Sumitomo Electric Industries, Limited

A.l.m.t. Corporation

Sumitomo Rubber Industries Limited

Japan As Represented by Director General of Agency of Industrial Science

Sri Sports Limited

Noboru Uenishi

Akihiko Ikegaya

Toshiaki Sakaki

Tetsuo Mizoguchi

Katsuhito Yoshida

Nobuhito Kuroishi

Yoshiyuki Hirose

Koichi Sogabe

Yoshihiko Doi

Hideaki Awata

Takehisa Yamamoto

Yumi Kanemitsu

Sadamu Ishidu

Shinji Kikuhara

Shigekazu Yamazaki

Ayuri Tsuji

Shigeki Ochi

Toshihiko Takiguchi

Hitoshi Takii

Satoshi Umemoto

Hitoshi Inoue

Yasushi Itoh

Toshinori Sakamaki

Norihito Goma

Yasuhiko Suzuki

Hitoshi 1-3 1-Chome Shimaya Takii

Toshihiko 1-3 1-Chome Shimaya Takiguchi

The present heat-resistant tungsten alloy has a first phase containing W as a major component, a second phase having a carbonitride of at least one element of Ti, Zr and Hf and containing the carbonitride as a major component when W is removed, and a third phase having a carbide of at least one element of group 5A elements in the periodic table and containing the carbide as a major component when W is removed, the heat-resistant tungsten alloy having a Vickers hardness of 550 Hv or more at a room temperature, a displacement of 1 mm or more when leading to fracture, as determined in a three point bending test at 1200&#xb0; C., and a 0.2% proof stress of 900 MPa or more, as determined in the three point bending test at 1200&#xb0; C.

Heat-resistant tungsten alloy, friction stir welding tool, and production method

Provided are an ancillary material, used for shape processing, which is capable of shortening a processing time, avoiding a reduction in quality of a shape provided to a workpiece material, and allowing a relatively low manufacturing cost; a processing method using the ancillary material; and a method of manufacturing the ancillary material. The tungsten alloy grains () comprise: tungsten of greater than or equal to 80% by mass and less than or equal to 98% by mass; nickel; at least one kind of metal selected from the group consisting of iron, copper, and cobalt; and an inevitable impurity, a maximum diameter thereof is greater than or equal to 0.1 mm and less than or equal to 5.00 mm, and a specific surface area thereof is less than or equal to 0.02 m/g. The tungsten alloy grains (), the workpiece material (), an abrasive () are blended in a container () and the container is rotated, thereby processing the shape of the workpiece material (). In the method of manufacturing the tungsten alloy grains (), a granulated powder is stirred at a temperature greater than or equal to a softening point of an organic binder and thereafter, is cooled, thereby spheroidizing the granulated powder.

Tungsten alloy grains, processing method using the same, and method for manufacturing the same

A high specific-gravity EPDM composition consisting of a mixture of EPDM containing diene at less than 4.5 wt % and ethylene at not less than 58 wt % nor more than 80 wt % and having a Mooney viscosity MLnot less than 50 nor more than 170 at 125&#xb0; C. and a powdery material, containing powder whose specific gravity is not less than 12 as a main component thereof, added to the EPDM at not less than 80 wt % nor more than 97.5 wt % of a whole amount of the high specific-gravity EPDM composition.

High-specific-gravity EPDM composition, dynamic damper made from the composition, tennis racket with the dynamic damper, and radiation-shielding material comprising the composition

A high quality electrical contact that is made of a Cd free Ag alloy and can be applied to a breaker is provided. The electrical contact is made of an Ag alloy containing Sn and In each 1 to 9% by weight, and has a first layer as the surface layer and a second layer as an internal portion. The hardness of the first layer and the hardness of the second layer are equal to or more than 190 and equal to or less than 130, respectively, based on micro Vickers standard defined by JIS. The thickness of the first layer is within the range from 10 to 360 &#x3bc;m. In particular, the electrical contact has a high quality temperature characteristic as well as a high quality welding resistance characteristic.

Electric contact and breaker using the same

Manufacturing method of super-heat-resisting alloy material

Growing community of inventors

Itami, Japan

Noboru Uenishi