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公开(公告)号：US5505246A
公开(公告)日：1996-04-09
申请号：US261484
申请日：1994-06-17
CPC分类号： B22C3/00 , B22D27/003
摘要： Method and apparatus are provided for casting titanium-aluminum alloys including generally 10 weight % or more Al in a reusable metallic mold or die in a manner that retards or avoids build-up of a deleterious aluminum layer on the mold or die cavity surfaces that adversely affects surface quality of castings solidified therein.
摘要翻译： 提供的方法和装置用于在可重复使用的金属模具或模具中铸造包括通常为10重量％或更多的Al的钛 - 铝合金，其方式是延迟或避免在模具或模具空腔表面上积累有害的铝层， 影响其中固化的铸件的表面质量。
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公开(公告)号：US5263530A
公开(公告)日：1993-11-23
申请号：US758908
申请日：1991-09-11
申请人： Gregory N. Colvin
发明人： Gregory N. Colvin
CPC分类号： B22D19/00
摘要： A method of making a composite casting wherein a casting mold is provided for receiving a melt and a preformed metallic or intermetallic insert is positioned in the mold cavity. The preformed insert includes a working portion for incorporation in the casting and gas seal-forming means located at a region of the insert at least outboard of the insert portion. A melt is introduced into the mold about the insert and is then solidified to provide a composite casting having the insert working portion disposed in the solidified melt and as-cast gas seal regions located outboard of the insert working portion in the casting. The casting is then subjected to elevated temperature and isostatic gas pressure conditions wherein the as-cast gas seal regions are effective to inhibit gas penetration between the insert working portion and the solidified melt therearound so as to permit formation of a sound, void-free metallurgical bond therebetween. The hot isostatically pressed casting can then be trimmed to remove, if desired, those outboard portions containing the gas seal regions, leaving a finished casting having the insert working portion metallurgically bonded therein in a sound, void-free manner.
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