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Matsuda N.,Hokkaido Sumiden Precision Co. | Tanaka A.,Sumitomo Electric | Kuroda Y.,Sumitomo Electric Industries | Maeta A.,Sumitomo Electric
SEI Technical Review | Year: 2012

General-purpose face milling cutters are widely used in metal machining. These tools are required to reduce machining cost and offer a wide range of applications. Furthermore, they need to ensure excellent surface finish for highly functional parts. To address these challenges, Sumitomo Electric Hardmetal Corporation has developed a new milling cutter "SEC-Dual Mill DGC" series for general-purpose face milling. This series employs negative inserts which can be used on both sides to enable cost effective machining. Moreover, the cutter body can use both square inserts with 8 cutting edges and octagonal inserts with 16 cutting edges. A variety of breakers, including burr-reducing breakers, are also available to provide a broad range of applications.


Kanaoka H.,Sumitomo Electric | Sakamoto A.,Sumitomo Electric | Morimoto H.,Sumitomo Electric | Okada Y.,Sumitomo Electric | And 4 more authors.
SEI Technical Review | Year: 2011

Sumitomo Electric Hardmetal Corporation has newly developed a coated carbide grade "ACE COAT AC810P." AC810P is a grade used exclusively for high speed steel turning, featuring more than 1.5 times higher wear resistance than that of our conventional model "AC700G." AC810P has successfully achieved this property using our original chemical vapor deposition (CVD) coating technology "Super FF Coat." This coat consists of a titanium carbonitride film with a fine, smooth surface and an alumina film with a cemented carbide substrate. AC810P also realizes higher resistance to crater wear by applying a reinforced thick alumina coating. Recently, the authors have also developed a highly efficient chip breaker "ME-type" for roughing, applying similar designing concepts as previously developed "SE-type" and "GEtype." Combination use of ACE COAT AC810P and either SE-type, GE-type or ME-type chip breaker remarkably improves tool life and machining efficiency. With our coated carbide series, consisting of the three steel turning grades: "AC810P" for high speed and continuous machining, "AC820P" for general machining, and "AC830P" for interrupted machining, Sumitomo Electric Hardmetal Corporation meets expectations from customers who wish to save on machining costs and improve productivity.


Kashiwaya Y.,Hokkaido University | Kashiwaya Y.,Kyoto University | Watanabe M.,Hokkaido Sumiden Precision Co.
ISIJ International | Year: 2012

Utilization of heat of slag is key technology for the reduction of CO 2 emission in steel industries. While hydrogen production is important for the society of aiming to the sustainable energy system, the green hydrogen must be produced for the actual CO 2 reduction. In the present study, methane gas was injected into a molten slag and hydrogen was produced through the thermal decomposition reaction. CH 4 = C + 2H 2 Kinetic analysis was performed using an graphite crucible both with empty and slag. The rate constants for the graphite crucible, k G and the slag, k S, were obtained separately. The rate constants for graphite surface and slag surface, kG and kS, respectively, are as follows: k G| cm · s -1=41.74×exp(-51741/RT)±0.05 k s| cm · s -1=4.053×10 6× exp(-190310/RT)±0.05 Using the obtained rate constants, the increase of the area of reaction surface during the CH4 injection was estimated. It was found that the slow soaking of the injecting lance could be utilized for the heat of molten slag. In addition, the slag shape can be a powder type through the injection of CH 4. © 2012 ISIJ.


Kashiwaya Y.,Hokkaido University | Kashiwaya Y.,Kyoto University | Watanabe M.,Hokkaido Sumiden Precision Co.
ISIJ International | Year: 2012

How to produce the green hydrogen is important problem for reducing the CO 2 emission. Among many processes on the production of hydrogen, a thermal decomposition reaction of CH 4 can produce the pure hydrogen without CO and CO 2 gases. When the reaction proceeds by using a waste heat, the obtained hydrogen will be approached to the green hydrogen. The thermal decomposition reaction of CH 4 is mainly studied kinetically from several decades ago. CH 4(g) = C(s)+ 2H 2(g) However, the decomposition reaction on the surface of molten slag was not studied. Authors have studied the kinetics of decomposition reaction of CH 4 on the surface of the molten slag in the previous study. The rate constant at 1 700 K for the surface of the molten slag was about four times larger than that of graphite surface. In addition to the kinetics of the reaction, the carbon properties precipitated are quite interesting, because the structures of carbon are changed by the conditions such as the temperature and kind of solid/liquid surface which provided the reaction sites. In this study, it was found that two kinds of carbon were precipitated during the decomposition of CH 4, when a molten slag existed in the system. The micro- and nano-structures of carbons precipitated were examined using SEM and TEM. The onion type carbon sphere were clarified, which were formed in the gas phase, furthermore, the high oriented graphite film was formed on the surface of molten slag. © 2012 ISIJ.


Tsujino J.,Hokkaido Electric Power Co. | Yamazaki I.,Hokkaido Sumiden Precision Co. | Shimada S.,Hokkaido University
Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy | Year: 2010

Monolithic and composite ceramic films of TiN, Ti-Al-N, Ti-B-C-N and PSZ were prepared at relatively higher deposition rate (approximately 100 nm/min) and at lower temperature (< 800C) by a novel thermal plasma CVD designed to spray Ti-, Al-, B-, or Zr-alkoxide solutions into ArZH2ZN2 thermal plasma. Chemical compositions of composite films were controlled by changing of mixing ratios of two kinds of alkoxide solutions and N2 flow rates. PSZ films were prepared by mild oxidation of Y- and Zr-alkoxide solutions with water introduced into the thermal Ar/N2 plasma without oxidation of under layer TiN. Cutting tests of composite TiBCN films deposited on WC-Co cutting tools exhibited better wear resistance compared with commercial TiN coated cutting tools.

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