the viscosity and the solidification temperature of mold fluxes can be evaluated from the analytical compositions in multi-component systems of SiO2–Al2O3–CaO–MgO–Na2O–F–T.Fe–ZrO2–TiO2–BaO–MnO–B2O3–S–C without any conversion of S or F to sulphide or fluoride. It was found that the calculated results of the dependence of viscosity on ...
Tópico(s): Powder Metallurgy Techniques and Materials
2006 - The Iron and Steel Institute of Japan | ISIJ International
Masahito Hanao, Masayuki Kawamoto, Akihiro Yamanaka,
Continuous casting of hypo-peritectic steel was conducted with a pilot slab caster. Such experimental data as local heat flux, thickness of solidified shell or mold flux film, and dendrite primary arm spacing were obtained. On the basis of these experimental results, influence of mold flux on initial solidification in the mold was discussed. With mild cooling by crystallization of mold flux, local heat flux and solidification rate decreased in the mold. The changes in them quantitatively correspond ...
Tópico(s): Aluminum Alloy Microstructure Properties
2012 - The Iron and Steel Institute of Japan | ISIJ International
Begoña Santillana, Rob Boom, Dmitry Eskin, Hideo Mizukami, Masahito Hanao, Masayuki Kawamoto,
Tópico(s): Metallurgy and Material Forming
2012 - Springer Science+Business Media | Metallurgical and Materials Transactions A
Masahito Hanao, Masayuki Kawamoto, Tadao Watanabe,
Phase relation between mold flux composition and cuspidine was researched fundamentally. Solidification temperatures of the mold flux were measured at various compositions, and crystal compositions in their solidified structure were identified by X-ray diffraction analysis. Based on these results, the phase relation between the mold flux composition and cupsidine was considered. In the relation between basicity (T.CaO/SiO2) and the solidification temperature, there was a peak of the solidification ...
Tópico(s): Solidification and crystal growth phenomena
2004 - The Iron and Steel Institute of Japan | ISIJ International
Nobuyuki Takahira, Masahito Hanao, Yuichi Tsukaguchi,
Fluorine-free mould flux has been required to reduce corrosion of continuous casters. In this paper, Na2Ca2Si3O9 has been applied to an alternative crystalline phase of Ca4Si2O7F2 (cuspidine) that crystallized in commercial flux films. Effects of basicity described as T.CaO/SiO2 and additions of Li2O, Na2O, MgO and/or MnO into Na2Ca2Si3O9 composition mould flux on viscosity and solidification temperature were studied and the solidified specimens were examined by X-ray diffraction to identified crystalline ...
Tópico(s): Materials Engineering and Processing
2013 - The Iron and Steel Institute of Japan | ISIJ International
Crystallization of mold flux was observed with confocal laser microscope. Crystallization temperature, CCT curve and crystallization rate were evaluated from the observed images. The evaluated results were compared between two kinds of mold flux, and influence of basicity on crystallization rate was discussed. Crystallization temperature increased with basicity. Crystallization rate also increased with basicity, but its dependency on cooling rate was differed by basicity. The difference could be ...
Tópico(s): Solidification and crystal growth phenomena
2013 - The Iron and Steel Institute of Japan | ISIJ International
Toshihiro Tanaka, Hiroki Goto, Masashi Nakamoto, Masanori Suzuki, Masahito Hanao, Masafumi Zeze, Hideaki Yamamura, Takeshi Yoshikawa,
The authors investigated the change in the interfacial tension with time for various combinations of molten slag and liquid Fe to elucidate the mechanism of the change in interfacial tension between liquid Fe alloy and molten slag over time accompanying reduction/oxidation reactions. The behavior of the change in the interfacial tension over time can be explained by the adsorption of oxygen at the interface and the diffusion of oxygen from the interface into the bulk of the liquid Fe and molten ...
Tópico(s): Aluminum Alloy Microstructure Properties
2016 - The Iron and Steel Institute of Japan | ISIJ International
Hanao Qin, Li Huang, Jianwen Teng, Baoyao Wei, Ning Xia, Ying Ye,
The raw tea polysaccharides (RLTPS) and the aged tea polysaccharides (ALTPS) from raw and aged Liupao tea were extracted and purified to afford five refined fractions. Component analysis revealed that the crude polysaccharide content from raw Liupao tea increased from 1.83 ± 0.09 g / 100 g to 3.44 ± 0.28 g / 100 g and the molecular weight decreased after fermentation. Structural analysis indicated that the molar ratio of rhamnose, galactose, and galacturonic acid increased in refined ALTPS. All the refined ...
