| 摘要 |
The invention concerns a method relating to powder metallurgical manufacturing of a body having a through hole, for example a hollowed tool blank or a thick-walled tube. The characteristic feature of the method is that in an outer capsule there is provided a tube (6) having substantially the same length as the capsule, so that the tube extends substantially through the entire length of the capsule, that in the tube there is provided a core (5) which also extends through the capsule and the entire length of the tube, that the space between the tube (6) and the inner side of the capsule (1) is filled with a metal powder (9) which shall form the desired body, that the space (10) in the tube (6) between the core (5) and the inner side of the tube is filled with a non-metallic powder (1), that the capsule is closed hermetically, and tha t the closed capsule and its content is subjected to hot isostatic compaction at a temperature exceeding 1000 DEG C, so that the metal powder is compacted to complete density. |
