Title:
【発明の名称】超高真空下で溶解可能なコールドウォール溶解炉と溶解方法
Document Type and Number:
Japanese Patent JP3374549
Kind Code:
B2
Abstract:
PURPOSE: To enable a more high degree vacuum state to be realized by a method wherein an induction heating coil of a cold-wall vacuum induction melting furnace and an inter-furnace wiring are formed of a water-cooled copper pipe not covered with an insulation cover and further a composing element such as a vacuum tank is processed to have a smooth surface by an electrolytic grinding and a chemical grinding or the like. CONSTITUTION: An induction heating coil 8 of vacuum pipe arranged at an outer circumference of a main body 1 of a cold-wall vacuum melting crucible stored in a vacuum tank and a vacuum conduit 4 for electrically connecting between the induction heating coil 8 and a power supply and performing a cooling of the induction heating coil 8 ar formed of a bare copper pipe having no insulating coverage so as to eliminate a gas discharged out of an insulation covering layer. An inner surface of the vacuum tank and/or an entire surface of the main body 1 of the cold-wall vacuum melting crucible is smoothed through an electrolytic grinding plus complex grinding, and a glass-bead blast processing. With such an arrangement as above, gas discharged out of the surface of the main body 1 is reduced and a vacuum-reaching pressure is further reduced.
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Inventors:
Masahiro Tadokoro
Application Number:
JP25969094A
Publication Date:
February 04, 2003
Filing Date:
September 30, 1994
Export Citation:
Assignee:
Shinko Electric Co., Ltd.
International Classes:
C22B9/04; F27B14/06; F27B14/10; (IPC1-7): F27B14/06; C22B9/04; F27B14/10
Domestic Patent References:
| JP344133B2 |
Other References:
Ｄ．Ｊ．Ｃｈｒｏｎｉｓｔｅｒ，Ｓ．Ｗ．Ｓｃｏｔｔ，Ｄ．Ｒ．Ｓｔｉｃｋｌｅ，Ｄ．Ｅｙｌｏｎ ａｎｄ Ｆ．Ｈ．Ｆｒｏｅｓ，Ｉｎｄｕｃｔｉｏｎ Ｓｋｕｌｌ Ｍｅｌｔｉｎｇ ｏｆ Ｔｉｔａｎｉｕｍ ａｎｄ Ｏｔｈｅｒ Ｒｅａｃｔｉｖｅ Ａｌｌｏｙｓ，Ｊｏｕｒｎａｌ ｏｆ Ｍｅｔａｌｓ，米国，５１−５４
Attorney, Agent or Firm:
Haruya Saito (1 person outside)