Tópico(s): Phytoestrogen effects and research
2021 - Elsevier BV | Food Chemistry
Masahito Hanao, Masayuki Kawamoto, Akihiro Yamanaka,
Continuous casting of hypo-peritectic steel was conducted with a pilot slab caster. Such experimental data as local heat flux, thickness of solidified shell or mold flux film, and dendrite primary arm spacing were obtained. On the basis of these experimental results, influence of mold flux on initial solidification in the mold was discussed.With mild cooling by crystallization of mold flux, local heat flux and solidification rate decreased in the mold. Their changes quantitatively correspond to ...
Tópico(s): Microstructure and Mechanical Properties of Steels
2014 - The Iron and Steel Institute of Japan | Tetsu-to-Hagane
Chengyi Li, Srinivas Appari, Ryota Tanaka, Kyoko Hanao, Yeonkyung Lee, Shinji Kudo, Jun‐ichiro Hayashi, Vinod M. Janardhanan, Hiroaki Watanabe, Koyo Norinaga,
A computational fluid dynamics (CFD) approach to simulate reacting flow in a hot coke oven gas (HCOG) reformer is presented. The HCOG was reformed by non-catalytic partial oxidation in a tubular reactor (0.6 m i.d. and ∼4.1 m long) with four oxygen nozzles (0.0427 m i.d.), which was installed on a platform of an operating coke oven. The reforming of HCOG, a multi-component mixture, in a turbulent flow was simulated numerically by considering both chemical reactions and fluid dynamics. The detailed chemical ...
Tópico(s): Catalysts for Methane Reforming
2015 - Elsevier BV | Fuel
Masaaki Hanao, Hidetaka Hayashi, Akira Kishimoto,
We have already fabricated ceramic mono-foams by expanding once-sintered dense shells utilizing the superplastic deformation of 3YSZ, 8YSZ, alumina and titania based ceramics. In the present study, granular coating method was applied to make a porous ceramics through the superplastically foaming method based on 3YSZ. Both mechanical strength and thermal conductivity were measured and compared with those of fully densified as well as conventional porous 3YSZ ceramics. Porous ceramics with porosity ...
Tópico(s): Cellular and Composite Structures
2008 - | Journal of the Japan Society of Powder and Powder Metallurgy
Shigeta Hara, Masashi Hanao, Kazumi Ogino,
The interfacial tension between a liquid Cu-Bi or Cu-Pb alloy and solid Cu was measured by using multiphase equilibria. The results are summarized as follows:(1) The surface tension of solid Cu coexisting with the liquid Cu-Bi or Cu-Pb alloy is significantly lower than that of pure solid Cu, becase Bi or Pb vapor atoms are adsorbed on the surface.(2) The measured interfacial tension, γSL, between the liquid Cu-Bi or Cu-Pb alloy and solid Cu is in fairly good agreement with that calculted by the ...
Tópico(s): Engineering and Materials Science Studies
1993 - Japan Institute of Metals and Materials | Journal of the Japan Institute of Metals and Materials
M. Kawamoto, T. Murakami, M. Hanao, Hirohisa Kikuchi, T. Watanabe,
AbstractAbstractMould powder consumption is an important parameter in continuous casting. Previous investigations, involving regression analysis or estimation of powder consumption, have identified the factors controlling powder consumption. However, those data were obtained for casting speeds less than 2 m min -1, and some relate to speeds less than 1 m min -1. Sumitomo Metal Industries has developed a medium thick high speed continuous casting operation for speeds between 2 and a maximum of 8 m ...
Tópico(s): Materials Engineering and Processing
2002 - Taylor & Francis | Ironmaking & Steelmaking Processes Products and Applications
Masahito Hanao, Masayuki Kawamoto,
The film, which is formed by mold flux in the continuous casting mold, plays very important roles in terms of lubrication or heat transfer.But, thickness or structure of it has not been adequately clarified.In this study, it was tried to take the sample of actual flux film from the continuous casting mold just after the cast, keeping its position as it was during the cast. Thanks to this trial, thickness of the flux film at the meniscus in the mold could be clarified. According to the observation ...
