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US 10,167,536 B2Granted
Tungsten alloy, tungsten alloy part, discharge lamp, transmitting tube, and magnetron
AssigneesKabushiki Kaisha Toshiba, Toshiba Materials Co., Ltd.
InventorsShinichi Yamamoto, Kayo Nakano, Hiromichi Horie, Takashi Sano, Yoshiko Minami, Satoshi Yamaguchi
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Abstract
According to one embodiment, a tungsten alloy includes a W component and a Hf component including HfC. A content of the Hf component in terms of HfC is 0.1 wt % or more and 3 wt % or less.
Claims8
A method for producing a tungsten alloy for a discharge lamp, a transmitting tube or a magnetron, the method comprising:
- mixing a HfC powder comprising primary particles having an average particle diameter of 15 μm or less and a tungsten powder having an average particle diameter of 0.5 to 10 μm to obtain a raw powder;
- molding the raw powder to obtain a molded body;
- sintering the molded body to obtain a sintered body;
- and
- performing at least one process selected from the group consisting of forging, rolling, wiredrawing, cutting, and polishing, after the sintering step;
- wherein a processing ratio [(A−B)/A]×100 of the at least one process is within a range of 30 to 90%, wherein A is a sectional area of the sintered body before the at least one process and B is a sectional area of the sintered body after the at least one process.
3 more elements
Dependencies are inferred from the claim text.