| 摘要 |
A method is disclosed of forming a billet (30, 200, 300) comprising charges of swarf compacted cyclically into a number of briquettes (32, 202, 304) joined together. The billet may also comprise a tube (34, 204, 302) which forms a jacket around the briquettes. The briquettes are joined at interfaces which have complementary interengaging formations (206, 208, 306, 308). The formations may have frusto-conical shapes which are co-axial with the briquettes. Each interface may have a substantially flat annular peripheral portion (210, 310) normal to the longitudinal axis. |