Tópico(s): Radiative Heat Transfer Studies
2006 - The Iron and Steel Institute of Japan | Tetsu-to-Hagane
Manabu Iguchi, Hiroaki Kosaka, Atsushi Hayashi, Yukio Terauchi, Hideo Mizukami, Masahito Hanao, Masayuki Kawamoto, Hirotoshi Kawabata,
Tópico(s): Cyclone Separators and Fluid Dynamics
1999 - Springer Science+Business Media | Metallurgical and Materials Transactions B
Masanori Suzuki, Masashi Nakamoto, Toshihiro Tanaka, Yuichi Tsukaguchi, Kazuaki Mishima, Masahito Hanao,
In continuous casting process of steel, the slag entrapment into liquid steel should be minimized by controlling the interfacial tension between liquid steel and molten slag. However, the liquid iron/molten slag interfacial tension dynamically changes when redox chemical reaction occurs at the iron/slag interface. This dynamic change behavior of the interfacial tension could be explained by assuming excess adsorption of oxygen atoms made by the decomposing reaction of slag components and its desorption ...
Tópico(s): Aluminum Alloy Microstructure Properties
2020 - The Iron and Steel Institute of Japan | ISIJ International
Mami Hanao, Kotaro Aoki, Yoshikazu Ishii, Ken Shimuta, Makoto Ohnishi, Kazuhiro Tateda,
Abstract Objectives To investigate the spread of ceftriaxone-resistant Neisseria gonorrhoeae lineages similar to strains H041 (2009) and FC428 (2015), we characterized 55 strains collected in 2013 from hospitals across Japan. Methods Susceptibility testing and whole-genome sequencing. Results Susceptibility rates were 58% for cefixime and 98% for ceftriaxone. The 55 strains were whole-genome sequenced and classified into nine MLST-STs. MLST-ST1901 was the most prevalent (n = 19) followed by MLST-ST7363 ( ...
Tópico(s): Streptococcal Infections and Treatments
2021 - Oxford University Press | Journal of Antimicrobial Chemotherapy
... reports the following articles citing this article:Masahito Hanao Influence of Basicity of Mold Flux on its ... https://doi.org/10.2355/tetsutohagane.100.951Masahito Hanao Influence of Basicity of Mold Flux on its ...
1973 - University of Chicago Press | History of Religions
Yuichi Tsukaguchi, Masahito Hanao, Masayuki Kawamoto, Manabu Adachi, Hiroshi Hayashi,
Two characteristics, high basicity and high viscosity, are required for the anti-entrapment mould flux. However, it had been difficult to apply the high basicity and high viscosity mould flux for a round billet casting because of heat flux fluctuations in the mould.We supposed that the heat flux fluctuations were caused by unstable crystallization of the flux film between the mould and the solidified shell. Assuming that the contaminating constituents which do not compose the main crystal phase ...
Tópico(s): Metallurgy and Material Forming
2011 - The Iron and Steel Institute of Japan | Tetsu-to-Hagane
Hideo Mizukami, Masahito Hanao, Sei Hiraki, Masayuki Kawamoto, Tadao Watanabe, Atsushi Hayashi, Manabu Iguchi,
A sensor for flow velocity measurement of molten steel was developed which measured the shedding frequency of Karman vortex streets behind a refractory cylinder, and then the absolute value of flow velocity below the meniscus in a high speed continuous casting mold was made clear. Experiment for calibration of this sensor was done using both molten steel and molten metal which having low melting point. It was found that the flow velocity was described as a function of both the shedding frequency ...
Tópico(s): Advanced Surface Polishing Techniques
2000 - The Iron and Steel Institute of Japan | Tetsu-to-Hagane
Masanori Suzuki, Shota Tanaka, Masahito Hanao, Toshihiro Tanaka,
Surface tension of molten ionic mixtures such as slag is an important physical property related directly to various surface or interfacial phenomena in high-temperature industrial processes. In particular, surface tension of oxide–fluoride melts is of interest to understand interfacial phenomena in continuous casting in steelmaking. However, the composition dependence of surface tension in reciprocal ionic melts has not been well understood because of its complexity related to the reciprocal reaction ...
Tópico(s): Advanced ceramic materials synthesis
2016 - The Iron and Steel Institute of Japan | ISIJ International
Masaki Hara, Hisaji Kikuchi, M. Hanao, M. Kawamoto, T. Murakami, T. Watanabe,
It is necessary for a machine casting products of medium thickness to cast at a speed as high as possible for productivity. But, longitudinal surface cracks and fluctuation of molten steel level increase as the casting speed increases. The peritectic steel grade is most sensitive to such defects and phenomena. Thanks to various technological developments, the peritectic steel grade could be cast at a casting speed of 5.0 m/min, which is the highest used ever.
Tópico(s): Material Properties and Applications
2002 - Dunod | Revue de Métallurgie