| 摘要 |
FIELD: powder metallurgy, namely processes for hot pressing of parts with inner cavities, mainly of powders of refractory ceramic materials. ^ SUBSTANCE: method comprises steps of shaping blank; placing it in die of graphite press-mold; forming layer of separation material between blank and shaping members of press-mold; hot pressing of blank; after termination of hot pressing fixing part in cavity of die and releasing punches at temperature of hot pressing. Graphite press-mold includes heater in the form of yoke having bandage ring of high-strength carbon composition material. Upper punch is mechanically joined with holder and it is mounted with possibility of fixation in limit upper position. Lower punch and die are mounted with possibility of mutual motion. ^ EFFECT: enhanced quality of parts. ^ 4 cl, 1 dwg, 1 ex |
