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Title:
PROCESS FOR PRODUCTION OF METAL BALL
Document Type and Number:
WIPO Patent Application WO/2011/125250
Kind Code:
A1
Abstract:
Disclosed is a process for producing a metal ball, which comprises the steps of: providing a predetermined mass of a raw material piece; making a plasma flame by a high-frequency energy generated from a plasma working gas and a high-frequency induction coil and increasing the nitrogen concentration in a plasma generation space to 2 vol% or more; introducing the raw material piece into the plasma flame to melt the raw material piece and spheroidizing the molten product; and solidifying the molten and speroidized raw material. Nitrogen can be introduced into the metal ball through the speroidizing step and the solidifying step.

Inventors:
FUKUMARU Mariko (HITACHI METALS LTD., 2107-2, Yasugicho, Yasugi-sh, Shimane 01, 〒6928601, JP)
福丸 麻里子 (〒01 島根県安来市安来町2107番地2 日立金属株式会社 冶金研究所内 Shimane, 〒6928601, JP)
HAN Gang (HITACHI METALS LTD., 2107-2, Yasugicho, Yasugi-sh, Shimane 01, 〒6928601, JP)
韓 剛 (〒01 島根県安来市安来町2107番地2 日立金属株式会社 冶金研究所内 Shimane, 〒6928601, JP)
Application Number:
JP2010/069310
Publication Date:
October 13, 2011
Filing Date:
October 29, 2010
Export Citation:
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Assignee:
HITACHI METALS, LTD. (2-1 Shibaura 1-chome, Minato-ku Tokyo, 14, 〒1058614, JP)
日立金属株式会社 (〒14 東京都港区芝浦一丁目2番1号 Tokyo, 〒1058614, JP)
TEKNA Plasma Systems Inc. (2935, Boul. Industriel Sherbrooke Quebec, J1L2T9, J1L2T9, CA)
テクナ プラズマ システムズ インコーポレーテッド (J1L2T9 ケベック シャーブルック インダストリアル ブール 2935 Quebec, J1L2T9, CA)
FUKUMARU Mariko (HITACHI METALS LTD., 2107-2, Yasugicho, Yasugi-sh, Shimane 01, 〒6928601, JP)
福丸 麻里子 (〒01 島根県安来市安来町2107番地2 日立金属株式会社 冶金研究所内 Shimane, 〒6928601, JP)
International Classes:
B22D25/02; B22D23/00; B22F1/00; B22F9/04
Attorney, Agent or Firm:
ASAMURA Kiyoshi et al. (Tennoz Central Tower, 2-2-24 Higashi-Shinagawa, Shinagawa-k, Tokyo 76, 〒1408776, JP)
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Claims: