发明名称 |
Method of producing a high-purity metal member. |
摘要 |
<p>A method of producing high-purity metal member, e.g. zirconium, is provided which reduces impurities present in the metal amd lends itself to mass production. It comprises the steps of charging raw material 6 such as sponge zirconium into a cavity 2 of a mold such as a sleeve-shaped or hearth mold, irradiating the material with electron beams 3a to melt it at a limited area of the cavity so as to form a molten metal pool and elevate the molten metal pool temperature to evaporate away impurities, and shifting the mold relative to the electron beams 3a to effect such melting portion-by-portion. In the case of high-purity sleeve formation, the electron beams are irradiated onto the raw material while rotating the mold so that melting and solidification repeatedly occur in a circumferential direction. The impurities are repeatedly exposed to the electron beams.</p> |
申请公布号 |
EP0146314(A2) |
申请公布日期 |
1985.06.26 |
申请号 |
EP19840308477 |
申请日期 |
1984.12.06 |
申请人 |
HITACHI, LTD. |
发明人 |
IMAHASHI, HIROMICHI;INAGAKI, MASAHISA;AKAHORI, KIMIHIKO;UMEHARA, HAJIME |
分类号 |
B22D13/00;B22D27/15;C22B9/22;C22B34/14;(IPC1-7):C22B9/22 |
主分类号 |
B22D13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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