| 摘要 |
<p>PURPOSE:To fixedly weld an inner sleeve and an outer sleeve in a favorable and stable manner, by inserting a joining material consisting of a particular alloy between the inner and outer sleeves. CONSTITUTION:An inner sleeve 3 which is made of Ta, Mo, W or an alloy thereof and joined at one end with a base metallic body consisting of W impregnated with an electronic radiative material and an outer sleeve 4 which is fixedly welded to this one end of the inner sleeve 3 for supporting the same and made of Ni, Fe or an alloy thereof are fixedly welded togethe at the other end of said inner sleeve 3. When they are welded to form the structure, a joining material 11 consisting of a Re. Re-Mo alloy or Re-W alloy is inserted between th inner and outer sleeves 3 and 4 at this welded portion. Since the inserted joining material of Re, Re-Mo alloy or Re-W alloy is easy to alloy, the sleeves can be welded solidly and therefore favorable electronic tube characteristics can be maintained.</p> |
