| 摘要 |
PCT No. PCT/GB85/00140 Sec. 371 Date Nov. 18, 1985 Sec. 102(e) Date Nov. 18, 1985 PCT Filed Apr. 2, 1985 PCT Pub. No. WO85/04605 PCT Pub. Date Oct. 24, 1985.A squeeze formed aluminium alloy article, such as a piston, is formed with a re-entrant cavity (14) with reinforced edges by locating an isostatically compacted salt core (10) and annular alumina-silicate fibre pad (11) in the mould cavity of the squeeze forming press prior to introduction of the molten metal therein. The core (10) is subsequently dissolved from the squeeze formed article to provide a reinforced corresponding shape to the article which does not require subsequent machining.
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